CN203810028U - Main-sub pot-type combined container for liquid nitrogen - Google Patents
Main-sub pot-type combined container for liquid nitrogen Download PDFInfo
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- CN203810028U CN203810028U CN201420074758.5U CN201420074758U CN203810028U CN 203810028 U CN203810028 U CN 203810028U CN 201420074758 U CN201420074758 U CN 201420074758U CN 203810028 U CN203810028 U CN 203810028U
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Abstract
The utility model relates to a main-sub pot-type combined container for liquid nitrogen. The main-sub pot-type combined container comprises sub pots, a pipeline system, an interlayer, a main pot, a measurement and control system, safety accessories and an external operation platform. The combined container for the liquid nitrogen is coated with paint outside and mounted on a basic platform; five sub pots are concentrically arranged to form an equilateral polygon; the pipeline system is arranged in a center area from five sub pots to the main pot; the structure of each sub pot is vertical cylinder-shaped; the bottoms of the sub pots are supported by support legs; a filling opening, an air outlet, an external pressurization opening and an upper shifting filling opening are formed in each pot. The combined container can be used for implementing the processes of shifting filling, pressurization, pressure release, and real-time monitoring and control, and is ideal large-sized liquid nitrogen storage and supply equipment. The container is used for storage and supply of the liquid nitrogen, liquid is discharged out through a pressure extrusion method, the operation is simple and convenient, the reliability is high, discharge loss during the storage period is reduced through storage under pressure, compared with a spherical tank, the main-sub pot-type combined container is easier to manufacture and mount, and the manufacturing and mounting costs are low, so that the container has higher security, stability and controllability.
Description
Technical field
The utility model relates to a kind of liquid nitrogen container, relates in particular to a kind of primary and secondary pot type liquid nitrogen combination container.
Background technique
Primary and secondary pot type combination container formula refers to have multiple sub-tanks (more than three) and composes in parallel inner canister, to meet the requirement of the large capacity storage in cryogenic liquide storage station liquid.Many sub-tanks are assembled in female tank side by side.It is advantageous that, thereby employing pressure extrusion way does not need exterior liquid, infusion pump discharge opeing is easy and simple to handle, reliability is high, storage with pressure reduces emission loss in storage period, manufacture to install and more easily realize compared with spherical tank, manufacture installation cost is low, primary and secondary pot type combination container can be realized metaideophone, filling, supercharging, pressure release and the process of monitoring in real time, is therefore the storage supply equipment of desirable large-scale low-temperature liquid.If for liquid nitrogen supply container, will make large-scale liquid nitrogen storage supply equipment there is higher Economy, stability, controllability, but it be as follows to exist main design problem in existing design this form:
(1) for large-scale low-temperature container, the method for the design of the adiabatic form of interlayer and filling pearlife;
(2) common single safety attachment is set, the hysteresis quality of safety valve and rupture disk disposable, is difficult to meet Security;
(3) for the design of female tank structure;
(4) all liquid phases are drawn outer tank pipeline, the form of pipe joint;
(5) how to improve the convenience that primary and secondary tank operates;
(6) when how sub-tank feed liquor avoids topping up, local temperature difference stress is excessive;
(7) perfect design of detecting and controlling system;
(8), for large-scale low-temperature container, reduce the structural design of cold damage;
(9) comprehensive Design of low flow rate filling and large flow rate filling.
Model utility content
The utility model, for above-mentioned problems of the prior art, provides a kind of primary and secondary pot type liquid nitrogen combination container, has solved the problems of the prior art.
To achieve these goals, the technical solution of the utility model is as follows:
Primary and secondary pot type liquid nitrogen combination container, include one from the sub-tank of supercharging, four common sub-tanks, pipe-line system, interlayer, female tank, TT&C system, safety attachment and peripheral operation platform, liquid nitrogen combination container is installed on basic platform, five concentric regular polygons of sub-tank are arranged, pipe-line system is arranged in the location at five sub-Guan Zhimuguan centers, five sub-jar structures are vertical type cylinder shape, sub-pot bottom is that supporting leg supports, five sub-tanks are provided with filler, relief opening, outer boost port and upper metaideophone mouth, also be provided with split-flow opening from the sub-tank of supercharging, from boost port and refluxing opening, described pipe-line system comprises filling pipeline, upper metaideophone pipeline, pressure pipeline, blowdown piping, shunt conduit, reflux line, survey full packages road, safety attachment pipeline, TT&C system pipeline and interlayer pressurize pipeline.
