A portable optical instrument nitrogen filling device

Abstract

This utility model proposes a portable nitrogen filling device for optical instruments, relating to the field of nitrogen protection technology. It includes a portable case containing a gas source chamber and an equipment chamber, with a handle on the top; a gas source unit installed in the gas source chamber and equipped with multiple high-pressure nitrogen cylinders; an electronic control device fixed in the equipment chamber, comprising a gas source pressure monitoring module and an instrument pressure monitoring module connected to the gas source unit; a controllable one-way valve, whose input end is connected to the output end of the instrument pressure monitoring module via a gas tube; a universal connector including a bottom-closed hollow metal docking cylinder, a needle-shaped metal tube, and a rotating claw mechanism sleeved on the outer wall of the metal docking cylinder, the needle-shaped metal tube penetrating the bottom center hole of the metal docking cylinder coaxially, and its tip extending to the top of the inner cavity of the metal docking cylinder; and a gas tube assembly, one end of which is connected to the output end of the controllable one-way valve, and the other end connected to the bottom end of the needle-shaped metal tube.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen protection technology, specifically to a portable optical instrument nitrogen filling device. Background Technology

[0002] Optical instruments (such as low-light night vision devices, infrared thermal imagers, and laser rangefinders) are prone to problems such as lens mold, metal oxidation, and optical coating failure in harsh environments like humidity, heat, and salt spray. Nitrogen purging, which involves filling the instrument with high-purity nitrogen and maintaining a slight positive pressure to displace humid air and create a dry, inert environment, has become a core maintenance method for extending the lifespan of precision optical components. Currently, nitrogen purging operations mainly rely on two types of devices:

[0003] Fixed nitrogen filling equipment: It is usually equipped with a large nitrogen storage tank and a complex pipeline system. Although it can achieve pressure control, it is bulky and requires an external power supply, and is only suitable for factory repair scenarios.

[0004] Simple handheld air inflator: It uses a mechanical pressure gauge and a single interface adapter, which has significant drawbacks.

[0005] Poor interface compatibility: Spring clip type connectors only support specific thread specifications and are not compatible with non-standard interfaces (such as when an adapter needs to be replaced);

[0006] Especially in emergency response scenarios, existing devices are inadequate for rapid and accurate nitrogen filling and maintenance of optical instruments due to their poor portability and cumbersome operation. There is an urgent need to develop an integrated, highly compatible, portable nitrogen filling device.

[0007] Therefore, this utility model proposes a portable optical instrument nitrogen filling device. Utility Model Content

[0008] To address the shortcomings of existing technologies, this invention proposes a portable nitrogen filling device for optical instruments, which can improve portability, enhance compatibility, and simplify operation.

[0009] The technical solution of this utility model is implemented as follows:

[0010] A portable optical instrument nitrogen filling device includes a portable case, the inner part of which is provided with a gas source chamber and an equipment chamber, and a handle is provided on the top of the portable case; a gas source unit, installed in the gas source chamber and equipped with multiple high-pressure nitrogen cylinders; an electronic control device, fixed in the equipment chamber, including a gas source pressure monitoring module and an instrument pressure monitoring module connected to the gas source unit; a controllable one-way valve, the input end of which is connected to the output end of the instrument pressure monitoring module through a gas tube; a universal connector, including a metal docking cylinder with a closed bottom hollow cylinder, a needle-shaped metal tube, and a rotating claw mechanism sleeved on the outer wall of the metal docking cylinder, the needle-shaped metal tube passing through the bottom center hole of the metal docking cylinder in a coaxial direction, and the top end of the needle-shaped metal tube extending to the top of the inner cavity of the metal docking cylinder; and a gas tube assembly, one end of which is connected to the output end of the controllable one-way valve, and the other end of which is connected to the bottom end of the needle-shaped metal tube.

