A high-flow CNG refueling system and refueling machine

Abstract

This utility model discloses a high-flow CNG refueling system and refueling machine, including a natural gas inlet pipeline, a refueling main pipeline, and a venting pipeline. Multiple natural gas inlet pipelines are connected to the refueling main pipeline, and the venting pipeline is connected to the refueling main pipeline through a safety valve. A refueling nozzle is installed at the end of the refueling main pipeline. The flow coefficient of the refueling nozzle and the refueling break-off valve in the refueling main pipeline is selected to be 3 or higher. The internal pipeline diameter in the refueling main pipeline is φ15~φ20. This solution, through the special selection of the refueling nozzle and its main pipeline, can increase the output flow rate of the entire pipeline per unit time, ensuring a high flow rate output. This can reduce refueling time and queuing time when multiple vehicles are refueling.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen refueling machine technology, and in particular to a high-flow CNG refueling system and refueling machine. Background Technology

[0002] Existing CNG refueling machines have insufficient flow rates when refueling vehicles, with the maximum flow rate generally less than 30 kg / min, and sometimes only around 20 kg / min. This results in excessively long refueling times, especially for large vehicles (such as trucks) due to their large onboard gas cylinders, typically 500-800 m³. 3 Converted to kg, this is 358.7~573.92kg (the mass of 1 cubic meter of natural gas under standard atmospheric pressure is approximately 0.7174kg). When multiple vehicles refuel, the long refueling time and queuing can lead to a poor user experience and even complaints, further exposing the problem of low refueling efficiency of CNG refueling machines.

[0003] On the other hand, existing gas dispensers often adopt an integrated design, which can lead to inconvenience in maintenance. Utility Model Content

[0004] The purpose of this utility model is to provide a high-flow CNG refueling system and refueling machine to address the above-mentioned shortcomings, thereby solving the problem of insufficient refueling flow in existing CNG refueling machines and addressing the problem of inconvenient maintenance caused by the common integrated design of existing refueling machines.

[0005] This utility model is achieved through the following solution: A high-flow-rate CNG refueling system includes a natural gas inlet pipeline, a refueling main pipeline, and a venting pipeline. Multiple natural gas inlet pipelines are connected to the refueling main pipeline, and the venting pipeline is connected to the refueling main pipeline via a safety valve. A refueling nozzle is installed at the end of the refueling main pipeline. The flow coefficient of the hydrogen refueling nozzle and the refueling disconnect valve in the refueling main pipeline is selected to be 3 or higher. The internal pipeline diameter in the refueling main pipeline is φ15~φ20.

[0006] Based on the structure of the above-mentioned high-flow CNG refueling system, there are three natural gas inlet pipelines, each with the same configuration. The natural gas inlet pipeline may include a manual shut-off valve, an automatic shut-off valve, and a check valve. The manual shut-off valve, the automatic shut-off valve, and the check valve are arranged sequentially along the natural gas flow direction and return to the main refueling pipeline.

[0007] Based on the structure of the above-mentioned high-flow CNG refueling system, three natural gas inlet pipelines are connected to low-pressure, medium-pressure, and high-pressure gas storage cylinders respectively; the automatic shut-off valve can be either a solenoid valve or a pneumatic emergency shut-off valve.

[0008] Based on the structure of the above-mentioned high-flow CNG refueling system, the main refueling pipeline may include a mass flow meter, a main pipeline manual shut-off valve, branch pipelines, a short refueling hose, a refueling break-off valve, a long refueling hose, and a refueling nozzle; wherein the mass flow meter, the main pipeline manual shut-off valve, the short refueling hose, the refueling break-off valve, the long refueling hose, and the refueling nozzle are arranged sequentially; a pressure transmitter, a pressure gauge, and a manual vent valve are installed on the branch pipelines, and the end of the manual vent valve is connected to the CNG vent pipeline.

[0009] Based on the structure of the above-mentioned high-flow CNG refueling system, the refueling gun has three interfaces: one end is connected to the long refueling hose, the other end is the CNG refueling port for the vehicle, and the refueling gun also integrates a manual nozzle valve.

[0010] Based on the structure of the above-mentioned high-flow CNG refueling system, a long vent hose, a vent break-off valve, and a short vent hose are sequentially connected to the manual nozzle valve, and the short vent hose is connected to the CNG vent pipeline.

