Platform structure of LNG container module and LNG filling station

Abstract

The application discloses a platform structure of an LNG container module and an LNG filling station, and relates to the technical field of LNG filling stations.

Description

Technical Field

[0001] This application relates to the field of natural gas refueling technology, and more specifically, to a platform structure for an LNG container module and an LNG refueling station. Background Technology

[0002] In the current construction and operation of natural gas refueling stations, especially liquefied natural gas (LNG) refueling stations, there are common problems such as dispersed equipment layout, low integration, and complex construction, which restrict construction efficiency, economy, and operational reliability. For example, in existing refueling station designs, one or two equipment units of the LNG refueling machine and unloading skid are often placed outside the storage tank dike. This layout further increases the land requirement of the refueling station. At the same time, the dispersed layout between equipment inevitably leads to an increase in connecting pipelines, requiring a large amount of additional pipeline laying work on the construction site, including but not limited to a series of supporting processes such as pipeline design, welding, pressure testing, and insulation. The cumbersome construction operations ultimately result in low construction efficiency of LNG refueling stations. In addition, the pump pool structure in the current pump skid often requires the construction of an additional auxiliary disassembly and assembly platform when disassembling and maintaining the submersible pump. The disassembly and assembly structure makes the disassembly and assembly operations very cumbersome, and the construction of the auxiliary disassembly and assembly platform is time-consuming, resulting in low operation and maintenance efficiency of LNG refueling stations.

[0003] In conclusion, improving the construction and operation efficiency of natural gas refueling stations has become a pressing technical problem for those skilled in the art. Utility Model Content

[0004] In view of this, this application provides a platform structure for an LNG container module and an LNG refueling station to improve the construction and operation efficiency of natural gas refueling stations.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A platform structure for an LNG container module includes:

[0007] The platform body is arranged adjacent to the tank skid structure of the LNG refueling station and has functional panels. The functional panels are disposed on the platform body in areas adjacent to the pump pool structure of the tank skid. The functional panels can switch between a first position and a second position and lock in place. When the functional panels are locked in the first position, they are flush with the plane of the platform body, providing an operating platform for the hoisting and maintenance of the pump pool structure. When the functional panels are locked in the second position, they are perpendicular to the platform body.

[0008] The unloading skid and the gas dispenser are installed on the main body of the platform. The gas dispenser and the unloading skid are arranged side by side on the main body of the platform, and the gas dispenser is installed on one or both sides of the unloading skid.

[0009] The platform body, the unloading skid, and the gas filling mechanism are integrated into a module. The overall size of the integrated module meets the height and width restrictions of the planned transportation route. The unloading skid has a second module interface that is detachably connected to the first module interface on the pump skid of the tank skid structure.

[0010] In some embodiments, the functional panel is connected to the platform body via a hinge, and the platform body and the functional panel are locked in position by a locking mechanism.

[0011] In some embodiments, the platform structure further includes a drive mechanism connected between the functional board and the platform body, the drive mechanism being used to drive the functional board to switch back and forth between the first position and the second position.

[0012] In some embodiments, the platform structure further includes an explosion-proof air compressor, an air buffer tank, an explosion-proof control cabinet, an air dryer, and an integrated canopy for covering the gas dispenser, all disposed on the platform body.

[0013] In some embodiments, the air buffer tank is disposed on the upper or lower plane of the platform body.

[0014] In some embodiments, the unloading skid has an unloading booster, which is disposed on the upper or lower plane of the platform body.

[0015] In some embodiments, the number of unloading boosters is multiple, and they are arranged in parallel in a split manner;

[0016] The unloading boosters are arranged side-by-side on the upper or lower plane of the platform body.

[0017] In some embodiments, the gas filling pipeline of the gas dispenser is located between the upper and lower planes of the platform body.

