CN115654357A - Hypersonic high-temperature wind tunnel high-pressure liquid oxygen storage tank with liquid nitrogen jacket and use method thereof - Google Patents
Hypersonic high-temperature wind tunnel high-pressure liquid oxygen storage tank with liquid nitrogen jacket and use method thereof Download PDFInfo
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- CN115654357A CN115654357A CN202211568144.8A CN202211568144A CN115654357A CN 115654357 A CN115654357 A CN 115654357A CN 202211568144 A CN202211568144 A CN 202211568144A CN 115654357 A CN115654357 A CN 115654357A
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 393
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 title claims abstract description 227
- 239000007788 liquid Substances 0.000 title claims abstract description 207
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 196
- 238000003860 storage Methods 0.000 title claims abstract description 172
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000012360 testing method Methods 0.000 claims abstract description 55
- 235000015107 ale Nutrition 0.000 claims abstract description 4
- 238000010926 purge Methods 0.000 claims description 21
- 238000001125 extrusion Methods 0.000 claims description 20
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 13
- 238000007599 discharging Methods 0.000 claims description 13
- 239000001301 oxygen Substances 0.000 claims description 13
- 229910052760 oxygen Inorganic materials 0.000 claims description 13
- 238000005070 sampling Methods 0.000 claims description 8
- 239000007791 liquid phase Substances 0.000 claims description 7
- 239000012071 phase Substances 0.000 claims description 7
- 238000004321 preservation Methods 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 6
- 241000134884 Ericales Species 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 238000009835 boiling Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 230000008016 vaporization Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 229910001873 dinitrogen Inorganic materials 0.000 claims 1
- 230000008676 import Effects 0.000 claims 1
- 238000009413 insulation Methods 0.000 abstract description 6
- 239000010410 layer Substances 0.000 description 8
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 241000256111 Aedes <genus> Species 0.000 description 1
- 241001116389 Aloe Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 235000011399 aloe vera Nutrition 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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Abstract
The invention belongs to the technical field of ultra-high speed wind tunnel tests, and particularly relates to a hypersonic high-temperature wind tunnel high-pressure liquid oxygen storage tank with a liquid nitrogen jacket and a use method thereof. The high-pressure liquid oxygen storage tank comprises a liquid oxygen storage tank inner container which is vertically arranged, the middle section of the liquid oxygen storage tank inner container is a cylinder, the upper end and the lower end of the liquid oxygen storage tank inner container are welded and connected with an arched end socket, and a liquid nitrogen jacket is sleeved on the cylinder; the inner container of the liquid oxygen storage tank is also connected with a matched valve and a matched instrument; an Ales heat-insulating layer is integrally wrapped outside the inner container of the liquid oxygen storage tank and the liquid nitrogen jacket for heat insulation. The upper side and the lower side of the diagonal of the liquid nitrogen jacket are respectively provided with a liquid nitrogen jacket outlet and a liquid nitrogen jacket inlet, liquid nitrogen flows in from the lower side inlet and flows out from the upper side outlet during precooling, and the purity of liquid oxygen in the container in the liquid oxygen storage tank is not influenced during precooling. The application method can meet the requirement of liquid oxygen supply of the hypersonic high-temperature wind tunnel, stably and safely stores and supplies high-pressure liquid oxygen in a short time during a wind tunnel test, and ensures the test safety.
Description
Technical Field
The invention belongs to the technical field of ultra-high speed wind tunnel tests, and particularly relates to a hypersonic speed high-temperature wind tunnel high-pressure liquid oxygen storage tank with a liquid nitrogen jacket and a use method thereof.
Background
The liquid oxygen storage tank is the storage facilities of liquid oxygen, belongs to one kind of low temperature storage tank for fields such as liquid oxygen production, storage and transportation, the size that liquid oxygen storage tank commonly used on the market has: 5m 3 、10m 3 、15m 3 、20m 3 、30m 3 、50m 3 、100m 3 The device has the characteristics of long service life, compact structure, small occupied area, centralized control, convenient operation and the like, and is widely applied to various industries of national economic activities such as industry, agriculture, national defense, scientific research and the like.