[0011] Based on the structure of the above-mentioned high-flow CNG refueling system, the internal diameter of the main refueling pipeline and the natural gas inlet pipeline is φ15~φ20, and the internal diameter of the connecting pipes such as elbows and tees is also φ15~φ20. The equivalent CV value of the mass flow meter is greater than 3; the equivalent CV values ​​of the manual shut-off valve, check valve, automatic shut-off valve and gas manual shut-off valve of the main pipeline are all greater than 7.

[0012] This solution also discloses a high-flow CNG refueling machine, including a high-flow CNG refueling system and a shell structure. A first control panel, opening downwards, is located at the top front of the shell structure. A liquid crystal touchscreen display is centrally mounted on the first control panel. A start button is located below the first control panel. An operation keyboard is located to the left of the first control panel. An emergency stop button is located to the right of the first control panel. A first door panel, opening from the outside, is located at the bottom front of the shell structure. A second control panel, opening downwards, is located at the top rear of the shell structure. A liquid crystal touchscreen display is centrally mounted on the second control panel. A start button is located below the second control panel. A second door panel, opening from the outside, is located at the bottom rear of the shell structure.

[0013] Based on the structure of the aforementioned high-flow CNG dispenser, the top and bottom of the right side of the shell structure are provided with downward-facing louvers. The right side of the shell structure is also equipped with a centralized pipe assembly, a short hose, a breakaway valve, a long hose, a refueling hose hook, a refueling gun, a refueling gun holder, a pressure gauge, and an electrostatic grounding clamp. The top and bottom of the left side of the shell structure of the dispenser are provided with downward-facing louvers. The left side of the shell structure is also equipped with a manual vent valve and a manual shut-off valve installed on the main refueling pipeline.

[0014] Based on the structure of the aforementioned high-flow CNG dispenser, the casing is specifically made of carbon steel with a powder-coated surface.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: 1. This solution, through the special selection of the gas nozzle and its main pipeline, can increase the output flow rate of the entire pipeline per unit time, ensuring a large flow rate output. This can reduce the gas refueling time and queuing time when multiple vehicles are refueling.

[0016] 2. This solution provides detachable panel structures on the front, back, and top of the shell structure, which facilitates maintenance of the high-flow CNG refueling system inside the shell.

[0017] 3. In this plan, the CNG refueling flow rate of the CNG dispenser is increased to over 53 kg / min, which translates to 4500 Nm³ / hour. 3 The speed of refueling is reduced by 1 / h, which greatly shortens the refueling time, especially for large vehicles such as trucks. This significantly reduces refueling time and waiting time, improves the refueling efficiency of the gas dispenser, and increases user satisfaction. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the high-flow-rate CNG refueling system in Example 1; Figure 2 This is a front view of a three-dimensional structural schematic diagram of the high-flow-rate CNG dispenser in Example 2; Figure 3 This is a front view of the high-flow-rate CNG dispenser in Example 2; Figure 4 This is a right-side view of the high-flow-rate CNG dispenser in Example 2; Figure 5 This is a left-side view of the high-flow-rate CNG dispenser in Example 2; Figure 6 This is a rear view of the high-flow-rate CNG dispenser in Example 2; Figure 7 This is a top view of the high-flow-rate CNG dispenser in Example 2; Figure 8 This is a bottom view of the high-flow-rate CNG dispenser in Example 2; Reference numerals: 1. Natural gas inlet pipeline; 2. Main refueling pipeline; 3. Vent pipeline; 4. Refueling nozzle; 5. Safety valve; 101. Shell structure; 102. First control panel; 103. First door panel; 104. Second control panel; 105. Second door panel; 106. Top plate structure; 107. LCD touch screen display; 108. Start button; 109. Operation keyboard; 110. Emergency stop button; 111. Louver; 112. Centralized pipeline assembly; 113. Refueling hose hanger 114. Hook; 115. Gas gun holder; 116. Static grounding clamp; 117. Manual gas inlet shut-off valve; 12. Automatic shut-off valve; 13. Check valve; 21. Mass flow meter; 22. Main pipeline manual shut-off valve; 23. Branch pipeline; 24. Gas filling short hose; 25. Gas filling break-off valve; 26. Gas filling long hose; 231. Pressure transmitter; 232. Pressure gauge; 233. Manual vent valve; 41. Manual gun valve; 42. Venting long hose; 43. Venting break-off valve; 44. Venting short hose. Detailed Implementation

