A mobile, vehicle-mounted high-pressure oxygen tank filling device for high-altitude applications

Abstract

This invention discloses a mobile, vehicle-mounted high-pressure oxygen tank filling device for high-altitude applications. An air compression module compresses and stores compressed air; a pre-cooling and purification module removes moisture, carbon dioxide, and hydrocarbons from the air, including a connected pre-cooler and a molecular sieve purifier; a low-temperature fractionation module separates liquid oxygen, including at least a fractionation tower connected to the molecular sieve purifier; an oxygen storage tank stores liquid oxygen; and a filling module includes a high-pressure filling main pipe, a low-pressure filling pipeline, and a high-pressure filling pipeline. The high-pressure filling main pipe is connected to the oxygen storage tank, and the low-pressure and high-pressure filling pipelines are respectively connected to the high-pressure filling main pipe. A pressurization module is installed on the high-pressure filling main pipe. This invention is a mobile integrated oxygen supply system that combines air separation for oxygen production, liquid oxygen pressurization, vaporization reheating, and high-pressure filling. It can reduce oxygen usage costs and make oxygen use more convenient; furthermore, the pressurized oxygen facilitates storage.

Description

Technical Field

[0001] This invention relates to the field of oxygen high-pressure tank filling devices, and in particular to a mobile vehicle-mounted oxygen high-pressure tank filling device for high-altitude applications. Background Technology

[0002] In remote areas, high-altitude outposts, emergency rescue sites, and scientific research laboratories, there is a widespread demand for medical or industrial oxygen. However, traditional oxygen supply methods have the following problems: reliance on steel cylinder transportation: oxygen needs to be liquefied in a central factory and then filled into heavy steel cylinders, resulting in high costs for long-distance transportation, especially in high-altitude areas with inconvenient transportation where supply is difficult to guarantee.

[0003] Currently, the mainstream oxygen supply methods include: 1. Centralized cylinder filling + long-distance transportation, which has problems such as long transportation cycle, high freight cost, and large loss; oxygen purity is easily contaminated and pressure loss is significant; it is not suitable for sudden needs or emergency medical scenarios; 2. Fixed oxygen generation stations + distributed distribution are costly and occupy a large area, making them inflexible for deployment in areas with inconvenient transportation; 3. Small membrane separation or PSA oxygen generators, such as a portable molecular sieve oxygen generation device disclosed in CN201510287654.3; the output pressure is usually below 0.5MPa, which cannot be directly used for high-pressure storage cylinder filling; the purity is generally 90%~95%, which does not meet the requirements for medical high-purity oxygen (≥99.5%); 4. Cryogenic liquid oxygen storage and transportation + external vaporization system, such as the cryogenic liquid pressurized vaporization device disclosed in CN201920678901.1, although it can achieve high-pressure output, it depends on an external liquid oxygen source, does not have independent production capabilities, and cannot be used sustainably in remote areas without liquid oxygen sources. Summary of the Invention

[0004] The purpose of this invention is to provide a mobile vehicle-mounted high-pressure oxygen tank filling device for high-altitude use. This invention is an intelligent, skid-mounted, and mobile integrated oxygen supply system that integrates air separation oxygen generation, liquid oxygen pressurization, vaporization reheating, and high-pressure filling. It can reduce the cost of oxygen use and make oxygen use more convenient; moreover, the oxygen is used under pressure, which facilitates storage.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a mobile vehicle-mounted high-pressure oxygen tank filling device for high-altitude applications, comprising a base, and further comprising: An air compression module, used to compress and store compressed air, includes at least an air compressor. The precooling and purification module, used to remove moisture, carbon dioxide, and hydrocarbons from the air, includes a connected precooler and a molecular sieve purifier, the precooler being connected to an air compression module. A low-temperature fractionation module for separating liquid oxygen includes at least a fractionation column connected to a molecular sieve purifier. An oxygen storage tank, connected to a cryogenic fractionation module, is used to store liquid oxygen. The tank filling module includes a high-pressure tank filling main pipe, a low-pressure gas filling pipeline and a high-pressure gas filling pipeline. The high-pressure tank filling main pipe is connected to the oxygen storage tank. The low-pressure gas filling pipeline and the high-pressure gas filling pipeline are respectively connected to the high-pressure tank filling main pipe. A pressurization module is provided on the high-pressure tank filling main pipe.

[0006] As a further optimization, the fractionation tower is provided with an air inlet at the bottom, a liquid oxygen outlet at the bottom, and a residual gas outlet at the top. A cryogenic heat exchanger is installed at the bottom of the fractionation tower, and the air inlet and residual gas outlet of the cryogenic heat exchanger are connected by a refrigeration pipe, on which an expander is installed. The liquid oxygen outlet is connected to a liquid oxygen outlet pipe, which is connected to an oxygen storage tank, and a liquid oxygen pump is installed on the liquid oxygen outlet pipe.

[0007] As a further optimization, the pressurization module includes a heating heat exchanger and an oxygen booster pump. The heating heat exchanger is connected to the oxygen storage tank to heat the oxygen entering it and deliver the heated oxygen to the high-pressure tank filling main pipe. The oxygen booster pump is used to pressurize the oxygen in the high-pressure tank filling main pipe. A heating heat exchanger is provided on the liquid oxygen outlet pipe, and an oxygen outlet valve is provided between the oxygen storage tank and the heating heat exchanger.