The conventional low-temperature liquid oxygen storage tank is a double-layer fixed vacuum powder heat insulation storage tank, the inner container is made of stainless steel, the outer container is made of Q235B or 16MnR, the surface anticorrosive coating adopts the processes of sand blasting, rust removal, blowing, spraying and the like, and meanwhile, the double-component fast curing liquid coating is adopted, so that the low-temperature liquid oxygen storage tank has a good heat insulation effect.
At present, the liquid oxygen storage tank is insulated and insulated in a vacuum interlayer mode, and the storage pressure is low. However, the high-pressure liquid oxygen storage tank for the wind tunnel test has the characteristics of high pressure requirement, short medium storage time and low heat insulation requirement, and the conventional liquid oxygen storage tank has the following problems of inapplicability to the wind tunnel test:
a. the test pressure is high;
the maximum working pressure of a conventional liquid oxygen storage tank is 2.2MPa, the high-pressure liquid oxygen storage tank for the wind tunnel test needs to utilize high-pressure nitrogen to pressurize liquid oxygen in the high-pressure liquid oxygen storage tank during the test, the maximum working pressure reaches 30MPa and is limited by the pressurization of the liquid oxygen, and the high-pressure liquid oxygen storage tank for the wind tunnel test has higher requirement on pressure.
b. Precooling a high-pressure liquid oxygen storage tank;
in order to achieve the temperature condition for storing the liquid oxygen, the liquid oxygen storage tank is pre-cooled before storage, and the pre-cooled liquid oxygen is usually directly discharged to the atmosphere. For a high-pressure liquid oxygen storage tank for a wind tunnel test, if precooled liquid oxygen is directly discharged to the atmosphere, oxygen cannot be diffused in the high altitude, local oxygen concentration is too high, once open fire occurs, fire and explosion risks exist, and serious safety threats are caused to workers.
c. The storage time is short;
compared with a conventional liquid oxygen storage tank, the high-pressure liquid oxygen storage tank for the hypersonic-speed high-temperature wind tunnel has the advantages that the time for storing the medium is relatively short, the requirement on heat insulation and heat preservation is relatively low, the cost for performing heat insulation by adopting a vacuum interlayer is high, and the economical efficiency is poor.
At present, the development of a hypersonic speed high-temperature wind tunnel high-pressure liquid oxygen storage tank with a liquid nitrogen jacket and a use method thereof are urgently needed.
Disclosure of Invention
The invention aims to solve a technical problem of providing a hypersonic speed high-temperature wind tunnel high-pressure liquid oxygen storage tank with a liquid nitrogen jacket, and the invention also aims to solve a technical problem of providing a use method of the hypersonic speed high-temperature wind tunnel high-pressure liquid oxygen storage tank with the liquid nitrogen jacket.
