LNG (Liquefied Natural Gas) dispenser based on modular process pipeline and modular processing method

Abstract

The invention relates to the technical field of LNG (liquefied natural gas) filling machines, aims to solve the problems that in the prior art, the production cycle is long, the construction space is narrow, the production efficiency is low, the production quality is poor, the heat preservation quality is poor, and the stocking cost is easily increased due to advanced stocking, and provides an LNG filling machine based on a modular process pipeline and a modular machining method. A modular control system and a modular process pipeline are arranged in the machine shell, the modular control system is fixedly connected to the inner top of the machine shell, and the modular process pipeline is fixedly connected to the inner bottom of the machine shell; scattered accessories are arranged on the outer wall of the machine shell and communicated with the modular process pipeline. The method has the beneficial effects of being short in production period, large in construction space, high in production efficiency, good in production quality, good in heat preservation quality and capable of reducing the stocking cost.

Description

Technical Field

[0001] The present invention relates to the technical field of LNG dispensers, and more specifically, to an LNG dispenser based on a modular process pipeline and a modular processing method. Background Art

[0002] Liquefied natural gas (LNG) dispensers, as the main refueling equipment for LNG, are already very mature products in the industry. At present, the process pipelines of this product are all completed by piece-by-piece welding. In addition, the prerequisite for welding is that the dispenser housing must be completed before subsequent assembly work can be carried out. The production cycle is relatively long. Since traditional piece-by-piece welding is carried out inside the dispenser housing, the construction space is narrow, which not only affects production efficiency but also production quality. It is necessary to prepare goods in advance, greatly increasing the stocking cost. Summary of the Invention

[0003] The present invention aims to provide an LNG dispenser based on a modular process pipeline and a modular processing method to solve the problems of long production cycle, narrow construction space, low production efficiency, poor production quality, poor heat preservation quality and easy increase of stocking cost in the prior art.

[0004] Embodiments of the present invention are implemented as follows:

[0005] An embodiment of the present invention provides an LNG dispenser based on a modular process pipeline, which includes a housing;

[0006] A modular control system and a modular process pipeline are arranged inside the housing. The modular control system is fixedly connected to the inner top of the housing, and the modular process pipeline is fixedly connected to the inner bottom of the housing;

[0007] Scattered accessories are arranged on the outer wall of the housing, and the scattered accessories are communicated with the modular process pipeline.

[0008] An LNG dispenser based on a modular process pipeline disclosed in this embodiment, because the modular control system and the modular process pipeline are prefabricated in advance, after the housing returns to the factory, the modular control system and the modular process pipeline are connected and assembled with the housing in a small amount to complete the production, thus making an LNG dispenser based on a modular process pipeline have the beneficial effects of short production cycle, large construction space, high production efficiency, good production quality, good heat preservation quality and reduced stocking cost.

[0009] Optionally: The modular process pipeline has an integrated seat, and the integrated seat is fixedly connected to the inner bottom of the housing.

[0010] With such a setting, the above-mentioned integrated base has a bearing capacity, which is convenient for bearing the above-mentioned modular process pipeline, making the above-mentioned modular process pipeline too high to avoid contact with the ground, thereby avoiding being eroded by water, and at the same time facilitating the layout of each component.

[0011] Optionally: A liquid-phase bare pipe and a gas-phase bare pipe are provided on the above-mentioned integrated base, and both the liquid-phase bare pipe and the gas-phase bare pipe are fixedly connected to the above-mentioned integrated base.

[0012] With such a setting, the above-mentioned liquid-phase bare pipe can conduct liquid natural gas, and the liquid natural gas is input into the on-vehicle gas storage steel tank through the above-mentioned liquid-phase bare pipe. The above-mentioned gas-phase bare pipe can recover natural gas, and the natural gas in the on-vehicle gas storage steel tank is recovered through the above-mentioned gas-phase bare pipe and returned to the tank for storing liquid natural gas, meeting the process requirements of the gas filling cycle.

[0013] Optionally: A vacuum pipe is connected between the other end of the above-mentioned liquid-phase bare pipe and the other end of the above-mentioned gas-phase bare pipe. The vacuum pipe has a liquid inlet pipe and a gas return pipe. The liquid inlet pipe is communicated with the above-mentioned liquid-phase bare pipe, and the gas return pipe is communicated with the above-mentioned gas-phase bare pipe.