[0018] Compared to the background technology description, the LNG container module platform structure provided in this application includes a platform body, an unloading skid, and a refueling machine. The platform body is arranged adjacent to the tank skid structure of the LNG refueling station and has functional panels. The functional panels are set on the platform body in areas adjacent to the pump pool structure of the tank skid. The functional panels can switch between a first position and a second position and lock in place. When the functional panels are locked in the first position, they are flush with the plane of the platform body, providing an operating platform for the hoisting and maintenance of the pump pool structure. When the functional panels are locked in the second position, they are perpendicular to the platform body. The unloading skid and the refueling machine are set on the platform body, arranged side by side on the platform body, with the refueling machine located on one or both sides of the unloading skid. Furthermore, the platform body, the unloading skid, and the refueling machine form an integrated module. The overall dimensions of the integrated module meet the height and width restrictions of the planned transportation route. The unloading skid has a second module interface that is detachably connected to the first module interface on the pump skid of the tank skid structure. In practical applications, the LNG container module platform structure features functional panels on the main platform that correspond to the area adjacent to the pump pool structure of the skid. These functional panels can switch between a first position and a second position and be locked. When locked in the first position, the functional panels are flush with the plane of the main platform, providing a platform footrest for the hoisting and maintenance of the pump pool structure. Compared to the traditional method of building an auxiliary platform for disassembling and assembling the pump pool structure, this greatly simplifies the operation and helps improve the operation and maintenance efficiency of the LNG refueling station. In addition, when locked in the second position, the functional panels are perpendicular to the main platform, forming a protective railing structure to enhance safety performance. On the other hand, since the platform body, unloading skid, and refueling mechanism are integrated modules, the overall size of the integrated modules meets the height and width restrictions of the planned transportation route. Therefore, the integrated modules can be transported as a whole, which greatly reduces transportation costs, and thus reduces the construction cost of natural gas refueling stations. At the same time, the unloading skid has a second module interface that can be detachably connected to the first module interface on the pump skid of the tank skid structure. On the construction site, it can be connected through the first module interface and the second module interface. The installation and dismantling operations are very convenient, saving the cumbersome on-site installation process and effectively improving the construction efficiency of natural gas refueling stations.

[0019] On the other hand, this application also provides an LNG refueling station, including the platform structure described in any of the above schemes. Since the aforementioned platform structure has the above-mentioned technical effects, the LNG refueling station with the platform structure should also have the corresponding technical effects, which will not be repeated here.

[0020] In some embodiments, the LNG refueling station further includes an in-station cofferdam located at the installation site and a tank skid concrete foundation located within the in-station cofferdam, the tank skid structure being located within the tank skid concrete foundation, and the platform body being located within the in-station cofferdam.

[0021] In some embodiments, the platform body is located on one side of the cofferdam within the station, and the cement foundation of the tank skid is arranged adjacent to the platform body and positioned close to the middle of the platform body.

[0022] In some embodiments, the tank skid structure includes a vertical storage tank, a pump skid, and a lifting bracket. The pump skid is integrated into the bottom of the vertical storage tank, and the outer frame of the pump skid is a square frame structure that surrounds the bottom of the vertical storage tank.

[0023] The hoisting bracket is located within the enclosed space of the frame structure and is arranged adjacent to the pump pool structure. The submersible pumps inside the pump pool structure can be hoisted using the hoisting bracket.

[0024] In some embodiments, the lifting bracket is disposed on the outer wall of the vertical storage tank;

[0025] Alternatively, the hoisting bracket may be mounted on the support legs of the vertical storage tank;

[0026] Alternatively, the hoisting bracket may be mounted on the rectangular frame structure.

[0027] In some embodiments, the hoisting bracket includes a fixed part and a rotating part;

[0028] The fixing part is provided on the outer wall of the vertical liquid storage tank, the support leg of the vertical liquid storage tank, or the square frame structure; the rotating part includes a vertical beam and a horizontal beam arranged on the vertical beam, the vertical beam is rotatably arranged above the fixing part, and the horizontal beam is provided with a sliding part for the hoisting rope to pass through.

[0029] In some embodiments, one of the fixing part and the vertical beam is provided with a corner limiting groove, and the other is provided with a sliding protrusion that is slidably adapted to the corner limiting groove.

[0030] The technical features mentioned above, those to be mentioned below, and those shown individually in the accompanying drawings can be combined arbitrarily, provided that the combined technical features are not contradictory. All feasible combinations of features are the technical content explicitly described herein. Any one of the multiple sub-features contained in the same statement can be applied independently, without necessarily being applied together with other sub-features. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 A top view of the integrated module provided in an embodiment of this application;

[0033] Figure 2 for Figure 1 A schematic diagram of the structure along direction A;

[0034] Figure 3 for Figure 1 A schematic diagram of the B-direction structure;

[0035] Figure 4 This is an isometric structural schematic diagram of an LNG refueling station provided in an embodiment of this application;

[0036] Figure 5 A top view of the LNG refueling station provided in an embodiment of this application;

[0037] Figure 6 This is an isometric schematic diagram of the can skid structure provided in the embodiments of this application;

[0038] Figure 7 A schematic diagram of the tank skid structure provided in this application embodiment, in which the submersible pump is lifted out when the lifting bracket is installed (the lifting rope is omitted in the figure);

[0039] Figure 8 A schematic diagram of the structure of the hoisting bracket provided in the embodiments of this application, which is designed with corner limiting grooves and sliding protrusions on the fixed part and the rotating part.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1-Can skid structure;

[0042] 11-Vertical liquid storage tank;

[0043] 12-Pump skid;

[0044] 120-Rectangular structure;

[0045] 121 - First Module Interface;