The hypersonic high-temperature wind tunnel high-pressure liquid oxygen storage tank with the liquid nitrogen jacket is characterized by comprising a liquid oxygen storage tank inner container which is vertically arranged, wherein the middle section of the liquid oxygen storage tank inner container is a cylinder, and a liquid nitrogen jacket compensator is arranged on the liquid nitrogen jacket; the upper end and the lower end of an inner container of the liquid oxygen storage tank are respectively welded with an arched end socket;
an arched end socket at the upper end of an inner container of the liquid oxygen storage tank is connected with a guided wave radar liquid level meter interface, a nitrogen extrusion port, a safety valve assembly and a gas phase pressure sampling pipe; the interface of the guided wave radar liquid level meter is connected with the guided wave radar liquid level meter; the nitrogen extrusion port is connected with a first port of the tee joint, a second port of the tee joint is connected with the nitrogen pressurization valve, and a third port of the tee joint is connected with the nitrogen pressure relief valve; the safety valve assembly comprises a pressure gauge and a safety valve;
the bottom of an arched end socket at the lower end of an inner container of the liquid oxygen storage tank is connected with a liquid oxygen supply port and a liquid phase pressure sampling pipe; a patch type temperature sensor is arranged on the pipeline connected with the liquid oxygen supply port;
a gas phase pressure taking pipe at the upper end of the inner container of the liquid oxygen storage tank and a liquid phase pressure taking pipe at the lower end of the inner container of the liquid oxygen storage tank are respectively connected with corresponding differential pressure type liquid level meter interfaces, and the differential pressure type liquid level meter interfaces are connected with a differential pressure type liquid level meter;
the guided wave radar liquid level meter and the differential pressure type liquid level meter measure the liquid oxygen liquid level of the inner container of the liquid oxygen storage tank;
the upper section of the liquid nitrogen jacket is provided with a liquid nitrogen jacket outlet which is connected with a low-temperature stop valve of the liquid nitrogen jacket outlet through a pipeline; the lower section of the liquid nitrogen jacket is provided with a liquid nitrogen jacket inlet positioned at the opposite angle of the liquid nitrogen jacket outlet, and the liquid nitrogen jacket inlet is connected with a liquid nitrogen jacket inlet low-temperature stop valve through a pipeline;
an Ales heat-insulating layer is integrally wrapped outside the liquid oxygen storage tank inner container and liquid nitrogen jacket assembly; the interface of the guided wave radar liquid level meter, the interface of the nitrogen extrusion port and the interface of the differential pressure type liquid level meter extend out of the Ales heat preservation layer, and the low-temperature stop valve at the outlet of the liquid nitrogen jacket, the valve of the safety valve assembly and the low-temperature stop valve at the inlet of the liquid nitrogen jacket extend out of the Ales heat preservation layer.
Furthermore, the material of the inner container of the liquid oxygen storage tank and the liquid nitrogen jacket is S30408 stainless steel.
Furthermore, the liquid nitrogen jacket compensator is a pipeline with a corrugated pipe structure, is fixed at the middle section of the liquid nitrogen jacket in a welding mode, and stretches up and down along the vertical direction in the use process of the high-temperature wind tunnel high-pressure liquid oxygen storage tank, so as to compensate the length tensile deformation of the liquid nitrogen jacket and reduce the stress.
The invention discloses a using method of a hypersonic high-temperature wind tunnel high-pressure liquid oxygen storage tank with a liquid nitrogen jacket, which comprises the following steps:
s10, purging an inner container and a liquid nitrogen jacket of the liquid oxygen storage tank before the test;
before the test, synchronously purging an inner container and a liquid nitrogen jacket of the liquid oxygen storage tank; introducing nitrogen from the nitrogen extrusion port, discharging from the liquid oxygen supply port, and purging the inner container of the liquid oxygen storage tank; introducing nitrogen from an inlet of the liquid nitrogen jacket, discharging the nitrogen from an outlet of the liquid nitrogen jacket, and purging the liquid nitrogen jacket; after the purging is finished, impurities and residual liquid do not exist in the inner container of the liquid oxygen storage tank and the liquid nitrogen jacket;