[0008] As a further optimization, the heating heat exchanger is a shell and tube heat exchanger. The heat exchange medium inlet of the shell and tube heat exchanger is connected to the medium outlet of the refrigeration heat exchanger through a waste heat pipe. The heat exchange medium outlet of the shell and tube heat exchanger is connected to a residual gas discharge pipe. A residual gas discharge pipe is connected to the waste heat pipe, and a residual gas discharge valve is installed on the residual gas discharge pipe.

[0009] As a further optimization, the mobile vehicle-mounted high-pressure oxygen tank filling device for high altitudes also includes a cold box for installing at least part of the cryogenic fractionation module. The base is provided with a rotating seat and a driving hydraulic cylinder. The rotating seat is provided with an L-shaped bracket. The bottom and one side of the cold box are fixedly connected to the L-shaped bracket. The L-shaped bracket is connected to the output end of the driving hydraulic cylinder. The base is provided with a pair of support components, which are used to support the L-shaped bracket before and after rotation, respectively.

[0010] As a further optimization, the support assembly includes support columns and positioning plates. A buffer plate is provided between the two support columns. A guide column is provided on the buffer plate that can slide up and down. A buffer pressure plate is provided at the upper end of the pair of guide columns. A buffer spring is sleeved on the outside of the guide column. The upper and lower ends of the buffer spring abut against the buffer pressure plate and the buffer plate, respectively. Support plates are provided on the side plates of the L-shaped bracket. The support plates are provided with upper positioning holes. The support columns are provided with lower positioning holes that penetrate their bodies. A limiting hydraulic cylinder is provided on the buffer plate. A positioning plate is provided at the output end of the limiting hydraulic cylinder. Positioning rods are hinged to both sides of the positioning plate. A positioning pin is hinged to the side of the positioning rod away from the positioning plate. The positioning pin is slidably set in the lower positioning hole. When the L-shaped bracket rotates, the positioning pin is driven to pass through the lower positioning hole and extend into the upper positioning hole.

[0011] As a further optimization, the low-temperature fractionation module is equipped with an oxygen outlet pipe. The free end of the oxygen outlet pipe extends out of the cold box and is equipped with a first fixed connector. The oxygen outlet pipe is equipped with a first control valve. The air inlet of the oxygen storage tank is connected to an oxygen inlet pipe. The oxygen inlet pipe is equipped with a second control valve and an oxygen pump. The free end of the oxygen inlet pipe is equipped with a first movable connector that mates with the first fixed connector. The first fixed connector and the first movable connector are detachably connected. The oxygen outlet pipe and the oxygen inlet pipe constitute a liquid oxygen outlet pipe.

[0012] As a further optimization, the first fixed connector includes a fixed frame and a fixed sleeve. The fixed frame is disposed on the cold box, and the fixed sleeve is disposed inside the fixed frame. The oxygen outlet pipe is connected to the fixed sleeve, and the connection end with the fixed sleeve is a deformable hose. The first movable connector includes an electric cylinder, a drive guide rod, and a movable sleeve. The electric cylinder is disposed on the base, and its output end is connected to a pair of drive guide rods through a drive mounting plate. The drive guide rods are connected to the movable sleeve through a movable connection assembly, and the movable sleeve is connected to the fixed sleeve via a drive.

[0013] As a further optimization, the movable connection assembly includes a sliding member and a movable member. The sliding member is fixed to one end of a pair of drive guide rods away from the drive mounting plate. The movable member is slidably sleeved on the pair of drive guide rods and connected to a movable sleeve that passes through and slides within the sliding member. A drive spring is sleeved on the drive guide rod, and the drive spring is located between the movable member and the drive mounting plate. Two locking mounting plates are symmetrically arranged on the fixed frame. Locking guide rods are slidably mounted on the locking mounting plates. A passive drive block is provided at the end of the locking guide rod. A positioning spring is provided on the locking guide rod between the passive drive block and the locking mounting plate. Drive grooves are provided on both sides of the passive drive block. The moving part is provided with an active driving block, which has a driving block groove that cooperates with the passive driving block. The active driving block has two driving pin holes, and a driving pin is slidably fitted in the driving pin hole. One end of the driving pin extends out of the active driving block and the other end is fixed with a pin nut. A pin spring is provided between the pin nut and the active driving block. The driving pin cooperates with the driving groove on the corresponding side. The locking mounting plate has slider brackets on both sides, and positioning sliders are installed on the slider brackets. The two positioning sliders are symmetrically arranged about the passive driving block. The positioning slider includes an inclined transition section and a horizontal positioning section. The positioning section contacts the driving pin so that the driving pin extends into the driving groove.

[0014] As a further optimization, a positioning mechanism is also included, which includes an eccentric wheel, an eccentric rod, and a middle rod. The fixed sleeve is provided with a mounting part, and an eccentric groove extending into the fixed sleeve is provided on the side of the mounting part. The eccentric wheel is rotatably mounted on the mounting part. The passive drive block is provided with a connecting part. One end of the middle rod is hinged to the connecting part, and the other end is hinged to the eccentric rod. The other end of the eccentric rod is fixedly connected to the eccentric wheel. An arc-shaped groove is provided on the side wall of the movable sleeve near the fixed sleeve. When the movable sleeve extends into the fixed sleeve and the eccentric wheel reaches the eccentric locking position, the end of the eccentric wheel extends into the eccentric groove and the arc-shaped groove in sequence to lock the movable sleeve.