Described safety attachment is divided into sub-tank safety protection device, female tank pressure relief device and interlayer protective gear, sub-tank safety protection device is provided to respectively on five sub-tanks, after being drawn by sub-upper end, end by three-way valve by safety valve and rupture disk parallel connection; Described female tank pressure relief device comprises outer tank bleeder and inhalation valve; Described interlayer protective gear, introduces interlayer by external source nitrogen, is equipped with pressure regulator valve on pipeline, nitrogen bypass valve in parallel, and pressure regulator valve front end and back end is equipped with pressure gauge, and pressure regulator valve rear end has also been equipped with pressure transducer and ANALYZER.
Described Sandwich filling pearlife, fills dry nitrogen, adopts Self-driven pressure-adjusting valve control interlayer pressure, and interlayer working pressure is 0.001Mpa.
Described female tank is flat ledge structure, and top is provided with pressure relief device mouth, and pearlife is filled mouthful, and bottom is provided with pearlife exhaust port, and top and side arrange population, and outside is provided with and leads electrostatic grounding and lightning protection facility, inside is provided with fire-fighting spraying pipeline.
Described peripheral operation platform is equipped with winding stair to top.
Described TT&C system, comprise measurement Displaying Meter and teletransmission measurement and control instrument to pressure, liquid level and temperature, draw respectively pressure-liquid level measurement in a closed series instrument assembly in five sub-upper end and bottom, five points for measuring temperature are set in the bottom of female tank, top arranges five points for measuring temperature, upper, middle and lower portion at every sub-tank arranges point for measuring temperature, and serviceability temperature sensor is measured.
Described filler is arranged on five sub-pot bottoms and is connected with filling pipeline; Described upper metaideophone mouth is arranged on five sub-tank tops, metaideophone pipeline in connection; Described relief opening is arranged on the top of five sub-tanks, is connected to discharge main pipeline; Described boost port is divided into from boost port and outer boost port, and described is respectively being provided with one from boost port from the sub-pot bottom of supercharging and top, connects and imports and exports from boosting vaporizer; Outer boost port is arranged on five sub-tank tops, is connected to external source nitrogen, and antithetical phrase tank carries out supercharging; Described split-flow opening is arranged on from the sub-pot bottom of supercharging, is connected to filling subtube; Described refluxing opening, by drawing from the sub-tank top of supercharging, connects discharge main pipeline, and the raffinate in exhaust process is back in the sub-tank of supercharging; Described survey is profusely arranged on five the highest liquid level of sub-tank places.
The beneficial effects of the utility model are:
The utility model is for reducing floor space, and sub-tank adopts vertical type cylinder form, and sub-tank design is with pressure, has realized storage with pressure, has reduced the requirement to thermoinsulation material and environment, reduces costs.
The adiabatic form of liquid nitrogen combination container, for filling pearlife malleation pressurize thermal insulation, is filled dry nitrogen after interlayer vacuum-pumping, be so provided with nitrogen protection device, ensures that interlayer is in micro positive pressure operating mode, prevents moisture intrusion.Nitrogen can enter interlayer by modulating valve, and modulating valve can ensure the stable of interlayer pressure, and in the time that modulating valve overhauls, nitrogen can enter interlayer by bypath valve.Outer tank top arranges pearlife and fills mouth, and bottom is provided with pearlife exhaust port, is convenient to pearlife and fills, discharges.Top and side arrange manhole, easy access.Female tank is provided with leads electrostatic grounding and lightning protection facility, and interface fire-fighting spraying pipeline, to ensure the Security of its use
When group tank internal pressure raises, can BOG be bled off by discharge main valve, also can be stable by regulating main valve to maintain sub-pressure tank; On every sub-tank gas phase pipeline, a safety valve and blasting piece device are set; and before safety valve and blasting piece device, three-way switch valve is installed; ensureing under any circumstance, all has 1 safety installations in working state, plays double protection to guarantee combination container security of operation.For female tank, it is provided with bleeder and inhalation valve, increases in order to prevent that interlayer pressure is anxious.
