High-pressure nitrogen inflation method and inflation system suitable for narrow metal container

Abstract

The invention discloses a high-pressure nitrogen inflation system and method suitable for a narrow metal container. The high-pressure nitrogen inflation system comprises a working gas source, a driving gas source, an inflation jig and a gas distribution console, and the inflation jig is used for being installed and communicated with the narrow metal container; a booster pump, a first pipeline and a second pipeline are arranged in the gas distribution console; the working gas source is communicated with the inflating jig through a first pipeline to form an inflating pipeline for inflating the narrow metal container; the driving gas source communicates with the booster pump through a second pipeline to form a boosting pipeline; the booster pump communicates with the inflation pipeline; the working gas source is started to fill high-pressure nitrogen into the narrow metal container through the gas filling pipeline, so that after the pressure value of the narrow metal container reaches an intermediate pressure value, the driving gas source is started to drive the booster pump to work through the pressurizing pipeline, and the high-pressure nitrogen output by the working gas source is pressurized through the booster pump and then filled into the narrow metal container. Therefore, the pressure value in the narrow metal container reaches the target pressure value.

Description

Technical Field

[0001] The present invention relates to a high-pressure nitrogen gas filling method and a gas filling system suitable for narrow metal containers, and more specifically, to a high-pressure nitrogen gas filling method and a gas filling system suitable for narrow metal containers with a diameter of less than or equal to about 80 mm. Background Art

[0002] At present, the pressure in a standard nitrogen cylinder when full is no more than 15MPa. If a small container is directly inflated, the pressure in the cavity cannot reach more than 25MPa. If the inflation speed is too fast during the inflation process, the temperature in the container will rise too quickly. The high temperature in the container will not only increase the safety risk, but also the pressure in the container will drop to a large extent after the inflation is completed; if the inflation speed is too slow, it will lead to low efficiency.

[0003] Therefore, in order to solve the above defects, it is urgent to develop a high-pressure nitrogen inflation method and inflation system suitable for narrow metal containers that overcome the above defects. Summary of the invention

[0004] In view of the above problems, the present invention provides a high-pressure nitrogen gas filling system suitable for a narrow metal container, which includes:

[0005] Working gas source, used to provide high-pressure nitrogen;

[0006] A driving gas source, used for providing driving gas;

[0007] Inflatable fixture, used to install and connect to narrow metal containers;

[0008] A gas distribution console, which has a booster pump, a first pipeline and a second pipeline built therein; the working gas source is connected to the inflation fixture through the first pipeline to form an inflation pipeline for inflating the narrow metal container; the driving gas source is connected to the booster pump through the second pipeline to form a booster pipeline, and the booster pump is connected to the inflation pipeline;

[0009] Among them, the working gas source is turned on to charge high-pressure nitrogen into the narrow metal container through the charging pipeline to make the pressure value of the narrow metal container reach an intermediate pressure value, and then the driving gas source is turned on to drive the boosting pump to work through the boosting pipeline, and the high-pressure nitrogen output by the working gas source is pressurized by the boosting pump and then charged into the narrow metal container, so that the pressure value in the narrow metal container reaches the target pressure value.

[0010] The above-mentioned high-pressure nitrogen gas charging system, wherein the working gas source comprises:

[0011] Nitrogen cylinders;

[0012] A first adapter, one end of which is connected to the gas outlet of the nitrogen cylinder, and the other end of the first adapter is connected to the first pipeline through a high-pressure hose, and the high-pressure nitrogen output from the nitrogen cylinder is input into the first pipeline through the high-pressure hose.

[0013] The above-mentioned high-pressure nitrogen inflation system, wherein the driving gas source comprises:

[0014] Gas cylinders;

[0015] A second adapter, one end of which is connected to the gas outlet of the gas cylinder, and the other end of the second adapter is connected to the second pipeline through a high-pressure hose. The driving gas output from the gas cylinder enters the booster pump through the high-pressure hose and the second pipeline.