[0046] 122 - Piping structure;

[0047] 123 - Pump pool structure;

[0048] 1230 - Submersible pump;

[0049] 13- Lifting bracket;

[0050] 131-Fixing part;

[0051] 132 - Rotating part;

[0052] 1321 - Vertical beam;

[0053] 1322 - Crossbeam;

[0054] 1323 - Sliding part;

[0055] 1324 - Diagonal brace;

[0056] 133 - Corner limiting slide;

[0057] 134 - Sliding protrusion;

[0058] 2-Integrated module;

[0059] 21-Platform Main Body;

[0060] 22-Unloading skid;

[0061] 221 - Second Module Interface;

[0062] 222-Unloading turbocharger;

[0063] 23-Gas dispenser;

[0064] 230 - Gas refueling line;

[0065] 24- Explosion-proof air compressor;

[0066] 25-Air buffer tank;

[0067] 26 - Explosion-proof control cabinet;

[0068] 27-Air dryer;

[0069] 28-Functional panels;

[0070] 3- Cofferdam within the station;

[0071] 4-Tank skid cement foundation. Detailed Implementation

[0072] The core of this application is to provide a platform structure for LNG container modules and an LNG refueling station to improve the construction and operation efficiency of natural gas refueling stations.

[0073] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0074] In the current construction and operation of natural gas refueling stations, especially liquefied natural gas (LNG) refueling stations, there are common problems such as dispersed equipment layout, low integration, and complex construction, which restrict construction efficiency, economy, and operational reliability. For example, in existing refueling station designs, one or two equipment units of the LNG refueling machine and unloading skid are often placed outside the storage tank dike. This layout further increases the land requirement of the refueling station. At the same time, the dispersed layout between equipment inevitably leads to an increase in connecting pipelines, requiring a large amount of additional pipeline laying work on the construction site, including but not limited to a series of supporting processes such as pipeline design, welding, pressure testing, and insulation. The cumbersome construction operations ultimately result in low construction efficiency of LNG refueling stations. In addition, the pump pool structure in the current pump skid often requires the construction of an additional auxiliary disassembly and assembly platform when disassembling and maintaining the submersible pump. The disassembly and assembly structure makes the disassembly and assembly operations very cumbersome, and the construction of the auxiliary disassembly and assembly platform is time-consuming, resulting in low operation and maintenance efficiency of LNG refueling stations.

[0075] Based on this, one embodiment of this application provides a platform structure for LNG container modules to improve the construction and operation efficiency of natural gas refueling stations.

[0076] Specifically, refer to Figure 1 Combination Figure 5 As shown, the platform structure of the LNG container module provided in this application embodiment includes a platform body 21, an unloading skid 22, and a gas dispenser 23. The platform body 21 is arranged adjacent to the tank skid structure 1 of the LNG refueling station and has a functional panel 28. The functional panel 28 is set on the platform body 21 in the area adjacent to the pump pool structure 123 of the tank skid structure 1. The functional panel 28 can switch between a first position and a second position and lock the position. When the functional panel 28 is locked in the first position, the functional panel 28 is flush with the plane of the platform body 21, providing an operating platform for the hoisting and maintenance of the pump pool structure 123. When the functional panel 28 is locked in the second position, the functional panel 28 is perpendicular to the platform body 21. The unloading skid 22 and the refueling machine 23 are both set on the platform body 21. The refueling machine 23 and the unloading skid 22 are arranged side by side on the platform body 21, and the refueling machine 23 is set on one or both sides of the unloading skid 22. The platform body 21, the unloading skid 22 and the refueling machine 23 constitute an integrated module 2. The overall size of the integrated module 2 meets the height and width restrictions of the planned transportation route, as shown in the reference. Figure 3 Combination Figure 6 and Figure 7 The unloading skid 22 has a second module interface 221 that is detachably connected to the first module interface 121 on the pump skid 12 of the tank skid structure 1.

[0077] Key terms explained:

[0078] The tank skid structure 1 includes a vertical liquid storage tank 11 and a pump skid 12.

[0079] The core function of the vertical storage tank 11 is to safely and cryogenically store large quantities of LNG. It is the "heart" of the gas station and the storage center for all liquefied natural gas. Its design and management are directly related to the safety and economy of the entire station.

[0080] The core function of pump skid 12 is to provide the necessary power and pressure for LNG transportation. Storage tanks are merely warehouses; the LNG inside will not escape on its own, nor can it be pumped into vehicles at high pressure. The pump skid is the key to solving this problem. Pump skid 12 has a first module interface 121, a piping structure 122, and a pump pool structure 123.