Female tank is flat ledge structure, is installed on basic platform, and basic platform and female tank top setting operation platform, arrange winding stair therebetween, is convenient to centralized operation, easy for going up and down, light.
All liquid phases are drawn exterior sheath conduit and are all adopted vacuum heat-insulated pipe to contain pump reflux pipe, and filling is mouth, a filling point mouthful employing socket joint heat insulating construction always, and weld adopts little vacuum insulation structure, the vacuum insulation of guarantee low temperature fluid pipeline.Sub-tank pipeline adopts U-shaped expansion joint structure, adopts insulation casing with female tank joint, and outlet conduit adopts corrugated expansion joint, reduces to greatest extent cold damage.
Be provided with diverter valve and filling point valve from the sub-tank of supercharging, can carry out low flow rate filling and use separately.Five sub-tanks total pipeline of also can annotating uses jointly, carries out large flow rate filling, has realized the integral type control of the filling consumption different phase of liquid nitrogen, has avoided large-scale low-temperature container to carry out small flow uppity shortcoming of difficult operation while jointly annotating.After sub-tank exhaust, after pump, reflux valve flow to 1# tank, is convenient to focusing on a small amount of withdrawing fluid.
Combination container is provided with top feed liquor and two pipelines of bottom liquid inlet.Top feed liquor pipeline adopts spray equipment, evenly cooling to ensure inner canister, avoids local temperature difference stress excessive, and possesses independent metaideophone ability respectively.
The pressure of sub-tank and liquid level can be by pressure gauge and level meter readings on the spot, also can be by the signal is far passed to central control chamber.The pressure transmitter band on the spot pressure in Presentation Function interlayer can lead to pressure gauge reading on the spot, also can monitor at central control chamber.Survey is set profusely, can in the time of topping up, plays and overflow double protection.Five points for measuring temperature are set in the bottom of female tank, top arranges five points for measuring temperature, upper, middle and lower portion at every sub-tank arranges point for measuring temperature, so measuring point is set to data analysis, can accomplish the digitizing and integrated of monitoring by teletransmission to central control chamber, become convenient thereby make to control in real time primary and secondary tank working state.
The utility model primary and secondary pot type combination container can be realized metaideophone, supercharging, pressure release and the process of monitoring in real time, is the storage supply equipment of desirable large-scale liquid nitrogen.The utility model is for liquid nitrogen storage supply container, thereby employing pressure extrusion way does not need exterior liquid, infusion pump discharge opeing is easy and simple to handle, reliability is high, storage with pressure reduces emission loss in storage period, manufacture to install and more easily realize compared with spherical tank, manufacture installation cost is low, has higher Security, stability, controllability.
Brief description of the drawings
Fig. 1 is the utility model primary and secondary pot type liquid nitrogen combination container structural representation;
Fig. 2 is the utility model technological principle schematic diagram;
Fig. 3 is five sub-tank orientation of the utility model and female tank external valve group linkage structure schematic diagram.
Fig. 4 is the utility model workflow diagram.
Embodiment
As Figure 1-3, the utility model primary and secondary pot type combination container includes sub-tank, pipe-line system, interlayer, female tank 3, TT&C system, safety attachment and peripheral operation platform 8.Paint spraying is carried out in liquid nitrogen combination container outside, is installed on basic platform 9.Five described sub-tanks are respectively one to be arranged from the sub-tank 1 of supercharging and the concentric regular polygon of 2, five sub-tanks of four common sub-tanks, and pipe-line system is arranged in the location at five sub-Guan Zhimuguan centers.Female tank interior conduit carries out sub-clustering installation, goes out to carry out similar set after female tank and form metaideophone valve group 300, pressure charging valve group 400, escape cock group 100 and fill valve group 200.
Described pipe-line system comprises filling pipeline, upper metaideophone pipeline, and pressure pipeline, blowdown piping, shunt conduit, reflux line, surveys full packages road, safety attachment pipeline, TT&C system pipeline and interlayer pressurize pipeline.