[0016] The above-mentioned high-pressure nitrogen inflation system, wherein the inflation fixture comprises:

[0017] The main body has an air inlet on one side thereof, and the air inlet is connected to the first pipeline through a high-pressure hose;

[0018] A first interface, installed at the bottom of the body and connected to the air inlet, the first interface is used to connect to the air inlet interface of the narrow metal container;

[0019] A push rod assembly is mounted on the top of the body, and the push rod assembly is rotated to open the protection mechanism at the air inlet interface;

[0020] The first stop valve is installed on the other side of the main body, and the connection passage between the air inlet and the first interface is opened or closed by the first stop valve, and the inflation rate between the air inlet and the first interface is adjusted.

[0021] The above-mentioned high-pressure nitrogen inflation system, wherein the inflation fixture also includes: a digital pressure gauge, which is installed on the main body and located on the side opposite to the air inlet, and the digital pressure gauge is used to monitor and display the pressure value in the cavity of the narrow metal container in real time.

[0022] The above-mentioned high-pressure nitrogen charging system, wherein the gas distribution console comprises:

[0023] A cabinet, wherein the booster pump, the first pipeline and the second pipeline are arranged in the cabinet;

[0024] At least one second stop valve, installed on the first pipeline and the second pipeline respectively;

[0025] At least one pressure reducing valve installed on the first pipeline and the second pipeline;

[0026] A control panel is installed on the cabinet, and the second stop valve is controlled by the control panel to adjust the on-off and flow rate of the first pipeline and the second pipeline, and the pressure reducing valve is controlled by the control panel to adjust the gas pressure of the first pipeline and the second pipeline.

[0027] The above-mentioned high-pressure nitrogen inflation system, wherein a high-pressure nitrogen inlet, a driving gas inlet, a high-pressure nitrogen outlet and an exhaust port are provided on one side of the cabinet, the high-pressure nitrogen inlet is connected to the first pipeline and the first adapter, the driving gas inlet is connected to the second pipeline and the second adapter, the high-pressure nitrogen outlet is connected to the inlet, and the exhaust port is connected to the first pipeline.

[0028] The above-mentioned high-pressure nitrogen inflation system, wherein the ejector assembly comprises:

[0029] A push rod handle is mounted on the top of the main body and one end of the push rod handle extends into the main body;

[0030] An ejector pin, one end of which is connected to one end of the ejector rod handle, is used for rotating the ejector rod handle so that the ejector pin is retracted into or extended out of the first interface, and the ejector pin is extended out of the first interface to open the protective mechanism at the air inlet interface.

[0031] The present invention also provides a high-pressure nitrogen gas charging method suitable for a narrow metal container, which comprises:

[0032] Pipeline construction steps: construct a first pipeline connecting the working gas source and the gas distribution console, an inflation pipeline of the inflation fixture and the narrow metal container, and construct a second pipeline connecting the driving gas source and the gas distribution console and a booster pipeline of the booster pump;

[0033] Inflating step: opening the working gas source and filling the narrow metal container with high-pressure nitrogen through the inflation pipeline to adjust the pressure value of the narrow metal container to an intermediate pressure value;

[0034] Pressurization step: open the driving gas source to drive the booster pump to work through the booster pipeline, and use the booster pump to pressurize the high-pressure nitrogen output by the working gas source and then fill it into the narrow metal container, so that the pressure value in the narrow metal container reaches the target pressure value.

[0035] The above-mentioned high-pressure nitrogen inflation method, wherein the inflation step comprises:

[0036] Controlling and adjusting the on / off, flow rate and gas pressure of the first pipeline through the gas distribution console;

[0037] The pressurization step comprises:

[0038] The on-off, flow rate and gas pressure of the second pipeline are controlled and adjusted by the gas distribution console.

[0039] Compared with the prior art, the present invention has the following effects: the high-pressure nitrogen is pressurized and then filled into a closed container with a deflation function; the disassembly process is performed without pressure to ensure safety; and the present invention has a pressure monitoring function to measure the actual pressure in the cavity, proving that the requirement of greater than 25MPa can be met after the inflation is completed.

