Nitrogen charging photoelectric load cabin and nitrogen charging device

Abstract

The utility model discloses a nitrogen charging photoelectric load cabin and a nitrogen charging device, the interior of the nitrogen charging photoelectric load cabin is used for installing photoelectric equipment, the nitrogen charging photoelectric load cabin comprises a cabin body, charging connector assemblies respectively installed at the upper end and the lower end of the cabin body, and shaft system assemblies respectively installed at the two sides of the cabin body, comprising a front cover, a middle cylinder and a rear cover which are sequentially arranged, first sealing pieces are arranged between the front cover and the middle cylinder and between the rear cover and the middle cylinder, and first through holes and second through holes are sequentially formed in the upper end, the lower end, the left side and the right side of the middle cylinder. The nitrogen charging photoelectric load cabin and the nitrogen charging device are low in cost, the gaps are sealed through the sealing pieces, the nitrogen charging photoelectric load cabin is in a good sealing state under the condition that nitrogen is not charged, and then a good sealing environment is provided for nitrogen charging; and the air tap at the upper end of the nitrogen-filled photoelectric load cabin is used for feeding air, and the air tap at the lower end of the nitrogen-filled photoelectric load cabin is used for discharging air, so that the equipment is more beneficial to nitrogen filling.

Description

Technical Field

[0001] The utility model belongs to the field of nitrogen filling equipment, and specifically relates to a nitrogen filling photoelectric load cabin and a nitrogen filling device. Background Art

[0002] The photoelectric turntable, also known as the photoelectric tracking turntable, can complete monitoring and detection work in harsh environments. As the core component of the photoelectric turntable, the photoelectric turntable load compartment is mainly used to install optical components of the photoelectric equipment, such as infrared lenses, white light lenses, sensor boards, etc. Optical components have high requirements for environmental humidity. On the one hand, if the load compartment is not sealed well, water can easily enter the optical lens barrel and the optical turntable, causing mold and condensation, causing the internal optical component film to fall off, the surface of the mechanical parts to corrode and rust, resulting in the performance of the photoelectric turntable to decline, or even damage, and reduce the service life of the equipment; on the other hand, when the equipment is installed, due to the principle of air humidity, there will inevitably be a certain amount of moisture inside the load compartment. When the equipment experiences high and low temperature environmental changes, it is easy to condense into fog on the window surface of the optical device in the load compartment, affecting optical imaging.

[0003] Nitrogen is a nearly inert gas. It is filled into the photoelectric load cabin to remove the humid gas in the optical sealed cabin and reduce the frost and fogging caused by the internal moisture of the product under low pressure or the sudden change after low temperature. The nitrogen filling device is also used to check the air tightness of the photoelectric detection equipment to ensure the product's requirements for its internal environment.

[0004] The existing patent CN208924367U is a photoelectric turntable with overcharge protection. It detects the nitrogen rushing in through a diaphragm safety valve to avoid safety risks and equipment damage caused by nitrogen overcharge. However, the structure of the diaphragm safety valve is relatively complex and generally requires special customization, which is expensive. In addition, the sealing performance of the equipment in the patent cannot be guaranteed, and nitrogen is prone to leakage.

[0005] The existing patent CN203554556U explosion-proof nitrogen-filled high-speed dome camera fills the load compartment with nitrogen. The nitrogen filling is to replace the air inside the load compartment, but it cannot guarantee that there is no air in the equipment and that the nitrogen in the equipment is full. Utility Model Content

[0006] The utility model aims to solve the problems raised in the background technology and proposes a nitrogen-filled photoelectric load cabin.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] The utility model proposes a nitrogen-filled photoelectric load cabin, the interior of which is used to install photoelectric equipment. The nitrogen-filled photoelectric load cabin includes a cabin body, an air filling nozzle assembly respectively installed at the upper and lower ends of the cabin body, and a shaft system assembly respectively installed at both sides of the cabin body, wherein:

[0009] The cabin body comprises a front cover, a middle tube and a rear cover which are arranged in sequence, a first sealing member is arranged between the front cover and the rear cover and the middle tube respectively, and a first through hole and a second through hole are arranged in sequence at the upper and lower ends and the left and right sides of the middle tube;