[0014] With such a setting, the above-mentioned liquid inlet pipe facilitates the liquid natural gas to enter the above-mentioned liquid-phase bare pipe through the above-mentioned liquid inlet pipe, thereby facilitating the filling of the on-vehicle gas storage steel tank, and the above-mentioned gas return pipe facilitates the recovery of the gas in the on-vehicle gas storage steel tank into the tank for storing liquid natural gas.

[0015] Optionally: The bottom end of the above-mentioned liquid inlet pipe has a liquid inlet flange, and the bottom end of the above-mentioned gas return pipe has a gas return flange.

[0016] With such a setting, the above-mentioned liquid inlet flange is connected to the tank for storing liquid natural gas through a skid-mounted device, and the above-mentioned gas return flange is directly connected to the tank for storing liquid natural gas, which is convenient for disassembly and assembly and can achieve sealing at the same time.

[0017] Optionally: A valve assembly is provided at the top of the above-mentioned vacuum pipe. The valve assembly is communicated with the above-mentioned liquid-phase bare pipe, the above-mentioned gas-phase bare pipe and the above-mentioned scattered accessories.

[0018] With such a setting, the above-mentioned valve assembly is used to ensure the safety of the operation of the above-mentioned liquid-phase bare pipe and the above-mentioned gas-phase bare pipe, and avoid safety accidents.

[0019] Optionally: The above-mentioned liquid-phase bare pipe has a liquid outlet. A thermal insulation vacuum valve and a liquid-phase flowmeter are provided between the liquid outlet and the above-mentioned liquid inlet pipe. The thermal insulation vacuum valve is hermetically connected to the above-mentioned liquid-phase bare pipe and is close to the liquid outlet. The two ends of the liquid-phase flowmeter are flange-connected to the above-mentioned liquid-phase bare pipe and are close to the liquid inlet pipe;

[0020] An outlet connection pipe is provided on the outside of the above-mentioned casing close to the liquid outlet. One end of the outlet connection pipe close to the liquid outlet is communicated with the liquid outlet.

[0021] Set as such, the liquefied natural gas enters from the above-mentioned liquid inlet pipe, flows through the above-mentioned liquid-phase flowmeter and the above-mentioned heat-insulating vacuum valve, and then flows into the above-mentioned liquid outlet pipe from the above-mentioned liquid outlet, and the liquefied natural gas is introduced into the on-vehicle gas storage steel tank through the pipeline on the above-mentioned liquid outlet pipe.

[0022] Optionally: the above-mentioned gas-phase bare pipe has a gas return port, and a check valve and a gas return flowmeter are provided between the above-mentioned gas return port and the above-mentioned gas return pipe. The above-mentioned check valve is hermetically connected to the above-mentioned gas-phase bare pipe and is close to the above-mentioned gas return port. The two ends of the above-mentioned gas return flowmeter are flange-connected to the above-mentioned gas-phase bare pipe and are close to the above-mentioned gas return pipe;

[0023] A gas return pipe is provided on the outside of the above-mentioned machine shell close to the above-mentioned gas return port, and one end of the above-mentioned gas return pipe close to the above-mentioned gas return port communicates with the above-mentioned gas return port.

[0024] Set as such, the excess gas in the on-vehicle gas storage steel tank enters the above-mentioned gas return pipe through the pipeline, and the gas entering the above-mentioned gas return pipe sequentially passes through the above-mentioned gas return port, the above-mentioned check valve and the above-mentioned gas return flowmeter and is introduced into the tank storing the liquefied natural gas from the above-mentioned gas return pipe.

[0025] Optionally: heat-insulating layers are provided on the outside of the above-mentioned liquid-phase bare pipe and the above-mentioned gas-phase bare pipe.

[0026] Set as such, the above-mentioned heat-insulating layer can wrap the above-mentioned liquid-phase bare pipe and the above-mentioned gas-phase bare pipe, which is convenient for heat-insulating 95% of the above-mentioned liquid-phase bare pipe and the above-mentioned gas-phase bare pipe, greatly reducing the occurrence of frosting on the process pipeline of the gas dispenser. The heat-insulating effect is good, and the above-mentioned heat-insulating layer can be conveniently opened during maintenance, and the pipeline can be wrapped again after the maintenance is completed.

