A helium impurity removal device built in the airship gasbag and a using method thereof

Abstract

A helium impurity removal device for airship gas bag, comprising a device main body and a reaction medium, the reaction medium is detachably installed in the device main body, the device main body comprises an aluminum alloy shell cylinder, two aluminum alloy end covers, a mica cylinder, an induction coil and a fixing assembly, one end cover is detachably connected to each end of the shell cylinder, the inner cavity of the shell cylinder is provided with the mica cylinder, the induction coil is wrapped around the outer wall of the mica cylinder, and the fixing assembly is arranged in the inner cavity of the mica cylinder; the reaction medium is an impurity removal metal, the impurity removal metal is in a cylindrical shape, the impurity removal metal is coaxially installed in the inner cavity of the mica cylinder through the fixing assembly, and the impurity removal metal chemically reacts with impurity gas in the airship gas bag under the electromagnetic induction heating action of the induction coil; the device has the advantages that light materials are adopted, the structure is compact, the volume is small, the device can be embeddedly installed in the airship gas bag, the helium in the airship gas bag can be purified in line, normal temperature and high temperature grading impurity removal are adopted, and the device has stronger applicability.

Description

Technical Field

[0001] This invention belongs to the field of airship transportation technology, specifically an airship gasbag built-in helium impurity removal device and its usage method. Background Technology

[0002] Airships rely on helium gas filled inside their gasbags for lift, and the purity of the helium directly affects the airship's buoyancy and operational safety. During long-term service, external impurities—air—can slowly seep into the gasbags through gasbag seals and pipe connections. Additionally, routine inflation and deflation, as well as equipment maintenance, can introduce small amounts of impurities, causing a continuous decline in the purity of the helium inside the gasbags.

[0003] When helium purity falls below the industry standard threshold, the traditional approach is to purge the mixed gas inside the airship's gasbag and refill it with high-purity helium. This method not only incurs high helium procurement and refilling costs but also results in a significant waste of unused helium. Furthermore, current helium purification equipment cannot be directly installed inside the airship's gasbag. Therefore, developing a compact, small-sized device that can be directly installed inside the airship's gasbag for online autonomous purification of the helium is urgently needed to address the issue of helium purity degradation in airships, reduce operating costs, and eliminate the need for frequent downtime for helium refilling. Summary of the Invention

[0004] The purpose of this invention is to design an airship gasbag-integrated helium impurity removal device and its usage method, which purifies the helium inside the gasbag online, reducing operating costs and resource waste. This purpose is achieved through the following technical solution: An airship gasbag-integrated helium impurity removal device includes a device body and a reaction medium. The reaction medium is detachably installed inside the device body. The device body includes an aluminum alloy outer shell, two aluminum alloy end caps, a mica tube, an induction coil, and a fixing component. Both ends of the outer shell can be detachably connected to an end cap. The inner cavity of the outer shell is provided with a mica tube. The induction coil is wrapped around the outer wall of the mica tube. The fixing component is located in the inner cavity of the mica tube. The reaction medium is a purification metal, which is coaxially installed in the inner cavity of the mica tube through the fixing component. The purification metal reacts chemically with impurity gases inside the airship gasbag under the electromagnetic induction heating effect of the induction coil.

[0005] The technical solution of this invention features a device made of lightweight materials, with a compact structure and small size. It can be embedded in a reserved installation position inside the airship's gasbag to purify helium gas online, reducing airship downtime, lowering operating costs, and improving work efficiency. This device can remove some impurity gases at room temperature, achieving helium purification. Heating the purification metal via electromagnetic induction can further remove some impurity gases and accelerate the purification reaction rate, significantly improving purification efficiency. The device has a simple principle, a safe and reliable structure, and performs staged purification at both room temperature and high temperature, making it more versatile. The device is detachable, and the purification metal used as the reaction medium can be replaced periodically, greatly reducing production and operating costs while ensuring long-term stable purification.

[0006] In a preferred embodiment of the present invention, the outer shell includes an upper cylinder and a lower cylinder, which are detachably connected. The inner wall of the upper cylinder is provided with a first limiting platform for engaging the upper end face of the mica cylinder, and the inner wall of the lower cylinder is provided with a second limiting platform for engaging the lower end face of the mica cylinder. The upper and lower cylinders are detachable, which facilitates the installation of the mica cylinder and will not affect or interfere with the induction coil on the outer wall of the mica cylinder. The first and second limiting platforms clamp the mica cylinder from both ends to fix the mica cylinder.

[0007] In a preferred embodiment of the present invention, the outer wall of the lower cylinder is provided with wiring holes for the terminals of the induction coil to pass through. The outer wall of the lower cylinder is also provided with multiple heat dissipation holes. The wiring holes facilitate the terminals of the induction coil to pass through and connect to the power supply system of the airship via wires. The heat dissipation holes facilitate the dissipation of heat generated by the induction coil itself.

