CN115318072B

CN115318072B - Double-drum dryer, gas drying method and portable gas compression supply device

Info

Publication number: CN115318072B
Application number: CN202211019584.8A
Authority: CN
Inventors: 吴博健; 李宗峰; 赵玉洁; 安美珍; 曹娇坤; 王珂
Original assignee: Technology and Engineering Center for Space Utilization of CAS
Current assignee: Technology and Engineering Center for Space Utilization of CAS
Priority date: 2022-08-24
Filing date: 2022-08-24
Publication date: 2023-04-07
Anticipated expiration: 2042-08-24
Also published as: CN115318072A

Abstract

The invention relates to a double-cylinder dryer, a gas drying method and a portable gas compression supply device, wherein the double-cylinder dryer comprises a first drying cylinder and a second drying cylinder which are arranged side by side, the two axial ends of the first drying cylinder are respectively a first gas inlet end and a first gas outlet end, and the two axial ends of the second drying cylinder are respectively a second gas inlet end and a second gas outlet end; the first air inlet end is arranged adjacent to the second air inlet end and is provided with a first reversing valve for switching the air inlet direction, the first air outlet end is arranged adjacent to the second air outlet end and is provided with a second reversing valve for switching the air outlet direction, and the outer side of the first reversing valve is also connected with a third reversing valve for switching the air exhaust direction; the first air outlet end and the second air outlet end are also respectively provided with a first air outlet cavity and a second air outlet cavity which are independent of each other, one end of an air outlet channel of the third reversing valve is communicated with the first air outlet cavity through a first bent pipe, and the other end of the air outlet channel of the third reversing valve is communicated with the second air outlet cavity through a second bent pipe; the second reversing valve is provided with a micro-channel groove.

Description

Double-drum dryer, gas drying method and portable gas compression supply device

Technical Field

The invention relates to the technical field related to gas purification and on-orbit gas filling, in particular to a double-cylinder dryer, a gas drying method and a portable gas compression supply device, and particularly relates to on-orbit gas purification and filling for a scientific experiment cabinet of a space station.

Background

When a plurality of large-scale space scientific experimental equipment or ground experiments are carried out during the operation of the space station on the rail, compressed gas is required to be used, and a gas power source is required to be provided. Particularly, the large experimental platform flying in a non-contact way on the rail needs cold air propulsion to provide power when controlling and maintaining the attitude.

The method is an important problem to be solved urgently, and aims to design a general small-size portable small-gas-quantity stable gas supply device capable of meeting the requirements of narrow space, low power consumption, high pressure and cleanliness, and meanwhile, gas supply of the surrounding space can be continuously and circularly utilized during the on-orbit period, so that the ascending cost of a cargo ship is reduced, automatic control is realized, and a real-time gas supply method is needed.

The currently applied on-orbit gas supply device generally takes a passive pressure-drop type filling system as a main part, the pressure-drop type filling mainly takes a high-pressure filling storage tank as a gas storage unit, and an outlet comprises a stop valve, a high-pressure gauge, a pressure reducing valve, a low-pressure gauge and a filling hose with a pressure relief valve and a filter. The gas supply device is connected with a gas charging interface from a ground gas source before launching, and is filled with high-pressure gas to be carried to a space station through a cargo ship. When gas supply is needed, the gas supply device is operated by an astronaut, the gas supply device is connected to the needed load, the pressure reduction pressure is set, and the stop valve is opened to fill the load. And after the filling is finished, closing the gas supply device and the stop valve of the load, discharging the high-pressure gas in the pipeline through the pressure release valve of the filling hose, and disconnecting the gas supply device from the load after the discharging is finished to finish the whole filling process. The gas supply devices are generally passive because of limited size envelope of the gas supply devices and high pressure limitations of cargo ship delivery, the gas storage of the gas supply devices is limited, and after the gas supply devices are generally used for many times, when the pressure of the stored gas is insufficient, the service life of the whole filling system is prolonged, and the gas supply devices cannot be recycled. In addition, because the gas supply device stores high-pressure gas with high pressure, in order to ensure safety and reliability, the gas supply device has a high enough safety factor in the whole process of ground test, launching and on-orbit, the structural strength of the whole system is required to be enough when the whole system is designed, and strict ground blasting test and evaluation are required to be carried out, so that the weight of the whole system design is overlarge, the proportion of the gas is very small, and the launching cost is overlarge. In addition, when the rail is used, due to the fact that the rail is passive, a spacecraft needs to be matched to complete filling, cost is further increased, and meanwhile, due to the fact that pressure is too large, the spacecraft has relatively large safety risks in the operation process.