[0040] Other features and advantages of the present invention will be described in the following description, and partly become obvious from the description, or be understood by implementing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 It is a structural schematic diagram of the high-pressure nitrogen charging system of the present invention;

[0043] Figure 2 It is a structural schematic diagram of the inflatable fixture;

[0044] Figure 3 It is a schematic diagram of the top rod;

[0045] Figure 4 is a schematic diagram of a first stop valve;

[0046] Figure 5 This is a schematic diagram of the gas distribution console;

[0047] Figure 6 This is a schematic diagram of the operation panel;

[0048] Figure 7 This is a schematic diagram of the adapter;

[0049] Figure 8 A flow chart of the high-pressure nitrogen charging method of the present invention;

[0050] Fig. 9 This is the piping diagram inside the gas distribution control cabinet. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] The exemplary embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention. In addition, elements / components with the same or similar reference numerals used in the drawings and embodiments are used to represent the same or similar parts.

[0053] The terms “first”, “second”, “S1”, “S2”, etc. used in this document do not specifically refer to an order or sequence, nor are they used to limit the present invention. They are only used to distinguish elements or operations described with the same technical terms.

[0054] The directional terms used in this document, such as up, down, left, right, front or back, etc., are only used to refer to the directions of the drawings. Therefore, the directional terms used are used to illustrate and not to limit the present invention.

[0055] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0056] As used herein, "and / or" includes any or all combinations of the items described.

[0057] As used herein, “plurality” includes “two” and “more than two”; as used herein, “plurality groups” includes “two groups” and “more than two groups”.

[0058] Certain terms used to describe the present application are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art regarding the description of the present application.

[0059] See also Figure 1 and Fig. 9 , Figure 1 is a schematic structural diagram of the high-pressure nitrogen charging system of the present invention, Fig. 9 This is the piping diagram inside the gas distribution control cabinet. Figure 1 and Fig. 9As shown, a high-pressure nitrogen inflation system suitable for a narrow metal container of the present invention comprises: a working gas source 11, a driving gas source 12, an inflation fixture 13 and a gas distribution console 14, wherein the working gas source 11 is used to provide high-pressure nitrogen; the driving gas source 12 is used to provide driving gas; the inflation fixture 13 is used to be installed and connected to the narrow metal container 2; the gas distribution console 14 is equipped with a booster pump 141, a first pipeline 142 and a second pipeline 143; the working gas source 11 is connected to the inflation fixture 13 through the first pipeline 142 to form an inflation pipeline for inflating the narrow metal container 2; the driving gas source 12 The boosting pump 141 is connected to the second pipeline 143 to form a boosting pipeline, and the boosting pump 141 is connected to the inflation pipeline; wherein, after the working gas source 11 is turned on to fill the narrow metal container 2 with high-pressure nitrogen through the inflation pipeline, so that the pressure value of the narrow metal container 2 reaches an intermediate pressure value, the driving gas source 12 is turned on to drive the boosting pump 141 to work through the boosting pipeline, and the high-pressure nitrogen output from the working gas source 11 is pressurized by the boosting pump 141 and then filled into the narrow metal container 2, so that the pressure value in the narrow metal container 2 reaches the target pressure value.

[0060] In order to solve the problem that the pressure of the standard nitrogen gas source is insufficient and cannot meet the requirements of the container filling pressure, the present invention designs a booster pump 141 on the gas distribution console 14 to pressurize the high-pressure nitrogen and inject it into the narrow metal container 2. The gas distribution console 14 is designed with two main pipelines, one of which is the working gas source pipeline, which can charge the original gas source pressure in the working gas source 11 into the container; the other pipeline is the driving gas source pipeline, which can control whether to start the booster pump 141. When the pressure of the working gas source 11 is insufficient, the booster pump 141 is started to pressurize the nitrogen and continue to charge it into the narrow metal container 2. The present invention is sealed and connected with the interface of the narrow metal container 2 through the charging fixture 13, and has a monitoring function, which can monitor the actual pressure of the nitrogen charged into the cavity of the narrow metal container 2, and pressurizes the high-pressure nitrogen provided by the working gas source 11 through the gas distribution console 14, and charges it into the narrow metal container 2 after pressurization, and has a deflation function to ensure safety and make the disassembly process non-pressurized operation.