[0008] In a preferred embodiment of the present invention, the cross-sections of the first limiting platform and the second limiting platform are both "L" shaped. The surfaces of the first limiting platform and the second limiting platform that are in contact with the mica tube are provided with ultra-thin mica buffer pads. The "L" shaped first limiting platform and the second limiting platform can not only clamp the mica tube from both ends to prevent the mica tube from shifting axially, but also limit the distance between the mica tube and the outer shell tube, ensuring that there is space between the mica tube and the outer shell tube. The mica buffer pads can play a buffering role to prevent damage to the mica tube when the upper and lower tubes are connected and fixed.

[0009] In a preferred embodiment of the present invention, there is a gap between the middle section of the mica tube and the outer shell tube. The distance of the gap is greater than the diameter of the induction coil. The gap between the mica tube and the outer shell tube is determined by the vertical thickness of the "L"-shaped first limiting platform and the second limiting platform. The gap provides a space for the induction coil and avoids the outer shell tube from directly contacting the induction coil.

[0010] In a preferred embodiment of the present invention, the impurity removal metal is made of magnesium. The impurity removal metal can be a solid cylindrical metal rod or a hollow cylindrical metal tube. Magnesium can react with oxygen, and at the same time, magnesium can react with nitrogen after the temperature rises. This can remove most of the gases in the air, thereby achieving the purpose of helium purification. Furthermore, as helium is an inert gas, the increase in magnesium temperature does not easily cause safety hazards.

[0011] In a preferred embodiment of the present invention, the fixing component is made of alumina ceramic material and includes a fixed bracket, a movable bracket, and a positioning ring. The fixed bracket is located inside the lower end cap and is in contact with the bottom of the impurity-removing metal. The movable bracket is located inside the upper end cap and is in contact with the top of the impurity-removing metal. The positioning ring is sleeved on the outer wall of the impurity-removing metal and is in contact with the inner wall of the mica cylinder. The fixed bracket and the movable bracket limit the impurity-removing metal by clamping it from both ends to prevent the impurity-removing metal from displacing along the axial direction. At the same time, the positioning ring limits it radially to ensure that the impurity-removing metal is coaxial with the mica cylinder. During electromagnetic induction heating, the temperature of each part rises uniformly.

[0012] In a preferred embodiment of the present invention, when the impurity removal metal is a solid cylindrical metal rod, multiple impurity removal metal rods are provided, and the multiple metal rods are attached to each other to form an assembly. The outer wall of the assembly is tightly attached to the inner wall of the positioning ring. The metal rods are attached to each other, naturally forming gaps, which facilitates the entry of impurity gas and full contact with the impurity removal metal.

[0013] In a preferred embodiment of the present invention, when the impurity-removing metal is a hollow cylindrical metal tube, the impurity-removing metal can be a single tube or multiple tubes. The outer wall of a single metal tube is tightly fitted with the inner wall of the positioning ring. Multiple metal tubes are fitted together to form an assembly, and the outer wall of the assembly is tightly fitted with the inner wall of the positioning ring. A single magnesium tube contacts the impurity gas through its tube wall, and multiple magnesium rods contact the impurity gas through the gaps between them and their own hollow inner walls.

[0014] A preferred embodiment of the technical solution of the present invention, a method for using a helium impurity removal device built into an airship gasbag, characterized by comprising the following steps: Step 1: Device assembly and pre-installation. Remove the top end cap, install the impurity removal metal into the inner cavity of the mica tube using the fixing components, and reinstall the top end cap. Once the device is assembled, pre-install the assembled impurity removal device into the airship gasbag that has not yet been filled with helium, and connect the wiring terminals of the induction coil to the airship's own power supply system. Step 2: Inflate the airship's gasbag with standard purity helium through the gasbag inflation port and check the gasbag's airtightness. Simultaneously complete all routine checks and takeoff preparations before the airship's takeoff. Step 3: After the airship is put into use, a small amount of impurity gas - air - seeps into the gasbag. The oxygen in it will directly react with the impurity removal metal at room temperature, reducing the oxygen content in the gasbag and keeping the purity of helium in the gasbag stable above the industry standard threshold. Step 4: Turn on the power. The induction coil is energized to generate a magnetic field, which raises the temperature of the impurity-removing metal through electromagnetic induction. The reaction rate between the impurity-removing metal and oxygen is accelerated, the oxygen content in the airbag decreases rapidly, and the purity of helium in the airbag is stabilized above the industry standard threshold. Step 5: As the temperature of the impurity-removing metal continues to rise, it reaches the reaction temperature with nitrogen. The impurity-removing metal reacts chemically with nitrogen, reducing the nitrogen content in the airbag. Simultaneously, the reaction rate between the impurity-removing metal and oxygen further accelerates, and the helium purity in the airbag remains above the industry standard threshold. Step Six: Regular maintenance. Through the airship's inflation port, replenish the airship with an appropriate amount of standard purity helium to compensate for the gas volume consumed by the chemical reaction between the impurity metals and the impurity gases. Step 7: Change the reaction medium. When the impurity-removing metal no longer reacts chemically with the impurity gas, release the helium gas from the airship gasbag, remove the upper end cap, take out the fixing component and the original impurity-removing metal, take out the new impurity-removing metal and put it into the inner cavity of the mica tube through the fixing component, reinstall the upper end cap, and repeat steps 2 to 6.