The working principle of the air compression device is that the gas pressure is pressurized to reach the required pressure and is output through a gas tank storage or a gas conveying pipeline. The general air compressor is divided into reciprocating piston type, rotary vane type, centrifugal type or rotary screw type, etc. the working principle can be summarized as that after the air is sucked, the mechanical work is applied to increase the pressure of the air, then the air is compressedDischarge through the discharge port, taking as an example a piston compressor of the type which performs compression of the air by reciprocating movement of the piston, the theoretical cycle of which comprises the following three processes, (1) suction process: the piston moves from the top dead center to the bottom dead center, during which the intake flap is opened and air is continuously drawn into the cylinder, and the intake passage is closed when the piston reaches the bottom dead center, as shown in fig. 1a and 1 b. (2) compression process: in this stage, the gas inlet and the gas outlet are both closed, the piston starts to move upwards from the bottom dead center, the gas starts to be compressed until the pressure rises to a certain value P (the pressure is not less than the pressure of the gas outlet), at this moment, the compression process is finished, and the gas outlet is opened, as shown in fig. 2a and 2 b. And (3) an exhaust process: after the air outlet is opened, the piston still moves upwards to exhaust the air at the exhaust pressure P ₁ The lower part is exhausted, when the piston moves to the top dead center, the exhaust port is closed, and the exhaust process is finished. The gas pressurized by the piston is used through the gas outlet as shown in fig. 3a and 3 b.

Air compression devices, particularly piston air compression devices, are commonly used in ground air compressors, air pumps, and the like to obtain high pressure air. Generally, the air compressor has a large volume and weight, a large power and a serious heat generation because of considering the wide application. Some portable compressors can reach a relatively low maximum pressure due to the cylinder design and the motor performance, and cannot meet the performance requirements of portability and high pressure. In addition, the application scene of air compressor machine is comparatively ordinary makes it can not design solitary gas purification device and fall the device of making an uproar, when gaseous cleanliness factor and dew point required when higher, can't satisfy the user demand. These problems make their design impractical for on-rail gas supply applications, and thus the technology has not been applied to on-rail gas supply applications.

In addition, the existing air purification device used in the gas filling system cannot be recycled.

Disclosure of Invention

The technical problems to be solved by the invention are that the existing air purification device used in the gas supply device can not be recycled, and the gas supply device has high cost and safety risk, and can not meet the performance requirements of portability and high pressure. In order to solve the technical problems, the invention provides a double-cylinder dryer, a gas drying method and a portable gas compression supply device.

The technical scheme for solving the technical problems is as follows: a double-cylinder dryer comprises a first drying cylinder and a second drying cylinder which are arranged side by side, wherein the two axial ends of the first drying cylinder are respectively a first air inlet end and a first air outlet end, and the two axial ends of the second drying cylinder are respectively a second air inlet end and a second air outlet end; the first air inlet end is arranged close to the second air inlet end and is provided with a first reversing valve for switching the air inlet direction, the first air outlet end is arranged close to the second air outlet end and is provided with a second reversing valve for switching the air outlet direction, and the outer side of the first reversing valve is also connected with a third reversing valve for switching the air outlet direction; the first air inlet end and the second air inlet end are also respectively provided with a first exhaust cavity and a second exhaust cavity which are independent of each other, one end of an exhaust channel of the third reversing valve is communicated with the first exhaust cavity through a first bent pipe, and the other end of the exhaust channel of the third reversing valve is communicated with the second exhaust cavity through a second bent pipe; the second reversing valve is provided with a micro-channel groove for communicating the first air outlet end with the second air outlet end; the first reversing valve is provided with an air inlet, the second reversing valve is provided with an air outlet, and the third reversing valve is provided with an air outlet.

The invention has the beneficial effects that: according to the double-cylinder dryer, the two drying cylinders are adopted, and the low dew point gas is obtained through the switching instructions of the three reversing valves, and meanwhile, the blowing regeneration of the drying agent can be realized, so that the drying cylinders can be recycled.