s20, an inner container of the precooling liquid oxygen storage tank;
precooling an inner container of the liquid oxygen storage tank by a liquid nitrogen jacket; opening a liquid nitrogen jacket inlet low-temperature stop valve and a liquid nitrogen jacket outlet low-temperature stop valve, introducing liquid nitrogen from a liquid nitrogen jacket inlet, pre-cooling an inner container of the liquid oxygen storage tank, and discharging nitrogen from a liquid nitrogen jacket outlet to atmosphere for emptying; in the precooling process, the temperature of the container in the liquid oxygen storage tank is monitored by the patch type temperature sensor in real time, and when the container in the liquid oxygen storage tank is precooled to-100 ℃, the low-temperature stop valve at the inlet of the liquid nitrogen jacket is closed; in order to prevent the liquid nitrogen in the liquid nitrogen jacket from continuously vaporizing and overpressure, the low-temperature stop valve at the outlet of the liquid nitrogen jacket is kept in an open state and continuously emptied;
s30, filling an inner container of the liquid oxygen storage tank;
liquid oxygen is introduced into the inner container of the liquid oxygen storage tank from the liquid oxygen supply port, and the gasified oxygen is discharged to the atmosphere through the pressure relief valve of the nitrogen extrusion port; continuously filling liquid oxygen into an inner container of the liquid oxygen storage tank, continuously reducing the temperature of the inner container of the liquid oxygen storage tank to the boiling point of the liquid oxygen, starting liquid accumulation in the inner container of the liquid oxygen storage tank, gradually increasing the liquid level of the liquid oxygen, and monitoring the liquid level height of the liquid oxygen in real time by a guided wave radar liquid level meter of a guided wave radar liquid level meter interface and a differential pressure type liquid level meter of a differential pressure type liquid level meter interface; stopping filling the liquid oxygen when the liquid oxygen level height meets the test conditions;
s40, pressurizing an inner container of the liquid oxygen storage tank, and carrying out a test;
before the test, a pressure increasing valve connected with a nitrogen extrusion opening is opened, high-pressure nitrogen is adopted to increase the pressure of the liquid oxygen in the container in the liquid oxygen storage tank until a pressure gauge of a safety valve assembly displays that the preset test pressure is reached; continuously pressurizing, when the pressure in the container in the liquid oxygen storage tank exceeds the preset test pressure, automatically opening a safety valve of a safety valve assembly, and discharging the mixed medium of high-pressure nitrogen and oxygen in the container in the liquid oxygen storage tank until the pressure in the container in the liquid oxygen storage tank is dynamically stabilized at the preset test pressure; carrying out a test;
s50, after the test, emptying the inner container of the liquid oxygen storage tank;
after the test is finished, closing the pressure increasing valve, releasing a mixed medium of high-pressure nitrogen and oxygen in the container in the liquid oxygen storage tank through the pressure relief valve, and discharging residual liquid oxygen in the container in the liquid oxygen storage tank into the liquid oxygen relief tank from the liquid oxygen supply port for emptying when the pressure in the container in the liquid oxygen storage tank is lower than 1.0 MPa;
s60, after the test, purging an inner container and a liquid nitrogen jacket of the liquid oxygen storage tank;
and (5) after the test, repeating the step S10, purging the inner container and the liquid nitrogen jacket of the liquid oxygen storage tank, and closing all valves after purging is finished to finish the work.
The hypersonic-velocity high-temperature wind tunnel high-pressure liquid oxygen storage tank with the liquid nitrogen jacket and the use method thereof utilize liquid nitrogen to carry out precooling, the liquid nitrogen jacket is sleeved on the inner container of the liquid oxygen storage tank, and the liquid nitrogen flows in the liquid nitrogen jacket during precooling without flowing into the inner container of the liquid oxygen storage tank, so that the purity of the liquid oxygen in the inner container of the liquid oxygen storage tank is not influenced.