[0010] Each of the inflation nozzle assemblies comprises an air nozzle and a cover plate, wherein the air nozzle is threadedly connected to the inner wall of the middle tube and is located in the first through hole, and a second sealing member is provided between the air nozzle and the first through hole, and the cover plate is installed on the outer wall of the middle tube for sealing the first through hole, and a third sealing member is provided between the cover plate and the first through hole;

[0011] Each of the shaft system components includes a silicone rubber ring, a cable for connecting the optoelectronic device and a hollow central shaft, the central shaft is installed on the outer wall of the central cylinder and is located at the second through hole, and a fourth seal is provided between the central shaft and the central cylinder, the cable is passed through the central shaft, the silicone rubber ring is arranged between the inner wall of the central shaft and the cable, and is sleeved on the cable, and a fifth seal is provided between the central shaft, the silicone rubber ring and the cable.

[0012] Preferably, at least one visual window is provided on the front cover, and a sixth sealing member is provided between the visual window and the front cover.

[0013] Preferably, the air nozzle comprises a nozzle body and a valve core, the valve core is arranged in the nozzle body, and the nozzle body is threadedly connected to the inner wall of the middle cylinder.

[0014] Preferably, the inner diameter of the silicone rubber ring is smaller than the diameter of the cable, and the outer diameter of the silicone rubber ring is larger than the inner diameter of the central shaft.

[0015] Preferably, the silicone rubber ring is provided with an opening for facilitating the cable to pass through the silicone rubber ring.

[0016] Preferably, the first sealing member, the second sealing member, the third sealing member and the fourth sealing member are all sealing rings, and the fifth sealing member and the sixth sealing member are both glue.

[0017] A nitrogen filling device, comprising an air inlet assembly, an air outlet assembly and a nitrogen-filled photoelectric load cabin as claimed in any one of claims 1 to 4, wherein the air inlet assembly is detachably connected to the gas nozzle at the upper end of the nitrogen-filled photoelectric load cabin, and the air outlet assembly is detachably connected to the gas nozzle at the lower end of the nitrogen-filled photoelectric load cabin, wherein:

[0018] The air intake assembly includes a nitrogen bottle, a pressure reducing valve, a pressure gauge and an air charging head which are sequentially connected through a pipeline, and the air charging head is detachably connected to the air nozzle at the upper end of the middle cylinder;

[0019] The gas outlet assembly comprises a gas outlet head, a switch valve and a three-way pipe which are sequentially connected through pipelines, one branch of the three-way pipe is connected to a nitrogen analyzer, and the gas outlet head is detachably connected to the gas nozzle at the lower end of the middle tube.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] 1. The cost of the nitrogen-filled photoelectric load cabin and the nitrogen-filling device is low. The gaps are sealed by various sealing components, so that the nitrogen-filled photoelectric load cabin can be in a better sealing state when not filled with nitrogen, thereby providing a good sealing environment for nitrogen filling;

[0022] 2. The nitrogen filled in the nitrogen photoelectric load cabin can be used to remove the humid gas inside, so as to reduce the frosting and fogging caused by the internal moisture of the product at low pressure or the sudden change after low temperature. The air nozzle at the upper end of the nitrogen photoelectric load cabin is used for air intake, and the air nozzle at the lower end of the nitrogen photoelectric load cabin is used for air outlet. This equipment is more conducive to nitrogen filling;

[0023] 3. During the nitrogen filling process, wait for a few seconds before unscrewing the filling head to prevent external air from entering the nitrogen-filled photoelectric load cabin and to prevent nitrogen from leaking out, thereby replenishing nitrogen inside the nitrogen-filled photoelectric load cabin. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the nitrogen-filled photoelectric load cabin of the utility model;

[0025] Figure 2 This is an exploded view of the nitrogen-filled photoelectric load cabin of the utility model;

[0026] Figure 3 It is a cross-sectional view of the nitrogen-filled photoelectric load cabin of the utility model;

[0027] Figure 4 It is a schematic diagram of the silicone rubber ring of the utility model;

[0028] Figure 5 This is the block diagram of the practical nitrogen filling device.