[0081] The unloading skid 22 refers to the highly integrated integration of various equipment required for the unloading process (such as pipelines, valves, instruments, heat exchangers, etc.) onto a unified steel structure base (i.e., skid), forming a complete functional module. Modularization and integration are the core characteristics of skid-mounted equipment. All components have been installed, connected, and tested in the factory; upon arrival at the site, it is simply a "functional package" that needs external connections. As a whole, the unloading skid is specifically responsible for completing the entire operational process of safely transferring liquefied natural gas from transport tankers to on-site storage tanks.

[0082] Location and Structure of Pump Pool Structure 123: This is the core structural component of the pump skid. It is a vertical cylindrical pressure vessel. Its functions include housing the pump body, forming an inlet channel, and providing insulation. Housing the Pump Body: The entire pump body of the cryogenic submersible pump is hoisted from the top and inserted into and fixed within this pump pool; therefore, the pump pool is the pump's "home." Forming an Inlet Channel: After LNG enters from the pump inlet valve, it flows directly into the pump pool, filling the area around the pump body and providing sufficient liquid for the pump's suction inlet. Insulation: As a pressure vessel, it also helps reduce the loss of LNG's cold energy.

[0083] In practical applications, the LNG container module platform structure utilizes functional panels 28 on the platform body 21, corresponding to the area adjacent to the pump pool structure 123 of the skid structure 1. These functional panels 28 can switch between a first position and a second position and be locked. When locked in the first position, the functional panel 28 is flush with the plane of the platform body 21, providing an operating platform for the hoisting and maintenance of the pump pool structure 123, thus acting as a footrest. Compared to the traditional method of building an auxiliary disassembly and assembly platform for disassembling and assembling the pump pool structure, this significantly simplifies operations and improves the operational efficiency of the LNG refueling station. Furthermore, when locked in the second position, the functional panel 28 is perpendicular to the platform body 21, forming a protective guardrail structure and enhancing safety. On the other hand, since the platform body 21, the unloading skid 22, and the gas dispenser 23 constitute the integrated module 2, the overall size of the integrated module 2 meets the height and width restrictions of the planned transportation route. In specific applications, the configuration can be selected according to the planned transportation route and design requirements, without further specific limitations. Therefore, the integrated module 2 can be transported as a whole, greatly reducing transportation costs, which in turn reduces the construction cost of the natural gas refueling station. At the same time, the unloading skid 22 has a second module interface 221 that can be detachably connected to the first module interface 121 on the pump skid 12 of the tank skid structure 1. On the construction site, it can be connected through the first module interface 121 and the second module interface 221. The installation and removal operations are very convenient, saving the cumbersome on-site installation process and effectively improving the construction efficiency of the natural gas refueling station.

[0084] In some specific implementation schemes, the aforementioned functional panel 28 can be hinged to the platform body 21. The platform body 21 can be designed as an assembled frame structure, but is not limited to this. The platform body 21 and the functional panel 28 are locked in position via a locking mechanism. This locking mechanism can be, but is not limited to, a locking pin lug engaging a locking pin shaft. In practical applications, any structure capable of achieving position locking is acceptable, and no further specific limitations are made here. The hinge-locking mechanism makes switching and locking the functional panel 28 between the first and second positions more convenient.

[0085] It is understandable that the above-mentioned method of locking the position by means of hinge connection and locking mechanism is only an example of the embodiment of this application. In actual application, the functional plate 28 can also be designed as a protective plate that can be installed at different positions of the platform body 21. For example, when the protective plate is inserted vertically into the platform body 21, the functional plate 28 realizes the protective function. When the protective plate is placed flat in the corresponding area of ​​the platform body 21, it constitutes the function of maintaining the platform, such as forming a foot pedal for operating the platform.

[0086] In some specific implementations, the platform structure described above may further include a drive mechanism connected between the functional panel 28 and the platform body 21. This drive mechanism is used to drive the functional panel 28 to switch back and forth between a first position and a second position. Specifically, but not limited to, this drive mechanism may be designed as an electric actuator or a gear-driven structure connected to the flipping shaft of the functional panel 28. By designing the aforementioned drive mechanism, the operation of flipping and switching the position of the functional panel 28 becomes more convenient.

[0087] In some other specific implementation schemes, refer to Figure 1 The platform structure may also include an explosion-proof air compressor 24, an air buffer tank 25, an explosion-proof control cabinet 26, an air dryer 27, and an integrated canopy for covering the gas dispenser 23, all mounted on the platform body 21. By integrating the above equipment into the integrated module 2, the on-site installation process and operation can be further simplified, which helps to improve construction efficiency.

[0088] Among them, the explosion-proof control cabinet 26 is the "brain" and "nerve center" of the entire skid. It has many functions such as centralized control, safety interlocking, and status display.