Totally five, described sub-tank, being respectively one is concentric regular polygon proper alignment from the sub-tank 1 of supercharging and 2, five sub-tank arrangements of four common sub-tanks, and every sub-jar structure is vertical type cylinder shape, sub-pot bottom is that supporting leg supports, and main material is 06Cr19Ni10 stainless steel.Be 0.8Mpa from sub-tank 1 design pressure of supercharging, four common sub-tank 2 design pressures are 0.4Mpa.
Every sub-tank all possesses a filler, a relief opening, an outer boost port and a upper metaideophone mouth.
Except having the above-mentioned mouth of pipe, also there is a split-flow opening, one from boost port and a refluxing opening from the sub-tank 1 of supercharging, can carry out from supercharging and low flow rate filling.Also be equipped with automatic pressure intensifier from the sub-tank 1 of supercharging, possess independent use ability.
Described filler is arranged on five sub-pot bottoms, be connected to filling pipeline, after converging to the main pipeline of annotating, the main pipeline of then annotating is drawn lower metaideophone pipeline, on lower metaideophone pipeline, be equipped with lower metaideophone main valve 501, filling main pipeline front end is equipped with safety valve 201, and end is equipped with filling main valve 202, on sub-tank filling branch pipe(tube), is equipped with respectively fill valve 203.Both can, by filler to sub-pot bottom filling liquid nitrogen, also can outwards provide liquid nitrogen from filler thus.
Described upper metaideophone mouth is arranged on five sub-tank tops, and metaideophone pipeline in connection, is connected to metaideophone main pipeline after converging, and then goes up metaideophone main pipeline and draws metaideophone pipeline for subsequent use, and upper metaideophone main pipeline and lower metaideophone pipeline merge into metaideophone main pipeline.Metaideophone pipeline for subsequent use is equipped with equilibrium valve 304, metaideophone is steadily carried out, be equipped with respectively metaideophone valve 301 on sub-tank on metaideophone branch pipe(tube), upper metaideophone main pipeline is equipped with upper metaideophone main valve 302, metaideophone main pipeline is equipped with residual liquid discharge valve 303, and raffinate in pipeline is discharged in time.Can pass through upper and lower metaideophone mouth from the liquid nitrogen of road tanker thus, enter sub-tank and carry out independent metaideophone or parallel metaideophone.And also can be by upper metaideophone mouth as the liquid nitrogen in the tank of reserve liquid nitrogen source, enter sub-upper end and carry out metaideophone.Upper metaideophone mouth top feed liquor pipeline adopts spray equipment.
Described relief opening is arranged on the top of five sub-tanks, is connected to blowdown piping, after converging to discharging main pipeline.Sub-tank bleeder is equipped with respectively escape cock 103 on road, and discharge main pipeline end passes through 101 exhausts of discharge main valve, or is connected to adjusting branch pipe(tube) by regulating main valve 102 to discharge.Thus, can, according to working state, control discharge amount size.
Described boost port comprises from boost port and outer boost port.
Described is respectively being provided with one from boost port from supercharging sub-tank 1 bottom and top, connects and imports and exports from boosting vaporizer 3, carries out from supercharging thus.
Described outer boost port is arranged on five sub-tank tops, be connected at pressure pipeline, after converging to supercharging main pipeline.On sub-tank supercharging branch pipe(tube), be equipped with respectively pressure charging valve 402, supercharging main pipeline end is connected to external source nitrogen by supercharging main valve 401, and antithetical phrase tank carries out supercharging.
Described split-flow opening is arranged on from the sub-tank of supercharging 1 bottom, is connected to filling subtube, carries out low flow rate filling use, on filling subtube, is equipped with diverter valve 701.
Described refluxing opening, by from sub-tank 1 Base top contact of supercharging, by reflux valve after pump 104, connects discharge main pipeline, and the raffinate in exhaust process is back in the sub-tank 1 of supercharging.
Also be provided with survey profusely at five the highest liquid level of sub-tank places, survey to be profusely connected to and survey full valve 601, rush liquid and whether reach the highest predetermined liquid level place in order to measure sub-tank.
All liquid phases are drawn exterior sheath conduit and are all adopted vacuum heat-insulated pipe to contain pump reflux pipe, filling is mouth, a filling point mouthful employing socket joint heat insulating construction always, weld adopts little vacuum insulation structure, sub-tank pipeline adopts U-shaped expansion joint structure, adopt insulation casing with female tank joint, outlet conduit adopts corrugated expansion joint.