[0011] Preferably, the rotating jaw mechanism includes three circumferentially distributed jaws and a threaded sleeve. The jaws are slidably embedded in the radial grooves on the outer wall of the metal docking cylinder. The threaded sleeve is threadedly fitted onto the outer wall of the metal docking cylinder. The inner wall of the threaded sleeve is provided with an inclined guide surface, and the inclined guide surface slides in contact with the wedge-shaped surface at the tail of the jaw.

[0012] Preferably, a return spring is fitted on the claw, with one end of the return spring connected to the radial groove and the other end connected to the claw.

[0013] Preferably, the angle between the wedge-shaped surface of the chuck and the inclined guide surface of the threaded sleeve is 15°-30°.

[0014] Preferably, the needle-shaped metal tube is fixed to the center hole at the bottom of the metal docking cylinder by welding or thread sealing.

[0015] Preferably, the output end of the controllable one-way valve is connected to the air pipe assembly via a threaded joint.

[0016] Preferably, the input end of the gas source pressure monitoring module of the electronic control device is connected to the output end of the gas source unit through a threaded interface.

[0017] Preferably, a quick-connect fitting is provided at the connection between the tracheal assembly and the bottom end of the needle-shaped metal tube.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] In this solution, high-pressure nitrogen from the gas source unit is input to the gas source pressure monitoring module of the electronic control device via a gas tube. The nitrogen flows sequentially through the instrument pressure monitoring module, the controllable one-way valve, and the gas tube assembly, finally being injected into the optical instrument through the needle-shaped metal tube of the universal connector. The source chamber and the equipment chamber are integrated into a portable case, and the handle allows for one-handed carrying, making it suitable for emergency situations. Gas path integrity: The gas tube assembly connects each unit, ensuring a complete transmission path for nitrogen from the gas source unit to the universal connector. The needle-shaped metal tube directly contacts the instrument port, improving airtightness. Pressure monitoring foundation: The gas source / instrument pressure monitoring module provides the structural foundation for nitrogen filling pressure control. Backflow prevention: The physical structure of the controllable one-way valve prevents gas backflow inside the optical instrument. Universal compatibility: The rotating claw mechanism provides mechanical fixing capability for multiple instrument ports. By mechanically adjusting and clamping the external thread of the optical instrument's filling port, it adapts to different thread specifications without the need to replace the connector, thereby improving portability, expanding interface compatibility, and optimizing operational efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a portable optical instrument nitrogen filling device according to the present invention;

[0022] Figure 2 for Figure 1 Internal structure diagram of the universal connector;

[0023] Attached diagram labels: 1-Portable case; 11-Air source compartment; 12-Equipment cavity; 13-Handle; 2-Air source unit; 3-Electrical control device; 31-Air source pressure monitoring module; 32-Instrument pressure monitoring module; 4-Controllable one-way valve; 5-Universal connector; 51-Metal docking cylinder; 511-Radial groove; 52-Needle-shaped metal tube; 53-Rotating claw mechanism; 531-Claw; 532-Threaded sleeve; 533-Inclined guide surface; 534-Wedge-shaped surface; 535-Reset spring; 6-Air tube assembly. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," "third," and "fourth," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] This embodiment proposes a portable nitrogen filling device for optical instruments, such as... Figure 1 and Figure 2As shown, a portable case 1 is provided, which includes an air source compartment 11 and an equipment compartment. A handle 13 is provided on the top of the portable case 1. An air source unit 2 is installed in the air source compartment 11 and is equipped with multiple high-pressure nitrogen cylinders. An electronic control device 3 is fixed in the equipment compartment and includes an air source pressure monitoring module 31 and an instrument pressure monitoring module 32 connected to the air source unit. A controllable one-way valve 4 has its input end connected to the output end of the instrument pressure monitoring module 32 via an air pipe. A universal connector 5 includes a metal docking cylinder 51 with a closed bottom, a needle-shaped metal tube 52, and a rotating claw mechanism 53 sleeved on the outer wall of the metal docking cylinder 51. The needle-shaped metal tube passes through the bottom center hole of the metal docking cylinder 51 in a coaxial direction. The tip of the needle-shaped metal tube extends to the top of the inner cavity of the metal docking cylinder 51; the air tube assembly 6, one end of which is connected to the output end of the controllable one-way valve 4, and the other end is connected to the bottom end of the needle-shaped metal tube 52, has the following advantages: portability: the gas source chamber and the equipment chamber are integrated into the portable case, and the handle allows for one-handed carrying; gas path integrity: the air tube assembly connects each unit, ensuring a complete transmission path of nitrogen from the gas source unit to the universal connector; pressure monitoring foundation: the gas source / instrument pressure monitoring module provides a structural foundation for nitrogen filling pressure control; backflow prevention: the physical structure of the controllable one-way valve prevents gas backflow inside the optical instrument; universal adaptability: the rotating claw mechanism provides mechanical fixing capability for multiple instrument ports.