[0089] Centralized control: It receives signals from equipment such as unloading skids, pressurizers (boosters), storage tanks, and gas dispensers, enabling automatic control and monitoring of the entire gas station's process. Operators can complete unloading, pre-cooling, and pressurization processes with a single click.

[0090] Safety interlock: This is its most critical function. When the system detects danger signals such as abnormal pressure, leakage, or emergency shutdown, the control cabinet will immediately shut off the relevant valves and stop the equipment operation to ensure the safety of the station area.

[0091] Status display: All key parameters such as pressure, temperature, liquid level, and equipment status are displayed in real time via touch screen or indicator lights.

[0092] Because it is installed in the process equipment area, which is an explosion hazard zone, it must be equipped with an explosion-proof structure to prevent accidents caused by electrical sparks.

[0093] The explosion-proof air compressor 24, the air dryer 27, and the air buffer tank 25 constitute a complete instrument air system, which is the "muscle" and "power source" for the station's automated operation.

[0094] Overall function: Produces clean, dry compressed air (referred to as "instrument air") to power all pneumatic valves and actuators.

[0095] Division of labor for each component:

[0096] Explosion-proof air compressor 24: Power source. Responsible for compressing ambient air to increase pressure. It must be explosion-proof, for the same reasons as the explosion-proof control cabinet.

[0097] Air Dryer 27: Purification Unit. Removes moisture and oil from compressed air. This is a crucial step because moisture can freeze in cold weather, clogging or damaging pneumatic lines and causing control system malfunctions.

[0098] Air Buffer Tank 25: Air Storage and Pressure Stabilization Unit. Stores compressed air and balances system pressure fluctuations. When multiple pneumatic valves operate simultaneously requiring a large amount of gas, the buffer tank can supply air instantly, avoiding frequent start-stop of the air compressor and ensuring stable pressure.

[0099] Workflow: Explosion-proof air compressor 24 → Air dryer → Air buffer tank 25 → Clean and dry instrument air pipeline network → Drive various pneumatic valves.

[0100] The integrated canopy primarily provides protection and signage for the gas dispenser and operating area.

[0101] It should also be noted that the location of the air buffer tank 25 on the platform body 21 can be selected according to actual needs.

[0102] For example, the air buffer tank 25 can be specifically set on the upper plane of the platform body 21, or it can be designed on the lower plane of the platform body 21 (such as the space between the upper and lower planes of the platform body 21).

[0103] In some other specific implementation schemes, refer to Figure 2 and Figure 3 The aforementioned unloading skid 22 has an unloading booster 222, which can be installed on either the upper or lower plane of the platform body 21. In practical applications, the configuration can be selected according to actual needs, and no further specific limitations are made here.

[0104] For example, there are multiple unloading boosters 222, arranged in a split parallel configuration. These multiple unloading boosters 222 can be designed to be laid side-by-side on the upper or lower plane of the platform body 21. This structural design makes the platform body 21 of the integrated module 2 more flattened, increasing the number of unloading skid mounting positions and the available unloading locations.

[0105] In some other specific implementation schemes, refer to Figure 2 The location of the gas filling pipeline 230 of the gas dispenser 23 can also be selected and arranged according to actual needs. For example, the gas filling pipeline 230 can be set between the upper and lower planes of the platform body 21.

[0106] On the other hand, this application also provides an LNG refueling station, including the platform structure described in any of the above solutions. Since the aforementioned platform structure has the above-mentioned technical effects, the LNG refueling station with this platform structure should also have the corresponding technical effects, which will not be elaborated further here.

[0107] In a further implementation plan, refer to Figure 4 and Figure 5 The aforementioned LNG refueling station may also include an internal dike 3 located at the installation site and a tank skid concrete foundation 4 located within the internal dike 3. The tank skid structure 1 is located within the tank skid concrete foundation 4, and the tank skid structure 1 specifically includes a vertical storage tank 11 and a pump skid 12. The platform body 21 is located within the internal dike 3. By designing the dike structure, the LNG refueling station possesses a passive but crucial safety barrier. It does not actively prevent leaks, but in the event of a worst-case leak, it can control the consequences within a manageable range, serving as the last physical barrier to prevent catastrophic accidents and directly impacting the safety of personnel, property, and the environment in and around the station area.

[0108] In a further implementation plan, refer to Figure 4 and Figure 5 The aforementioned integrated module 2 can be installed on one side of the cofferdam 3 within the station, with the tank skid concrete foundation 4 arranged adjacent to the integrated module 2 and positioned close to the center of the integrated module 2. This design makes more rational use of the overall space, helps to reduce the overall footprint of the natural gas filling station, and also provides more maintenance space for the tank skid structure 1.