[0015] As a further optimization, the movable connecting assembly is provided with multiple positioning rods. Each positioning rod includes a positioning part and a transition part that is disposed at the end of the positioning part and extends outward. The fixing frame is provided with an elastic washer. The fixing sleeve is disposed inside the elastic washer and is provided with a positioning ring. The positioning part abuts against the positioning ring to position the fixing sleeve and the movable sleeve coaxially.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention is an intelligent, skid-mounted, and mobile integrated oxygen supply system that integrates air separation oxygen generation, liquid oxygen pressurization, vaporization reheating, and high-pressure filling. It can reduce the cost of oxygen use and make oxygen use more convenient. Furthermore, the oxygen is used under pressure, which facilitates storage. 2. In one particular embodiment, a rotatable cold box is used, which can be set up upright or laid down, taking into account both oxygen production and vehicle driving requirements; 3. In a specific embodiment, after the first fixed joint and the first movable joint are connected, they are mechanically locked by an eccentric wheel to ensure high sealing performance and vibration resistance. The electric cylinder drives the active drive block to move, and the drive spring provides preload to achieve smooth connection and reliable locking. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the present invention.

[0018] Figure 2 This is a schematic diagram of the cold box installation according to the present invention.

[0019] Figure 3 This is a structural diagram of the cold box installation of the present invention.

[0020] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0021] Figure 5 This is a structural diagram of the first movable joint and the first fixed joint before they are connected according to the present invention.

[0022] Figure 6 This is a schematic diagram of the first movable joint and the first fixed joint of the present invention being connected.

[0023] Figure 7 This is a structural diagram of the first movable joint and the first fixed joint after they are connected according to the present invention.

[0024] Figure 8 This is a schematic diagram of the engagement between the movable sleeve and the eccentric wheel of the present invention. Detailed Implementation

[0025] The following are specific embodiments of the present invention, which further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0026] like Figures 1 to 2As shown, a mobile vehicle-mounted high-pressure oxygen tank filling device for high-altitude applications includes a base 1, which further includes an air compression module 1A, a pre-cooling and purification module 1B, a low-temperature fractionation module 1C, an oxygen storage tank 6, and a tank filling module 1D. The air compression module 1A is used to compress and store compressed air, and it includes at least an air compressor 8. Preferably, it also includes an air buffer tank 9 connected to the air compressor. The pre-cooling and purification module 1B is used to remove moisture, carbon dioxide, and hydrocarbons from the air, and it includes a pre-cooler 10 and a molecular sieve purifier 11 connected to the air compressor. 10 is connected to the air compression module 1A (air buffer tank 9 in it), the low temperature fractionation module 1C is used to separate liquid oxygen, it includes at least a fractionation column 12 connected to the molecular sieve purifier 11, the oxygen storage tank 6 is connected to the low temperature fractionation module 1C for storing liquid oxygen, the tank filling module 1D includes a high pressure tank filling main pipe 4, a low pressure gas filling pipe 2 and a high pressure gas filling pipe 3, the high pressure tank filling main pipe 4 is connected to the oxygen storage tank 6, the low pressure gas filling pipe 2 and the high pressure gas filling pipe 3 are respectively connected to the high pressure tank filling main pipe 4, and a pressurization module 1E is provided on the high pressure tank filling main pipe 4.

[0027] In this invention, the air compressor 8 is a screw-type air compressor, and the air buffer tank 9 is installed behind the air compressor 8. The air compressor 8 compresses the air to 1 MPa. Since air pressure varies in different regions, the air compressor 8 is needed to compress the atmospheric air to improve the subsequent oxygen purification efficiency. A pre-filter can be installed between the air compressor 8 and the air buffer tank 9 to remove large dust particles. The air buffer tank 9 stabilizes airflow fluctuations to prevent pulsations from affecting downstream equipment. The air buffer tank 9 is connected to the pre-cooler 10. Because the air temperature rises after being compressed by the air compressor 8, the pre-cooler 10 is used to pre-cool the compressed air. A heat exchanger can be installed to pre-cool and lower the temperature of the compressed air to 5-10°C. The cooled air then enters the molecular sieve purifier. 11 Further purification is performed to remove moisture, CO2, and C2H2 from the air; the preferred molecular sieve purifier 11 includes two vertical containers, the upper layer of which is filled with X zeolite and the lower layer is filled with activated alumina. Its matching switching valve group includes four pneumatic ball valves and a regeneration gas electric heater (power: 3-10kW). The regeneration method is air heating followed by backflushing regeneration. The electric heater is installed on the regeneration gas pipeline and is located upstream of the purifier; the pre-cooled air enters the fractionation tower 12 and enters the upper part of the fractionation tower 12. Oxygen is liquefied in the fractionation tower 12 and flows down to the bottom of the fractionation tower 12 and enters the oxygen storage tank 6. Then, from the oxygen storage tank 6, it enters the high-pressure tank filling main pipe 4 and is distributed to the low-pressure filling pipeline 2 and the high-pressure filling pipeline 3 through the pressurization module 1E to complete the subsequent filling, thus realizing the filling of oxygen.

[0028] This invention presents an intelligent, skid-mounted, and mobile integrated oxygen supply system that combines air separation for oxygen generation, liquid oxygen pressurization, vaporization reheating, and high-pressure filling. This system can reduce the cost of oxygen use and make oxygen use more convenient. Furthermore, the pressurized oxygen makes it easy to store.