[0015] The beneficial effects of this invention compared to the prior art are: This device uses lightweight materials, has a compact structure and small size, and can be embedded in the reserved installation position inside the airship's gasbag to remove impurities and purify the helium gas inside the gasbag online, reducing the frequency of airship downtime, lowering operating costs, and improving work efficiency.

[0016] This device can remove some impurity gases at room temperature, achieving the purpose of helium purification. After heating the metal to be purified by electromagnetic induction, some more impurity gases can be removed, and the purification reaction rate can be accelerated, greatly improving the purification efficiency. The device has a simple principle, a safe and reliable structure, and can perform staged purification at room temperature and high temperature, making it more versatile.

[0017] The device is detachable, and the impurity removal metal used as the reaction medium can be replaced periodically, greatly reducing production and usage costs, while ensuring long-term stable impurity removal. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is a cross-sectional view of the outer casing of the present invention; Figure 3 This is a cross-sectional view of the present invention after the end caps have been removed; Figure 4 This is a schematic diagram of the fixing component and the impurity removal metal in this invention; Figure 5 This is a planar schematic diagram of the impurity removal metal arrangement in this invention. Figure 1 ; Figure 6 This is a planar schematic diagram of the impurity removal metal arrangement in this invention. Figure 2 ; Wherein: 1-outer shell, 11-wiring perforation, 12-heat dissipation hole, 13-upper cylinder, 14-first limiting platform, 15-lower cylinder, 16-second limiting platform, 2-end cap, 3-mica cylinder, 4-induction coil, 5-impurity metal, 6-fixed component, 61-fixed bracket, 62-movable bracket, 63-positioning ring. Detailed Implementation

[0019] The following will refer to the appendices in the embodiments of the present invention. Figure 1-6 The technical solutions in the embodiments of the present invention will be described in detail below.

[0020] Example 1

[0021] like Figure 1-6 As shown, the present invention relates to a helium impurity removal device and its usage method for an airship gasbag. The impurity removal device is installed in a pre-reserved installation position inside the airship gasbag. The specific installation method can be to use high-temperature resistant flexible straps for binding, which is a conventional installation method. Of course, binding and fixing is only one method. This embodiment is just an example, and the specific installation method is not limited. If bracket anchor points or other auxiliary installation is required, bracket anchor points can be welded to the surface of the outer shell cylinder 1 to assist in installation and fixing.

[0022] A helium impurity removal device built into the airship gasbag includes a main body and a reaction medium. The reaction medium is detachably installed inside the main body. By reacting chemically with the impurity gas—gas in the air—the reaction medium removes most of the gas in the air, thereby achieving the purpose of helium impurity removal and purification.

[0023] like Figure 1 As shown, the main body of the device includes an outer shell cylinder 1, an end cap 2, a mica cylinder 3, an induction coil 4, and a fixing component 6. The main body of the device does not require temporary on-site installation. The reaction medium requires special storage and is installed on-site during use. The reaction medium is a purified metal 5, and the material of the purified metal 5 is magnesium.

[0024] The working principle of this device is as follows: At room temperature, the impurity-removing metal 5 reacts directly with oxygen. When the induction coil 4 is energized, it generates electromagnetic induction, which heats the impurity-removing metal 5. As the temperature of the impurity-removing metal 5 increases, the reaction rate between the impurity-removing metal 5 and oxygen accelerates. Furthermore, as the temperature rises, the impurity-removing metal 5 reaches the temperature at which it reacts with helium, and then reacts with nitrogen. Since oxygen and nitrogen make up a large proportion of the air, by consuming oxygen and nitrogen, most of the impurity gases can be removed, thereby achieving the purpose of helium purification and maintaining the purity of helium in the airship's gasbag.

[0025] like Figure 1 and Figure 2 As shown, the outer shell 1 is a hollow cylindrical structure with both ends of the outer shell 1 being open. The outer shell 1 is made of aluminum alloy, which is lightweight and will not significantly increase the weight of the airship, making it suitable for the airship field.

[0026] In this embodiment, flanges are provided on both ends of the outer shell cylinder 1. The flanges are integrally formed or fixed by welding. The flanges facilitate the fixing of the outer shell cylinder 1 and the end cover 2 with screws, thereby realizing a detachable connection between the outer shell cylinder 1 and the end cover 2.

[0027] End cap 2 is also made of aluminum alloy, and the upper end cap 2 needs to have an air intake grille so that the gas can enter the impurity removal device. The air intake grille can be formed by opening holes on the surface of end cap 2.