[0109] Specifically, the integrated module 2 (such as the gas dispenser 23) is installed within the cofferdam 3 inside the station, and the tank skid structure 1 (integrated with the vertical storage tank 11 and the pump skid 12) is installed on the tank skid's concrete foundation 4. This can reduce the footprint, reduce pipeline length, reduce pipeline bends, reduce construction time, and improve construction efficiency; furthermore, shorter pipelines and fewer bends can reduce medium cooling loss and lower medium flow resistance.

[0110] Among them, liquefied natural gas (LNG) refueling stations suffer from significant cooling losses, which directly affect the filling capacity, driving range, and operating costs of refueling vehicles through changes in the medium's state and a decrease in system efficiency. The specific impacts are as follows:

[0111] 1. The amount of liquid added is "artificially high," resulting in a shorter actual driving mileage.

[0112] LNG is liquid at low temperatures (approximately -162°C). Cooling losses cause some of the liquid LNG to vaporize upon heating, forming a gas-liquid mixture. The vehicle's storage tank's rated volume is calculated based on liquid LNG. When the refueling machine fills the tank with this gas-liquid mixture, although the flow meter may show the rated volume, the actual mass of liquid LNG is reduced (for the same volume, the mass of gaseous LNG is only about 1 / 600th of that of liquid LNG). This can result in the vehicle appearing fully filled, but due to insufficient usable liquid LNG, the driving range is reduced by 10%-30% compared to normal conditions (the exact percentage depends on the degree of cooling loss).

[0113] 2. The vehicle's dynamic stability has decreased, posing a safety hazard.

[0114] LNG vehicles rely on natural gas, the vaporized form of liquefied LNG, for their engines. If the refueling station suffers excessive cooling losses, resulting in a high proportion of gaseous LNG being added to the vehicle's tank, the pressure inside the tank can rise rapidly. On one hand, this can cause vapor lock during vehicle operation, leading to unstable engine air supply and problems such as power fluctuations and idling vibrations. On the other hand, if the tank pressure exceeds a safety threshold, the safety valve will automatically release pressure, wasting natural gas and potentially creating a low-temperature zone near the pressure relief port, posing a risk of frostbite to personnel and equipment.

[0115] 3. Increased vehicle operating costs reduce the economic viability of LNG.

[0116] Users typically pay for LNG refueling in cubic meters or kilograms. The cooling loss resulting in a mixture of gas and liquid during refueling essentially means users are paying the same price for gaseous LNG as for liquid LNG. For example, if cooling loss causes 10% of the liquid LNG to vaporize, for every 100kg of LNG added, the user only receives 90kg of liquid LNG, effectively paying an extra 10% in cost. Long-term use of this will significantly increase vehicle operating costs and diminish the economic advantage of LNG compared to diesel and gasoline.

[0117] Liquefied natural gas (LNG) has high flow resistance, which can directly affect the operational stability of cryogenic submersible pumps and the filling accuracy of dispensers by increasing equipment load and disrupting the medium's state. In severe cases, it may lead to equipment failure or safety risks. The specific impacts are as follows:

[0118] 1. Impact on cryogenic submersible pumps: overload and shortened lifespan.

[0119] Cryogenic submersible pumps are the core power source for LNG transportation; increased flow resistance will cause them to operate under "over-condition" conditions for extended periods.

[0120] Motor overload and soaring energy consumption: To overcome greater pipeline resistance (such as excessively long pipelines, too many bends, or undersized pipe diameters), the pump motor needs to output higher power, causing the current to exceed the rated value. Long-term overload will lead to increased heating of the motor windings and accelerated aging of the insulation layer, not only increasing energy consumption by 10%-20%, but also potentially causing motor burnout.

[0121] Increased risk of cavitation: Excessive resistance can cause a sudden drop in pressure at the pump inlet. When the pressure falls below the saturated vapor pressure of LNG at the current temperature, the liquid LNG will prematurely vaporize and form bubbles (i.e., "cavitation"). When the bubbles burst in the high-pressure zone inside the pump, they will generate impact, damaging the impeller surface, causing pump vibration and increased noise. At the same time, the flow rate and head will fluctuate significantly, and in severe cases, the pump will be unable to deliver liquid normally.

[0122] Accelerated mechanical wear: Increased resistance causes the pump's rotor, bearings, and other moving parts to bear greater axial and radial forces. The lubrication effect will decrease due to excessive load, and the wear rate between parts will accelerate, resulting in a shorter pump maintenance cycle and a significant increase in the failure rate.

[0123] 2. Impact on the dispensing machine: Decreased filling accuracy and metering distortion.

[0124] The LNG dispenser measures the amount of LNG being filled using a flow meter. High flow resistance can directly interfere with its metering and control logic.