Specifically, the hypersonic-speed high-temperature wind tunnel high-pressure liquid oxygen storage tank with the liquid nitrogen jacket and the use method thereof are characterized in that a liquid nitrogen jacket outlet and a liquid nitrogen jacket inlet are respectively arranged on the upper side and the lower side of the diagonal angle of the liquid nitrogen jacket, and liquid nitrogen flows in from the lower side inlet and flows out from the upper side outlet of an inner container of the liquid oxygen storage tank during precooling. The nitrogen extrusion interface is used for pressurizing and decompressing high-pressure nitrogen in the container in the liquid oxygen storage tank and discharging a mixed medium of the high-pressure nitrogen and oxygen after a test. The liquid nitrogen jacket compensator is used for adapting to the size change of a liquid nitrogen jacket generated by the temperature change of an inner container of the liquid oxygen storage tank and reducing the stress. The safety valve assembly controls the pressure of the container in the liquid oxygen storage tank not to exceed a preset test pressure, when the pressure of the container in the liquid oxygen storage tank exceeds the preset test pressure, the safety valve is automatically opened, and a mixed medium of high-pressure nitrogen and oxygen in the container in the liquid oxygen storage tank is discharged outwards, so that the overpressure of the container in the liquid oxygen storage tank is prevented. The guided wave radar liquid level meter and the differential pressure type liquid level meter are used for monitoring the liquid oxygen liquid level of the container in the liquid oxygen storage tank in real time. The pressure gauge monitors the pressure of the container in the liquid oxygen storage tank.
The hypersonic high-temperature wind tunnel high-pressure liquid oxygen storage tank with the liquid nitrogen jacket and the use method thereof can meet the requirement of hypersonic high-temperature wind tunnel liquid oxygen supply, stably and safely store and supply high-pressure liquid oxygen in a short time during a wind tunnel test, and ensure the test safety.
Drawings
FIG. 1 is a schematic structural diagram of a hypersonic high-temperature wind tunnel high-pressure liquid oxygen storage tank with a liquid nitrogen jacket according to the present invention.
In the figure, 1. A liquid oxygen supply port; 2. a patch type temperature sensor; 3. an Aedes insulating layer; 4. an inner container of the liquid oxygen storage tank; 5. a liquid nitrogen jacket; 6. an outlet of the liquid nitrogen jacket; 7. a low-temperature stop valve at the outlet of the liquid nitrogen jacket; 8. a guided wave radar level gauge interface; 9. a nitrogen extrusion port; 10. a safety valve assembly; 11. a gas-phase pressure sampling pipe; 12. a liquid nitrogen jacket compensator; 13. a liquid nitrogen jacket inlet low-temperature stop valve; 14. an inlet of a liquid nitrogen jacket; 15. a liquid phase pressure sampling pipe; 16. differential pressure type liquid level meter interface.
Detailed Description
The present invention is described in detail below with reference to the drawings and examples.
Example 1
As shown in fig. 1, the hypersonic-velocity high-temperature wind tunnel high-pressure liquid oxygen storage tank with a liquid nitrogen jacket of the present embodiment includes a liquid oxygen storage tank inner container 4 placed vertically, the middle section of the liquid oxygen storage tank inner container 4 is a cylinder, and a liquid nitrogen jacket compensator 12 is arranged on a liquid nitrogen jacket 5; the upper end and the lower end of an inner container 4 of the liquid oxygen storage tank are respectively welded with an arched end socket;
an arched end socket at the upper end of an inner container 4 of the liquid oxygen storage tank is connected with a guided wave radar liquid level meter interface 8, a nitrogen extrusion port 9, a safety valve assembly 10 and a gas phase pressure sampling pipe 11; the interface 8 of the guided wave radar liquid level meter is connected with the guided wave radar liquid level meter; the nitrogen extrusion port 9 is connected with a first port of the tee joint, a second port of the tee joint is connected with the nitrogen pressurization valve, and a third port of the tee joint is connected with the nitrogen pressure relief valve; the safety valve assembly 10 includes a pressure gauge and a safety valve;
