Universal multi-path nitrogen charging device for metal packaging box

Abstract

The utility model discloses a universal multi-path nitrogen charging device for a metal packaging box. The universal multi-path nitrogen charging device comprises a main shell (1), an input assembly (2), a gas distribution assembly (3) and an output assembly (4), the input assembly (2) is composed of at least one nitrogen input gas path, the output assembly (4) is composed of at least one nitrogen output gas path, and the input assembly (2) is connected with the output assembly (4) through the gas distribution assembly (3). According to the nitrogen filling device, the nitrogen filling working efficiency is improved, and the universal adaptability of the device with different nitrogen sources and different metal packaging boxes is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to metal packaging box nitrogen filling technical field, concretely is a kind of metal packaging box general multiway nitrogen filling device. BACKGROUND

[0002] Nitrogen is a kind of sex gas, no corrosive, not easy to react with other elements, with strong stability and antioxidant property. In the industrial field, nitrogen is often used as a kind of protective gas, fills to sealed metal packaging box, plays the role of moisture-proof, anticorrosive, antioxidation, so that precision instruments and electronic equipment in sealed metal packaging box are in good sealed state, ensure its long-term sealed quality reliable.

[0003] In the existing metal packaging box nitrogen filling technology, special gas input connector is usually used to connect with nitrogen cylinder, high-pressure nitrogen is reduced by pressure reducing valve, and then input into metal packaging box through high-pressure gas pipe. Among them, the gas input connector cannot be directly connected with common nitrogen vehicle, and the universality is not good. High-pressure nitrogen is only reduced by one stage, and the possibility of gas backflow during nitrogen filling is not considered in each input and output gas path, and the safety margin is insufficient. Only a single metal packaging box can be filled with nitrogen at a time, and the output gas pipe is connected with the metal packaging box in a threaded manner, which is inconvenient to disassemble, and the overall nitrogen filling efficiency is low. SUMMARY

[0004] The utility model aims at providing a new metal packaging box general multiway nitrogen filling device to improve the nitrogen filling work efficiency, and the universal adaptability between the device and different nitrogen sources and different metal packaging boxes, and increase the work safety margin from the design source.

[0005] To achieve the above object, the utility model adopts the following technical scheme: a kind of metal packaging box general multiway nitrogen filling device, including main casing, input component, gas distribution component and output component are made of at least one nitrogen input gas path, the output component is connected with output component by gas distribution component, wherein the external input gas pipe adapter of the output component is installed on the outer surface of main casing one side, the input gas pipe adapter is connected with the input gas pipe adapter and placed in the inside of main casing, and the other end is connected with the input port of the input gas pressure gauge, the first-stage pressure reducing valve and the first-stage pressure reducing valve rear-end output gas pressure gauge fixed on the upper surface of main casing in sequence, and the input gas path of nitrogen filling device is formed.

[0006] Further, the gas distribution assembly is placed entirely inside the main housing, and the output gas pipe at the rear end of the first-stage pressure reducing valve is connected to the output gas pressure gauge at the rear end of the first-stage pressure reducing valve in the input assembly through a threaded taper joint. The rear end is sequentially connected to the front-end pneumatic one-way check valve of the airflow distributor, the front-end input gas pipe of the airflow distributor, and fixed to the input port of the airflow distributor through the front-end threaded right-angle quick connector of the airflow distributor. The output port of the airflow distributor is fixed to the rear-end output gas pipe of the airflow distributor through the rear-end threaded right-angle quick connector of the airflow distributor, and sequentially connected to the rear-end pneumatic one-way check valve of the airflow distributor, the front-end input gas pipe of the second-stage pressure reducing valve, and connected to the second-stage pressure reducing valve in the output assembly through the front-end threaded right-angle quick connector of the second-stage pressure reducing valve.

[0007] Further, the output assembly, in which the second-stage pressure reducing valve and the rear-end output gas pressure gauge of the second-stage pressure reducing valve are connected, are fixed on the upper surface of the main housing. The rear-end output gas pressure gauge of the second-stage pressure reducing valve is connected to one end of the rear-end output gas pipe of the second-stage pressure reducing valve placed inside the main housing through the rear-end threaded right-angle quick connector of the second-stage pressure reducing valve. The male head of the quick connector is connected to the other end of the rear-end output gas pipe of the second-stage pressure reducing valve and fixed on the other side of the outer surface of the main housing. The female head of the quick connector is connected to one end of the external output gas pipe outside the nitrogen charging device. The other end of the external output gas pipe is fixed with a quick-release inflation chuck, which is clamped on the inflation adapter, to form an output gas path of the nitrogen charging device for filling nitrogen into the metal packaging box.

[0008] Further, the main housing is built and assembled in the form of "inner frame + outer housing", and materials such as aluminum alloy and stainless steel that are not prone to rust are selected to ensure the firmness of the main housing and the protection of the internal components.

