CN202056511U - Movable integrated CNG storage and transportation gas supply device - Google Patents
Movable integrated CNG storage and transportation gas supply device Download PDFInfo
- Publication number
- CN202056511U CN202056511U CN2011200601791U CN201120060179U CN202056511U CN 202056511 U CN202056511 U CN 202056511U CN 2011200601791 U CN2011200601791 U CN 2011200601791U CN 201120060179 U CN201120060179 U CN 201120060179U CN 202056511 U CN202056511 U CN 202056511U
- Authority
- CN
- China
- Prior art keywords
- gas
- expansion box
- station
- links
- explosion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
A movable integrated CNG storage and transportation gas supply device belongs to the field of a compressed natural gas CNG integrated transportation, storage and supply device. The movable integrated CNG storage and transportation gas supply device comprises the following components: a movable integrated high-pressure gas transport vehicle, a gas adding machine which is provided on a sub-station, a pipeline system, an on-station hydraulic movable platform gas storage tank system which is connected with the pipeline system, and a control system which is provided at a gas adding station. The movable integrated high-pressure gas transport vehicle furthermore comprises the following components: a platform trailer (2), a hydraulic automatic unloading system (3) which is placed on the platform trailer (2), and on-vehicle gas storage tank system (1) which is provided on the hydraulic automatic unloading system (3). Through equipping the on-vehicle moving device and the on-station moving device, CNG gas transportation and storage are integrated. Through controlling by a PLC middle control system, the residual gas of the empty tank is transported to other storage tanks in the platform for ensuring that the residual amount of the gas in the empty tank does not exceed 3%. So the residual amount of the gas in the empty tank is greatly lower than 20% in prior art. Transportation cost and a large amount of energy are saved.
Description
Technical field
The utility model moves integrated CNG accumulating air feeder, relates to the integrated transportation of a kind of compressed natural gas CNG, storage and air feeder, especially can the efficient and convenient utilization that ensures compressed natural gas CNG to greatest extent.
Background technique
At present, rock gas accumulating air supply system, form by refueling mother station, pressurized gas transport vehicle, air entraining substation, and air entraining substation also need be furnished with the pressurized gas transport vehicle chassis of migrating in week, load and unload systems such as device of air, gas storage device, aerator, except the pressurized gas transport vehicle chassis of migrating in week that takies 1,000,000 yuan of prices, it is insufficient that its vehicle-mounted storage tank unloads gas, make the gas about 20%, can't unload only, cause round transport, strengthen cost of transportation, caused the air feed difficulty.
Summary of the invention
The technical problems to be solved in the utility model is: overcome the deficiency that prior art exists, a kind of integrated CNG accumulating air feeder that moves is provided, replaced present rock gas accumulating air supply system, saved the pressurized gas transport vehicle chassis of migrating in week, make vehicle-mounted gas reservoir and hydraulic pressure mobile platform gas reservoir move exchange, making the gas residual compression about 20% is 3%, has made things convenient for the source of the gas turnover.
The technological scheme that its technical problem that solves the utility model adopts is: this moves integrated CNG accumulating air feeder, it is characterized in that: comprise integrated pressurized gas transport vehicle and the filling machine that is installed in the substation, pipe-line system, and the station carrier fluid pressure mobile platform expansion box system that links to each other of pipe-line system of moving, be installed in the control system of gas station, move integrated pressurized gas transport vehicle and comprise flat bed trailer again, be placed in the automatic unloading system of hydraulic pressure on the flat bed trailer and be installed in vehicle-mounted expansion box system on the automatic unloading system of hydraulic pressure.
Vehicle-mounted expansion box system is three separate expansion box/gas holder.
It is that expansion box is carried at three separate 1# stations, expansion box is carried at the 2# station and expansion box is carried at the 3# station that the carrier fluid of standing is pressed mobile platform expansion box system.
Pipe-line system comprises that filling machine, 4# explosion-proof pressure transmitter, the 4th manual ball valve, one-way valve, filter and cylinder manifold carry the pipeline that expansion box links to each other with the station respectively with three the tunnel, on filling machine, 4# explosion-proof pressure transmitter, the 4th manual ball valve, one-way valve and filter is installed in cylinder manifold communicates the main pipe rail, the three tunnel carry the pipelines that expansion box links to each other with the station respectively is connected on the cylinder manifold.