Described safety attachment is divided into sub-tank safety protection device, female tank pressure relief device and interlayer protective gear.
Described sub-tank safety protection device is provided to respectively on five sub-tanks, and after being drawn by sub-upper end, end passes through three-way valve 801 by safety valve 802 and rupture disk 803 parallel connections.
Described female tank pressure relief device comprises outer tank bleeder and inhalation valve.
Described interlayer protective gear, introduces interlayer by external source nitrogen, is equipped with pressure regulator valve 901 on pipeline, nitrogen bypass valve 903 in parallel, and pressure regulator valve front end and back end is equipped with pressure gauge, and pressure regulator valve rear end has also been equipped with pressure transducer and ANALYZER.
Described Sandwich filling pearlife, fills dry nitrogen, adopts Self-driven pressure-adjusting valve control interlayer pressure, and interlayer working pressure is 0.001Mpa.
As shown in Figure 1, described female tank 3 is flat ledge structure, and material is Q345R.Its top is provided with pressure relief device mouth, and pearlife is filled mouthful, and bottom is provided with pearlife exhaust port, and top and side arrange population, and outside is provided with and leads electrostatic grounding and lightning protection facility, inside is provided with fire-fighting spraying pipeline.
Described peripheral operation platform 8 is equipped with winding stair to top, and ladder landing platform material is Q235-A.
Described TT&C system, comprises measurement Displaying Meter and teletransmission measurement and control instrument to pressure, liquid level and temperature.Draw respectively pressure-liquid level measurement in a closed series instrument assembly in five sub-upper end and low side.5 points for measuring temperature are set in the bottom of female tank, and top arranges 5 points for measuring temperature, in the upper, middle and lower portion of every sub-tank, point for measuring temperature is set, and serviceability temperature sensor is measured.
As shown in Figure 4: when large flow rate filling, the supercharging of extraneous source nitrogen antithetical phrase tank gas-phase space, while reaching the required pressure of filling, enter filling process, when liquid is constantly consumed to preset liquid level, start metaideophone process, now can select upper and lower metaideophone simultaneously or branch's unlatching, in the whole process of this feed liquor and discharge opeing, for preventing boost pressure excessive.Exhaust process starts, and emptying is carried out in exhaust on the one hand, and in exhaust, raffinate refluxes on the other hand.When low flow rate filling, principle is identical, and difference is that extraneous source nitrogen changes into from boosting vaporizer and from the sub-tank formation of supercharging circulation, and in sub-tank, liquid nitrogen antithetical phrase tank after vaporizer vaporization carries out supercharging.
Claims (7)
1. primary and secondary pot type liquid nitrogen combination container, it is characterized in that: include one from the sub-tank of supercharging, four common sub-tanks, pipe-line system, interlayer, female tank, TT&C system, safety attachment and peripheral operation platform, liquid nitrogen combination container is installed on basic platform, five concentric regular polygons of sub-tank are arranged, pipe-line system is arranged in the location at five sub-Guan Zhimuguan centers, five sub-jar structures are vertical type cylinder shape, sub-pot bottom is that supporting leg supports, five sub-tanks are provided with filler, relief opening, outer boost port and upper metaideophone mouth, also be provided with split-flow opening from the sub-tank of supercharging, from boost port and refluxing opening, described pipe-line system comprises filling pipeline, upper metaideophone pipeline, pressure pipeline, blowdown piping, shunt conduit, reflux line, survey full packages road, safety attachment pipeline, TT&C system pipeline and interlayer pressurize pipeline.
2. primary and secondary pot type liquid nitrogen combination container according to claim 1, it is characterized in that: described safety attachment is divided into sub-tank safety protection device, female tank pressure relief device and interlayer protective gear, sub-tank safety protection device is provided to respectively on five sub-tanks, after being drawn by sub-upper end, end by three-way valve by safety valve and rupture disk parallel connection; Described female tank pressure relief device comprises outer tank bleeder and inhalation valve; Described interlayer protective gear, introduces interlayer by external source nitrogen, is equipped with pressure regulator valve on pipeline, nitrogen bypass valve in parallel, and pressure regulator valve front end and back end is equipped with pressure gauge, and pressure regulator valve rear end has also been equipped with pressure transducer and ANALYZER.
