CN207648454U - Aircraft air charging system - Google Patents
Aircraft air charging system Download PDFInfo
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- CN207648454U CN207648454U CN201721477394.5U CN201721477394U CN207648454U CN 207648454 U CN207648454 U CN 207648454U CN 201721477394 U CN201721477394 U CN 201721477394U CN 207648454 U CN207648454 U CN 207648454U
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Abstract
The utility model aim is to provide a kind of aircraft air charging system.Aircraft air charging system provided by the utility model, has the feature that, including：Air source connects mouth, is connect with air source, obtains gas；Gas inlet pipe road portion, for conveying gas；At least one first gas conveying branch portion corresponding waits for pneumatic element for filtered gas to be conveyed to；And second gas conveying branch portion, corresponding wait for pneumatic element for filtered gas to be conveyed to respectively, wherein first gas conveying branch portion has：First transfer pipeline；First pressure reducing valve；First gas supply connects mouth；And first vent valve, it connects mouth with the first gas supply and is arranged in parallel, second gas conveying branch portion has：Low-pressure relief valve；Second transfer pipeline；Second pressure reducing valve；Second gas supply connects mouth；And second vent valve, it connects mouth with the second gas supply and is arranged in parallel.
Description
Technical field
The utility model is specifically related to a kind of aircraft air charging system.
Background technology
During aircraft utilization, need to be inflated tire, hydraulic accumulator, the damper leg etc. in aircraft and
Leak check.In the prior art, in leak check, gas-charging connection is connected with air seal test platform on aircraft, with complete
Pairs of interior of aircraft conveys air, and by checking whether the air of sealing structure is revealed with suds, determines that housing construction is
No sealing, to be resealed to blow-by region, to realize the seal request of body.
But the device is purely manual operation, need to determine the blowing pressure with the operating experience of maintenance personal, and operate
Time is long, and practical efficiency is low, poor reliability.Moreover, there are many places to need the component inflated on aircraft, needed at each component
Air pressure it is different, and inflation with gas is provided by nitrogen cylinder, and the pressure of nitrogen cylinder is higher, so once there is maloperation
It is possible that damaging corresponding component, and then cause safety accident.In addition, device in the prior art is only capable of carrying out a portion every time
Qi of chong channel ascending adversely, deflation and the leak detection of part, so the labor intensity of maintenance personal is big, and working efficiency is relatively low.
Utility model content
The utility model is to carry out to solve the above-mentioned problems, and it is an object of the present invention to provide a kind of aircraft air charging system.
The utility model provides a kind of aircraft air charging system, has the feature that, including：Air source connects mouth, with air source
Connection obtains gas；Gas inlet pipe road portion, for conveying gas；At least one first gas conveying branch portion, is used for mistake
Gas after filter, which is conveyed to, corresponding waits for pneumatic element；And second gas conveying branch portion, for filtered gas to be divided
It is not conveyed to and corresponding waits for pneumatic element, wherein gas inlet pipe road portion has：Intake line, for conveying gas；And mistake
Filter is arranged on intake line, and for filtering transported gas, first gas conveying branch portion has：First delivery pipe
Road is connect with intake line, for conveying gas to waiting for pneumatic element；First pressure reducing valve is arranged on the first transfer pipeline, uses
The blowing pressure for waiting for that pneumatic element needs is reached in the pressure for adjusting gas；First gas supply connects mouth, and setting is in the first conveying
On pipeline, it is located at the downstream side of the first pressure reducing valve, the gas after adjusting is conveyed to and waits for pneumatic element；And first vent valve,
It is arranged on the first transfer pipeline, is located at the downstream side of the first pressure reducing valve, connecing mouth with the first gas supply is arranged in parallel, and second gas is defeated
Branch portion is sent to have：Low-pressure relief valve is connect with intake line, and the pressure for adjusting the gas in intake line reaches
Scheduled low-pressure, at least one second transfer pipeline, connect with low-pressure relief valve, for conveying gas to waiting for pneumatic element；
At least one second pressure reducing valve is arranged on the second transfer pipeline, and the pressure for adjusting gas, which reaches, waits for pneumatic element
The blowing pressure needed；At least one second gas supply connects mouth, is arranged on the second transfer pipeline, is located at the downstream of the second pressure reducing valve
Gas after adjusting is conveyed to and waits for pneumatic element by side；And at least one second vent valve, it is arranged in the second transfer pipeline
On, it is located at the downstream side of the second pressure reducing valve, connecing mouth with the second gas supply is arranged in parallel.