[0009] Further, the input gas path formed by the connection of the input assembly is one input gas path that can be independently adjusted and controlled in the nitrogen charging device. By setting multiple sets of input assemblies containing the same types, same numbers, and same or different sizes of components, multiple independent nitrogen input gas paths can be assembled to achieve multiple nitrogen input from the same or different nitrogen sources.

[0010] Further, the output gas path formed by the connection of the output assembly is one output gas path that can be independently adjusted and controlled in the nitrogen charging device. By setting multiple sets of output assemblies containing the same types, same numbers, and same or different sizes of components, multiple independent nitrogen output gas paths can be assembled to achieve nitrogen output to multiple same or different metal packaging boxes.

[0011] Further, in the gas distribution assembly, the number of input and output ports of the airflow distributor is consistent with the number of input and output gas paths of the nitrogen charging device.

[0012] Further, the pressure resistance value of the input gas pipe at the front end of the first-stage pressure reducing valve in the selected input assembly must be greater than the maximum output pressure of the nitrogen source; the pressure display range of the input gas pressure gauge at the front end of the first-stage pressure reducing valve in the selected input assembly must be wider than the output pressure range of the nitrogen source; and the pressure display range of the output gas pressure gauge at the rear end of the first-stage pressure reducing valve in the selected input assembly must be consistent with the adjustment range of the first-stage pressure reducing valve.

[0013] Further, the pressure resistance value of the output gas pipe at the rear end of the first-stage pressure reducing valve, the pneumatic one-way check valve at the front end of the gas flow distributor, the input gas pipe at the front end of the gas flow distributor, the output gas pipe at the rear end of the gas flow distributor, the pneumatic one-way check valve at the rear end of the gas flow distributor and the input gas pipe at the front end of the second-stage pressure reducing valve in the selected gas distribution assembly must be greater than the maximum output pressure of the nitrogen gas after the adjustment of the first-stage pressure reducing valve.

[0014] Further, the adjustment range of the second-stage pressure reducing valve and the display range of the output gas pressure gauge at the rear end of the second-stage pressure reducing valve in the selected output assembly should meet the requirements of the nitrogen filling pressure range of the metal packaging box; and the pressure resistance value of the output gas pipe at the rear end of the second-stage pressure reducing valve and the external output gas pipe in the selected output assembly should be greater than the maximum output pressure of the nitrogen gas after the adjustment of the second-stage pressure reducing valve.

[0015] Further, the external input gas pipe adapter should be customized according to the specifications and sizes of the nitrogen source output gas pipe joint and the input gas pipe at the front end of the first-stage pressure reducing valve.

[0016] Further, the inflation adapter should be customized according to the specifications and sizes of the inflation nozzle of the metal packaging box to be filled with nitrogen, and should be used in combination with the quick-release inflation chuck.

[0017] Compared with the prior art, the utility model has the following advantages: (1) the number of input and output gas paths of the nitrogen filling device is increased by adopting multiple shunt designs, a plurality of nitrogen sources can be externally connected at the same time, and a plurality of metal packaging boxes can be filled with nitrogen, thereby improving the nitrogen filling work efficiency; (2) the opening and closing of each input and output gas path of the nitrogen filling device and the nitrogen pressure therein can be independently controlled and adjusted, one or more nitrogen sources or metal packaging boxes on a gas path can be replaced individually without affecting the work of other gas paths, and the nitrogen filling convenience and flexibility are ensured; (3) the external input gas pipe adapter and the inflation adapter that meet the specification size requirements are customized and processed, thereby solving the interface matching problem between the nitrogen filling device and different nitrogen sources and metal packaging boxes; (4) the two-stage pressure reducing design and the pneumatic one-way check valve installed at the front and rear ends of each gas path of the gas distributor improve the safety margin of the nitrogen filling work under the condition that the pressure reducing valve fails, and prevent the problem of nitrogen backflow caused by uneven gas pressure; (5) the quick-release inflation chuck is selected, thereby improving the disassembly and assembly efficiency between the output gas pipe and the metal packaging box. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a general structure and gas path composition connection schematic diagram of the utility model.

[0019] Figure 2 It is a general structure and gas path composition connection schematic diagram of the utility model one embodiment (2-way input, 6-way output). DETAILED DESCRIPTION

[0020] The utility model is further explained in the following in combination with the specification.

[0021] In combination with Figure 1 The metal packaging box universal multi-way nitrogen filling device comprises a main shell, an input assembly, a gas distribution assembly and an output assembly.