On the basis of the technical scheme, the invention can be further improved as follows.

Further, first switching-over valve, second switching-over valve and third switching-over valve are two three way solenoid valves, the intermediate position of first switching-over valve is equipped with the air inlet, the intermediate position of second switching-over valve is equipped with the gas outlet, the intermediate position of third switching-over valve is equipped with the gas vent.

The beneficial effect of adopting the further scheme is that: the air port is arranged in the middle of the reversing valve, so that the air inlet and the air outlet, the exhaust pipeline and the like are conveniently connected, and the air inlet and the air outlet, the exhaust channel and the two drying cylinders are also conveniently communicated.

Further, a first diffuser is arranged in the first exhaust cavity, and a second diffuser is arranged in the second exhaust cavity.

The beneficial effect of adopting the further scheme is that: through setting up the diffuser, the convenient gas through the desicator diffuses, and increase gaseous coverage area makes things convenient for gas outgoing.

A gas drying method is realized by adopting the double-drum dryer, and comprises the following steps:

the first reversing valve communicates the air inlet with a first air inlet end of the first drying cylinder, the second reversing valve communicates the air outlet with a first air outlet end of the first drying cylinder, and the third reversing valve communicates the air outlet with the second bent pipe; the drying method comprises the steps that gas to be dried is input through a gas inlet on a first reversing valve, the gas to be dried is dried through a first drying cylinder to obtain dried gas, most of the dried gas is sent out through a gas outlet of a second reversing valve, a small part of the dried gas enters a second drying cylinder through a micro-channel groove on the second reversing valve, drying agents in the second drying cylinder are blown and regenerated to generate waste gas, and the waste gas passes through a second exhaust cavity and a second bent pipe and is exhausted from an exhaust port of a third reversing valve;

the first reversing valve communicates the air inlet with a second air inlet end of the second drying cylinder, the second reversing valve communicates the air outlet with a second air outlet end of the second drying cylinder, and the third reversing valve communicates the air outlet with the first bent pipe; treat dry gas through the air inlet input on the first switching-over valve, treat that dry gas obtains dry gas after the second drying cylinder is dry, most dry gas is seen off through the gas outlet of second switching-over valve, and the miniflow channel recess that the little dry gas passes through on the second switching-over valve enters into first drying cylinder, blows off the drier in the first drying cylinder and produces waste gas after regeneration, and waste gas passes through first exhaust chamber and first return bend to discharge from the gas vent of third switching-over valve.

The invention has the beneficial effects that: the gas drying method can realize blowing regeneration of the drying agent, so that the drying cylinder can be recycled.

A portable gas compression supply device comprises the double-cylinder dryer, and further comprises an air pump, a one-way valve and a buffer gas cylinder, wherein an air outlet of the air pump is connected with a gas cylinder air inlet of the buffer gas cylinder through a first connecting pipeline, a gas cylinder air outlet of the buffer gas cylinder is connected with an air inlet of the double-cylinder dryer through a second connecting pipeline, and the one-way valve is installed on the first connecting pipeline.

The invention has the beneficial effects that: the portable gas compression supply device has the advantages of compact integral structure, light weight, small volume, capability of working under the condition of people or no people, repeated use and long service life. The portable gas compression supply device can realize high-cleanliness gas supply by compressing air in the cabin, discharge the gas into the cabin after use to achieve the effect of recycling the gas in the cabin, and can also be connected with a gas source to realize the pressurization and purification effects of the gas source. The small-gas-volume scientific demand of narrow space, low power consumption, higher pressure and cleanliness can be met, and the problems of shortage of on-orbit gas resources, small space, limited power supply and the like are solved. Effectively prolong the load operation life of using high-cleanliness gas and reduce the load design scale and complexity.

Furthermore, a safety valve is arranged on the second connecting pipeline, a third connecting pipeline at the air inlet of the air pump is further connected with a silencer and a first filter respectively, and an air outlet pipeline of the double-drum dryer is connected with a second filter.

The beneficial effect of adopting the further scheme is that: through setting up relief valve and muffler, when system gas pressure is too big, but automatic pressure release can make the device stable at operating pressure, noise at work is little etc..