In aircraft air charging system provided by the utility model, it can also have the feature that：Wherein, the first pressure reducing valve
It is adjustable pressure reducing valve with the second pressure reducing valve, first gas conveys branch portion, and also there is first pressure gauge, first pressure gauge to set
It sets between the first pressure reducing valve and the first vent valve, is used to indicate the current pressure of gas in the first transfer pipeline, second gas
Conveying branch portion also has second pressure gauge, and second pressure gauge is arranged between the second pressure reducing valve and the second vent valve, for referring to
Show the current pressure of gas in the second transfer pipeline.
In aircraft air charging system provided by the utility model, it can also have the feature that, further include：Test section,
Wherein, test section includes：Gas detection hose connects mouth and is detachably connected, filled for detecting aircraft with the inflation of pneumatic element is waited for
Whether the air pressure of device of air is normal.
In aircraft air charging system provided by the utility model, it can also have the feature that：Wherein, first gas is defeated
It send branch portion that also there is the first shut-off valve, is arranged between the first pressure reducing valve and the first vent valve, second gas conveys branch portion
Also there is the second shut-off valve, be arranged between the second pressure reducing valve and the second vent valve.
In aircraft air charging system provided by the utility model, it can also have the feature that, further include：Third gas
Convey branch portion, wherein third gas conveying branch portion includes：Bailout gas provides gas；Spare gas circuit, for conveying gas
Body is waited for pneumatic element；Spare pressure regulator valve, the air pressure adjustment of the gas that bailout gas is provided to the air pressure needed；And it is spare
Gas supply connects mouth, is arranged on cushion gas road, the gas after adjusting is conveyed to and waits for pneumatic element.
In aircraft air charging system provided by the utility model, it can also have the feature that：Wherein, aircraft inflation dress
It sets including five first gas conveying branch portions, it includes that three second gas convey branch that second gas, which conveys branch portion,.
The effect of utility model
Aircraft air charging system involved by the utility model is connect because connecing mouth with air source with air source, obtains gas
Body；Gas inlet pipe road portion, for conveying gas；At least one first gas conveying branch portion, is used for filtered gas
It is conveyed to and corresponding waits for pneumatic element；And second gas conveying branch portion, for filtered gas to be conveyed to pair respectively
That answers waits for pneumatic element, wherein first gas conveying branch portion has：First transfer pipeline, connect with intake line, for defeated
Body of supplying gas is waited for pneumatic element；First pressure reducing valve is arranged on the first transfer pipeline, and the pressure for adjusting gas reaches
Wait for the blowing pressure that pneumatic element needs；First gas supply connects mouth, is arranged on the first transfer pipeline, is located under the first pressure reducing valve
Side is swum, the gas after adjusting is conveyed to and waits for pneumatic element；And first vent valve, it is arranged on the first transfer pipeline, is located at
The downstream side of first pressure reducing valve connects mouth with the first gas supply and is arranged in parallel, and second gas conveying branch portion has：Low-pressure relief valve,
It being connect with intake line, the pressure for adjusting the gas in intake line reaches scheduled low-pressure, and at least one
Two transfer pipelines, connect with low-pressure relief valve, for conveying gas to waiting for pneumatic element；At least one second pressure reducing valve, setting
On the second transfer pipeline, the pressure for adjusting gas reaches the blowing pressure for waiting for that pneumatic element needs；It is at least one
Second gas supply connects mouth, is arranged on the second transfer pipeline, is located at the downstream side of the second pressure reducing valve, the gas after adjusting is conveyed to
Wait for pneumatic element；And at least one second vent valve, it is arranged on the second transfer pipeline, is located at the downstream of the second pressure reducing valve
Side connects mouth with the second gas supply and is arranged in parallel, so, the aircraft air charging system of the utility model is using multiple branches thereon
Multiple aircraft components are carried out at the same time inflation, deflation and leak detection, therefore can effectively improve working efficiency.In addition, this dress
Setting also has the advantages that simple and reasonable and investment cost is low etc..Although the device be purely manual operation, be not required to completely with
The operating experience of maintenance personal determines the blowing pressure, even if the air pressure that conveying comes is slightly larger than required air pressure, is connect with gas supply
The component that the vent valve of mouth parallel connection can inflate needs is protected, and is avoided maloperation from causing parts damages, is reduced safe thing
Therefore odds.The aircraft air charging system of the utility model is small, light-weight, and movement is flexible, easy to use, safe to use
Reliably, and it disclosure satisfy that different needs of the different type of machines to different component the blowing pressures, versatility are good.