[0019] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0020] Any feature disclosed in this specification (including any appended claims and abstract) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0021] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a predetermined orientation, or be constructed and operated in a predetermined orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0023] Example 1 like Figure 1 As shown, this utility model provides a technical solution: A high-flow-rate CNG refueling system includes a natural gas inlet pipeline 1, a main refueling pipeline 2, and a venting pipeline 3. Multiple natural gas inlet pipelines 1 are connected to the main refueling pipeline 2, and the venting pipeline 3 is connected to the main refueling pipeline 2 via a safety valve 5. A refueling nozzle 4 is installed at the end of the main refueling pipeline 2. The flow coefficient of the hydrogen refueling nozzle and the refueling disconnect valve 25 in the main refueling pipeline 2 is selected to be 3 or higher. The internal pipeline diameter in the main refueling pipeline 2 is φ15~φ20.

[0024] Based on the above structure, by making special selections for the gas nozzle 4 and its main pipeline, the output flow rate of the entire pipeline per unit time can be increased, ensuring a large flow rate output. This can reduce the gas refueling time and queuing time when multiple vehicles are refueling.

[0025] As an example, there are 3 natural gas inlet pipelines 1, and each natural gas inlet pipeline 1 has the same configuration. The natural gas inlet pipeline 1 may include a manual shut-off valve 11, an automatic shut-off valve 12 and a check valve 13. The manual shut-off valve 11, the automatic shut-off valve 12 and the check valve 13 are arranged sequentially along the natural gas flow direction and return to the gas filling main pipeline 2.

[0026] Three natural gas inlet pipelines 1 are respectively connected to low-pressure, medium-pressure and high-pressure gas storage cylinders; the automatic shut-off valve 12 can be a solenoid valve or a pneumatic emergency shut-off valve.

[0027] Based on the above structure, the gas supply to the main gas filling pipeline 2 can be guaranteed through multiple natural gas inlet pipelines 1. At the same time, the installation of a manual shut-off valve 11, an automatic shut-off valve 12, and a check valve 13 on the natural gas inlet pipelines 1 can ensure the safety of natural gas transportation on the pipeline.

[0028] As an example, the main gas filling line 2 may include a mass flow meter 21, a main line manual shut-off valve 22, a branch line 23, a short gas filling hose 24, a gas filling disconnect valve 25, a long gas filling hose 26, and a gas filling nozzle 4; wherein the mass flow meter 21, the main line manual shut-off valve 22, the short gas filling hose 24, the gas filling disconnect valve 25, the long gas filling hose 26, and the gas filling nozzle 4 are arranged in sequence; a pressure transmitter 231, a pressure gauge 232, and a manual vent valve 233 are installed on the branch line, and the end of the manual vent valve 233 is connected to the CNG vent line 3.

[0029] The gas nozzle 4 has three interfaces: one end is connected to the long gas refueling hose 26, the other end is the CNG refueling port for automobiles, and the gas nozzle 4 also integrates a manual nozzle valve 41.

[0030] The manual nozzle valve 41 is sequentially connected to a long vent hose 42, a vent disconnect valve 43, and a short vent hose 44. The short vent hose 44 is connected to the CNG vent pipeline 3 so that the released natural gas is concentrated in the CNG vent pipeline 3 and then connected to the vent pipeline in the underground trench. It is worth noting that the long vent hose 42 and the long refueling hose 26 are bundled together as a single hose. In this scheme, the manual nozzle valve 41 is manually opened to release the gas in the hose for depressurization. The depressurization port is sequentially connected to the long vent hose 42, the vent disconnect valve 43, and the short vent hose 44.

[0031] As an example, the internal diameter of the gas filling main pipeline 2 and the natural gas inlet pipeline 1 is φ15~φ20, and the internal diameter of the elbows, tees and other fittings related to the connecting pipelines is also φ15~φ20. The equivalent CV value of the mass flow meter 21 is 3 or more.

[0032] The equivalent CV values ​​of the main pipeline manual shut-off valve 22, check valve 13, automatic shut-off valve 12, and gas manual shut-off valve are all greater than 7. If the design and selection conditions mentioned above are met, the CNG dispenser can achieve high-flow gas dispensing performance.