Further, the air pump comprises two air compression pumps connected in series, wherein an air outlet of one air compression pump is opposite to an air inlet of the other air compression pump and is connected with the air inlet of the other air compression pump through a U-shaped pipe; the two air compression pumps connected in series are respectively driven by independent motors or coaxial motors; and pistons in the two air compression pumps are respectively sealed by universal plugs.

The beneficial effect of adopting the further scheme is that: two air compression pumps connected in series are adopted, the air pump is changed from a single-stage parallel connection to a two-stage structure in series connection, and the requirement of 2MPa pressure increase can be met in a long service life through tests.

Furthermore, the air pumps are two groups which are arranged in parallel, and the two groups of air pumps are connected with the air inlet of the air bottle of the buffer air bottle through a first connecting pipeline.

Furthermore, the buffering gas cylinder comprises a sealing shell, two ends of the sealing shell are respectively provided with a quick-release sealing cover, the two quick-release sealing covers are respectively provided with a gas cylinder gas inlet and a gas cylinder gas outlet, and a water absorbing material is arranged in the sealing shell.

The beneficial effect of adopting the further scheme is that: buffer gas adopts quick detach formula seal structure, and inside is equipped with the cotton or the resin that absorbs water, and the liquid water of the condensation that heaies up when can be to air compression collects, prevents that liquid water from getting into the absorption formula desicator and causing the desicator to become invalid, and the material that absorbs water can accomplish the change fast through the quick detach formula structure of buffering gas cylinder, because the liquid water yield of condensation is not big, and the material that absorbs water can use longer life in this subassembly, needn't change frequently. In addition, according to experimental data and relevant theories of engineering thermodynamics, the air pump can produce a large amount of heat because compressed gas does work, so that the temperature of gas discharged from the air pump is higher, and the gas can be rapidly cooled through the buffer gas cylinder and the heat dissipation modules arranged at the gas cylinder, so that the drying capacity of the adsorption dryer is improved.

The air dryer further comprises a control unit, a motor driver, a temperature sensor and a pressure sensor, wherein the pressure sensor is installed on an air outlet pipeline of the double-cylinder dryer, the temperature sensor is installed on the motor driver, the control unit is respectively connected with the motor driver, the pressure sensor, the temperature sensor and a reversing valve of the double-cylinder dryer, and the motor driver is connected with the air pump and drives the air pump to operate.

The beneficial effect of adopting the further scheme is that: the whole gas compression supply device can automatically operate under an unmanned condition, the intellectualization of equipment is improved, the power consumption of the whole system can be better controlled, and the applicability and the reliability of the whole system are improved.

The double-cylinder dryer, the air pump, the one-way valve and the buffer air cylinder are all installed in the filling shell, the double-cylinder dryer, the buffer air cylinder and the air pump are sequentially arranged at intervals, three pairs of cooling fans which are oppositely arranged are arranged on the inner side wall of the filling shell, and two axial ends of the double-cylinder dryer, the buffer air cylinder and the air pump respectively correspond to the pair of cooling fans.

The beneficial effect of adopting the above further scheme is: the arrangement of the filling shell facilitates stable and reliable assembly of all parts, portability is further improved, and the arrangement of the cooling fan improves gas circulation and cooling efficiency.

Drawings

FIG. 1a is a first schematic view of a suction process of a conventional air compressor;

FIG. 1b is a schematic structural diagram of a second conventional air compressor;

FIG. 2a is a first schematic view of a compression process of a conventional air compression apparatus;

FIG. 2b is a schematic structural diagram of a compression process of a conventional air compression device;

FIG. 3a is a first schematic diagram of a prior art air compressor exhausting process;

FIG. 3b is a schematic diagram of a second conventional air compressor exhausting process;

FIG. 4 is a schematic perspective view of a dual drum dryer of the present invention;

FIG. 5 is a schematic front view of a dual drum dryer of the present invention;

FIG. 6 is a first schematic sectional view of a dual drum dryer of the present invention;

FIG. 7 is a second schematic cross-sectional view of a dual drum dryer of the present invention;

FIG. 8 is a schematic cross-sectional view of a second reversing valve of the present invention in one direction;

FIG. 9 is a schematic cross-sectional view of another aspect of the second reversing valve of the present invention;

FIG. 10 is a schematic cross-sectional view of a third reversing valve of the present invention;

FIG. 11 is a schematic perspective view of a third diverter valve according to the present invention;