Description of the drawings
Fig. 1 is the structure diagram of aircraft air charging system in the embodiments of the present invention；
Fig. 2 is the control panel schematic diagram of aircraft air charging system in the embodiments of the present invention；And
Fig. 3 is the structural schematic diagram of aircraft air charging system in the embodiments of the present invention.
Specific implementation mode
In order to make the technical means, creative features, achievement of purpose, and effectiveness of the utility model be easy to understand, with
Lower embodiment combination attached drawing is specifically addressed the utility model aircraft air charging system.
Fig. 1 is the structure diagram of aircraft air charging system in the embodiments of the present invention.
As shown in Figure 1, aircraft air charging system 100 is connect with air source.There is air source gas cylinder 1, high-pressure hose 2 and gas cylinder to go out
Gas connects mouth 3.
Aircraft air charging system 100 meets mouth 4, first gas conveying branch portion of 10, five, gas inlet pipe road portion including air source
20, second gas conveys not shown third gas conveying branch portion and test section in branch portion 30 and figure.
Air source, which connects mouth 4 and connects mouth 3 with the gas cylinder outlet of air source, to be connect, and gas is obtained.
Gas inlet pipe road portion 10 is for conveying gas.Gas inlet pipe road portion 10 has intake line 101 and filtering
Device 5.
Intake line 101 is for conveying gas.
Filter 5 is arranged on intake line 101, for filtering transported gas, prevents the impurity in gas cylinder from entering
Aircraft waits in pneumatic element.
Corresponding pneumatic element is waited for for filtered gas to be conveyed in first gas conveying branch portion 20.First gas
The gas atmosphere for conveying 20 conveying of branch portion is more than the gas atmosphere of 30 conveying of second gas conveying branch portion.
In the present embodiment, 5 20 structures of first gas conveying branch portion are identical, are only the air pressure differences for conveying gas,
Only a first gas conveying branch portion 20 is illustrated herein.
First gas, which conveys branch portion, has the first transfer pipeline 201 (202,203,204,205), the first pressure reducing valve 7
(12,18,23,28), first pressure gauge 8 (13,19,24,29), the first shut-off valve 9 (14,20,25,30), the first vent valve 10
(15,21,26,31) and the first gas supply connect mouth 11 (16,22,27,32).
First transfer pipeline 201 is connect with intake line 101, for conveying gas to waiting for pneumatic element.
First pressure reducing valve 7 is arranged on the first transfer pipeline 201, and the pressure for adjusting gas, which reaches, waits for charging portion
The blowing pressure that part needs.Fixed decompression valve can be used in first pressure reducing valve 7, and adjustable pressure reducing valve can also be used.In the present embodiment
In, the first pressure reducing valve 7 is using adjustable pressure reducing valve.
First pressure gauge 8 is arranged between the first pressure reducing valve 7 and the first shut-off valve 9, is used to indicate in the first transfer pipeline
The current pressure of gas.In the present embodiment, the maximum range of first pressure gauge 8 selects 25Mpa.The maximum of first pressure gauge 13
Measurement range selection 16Mpa.The maximum range of first pressure gauge 19 selects 16Mpa.The maximum range of first pressure gauge 24 selects
2.5Mpa.The maximum range of first pressure gauge 29 selects 2.5Mpa.
The setting of first shut-off valve 9 is connect in the gas supply of first pressure gauge 8 and first between mouth 11.
First gas supply connects mouth 11 and is arranged on the first transfer pipeline 201, is located at the downstream side of the first pressure reducing valve 7, will adjust
Gas afterwards, which is conveyed to, waits for pneumatic element.