[0061] It should be noted that, in the present embodiment, the working gas source 11 and the driving gas source 12 are both nitrogen gas sources. When the driving gas source 12 is a nitrogen gas source, the driving gas is nitrogen.

[0062] Please refer to Figure 7 , Figure 7 Figure 1 is a schematic diagram of the adapter. Figure 7 Please combine with Figure 1The working gas source 11 comprises: a nitrogen cylinder 111 and a first adapter 112, one end of the first adapter 112 is connected to the gas outlet of the nitrogen cylinder 111, and the other end of the first adapter 112 is connected to the first pipeline 142 through a high-pressure hose 15, and the high-pressure nitrogen output by the nitrogen cylinder 111 is input into the first pipeline 142 through the high-pressure hose 15; the driving gas source 12 comprises: a gas cylinder 121 and a second adapter 122, one end of the second adapter 122 is connected to the gas outlet of the gas cylinder 121, and the other end of the second adapter 122 is connected to the second pipeline 143 through a high-pressure hose 16, and the driving gas output by the gas cylinder 121 enters the booster pump 141 through the high-pressure hose 16 and the second pipeline 143;

[0063] In this embodiment, the first adapter 112 and the second adapter 122 are mainly composed of connectors T1 and nuts T2 of different sizes, which are used to connect the connection interfaces of the high-pressure hoses 15 and 16 with the nitrogen cylinder 111 and the gas cylinder 121, so that the entire system can be effectively connected and sealed;

[0064] It should be noted that, in this embodiment, a plurality of adapters T are also included, and the plurality of adapters T have the same structure as the first adapter 112 and the second adapter 122. The plurality of adapters T are respectively used to connect the connection interfaces of the high-pressure hoses 15, 16, 17 and the gas distribution console 14 and the inflatable fixture 13, so that the entire system can be effectively connected and have a tight seal.

[0065] The invention uses a high-pressure hose to connect a gas source, a gas distribution console and a charging fixture to transmit nitrogen, and the high-pressure hose has a high-pressure resistance performance.

[0066] Please refer to Figure 2-Figure 4 , Figure 2 It is a structural schematic diagram of the inflatable fixture; Figure 3 It is a schematic diagram of the top rod; Figure 4 Schematic diagram of the first stop valve. Figure 2-Figure 4 Please combine with Figure 1The inflatable jig 13 includes: a main body 131, a first interface 132, a push rod assembly 133 and a first stop valve 134. An air inlet K1 is provided on one side of the main body 131, and the air inlet K1 is connected to the first pipeline 142 through a high-pressure hose 17; the first interface 132 is installed at the bottom of the main body 131 and is connected to the air inlet K1, and the first interface 132 is used to connect the air inlet interface of the narrow metal container 2; the push rod assembly 133 is installed on the top of the main body 131, and the push rod assembly 133 is rotated to open the protection mechanism at the air inlet interface; the first stop valve 134 is installed on the other side of the main body 131, and the connection path between the air inlet K1 and the first interface 132 is opened or closed by the first stop valve 134, and the inflation rate between the air inlet K1 and the first interface 132 is adjusted.

[0067] The inflation jig 13 further includes a digital pressure gauge 135 , which is mounted on the main body 131 and located on the side opposite to the air inlet K1 , and monitors and displays the pressure value in the cavity of the narrow metal container 2 in real time through the digital pressure gauge 135 .

[0068] Furthermore, the ejector assembly 133 includes: an ejector handle 1331 and an ejector pin 1332, the ejector handle 1331 is installed on the top of the main body 131 and one end of the ejector handle 1331 extends into the main body 131; one end of the ejector pin 1332 is connected to one end of the ejector handle 1331, and the ejector handle 1331 is rotated to cause the ejector pin 1332 to retract into or extend out of the first interface 132, and the ejector pin 1332 extends out of the first interface 132 to open the protective mechanism at the air inlet interface.