[0027] In an implementation manner of this embodiment: a modular processing method for an LNG gas dispenser based on a modular process pipeline is further provided, including the following steps:

[0028] Step 1, stock up the above-mentioned vacuum pipe and the above-mentioned integrated seat in advance;

[0029] Step 2, start production, and at the same time prefabricate the above-mentioned liquid-phase bare pipe, the above-mentioned gas-phase bare pipe and the above-mentioned modular control system. Different above-mentioned liquid-phase bare pipes are selected according to the lengths of the above-mentioned liquid-phase flowmeters of different brands, and different above-mentioned gas-phase bare pipes are selected according to the lengths of the above-mentioned gas return flowmeters of different brands. The above-mentioned vacuum pipe is connected between the above-mentioned liquid-phase bare pipe and the above-mentioned gas-phase bare pipe, and finally the above-mentioned modular process pipeline is formed;

[0030] Step 3, fix the above-mentioned modular process pipeline on the above-mentioned integrated seat;

[0031] Step 4, after all the pipelines are connected, cover the above-mentioned liquid-phase bare pipe and the above-mentioned gas-phase bare pipe with the above-mentioned heat-insulating layer;

[0032] Step Five: Complete the prefabrication stage of the process pipeline. To meet the production delivery date, store the prefabricated modular process pipeline and the modular control system as described above.

[0033] Step Six: After the above-mentioned casing returns to the factory, install the combination of the modular process pipeline and the integrated seat below the casing and fix it firmly. Install the modular control system above the casing.

[0034] Step Seven: Connect the scattered accessories to the valve assembly in the modular process pipeline through threaded unions to complete production.

[0035] Based on the above description, a modular process pipeline-based LNG dispenser and a modular processing method disclosed by the present invention have the beneficial effects of short production cycle, large construction space, high production efficiency, good production quality, good heat preservation quality, and reduced stocking cost. Description of the Drawings

[0036] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0037] Figure 1 It is a three-dimensional perspective view of an LNG dispenser based on a modular process pipeline in an embodiment of the present invention;

[0038] Figure 2 It is a front view of an LNG dispenser based on a modular process pipeline in an embodiment of the present invention;

[0039] Figure 3 It is a three-dimensional perspective view of the connection between the liquid-phase bare pipe and the gas-phase bare pipe in an embodiment of the present invention;

[0040] Figure 4 It is a rear view of the connection between the liquid-phase bare pipe and the gas-phase bare pipe in an embodiment of the present invention;

[0041] Figure 5 It is a three-dimensional perspective view of the modular process pipeline in an embodiment of the present invention;

[0042] Figure 6 It is a rear view of the modular process pipeline in an embodiment of the present invention.

[0043] Icon: 1 - Housing, 2 - Modular control system, 3 - Modular process pipeline, 4 - Scattered accessories, 5 - Integrated base, 6 - Liquid-phase bare pipe, 7 - Gas-phase bare pipe, 8 - Vacuum pipe, 9 - Liquid inlet pipe, 10 - Return gas pipe, 11 - Liquid inlet flange, 12 - Return gas flange, 13 - Valve assembly, 14 - Liquid outlet, 15 - Thermal insulation vacuum valve, 16 - Liquid-phase flowmeter, 17 - Liquid outlet connection pipe, 18 - Return gas port, 19 - Check valve, 20 - Return gas flowmeter, 21 - Return gas connection pipe, 22 - Thermal insulation layer. Detailed implementation manners

[0044] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0045] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0046] Embodiment

[0047] Refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 , this embodiment provides an LNG dispenser based on a modular process pipeline, including a housing 1;

[0048] Inside the housing 1, there are a modular control system 2 and a modular process pipeline 3. The modular control system 2 is fixedly connected to the inner top of the housing 1, and the modular process pipeline 3 is fixedly connected to the inner bottom of the housing 1;

[0049] On the outer wall of the housing 1, there are scattered accessories 4, and the scattered accessories 4 communicate with the modular process pipeline 3.

[0050] An LNG dispenser based on a modular process pipeline disclosed in this implementation manner, due to the adoption of prefabricated modular control system 2 and modular process pipeline 3 in advance, after the housing 1 returns to the factory, only a small amount of connection and assembly between the modular control system 2 and the modular process pipeline 3 and the housing 1 is required to complete the production. Furthermore, an LNG dispenser based on a modular process pipeline has the beneficial effects of short production cycle, large construction space, high production efficiency, good production quality, good thermal insulation quality and reduced stocking cost.