[0028] Furthermore, the outer casing 1 includes an upper casing 13 and a lower casing 15. The end faces of the upper casing 13 and the lower casing 15 that fit together are also provided with flanges. The upper casing 13 and the lower casing 15 are fixed together by screws. The upper casing 13 and the lower casing 15 are detachable, which facilitates the installation of the mica tube 3 into the interior of the outer casing 1 and will not interfere with or affect the induction coil 4 wound on the mica tube 3, thus affecting the normal operation of the impurity removal device.

[0029] The inner wall of the upper cylinder 13 is fixed with the first limiting platform 14 by integral molding or welding, and the inner wall of the lower cylinder 15 is fixed with the second limiting platform 16 by integral molding or welding. The first limiting platform 14 and the second limiting platform 16 are distributed in a ring on the inner wall of the outer shell cylinder 1. The cross-sections of the first limiting platform 14 and the second limiting platform 16 are both L-shaped steps.

[0030] The lowest plane of the first limiting platform 14 and the second limiting platform 16 is stepped and used to fit the two end faces of the mica tube 3 to achieve axial fixation of the mica tube 3. The surfaces of the first limiting platform 14 and the second limiting platform 16 that fit with the mica tube 3 are provided with ultra-thin mica buffer pads by adhesive bonding. The mica buffer pads play a buffering role to prevent damage to the mica tube 3 when fixing the upper tube 13 and the lower tube 15.

[0031] The mica tube 3 is clamped and limited by the first limiting platform 14 and the second limiting platform 16 at both ends to prevent displacement in the axial direction. The first limiting platform 14 and the second limiting platform 16 are arranged in a ring, so the mica tube 3 is coaxial with the outer shell tube 1. At the same time, since the first limiting platform 14 and the second limiting platform 16 are located at both ends of the mica tube 3, there is a gap between the middle section of the mica tube 3 and the outer shell tube 1, which provides a space for the induction coil 4.

[0032] The mica tube 3 and the induction coil 4 are a pre-assembled unit. When installing them into the outer casing 1, the method is as follows: Insert the mica tube 3 into the lower tube 15 from top to bottom, adjust the angle so that the terminals of the induction coil 4 correspond to the wiring holes 11, and then continue downward until the lower end of the mica tube 3 is in contact with the second limiting platform 16. At this time, the two terminals of the induction coil 4 are exposed from the wiring holes 11. Then, put the upper tube 13 on the upper part of the mica tube 3 from top to bottom, adjust the angle so that the upper end of the mica tube 3 engages with the first limiting platform 14, and then fix the upper tube 13 and the lower tube 15 with screws to complete the connection between the mica tube 3 and the outer casing 1.

[0033] The width of the highest surface of the first limiting platform 14 and the second limiting platform 16, i.e. the vertical thickness of the "L"-shaped step, determines the gap between the mica tube 3 and the outer shell tube 1. This gap needs to be greater than the diameter of the induction coil 4. The induction coil 4 is wound around the middle section of the outer wall of the mica tube 3. Therefore, after the mica tube 3 is installed, it can avoid direct contact with the outer shell tube 1.

[0034] The first limiting platform 14 and the second limiting platform 16 only fit against the edge of the end face of the mica tube 3 and do not extend into the projection area of ​​the inner cavity of the mica tube 3. Therefore, when the impurity-removing metal 5 is installed later, the impurity-removing metal 5 can be smoothly put into the inner cavity of the mica tube 3 without causing any impact.

[0035] Furthermore, the upper cylinder 13 and the lower cylinder 15 are of different lengths, with the lower cylinder 15 being longer and fully covering the area where the induction coil 4 is located. Wiring holes 11 are opened on the outer wall of the lower cylinder 15, and the wiring holes 11 correspond to the terminals at both ends of the induction coil 4. The two ends of the induction coil 4 can pass through the wiring holes 11, naturally forming terminals, and are connected to the airship's own power supply system through wires.

[0036] The induction coil 4 can be bonded to the outer wall of the mica tube 3 with a high-temperature resistant inorganic insulating adhesive, which is existing technology. Other methods are also possible and are not limited here.

[0037] Furthermore, the airship's own power supply system needs to be converted into high-voltage, high-frequency alternating current through voltage boosting and inversion, which is existing technology and facilitates the normal operation of electromagnetic induction.

[0038] Multiple heat dissipation holes 12 are evenly opened on the outer wall of the lower cylinder 15. The heat dissipation holes 12 correspond to the location of the induction coil 4, which facilitates the heat generated by the induction coil 4 to be discharged to the outside through heat transfer, thus avoiding local heat accumulation.

[0039] like Figure 3 and Figure 4 As shown, the impurity removal metal 5 used as the reaction medium is magnesium. Magnesium can react with oxygen at room temperature. When the temperature rises, magnesium will react with nitrogen and will also accelerate the reaction with oxygen. Furthermore, since it is in a helium environment, which is an inert gas, magnesium will not pose a safety hazard even when heated.