FIG. 12 is a schematic view of the internal structure of the buffer gas cylinder of the present invention;

FIG. 13 is a schematic front view of the portable gas compressing and supplying apparatus of the present invention;

fig. 14 is a schematic block diagram of the portable gas compression supply apparatus of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a dual drum dryer;

10. a first drying cylinder; 101. a first air inlet end; 102. a first air outlet end;

11. a second drying cylinder; 111. a second air inlet end; 112. a second air outlet end;

12. a first exhaust cavity; 13. a second exhaust chamber; 14. a first diffuser; 15. a second diffuser;

16. a first direction changing valve; 160. an air inlet;

17. a second directional control valve; 170. an air outlet; 171. a micro flow channel groove;

18. a third directional control valve; 180. an exhaust port; 181. a first bend pipe; 182. a second bend; 183. an exhaust passage;

2. an air pump; 21. an air compression pump; 22. a coaxial motor; 23. a U-shaped pipe; 3. a one-way valve; 4. a buffer gas cylinder; 41. sealing the housing; 42. a quick-release sealing cover; 43. a water-absorbing material; 5. a first filter; 51. a second filter; 6. a safety valve; 7. a muffler; 8. a motor driver; 9. a control unit; 91. a pressure sensor; 100. filling the shell; 110. a heat dissipation fan.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.

As shown in fig. 4 to 11, a dual drum dryer 1 of the present embodiment includes a first drying drum 10 and a second drying drum 11 arranged side by side, two axial ends of the first drying drum 10 are a first air inlet end 101 and a first air outlet end 102, respectively, and two axial ends of the second drying drum 11 are a second air inlet end 111 and a second air outlet end 112, respectively; the first air inlet end 101 is arranged adjacent to the second air inlet end 111 and is provided with a first reversing valve 16 for switching an air inlet direction, the first air outlet end 102 is arranged adjacent to the second air outlet end 112 and is provided with a second reversing valve 17 for switching an air outlet direction, and the outer side of the first reversing valve 16 is also connected with a third reversing valve 18 for switching an air outlet direction; the first air inlet end 101 and the second air inlet end 111 are further provided with a first exhaust cavity 12 and a second exhaust cavity 13 which are independent of each other, one end of an exhaust channel 183 of the third reversing valve 18 is communicated with the first exhaust cavity 12 through a first elbow 181, and the other end of the exhaust channel 183 of the third reversing valve 18 is communicated with the second exhaust cavity 13 through a second elbow 182; the second reversing valve 17 is provided with a micro-channel groove 171 for communicating the first air outlet end 102 with the second air outlet end 112; the first reversing valve 16 is provided with an air inlet 160, the second reversing valve 17 is provided with an air outlet 170, and the third reversing valve 18 is provided with an air outlet 180. According to the double-cylinder dryer, two drying cylinders are adopted, and the blowing regeneration of the drying agent can be realized through switching instructions of the three reversing valves while low dew point gas is obtained, so that the drying cylinders can be recycled.

As shown in fig. 6 to 11, the first direction valve 16, the second direction valve 17, and the third direction valve 18 of this embodiment are all two-position three-way electromagnetic valves, an air inlet 160 is disposed in the middle of the first direction valve 16, an air outlet 170 is disposed in the middle of the second direction valve 17, and an air outlet 180 is disposed in the middle of the third direction valve 18. The air port is arranged in the middle of the reversing valve, so that the air inlet and the air outlet, the exhaust pipeline and the like are conveniently connected, and the air inlet and the air outlet, the exhaust channel and the two drying cylinders are also conveniently communicated.

As shown in fig. 6 and 7, a first diffuser 14 is provided in the first exhaust chamber 12, and a second diffuser 15 is provided in the second exhaust chamber 13. Through setting up the diffuser, the convenient gas through the desicator diffuses, and increase gaseous coverage area makes things convenient for gas outgoing. The diffuser of the present embodiment may be a commercially available gas diffuser.