First vent valve 10 is arranged on the first transfer pipeline 201, is located at the downstream side of the first pressure reducing valve 7, is supplied with first
Gas connects mouth and is arranged in parallel.Even if the air pressure that comes of conveying is slightly larger than required air pressure, connecing mouth vent valve in parallel with gas supply can be with
The component inflated to needs is protected, and maloperation is avoided to cause parts damages.
Corresponding pneumatic element is waited for for filtered gas to be conveyed to respectively in second gas conveying branch portion 30.
Second gas convey branch portion 30 have low-pressure relief valve 17, the second transfer pipeline 301 (302,303), three the
Two pressure reducing valves 33 (38,43), three second pressure gauges 34 (39,44), three the second shut-off valves 35 (40,45), three second put
Air valve 36 (41,46) and three second gas supply connect mouth 37 (42,47).
Low-pressure relief valve 17 is connect with intake line 101, and the pressure for adjusting the gas in intake line reaches
Scheduled low-pressure.In the present embodiment, pressure is reduced to 1.3Mpa by low-pressure relief valve 17.
Second transfer pipeline 301 is connect with low-pressure relief valve 17, for conveying gas to waiting for pneumatic element.
Second pressure reducing valve 33 is arranged on the second transfer pipeline 301, and the pressure for adjusting gas, which reaches, to wait inflating
The blowing pressure that component needs.Fixed decompression valve can be used in second pressure reducing valve 33, and adjustable pressure reducing valve can also be used.In this implementation
In example, the second pressure reducing valve 33 is using adjustable pressure reducing valve.
Second pressure gauge 34 is arranged between the second pressure reducing valve 33 and the second shut-off valve 9, is used to indicate the second transfer pipeline
The current pressure of middle gas.The range of second pressure gauge 34 is less than the range of first pressure gauge 8.In the present embodiment, the second pressure
The maximum range of power table 34 selects 1.6Mpa.The maximum range of second pressure gauge 39 selects 0.6Mpa.Second pressure gauge 44 is most
Wide range selects 0.1Mpa.
The setting of second shut-off valve 35 is connect in the gas supply of second pressure gauge 34 and second between mouth 37.
Second gas supply connects mouth 37 and is arranged on the second transfer pipeline 301, is located at the downstream side of the second pressure reducing valve 33, will adjust
Gas afterwards, which is conveyed to, waits for pneumatic element.
Second vent valve 36 is arranged on the second transfer pipeline 301, is located at the downstream side of the second pressure reducing valve 33, with second
Gas supply connects mouth 37 and is arranged in parallel.Even if the air pressure that comes of conveying is slightly larger than required air pressure, with the gas supply vent valve that connect mouth in parallel
36 components that can be inflated to needs are protected, and maloperation is avoided to cause parts damages.
When either second gas conveying branch portion does not provide there are problem or air source in first gas conveying branch portion,
The aircraft air charging system of the utility model inflates all parts using third gas conveying branch portion.
Third gas conveying branch portion includes that bailout gas, spare gas circuit, spare pressure regulator valve and spare gas supply connect mouth.
Bailout gas provides gas.
Spare gas circuit is for conveying gas to waiting for pneumatic element.
Air pressure of the air pressure adjustment for the gas that spare pressure regulator valve provides bailout gas to needs.
Spare gas supply connects mouth and is arranged on cushion gas road, and the gas after adjusting is conveyed to and waits for pneumatic element.
Whether the air pressure that test section is used to detect aircraft air charging system is normal.In the present embodiment, test section includes and waits for
The inflation of pneumatic element connects the gas detection hose that mouth is detachably connected and detection pressure gauge.Pneumatic element is waited for when needing to detect
When, inflation is connect into mouth and is connected to detection pressure gauge.
Fig. 2 is the control panel schematic diagram of aircraft air charging system in the embodiments of the present invention.
As shown in Fig. 2, the aircraft air charging system of the present embodiment can be to damper leg, wheel, accumulator, tire and master
Blade is inflated.Air supply valve in fig. 2 is exactly the switch for controlling shut-off valve, and air escape cock is exactly to control opening for vent valve
It closes.The first column of panel is multiple pressure gauges, is from left to right followed successively by gross pressure table, standby pressure table, damper leg high pressure chest pressure
Power table, wheel/rotor brake accumulator and auxiliary hydraulic system pressure gauge, damper leg low pressure chamber pressure gauge, rotor are folded and are stored
Depressor pressure gauge, wheel tire pressure gauge, wheel tire pressure gauge, main blade pressure gauge.Second column is from left to right followed successively by one
The spare pressure regulator valve and multiple air supply valves of a setting, third column are multiple air escape cockes, and the 4th column is from left to right followed successively by
One air source connects mouth and multiple gas supply connect mouth.