[0125] Flow fluctuations and inaccurate metering: Unstable resistance can cause the LNG flow rate into the dispenser to fluctuate greatly, while the dispenser's flow meter is highly dependent on a stable flow field. Flow fluctuations can cause metering errors to exceed the standard range, potentially leading to situations such as "overcharging" (users pay but the actual amount dispensed is insufficient) or "undercharging" (gas station incurring losses), causing operational disputes.

[0126] Slower dispensing speed and timed shutdown: To ensure filling safety, the dispenser has maximum pressure and flow rate limits. When excessive resistance causes the actual flow rate to fall below the set value, the dispensing time will be significantly extended. Some dispensers will also automatically shut down due to "timed filling," triggering a protection mechanism that affects dispensing efficiency and user experience.

[0127] Valve and seal damage: Components such as shut-off valves and check valves inside the LNG dispenser need to operate under stable pressure. Excessive resistance can cause pressure fluctuations that frequently impact the valve core and gaskets, reducing their sealing performance and potentially leading to LNG leakage or valve jamming.

[0128] In some other specific implementation schemes, refer to Figure 4 and Figure 5 , combined Figure 6 and Figure 7As shown, the aforementioned tank skid structure 1 includes a vertical storage tank 11, a pump skid 12, and a lifting bracket 13. The pump skid 12 is integrated into the bottom of the vertical storage tank 11. The outer frame of the pump skid 12 is a square frame structure 120, which surrounds the bottom of the vertical storage tank 11. The length and width dimensions of the square frame structure 120 meet the height and width restrictions of the planned transportation route. For example, the length × width of the square frame structure 120 can be 3.2 meters × 3.2 meters. In specific applications, the configuration can be selected according to the planned transportation route and design requirements, and no further specific limitations are made here. The lifting bracket 13 is located within the enclosed space of the square frame structure 120 and is arranged adjacent to the pump pool structure 123. The submersible pump 1230 inside the pump pool structure 123 can be lifted using the lifting bracket 13.

[0129] Specifically, the lifting bracket 13 can be installed on the outer wall of the vertical liquid storage tank 11; or, the lifting bracket 13 can be installed on the support leg 110 of the vertical liquid storage tank 11; or, the lifting bracket 13 can be installed on the frame structure 120. In actual application, the design on the corresponding structure can be selected according to the actual layout space and needs, and no further specific limitations are made here.

[0130] In some more specific implementation plans, refer to Figure 7 Combination Figure 8 As shown, the aforementioned hoisting bracket 13 may specifically include a fixed part 131 and a rotating part 132. The fixed part 131 is disposed on the outer wall of the vertical storage tank 11, on the legs 110 of the vertical storage tank 11, or on the square frame structure 120. The rotating part 132 includes a vertical beam 1321 and a horizontal beam 1322 disposed transversely on the vertical beam 1321. The vertical beam 1321 is rotatably disposed above the fixed part 131. The horizontal beam 1322 is provided with a sliding part 1323 for the hoisting rope to pass through. This sliding part 1323 may specifically be a slip ring or pulley, through which the hoisting rope can pass. Furthermore, to enhance the structural strength between the vertical beam 1321 and the horizontal beam 1322, a diagonal brace 1324 may be designed between them. Furthermore, the fixing part 131 and the rotating part 132 can be specifically designed with a plug-in rotating structure. For example, the fixing part 131 can be designed as a tube, and the rotating part 132 can be designed as a rod or tube plugged into the fixing part 131. In addition, at least one of the vertical beam 1321 of the fixing part 131 and the rotating part 132 can be designed as a lifting structure.

[0131] In a further implementation plan, refer to Figure 7 and Figure 8As shown, one of the aforementioned fixing part 131 and vertical beam 1321 can be provided with a corner limiting groove 133, and the other can be provided with a sliding protrusion 134 that slides and adapts to the corner limiting groove 133. By designing the aforementioned corner limiting groove 133 and sliding protrusion 134, the relative rotation angle between the fixing part 131 and the rotating part 132 can be limited, thereby making it easier to disassemble and maintain the submersible pump 1230.

[0132] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0133] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0134] In the description of the embodiments of this application, unless otherwise stated, " / " means "or", for example, A / B can mean A or B; "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more.

[0135] It should also be noted that in the description of the embodiments of this application, the terms "first" and "second" are used only for the purpose of distinguishing descriptions and should not be construed as indicating or implying relative importance, nor should they be construed as indicating or implying order.