[0069] Specifically, the inflatable jig 13 of the present invention is compact and flexible to operate. The inflatable jig 13 has the function of cutting off the gas source and monitoring the pressure in the container cavity. The inflatable jig 13 is mainly composed of a base 131, a first stop valve 134, a push rod handle 1331, a digital pressure gauge 135, a first interface 132, etc. A sealing ring is installed on the first interface 132 to seal and dock with the interface of the container 2. Because there is a protective mechanism at the air inlet interface of the container 2, when inflating, the push rod handle 1331 can extend the ejector pin 1332, open the protective mechanism at the air inlet interface of the container 2, and allow nitrogen to be filled into the container more safely. The air inlet interface can be used as a switch to cut off the nitrogen gas source or open the gas source, and fine-tuning can control the inflation rate. The sealing ring F1 and the sealing pad F2 are installed at the connection between the push rod handle 1331 and the body 131, and the first stop valve 134 and the body 131 to enhance the sealing of the inflatable jig. The digital pressure gauge 135 has a built-in sensor, which can monitor the pressure in the cavity of the container 2 in real time and display the current inflation rate;

[0070] Since container 2 is relatively narrow and a protective mechanism is designed at the air inlet interface of container 2 so that its inner cavity can be sealed temporarily to store high-pressure nitrogen, the inflation jig is designed with a push rod handle 1331. The front part of the push rod handle 1331 is a slender push pin 1332. By rotating the push rod handle 1331, the extension and retraction of the push pin 1332 can be controlled. When the push pin 1332 is extended, the protective device at the container interface can be opened, so that nitrogen can be filled into the container. In order to ensure the safety of operation, a stop valve is designed to control the inflation speed and cut off the gas source, so that the installation and disassembly of the inflation jig are in a non-pressurized state. A digital pressure gauge is designed on the inflation jig. The digital pressure gauge has a built-in sensor that can display the real-time pressure in the container cavity with high precision.

[0071] Please refer to Figure 5-Figure 6 , Figure 5 This is a schematic diagram of the gas distribution console; Figure 6 The following is a schematic diagram of the operation panel. Figure 5-Figure 6 Please combine with Figure 1 The gas distribution console 14 includes: a cabinet 144, at least one second stop valve 145, at least one pressure reducing valve 146 and a control panel 147. The booster pump 141, the first pipeline 142 and the second pipeline 143 are arranged in the cabinet 144; at least one second stop valve 145 is installed on the first pipeline 142 and the second pipeline 143 respectively; at least one pressure reducing valve 146 is installed on the first pipeline 142 and the second pipeline 143; the control panel 147 is installed on the cabinet 144, and the second stop valve 145 is controlled by the control panel 147 to adjust the on-off and flow rate of the first pipeline 142 and the second pipeline 143, and the pressure reducing valve 146 is controlled by the control panel 147 to adjust the gas pressure of the first pipeline 142 and the second pipeline 143.

[0072] Furthermore, a high-pressure nitrogen inlet K2, a driving gas inlet K3, a high-pressure nitrogen outlet K4 and an exhaust port K5 are provided on one side of the cabinet 144, the high-pressure nitrogen inlet K2 is connected to the first pipeline 142 and the first adapter 112, the driving gas inlet K3 is connected to the second pipeline 143 and the second adapter 122, the high-pressure nitrogen outlet K4 is connected to the inlet K1, and the exhaust port K5 is connected to the first pipeline 142.

[0073] The gas distribution console is mainly composed of a control panel 147, pressure gauges P1, P2, P3, P4, P5, a booster pump 141, pipelines 142, 143, valves 145, 146, universal rollers 149, an exhaust port K5, etc. A pressure gauge 148 is installed on the control panel 147. The pressure gauges P1, P2, P3, P4, P5 can display the pressure values ​​in each pipeline, the pressure values ​​of the driving gas source, and the pressure values ​​of the working gas source; multiple pipelines are arranged in the gas distribution console, and by controlling the corresponding stop valves K1, K2, K3, K4, K5, adjusting the stop valves K1, K2, K3, K4, K5 can control the on-off and flow rate of the airflow in each pipeline, and can control whether to start the booster pump 141. By controlling the corresponding pressure reducing valves J1, J2, J3, and adjusting the pressure reducing valve 146, the gas pressure in each pipeline can be adjusted. The booster pump 141 is used to boost the pressure of the nitrogen gas source, and then fill it into the container 2 after boosting. The exhaust port K5 is used to exhaust and release the remaining gas in the pipeline after inflation, ensuring that the pipeline can be operated only after there is no pressure, thereby improving safety. A universal roller 149 is installed at the bottom of the gas distribution table, which can move the gas distribution console to a suitable position to enhance operability; a pressure gauge is designed on the gas distribution console 14, which can display the real-time pressure values ​​of each pipeline and the driving gas source and working gas source. A shut-off valve is designed to control the inflation speed of each pipeline and the on-off of the airflow. Finally, the nitrogen is output from the output pressure port of the gas distribution table.