[0029] Explanation of the reference numerals: 1. Cabin; 11. Front cover; 12. Middle tube; 13. Rear cover; 14. First sealing member; 15. First through hole; 16. Second through hole; 17. Visual window; 2. Inflating nozzle assembly; 21. Air nozzle; 22. Cover plate; 23. Second sealing member; 24. Third sealing member; 3. Shaft assembly; 31. Silicon rubber ring; 32. Cable; 33. Middle shaft; 34. Fourth sealing member; 35. Opening; 4. Nitrogen bottle; 5. Pressure reducing valve; 6. Pressure gauge; 7. Inflating head; 8. Air outlet head; 9. Switch valve. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] It should be noted that when a component is referred to as being "connected" to another component, it may be directly connected to the other component or there may be an intermediate component. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0032] Example 1

[0033] like Figure 1-4 As shown, a nitrogen-filled photoelectric load cabin is used to install photoelectric equipment. The nitrogen-filled photoelectric load cabin includes a cabin body 1, an air filling nozzle assembly 2 respectively installed at the upper and lower ends of the cabin body 1, and a shaft system assembly 3 respectively installed at both sides of the cabin body 1, wherein:

[0034] The cabin body 1 comprises a front cover 11, a middle tube 12 and a rear cover 13 which are arranged in sequence. A first sealing member 14 is provided between the front cover 11 and the rear cover 13 and the middle tube 12 respectively. The middle tube 12 is provided with a first through hole 15 and a second through hole 16 in sequence at the upper and lower ends and the left and right sides.

[0035] Each inflation nozzle assembly 2 includes an air nozzle 21 and a cover plate 22. The air nozzle 21 is threadedly connected to the inner wall of the middle tube 12 and is located in the first through hole 15. A second sealing member 23 is provided between the air nozzle 21 and the first through hole 15. The cover plate 22 is installed on the outer wall of the middle tube 12 to seal the first through hole 15. A third sealing member 24 is provided between the cover plate 22 and the first through hole 15.

[0036] Each shaft system component 3 includes a silicone rubber ring 31, a cable 32 for connecting the optoelectronic device and a hollow central shaft 33. The central shaft 33 is installed on the outer wall of the middle cylinder 12 and is located at the second through hole 16. A fourth seal 34 is provided between the central shaft 33 and the middle cylinder 12. The cable 32 is inserted into the central shaft 33. The silicone rubber ring 31 is arranged between the inner wall of the central shaft 33 and the cable 32 and is sleeved on the cable 32. A fifth seal is provided between the central shaft 33, the silicone rubber ring 31 and the cable 32.

[0037] It should be noted that the middle cylinder 12 is a hollow structure, and the inside is used to install optoelectronic equipment. The front and rear sides of the middle cylinder 12 are open. The front cover 11, the middle cylinder 12 and the rear cover 13 are fixedly connected in sequence (the front cover 11 and the rear cover 13 respectively seal the openings on the front and rear sides of the middle cylinder 12). The fixed connection method is not limited. In this embodiment, screws are used for fixed connection. The first sealing member 14 is fixedly installed between the front cover 11 and the rear cover 13 and the middle cylinder 12 respectively, so as to seal the gap between the front cover 11 and the rear cover 13 and the middle cylinder 12. The first through holes 15 are respectively located at the upper and lower sides of the middle cylinder 12. At two ends, the second through holes 16 are respectively located on the left and right sides of the middle cylinder 12; the air nozzle 21 located at the upper end of the middle cylinder 12 is used for air intake, and the air nozzle 21 located at the lower end of the middle cylinder 12 is used for air outlet. This arrangement (the air inlet is located at the upper end, and the air outlet is located at the lower end) is more conducive to nitrogen filling of the equipment because the density of nitrogen is less than that of air. The wall thickness of the middle cylinder 12 has a certain thickness, and the air nozzle 21 is threadedly connected to the inner wall of the middle cylinder 12 and is located in the first through hole 15, that is, the air nozzle 21 is located at one end of the first through hole 15 close to the inside of the middle cylinder 12, and is threadedly connected to the inner wall of the first through hole 15, through the first through hole 15 The second sealing member 23 is fixedly installed between the inner wall of the middle cylinder 12 and the air nozzle 21, so that the air tightness of the middle cylinder 12 is good. The cover plate 22 is fixedly installed on the outer wall of the middle cylinder 12 and can be installed by screws. The cover plate 22 is used to seal the first through hole 15. The third sealing member 24 is fixedly installed between the first through hole 15 and the cover plate 22 to further increase the sealing performance. In this embodiment, the upper and lower ends of the middle cylinder 12 are further provided with grooves, the first through hole 15 is located in the groove, the groove corresponds to the cover plate 22, and the cover plate 22 is covered on the groove to achieve sealing of the first through hole 15; the second through hole 16, the silicone rubber ring The central axes of the three are collinear, the silicone rubber ring 31 and the cable 32 are both made of soft and deformable materials, the silicone rubber ring 31 is a hollow cylinder, the central axis 33 is fixedly mounted on the outer side wall (left and right side walls) of the middle tube 12, and can be installed by screws, and the sealing is increased by the fourth sealing member 34, the cable 32 is first inserted into the silicone rubber ring 31, and then the silicone rubber ring 31 is installed in the central axis 33, and the cable 32 extends through the central axis 33 to the outside, and then the central axis 33, the silicone rubber ring 31 and the cable 32 are fixed by the fifth sealing member (i.e. glue) to achieve a sealing effect.