[0051] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown in ,

[0051] , Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 , the modular process pipeline 3 has an integrated base 5 which is fixedly connected to the inner bottom of the machine casing 1. The integrated base 5 has a load-bearing capacity, facilitating the load-bearing of the modular process pipeline 3, making the modular process pipeline 3 high enough to avoid contact with the ground and thus being eroded by water, and at the same time facilitating the layout of each component.

[0052] The integrated base 5 is provided with a liquid-phase bare pipe 6 and a gas-phase bare pipe 7. Both the liquid-phase bare pipe 6 and the gas-phase bare pipe 7 are fixedly connected to the integrated base 5. The liquid-phase bare pipe 6 can conduct liquid natural gas, and the liquid natural gas is input into the on-vehicle gas storage steel tank through the liquid-phase bare pipe 6. The gas-phase bare pipe 7 can recover natural gas, and the natural gas in the on-vehicle gas storage steel tank is recovered through the gas-phase bare pipe 7 and returned to the tank for storing liquid natural gas, realizing the process requirements of the gas filling cycle.

[0053] A vacuum pipe 8 is connected between the other end of the liquid-phase bare pipe 6 and the other end of the gas-phase bare pipe 7. The vacuum pipe 8 has a liquid inlet pipe 9 and a gas return pipe 10. The liquid inlet pipe 9 communicates with the liquid-phase bare pipe 6, and the gas return pipe 10 communicates with the gas-phase bare pipe 7. The liquid inlet pipe 9 facilitates the liquid natural gas to enter the liquid-phase bare pipe 6 through the liquid inlet pipe 9, thereby facilitating the filling of the on-vehicle gas storage steel tank, while the gas return pipe 10 facilitates the recovery of the gas in the on-vehicle gas storage steel tank into the tank for storing liquid natural gas.

[0054] The bottom end of the liquid inlet pipe 9 has a liquid inlet flange 11, and the bottom end of the gas return pipe 10 has a gas return flange 12. The liquid inlet flange 11 is connected to the tank for storing liquid natural gas through skid-mounted equipment, and the gas return flange 12 is directly connected to the tank for storing liquid natural gas, facilitating disassembly and assembly and being able to achieve sealing at the same time.

[0055] A valve assembly 13 is provided at the top of the vacuum pipe 8. The valve assembly 13 communicates with the liquid-phase bare pipe 6, the gas-phase bare pipe 7 and the scattered accessories 4. The valve assembly 13 is used to ensure the safety of the operation of the liquid-phase bare pipe 6 and the gas-phase bare pipe 7 and avoid safety accidents.

[0056] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 , the liquid-phase bare pipe 6 has a liquid outlet 14. A thermal insulation vacuum valve 15 and a liquid-phase flowmeter 16 are provided between the liquid outlet 14 and the liquid inlet pipe 9. The thermal insulation vacuum valve 15 is hermetically connected to the liquid-phase bare pipe 6 and is close to the liquid outlet 14. The two ends of the liquid-phase flowmeter 16 are flange-connected to the liquid-phase bare pipe 6 and are close to the liquid inlet pipe 9;

[0057] On the outer side of the casing 1 near the liquid outlet 14, there is a liquid outlet connecting pipe 17. One end of the liquid outlet connecting pipe 17 near the liquid outlet 14 is communicated with the liquid outlet 14. The liquefied natural gas enters from the liquid inlet pipe 9, flows through the liquid-phase flowmeter 16 and the heat-insulating vacuum valve 15, and then flows into the liquid outlet connecting pipe 17 from the liquid outlet 14. The liquefied natural gas is introduced into the on-vehicle gas storage steel cylinder through the pipeline on the liquid outlet connecting pipe 17.

[0058] The gas-phase bare pipe 7 has a gas return port 18. Between the gas return port 18 and the gas return pipe 10, there are a check valve 19 and a gas return flowmeter 20. The check valve 19 is hermetically connected to the gas-phase bare pipe 7 and is near the gas return port 18. The two ends of the gas return flowmeter 20 are flange-connected to the gas-phase bare pipe 7 and are near the gas return pipe 10;

[0059] On the outer side of the casing 1 near the gas return port 18, there is a gas return connecting pipe 21. One end of the gas return connecting pipe 21 near the gas return port is communicated with the gas return port. The redundant gas in the on-vehicle gas storage steel cylinder enters the gas return connecting pipe 21 through the pipeline. The gas entering the gas return connecting pipe 21 sequentially passes through the gas return port 18, the check valve 19 and the gas return flowmeter 20 and is introduced into the tank body storing the liquefied natural gas from the gas return pipe 10.