[0028] Working principle: High-pressure nitrogen from gas source unit 2 is input into gas source pressure monitoring module 31 of electronic control device 3 via gas pipe; nitrogen flows sequentially through instrument pressure monitoring module 32, controllable one-way valve 4, and gas pipe assembly, and is finally injected into optical instrument through needle-shaped metal tube 52 of universal connector 5; the source chamber and equipment chamber are integrated into portable case 1, and the handle 13 allows for one-handed carrying, suitable for emergency situations; gas path integrity: the gas pipe assembly connects each unit, ensuring a complete transmission path of nitrogen from gas source unit 2 to universal connector 5, and the needle-shaped metal tube 52 directly contacts the instrument port, improving airtightness; pressure monitoring basis: gas source / instrument pressure monitoring module 32 provides a structural basis for nitrogen filling pressure control; backflow prevention: the physical structure of controllable one-way valve 4 prevents gas backflow inside optical instrument; universal compatibility: the rotating claw mechanism 53 provides mechanical fixing capability for multiple instrument ports, and by mechanically adjusting and clamping the external thread of the optical instrument filling port, it adapts to different thread specifications without the need to replace the connector, thereby improving portability, expanding interface compatibility, and optimizing operating efficiency.

[0029] In this embodiment, the module series structure enables full monitoring of the pressure from the gas source output to the internal pressure of the instrument; pressure data comparison can quickly identify the location of gas path blockage or leakage.

[0030] In this embodiment, as Figure 2As shown, the rotating jaw mechanism 53 includes three circumferentially distributed jaws 531 and a threaded sleeve 532. The jaws 531 are slidably embedded in the radial grooves 511 on the outer wall of the metal docking cylinder 51. The threaded sleeve 532 is threadedly fitted onto the outer wall of the metal docking cylinder 51. The inner wall of the threaded sleeve 532 is provided with an inclined guide surface 533. The inclined guide surface 533 slides in contact with the wedge-shaped surface 534 at the tail of the jaw 531.

[0031] In this embodiment, a return spring 535 is sleeved on the claw 531. One end of the return spring 535 is connected to the radial groove 511, and the other end is connected to the claw 531.

[0032] In this embodiment, the angle between the wedge-shaped surface 534 of the chuck 531 and the inclined guide surface 533 of the threaded sleeve 532 is 15°-30°. The rotation of the threaded sleeve drives the chuck to move radially, and the contact of the wedge-shaped surface generates mechanical self-locking. The working surface of the chuck is covered with a polytetrafluoroethylene wear-resistant layer. The hardness of the wear-resistant layer is lower than that of the instrument port metal, protecting the precision threads. The friction coefficient is increased to prevent loosening caused by air inflation vibration.