[0029] Furthermore, the fractionation tower 12 has an air inlet at its lower part, a liquid oxygen outlet at its bottom, and a residual gas outlet at its top. A cryogenic heat exchanger 13 is installed at the bottom of the fractionation tower 12. The air inlet and residual gas outlet of the cryogenic heat exchanger 13 are connected by a refrigeration pipe. An expander 14 is installed on the refrigeration pipe. The liquid oxygen outlet is connected to a liquid oxygen outlet pipe, which is connected to an oxygen storage tank 6. A liquid oxygen pump 15 is installed on the liquid oxygen outlet pipe. The pressurization module 1E includes a heating heat exchanger 16 and an oxygen booster pump 7. A heating heat exchanger is installed on the high-pressure tank charging main pipe 4. 16. The oxygen booster pump 7 is located on the side of the heating heat exchanger 16 away from the oxygen storage tank 6. An oxygen outlet valve is provided between the oxygen storage tank 6 and the heating heat exchanger 16. The oxygen heating heat exchanger 16 is a shell and tube heat exchanger. The heat exchange medium inlet of the shell and tube heat exchanger is connected to the medium outlet of the refrigeration heat exchanger through the waste heat pipe 17. The heat exchange medium outlet of the shell and tube heat exchanger is connected to a residual gas discharge pipe. A residual gas discharge pipe 18 is connected to the waste heat pipe 17. A residual gas discharge valve is installed on the residual gas discharge pipe 18. A heat exchange control valve located between the residual gas discharge pipe 18 and the plate heat exchanger is installed on the waste heat pipe 17. Pre-cooled air enters fractionation tower 12, is cooled by low-temperature heat exchanger 13, and enters the upper part of fractionation tower 12. Oxygen liquefies in fractionation tower 12 and flows down to the bottom of fractionation tower 12. Under the pressure of liquid oxygen pump 15, it enters oxygen storage tank 6. From oxygen storage tank 6, it enters heating heat exchanger 16 for heating and enters high-pressure tank filling main pipe 4. Then, it is pressurized by oxygen booster pump 7 and distributed to low-pressure filling pipeline 2 and high-pressure filling pipeline 3 to complete the subsequent filling, thus realizing the filling of oxygen. The residual gas at the top of the fractionation tower 12 enters the expander 14 for cooling, and then enters the cryogenic heat exchanger 13 to become the cryogenic heat exchange medium for the cryogenic heat exchange gas, reducing the temperature of the cryogenic heat exchanger 13 and cooling the pre-cooled air. After the cryogenic heat exchange, part of the residual gas can be directly discharged through the waste heat pipe 17 and the waste gas discharge pipe 18, while part can be heated by the medium inlet of the plate heat exchanger. The distribution ratio of the residual gas passing through the cryogenic heat exchanger can be adjusted according to the heat required for oxygen heating. Furthermore, the liquid oxygen pump 15 is a cryogenic liquid oxygen pump, which adopts a reciprocating plunger pump. It is installed at the liquid oxygen outlet of the fractionation tower 12, close to the bottom of the fractionation tower 12. The heating heat exchanger 16 adopts a shell-and-tube heat exchanger. The shell side of the shell-and-tube heat exchanger passes through the residual gas, and the heat of the residual gas is used to heat the cryogenic oxygen or liquid-gas mixture, so that the oxygen coming out of the oxygen storage tank 6 becomes gaseous, which facilitates the subsequent oxygen filling.The high-pressure filling pipeline 3 is equipped with a shut-off valve, a pressure gauge, and a check valve in sequence. The check valve can prevent backflow and improve the safety of filling. The low-pressure filling pipeline 2 is equipped with a filling shut-off valve, a pressure gauge, and a check valve in sequence from the pressure reducing valve 5 to the low-pressure filling head. The oxygen separated by the low-temperature airflow module enters the oxygen storage tank 6, and then is distributed to the high-pressure filling pipeline 3 and the low-pressure filling pipeline 2 through the high-pressure tank filling main pipe 4, thereby filling different oxygen cylinders.

[0030] Furthermore, an oxygen pressure stabilizing buffer tank is installed on the high-pressure tank filling main pipe 4. The oxygen pressure stabilizing buffer tank can eliminate airflow pulsation and ensure stable filling pressure.

[0031] Preferred, such as Figures 2 to 4 As shown, the mobile vehicle-mounted high-pressure oxygen tank filling device for high altitudes also includes a cold box 19, which is used to install at least part of the low-temperature fractionation module 1C. Specifically, the fractionation tower 12 and the expander 14 are located inside the cold box 19. The base 1 is provided with a rotating seat 20 and a driving hydraulic cylinder 22. The rotating seat 20 is provided with an L-shaped bracket 21. The bottom end and one side end of the cold box 1 are fixedly connected to the L-shaped bracket 21. The L-shaped bracket 21 is connected to the output end of the driving hydraulic cylinder 22. The base 1 is provided with a pair of support components 240, which are used to support the L-shaped bracket 21 before and after rotation, respectively. The hydraulic cylinder 22 drives the L-shaped support 21 to rotate, thereby enabling the cold box 19 to be erected and lowered. Due to the height of the fractionation tower 12 and the limited height of the vehicle compartment, the fractionation tower 12 and the cold box 19 used to install the fractionation tower 12 need to be lowered during transportation to reduce the overall height and make it suitable for vehicle driving conditions and safety. When oxygen production and filling are required, the fractionation tower 12 and the cold box 19 can be erected to facilitate oxygen production and filling operations. The two support components 240 on both sides of the base 1 can support the L-shaped support 21 when the cold box 19 is erected and when it is lowered. Specifically, when the cold box 19 is erected, the short end of the L-shaped support 21 contacts one support component 240 to support the cold box 19 after it is erected. When the cold box 19 is lowered, the long end of the L-shaped support 21 contacts another support component 240 to support the cold box 19 after it is lowered.