the bottom of an arched end socket at the lower end of an inner container 4 of the liquid oxygen storage tank is connected with a liquid oxygen supply port 1 and a liquid phase pressure sampling pipe 15; a surface-mounted temperature sensor 2 is arranged on the pipeline connected with the liquid oxygen supply port 1;
a gas phase pressure taking pipe 11 at the upper end of the inner container 4 of the liquid oxygen storage tank and a liquid phase pressure taking pipe 15 at the lower end of the inner container 4 of the liquid oxygen storage tank are respectively connected with a corresponding differential pressure type liquid level meter interface 16, and the differential pressure type liquid level meter interface 16 is connected with a differential pressure type liquid level meter;
the guided wave radar liquid level meter and the differential pressure type liquid level meter measure the liquid oxygen liquid level of the container 4 in the liquid oxygen storage tank;
the upper section of the liquid nitrogen jacket 5 is provided with a liquid nitrogen jacket outlet 6, and the liquid nitrogen jacket outlet 6 is connected with a liquid nitrogen jacket outlet low-temperature stop valve 7 through a pipeline; a liquid nitrogen jacket inlet 14 which is positioned at the opposite angle of the liquid nitrogen jacket outlet 6 is arranged at the lower section of the liquid nitrogen jacket 5, and the liquid nitrogen jacket inlet 14 is connected with a liquid nitrogen jacket inlet low-temperature stop valve 13 through a pipeline;
an Aloes heat-insulating layer 3 is integrally wrapped outside the combination of the inner container 4 of the liquid oxygen storage tank and the liquid nitrogen jacket 5; the guided wave radar liquid level meter interface 8, the nitrogen extrusion port 9 and the differential pressure type liquid level meter interface 16 extend out of the Ales heat preservation layer 3, and the liquid nitrogen jacket outlet low-temperature stop valve 7, the valve of the safety valve assembly 10 and the liquid nitrogen jacket inlet low-temperature stop valve 13 extend out of the Ales heat preservation layer 3.
Furthermore, the material of the inner container 4 of the liquid oxygen storage tank and the liquid nitrogen jacket 5 is S30408 stainless steel.
Further, the liquid nitrogen jacket compensator 12 is a pipeline of a bellows structure, is fixed at the middle section of the liquid nitrogen jacket 5 in a welding manner, and extends up and down along the vertical direction in the use process of the high-temperature wind tunnel high-pressure liquid oxygen storage tank, so as to compensate the length tensile deformation of the liquid nitrogen jacket 5 and reduce the stress.
The use method of the hypersonic speed high temperature wind tunnel high pressure liquid oxygen storage tank with the liquid nitrogen jacket comprises the following steps:
s10, purging an inner container 4 and a liquid nitrogen jacket 5 of the liquid oxygen storage tank before testing;
before the test, synchronously purging an inner container 4 of the liquid oxygen storage tank and a liquid nitrogen jacket 5; introducing nitrogen from the nitrogen extrusion port 9, discharging from the liquid oxygen supply port 1, and purging the inner container 4 of the liquid oxygen storage tank; nitrogen is introduced from a liquid nitrogen jacket inlet 14 and is discharged from a liquid nitrogen jacket outlet 6, and the liquid nitrogen jacket 5 is purged; after the purging is finished, impurities and residual liquid do not exist in the inner container 4 of the liquid oxygen storage tank and the liquid nitrogen jacket 5;
s20, an inner container 4 of the precooled liquid oxygen storage tank;
precooling an inner container 4 of the liquid oxygen storage tank through a liquid nitrogen jacket 5; opening a liquid nitrogen jacket inlet low-temperature stop valve 13 and a liquid nitrogen jacket outlet low-temperature stop valve 7, introducing liquid nitrogen from a liquid nitrogen jacket inlet 14, precooling an inner container 4 of the liquid oxygen storage tank, and then discharging nitrogen from a liquid nitrogen jacket outlet 6 to atmosphere for emptying; in the precooling process, the temperature of the container 4 in the liquid oxygen storage tank is monitored by the patch type temperature sensor 2 in real time, and the liquid nitrogen jacket inlet low-temperature stop valve 13 is closed after the container 4 in the liquid oxygen storage tank is precooled to-100 ℃; in order to prevent the liquid nitrogen in the liquid nitrogen jacket 5 from continuously vaporizing and overpressure, the low-temperature stop valve 7 at the outlet of the liquid nitrogen jacket is kept in an open state and continuously emptied;