[0022] The reference signs in the drawings are as follows: 1, main shell; 2, input assembly; 3, gas distribution assembly; 4, output assembly; 5, external input gas pipe adapter; 6, I-stage pressure reducing valve front end input gas pipe; 7, I-stage pressure reducing valve front end input gas pressure gauge; 8, I-stage pressure reducing valve; 9, I-stage pressure reducing valve rear end output gas pressure gauge; 10, threaded tower joint; 11, I-stage pressure reducing valve rear end output gas pipe; 12, front end pneumatic one-way check valve of gas flow distributor; 13, front end input gas pipe of gas flow distributor; 14, front end threaded right-angle quick joint of gas flow distributor; 15, gas flow distributor; 16, rear end threaded right-angle quick joint of gas flow distributor; 17, rear end output gas pipe of gas flow distributor; 18, rear end pneumatic one-way check valve of gas flow distributor; 19, II-stage pressure reducing valve front end input gas pipe; 20, II-stage pressure reducing valve front end threaded right-angle quick joint; 21, II-stage pressure reducing valve; 22, II-stage pressure reducing valve rear end output gas pressure gauge; 23, II-stage pressure reducing valve rear end threaded right-angle quick joint; 24, II-stage pressure reducing valve rear end output gas pipe; 25, quick plug joint (each set comprises one male head and one female head); 26, external output gas pipe; 27, quick dismounting type inflation clamp head; 28, inflation adapter.

[0023] The main shell is used for mounting, placing and protecting the internal assemblies of the nitrogen filling device, adopts a box type structure, is composed of an inner frame and an outer shell, and can be optionally provided with an inner partition plate, universal wheels and a handle.

[0024] The inner frame is made of aluminum alloy profile, and the frames are fixedly connected through corner pieces, so that the assembly is facilitated and the firmness of the overall frame is ensured.

[0025] The outer shell and the inner partition plate are made of stainless steel, so that the rust resistance is improved, the influence of the external environment on the internal assemblies is reduced, the main shell is divided into upper and lower layers through the partition plate, the upper layer is used as an internal assembly mounting space, and the lower layer is designed to have double doors and is used for storing gas pipes, adapters and other spare accessories.

[0026] The universal wheels and the handle are respectively arranged at the bottom and the two sides of the box body, so that the portability of the nitrogen filling device is improved.

[0027] The input component consists of an external input air pipe adapter, an input air pipe at the front end of the Class I pressure reducing valve, an input pressure gauge at the front end of the Class I pressure reducing valve, the Class I pressure reducing valve, and an output pressure gauge at the rear end of the Class I pressure reducing valve.

[0028] An external input gas pipe adapter is installed on one side of the outer surface of the main housing. One end of the input gas pipe at the front end of the Class I pressure reducing valve is connected to it and placed inside the main housing. The other end is connected to the input port of the input pressure gauge at the front end of the Class I pressure reducing valve, the Class I pressure reducing valve, and the output pressure gauge at the rear end of the Class I pressure reducing valve, which are fixed on the upper surface of the main housing. Finally, the external nitrogen source is assembled to form the input gas path to the nitrogen charging device, and the input nitrogen is depressurized for the first time on this gas path.

[0029] Based on the above-mentioned single gas path connection relationship, by setting up multiple sets of input components containing the same type, the same quantity, and the same or different specifications and sizes of the above-mentioned parts, multiple independent nitrogen input gas paths can be assembled to realize multiple nitrogen inputs from the same or different nitrogen sources.

[0030] External input gas pipe adapters need to be custom-made and made of stainless steel. In addition, considering that the nitrogen cylinder or nitrogen vehicle outputs nitrogen at a relatively high pressure, both ends of the adapter should be threaded. The specifications and dimensions should be compatible with the nitrogen source output gas pipe connector and the input gas pipe at the front end of the Class I pressure reducing valve to be suitable for different nitrogen sources and improve the versatility of the nitrogen filling device.

[0031] The inlet gas pipe at the front end of the Class I pressure reducing valve should be made of stainless steel or PU high-pressure gas pipe, taking into account the requirements of explosion-proof, wear-resistant, aging-resistant, and wide-temperature operation. The pressure resistance value must be greater than the maximum output pressure of the nitrogen source.

[0032] The Class I pressure reducing valve and its upstream input and downstream output pressure gauges are typically integrated products for easy compatibility. The upstream input pressure gauge of the Class I pressure reducing valve displays the nitrogen source output pressure; its pressure display range must be wider than the nitrogen source output pressure range. The Class I pressure reducing valve is used for the initial pressure reduction of nitrogen in this gas line. The downstream output pressure gauge of the Class I pressure reducing valve displays the nitrogen pressure value after the initial pressure reduction; its pressure display range must be consistent with the adjustment range of the Class I pressure reducing valve.

[0033] The gas distribution assembly consists of a threaded pagoda connector, a Class I pressure reducing valve output pipe, a pneumatic one-way check valve at the front of the airflow distributor, an input pipe at the front of the airflow distributor, a threaded right-angle quick-connect connector at the front of the airflow distributor, the airflow distributor, a threaded right-angle quick-connect connector at the rear of the airflow distributor, an output pipe at the rear of the airflow distributor, a pneumatic one-way check valve at the rear of the airflow distributor, an input pipe at the front of the Class II pressure reducing valve, and a threaded right-angle quick-connect connector at the front of the Class II pressure reducing valve.