[0040] Furthermore, the temperature rise of the impurity-removing metal 5 needs to be set with an upper limit. That is, there is an upper limit to the temperature of electromagnetic induction heating after the induction coil 4 is energized. This can prevent accidents caused by continuous temperature rise. After the temperature of the impurity-removing metal 5 reaches the upper limit, the reaction rate with oxygen and nitrogen reaches its fastest. The specific method to achieve the above purpose is open-loop control. By programming the airship's own power supply system, after the power supply system is energized, it will electromagnetically induction heat the impurity-removing metal 5 at a specific power level within a predetermined time. Open-loop control is a prior art technology.

[0041] The impurity-removing metal 5 is cylindrical in shape and is coaxially arranged with the mica tube 3. Therefore, when the induction coil 4 heats the impurity-removing metal 5 through electromagnetic induction, the temperature of the impurity-removing metal 5 rises uniformly. The impurity-removing metal 5 is clamped and limited by the fixing component 6 and installed in the inner cavity of the mica tube 3.

[0042] The fixing component 6 is made of alumina ceramic, which is resistant to high temperature and does not conduct heat easily. At the same time, alumina ceramic has high strength and slight elasticity, which can not only help to fix the position, but also compensate for the thermal expansion generated by the impurity removal metal 5, thus preventing damage to the mica cylinder 3.

[0043] The fixing component 6 separates the impurity-removing metal 5, the mica tube 3, and the end caps 2 at both ends to prevent accidents caused by heat conduction. The fixing component 6 includes a fixing bracket 61, a movable bracket 62, and a positioning ring 63. The fixing component 6 is located inside the mica tube 3. When assembling the device, the fixing component 6 needs to be removed.

[0044] like Figure 2-4 As shown, the bottom of the fixing bracket 61 is located between the lower end cap 2 and the second protrusion 16. After the lower end cap 2 is fixed, the bottom of the fixing bracket 61 is clamped between the end cap 2 and the second protrusion 16, and the fixing bracket 61 will not shake. The top of the fixing bracket 61 extends into the mica tube 3 and fits against the inner wall of the mica tube 3. When the impurity-removing metal 5 is put in, the lower end face of the impurity-removing metal 5 fits against the top of the fixing bracket 61.

[0045] The movable bracket 62 is placed above the impurity-removing metal 5 and fits against the upper end surface of the impurity-removing metal 5. Then, it is fixed and limited by the upper end cap 2. The movable bracket 62 will not move in the axial direction. By fixing the bracket 6 and the movable bracket 62, the impurity-removing metal 5 is clamped and fixed, and the impurity-removing metal 5 is prevented from moving in the axial direction.

[0046] Furthermore, the top and bottom of the fixed bracket 61 are solid, which can fully contact and fit with the lower end cap 2 and the impurity removal metal 5 to achieve clamping and fixation. The bottom solid of the movable bracket 62 needs to have arrayed openings to facilitate gas to enter the interior and fully contact with the impurity removal metal 5, thereby improving reaction efficiency. At the same time, the top of the movable bracket 62 is a circular plate, which fits with the edge of the upper end cap 2 and will not block the air intake grille on the surface of the end cap 2, thus not affecting the normal entry of gas.

[0047] The positioning ring 63 is circular and can be fitted onto the outer wall of the impurity-removing metal 5. The outer wall of the positioning ring 63 is in contact with the inner wall of the mica cylinder 3. The positioning ring 63 can achieve radial positioning of the impurity-removing metal 5 and also ensure that the impurity-removing metal 5 and the mica cylinder 3 are coaxially arranged.

[0048] like Figure 5 and Figure 6 As shown, the impurity removal metal 5 can adopt two structural forms, specifically a solid cylindrical metal rod or a hollow cylindrical metal tube. Multiple solid cylindrical metal rods or hollow cylindrical metal tubes are attached to each other to form an approximately cylindrical assembly. The assembly is constrained by the positioning ring 63. The outer ring of the assembly is attached to the positioning ring 63, and due to the friction inside the assembly, the individual components are tightly attached to each other and will not fall off.

[0049] When the impurity removal metal 5 is a solid cylindrical metal rod, the metal rods fit together and naturally form gaps between them, thereby achieving contact and reaction with the impurity gas.

[0050] When the impurity removal metal 4 is a hollow cylindrical metal tube, its hollow structure not only creates gaps between the metal tubes but also creates cavities inside the metal tube itself, greatly increasing the contact area with the gas and thus improving the reaction efficiency.

[0051] Of course, for ease of installation, a single metal tube can also be used, with the outer wall of the single metal tube fitting against the inner wall of the positioning ring 63. That is, the outer diameter of the single metal tube is the same as the inner diameter of the positioning ring 63. In the case of a single metal tube, the relevant reaction is achieved only through its own tube wall contacting the gas.

[0052] Furthermore, when the impurity removal metal 5 uses only a single metal rod, the bottom of the movable support 62 can be machined into a ring shape, which only fits the edge of the metal rod, reducing obstruction, improving air intake efficiency, and enhancing reaction efficiency.