Each road comprises that the ready-packaged joint, manual ball valve, explosion-proof pressure transmitter, explosion-proof solenoid valve, one-way valve and the station that are installed on the pipeline carry expansion box, stands to carry an expansion box and be connected on the cylinder manifold by ready-packaged joint, manual ball valve, explosion-proof pressure transmitter, explosion-proof solenoid valve and one-way valve.
Control system comprises the PLC central control system, control pressurer system, pressure measurement cell, the supercharging performance element, reveal measurement and control unit, the fire-fighting performance element, the performance element of unloading, the sequence valve performance element, background monitoring system, filling machine and vehicle GPS system, the performance element of unloading, the sequence valve performance element links to each other with the PLC central control system respectively, the PLC central control system links to each other with background monitoring system, background monitoring system links to each other with the vehicle GPS system with filling machine, the PLC central control system links to each other with control pressurer system, control pressurer system links to each other with the supercharging performance element with pressure measurement cell, the PLC central control system links to each other with the leakage measurement and control unit, reveals measurement and control unit and links to each other with the fire-fighting performance element.
The vehicle-mounted hydraulic shifter can move horizontally in length and breadth, and 3-4 group can be connected, can mobile respectively CNG gas expansion box/gas holder is transported to and has the station carrier fluid and press mobile platform from moving integrated pressurized gas transport vehicle.
Compare with the gas reservoir of former pressurized gas transport vehicle list group, move integrated pressurized gas transport vehicle and form, and be equipped with the vehicle-mounted hydraulic shifter, can change arbitrarily and respectively organize device by many groups expansion box/gas holder, carry shifter with the station and cooperate, finish the displacement of expansion box/gas holder.
The carrier fluid of standing is pressed mobile platform: be made up of gas station stationary storage platform and hydraulic shifter unit.Described hydraulic shifter unit can move horizontally in length and breadth, vehicle-mounted expansion box/gas holder can be moved to the air feed platform of diverse location respectively.
This station carrier fluid presses mobile platform to be furnished with pressure loading and unloading device of air, and new loading and unloading device of air substitutes compressor and unloads the gas mode, makes expansion box/gas holder residual air reduce to 3% by about 20%, has both saved cost of transportation, has also increased the business benefit.
Whole loading and unloading fortune process and gas storage, supply process are all by gps system, and the computer with gas station and mobile integrated pressurized gas transport vehicle are equipped with carries out remote monitoring.
Compared with prior art, the beneficial effect that mobile integrated CNG accumulating air feeder of the present utility model is had is: by prior art overall gas storage tank being transformed into many group expansion box/gas holder, be equipped with vehicle-mounted and station year shifter, make the CNG gas transport and store integrated, make gas station save standby flat bed trailer chassis, and the loading and unloading device of air by transforming, improved the volume of goods loaded and unloaded of storage tank.Both save construction investment, also improved the air feed benefit, and provided guarantee for the safety in the transportation process.Whole device can be according to the adjustment of device materials, be applicable to the liquefaction energy such as LNG (LNG Liquefied natural gas) LPG (liquefied petroleum gas) DME (dimethyl ether) simultaneously, have good economy and social benefit, filled up a blank of domestic and international gas energy transportation supply.Pressure loading and unloading device of air by PLC central control system control simultaneously is transported to other storage tank in the platform with the residual air in the low pressure jar, guarantees that the gas surplus in the slack tank is no more than 3%.Make the slack tank remaining volume be significantly less than 20% of prior art, minimize transport costs and a large amount of energy.
Description of drawings
Fig. 1: move integrated pressurized gas transport vehicle structural representation;
Fig. 2: substation pipe-line system structural representation;
Fig. 3: control system circuit theory diagrams.