[0034] The gas distribution assembly is placed in the main housing, and the rear end output gas pipe of the first-stage pressure reducing valve is connected to the rear end output pressure gauge of the first-stage pressure reducing valve in the input assembly through a threaded taper joint. The rear end is sequentially connected to the front end pneumatic one-way check valve of the flow distributor, the front end input gas pipe of the flow distributor, and the front end input port of the flow distributor through a threaded right-angle quick joint. The output port of the flow distributor is fixedly connected to the rear end output gas pipe of the flow distributor through a threaded right-angle quick joint at the rear end of the flow distributor. The rear end pneumatic one-way check valve of the flow distributor, the front end input gas pipe of the second-stage pressure reducing valve, and the second-stage pressure reducing valve in the output assembly are sequentially connected through a threaded right-angle quick joint at the front end of the second-stage pressure reducing valve. The nitrogen gas entering the nitrogen filling device through the input assembly can be redistributed by the gas distribution assembly to form a plurality of gas paths at the front end of the output assembly.

[0035] According to the connection relationship of the single gas path, by setting the same type, same number, same or different size of the other components in the gas distribution assembly except the flow distributor on each gas path, while ensuring that the number of the input and output ports of the flow distributor is consistent with the number of the input and output gas paths of the nitrogen filling device, the redistribution of the multi-path input and output nitrogen gas can be realized.

[0036] The threaded taper joint, the front end and rear end of the flow distributor, and the threaded right-angle quick joint at the front end of the second-stage pressure reducing valve are made of copper or stainless steel, and are used for the connection between the rear end output gas pipe of the first-stage pressure reducing valve and the rear end output pressure gauge of the first-stage pressure reducing valve, the front end input gas pipe of the flow distributor and the input port of the flow distributor, the output port of the flow distributor and the rear end output gas pipe of the flow distributor, and the front end input gas pipe of the second-stage pressure reducing valve and the second-stage pressure reducing valve.

[0037] The rear end output gas pipe of the first-stage pressure reducing valve, the front end input gas pipe of the flow distributor, the rear end output gas pipe of the flow distributor, and the front end input gas pipe of the second-stage pressure reducing valve are high-pressure gas pipes made of stainless steel or PU, which are explosion-proof, wear-resistant, aging-resistant, and wide-temperature-resistant, and the pressure resistance value must be greater than the maximum output pressure of the nitrogen gas after the adjustment of the first-stage pressure reducing valve.

[0038] The front end pneumatic one-way check valve of the flow distributor is installed between the rear end output gas pipe of the first-stage pressure reducing valve and the front end input gas pipe of the flow distributor, and the rear end pneumatic one-way check valve of the flow distributor is installed between the rear end output gas pipe of the flow distributor and the front end input gas pipe of the second-stage pressure reducing valve. When the nitrogen gas flows from the first-stage pressure reducing valve to the flow distributor, or from the flow distributor to the second-stage pressure reducing valve, the valve body is opened, and the nitrogen gas can be normally supplied from the input assembly to the output assembly through the gas distribution assembly. On the contrary, when the nitrogen gas backflows in the plurality of gas paths between the first-stage pressure reducing valve, the flow distributor, and the second-stage pressure reducing valve, the valve body is closed, and the nitrogen gas cannot backflow, which will not affect the gas pressure of other gas paths, and the problem of unstable gas pressure caused by backflow of nitrogen gas in the nitrogen filling work is eliminated.

[0039] The gas flow distributor is made of aluminum alloy material, and the number of input and output ports should be consistent with the number of input and output gas paths of the nitrogen filling device to realize multi-path input and output of the nitrogen filling device.

[0040] The output assembly is composed of a second-stage pressure reducing valve, a second-stage pressure reducing valve rear-end output pressure gauge, a second-stage pressure reducing valve rear-end threaded right-angle quick connector, a second-stage pressure reducing valve rear-end output gas pipe, a quick plug connector (each set including one male and one female head), an external output gas pipe, a quick-release inflation clamp head, and an inflation adapter.

[0041] The second-stage pressure reducing valve and the second-stage pressure reducing valve rear-end output pressure gauge are fixed on the upper surface of the main housing. The second-stage pressure reducing valve rear-end output pressure gauge is connected to one end of the second-stage pressure reducing valve rear-end output gas pipe placed inside the main housing through the second-stage pressure reducing valve rear-end threaded right-angle quick connector. The male head of the quick plug connector is connected to the other end of the second-stage pressure reducing valve rear-end output gas pipe and fixed on the other side of the outer surface of the main housing. The female head of the quick plug connector is connected to one end of the external output gas pipe outside the nitrogen filling device. The other end of the external output gas pipe is fixed with the quick-release inflation clamp head, which is clamped on the inflation adapter. Finally, the nitrogen filling device output gas path to the metal packaging box is formed, and the nitrogen gas in the path is subjected to a second pressure reduction. The nitrogen gas meeting the nitrogen filling working pressure range requirements is output to the metal packaging box.