[0033] Based on the special selection and combination described above, the pipeline valve assembly can meet the high-flow gas dispensing requirements of the gas dispenser. The theoretical calculation results are as follows: The equivalent CV value of the entire pipeline valve assembly system is calculated as shown in the table below:

[0034] Example 2 like Figures 2-8 As shown, this utility model provides a technical solution: A high-flow CNG refueling machine includes a high-flow CNG refueling system and a housing structure 101. The high-flow CNG refueling system is embedded in the housing structure 101. A detachable first control panel 102 and a first door panel 103 are provided on the front of the housing structure 101. A detachable second control panel 104 and a second door panel 105 are provided on the back of the housing structure 101. A detachable top plate structure 106 is provided at the top of the housing structure 101.

[0035] Based on the above structure, the front, back and top of the shell structure 101 are provided with detachable panel structures, which can facilitate the maintenance of the high-flow CNG refueling system inside the shell.

[0036] Specifically, a first control panel 102, which can be opened from top to bottom, is located at the top front of the gas dispenser, facilitating the installation and maintenance of electrical components. A centrally located LCD touchscreen display 107 is installed on the first control panel 102 for operating the electrical control system. A start button 108 is also installed at the bottom of the first control panel 102. An operation keyboard 109 is installed on the left side of the first control panel 102, and an emergency stop button 110 is installed on the right side. A first door panel 103, which can be opened from the outside, is located at the bottom front of the gas dispenser, facilitating the installation of internal piping, valve assemblies, and instrument assemblies. Downward-facing louvers 111 are located at the top and bottom of the right side of the gas dispenser to facilitate equipment ventilation and prevent compressed natural gas buildup. A centralized pipe assembly 112, a short hose, and a breakaway valve are also installed on the right side. The gas dispenser includes a long hose, a gas hose hook 113, a gas nozzle 4, a gas nozzle holder 114, a pressure gauge 232, and an electrostatic grounding clamp 115. The top and bottom of the left side of the dispenser are equipped with downward-facing louvers 111 for ventilation and to prevent compressed natural gas buildup. A manual vent valve 233 and a manual shut-off valve on the main gas pipeline 2 are also installed on the left side. A second control panel 104, which can be opened from top to bottom, is located at the top rear of the dispenser for easy access to electrical components for installation and maintenance. A centrally located LCD touchscreen display 107 is installed on the second control panel 104 for operating the electrical control system. A start button 108 is also installed below the second control panel 104. A second door panel 105, which can be opened from the outside, is located at the bottom rear of the dispenser for easy installation of internal pipeline valve assemblies and instrument assemblies.

[0037] The casing is made of carbon steel with a powder-coated surface. The casing contains pipe and valve components. The top of the casing has a movable top plate that can be opened from the outside, which is screwed on to facilitate the installation and maintenance of the top pipes. The bottom of the casing has a mounting base that supports the entire casing frame, and there are bolt holes on the base.

[0038] The pipeline valve assembly specifically features an air inlet pipe interface and a centralized vent interface at the bottom, facilitating the laying of pipelines from the bottom trench of the equipment installation foundation.

[0039] The gas nozzle holder 114 is specifically a locking mechanism installed on the right side of the gas dispenser. It is used to insert the gas nozzle 4 into the holder for fixing. When needed, the locking mechanism is opened, the gas nozzle 4 is pulled out and inserted into the gas filling port of the car for refueling. The gas hose hook 113 is a stainless steel strip hook-shaped pendant used to store gas hoses. The stainless steel material increases wear resistance and facilitates long-term use of the hose and hook.

[0040] The electrical control system consists of two LCD touch screens 107, two separate start buttons 108, one emergency stop button 110, an operation keyboard 109, several junction boxes, and cables. The LCD touch screens 107 display the equipment status in real time and allow users to set parameters and perform debugging operations. Two LCD touch screens 107 are arranged, one at the front and one at the rear of the gas dispenser. Two start buttons 108 are also arranged, one at the front and one at the rear of the gas dispenser. Clicking one start button 108 during vehicle refueling enables one-button refueling. The emergency stop button 110 is used for emergency shutdown. The operation keyboard 109 allows users to set the refueling volume and amount. The junction boxes connect to the various electrical components and transmitter cables.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high flow CNG dispensing system characterized by: It includes a natural gas inlet pipeline (1), a gas filling main pipeline (2) and a venting pipeline (3). Multiple natural gas inlet pipelines (1) are connected to the gas filling main pipeline (2), and the venting pipeline (3) is connected to the gas filling main pipeline (2) through a safety valve (5). A gas filling gun (4) is installed at the end of the gas filling main pipeline (2). The flow coefficient of the hydrogen filling gun and the gas filling disconnect valve (25) in the gas filling main pipeline (2) is selected to be 3 or above. The internal pipeline diameter in the gas filling main pipeline (2) is φ15~φ20.