The gas drying method of the present embodiment is implemented by using the above-mentioned dual drum dryer 1, and includes the following steps: the first direction valve 16 communicates the air inlet 160 with the first air inlet end 101 of the first drying cylinder 10, the second direction valve 17 communicates the air outlet with the first air outlet end 102 of the first drying cylinder 10, and the third direction valve 18 communicates the air outlet 180 with the second elbow 182; inputting gas to be dried through an air inlet 160 on a first reversing valve 16, drying the gas to be dried through a first drying cylinder 10 to obtain dry gas, sending out most of the dry gas through an air outlet 170 of a second reversing valve 17, sending a small part of the dry gas into the second drying cylinder 11 through a micro-channel groove 171 on the second reversing valve 17, blowing and regenerating a drying agent in the second drying cylinder 11 to generate waste gas, and discharging the waste gas through a second exhaust cavity 13 and a second bent pipe 182 and an exhaust port 180 of a third reversing valve 18;

the first direction valve 16 connects the air inlet 160 to the second air inlet end 111 of the second drying cylinder 11, the second direction valve 17 connects the air outlet 170 to the second air outlet end 112 of the second drying cylinder 11, and the third direction valve 18 connects the air outlet 180 to the first elbow 181; the gas to be dried is input through the gas inlet on the first reversing valve 16, the gas to be dried is dried through the second drying cylinder 11 to obtain dry gas, most of the dry gas is sent out through the gas outlet 170 of the second reversing valve 17, a small part of the dry gas enters the first drying cylinder 10 through the micro-channel groove 171 on the second reversing valve 17, the drying agent in the first drying cylinder 10 is blown and regenerated to generate waste gas, and the waste gas passes through the first exhaust cavity 12 and the first bent pipe 181 and is exhausted from the exhaust port 180 of the third reversing valve 18.

The gas drying method of the double-cylinder dryer can be repeatedly used, so that the drying agent is recycled, the primarily filtered gas enters the drying agent, the blowing regeneration of the drying agent is realized while the gas with the dew point lower than-40 ℃ is obtained through the structural design and the switching instruction of the electromagnetic valve, the gas can be recycled, and finally the gas with high cleanliness is obtained through the high-pressure filter of the portable gas compression supply device.

As shown in fig. 12 to 14, the portable gas compression supply device of the present embodiment includes the above dual-cylinder dryer 1, and further includes an air pump 2, a one-way valve 3, and a buffer gas cylinder 4, wherein an air outlet of the air pump 2 is connected to an air cylinder inlet of the buffer gas cylinder 4 through a first connecting pipeline, an air cylinder outlet of the buffer gas cylinder 4 is connected to an air inlet of the dual-cylinder dryer 1 through a second connecting pipeline, and the one-way valve 3 is installed on the first connecting pipeline. The portable gas compression supply device of the embodiment has the advantages of compact integral structure, light weight, small volume, capability of working under the manned and unmanned conditions, repeated use for many times and long service life. The air pump of the embodiment can be realized by adopting an existing air compressor.

As shown in fig. 12 and 14, the second connecting pipeline of the present embodiment is provided with a safety valve 6, the third connecting pipeline at the air inlet of the air pump 2 is further connected with a silencer 7 and a first filter 5, respectively, and the air outlet pipeline of the dual-drum dryer 1 is connected with a second filter 51. The first filter 5 may be a low pressure filter, and the second filter 51 may be a high pressure filter. The low pressure filter can adopt a filter screen, and the high pressure filter can filter impurities such as scrap iron, drying agents and the like. Through setting up relief valve and muffler, when system gas pressure is too big, but automatic pressure release can make device operating pressure stable, and noise at work is little etc..

As shown in fig. 12, in a preferred embodiment of the air pump of this embodiment, the air pump 2 includes two air compression pumps 21 connected in series, an air outlet of one air compression pump 21 is arranged opposite to an air inlet of the other air compression pump 21 and is connected through a U-shaped pipe 23; the two air compression pumps 21 connected in series are respectively driven by independent motors or coaxial motors 22; the pistons in the two air compression pumps 21 are respectively sealed by flooding plugs. Two air compression pumps connected in series are adopted, the air pump is changed from a single-stage air pump connected in parallel to a two-stage structure connected in series, namely a two-stage air pump is formed, and the requirement of 2MPa pressurization can be met in a long service life through tests. The air compressor realizes the air compression function by driving a crank-slider mechanism to reciprocate by a motor, arranging a piston at the end of a slider, and matching with a cylinder to form a sealing body to suck, compress and discharge air. The air pump is the second grade cylinder that establishes ties, and in order to guarantee that gaseous cleanness and oil content are enough low, the oil-free lubrication mode is all adopted to the two-stage cylinder, and a motor shaft is shared to two cylinders, and the reciprocating motion that converts into the cylinder through the rotary motion of motor output compresses the acting to gas.