[0136] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A platform structure for an LNG container module, characterized in that, include: The platform body (21) is arranged adjacent to the tank skid structure (1) of the LNG refueling station and has a functional plate (28). The functional plate (28) is set on the platform body (21) in the area adjacent to the pump pool structure (123) of the tank skid structure (1). The functional plate (28) can switch between a first position and a second position and lock the position. When the functional plate (28) is locked in the first position, the functional plate (28) is flush with the plane of the platform body (21) to provide an operating platform for the hoisting and maintenance of the pump pool structure (123). When the functional plate (28) is locked in the second position, the functional plate (28) is perpendicular to the platform body (21). The unloading skid (22) and the gas dispenser (23) are installed on the platform body (21). The gas dispenser (23) and the unloading skid (22) are arranged side by side on the platform body (21), and the gas dispenser (23) is installed on one or both sides of the unloading skid (22). The platform body (21), the unloading skid (22) and the gas dispenser (23) constitute an integrated module (2). The overall size of the integrated module (2) meets the height and width restrictions of the planned transportation route. The unloading skid (22) has a second module interface (221) that is detachably connected to the first module interface (121) on the pump skid (12) of the tank skid structure (1).

2. The platform structure of the LNG container module as described in claim 1, characterized in that, The functional panel (28) is connected to the platform body (21) by a hinge, and the platform body (21) and the functional panel (28) are locked in position by a locking mechanism.

3. The platform structure of the LNG container module as described in claim 1, characterized in that, It also includes a drive mechanism connected between the functional board (28) and the platform body (21), the drive mechanism being used to drive the functional board (28) to switch back and forth between the first position and the second position.

4. The platform structure of the LNG container module as described in claim 1, characterized in that, It also includes an explosion-proof air compressor (24), an air buffer tank (25), an explosion-proof control cabinet (26), an air dryer (27), and an integrated canopy for covering the gas dispenser (23) and installed on the platform body (21).

5. The platform structure of the LNG container module as described in claim 4, characterized in that, The air buffer tank (25) is located on the upper or lower plane of the platform body (21).

6. The platform structure of the LNG container module as described in claim 1, characterized in that, The unloading skid (22) has an unloading booster (222), which is located on the upper or lower plane of the platform body (21).

7. The platform structure of the LNG container module as described in claim 6, characterized in that, The number of unloading boosters (222) is multiple, and they are arranged in parallel in a split manner; Among them, multiple unloading boosters (222) are arranged side by side on the upper or lower plane of the platform body (21).

8. The platform structure of the LNG container module as described in claim 1, characterized in that, The gas filling pipeline (230) of the gas filling machine (23) is located between the upper and lower planes of the platform body (21).

9. An LNG refueling station, characterized in that, The platform structure includes any one of claims 1-8.

10. The LNG refueling station as described in claim 9, characterized in that, It also includes a station cofferdam (3) set at the installation site and a tank skid cement foundation (4) set in the station cofferdam (3). The tank skid structure (1) is set in the tank skid cement foundation (4), and the platform body (21) is set in the station cofferdam (3).

11. The LNG refueling station as described in claim 9, characterized in that, The platform body (21) is located on one side of the cofferdam (3) inside the station. The cement foundation (4) of the tank skid is arranged adjacent to the platform body (21) and is located near the middle of the platform body (21).

12. The LNG refueling station as described in claim 9, characterized in that, The tank skid structure (1) includes a vertical liquid storage tank (11), a pump skid (12) and a hoisting bracket (13). The pump skid (12) is integrated into the bottom of the vertical liquid storage tank (11). The outer frame of the pump skid (12) is a square frame structure (120), and the square frame structure (120) surrounds the bottom of the vertical liquid storage tank (11). The hoisting bracket (13) is located within the enclosed space of the frame structure (120) and is arranged adjacent to the pump pool structure (123). The submersible pump (1230) in the pump pool structure (123) can be hoisted through the hoisting bracket (13).

13. The LNG refueling station as described in claim 12, characterized in that, The hoisting bracket (13) is installed on the outer wall of the vertical storage tank (11); Alternatively, the hoisting bracket (13) may be mounted on the support leg (110) of the vertical storage tank (11); Alternatively, the hoisting bracket (13) may be mounted on the frame structure (120).

14. The LNG refueling station as described in claim 12, characterized in that, The hoisting bracket (13) includes a fixed part (131) and a rotating part (132); The fixing part (131) is provided on the outer wall of the vertical liquid storage tank (11), the support leg (110) of the vertical liquid storage tank (11), or the square frame structure (120); the rotating part (132) includes a vertical beam (1321) and a horizontal beam (1322) arranged horizontally on the vertical beam (1321). The vertical beam (1321) is rotatably arranged above the fixing part (131), and the horizontal beam (1322) is provided with a sliding part (1323) for the hoisting rope to pass through.

15. The LNG refueling station as described in claim 14, characterized in that, One of the fixing part (131) and the vertical beam (1321) is provided with a corner limiting groove (133), and the other is provided with a sliding protrusion (134) that is slidably adapted to the corner limiting groove (133).

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