[0032] Furthermore, the support assembly 240 includes support columns 24 and positioning plates 28. A buffer support plate 25 is provided between the two support columns 24. Guide columns 27 are provided on the buffer support plate 25, which can slide up and down. A buffer pressure plate 26 is provided at the upper end of the pair of guide columns 27. A buffer spring 271 is sleeved on the outside of the guide columns 27. The upper and lower ends of the buffer spring 271 abut against the buffer pressure plate 26 and the buffer support plate 25, respectively. Support plates 23 are provided on the side plates (including the short side end and the long side end) of the L-shaped bracket 21. A positioning plate 31 is provided on the support plate 23. The L-shaped bracket 21 is provided with a positioning upper hole 311, and the support column 24 is provided with a positioning lower hole 241 that penetrates its body. The buffer support plate 25 is provided with a limiting hydraulic cylinder 32. The output end of the limiting hydraulic cylinder 32 is provided with a positioning plate 28. Positioning rotating rods 29 are respectively hinged to both sides of the positioning plate 28. A positioning pin 30 is hinged to the side of the positioning rotating rod 20 away from the positioning plate 28. The positioning pin 30 is slidably set in the positioning lower hole 241. When the L-shaped bracket 21 rotates, the positioning pin 30 is driven to pass through the positioning lower hole 241 and then extend into the positioning upper hole 311. Driven by the hydraulic cylinder 22, when the short end of the L-shaped bracket 21 is at the lower end (i.e., the cold box 19 is upright), the support assembly 240 on that side contacts it. First, the buffer plate 26 contacts the support plate 23 on the short end of the L-shaped bracket 21, and the buffer spring 271 is compressed to provide a buffering effect. Then, the support plate 23 contacts the top of the support column 24 to support the L-shaped bracket 21. At this time, the positioning upper hole 311 on the positioning upper plate 31 on the short end of the L-shaped bracket 21 corresponds one-to-one with the positioning lower hole 241 on the support column 24 on that side. The two positioning upper plates 31 are respectively located on the opposite outer sides of the two support columns 24. On the side, the limiting hydraulic cylinder 32 is activated, driving the positioning rotating rod 29 to rotate, which in turn drives the positioning pin 30 to move outward and enter the positioning upper hole 311 of the positioning upper plate 31, thereby limiting the L-shaped bracket 21. When the L-shaped bracket 21 needs to rotate, the limiting hydraulic cylinder 32 extends, driving the positioning rotating rod 29 to rotate, which causes the positioning pin 30 to disengage from the positioning upper hole 311, thus disengaging the positioning pin 30 from limiting the L-shaped bracket 21. When the long side end of the L-shaped bracket 21 is at the lower end (i.e., the cold box 19 is laid down), the corresponding support component 240 on that side performs a similar operation, which can realize the support of the cold box 19 in another state.

[0033] like Figures 5 to 8As shown, the connecting pipe between the bottom of the fractionation tower 12 and the liquid oxygen pump needs to be detachable. Because it is located at the bottom of the overall skid-mounted structure, manually disconnecting the connection when the cold box 19 needs to rotate would cause extreme instability. Therefore, this connection needs to be automatically disconnected and reconnected. At the same time, the high pressure characteristics of oxygen must be considered, placing high demands on the connection. The cryogenic fractionation module 1C (specifically the bottom of the fractionation tower 12) is equipped with an oxygen outlet pipe. The free end of the oxygen outlet pipe extends out of the cold box 19 and is fitted with a first fixed connector 1F. A first control valve is installed on the oxygen outlet pipe. The inlet of the oxygen storage tank 6 is connected to an oxygen inlet pipe, which is fitted with a second control valve and an oxygen pump. The free end of the oxygen inlet pipe is fitted with a first movable connector 1G that mates with the first fixed connector 1F. The first fixed connector 1F and the first movable connector 1G are detachably connected. The oxygen outlet pipe and the oxygen inlet pipe constitute the liquid oxygen outlet pipe. When it is necessary to disconnect the first fixed connector 1F and the first movable connector 1G, the first and second control valves are closed.

[0034] Specifically, the first fixed connector 1F includes a fixed frame 34 and a fixed sleeve 33. The fixed frame 34 is mounted on the cold box 19, and the fixed sleeve 33 is located inside the fixed frame 34. The oxygen outlet pipe is connected to the fixed sleeve 33, and the connection end with the fixed sleeve 33 is a deformable flexible hose. The first movable connector 1G includes a movable sleeve 36, a drive guide rod 37, and an electric cylinder 38. The electric cylinder 38 is mounted on the base 1, and its output end is connected to a pair of drive guide rods 37 through a drive mounting plate 44. The drive guide rods 37 are connected to the movable sleeve 36 through a movable connection assembly 370. The movable sleeve 36 is driven to communicate with the fixed sleeve 33. Driven by the electric cylinder 38, the movable sleeve 36 moves towards the fixed sleeve 33 and inserts into the fixed sleeve 33 to complete the engagement with the fixed sleeve 33. Preferably, the fixed sleeve 33 has an inner flange inside, and the end of the movable sleeve 36 has a sealing ring. After the movable sleeve 36 is inserted into the fixed sleeve 33 and the engagement is completed, the sealing ring and the inner flange are sealed together.