[0038] In this embodiment, at least one viewing window 17 is disposed on the front cover 11 , and a sixth sealing member is disposed between the viewing window 17 and the front cover 11 .

[0039] The front cover 11 is provided with a hole corresponding to the visual window 17. The visual window is installed in the hole and fixed by a sixth sealing member (i.e., glue, or a combination of a sealing ring and a cover plate). The setting of the visual window 17 facilitates observation of the optoelectronic equipment inside the middle tube 12.

[0040] In this embodiment, the air nozzle 21 includes a nozzle body and a valve core. The valve core is arranged in the nozzle body, and the nozzle body is threadedly connected to the inner wall of the middle tube 12 .

[0041] The valve 21 can use a French valve or a Schrader valve. For example, the present embodiment uses a Schrader valve. The valve core is normally closed. When the external inflator head is screwed into the nozzle body, the valve core is pressed and opened. At this time, the gas inside and outside the valve 21 can flow freely. The cover plate 22 is provided to prevent the valve 21 from being touched and opened, thereby increasing the sealing performance.

[0042] In this embodiment, the inner diameter of the silicone rubber ring 31 is smaller than the diameter of the cable 32 , and the outer diameter of the silicone rubber ring 31 is larger than the inner diameter of the central shaft 33 .

[0043] Since the silicone rubber ring 31 and the cable 32 are both made of soft and deformable materials, the inner diameter of the silicone rubber ring 31 is smaller than the diameter of the cable 32, and the outer diameter of the silicone rubber ring 31 is larger than the inner diameter of the central axis 33, so that the central axis 33, the silicone rubber ring 31 and the cable 32 are pressed against each other and have an interference fit, thereby achieving stable installation and improving the sealing effect.

[0044] In this embodiment, the silicone rubber ring 31 is provided with an opening 35 for the cable 32 to pass through the silicone rubber ring 31 .

[0045] Since the inner diameter of the silicone rubber ring 31 is smaller than the diameter of the cable 32, an opening 35 is provided on the silicone rubber ring 31, so that the cable 32 can be conveniently inserted into the silicone rubber ring 31. After the cable 32 is inserted into the silicone rubber ring 31, the silicone rubber ring 31 is installed into the central axis 33, and then glue is poured between the silicone rubber ring 31 and the central axis 33, as well as between the silicone rubber ring 31 and the cable 32, to ensure the sealing effect at the shaft system assembly 3.

[0046] In this embodiment, the first sealing member 14 , the second sealing member 23 , the third sealing member 24 and the fourth sealing member 34 are all sealing rings, or other sealing devices are used.

[0047] Example 2

[0048] On the basis of Example 1, Figure 5 As shown, a nitrogen filling device comprises an air inlet assembly, an air outlet assembly and the nitrogen-filled photoelectric load cabin in Example 1, wherein the air inlet assembly is detachably connected to the gas nozzle 21 at the upper end of the nitrogen-filled photoelectric load cabin, and the air outlet assembly is detachably connected to the gas nozzle 21 at the lower end of the nitrogen-filled photoelectric load cabin, wherein:

[0049] The air intake assembly includes a nitrogen bottle 4, a pressure reducing valve 5, a pressure gauge 6 and an air charging head 7 which are sequentially connected through pipelines. The air charging head 7 is detachably connected to the air nozzle 21 at the upper end of the middle tube 12. The nitrogen bottle 4, the pressure reducing valve 5 and the pressure gauge 6 can all be installed and supported by a mounting frame.