[0042] According to the above single gas path connection relationship, multiple independent nitrogen gas output gas paths can be formed by setting multiple output assemblies containing the same type, same number, same or different specifications and sizes of the above-mentioned components, realizing the output of nitrogen gas to multiple same or different metal packaging boxes.

[0043] The second-stage pressure reducing valve and the second-stage pressure reducing valve rear-end output pressure gauge can usually be selected as integrated products for convenient matching use. The second-stage pressure reducing valve is used for the second pressure reduction of nitrogen gas. The second-stage pressure reducing valve rear-end output pressure gauge is used for displaying the nitrogen gas pressure value after the second pressure reduction. The adjustment range of the second-stage pressure reducing valve and the display range of the second-stage pressure reducing valve rear-end output pressure gauge should meet the metal packaging box nitrogen filling pressure range requirements.

[0044] The second-stage pressure reducing valve rear-end threaded right-angle quick connector is made of stainless steel material and is used for the connection between the output port of the second-stage pressure reducing valve and the second-stage pressure reducing valve rear-end output gas pipe.

[0045] The second-stage pressure reducing valve rear-end output gas pipe and the external output gas pipe are made of high-pressure gas pipes of stainless steel or PU material, considering explosion-proof, wear resistance, aging resistance, and wide temperature use requirements. The pressure resistance value should be greater than the maximum output pressure of nitrogen gas after the adjustment of the second-stage pressure reducing valve. The length of the external output gas pipe should consider the convenience of nitrogen filling work.

[0046] The quick connector includes one male head and one female head, and the male head and the female head are connected by self-locking quick connection mode.

[0047] The quick-release type inflation chuck can be quickly connected with the inflation adapter, and the operation efficiency of disassembly is improved under the premise of ensuring airtightness and safety.

[0048] The inflation adapter needs to be customized and processed, and one end is connected with the inflation chuck, and the other end should be matched with the metal packaging box inflation nozzle in size and connection mode, so that the nitrogen charging is suitable for different types of metal packaging boxes, and the universality of the nitrogen charging device is improved.

[0049] The specific embodiments of the metal packaging box universal multi-way nitrogen charging device will be described below with reference to the accompanying drawings. Figure 2 The embodiment is a two-way nitrogen input and six-way nitrogen output, which is only one specific example of the utility model patent, and the technical solution provided by the utility model does not affect the determination of the specific number of nitrogen input and output. In addition, the composition, shape and material of the main shell of the nitrogen charging device have been described in the foregoing utility model content, and only the firmness of the internal components of the device and the convenience of use need to be met, without other special requirements, so further description is not given.

[0050] As shown in the drawings, Figure 2As shown, the 2-input, 6-output metal packaging box general multi-way nitrogen filling device includes a main shell 1, two sets of input assemblies 2, a gas distribution assembly 3 and six sets of output assemblies 4. Each set of input assembly 2 is composed of an external input gas pipe adapter 5, a first-stage pressure reducing valve front-end input gas pipe 6, a first-stage pressure reducing valve front-end input gas pressure gauge 7, a first-stage pressure reducing valve 8 and a first-stage pressure reducing valve rear-end output gas pressure gauge 9. The gas distribution assembly 3 is composed of two threaded tower joints 10, two first-stage pressure reducing valve rear-end output gas pipes 11, two airflow distributor front-end pneumatic one-way check valves 12, two airflow distributor front-end input gas pipes 13, two airflow distributor front-end threaded right-angle quick couplings 14, an airflow distributor 15, six airflow distributor rear-end threaded right-angle quick couplings 16, six airflow distributor rear-end output gas pipes 17, six airflow distributor rear-end pneumatic one-way check valves 18, six second-stage pressure reducing valve front-end input gas pipes 19 and six second-stage pressure reducing valve front-end threaded right-angle quick couplings 20. Each set of output assembly 4 is composed of a second-stage pressure reducing valve 21, a second-stage pressure reducing valve rear-end output gas pressure gauge 22, a second-stage pressure reducing valve rear-end threaded right-angle quick coupling 23, a second-stage pressure reducing valve rear-end output gas pipe 24, a quick plug-in adapter 25 (including one male head and one female head), an external output gas pipe 26, a quick-release type inflation chuck 27 and an inflation adapter 28.