[0060] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 , heat-insulating layers 22 are provided on the outer sides of the liquid-phase bare pipe 6 and the gas-phase bare pipe 7. The heat-insulating layers 22 can wrap the liquid-phase bare pipe 6 and the gas-phase bare pipe 7, which is convenient for heat-insulating 95% of the liquid-phase bare pipe 6 and the gas-phase bare pipe 7, greatly reducing the occurrence of frosting on the process pipeline of the gas dispenser. The heat-insulating effect is good. When overhauling, the heat-insulating layer 22 can be conveniently opened, and the pipeline can be wrapped again after the overhaul is completed.

[0061] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 , in this embodiment, by simply disassembling some quick couplings, the integrated modular control system 2 and the modular process pipeline 3 are integrally assembled and taken out, and the prefabricated batch production of the process pipeline and the electric control system can be realized; the disadvantage of insufficient construction space in conventional production is solved.

[0062] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6, in this embodiment, the refueling principle of the LNG dispenser based on modular process pipelines: First, the liquefied natural gas in the tank enters the liquid-phase bare pipe 6 through the skid-mounted equipment from the liquid inlet flange 11 and the liquid inlet pipe 9. The liquefied natural gas flows through the liquid-phase flowmeter 16 and the thermal insulation vacuum valve 15, and the flow rate is calculated by the liquid-phase flowmeter 16. Second, the liquefied natural gas flows into the liquid outlet connection pipe 17 from the liquid outlet 14, and the vehicle-mounted storage gas tank is filled with liquefied natural gas through the pipeline connected to the liquid outlet connection pipe 17. Then, during the filling process, the gas in the vehicle-mounted storage gas tank is introduced into the return gas connection pipe 21 through the pipeline. The gas in the return gas connection pipe 21 sequentially passes through the return gas port 18, the one-way valve 19, and the return gas flowmeter 20, and the return gas flow rate is calculated by the return gas flowmeter 20. Finally, the gas flows back to the tank storing liquefied natural gas through the return gas pipe 10 and the return gas flange 12.

[0063] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 , in an implementation manner of this embodiment: A modular processing method for an LNG dispenser based on modular process pipelines is also provided, including the following steps:

[0064] Step 1, prepare the vacuum tube 8 and the integrated base 5 in advance;

[0065] Step 2, start production. At the same time, prefabricate the liquid-phase bare pipe 6, the gas-phase bare pipe 7, and the modular control system 2. Select different liquid-phase bare pipes 6 according to the lengths of liquid-phase flowmeters 16 of different brands, and select different gas-phase bare pipes 7 according to the lengths of return gas flowmeters 20 of different brands. Connect the vacuum tube 8 between the liquid-phase bare pipe 6 and the gas-phase bare pipe 7 to finally form the modular process pipeline 3;

[0066] Step 3, fix the modular process pipeline 3 on the integrated base 5;

[0067] Step 4, after all pipelines are connected, cover the liquid-phase bare pipe 6 and the gas-phase bare pipe 7 with the thermal insulation layer 22;

[0068] Step 5, complete the prefabrication stage of the process pipeline. To meet the production delivery date, store the prefabricated modular process pipeline 3 and the modular control system 2 well;

[0069] Step 6, after the machine shell 1 returns to the factory, install the combination of the modular process pipeline 3 and the integrated base 5 under the machine shell 1 and fix it firmly. Install the modular control system 2 above the machine shell 1;

[0070] Step 7, connect the scattered accessories 4 to the valve assembly 13 in the modular process pipeline 3 through the threaded union to complete the production.

[0071] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A modular process pipeline-based LNG dispenser, characterized in that: It includes a machine housing (1); Inside the machine housing (1), there is a modular control system (2) and a modular process pipeline (3). The modular control system (2) is fixedly connected to the inner top of the machine housing (1), and the modular process pipeline (3) is fixedly connected to the inner bottom of the machine housing (1); On the outer wall of the machine housing (1), there are scattered accessories (4), and the scattered accessories (4) communicate with the modular process pipeline (3).

2. The modular process pipeline-based LNG dispenser according to claim 1, characterized in that: The modular process pipeline (3) has an integrated seat (5), and the integrated seat (5) is fixedly connected to the inner bottom of the machine housing (1).