[0050] The gas outlet assembly includes a gas outlet head 8, a switch valve 9 and a three-way pipe which are connected in sequence through pipelines. One of the branches of the three-way pipe is connected to a nitrogen analyzer. The gas outlet head 8 is detachably connected to the gas nozzle 21 at the lower end of the middle tube 12. The switch valve 9, the three-way pipe and the nitrogen analyzer can all be installed and supported by a mounting frame.

[0051] It should be noted that, since the density of nitrogen is slightly lower than that of air, the air inlet assembly is arranged at the top of the nitrogen-filled photoelectric load cabin, and the air outlet assembly is arranged at the bottom of the nitrogen-filled photoelectric load cabin, so that this arrangement is more conducive to nitrogen filling; the inflating head 7 and the air outlet head 8 can be threadedly connected with the gas nozzle 21 (threadedly connected with the mouth body of the gas nozzle 21, when the inflating head 7 or the air outlet head 8 is screwed into the mouth body, the valve core is pressed open, and the gas inside and outside the gas nozzle 21 can flow freely);

[0052] Nitrogen filling process: After installing the charging head 7 and the outlet head 8, open the nitrogen bottle 4, and reduce the nitrogen pressure value output by the nitrogen bottle 4 through the pressure reducing valve 5. The pressure of the nitrogen output can be set to 0.3-0.4Mpa. The pressure value is read by the pressure gauge 6, which is convenient for the operator to know when the nitrogen starts to be output. Then the nitrogen enters the nitrogen-filled photoelectric load cabin through the charging head 7. As the nitrogen is filled, the air inside the nitrogen-filled photoelectric load cabin is squeezed to the outlet head 8 and discharged with the outlet head 8. It first passes through the switch valve 9. At this time, the switch valve 9 is in the open state, and the nitrogen can flow freely. The gas discharged from the nitrogen photoelectric load cabin is divided through the three-way pipe after exiting the switch valve 9, with one part discharged into the atmosphere and the other part entering the nitrogen analyzer. The nitrogen analyzer can detect the concentration of the nitrogen flowing in in real time. When the nitrogen content measured by the nitrogen analyzer is greater than 99% (so that the nitrogen inside the nitrogen-filled photoelectric load cabin is completely filled), the switch valve 9 is closed, the outlet head 8 is screwed out, and the valve core of the air nozzle 21 at the lower end of the middle cylinder 12 is closed at this time. After waiting for 3-5 seconds, the charging head 7 is screwed out, and the valve core of the air nozzle 21 at the upper end of the middle cylinder 12 is closed at this time, and the nitrogen filling of the nitrogen-filled photoelectric load cabin is completed. The reason for waiting for 3-5 seconds is that in the process of screwing out the outlet head 8, it is inevitable that a small amount of external air will enter the interior of the nitrogen-filled photoelectric load cabin from the air nozzle 21 at the lower end of the middle cylinder 12, and a small amount of nitrogen inside the nitrogen-filled photoelectric load cabin will leak out, so the nitrogen is supplemented for 3-5 seconds.

[0053] The nitrogen-filled photoelectric load cabin and the nitrogen-filling device have low costs. The gaps are sealed by various sealing components, so that the nitrogen-filled photoelectric load cabin can maintain a good sealing state when not filled with nitrogen, thereby providing a good sealing environment for nitrogen filling. The moist gas inside the nitrogen-filled photoelectric load cabin is removed by the filled nitrogen, thereby reducing the frost and fogging caused by the moisture inside the product during low pressure or the sudden change after low temperature. The air nozzle at the upper end of the nitrogen-filled photoelectric load cabin is used for air intake, and the air nozzle at the lower end of the nitrogen-filled photoelectric load cabin is used for air outlet, so that the equipment is more conducive to nitrogen filling. At the same time, during the nitrogen filling process, waiting for a few seconds before twisting out the inflation head is to prevent external air from entering the interior of the nitrogen-filled photoelectric load cabin and to prevent nitrogen from leaking out, thereby replenishing nitrogen inside the nitrogen-filled photoelectric load cabin.