[0051] The Figure 2 The two external input gas pipe adapters 5 (threaded, the size and dimension are matched with the nitrogen source output gas pipe adapter and the first-stage pressure reducing valve front-end input gas pipe 6) are fixedly installed on one side of the outer surface of the main shell 1, and each is connected with one first-stage pressure reducing valve front-end input gas pipe 6 (made of stainless steel or PU, the pressure resistance value is greater than the maximum output pressure of the nitrogen source) from the inside of the main shell 1. The other end of each first-stage pressure reducing valve front-end input gas pipe 6 is sequentially connected with one first-stage pressure reducing valve front-end input gas pressure gauge 7 (the pressure display range must be wider than the output pressure range of the nitrogen source), one first-stage pressure reducing valve 8 and one first-stage pressure reducing valve rear-end output gas pressure gauge 9 (the pressure display range must be consistent with the adjustment range of the first-stage pressure reducing valve 8). The display and adjustment positions of the first-stage pressure reducing valve front-end input gas pressure gauge 7, the first-stage pressure reducing valve 8 and the first-stage pressure reducing valve rear-end output gas pressure gauge 9 are installed and placed on the upper surface of the main shell 1. According to the above connection relationship, two nitrogen input gas paths are assembled.

[0052] The high-pressure nitrogen gas output by two nitrogen sources is divided into two paths, flows through the external input gas pipe adapters 5, enters the inside of the nitrogen filling device, passes through the first-stage pressure reducing valve front-end input gas pipes 6, and the pressure value is displayed on the first-stage pressure reducing valve front-end input gas pressure gauges 7. After the first-stage pressure reducing valves 8 reduce the pressure for the first time, the pressure value is displayed on the first-stage pressure reducing valve rear-end output gas pressure gauges 9.

[0053] By setting 2 input gas paths, two nitrogen sources can be input simultaneously, improving the number of nitrogen sources and the input end gas supply capacity; more importantly, when one of the gas sources is consumed to a certain gas pressure value and cannot continue to fill nitrogen into the packaging box (a certain gas pressure needs to be left in the gas cylinder to prevent gas backflow and cause the gas cylinder to be contaminated), the first-stage pressure reducing valve 8 on the gas path can be directly closed, and since the other gas source can still supply gas, it will not affect the nitrogen filling work, thereby realizing the uninterrupted replacement of the nitrogen source.

[0054] It should be noted that if the nitrogen gas pressure range and output pipe joint specifications and sizes of the two nitrogen sources are different, the corresponding I-stage pressure reducing valve front-end input gas pipe 6, I-stage pressure reducing valve front-end input gas pressure gauge 7, I-stage pressure reducing valve 8 and I-stage pressure reducing valve rear-end output gas pressure gauge 9 need to be installed on the two input gas paths, but the types and quantities of the above-mentioned parts do not affect the structure, position relationship and connection relationship in the technical scheme of the utility model.

[0055] The gas distribution assembly 3 is all installed and placed inside the main housing 1. The output ports of the two I-stage pressure reducing valve rear-end output gas pressure gauges 9 are respectively installed with a threaded tower joint 10 (copper or stainless steel material), which is connected with an I-stage pressure reducing valve rear-end output gas pipe 11 (stainless steel or PU material, the pressure resistance value must be greater than the maximum output pressure of nitrogen after adjustment of the I-stage pressure reducing valve 8) at the rear end of the I-stage pressure reducing valve rear-end output gas pressure gauge 9, which is in turn connected with a gas flow distributor front-end pneumatic check valve 12, an gas flow distributor front-end input gas pipe 13 (stainless steel or PU material, the pressure resistance value must be greater than the maximum output pressure of nitrogen after adjustment of the I-stage pressure reducing valve 8), and is fixedly connected with two input ports of a gas flow distributor 15 (aluminum alloy material, 8 holes) through a gas flow distributor front-end threaded right-angle quick coupling joint 14 (copper or stainless steel material). In the six output ends of the gas flow distributor 15, a gas flow distributor rear-end threaded right-angle quick coupling joint 16 (copper or stainless steel material) is installed, which is connected with a gas flow distributor rear-end output gas pipe 17 (stainless steel or PU material, the pressure resistance value must be greater than the maximum output pressure of nitrogen after adjustment of the I-stage pressure reducing valve 8), and is in turn connected with a gas flow distributor rear-end pneumatic check valve 18, an II-stage pressure reducing valve front-end input gas pipe 19 (stainless steel or PU material, the pressure resistance value must be greater than the maximum output pressure of nitrogen after adjustment of the I-stage pressure reducing valve 8), and is connected with an II-stage pressure reducing valve 21 in the output assembly 4 through an II-stage pressure reducing valve front-end threaded right-angle quick coupling joint 20 (copper or stainless steel material). According to the above connection relationship, six gas paths are formed at the front end of the output assembly 4.

[0056] After the nitrogen gas undergoes its first pressure reduction at the stage I pressure reducing valve 8, it is input into the gas distribution component 3 of the nitrogen filling device, completing the redistribution from 2 inputs to 6 outputs. Pneumatic one-way check valves 12 and 18 are installed at the front input and rear output gas lines of the gas distributor 15 to prevent nitrogen from flowing from the output gas line to the input gas line due to uneven gas pressure.