[0074] The following combination Figure 1 The specific operation process of the high-pressure nitrogen charging system of the present invention is specifically described:

[0075] 1. Pipeline connection

[0076] 1) Connect the nitrogen gas source interface for the working gas source to the adapter, connect the other end of the adapter to the high-pressure hose, and then connect the other end of the high-pressure hose to the working gas source port of the gas distribution station.

[0077] 2) Connect the interface of the nitrogen gas source used for driving gas source to the adapter, connect the other end of the adapter to the high-pressure hose, and then connect the other end of the high-pressure hose to the driving gas source port of the gas distribution station.

[0078] 3) Remove the plug at the container interface, put the sealing ring on the first interface of the inflation tool, and dock the ejector rod with the container.

[0079] 4) Connect the air inlet of the inflation fixture to the high-pressure hose through an adapter, and connect the other end of the high-pressure hose to the output pressure port of the gas distribution station.

[0080] 2. Inflation

[0081] 1) Turn the stop valve handle on the inflation tool clockwise to close the air inlet. Turn the top rod handle of the inflation fixture clockwise to open the protective device in the container. Turn on the digital pressure gauge and observe the value on the digital pressure gauge. Slowly turn the stop valve handle counterclockwise to open the air inlet.

[0082] 2) Open the stop valve on the gas distribution platform that controls the working gas source pipeline, and then open the nitrogen gas source valve used for the working gas source, and observe the corresponding pressure gauge on the gas distribution platform to display the pressure in the nitrogen cylinder of this working gas source.

[0083] 3) Observe the digital pressure gauge on the inflation fixture. When the working gas source pressure is insufficient to further increase the pressure in the container, open the stop valve on the gas distribution platform that controls the drive gas source pipeline, and then open the nitrogen gas source valve used for the drive gas source. Observe the corresponding pressure gauge on the gas distribution platform to display the pressure in the nitrogen cylinder of the drive gas source.

[0084] 4) Open the corresponding stop valve on the gas distribution platform and start the booster pump. During the inflation process, the pressure reducing valve can be slowly adjusted to adjust the pressure. The inflation rate of the gas distribution platform can be adjusted by controlling the corresponding stop valve.

[0085] 5) Observe the digital pressure gauge on the inflation tool. When the value on the digital pressure gauge reaches the target pressure of 25MPa or above, stop inflation.

[0086] 3. Pressure relief and removal of pipelines

[0087] 1) Close the stop valves of the two pipelines on the gas distribution platform. Turn the stop valve handle on the charging tool clockwise to close the air inlet. Turn the top rod handle of the charging tool counterclockwise to close the protective device in the container. Turn off the two nitrogen gas sources.

[0088] 2) Open the corresponding stop valve on the gas distribution platform to allow the remaining gas in the pipeline to be discharged from the exhaust port on the gas distribution platform.

[0089] 3) After the remaining gas in the pipeline is depressurized, rotate the stop valve handle of the inflation tool counterclockwise to release the remaining gas in the inflation tool.

[0090] 4) Confirm that the stop valves on the gas distribution platform are in the closed state and the pressure reducing valves are in the relaxed state.

[0091] 5) Turn off the digital pressure gauge on the inflation jig, remove the high-pressure hose connected to the inflation tool, and remove the inflation jig.