[0053] To install the impurity-removing metal 5, simply open the upper end cap 2, remove the movable bracket 62 and the positioning ring 63, and place the metal rod or metal tube into the positioning ring 63 one by one until the metal rod or metal tube is pressed against each other and will not fall off. Then, place it together with the positioning ring 63 into the inside of the mica cylinder 3. Through the action of the positioning ring 63, the impurity-removing metal 5 is coaxially suspended in the inner cavity of the mica cylinder 3. Then, put the movable bracket 62 back in its original position and fix the upper end cap 2. The installation of the impurity-removing metal 5 is now complete. Furthermore, for the case of a single metal tube, it is possible to process the impurity removal metal 5 as a whole into a cylindrical shape with a honeycomb-shaped hollow center, which can greatly increase the contact area with the impurity gas. At the same time, as a separate unit, it is also easy to install and replace.

[0054] The method of using a helium impurity removal device built into the airship gasbag is as follows: Step one is as follows: unscrew the fixing screws of the upper end cover 2 to separate the upper end cover 2 from the outer shell cylinder 1, then take out the movable bracket 62 and the positioning ring 63, take out the impurity removal metal 5, put the impurity removal metal 5 into the inner side of the positioning ring 63 until the impurity removal metal 5 is tightly attached to the inner wall of the positioning ring 63, then insert the impurity removal metal 5 and the positioning ring 63 into the inner cavity of the mica cylinder 3 as a whole. Under the action of the positioning ring 63, the impurity removal metal 5 is centered and the bottom of the impurity removal metal 5 is attached to the fixed bracket 61. Then put the movable bracket 62 back in its original position and attach the movable bracket 62 to the top of the impurity removal metal 5. Re-fix the upper end cover 2 with screws. The impurity removal device is now assembled.

[0055] Install and fix the impurity removal device in the preset mounting position inside the airbag, pull out both ends of the induction coil 4 from the wiring through hole 11 of the outer shell cylinder 1, connect it to the power supply system through the wire, and wrap the connection with insulating tape for insulation treatment.

[0056] Step two specifically involves: filling the airbag with helium of standard purity through the inflation port until the appropriate total gas volume is reached; checking the airtightness of the device by allowing it to stand still; and simultaneously completing other preparatory work. Specific work items are governed by industry standards and will not be listed here. These standards must be strictly followed.

[0057] Step 3 is as follows: During use or maintenance of the airship, trace amounts of impurity gas—air—may seep into the gasbag for various reasons, causing a decrease in the purity of the helium gas inside the gasbag. As the gas inside the gasbag is constantly moving, the impurity gas will enter the interior of the impurity removal device through the air intake grille of the upper end cover 2, and come into full contact with the impurity removal metal 5. At room temperature, the impurity removal metal 5 will directly react chemically with oxygen, consuming oxygen through the chemical reaction. As a result, the oxygen content decreases, the amount of impurity gas decreases, and thus the helium purity is maintained above the industry standard threshold.

[0058] Step four is as follows: Start the power supply system, energize the induction coil 4, and control the power supply system through programming. Heat the impurity removal metal 5 with a fixed power within a preset time to raise the temperature of the impurity removal metal 5. The reaction rate of the impurity removal metal 5 with oxygen will be accelerated, the oxygen content in the airbag will be reduced rapidly, and the impurity gas content will be reduced.

[0059] Step five is as follows: As heating continues, the temperature of the impurity-removing metal 5 continues to rise until it reaches the temperature at which it reacts with nitrogen. At this point, the impurity-removing metal 5 begins to react chemically with nitrogen, and the nitrogen content in the gasbag decreases. At the same time, as the temperature continues to rise, the reaction rate of the impurity-removing metal 5 with oxygen and nitrogen further accelerates, and the content of impurity gases decreases rapidly.

[0060] When the heating time reaches the preset time, the temperature of the impurity removal metal 5 rises to the limit, and the reaction rate between the impurity removal metal 5 and the impurity gas reaches the fastest. Since the impurity gas is air, with a large proportion of oxygen and nitrogen, most of the impurity gas can be removed through chemical reaction, so that the helium concentration in the airbag is always maintained above the industry standard threshold.

[0061] Step six specifically involves: regularly maintaining the airbag by filling it with standard-purity helium through the inflation port to compensate for the amount of gas consumed after the chemical reaction between the impurity metal 5 and the impurity gas. The airship's own equipment or sensors are used to determine whether the inflation level is up to standard, thus avoiding over-inflation or under-inflation.

[0062] Step seven is as follows: If the purity of helium gas in the gasbag continues to decrease, it indicates that the impurity removal metal 5 no longer reacts with the impurity gas, that is, the impurity removal metal 5 has failed and needs to be replaced.