Fig. 3 is the structural schematic diagram of aircraft air charging system in the embodiments of the present invention.
As shown in figure 3, since each air pressure for waiting for that pneumatic element needs is different, so the range of the air pressure of output is from 0
~0.06MPa changes to 0~15MPa.Operator can select the gas supply of corresponding air pressure to connect mouth to each on aircraft as needed
A component inflation.4th column right end is that air source connects mouth, gas supply connect mouth from right to left pressure change be 0~15MPa, 0~
9.8MPa, 0~8MPa, 0~1.5MPa, 0~1MPa, 0~0.7MPa, 0~0.35MPa and 0~0.06MPa.
The effect of embodiment
Aircraft air charging system involved by the present embodiment is connect because connecing mouth with air source with air source, obtains gas
Body；Gas inlet pipe road portion, for conveying gas；At least one first gas conveying branch portion, is used for filtered gas
It is conveyed to and corresponding waits for pneumatic element；And second gas conveying branch portion, for filtered gas to be conveyed to pair respectively
That answers waits for pneumatic element, wherein first gas conveying branch portion has：First transfer pipeline, connect with intake line, for defeated
Body of supplying gas is waited for pneumatic element；First pressure reducing valve is arranged on the first transfer pipeline, and the pressure for adjusting gas reaches
Wait for the blowing pressure that pneumatic element needs；First gas supply connects mouth, is arranged on the first transfer pipeline, is located under the first pressure reducing valve
Side is swum, the gas after adjusting is conveyed to and waits for pneumatic element；And first vent valve, it is arranged on the first transfer pipeline, is located at
The downstream side of first pressure reducing valve connects mouth with the first gas supply and is arranged in parallel, and second gas conveying branch portion has：Low-pressure relief valve,
It being connect with intake line, the pressure for adjusting the gas in intake line reaches scheduled low-pressure, and at least one
Two transfer pipelines, connect with low-pressure relief valve, for conveying gas to waiting for pneumatic element；At least one second pressure reducing valve, setting
On the second transfer pipeline, the pressure for adjusting gas reaches the blowing pressure for waiting for that pneumatic element needs；It is at least one
Second gas supply connects mouth, is arranged on the second transfer pipeline, is located at the downstream side of the second pressure reducing valve, the gas after adjusting is conveyed to
Wait for pneumatic element；And at least one second vent valve, it is arranged on the second transfer pipeline, is located at the downstream of the second pressure reducing valve
Side connects mouth with the second gas supply and is arranged in parallel, so, the available multiple branches thereon of aircraft air charging system of the present embodiment are more
A aircraft components are carried out at the same time inflation, deflation and leak detection, therefore can effectively improve working efficiency.In addition, the present apparatus
Also have the advantages that simple and reasonable and investment cost is low etc..Although the device is purely manual operation, it is not required to completely with dimension
The operating experience of personnel is repaiied to determine the blowing pressure, even if the air pressure that conveying comes is slightly larger than required air pressure, mouth is connect with gas supply
The component that vent valve in parallel can inflate needs is protected, and parts damages caused by avoiding maloperation reduce safe thing
Therefore odds.The aircraft air charging system of the present embodiment is small, light-weight, movement it is flexible, easy to use, it is safe to use can
It leans on, and disclosure satisfy that different needs of the different type of machines to different component the blowing pressures, versatility is good.
In addition, when problem occurs certain in aircraft air charging system for air pressure all the way, third gas can be used to convey branch
The all parts of aircraft are inflated in portion, ensure working efficiency.
The above embodiment is the preferred case of the utility model, is not intended to limit the scope of protection of the utility model.