Fig. 4: control pressurer system FB(flow block);
Fig. 5: reveal the measurement and control unit FB(flow block);
Fig. 6: background monitoring FB(flow block);
Fig. 7: reveal the measurement and control unit FB(flow block);
Fig. 1-the 7th, the utility model move the most preferred embodiment of integrated CNG accumulating air feeder.Wherein:
Automatic unloading system 4 first ready-packaged joints of 1 vehicle-mounted expansion box system's 2 platform trailers, 3 hydraulic pressure 5 second ready-packaged joints 6 the 3rd ready-packaged joint 7 first manual ball valves 8 second manual ball valves 9 the 3rd manual ball valve 101# explosion-proof pressure transmitter 11 2# explosion-proof pressure transmitters 12 3# explosion-proof pressure transmitters 13 first explosion-proof solenoid valves 14 second explosion-proof solenoid valves 15 the 3rd explosion-proof solenoid valve 16 first check valves 17 second check valves 18 the 3rd check valve 19 bus-bars 20 the 4th check valve 21 the 4th manual ball valve 22 4# explosion-proof pressure transmitters 23 first single tube CNG filling machines 24 second single tube CNG filling machines 25 filters 26 the 5th manual ball valve 27 the 6th manual ball valve 28 1# carry at the station year expansion box 30 a 3# station, expansion box 29 2# station and carry expansion box.
Embodiment
Below in conjunction with accompanying drawing 1-7 the utility model being moved integrated CNG accumulating air feeder is described further:
With reference to Fig. 1
Moving integrated pressurized gas transport vehicle is made up of vehicle-mounted expansion box system 1, flat bed trailer 2, the automatic unloading system 3 of hydraulic pressure.Vehicle-mounted expansion box system 1 be three separate connect, dismountable expansion box/gas holder, the automatic unloading system 3 of hydraulic pressure is placed on the flat bed trailer 2, vehicle-mounted expansion box system 1 is installed on the automatic unloading system 3 of hydraulic pressure.
With reference to Fig. 2
Pipe-line system comprises filling machine, 4# explosion-proof pressure transmitter 22, the 4th manual ball valve 21, the 4th one-way valve 20, filter 25 and cylinder manifold 19 and three tunnel pipelines that link to each other with expansion box, the first single tube CNG filling machine 23 and the 5th manual ball valve 26, the second single tube CNG filling machine 24 and the 6th manual ball valve 27,4# explosion-proof pressure transmitter 22, the 4th manual ball valve 21, the 4th one-way valve 20 and filter 25 are installed on the main pipe rail that communicates with cylinder manifold 19, and three tunnel pipelines that link to each other with expansion box are connected on the cylinder manifold 19.
The first via comprises first ready-packaged joint 4, first manual ball valve 7,1# explosion-proof pressure transmitter 10, first explosion-proof solenoid valve 13 and first one-way valve 16 and the 1# station year expansion box 28 that is installed on the pipeline, and 1# carries at the station expansion box 28 and is connected on the cylinder manifold 19 by first ready-packaged joint 4, first manual ball valve 7,1# explosion-proof pressure transmitter 10, first explosion-proof solenoid valve 13 and first one-way valve 16.
The second the tunnel comprises second ready-packaged joint 5, second manual ball valve 8,2# explosion-proof pressure transmitter 11, second explosion-proof solenoid valve 14 and second one-way valve 17 and the 2# station year expansion box 29 that is installed on the pipeline, and 2# carries at the station expansion box 29 and is connected on the cylinder manifold 19 by second ready-packaged joint 5, second manual ball valve 8,2# explosion-proof pressure transmitter 11, second explosion-proof solenoid valve 14 and second one-way valve 17.
Third Road comprises the 3rd ready-packaged joint 6, the 3rd manual ball valve 9,3# explosion-proof pressure transmitter 12, the 3rd explosion-proof solenoid valve 15 and the 3rd one-way valve 18 and the 3# station year expansion box 30 that is installed on the pipeline, and 3# carries at the station expansion box 30 and is connected on the cylinder manifold 19 by the 3rd ready-packaged joint 6, the 3rd manual ball valve 9,3# explosion-proof pressure transmitter 12, the 3rd explosion-proof solenoid valve 15 and the 3rd one-way valve 18.
According to design scale, can also design and be less than or more than three the tunnel.