[0092] 6) Install and tighten the plug in the original container and secure it with stainless steel wire.

[0093] 7) Remove the adapter and high-pressure hose connected to the gas distribution platform. The work of filling the container with high-pressure nitrogen is completed.

[0094] Please refer to Figure 8 , Figure 8 Flow chart of the high-pressure nitrogen charging method of the present invention. Figure 8 As shown, a high-pressure nitrogen inflation method applicable to a narrow metal container of the present invention is applied to any of the above-mentioned high-pressure nitrogen inflation systems, and the high-pressure nitrogen inflation method comprises:

[0095] Pipeline construction step S1: construct a first pipeline connecting the working gas source, the gas distribution console, an inflation pipeline of the inflation fixture and the narrow metal container, and construct a second pipeline connecting the driving gas source, the gas distribution console and a booster pipeline of the booster pump;

[0096] Inflating step S2: opening the working gas source to fill the narrow metal container with high-pressure nitrogen through the inflation pipeline, so that the pressure value of the narrow metal container reaches an intermediate pressure value;

[0097] Pressurization step S3: Open the driving gas source to drive the boosting pump to work through the boosting pipeline, and use the boosting pump to pressurize the high-pressure nitrogen output by the working gas source and then fill it into the narrow metal container to make the pressure value in the narrow metal container reach the target pressure value.

[0098] Wherein, the inflation step S2 comprises:

[0099] Controlling and adjusting the on / off, flow rate and gas pressure of the first pipeline through the gas distribution console;

[0100] The pressurizing step S3 comprises:

[0101] The on-off, flow rate and gas pressure of the second pipeline are controlled and adjusted by the gas distribution console.

[0102] The high-pressure nitrogen charging method of the present invention is specifically described below in conjunction with an embodiment:

[0103] 1. At the beginning of the inflation process, when the pressure in the container is lower than the working gas source pressure, there is no need to start the booster pump. Adjust the opening degree of the stop valve on the inflation tool to 10%.

[0104] 2. When the pressure in the container is close to the working gas source pressure, adjust the opening degree of the stop valve on the inflation tool to 40%.

[0105] 3. When the pressure in the container stops increasing, open the driving air source pipeline to start the booster pump, adjust the opening degree of the driving air source pipeline valve to 50%, and adjust the opening degree of the stop valve on the inflation tool to 50%.

[0106] 4. When the pressure in the container is greater than 25MPa, adjust the opening degree of the driving air source pipeline valve to 80%, and adjust the opening degree of the stop valve on the inflation tool to 80% until the target pressure is reached in the container.

[0107] In summary, the present invention pressurizes high-pressure nitrogen and then fills it into a closed container with a deflation function. The disassembly process is performed without pressure to ensure safety. At the same time, it has a pressure monitoring function and can measure the actual pressure in the cavity, proving that the requirement of greater than 25MPa can be met after the inflation is completed.

[0108] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-pressure nitrogen gas filling system suitable for small metal containers, characterized in that: include: Working gas source, used to provide high-pressure nitrogen; A driving gas source, used for providing driving gas; Inflatable fixture, used to install and connect to narrow metal containers; A gas distribution console, which has a booster pump, a first pipeline and a second pipeline built therein; the working gas source is connected to the inflation fixture through the first pipeline to form an inflation pipeline for inflating the narrow metal container; the driving gas source is connected to the booster pump through the second pipeline to form a booster pipeline, and the booster pump is connected to the inflation pipeline; Among them, the working gas source is turned on to charge high-pressure nitrogen into the narrow metal container through the charging pipeline to make the pressure value of the narrow metal container reach an intermediate pressure value, and then the driving gas source is turned on to drive the boosting pump to work through the boosting pipeline, and the high-pressure nitrogen output by the working gas source is pressurized by the boosting pump and then charged into the narrow metal container, so that the pressure value in the narrow metal container reaches the target pressure value.

2. The high-pressure nitrogen charging system according to claim 1, characterized in that: The working gas source comprises: Nitrogen cylinders; A first adapter, one end of which is connected to the gas outlet of the nitrogen cylinder, and the other end of the first adapter is connected to the first pipeline through a high-pressure hose, and the high-pressure nitrogen output from the nitrogen cylinder is input into the first pipeline through the high-pressure hose.