Claims (6)
1. a kind of aircraft air charging system, connect with air source, which is characterized in that including：
Air source connects mouth, is connect with the air source, obtains gas；
Gas inlet pipe road portion, for conveying the gas；
At least one first gas conveying branch portion corresponding waits for pneumatic element for the filtered gas to be conveyed to；
And
Second gas conveys branch portion, for by the filtered gas be conveyed to respectively it is corresponding wait for pneumatic element,
Wherein, gas inlet pipe road portion has：
Intake line, for conveying the gas；And
Filter is arranged on the intake line, for filtering the transported gas,
First gas conveying branch portion has：
First transfer pipeline is connect with the intake line, and pneumatic element is waited for described for conveying the gas；
First pressure reducing valve is arranged on first transfer pipeline, and the pressure for adjusting the gas reaches described wait for
The blowing pressure that pneumatic element needs；
First gas supply connects mouth, is arranged on first transfer pipeline, is located at the downstream side of first pressure reducing valve, after adjusting
The gas be conveyed to and described wait for pneumatic element；And
First vent valve is arranged on first transfer pipeline, is located at the downstream side of first pressure reducing valve, with described first
Gas supply connects mouth and is arranged in parallel,
Second gas conveying branch portion has：
Low-pressure relief valve is connect with the intake line, and the pressure for adjusting the gas in the intake line makes it
Reach scheduled low-pressure；
At least one second transfer pipeline, connect with the low-pressure relief valve, and charging portion is waited for described for conveying the gas
Part；
At least one second pressure reducing valve is arranged on second transfer pipeline, and the pressure for adjusting the gas makes it reach
To the blowing pressure for waiting for pneumatic element and needing；
At least one second gas supply connects mouth, is arranged on second transfer pipeline, is located at the downstream side of second pressure reducing valve,
The gas after adjusting is conveyed to and described waits for pneumatic element；And
At least one second vent valve is arranged on second transfer pipeline, is located at the downstream side of second pressure reducing valve, with
Second gas supply connects mouth and is arranged in parallel.
2. aircraft air charging system according to claim 1, it is characterised in that：
Wherein, first pressure reducing valve and second pressure reducing valve are adjustable pressure reducing valve,
First gas conveying branch portion also has first pressure gauge,
The first pressure gauge is arranged between first pressure reducing valve and first vent valve, and it is defeated to be used to indicate described first
The current pressure of gas described in pipeline is sent,
Second gas conveying branch portion also has second pressure gauge,
The second pressure gauge is arranged between second pressure reducing valve and second vent valve, and it is defeated to be used to indicate described second
Send the current pressure of gas described in pipeline.
3. aircraft air charging system according to claim 2, which is characterized in that further include：
Test section,
Wherein, the test section includes：
Gas detection hose waits for that the air source of pneumatic element connects mouth and is detachably connected with described, for detecting the aircraft inflation dress
Whether the air pressure set is normal.
4. aircraft air charging system according to claim 1, it is characterised in that：
Wherein, first gas conveying branch portion also has the first shut-off valve, and setting is in first pressure reducing valve and described the
Between one vent valve,
Also there is the second shut-off valve, setting to deflate in second pressure reducing valve and described second in second gas conveying branch portion
Between valve.
5. aircraft air charging system according to claim 1, which is characterized in that further include：
Third gas conveys branch portion,
Wherein, third gas conveying branch portion includes：
Bailout gas provides gas；
Spare gas circuit waits for pneumatic element for conveying the gas to described；
Spare pressure regulator valve, the air pressure adjustment of the gas that the bailout gas is provided to the air pressure needed；And
Spare gas supply connects mouth, is arranged on the cushion gas road, and the gas after adjusting is conveyed to and described waits for pneumatic element.
6. aircraft air charging system according to claim 1, it is characterised in that：
Wherein, the aircraft air charging system includes that five first gas convey branch portion,
Second gas conveying branch portion includes that three second gas convey branch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721477394.5U CN207648454U (en) | 2017-11-08 | 2017-11-08 | Aircraft air charging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721477394.5U CN207648454U (en) | 2017-11-08 | 2017-11-08 | Aircraft air charging system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207648454U true CN207648454U (en) | 2018-07-24 |
Family
ID=62884752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721477394.5U Active CN207648454U (en) | 2017-11-08 | 2017-11-08 | Aircraft air charging system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207648454U (en) |
-
2017
- 2017-11-08 CN CN201721477394.5U patent/CN207648454U/en active Active
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