[0057] Each of the six output gas lines is equipped with a Class II pressure reducing valve 21 (adjustment range meets the nitrogen filling pressure requirements of the metal packaging box) and a Class II pressure reducing valve output pressure gauge 22 (display range meets the nitrogen filling pressure requirements of the metal packaging box). The display and adjustment parts of the Class II pressure reducing valve 21 and the Class II pressure reducing valve output pressure gauge 22 are all mounted on the upper surface of the main housing 1. The output port of the Class II pressure reducing valve output pressure gauge 22 is connected to a Class II pressure reducing valve output gas pipe 24 (made of stainless steel or PU, pressure resistant) via a Class II pressure reducing valve output right-angle quick-connect fitting 23. The pressure rating should be greater than the maximum nitrogen output pressure after adjustment by the Class II pressure reducing valve 21. A quick-connect connector 25 (male) is connected to the other end of the output gas pipe 24 at the rear end of the Class II pressure reducing valve and fixed to the other side of the outer surface of the main housing 1. A quick-connect connector 25 (female) is connected to one end of an external output gas pipe 26 (stainless steel or PU material, pressure rating should be greater than the maximum nitrogen output pressure after adjustment by the Class II pressure reducing valve 21) outside the nitrogen filling device. The other end of the external output gas pipe 26 is fixed with a quick-release inflation clamp 27, which is clamped onto an inflation adapter 28 (specifications and connection method matched to the inflation nozzle of the metal packaging box). According to the above connection relationship, the assembly forms 6 output gas paths from the nitrogen filling device to the metal packaging box.

[0058] After being redistributed from 2 inputs to 6 outputs, the nitrogen gas undergoes a second pressure reduction via the Class II pressure reducing valve 21. The pressure value is then displayed on the output pressure gauge 22 at the rear end of the Class II pressure reducing valve. The gas flows through the output gas pipe 24 at the rear end of the Class II pressure reducing valve and the external output gas pipe 26, filling the six metal packaging boxes.

[0059] By setting up 6 output gas paths, nitrogen can be filled for 6 metal packaging boxes at the same time. More importantly, when some packaging boxes have been filled with nitrogen, the Class II pressure reducing valve 21 on the corresponding output gas path can be closed directly without affecting the nitrogen filling work of other metal packaging boxes, thus realizing uninterrupted gas replacement of metal packaging boxes.

[0060] It should be noted that if the 6 or several metal packaging box nitrogen pressure range and the size of the gas nozzle specification is different, on the 6-way output gas path, the corresponding installation is required respectively using the matched Ⅱ level pressure reducing valve 21, Ⅱ level pressure reducing valve rear end output gas pressure gauge 22, Ⅱ level pressure reducing valve rear end output gas pipe 24, external output gas pipe 26, quick-disconnecting type gas filling chuck 27 and gas adapter 28, but the type and quantity of the above-mentioned parts are not affected, and the structure composition, position relationship and connection relationship in the technical scheme of the utility model are also applicable.

Claims

1. A general-purpose multi-channel nitrogen filling device for metal packaging containers, characterized by: The device comprises a main shell (1), an input assembly (2), a gas distribution assembly (3) and an output assembly (4). The input assembly (2) is composed of at least one nitrogen input gas path, and the output assembly (4) is composed of at least one nitrogen output gas path.

2. The universal multi-lane nitrogen filling device for metal packaging boxes according to claim 1, characterized in that: The input assembly (2) is characterized in that the external input gas pipe adapter (5) is installed on one side of the outer surface of the main shell (1), the one end of the front-end input gas pipe (6) of the first-stage pressure reducing valve is connected with the input gas pipe adapter (5) and placed inside the main shell (1), and the other end is sequentially connected with the input port of the front-end input gas pressure gauge (7) of the first-stage pressure reducing valve, the first-stage pressure reducing valve (8) and the rear-end output gas pressure gauge (9) fixed on the upper surface of the main shell (1), thereby forming one nitrogen charging device input gas path.

3. The universal multi-lane nitrogen filling device for metal packaging boxes according to claim 1, characterized in that: The gas distribution assembly (3) is entirely installed and placed inside the main shell (1), the rear-end output gas pipe (11) of the first-stage pressure reducing valve is connected with the rear-end output gas pressure gauge (9) in the input assembly (2) through the threaded tower joint (10), the front-end pneumatic one-way check valve (12) of the gas flow distributor, the front-end input gas pipe (13) of the gas flow distributor are sequentially connected in the rear end, and the input port of the gas flow distributor (15) is fixedly connected with the gas flow distributor (15) through the front-end threaded right-angle quick joint (14) of the gas flow distributor, the output port of the gas flow distributor (15) is fixedly connected with the rear-end output gas pipe (17) of the gas flow distributor through the rear-end threaded right-angle quick joint (16) of the gas flow distributor, the rear-end pneumatic one-way check valve (18) of the gas flow distributor, the front-end input gas pipe (19) of the second-stage pressure reducing valve are sequentially connected, and the second-stage pressure reducing valve (21) in the output assembly (4) is connected through the front-end threaded right-angle quick joint (20) of the second-stage pressure reducing valve.