Vehicle-mounted expansion box system 1 by the automatic unloading system 3 of hydraulic pressure unload carry the gas storage platform to the station after, the ready-packaged joint (female) that 1#-3# carries at the station expansion box joins with the ready-packaged joint (4-6 male) of pipe-line system; Open first to the three manual ball valve 7-9,1#-3# explosion-proof pressure transmitter 10-12 measures and an expansion box 28-30 zero load is carried at judgement 1#-3# station, underload and fully loaded, and the state of measurement and judgement 1#-3# station year expansion box is a high pressure, the middle pressure, low pressure, or the pressure P 2 of empty bottle, when the 5th to the 6th manual ball valve 26-27 of first to the second single tube CNG filling machine 23-24 is in normally open work, first to the second single tube CNG filling machine 23-24 internal electrical magnet valve is opened, vehicle-mounted gas cylinder is identical with pipeline, and what 4# explosion-proof pressure transmitter 22 was measured at this moment is the pressure P 1 of vehicle-mounted steel cylinder.Control system compares P2 and P1 according to pressure reduction, optionally opens or close first to the 3rd explosion-proof solenoid valve 14-16, satisfies the aerating requirement.
With reference to Fig. 3
Control system comprises the PLC central control system, control pressurer system, pressure measurement cell, the supercharging performance element, reveal measurement and control unit, the fire-fighting performance element, the performance element of unloading, the sequence valve performance element, background monitoring system, filling machine and vehicle GPS system, the performance element of unloading, the sequence valve performance element links to each other with the PLC central control system respectively, the PLC central control system links to each other with background monitoring system, background monitoring system links to each other with the vehicle GPS system with filling machine, the PLC central control system links to each other with control pressurer system, control pressurer system links to each other with the supercharging performance element with pressure measurement cell, the PLC central control system links to each other with the leakage measurement and control unit, reveals measurement and control unit and links to each other with the fire-fighting execution.
Pressure measurement cell measuring system pressure everywhere at first, and the result is sent to control pressurer system, control pressurer system is according to the requirement of PLC central control system, judge whether to give the expansion box system to carry out supercharging and opening sequence valve performance element whether, then the supercharging performance element carries out blower operations if desired, reveals the leakage of measurement and control unit measurement petroleum gas until reaching setting pressure, in case leakage is arranged, the fire-fighting performance element is reported to the police and is closed solenoid valve and filling machine power supply, carries out fire-fighting system and opens.Background monitoring system is monitored the data of system, and the vehicle GPS system carries out information interchange with mobile integrated pressurized gas transport vehicle.
With reference to Fig. 6
Background monitoring system:
The main task of system is: carry out real-time data communication with center system, filling machine, vehicle GPS system, and can send instruction to disperse system, and data gather, storage, inquiry, report printing function.
With reference to Fig. 7
Center system:
The main task of system is: carry out the real time data communication with background monitoring system, control pressurer system, leakage measurement and control unit, the instruction that the reception background monitoring system sends is also carried out; Receive the measuring and control data of revealing measurement and control unit, control pressurer system, and data are done Macro or mass analysis, instruct respectively to them according to analyzing.
With reference to Fig. 4-5 controlling method
Reveal measurement and control unit:
Reveal measurement and control unit and center system and carry out communication, interactive information; System 1#~7# gas-sensing probe carries out DATA REASONING, compare judgement with the secure data of setting, in case any one gas-sensing probe survey data of 1#~7# is greater than secure data, then carry out successively and cut off all solenoid valves of actuator and filling machine power supply, pneumatic valve cuts out the cut-out source of the gas automatically, acoustooptic alarm (eliminate the hand reset instruction back of carrying out leakage alarm); Put flag bit BIT=1,, carry out next round again and detect if 1#~7# gas-sensing probe survey data is then returned starting point all less than secure data and put flag bit BIT=0; If 1#~7# gas-sensing probe survey data is all less than secure data and put flag bit BIT=1, then carry out the hand reset program of leakage alarm, after pressing the hand reset of leakage alarm, put that flag bit BIT=0, actuator are charged, pneumatic valve is opened, the acoustooptic alarm action is eliminated; If not by the hand reset of leakage alarm then cut off actuator's power supply, pneumatic valve cuts off source of the gas, and the acoustooptic alarm action is being carried out always.