[0035] Preferably, the movable connection assembly 370 includes a sliding member 42 and a movable member 43. The sliding member 42 is fixed to one end of a pair of drive guide rods 37 away from the drive mounting plate 44. The movable member 43 is slidably sleeved on the pair of drive guide rods 42 and connected to a movable sleeve 36 that passes through and slides within the sliding member 42. A drive spring 45 is sleeved on the drive guide rod 37 and is located between the movable member 43 and the drive mounting plate 44. Two locking mounting plates 41 are symmetrically arranged on the fixing frame 34. Locking guide rods 47 are slidably arranged on the locking mounting plates 41. A passive drive block 50 is provided at the end of the locking guide rod 47. A positioning spring 56 is provided on the locking guide rod 47 between the passive drive block 50 and the locking mounting plate 41. Drive grooves 5001 are provided on both sides of the passive drive block 50. An active drive block is provided on the sliding member 42. 51. The active drive block 51 is provided with a drive block groove 5111 that cooperates with the passive drive block 50. The active drive block 51 is provided with two drive pin holes 5112. A drive pin 52 is slidably fitted in the drive pin hole 5112. One end of the drive pin 52 extends out of the active drive block 51 and a pin nut is fixed at the end. A pin spring 53 is provided between the pin nut and the active drive block 51. The drive pin 52 cooperates with the drive groove 5001 on the corresponding side of the passive drive block 51. The locking mounting plate 41 is provided with slider brackets 54 on both sides. Positioning sliders 55 are installed on the slider brackets 54. The two positioning sliders 55 are symmetrically arranged about the passive drive block 50. The positioning sliders 55 include an inclined transition section and a horizontal positioning section. The positioning section contacts the drive pin 52 so that the drive pin 52 extends into the drive groove 5001 of the passive drive block 50. When the first movable joint 1G mates with the first fixed joint 1F, the electric cylinder 38 drives the movable sleeve 36 to move towards the fixed sleeve 33 via the drive guide rod 37 and the movable part 43. The movable sleeve 36 inserts into the fixed sleeve 33 and contacts the inner flange of the fixed sleeve 33. The drive spring 45 is compressed. Preferably, a blocking ring is provided on the side of the fixed sleeve 33 away from the movable sleeve 36. The fixed frame 34 is provided with a limiting block that cooperates with the blocking ring to limit the fixed sleeve 33. The compression of the drive spring 45 causes the fixed sleeve 33 to move slightly away from the movable direction. The limiting block contacts the blocking ring to restrict the fixed sleeve. 33 displacement; then the active drive block 51 contacts the passive drive block 50, that is, the passive drive block 50 is inserted into the drive block groove 5111 on the active drive block 51, the drive pin 52 corresponds to the position of the drive groove 5001, the inclined transition section of the positioning slider 55 contacts the drive pin 52, driving the drive pin 52 to overcome the support of the pin spring 53 and enter the drive groove 5001, then the outside of the drive pin 52 continues to contact the horizontal positioning section of the positioning slider 55, and the drive pin 52 contacts the groove wall of the drive groove 5001, realizing the cooperation between the passive drive block 50 and the active drive block 51.

[0036] Furthermore, it also includes a positioning mechanism 400, which includes an eccentric wheel 46, an eccentric rod 48, and an intermediate rod 49. The fixed sleeve 33 is provided with a mounting part 460, and an eccentric groove that can extend into the fixed sleeve 33 is provided on the side of the mounting part 460. The eccentric wheel 46 is rotatably mounted on the mounting part 460. The passive drive block 50 is provided with a connecting part 490. One end of the intermediate rod 49 is hinged to the connecting part 490, and the other end is hinged to the eccentric rod 48. The other end of the eccentric rod 48 is fixedly connected to the eccentric wheel 46. The movable sleeve 36 is provided with an arc-shaped groove 3601 on the side wall near the fixed sleeve 33. When the movable sleeve 36 extends into the fixed sleeve 33 and the eccentric wheel 46 reaches the eccentric locking position, the end of the eccentric wheel 46 extends into the eccentric groove and the arc-shaped groove 3601 in sequence to lock the movable sleeve 36. After the passive drive block 50 and the active drive block 51 cooperate, the intermediate rod 49 is further driven to swing, so that the eccentric rod 48 rotates in the direction of the movable sleeve 36, causing the eccentric wheel 46 to rotate. After the eccentric wheel 46 rotates, it rotates into the fixed sleeve 33 and into the arc groove 3601, thereby achieving eccentric locking of the fixed sleeve 33 and completing the sealed connection between the movable sleeve 36 and the fixed sleeve 33. When it is necessary to disconnect the connection between the fixed sleeve 33 and the movable sleeve 36, the electric cylinder 38 drives the movable sleeve 36 to move away from the fixed sleeve 33. The drive guide rod 37 starts to move, which drives the sliding member 42 to move and then drives the active drive block 51 to move. The passive drive block 50 moves together with it, which in turn drives the intermediate rod 49 and the eccentric rod 48 to move, causing the eccentric wheel 46 to rotate and disengage from the movable sleeve 36. Then, the drive pin 52 disengages from the positioning slider 55. Under the action of the pin spring 53, the drive pin 52 disengages from the disengagement drive groove 5001. Then, the active drive block 51 disengages from the passive drive block 50. Then, the sliding member 42 contacts the movable member 43, causing the movable sleeve 36 to disengage from the fixed sleeve 33. In the above structure, one end of the positioning spring 56 is connected to the connecting part 490, and the other end is connected to the locking mounting plate 41. The positioning spring 56 ensures that the position of the connecting part 490 is fixed, which can ensure the cooperation between the active drive block 51 and the passive drive block 50. At the same time, it can also fix the relative position of the eccentric rod 48 and the intermediate rod 49, ensuring that their rotation is stable and reliable.