The pump heads of the two air compression pumps 21 connected in series are oppositely arranged, namely, the pump heads are uniformly arranged on one side of the coaxial motor 22, so that the air outlet of one air compression pump 21 is oppositely arranged with the air inlet of the other air compression pump 21, and then the air outlets are connected by adopting the U-shaped pipe 23, thereby saving the assembly space.

A further scheme of this embodiment does, can adopt two sets of air pumps 2, two sets of air pumps 2 connect in parallel and form the parallelly connected second grade pressure intensifying structure of two air pumps, every set of air pump 2 all is connected with first connecting tube and third connecting tube, as shown in fig. 14, be connected with check valve a on the first connecting tube of a set of air pump 2, be connected with muffler a on the third connecting tube of a set of air pump 2, filter a, be connected with check valve B on the first connecting tube of another set of air pump 2, be connected with muffler B on the third connecting tube of another set of air pump 2, filter B. The two air pumps can work simultaneously or independently, and the reliability of the whole system is improved by mutual backup. The rated maximum pressure of the output air pressure of the system is 2MPa, and the working noise is below 60 dB.

As shown in fig. 13, the buffer gas cylinder 4 of this embodiment includes a sealing housing 41, two ends of the sealing housing 41 are respectively provided with a quick-release sealing cover 42, the two quick-release sealing covers 42 are respectively provided with a gas cylinder inlet and a gas cylinder outlet, and a water absorbing material 43 is disposed in the sealing housing 41. Buffer gas adopts quick detach formula seal structure, and inside is equipped with the cotton or the resin that absorbs water, and the liquid water of the condensation that heaies up when can be to air compression collects, prevents that liquid water from getting into the absorption formula desicator and causing the desicator to become invalid, and the material that absorbs water can accomplish the change fast through the quick detach formula structure of buffering gas cylinder, because the liquid water yield of condensation is not big, and the material that absorbs water can use longer life in this subassembly, needn't change frequently. In addition, according to experimental data and relevant theories of engineering thermodynamics, the air pump can produce a large amount of heat because compressed gas does work, so that the temperature of gas discharged from the air pump is higher, and the gas can be rapidly cooled through the buffer gas cylinder and the heat dissipation modules arranged at the gas cylinder, and the drying capacity of the adsorption dryer is improved.

As shown in fig. 12 and 14, the portable gas compression supply apparatus of the present embodiment further includes a control unit 9, a motor driver 8, a temperature sensor and a pressure sensor 91, the pressure sensor 91 is installed on the gas outlet pipeline of the dual drum dryer 1, and the temperature sensor is installed on the motor driver 8 for monitoring the temperature of the motor driver and preventing the temperature of the motor driver from being too high. The control unit 9 is respectively connected with the motor driver 8, the pressure sensor 91, the temperature sensor, and the first direction valve 16, the second direction valve 17, and the third direction valve 18 of the dual-drum dryer 1, and the control unit 9 controls the motor driver 8, the pressure sensor 91, the temperature sensor, and the first direction valve 16, the second direction valve 17, and the third direction valve 18 of the dual-drum dryer 1 to operate through the microcontroller. The motor driver 8 is connected with the air pump 2 and drives the air pump 2 to operate. The temperature sensor is used for feeding back temperature information of the motor driver 8 to the control unit 9, the pressure sensor 91 is used for feeding back filling pressure of the filling device to the control unit 9, the control unit 9 is used for controlling the motor driver 8 to drive the air pump 2 to operate according to the fed-back temperature information and the feeding pressure, the whole gas compression supply device can automatically operate under the unmanned condition, the intellectualization of equipment is improved, meanwhile, the power consumption of the whole system can be better controlled, and the applicability and the reliability of the whole system are improved.

As shown in fig. 14, the portable gas compression supply device of the present embodiment further includes a power supply unit, and a power supply circuit of the power supply unit supplies power to the control interface, the status indicator lamp, and the microcontroller of the control unit 9, and also supplies power to the motor driver 8, the air pump 2, the pressure sensor 91, the temperature sensor, and the dual-drum dryer 1.