[0054] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The above-described embodiments only express the more specific and detailed embodiments described in this application, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of this application, which all belong to the protection scope of this application. Therefore, the protection scope of the patent application shall be based on the attached claims.

Claims

1. A nitrogen-filled photovoltaic load cabin, the interior of which is used to install photovoltaic equipment, characterized in that: The nitrogen-filled photoelectric load cabin comprises a cabin body (1), an air filling nozzle assembly (2) respectively mounted at the upper and lower ends of the cabin body (1), and a shaft system assembly (3) respectively mounted at both sides of the cabin body (1), wherein: The cabin body (1) comprises a front cover (11), a middle tube (12) and a rear cover (13) which are arranged in sequence, a first sealing member (14) is provided between the front cover (11) and the rear cover (13) and the middle tube (12) respectively, and a first through hole (15) and a second through hole (16) are provided in sequence at the upper and lower ends and the left and right sides of the middle tube (12); Each of the inflation nozzle assemblies (2) comprises an air nozzle (21) and a cover plate (22); the air nozzle (21) is threadedly connected to the inner wall of the middle tube (12) and is located in the first through hole (15); a second sealing member (23) is provided between the air nozzle (21) and the first through hole (15); the cover plate (22) is installed on the outer wall of the middle tube (12) for sealing the first through hole (15); and a third sealing member (24) is provided between the cover plate (22) and the first through hole (15); Each of the shaft system components (3) comprises a silicone rubber ring (31), a cable (32) for connecting the optoelectronic device and a hollow central shaft (33); the central shaft (33) is mounted on the outer wall of the central cylinder (12) and is located at the second through hole (16); a fourth sealing member (34) is provided between the central shaft (33) and the central cylinder (12); the cable (32) is inserted into the central shaft (33); the silicone rubber ring (31) is arranged between the inner wall of the central shaft (33) and the cable (32) and is sleeved on the cable (32); and a fifth sealing member is provided between the central shaft (33), the silicone rubber ring (31) and the cable (32).

2. The nitrogen-filled photovoltaic load cabin according to claim 1, characterized in that: At least one visual window (17) is provided on the front cover (11), and a sixth sealing member is provided between the visual window (17) and the front cover (11).

3. The nitrogen-filled photovoltaic load cabin according to claim 1, characterized in that: The air nozzle (21) comprises a nozzle body and a valve core, wherein the valve core is arranged in the nozzle body, and the nozzle body is threadedly connected to the inner wall of the middle cylinder (12).

4. The nitrogen-filled photovoltaic load cabin according to claim 1, characterized in that: The inner diameter of the silicone rubber ring (31) is smaller than the diameter of the cable (32), and the outer diameter of the silicone rubber ring (31) is larger than the inner diameter of the central shaft (33).

5. The nitrogen-filled photovoltaic load cabin according to claim 1, characterized in that: The silicone rubber ring (31) is provided with an opening (35) for facilitating the cable (32) to pass through the silicone rubber ring (31).

6. The nitrogen-filled photovoltaic load cabin according to claim 2, characterized in that: The first sealing member (14), the second sealing member (23), the third sealing member (24) and the fourth sealing member (34) are all sealing rings, and the fifth sealing member and the sixth sealing member are both glue.

7. A nitrogen filling device, characterized in that: The nitrogen charging device comprises an air inlet assembly, an air outlet assembly and a nitrogen charging photoelectric load compartment according to any one of claims 1 to 6, wherein the air inlet assembly is detachably connected to the air nozzle (21) at the upper end of the nitrogen charging photoelectric load compartment, and the air outlet assembly is detachably connected to the air nozzle (21) at the lower end of the nitrogen charging photoelectric load compartment, wherein: The air intake assembly comprises a nitrogen bottle (4), a pressure reducing valve (5), a pressure gauge (6) and an air charging head (7) which are sequentially connected through a pipeline, and the air charging head (7) is detachably connected to the air nozzle (21) at the upper end of the middle cylinder (12); The gas outlet assembly comprises a gas outlet head (8), a switch valve (9) and a three-way pipe which are connected in sequence through pipelines, one branch of the three-way pipe is connected to a nitrogen analyzer, and the gas outlet head (8) is detachably connected to the gas nozzle (21) at the lower end of the middle cylinder (12).

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