[0037] Furthermore, the movable connection assembly 370 (specifically the sliding plate 42) is provided with four positioning rods 39. Each positioning rod 39 includes a positioning part 391 and a transition part 392 located at the end of the positioning part 391 and extending outward. The fixing frame 34 is provided with an elastic washer, and the fixing sleeve 33 is located inside the elastic washer and is provided with a positioning ring 40. The positioning part 391 abuts against the positioning ring 40 to position the fixing sleeve 33 and the movable sleeve 36 coaxially. Four positioning rods 39 are evenly distributed around the movable sleeve 36. When the electric cylinder 38 drives the movable connecting assembly 370 to move via the drive guide rod 37, it drives the movable sleeve 36 to move towards the fixed sleeve 33. During this process, the transition part 392 on the positioning rod 39 first contacts the positioning ring 40. The elastic deformation performance of the elastic washer can be used to finely adjust the position of the fixed sleeve 33. After the positioning part 391 on the positioning rod 39 contacts the positioning ring 40, the position adjustment of the fixed sleeve 33 is completed, so that the axis of the fixed sleeve 33 is coaxial with the axis of the movable sleeve 36, which can ensure precise docking between the two.

[0038] In this invention, after the first fixed joint 1F and the first movable joint 1G are connected, they are mechanically locked by an eccentric wheel to ensure high sealing performance and vibration resistance. The electric cylinder 38 drives the active drive block 51 to move, and the drive spring provides preload force, which can achieve smooth connection and reliable locking.

[0039] Additionally, the outlet of the molecular sieve purifier 11 is connected to a second movable connector (not shown), and the air inlet of the fractionation tower 12 is connected to a second fixed connector (not shown). The second movable connector and the second fixed connector are detachably connected; the second fixed connector and the second movable connector can be detachably connected by a screw connection. Before rotating the cold box 19, the second fixed connector and the second movable connector need to be opened. After rotating the cold box 19 to the working state, when oxygen generation and filling operations are required, the second fixed connector and the second movable connector are installed and connected so that the purified air enters the fractionation tower for oxygen generation.

[0040] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A mobile vehicle-mounted high-pressure oxygen tank filling device for high-altitude applications, comprising a base, characterized in that, Also includes: An air compression module, used to compress and store compressed air, includes at least an air compressor. The precooling and purification module, used to remove moisture, carbon dioxide, and hydrocarbons from the air, includes a connected precooler and a molecular sieve purifier, the precooler being connected to an air compression module. A low-temperature fractionation module for separating liquid oxygen includes at least a fractionation column connected to a molecular sieve purifier. An oxygen storage tank, connected to a cryogenic fractionation module, is used to store liquid oxygen. The tank filling module includes a high-pressure tank filling main pipe, a low-pressure gas filling pipeline and a high-pressure gas filling pipeline. The high-pressure tank filling main pipe is connected to the oxygen storage tank. The low-pressure gas filling pipeline and the high-pressure gas filling pipeline are respectively connected to the high-pressure tank filling main pipe. A pressurization module is provided on the high-pressure tank filling main pipe.

2. The mobile vehicle-mounted high-pressure oxygen tank filling device for high-altitude use according to claim 1, characterized in that, The fractionation tower has an air inlet at the bottom, a liquid oxygen outlet at the bottom, and a residual gas outlet at the top. A cryogenic heat exchanger is installed at the bottom of the fractionation tower. The air inlet and the residual gas outlet of the cryogenic heat exchanger are connected by a refrigeration pipe, and an expander is installed on the refrigeration pipe. The liquid oxygen outlet is connected to a liquid oxygen outlet pipe, which is connected to an oxygen storage tank. A liquid oxygen pump is installed on the liquid oxygen outlet pipe.

3. The mobile vehicle-mounted high-pressure oxygen tank filling device for high-altitude use according to claim 2, characterized in that, The pressurization module includes a heating heat exchanger and an oxygen booster pump. The heating heat exchanger is connected to the oxygen storage tank and is used to heat the oxygen entering it and deliver the heated oxygen to the high-pressure tank filling main pipe. The oxygen booster pump is used to pressurize the oxygen in the high-pressure tank filling main pipe. A heating heat exchanger is provided on the liquid oxygen outlet pipe, and an oxygen outlet valve is provided between the oxygen storage tank and the heating heat exchanger.

4. The mobile vehicle-mounted high-pressure oxygen tank filling device for high-altitude use according to claim 1 or 2, characterized in that, It also includes a cold box for mounting at least part of the cryogenic fractionation module. The base is provided with a rotating seat and a driving hydraulic cylinder. The rotating seat is provided with an L-shaped bracket. The bottom end and one side end of the cold box are fixedly connected to the L-shaped bracket. The L-shaped bracket is connected to the output end of the driving hydraulic cylinder. The base is provided with a pair of support components, which are used to support the L-shaped bracket before and after rotation, respectively.