As shown in fig. 12, the portable gas compression supply device of this embodiment further includes a filling case 100, the dual-cylinder dryer 1, the air pump 2, the one-way valve 3, and the buffer gas cylinder 4 are all installed in the filling case 100, the dual-cylinder dryer 1, the buffer gas cylinder 4, and the air pump 2 are sequentially arranged at intervals, three pairs of cooling fans 110 arranged oppositely are disposed on an inner side wall of the filling case 100, and two axial ends of the dual-cylinder dryer 1, the buffer gas cylinder 4, and the air pump 2 respectively correspond to one pair of cooling fans 110. The arrangement of the filling shell facilitates stable and reliable assembly of all parts, portability is further improved, and the arrangement of the cooling fan improves gas circulation and cooling efficiency.

The working process of the portable gas compression supply device of the embodiment is that after gas passes through the silencer (the gas source is connected when the gas source is provided) and the low-pressure filter, the gas is sucked into the air compression pump through the primary inlet of the secondary series air pump, the double pumps can work simultaneously or independently, the gas after the primary pressurization enters the secondary pressurization and flows into the one-way valve through the air pump exhaust port. Two gas circuits are converged into one gas circuit at the outlet of the one-way valve to enter a buffer gas cylinder, the gas circuit is cooled by the buffer gas cylinder and condensed water is collected, the gas flows into the double-cylinder dryer from the outlet of the buffer gas cylinder to be adsorbed and dried, the safety valve is arranged in the middle of the section, and the safety valve discharges the gas when the gas circuit exceeds the safety gas pressure. The gas enters the device to be filled through the high-pressure filter and the output interface after being cleaned by the double-cylinder dryer, and pressure measurement and monitoring are simultaneously completed at the rear end.

The portable gas compression supply device of the embodiment can be used for gas filling on the ground, can also be used for on-orbit gas filling of space station loads, and can also be used for other application scenes that the requirements on pressurization, cleanliness and dew point of an access gas source are high, and the requirements on the volume and weight of the filling device are low. The whole weight of this embodiment is light, small, can work under someone and unmanned condition, and used repeatedly many times, long service life. In the embodiment, the preparation of high-pressure gas is completed in a manner that ambient gas or gas source gas is sucked and the gas is pressurized by the secondary gas pump, and ultra-low dew point and ultra-high cleanliness gas with preset pressure is obtained by the control system. The air supply device has the advantages of low rated power, stable air supply pressure and low working noise during working, and the whole device can effectively dissipate heat through the heat dissipation system.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. The gas drying method is characterized by being realized by adopting a double-drum dryer, wherein the double-drum dryer comprises a first drying drum and a second drying drum which are arranged side by side, the two axial ends of the first drying drum are respectively a first gas inlet end and a first gas outlet end, and the two axial ends of the second drying drum are respectively a second gas inlet end and a second gas outlet end; the first air inlet end is arranged close to the second air inlet end and is provided with a first reversing valve for switching the air inlet direction, the first air outlet end is arranged close to the second air outlet end and is provided with a second reversing valve for switching the air outlet direction, and the outer side of the first reversing valve is also connected with a third reversing valve for switching the air outlet direction; the first air inlet end and the second air inlet end are respectively provided with a first exhaust cavity and a second exhaust cavity which are independent of each other, one end of an exhaust channel of the third reversing valve is communicated with the first exhaust cavity through a first bent pipe, and the other end of the exhaust channel of the third reversing valve is communicated with the second exhaust cavity through a second bent pipe; the second reversing valve is provided with a micro-channel groove for communicating the first air outlet end with the second air outlet end; an air inlet is formed in the first reversing valve, an air outlet is formed in the second reversing valve, and an air outlet is formed in the third reversing valve;

the gas drying method comprises the following steps:

2. The gas drying method according to claim 1, wherein the first direction valve, the second direction valve and the third direction valve are two-position three-way solenoid valves, the first direction valve is provided with a gas inlet at a middle position, the second direction valve is provided with a gas outlet at a middle position, and the third direction valve is provided with a gas outlet at a middle position.

3. A gas drying method as claimed in claim 1, wherein a first diffuser is provided in the first exhaust chamber and a second diffuser is provided in the second exhaust chamber.