Control pressurer system:
Control pressurer system and center system are carried out communication, after the interactive information, begin 1#~3# explosion-proof pressure transmitter 10-12 is carried out DATA REASONING, and each self-metering data compared, judge the 1# station and carry an expansion box 28,2# station to carry state that an expansion box 29,3# station carry expansion box 30 be high pressure, middle pressure, low pressure, or empty van? if empty van acoustooptic alarm then; If be lower than setting value, then the setting maximum value is carried out and be pressurized to compress cell, the supercharging number of times increases by one, after 4# explosion-proof pressure transmitter 22 survey data, if this moment, the filling machine solenoid valve was not opened, then program is returned starting point, if aerating and solenoid valve are opened, system is according to 4# explosion-proof pressure transmitter 22 survey data, carry the situation that an expansion box 28,2# station carry high pressure that an expansion box 29,3# station carry expansion box 30, low pressure, middle pressure in conjunction with 1# station and open the execution sequence control unit, begin to return starting point at last to outer metering conveying gas.
The above, it only is preferred embodiment of the present utility model, be not to be the restriction of the utility model being made other form, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every technical solutions of the utility model content that do not break away to any simple modification, equivalent variations and remodeling that above embodiment did, still belongs to the protection domain of technical solutions of the utility model according to technical spirit of the present utility model.
Claims (6)
1. move integrated CNG accumulating air feeder, it is characterized in that: comprise integrated pressurized gas transport vehicle and the filling machine that is installed in the substation, pipe-line system, and the station carrier fluid pressure mobile platform expansion box system that links to each other of pipe-line system of moving, be installed in the control system of gas station, move integrated pressurized gas transport vehicle and comprise flat bed trailer (2) again, be placed in the automatic unloading system of hydraulic pressure (3) on the flat bed trailer (2) and be installed in vehicle-mounted expansion box system (1) on the automatic unloading system of hydraulic pressure (3).
2. mobile integrated CNG accumulating air feeder according to claim 1, it is characterized in that: vehicle-mounted expansion box system (1) is three separate expansion box/gas holder.
3. mobile integrated CNG accumulating air feeder according to claim 1 is characterized in that: it is that an expansion box (30) is carried at three a separate 1# station year expansion box (28), 2# station year expansion box (29) and 3# stations that the carrier fluid of standing is pressed mobile platform expansion box system.
4. mobile integrated CNG accumulating air feeder according to claim 1, it is characterized in that: pipe-line system comprises filling machine, 4# explosion-proof pressure transmitter (22), the 4th manual ball valve (21), the 4th one-way valve (20), filter (25) carries the pipeline that expansion box links to each other with the station with cylinder manifold (19) respectively with three the tunnel, filling machine, 4# explosion-proof pressure transmitter (22), the 4th manual ball valve (21), the 4th one-way valve (20) and filter (25) are installed on the main pipe rail that communicates with cylinder manifold (19), and three tunnel pipelines that link to each other with station year expansion box respectively are connected on the cylinder manifold (19).
5. mobile integrated CNG accumulating air feeder according to claim 4, it is characterized in that: each road comprises that the ready-packaged joint, manual ball valve, explosion-proof pressure transmitter, explosion-proof solenoid valve, one-way valve and the station that are installed on the pipeline carry expansion box, stands to carry an expansion box and be connected on the cylinder manifold (19) by ready-packaged joint, manual ball valve, explosion-proof pressure transmitter, explosion-proof solenoid valve and one-way valve.