2. A high flow CNG dispensing system as claimed in claim 1, wherein: There are 3 natural gas inlet pipelines (1), and each natural gas inlet pipeline (1) is configured in the same way. The natural gas inlet pipeline (1) may include a manual shut-off valve (11), an automatic shut-off valve (12) and a check valve (13). The manual shut-off valve (11), the automatic shut-off valve (12) and the check valve (13) are arranged in sequence along the natural gas flow direction and return to the gas filling main pipeline (2).

3. The high-flow-rate CNG refueling system as described in claim 2, characterized in that: Three natural gas inlet pipelines (1) are connected to low-pressure, medium-pressure and high-pressure gas storage cylinders respectively; the automatic shut-off valve (12) can be a solenoid valve or a pneumatic emergency shut-off valve.

4. A high-flow-rate CNG refueling system as described in claim 3, characterized in that: The main gas pipeline (2) may include a mass flow meter (21), a main pipeline manual shut-off valve (22), a branch pipeline (23), a gas filling short hose (24), a gas filling break valve (25), a gas filling long hose (26), and a gas filling gun (4); wherein the mass flow meter (21), the main pipeline manual shut-off valve (22), the gas filling short hose (24), the gas filling break valve (25), the gas filling long hose (26), and the gas filling gun (4) are arranged in sequence; a pressure transmitter (231), a pressure gauge (232), and a manual vent valve (233) are provided on the branch pipeline, and the end of the manual vent valve (233) is connected to the CNG vent pipeline (3).

5. A high-flow-rate CNG refueling system as described in claim 4, characterized in that: The gas gun (4) has three ports. One port is connected to the long gas hose (26), and the other port is the CNG refueling port for automobiles. In addition, the gas gun (4) also integrates a manual gun valve (41).

6. A high-flow-rate CNG refueling system as described in claim 5, characterized in that: The manual gun valve (41) is connected in sequence to the long vent hose (42), the vent break valve (43), and the short vent hose (44), and the short vent hose (44) is connected to the CNG vent pipeline (3).

7. A high-flow-rate CNG refueling system as described in claim 6, characterized in that: The internal diameter of the gas main pipeline (2) and the natural gas inlet pipeline (1) is φ15~φ20. The internal diameter of the elbows and tees of the connecting pipelines is also φ15~φ20. The equivalent CV value of the mass flow meter (21) is 3 or more. The valve equivalent CV values ​​of the manual shut-off valve (22), check valve (13), automatic shut-off valve (12) and gas manual shut-off valve of the main pipeline are all greater than 7.

8. A high-flow-rate CNG dispenser, characterized in that: The system includes a high-flow CNG refueling system as described in any one of claims 1 to 7 and a housing structure (101). A first control panel (102) that opens from top to bottom is provided at the top front of the housing structure (101). A liquid crystal touch screen (107) is installed in the center of the first control panel (102). A start button (108) is also installed at the lower side of the first control panel (102). An operation keyboard (109) is installed on the left side of the first control panel (102). An emergency stop button (110) is installed on the right side of the first control panel (102). A first door panel (103) that opens from the outside is installed at the bottom front of the housing structure (101). A second control panel (104) that opens from top to bottom is provided at the top rear of the housing structure (101). A liquid crystal touch screen (107) is installed in the center of the second control panel (104). A start button (108) is also installed at the lower side of the second control panel (104). A second door panel (105) that opens from the outside is installed at the bottom rear of the housing structure (101).

9. A high-flow-rate CNG dispenser as described in claim 8, characterized in that: The top and bottom of the right side of the shell structure (101) are provided with downward-facing louvers (111). The right side of the shell structure (101) is also equipped with a centralized pipe assembly (112), a short hose, a break valve, a long hose, a gas hose hook (113), a gas gun (4), a gas gun holder (114), a pressure gauge (232), and an electrostatic grounding clamp (115). The top and bottom of the left side of the gas dispenser of the shell structure (101) are provided with downward-facing louvers (111). The left side of the shell structure (101) is also equipped with a manual vent valve (233) and a manual shut-off valve on the gas main pipeline (2).

10. A high-flow-rate CNG dispenser as described in claim 9, characterized in that: The casing is made of carbon steel and has a powder-coated surface.

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