4. The universal multi-lane nitrogen filling device for metal packaging boxes according to claim 1, characterized in that: The output assembly (4) is characterized in that the second-stage pressure reducing valve (21) and the rear-end output gas pressure gauge (22) of the second-stage pressure reducing valve are connected, and both are fixed on the upper surface of the main shell (1), the rear-end output gas pipe (24) of the second-stage pressure reducing valve placed inside the main shell (1) is connected with the rear-end threaded right-angle quick joint (23) of the second-stage pressure reducing valve, the male head of the quick plug joint (25) is connected with the other end of the rear-end output gas pipe (24) of the second-stage pressure reducing valve and fixed on the other side of the outer surface of the main shell (1), the female head of the quick plug joint (25) is connected with the one end of the external output gas pipe (26) outside the nitrogen charging device, and the other end of the external output gas pipe (26) is fixed with the quick-release type inflation clamp head (27) clamped on the inflation adapter (28), thereby forming one nitrogen charging device output gas path.

5. The universal multi-lane nitrogen filling device for metal packaging boxes according to claim 1, characterized in that: The main shell (1) is built and assembled in the form of "inner frame + outer shell", and the material is selected from aluminum alloy and stainless steel.

6. The universal multi-lane nitrogen filling device for metal packaging boxes according to claim 1, 2 or 4, characterized in that: The input gas path connected by the input assembly (2) is an input gas path that can be independently adjusted and controlled in the nitrogen filling device. By setting multiple sets of input assemblies (2) containing the same type, same number, and same or different size components, multiple independent nitrogen input gas paths can be assembled to achieve multiple nitrogen input from the same or different nitrogen sources. The output gas path connected by the output assembly (4) is an output gas path that can be independently adjusted and controlled in the nitrogen filling device. By setting multiple sets of output assemblies (4) containing the same type, same number, and same or different size components, multiple independent nitrogen output gas paths can be assembled to achieve nitrogen output to multiple same or different metal packaging boxes.

7. The universal multi-lane nitrogen filling device for metal packaging boxes according to claim 1, 2 or 3, characterized in that: In the gas distribution assembly (3), the number of input and output ports of the flow distributor (15) is consistent with the number of input and output gas paths of the nitrogen filling device.

8. The universal multi-lane nitrogen filling device for metal packaging boxes according to claim 2, characterized in that: The front-end input gas pipe (6) of the first-stage pressure reducing valve in the selected input assembly (2) must have a pressure resistance value greater than the maximum output pressure of the nitrogen source. The front-end input gas pressure gauge (7) of the first-stage pressure reducing valve in the selected input assembly (2) must have a pressure display range wider than the output pressure range of the nitrogen source. The rear-end output gas pressure gauge (9) of the first-stage pressure reducing valve in the selected input assembly (2) must have a pressure display range consistent with the adjustment range of the first-stage pressure reducing valve (8). The external input gas pipe adapter (5) should be customized according to the specifications and sizes of the nitrogen source output gas pipe joint and the front-end input gas pipe (6) of the first-stage pressure reducing valve.

9. The universal multi-lane nitrogen filling device for metal packaging boxes according to claim 2 or 3, characterized in that: The rear-end output gas pipe (11) of the first-stage pressure reducing valve, the front-end pneumatic one-way check valve (12) of the flow distributor, the front-end input gas pipe (13) of the flow distributor, the rear-end output gas pipe (17) of the flow distributor, the rear-end pneumatic one-way check valve (18) of the flow distributor, and the front-end input gas pipe (19) of the second-stage pressure reducing valve in the selected gas distribution assembly (3) must have a pressure resistance value greater than the maximum output pressure of the nitrogen gas after the adjustment of the first-stage pressure reducing valve (8).

10. The universal multi-lane nitrogen filling device for metal packaging boxes according to claim 4, characterized in that: The adjustment range of the second-stage pressure reducing valve (21) and the display range of the rear-end output gas pressure gauge (22) of the second-stage pressure reducing valve in the selected output assembly (4) should meet the requirements of the nitrogen filling pressure range of the metal packaging box. The pressure resistance values of the rear-end output gas pipe (24) of the second-stage pressure reducing valve and the external output gas pipe (26) in the selected output assembly (4) should be greater than the maximum output pressure of the nitrogen gas after the adjustment of the second-stage pressure reducing valve (21). The gas filling adapter (28) should be customized according to the specifications and sizes of the metal packaging box gas filling nozzle required for nitrogen filling and used with the quick-release gas filling chuck (27).

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