3. The modular process pipeline-based LNG dispenser according to claim 2, characterized in that: On the integrated seat (5), there are a liquid-phase bare pipe (6) and a gas-phase bare pipe (7), and both the liquid-phase bare pipe (6) and the gas-phase bare pipe (7) are fixedly connected to the integrated seat (5).

4. The modular process pipeline-based LNG dispenser according to claim 3, characterized in that: Between the other ends of the liquid-phase bare pipe (6) and the gas-phase bare pipe (7), there is a vacuum pipe (8). The vacuum pipe (8) has a liquid inlet pipe (9) and a return gas pipe (10). The liquid inlet pipe (9) communicates with the liquid-phase bare pipe (6), and the return gas pipe (10) communicates with the gas-phase bare pipe (7).

5. The modular process pipeline-based LNG dispenser according to claim 4, characterized in that: The bottom end of the liquid inlet pipe (9) has a liquid inlet flange (11), and the bottom end of the return gas pipe (10) has a return gas flange (12).

6. The modular process pipeline-based LNG dispenser according to claim 4, characterized in that: At the top of the vacuum pipe (8), there is a valve assembly (13), and the valve assembly (13) communicates with the liquid-phase bare pipe (6), the gas-phase bare pipe (7) and the scattered accessories (4).

7. The modular process pipeline-based LNG dispenser according to claim 4, characterized in that: The liquid-phase bare pipe (6) has a liquid outlet (14). Between the liquid outlet (14) and the liquid inlet pipe (9), there are a heat-insulating vacuum valve (15) and a liquid-phase flowmeter (16). The heat-insulating vacuum valve (15) is hermetically connected to the liquid-phase bare pipe (6) and is close to the liquid outlet (14). The two ends of the liquid-phase flowmeter (16) are flange-connected to the liquid-phase bare pipe (6) and are close to the liquid inlet pipe (9); Outside the machine housing (1) near the liquid outlet (14), there is a liquid outlet connection pipe (17), and one end of the liquid outlet connection pipe (17) near the liquid outlet (14) communicates with the liquid outlet (14).

8. The modular process pipeline-based LNG dispenser according to claim 4, characterized in that: The gas-phase bare pipe (7) has a gas return port (18). A one-way valve (19) and a gas return flowmeter (20) are provided between the gas return port (18) and the gas return pipe (10). The one-way valve (19) is hermetically connected to the gas-phase bare pipe (7) and is close to the gas return port (18). The two ends of the gas return flowmeter (20) are flange-connected to the gas-phase bare pipe (7) and are close to the gas return pipe (10). A gas return connection pipe (21) is provided on the outer side of the machine housing (1) close to the gas return port (18). One end of the gas return connection pipe (21) close to the gas return port (18) communicates with the gas return port (18).

9. The LNG dispenser based on a modular process pipeline according to claim 3, wherein: Heat insulation layers (22) are provided on the outer sides of the liquid-phase bare pipe (6) and the gas-phase bare pipe (7).

10. A modular processing method for a modular process pipeline LNG dispenser according to any one of claims 1 to 9, characterized in that: It includes the following steps: Step 1, stock up the vacuum pipe (8) and the integrated seat (5) in advance; Step 2, start production. At the same time, prefabricate the liquid-phase bare pipe (6), the gas-phase bare pipe (7) and the modular control system (2). Select different liquid-phase bare pipes (6) according to the lengths of the liquid flowmeters (16) of different brands, select different gas-phase bare pipes (7) according to the lengths of the gas return flowmeters (20) of different brands. Connect the vacuum pipe (8) between the liquid-phase bare pipe (6) and the gas-phase bare pipe (7) to finally form the modular process pipeline (3); Step 3, fix the modular process pipeline (3) on the integrated seat (5); Step 4, after all pipelines are connected, cover the liquid-phase bare pipe (6) and the gas-phase bare pipe (7) with the heat insulation layer (22); Step 5, complete the prefabrication stage of the process pipeline. To meet the production delivery date, store the prefabricated modular process pipeline (3) and the modular control system (2); Step 6, after the machine housing (1) returns to the factory, install the combination of the modular process pipeline (3) and the integrated seat (5) below the machine housing (1) and fix it firmly. Install the modular control system (2) above the machine housing (1); Step 7, connect the scattered accessories (4) to the valve assembly (13) in the modular process pipeline (3) through threaded unions to complete the production.

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