3. primary and secondary pot type liquid nitrogen combination container according to claim 1, is characterized in that: described Sandwich filling pearlife, fill dry nitrogen, and adopt Self-driven pressure-adjusting valve control interlayer pressure, interlayer working pressure is 0.001Mpa.
4. primary and secondary pot type liquid nitrogen combination container according to claim 1, it is characterized in that: described female tank is flat ledge structure, top is provided with pressure relief device mouth, pearlife is filled mouth, bottom is provided with pearlife exhaust port, top and side arrange population, and outside is provided with and leads electrostatic grounding and lightning protection facility, inside is provided with fire-fighting spraying pipeline.
5. primary and secondary pot type liquid nitrogen combination container according to claim 1, is characterized in that: described peripheral operation platform is equipped with winding stair to top.
6. primary and secondary pot type liquid nitrogen combination container according to claim 1, it is characterized in that: described TT&C system, comprise measurement Displaying Meter and teletransmission measurement and control instrument to pressure, liquid level and temperature, draw respectively pressure-liquid level measurement in a closed series instrument assembly in five sub-upper end and bottom, five points for measuring temperature are set in the bottom of female tank, top arranges five points for measuring temperature, in the upper, middle and lower portion of every sub-tank, point for measuring temperature is set, and serviceability temperature sensor is measured.
7. primary and secondary pot type liquid nitrogen combination container according to claim 1, is characterized in that: described filler is arranged on five sub-pot bottoms and is connected with filling pipeline; Described upper metaideophone mouth is arranged on five sub-tank tops, metaideophone pipeline in connection; Described relief opening is arranged on the top of five sub-tanks, is connected to discharge main pipeline; Described boost port is divided into from boost port and outer boost port, and described is respectively being provided with one from boost port from the sub-pot bottom of supercharging and top, connects and imports and exports from boosting vaporizer; Outer boost port is arranged on five sub-tank tops, is connected to external source nitrogen, and antithetical phrase tank carries out supercharging; Described split-flow opening is arranged on from the sub-pot bottom of supercharging, is connected to filling subtube; Described refluxing opening, by drawing from the sub-tank top of supercharging, connects discharge main pipeline, and the raffinate in exhaust process is back in the sub-tank of supercharging; Described survey is profusely arranged on five the highest liquid level of sub-tank places.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420074758.5U CN203810028U (en) | 2014-02-21 | 2014-02-21 | Main-sub pot-type combined container for liquid nitrogen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420074758.5U CN203810028U (en) | 2014-02-21 | 2014-02-21 | Main-sub pot-type combined container for liquid nitrogen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203810028U true CN203810028U (en) | 2014-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420074758.5U Expired - Fee Related CN203810028U (en) | 2014-02-21 | 2014-02-21 | Main-sub pot-type combined container for liquid nitrogen |
Country Status (1)
| Country | Link |
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| CN (1) | CN203810028U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759136A (en) * | 2014-02-21 | 2014-04-30 | 沈阳航天新光集团有限公司 | Main-sub pot-type combined container for liquid nitrogen |
| CN110792925A (en) * | 2019-11-15 | 2020-02-14 | 辽宁忠旺集团有限公司 | Self-pressurization gas supply system and gas supply method |
-
2014
- 2014-02-21 CN CN201420074758.5U patent/CN203810028U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759136A (en) * | 2014-02-21 | 2014-04-30 | 沈阳航天新光集团有限公司 | Main-sub pot-type combined container for liquid nitrogen |
| CN103759136B (en) * | 2014-02-21 | 2016-01-20 | 沈阳航天新光集团有限公司 | Primary and secondary pot type liquid nitrogen combination container |
| CN110792925A (en) * | 2019-11-15 | 2020-02-14 | 辽宁忠旺集团有限公司 | Self-pressurization gas supply system and gas supply method |
| CN110792925B (en) * | 2019-11-15 | 2022-01-28 | 辽宁忠旺集团有限公司 | Self-pressurization gas supply system and gas supply method |
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| 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140903 Termination date: 20160221 |