[0063] At this point, the helium in the airship's gasbag needs to be emptied, the gasbag opened, and the impurity removal device exposed. After normal cooling, once the temperature of the impurity removal metal 5 has dropped to ambient temperature, the upper end cap 2 is removed by loosening the screws, the movable bracket 62 is removed, and then the impurity removal metal 5 and the positioning ring 63 are taken out, and the positioning ring 63 is peeled off from the impurity removal metal 5.

[0064] Take a brand new cleaned metal 5 and place it inside the positioning ring 63 until the cleaned metal 5 is pressed against each other and adheres to the inner wall of the positioning ring 63. Then insert the whole assembly into the mica cylinder 3. Next, put the movable bracket 62 back in its original position above the cleaned metal 5 and press lightly to install the cleaned metal 5 in place. At this time, the two ends of the cleaned metal 5 are respectively attached to the fixed bracket 61 and the movable bracket 62. Put the upper end cap 2 back in its original position and fix it to the outer shell cylinder 1 with screws. The operation is complete. Repeat steps two to six to perform related work and operations periodically.

[0065] Example 2

[0066] Based on Example 1, this embodiment changes the open-loop control to closed-loop control, which can more accurately control the temperature of electromagnetic induction heating. This method monitors the temperature of the impurity-removed metal 5 in real time through a temperature sensor. The temperature sensor can be wrapped with ceramic fiber tape and connected to the fixed bracket 61. Open-loop control is also a prior art.

[0067] The temperature data of the impurity-removing metal 5 is fed back to the airship's onboard power supply system controller. The controller then adjusts the power output in real time to eliminate temperature differences, thereby achieving temperature range control. Through closed-loop control, the temperature of the impurity-removing metal 5 can be kept within a preset range to react with the impurity gas.

[0068] Through the above method, the heating temperature of the impurity removal metal 5 can be precisely controlled. When different types of impurity removal metal 5 are used, the impurity removal metal 5 can react with the impurity gas at a suitable temperature, which not only avoids wasting power resources, but also avoids safety hazards.

[0069] Furthermore, by controlling the temperature, the rate of the impurity removal reaction can be adjusted. For example, the temperature can be appropriately increased to make the reaction between the impurity removal metal 5 and oxygen more intense, thereby increasing the reaction rate.

[0070] Furthermore, temperature control can be applied to more complex scenarios to remove specific gases. For example, if a gas contains multiple other impurity gases, the temperature after heating can be adjusted to the temperature at which a certain gas reacts. In this case, the five impurity-removing metals will react chemically with that gas individually, thereby achieving targeted impurity removal.

[0071] Example 3

[0072] This embodiment is based on Example 1, but the reaction medium is replaced with a more reactive metal, such as sodium. That is, the impurity removal metal 5 is replaced with sodium. Since sodium is more reactive, it can react with the impurity gas more quickly without a very high temperature.

[0073] It is particularly important to note that when installing or replacing the reaction medium, the contact time with the external environment should be minimized to avoid sodium spontaneously combusting at room temperature and creating safety hazards.

[0074] To address this, the entire impurity removal device can be placed in a helium environment to complete the installation or replacement of the reaction medium. Then, by bonding a sealing plate to the outer surface of the upper end cap 2, the internal space of the device can be sealed to prevent a large amount of air from entering. Next, the impurity removal device is removed from the helium environment and fixedly installed inside the airship's gasbag. Before starting to fill with helium, the sealing plate is removed.

[0075] By replacing the reaction medium with sodium, the reaction rate between the impurity metal 5 and the impurity gas can be accelerated, the purification efficiency of helium gas can be improved, and the induction coil 4 does not need to heat the impurity metal 5 to a very high temperature through electromagnetic induction, saving energy and avoiding excessive occupation that affects the normal operation of other equipment on the airship.

[0076] The above embodiments are merely illustrative of the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solutions based on the technical concept proposed in this invention shall fall within the scope of protection of this invention.

Claims

1. A helium impurity removal device built into an airship gasbag, comprising a device body and a reaction medium, wherein the reaction medium is detachably installed inside the device body, characterized in that: The main body of the device includes an aluminum alloy outer shell (1), two aluminum alloy end caps (2), a mica tube (3), an induction coil (4), and a fixing component (6). Both ends of the outer shell (1) can be detachably connected to an end cap (2). The inner cavity of the outer shell (1) is provided with a mica tube (3). The induction coil (4) is surrounded on the outer wall of the mica tube (3). The fixing component (6) is located in the inner cavity of the mica tube (3). The reaction medium is a purification metal (5). The purification metal (5) is coaxially installed in the inner cavity of the mica tube (3) through the fixing component (6). The purification metal (5) reacts chemically with the impurity gas in the airship gasbag under the electromagnetic induction heating effect of the induction coil (4).

2. The airship gasbag built-in helium impurity removal device according to claim 1, characterized in that: The outer shell (1) includes an upper cylinder (13) and a lower cylinder (15), which are detachably connected. The inner wall of the upper cylinder (13) is provided with a first limiting platform (14) for engaging the upper end face of the mica cylinder (3), and the inner wall of the lower cylinder (15) is provided with a second limiting platform (16) for engaging the lower end face of the mica cylinder (3).