5. The mobile vehicle-mounted high-pressure oxygen tank filling device for high-altitude use according to claim 4, characterized in that, The support assembly includes support columns and positioning plates. A buffer plate is provided between two support columns. A guide column is provided on the buffer plate that can slide up and down. A buffer pressure plate is provided at the upper end of a pair of guide columns. A buffer spring is sleeved on the outside of the guide column. The upper and lower ends of the buffer spring abut against the buffer pressure plate and the buffer plate, respectively. Support plates are provided on the side plates of the L-shaped bracket. The support plates are provided with upper positioning holes. The support columns are provided with lower positioning holes that penetrate their bodies. A limiting hydraulic cylinder is provided on the buffer plate. A positioning plate is provided at the output end of the limiting hydraulic cylinder. Positioning rods are hinged to both sides of the positioning plate. A positioning pin is hinged to the side of the positioning rod away from the positioning plate. The positioning pin is slidably set in the lower positioning hole. When the L-shaped bracket rotates, the positioning pin is driven to pass through the lower positioning hole and extend into the upper positioning hole.

6. The mobile vehicle-mounted high-pressure oxygen tank filling device for high-altitude use according to claim 4, characterized in that, The low-temperature fractionation module is equipped with an oxygen outlet pipe. The free end of the oxygen outlet pipe extends out of the cold box and is fitted with a first fixed connector. The oxygen outlet pipe is equipped with a first control valve. The air inlet of the oxygen storage tank is connected to an oxygen inlet pipe. The oxygen inlet pipe is equipped with a second control valve and an oxygen pump. The free end of the oxygen inlet pipe is fitted with a first movable connector that mates with the first fixed connector. The first fixed connector and the first movable connector are detachably connected. The oxygen outlet pipe and the oxygen inlet pipe constitute a liquid oxygen outlet pipe.

7. The mobile vehicle-mounted high-pressure oxygen tank filling device for high-altitude use according to claim 6, characterized in that, The first fixed connector includes a fixed frame and a fixed sleeve. The fixed frame is disposed on the cold box, and the fixed sleeve is disposed inside the fixed frame. The oxygen outlet pipe is connected to the fixed sleeve, and the connection end with the fixed sleeve is a deformable flexible hose. The first movable connector includes an electric cylinder, a drive guide rod, and a movable sleeve. The electric cylinder is disposed on the base, and its output end is connected to a pair of drive guide rods through a drive mounting plate. The drive guide rods are connected to the movable sleeve through a movable connection assembly, and the movable sleeve is connected to the fixed sleeve via a drive.

8. The mobile vehicle-mounted high-pressure oxygen tank filling device for high-altitude use according to claim 7, characterized in that, The movable connection assembly includes a sliding member and a movable member. The sliding member is fixed to one end of a pair of drive guide rods away from the drive mounting plate. The movable member is slidably sleeved on the pair of drive guide rods and connected to a movable sleeve that passes through and slides within the sliding member. A drive spring is sleeved on the drive guide rod, and the drive spring is located between the movable member and the drive mounting plate. Two locking mounting plates are symmetrically arranged on the fixing frame. Locking guide rods are slidably mounted on the locking mounting plates. A passive drive block is provided at the end of the locking guide rod. A positioning spring is provided on the locking guide rod between the passive drive block and the locking mounting plate. Drive grooves are provided on both sides of the passive drive block. The sliding member is provided with... An active drive block is provided with a drive block groove that mates with a passive drive block. The active drive block has two drive pin holes, in which drive pins are slidably fitted. One end of the drive pin extends out of the active drive block and is fixed with a pin nut. A pin spring is provided between the pin nut and the active drive block. The drive pin mates with the drive groove on the corresponding side. A slider bracket is provided on both sides of the locking mounting plate. Positioning sliders are mounted on the slider brackets. The two positioning sliders are symmetrically arranged about the passive drive block. The positioning slider includes an inclined transition section and a horizontal positioning section. The positioning section contacts the drive pin so that the drive pin extends into the drive groove.

9. The mobile vehicle-mounted high-pressure oxygen tank filling device for high-altitude use according to claim 8, characterized in that, It also includes a positioning mechanism, which includes an eccentric wheel, an eccentric rod, and a middle rod. The fixed sleeve is provided with a mounting part, and an eccentric groove extending into the fixed sleeve is provided on the side of the mounting part. The eccentric wheel is rotatably mounted on the mounting part. The passive drive block is provided with a connecting part. One end of the middle rod is hinged to the connecting part, and the other end is hinged to the eccentric rod. The other end of the eccentric rod is fixedly connected to the eccentric wheel. The movable sleeve is provided with an arc-shaped groove on the side wall near the fixed sleeve. When the movable sleeve extends into the fixed sleeve and the eccentric wheel reaches the eccentric locking position, the end of the eccentric wheel extends into the eccentric groove and the arc-shaped groove in sequence to lock the movable sleeve.

10. The mobile vehicle-mounted high-pressure oxygen tank filling device for high-altitude use according to claim 7, characterized in that, The movable connecting assembly is provided with multiple positioning rods. Each positioning rod includes a positioning part and a transition part that is disposed at the end of the positioning part and extends outward. The fixing frame is provided with an elastic washer. The fixing sleeve is disposed inside the elastic washer and is provided with a positioning ring. The positioning part abuts against the positioning ring to position the fixing sleeve and the movable sleeve coaxially.

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