6. mobile integrated CNG accumulating air feeder according to claim 1, it is characterized in that: control system comprises the PLC central control system, control pressurer system, pressure measurement cell, the supercharging performance element, reveal measurement and control unit, the fire-fighting performance element, the performance element of unloading, the sequence valve performance element, background monitoring system, filling machine and vehicle GPS system, the performance element of unloading, the sequence valve performance element links to each other with the PLC central control system respectively, the PLC central control system links to each other with background monitoring system, background monitoring system links to each other with the vehicle GPS system with filling machine, the PLC central control system links to each other with control pressurer system, control pressurer system links to each other with the supercharging performance element with pressure measurement cell, the PLC central control system links to each other with the leakage measurement and control unit, reveals measurement and control unit and links to each other with the fire-fighting performance element.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2011200601791U CN202056511U (en) | 2011-03-09 | 2011-03-09 | Movable integrated CNG storage and transportation gas supply device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2011200601791U CN202056511U (en) | 2011-03-09 | 2011-03-09 | Movable integrated CNG storage and transportation gas supply device |
Publications (1)
Publication Number | Publication Date |
---|---|
CN202056511U true CN202056511U (en) | 2011-11-30 |
Family
ID=45016483
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN2011200601791U Expired - Fee Related CN202056511U (en) | 2011-03-09 | 2011-03-09 | Movable integrated CNG storage and transportation gas supply device |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN202056511U (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102174988A (en) * | 2011-03-09 | 2011-09-07 | 山东齐能能源技术有限公司 | Moving integrated CNG (compressed natural gas) storage and transportation gas supplying device and control method |
CN108930911A (en) * | 2018-06-13 | 2018-12-04 | 浙江昊凡科技有限公司 | A kind of supply method and system of hydrogenation stations hydrogen energy source |
-
2011
- 2011-03-09 CN CN2011200601791U patent/CN202056511U/en not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102174988A (en) * | 2011-03-09 | 2011-09-07 | 山东齐能能源技术有限公司 | Moving integrated CNG (compressed natural gas) storage and transportation gas supplying device and control method |
CN102174988B (en) * | 2011-03-09 | 2013-04-24 | 刘圣华 | Moving integrated CNG (compressed natural gas) storage and transportation gas supplying device and control method |
CN108930911A (en) * | 2018-06-13 | 2018-12-04 | 浙江昊凡科技有限公司 | A kind of supply method and system of hydrogenation stations hydrogen energy source |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN102174988B (en) | Moving integrated CNG (compressed natural gas) storage and transportation gas supplying device and control method | |
Reddi et al. | Techno-economic analysis of conventional and advanced high-pressure tube trailer configurations for compressed hydrogen gas transportation and refueling | |
CN203082530U (en) | L-CNG (liquefied-compressed natural gas) station | |
CN103672394B (en) | A kind of without pump LNG refueling system and LNG Liquefied natural gas processing method | |
CN201057357Y (en) | Mobile liquefied natural gas gasifying and supplying plant | |
CN105864636B (en) | LNG filling stations unload without pump, fill, charging system and fill technique | |
CN111457246B (en) | Hydrogen storage type hydrogen filling station | |
CN101509599A (en) | Secondary gas filling station | |
CN203190027U (en) | Skid-mounted compressed natural gas automobile refueling device | |
CN102200220A (en) | Liquefied natural gas (LNG) filling station and gas filling method of LNG | |
CN203656565U (en) | Pump-free LNG (Liquefied Natural Gas) filling system | |
CN101793347A (en) | Gas filling station | |
CN202056511U (en) | Movable integrated CNG storage and transportation gas supply device | |
CN103511829A (en) | Full-automatic purging, replacing and hydrogen-filling system of ultrahigh-pressure hydrogen environment material testing machine | |
CN105020574A (en) | L-CNG gas station | |
CN107620859B (en) | Unpowered natural gas trailer assembly with cycle alternation control system and control method | |
CN101463943B (en) | Energy-saving natural gas supply sub-station system | |
JP2006173068A (en) | Hydrogen supply system for fuel cell vehicle | |
CN202501194U (en) | Energy-saving high-and-low-pressure nitrogen supply system | |
CN202469480U (en) | Liquefied natural gas filling gas machine | |
CN214093971U (en) | Pressurization system of vehicle-mounted LNG receiving platform | |
CN111237633A (en) | Movable simple gas filling substation | |
CN107620866B (en) | Unpowered natural gas filling station with circulation alternate control system and control method | |
CN211667585U (en) | Small-size liquefied natural gas loading sledge of backing a car | |
CN115959483A (en) | Powder low-pressure conveying system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111130 Termination date: 20140309 |