3. The airship gasbag built-in helium impurity removal device according to claim 2, characterized in that: The outer wall of the lower cylinder (15) is provided with wiring holes (11) for the terminals of the induction coil (4) to pass through. The outer wall of the lower cylinder (15) is also provided with multiple heat dissipation holes (12) evenly distributed.

4. The airship gasbag built-in helium impurity removal device according to claim 2, characterized in that: The cross-sections of the first limiting platform (14) and the second limiting platform (16) are both "L" shaped, and the surfaces of the first limiting platform (14) and the second limiting platform (16) that are in contact with the mica tube (3) are provided with ultra-thin mica buffer pads.

5. The airship gasbag built-in helium impurity removal device according to claim 1, characterized in that: There is a gap between the middle section of the mica tube (3) and the outer shell tube (1), and the distance of the gap is greater than the diameter of the induction coil (4).

6. The airship gasbag built-in helium impurity removal device according to claim 1, characterized in that: The impurity removal metal (5) is made of magnesium and can be a solid cylindrical metal rod or a hollow cylindrical metal tube.

7. The airship gasbag built-in helium impurity removal device according to claim 6, characterized in that: The fixing component (6) is made of alumina ceramic material. The fixing component (6) includes a fixed bracket (61), a movable bracket (62) and a positioning ring (63). The fixed bracket (61) is located inside the lower end cap (2) and is attached to the bottom of the impurity removal metal (5). The movable bracket (62) is located inside the upper end cap (2) and is attached to the top of the impurity removal metal (5). The positioning ring (63) is sleeved on the outer wall of the impurity removal metal (5) and the outer wall of the positioning ring (63) is attached to the inner wall of the mica cylinder (3).

8. The airship gasbag built-in helium impurity removal device according to claim 7, characterized in that: When the impurity removal metal (5) is a solid cylindrical metal rod, multiple impurity removal metal (5) are provided, and the multiple metal rods are attached to each other to form a combination. The outer wall of the combination is attached to the inner wall of the positioning ring (63).

9. A helium impurity removal device built into an airship gasbag according to claim 7, characterized in that: When the impurity removal metal (5) is a hollow cylindrical metal tube, the impurity removal metal (5) can be a single tube or multiple tubes. The outer wall of a single metal tube is attached to the inner wall of the positioning ring (63). Multiple metal tubes are attached to each other to form a combination. The outer wall of the combination is attached to the inner wall of the positioning ring (63).

10. A method of using a helium impurity removal device built into an airship gasbag according to any one of claims 1-9, characterized in that: Includes the following steps: Step 1: Device assembly and pre-installation. Remove the upper end cap (2), install the impurity removal metal (5) in the inner cavity of the mica tube (3) through the fixing component (6), reinstall the upper end cap (2), and the device is assembled. Pre-install the assembled impurity removal device into the airship gasbag that has not yet been filled with helium, and connect the wiring terminal of the induction coil (4) to the airship's own power supply system. Step 2: Inflate the airship's gasbag with standard purity helium through the gasbag inflation port and check the gasbag's airtightness. Simultaneously complete all routine checks and takeoff preparations before the airship's takeoff. Step 3: After the airship is put into use, a small amount of impurity gas - air - seeps into the airbag. The oxygen in it will directly react with the impurity removal metal (5) at room temperature, reducing the oxygen content in the airbag and keeping the purity of helium in the airbag stable above the industry standard threshold. Step 4: Turn on the power supply. The induction coil (4) is energized to generate a magnetic field. Through electromagnetic induction, the temperature of the impurity removal metal (5) is increased, the reaction rate of the impurity removal metal (5) with oxygen is accelerated, the oxygen content in the airbag is rapidly reduced, and the purity of helium in the airbag is stabilized above the industry standard threshold. Step 5: As the temperature of the impurity-removing metal (5) continues to rise, the temperature of the impurity-removing metal (5) reaches the reaction temperature with nitrogen. The impurity-removing metal (5) reacts chemically with nitrogen, and the nitrogen content in the airbag decreases. Simultaneously, the reaction rate of the impurity-removing metal (5) with oxygen is further accelerated, and the helium purity in the airbag is always maintained above the industry standard threshold. Step 6: Regular maintenance. Through the airship's airbag inflation port, add an appropriate amount of standard purity helium to the airbag to compensate for the gas volume consumed by the chemical reaction between the impurity metal (5) and the impurity gas. Step 7: Change the reaction medium. When the impurity-removing metal (5) no longer reacts chemically with the impurity gas, release the helium gas in the airship gasbag, remove the upper end cap (2), take out the fixing component (6) and the original impurity-removing metal (5), take out the new impurity-removing metal (5) and put it into the inner cavity of the mica tube (3) through the fixing component (6), reinstall the upper end cap (2), and repeat steps 2 to 6.

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