3. The high-pressure nitrogen charging system according to claim 2, characterized in that: The driving gas source comprises: Gas cylinders; A second adapter, one end of which is connected to the gas outlet of the gas cylinder, and the other end of the second adapter is connected to the second pipeline through a high-pressure hose. The driving gas output from the gas cylinder enters the booster pump through the high-pressure hose and the second pipeline.

4. The high-pressure nitrogen charging system according to claim 3, characterized in that: The inflatable fixture comprises: The main body has an air inlet on one side thereof, and the air inlet is connected to the first pipeline through a high-pressure hose; A first interface, installed at the bottom of the body and connected to the air inlet, the first interface is used to connect to the air inlet interface of the narrow metal container; A push rod assembly is mounted on the top of the body, and the push rod assembly is rotated to open the protection mechanism at the air inlet interface; The first stop valve is installed on the other side of the main body, and the connection passage between the air inlet and the first interface is opened or closed by the first stop valve, and the inflation rate between the air inlet and the first interface is adjusted.

5. The high-pressure nitrogen charging system according to claim 4, characterized in that: The inflation jig further includes: a digital pressure gauge, which is mounted on the main body and located on the side opposite to the air inlet, and the pressure value in the cavity of the narrow metal container is monitored and displayed in real time by the digital pressure gauge.

6. The high-pressure nitrogen gas charging system according to claim 5, characterized in that: The gas distribution console comprises: A cabinet, wherein the booster pump, the first pipeline and the second pipeline are arranged in the cabinet; At least one second stop valve, installed on the first pipeline and the second pipeline respectively; At least one pressure reducing valve installed on the first pipeline and the second pipeline; A control panel is installed on the cabinet, and the second stop valve is controlled by the control panel to adjust the on-off and flow rate of the first pipeline and the second pipeline, and the pressure reducing valve is controlled by the control panel to adjust the gas pressure of the first pipeline and the second pipeline.

7. The high-pressure nitrogen gas charging system according to claim 6, characterized in that: A high-pressure nitrogen inlet, a driving gas inlet, a high-pressure nitrogen outlet and an exhaust port are provided on one side of the cabinet, the high-pressure nitrogen inlet is connected to the first pipeline and the first adapter, the driving gas inlet is connected to the second pipeline and the second adapter, the high-pressure nitrogen outlet is connected to the inlet, and the exhaust port is connected to the first pipeline.

8. The high-pressure nitrogen gas charging system according to claim 3, characterized in that: The ejector assembly comprises: A push rod handle is mounted on the top of the main body and one end of the push rod handle extends into the main body; An ejector pin, one end of which is connected to one end of the ejector rod handle, is used for rotating the ejector rod handle so that the ejector pin is retracted into or extended out of the first interface, and the ejector pin is extended out of the first interface to open the protective mechanism at the air inlet interface.

9. A high-pressure nitrogen filling method suitable for a narrow metal container, characterized in that: include: Pipeline construction steps: construct a first pipeline connecting the working gas source and the gas distribution console, an inflation pipeline of the inflation fixture and the narrow metal container, and construct a second pipeline connecting the driving gas source and the gas distribution console and a booster pipeline of the booster pump; Inflating step: opening the working gas source and filling the narrow metal container with high-pressure nitrogen through the inflation pipeline to adjust the pressure value of the narrow metal container to an intermediate pressure value; Pressurization step: open the driving gas source to drive the booster pump to work through the booster pipeline, and use the booster pump to pressurize the high-pressure nitrogen output by the working gas source and then fill it into the narrow metal container, so that the pressure value in the narrow metal container reaches the target pressure value.

10. The high-pressure nitrogen charging method according to claim 9, characterized in that: The inflation step comprises: Controlling and adjusting the on / off, flow rate and gas pressure of the first pipeline through the gas distribution console; The pressurization step comprises: The on-off, flow rate and gas pressure of the second pipeline are controlled and adjusted by the gas distribution console.

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