[0033] In this embodiment, the needle-shaped metal tube 52 is fixed to the bottom center hole of the metal docking cylinder 51 by welding or thread sealing. The top of the needle-shaped metal tube is provided with an annular conical sealing part, which provides zero leakage sealing: the conical surface makes hard metal contact with the instrument port; it is anti-aging, and the metal seal avoids failure problems caused by the aging of rubber materials.

[0034] In this embodiment, the output end of the controllable one-way valve 4 is connected to the air pipe assembly 6 via a threaded joint.

[0035] In this embodiment, the input end of the gas source pressure monitoring module 31 of the electronic control device 3 is connected to the output end of the gas source unit 2 through a threaded interface.

[0036] In this embodiment, a quick-connect connector is provided at the connection between the tracheal assembly 6 and the bottom end of the needle-shaped metal tube 52. The quick-connect connector includes: a plug, fixed to the outer wall of the bottom end of the needle-shaped metal tube; and a socket, fixed to the end of the flexible tube of the tracheal assembly, with an elastic sealing ring inside.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A portable optical instrument nitrogen filling device, characterized in that: include Portable case (1), the portable case (1) is provided with an air source compartment (11) and an equipment compartment inside, and a handle (13) is provided on the top of the portable case (1); Gas source unit (2) is installed in gas source compartment (11) and is equipped with multiple high-pressure nitrogen cylinders; The electrical control device (3) is fixed in the equipment compartment and includes a gas source pressure monitoring module (31) and an instrument pressure monitoring module (32) connected to the gas source unit. A controllable one-way valve (4) has its input end connected to the output end of the instrument pressure monitoring module (32) via an air tube; The universal connector (5) includes a metal docking cylinder (51) with a closed bottom and a hollow cylindrical body, a needle-shaped metal tube (52) and a rotating claw mechanism (53) sleeved on the outer wall of the metal docking cylinder (51). The needle-shaped metal tube passes through the bottom center hole of the metal docking cylinder (51) in a coaxial direction, and the top end of the needle-shaped metal tube extends to the top of the inner cavity of the metal docking cylinder (51). The tracheal assembly (6) has one end connected to the output end of the controllable one-way valve (4) and the other end connected to the bottom end of the needle-shaped metal tube (52).

2. The portable optical instrument nitrogen filling device according to claim 1, characterized in that: The rotating jaw mechanism (53) includes three circumferentially distributed jaws (531) and a threaded sleeve (532). The jaws (531) are slidably embedded in the radial groove (511) on the outer wall of the metal docking cylinder (51). The threaded sleeve (532) is threadedly fitted onto the outer wall of the metal docking cylinder (51). The inner wall of the threaded sleeve (532) is provided with an inclined guide surface (533), which slides in contact with the wedge-shaped surface (534) at the tail of the claw (531).

3. The portable optical instrument nitrogen filling device according to claim 2, characterized in that: A return spring (535) is fitted on the claw (531). One end of the return spring (535) is connected to the radial groove (511), and the other end is connected to the claw (531).

4. The portable optical instrument nitrogen filling device according to claim 2, characterized in that: The angle between the wedge-shaped surface (534) of the chuck (531) and the inclined guide surface (533) of the threaded sleeve (532) is 15°-30°.

5. A portable optical instrument nitrogen filling device according to claim 1, characterized in that: The needle-shaped metal tube (52) is fixed to the bottom center hole of the metal docking cylinder (51) by welding or thread sealing.

6. The portable optical instrument nitrogen filling device according to claim 1, characterized in that: The output end of the controllable one-way valve (4) is connected to the air pipe assembly (6) via a threaded joint.

7. A portable optical instrument nitrogen filling device according to claim 1, characterized in that: The input end of the gas source pressure monitoring module (31) of the electronic control device (3) is connected to the output end of the gas source unit (2) through a threaded interface.

8. A portable optical instrument nitrogen filling device according to claim 1, characterized in that: A quick-connect fitting is provided at the connection between the tracheal assembly (6) and the bottom end of the needle-shaped metal tube (52).

Images