s30, filling an inner container 4 of the liquid oxygen storage tank;
liquid oxygen is introduced into the container 4 in the liquid oxygen storage tank from the liquid oxygen supply port 1, and the gasified oxygen is discharged to the atmosphere through a pressure relief valve of the nitrogen extrusion port 9; continuously filling liquid oxygen into a container 4 in the liquid oxygen storage tank, continuously reducing the temperature of the container 4 in the liquid oxygen storage tank to the boiling point of the liquid oxygen, beginning to accumulate liquid in the container 4 in the liquid oxygen storage tank, gradually increasing the liquid level of the liquid oxygen, and monitoring the liquid level height of the liquid oxygen in real time by a guided wave radar liquid level meter of a guided wave radar liquid level meter interface 8 and a differential pressure type liquid level meter of a differential pressure type liquid level meter interface 16; stopping filling the liquid oxygen when the liquid oxygen level height meets the test conditions;
s40, pressurizing an inner container 4 of the liquid oxygen storage tank, and carrying out a test;
before the test, a pressure increasing valve connected with the nitrogen extrusion port 9 is opened, and high-pressure nitrogen is adopted to increase the pressure of the liquid oxygen in the container 4 in the liquid oxygen storage tank until a pressure gauge of the safety valve assembly 10 displays that the preset test pressure is reached; continuously pressurizing, when the pressure of the container 4 in the liquid oxygen storage tank exceeds the preset test pressure, automatically opening a safety valve of a safety valve assembly 10, and discharging a mixed medium of high-pressure nitrogen and oxygen in the container 4 in the liquid oxygen storage tank until the pressure of the container 4 in the liquid oxygen storage tank is dynamically stabilized at the preset test pressure; carrying out a test;
s50, after the test, emptying the inner container 4 of the liquid oxygen storage tank;
after the test is finished, closing the pressurization valve, releasing the mixed medium of high-pressure nitrogen and oxygen in the container 4 in the liquid oxygen storage tank through the pressure relief valve, and discharging the residual liquid oxygen in the container 4 in the liquid oxygen storage tank into the liquid oxygen relief tank from the liquid oxygen supply port 1 for emptying when the pressure of the container 4 in the liquid oxygen storage tank is lower than 1.0 MPa;
s60, after the test, purging an inner container 4 and a liquid nitrogen jacket 5 of the liquid oxygen storage tank;
and after the test, repeating the step S10, purging the inner container 4 and the liquid nitrogen jacket 5 of the liquid oxygen storage tank, and closing all valves after purging is finished to finish the work.
While embodiments of the invention have been disclosed above, it is not intended to be limited to the details shown, particular embodiments, or uses thereof, and it will be apparent to those skilled in the art that all of the features of the invention disclosed, or all of the steps of any method or process disclosed, except mutually exclusive features and/or steps, may be combined in any way without departing from the principles of the invention, and that the invention is not limited to the specific details and illustrations set forth herein.
Claims (4)
1. The hypersonic high-temperature wind tunnel high-pressure liquid oxygen storage tank with the liquid nitrogen jacket is characterized in that the high-temperature wind tunnel high-pressure liquid oxygen storage tank comprises a liquid oxygen storage tank inner container (4) which is vertically arranged, the middle section of the liquid oxygen storage tank inner container (4) is a cylinder, and a liquid nitrogen jacket compensator (12) is arranged on the liquid nitrogen jacket (5); the upper end and the lower end of an inner container (4) of the liquid oxygen storage tank are respectively welded and connected with an arched end socket;
an arched end socket at the upper end of an inner container (4) of the liquid oxygen storage tank is connected with a guided wave radar liquid level meter interface (8), a nitrogen extrusion port (9), a safety valve assembly (10) and a gas phase pressure sampling pipe (11); the guided wave radar liquid level meter interface (8) is connected with the guided wave radar liquid level meter; the nitrogen extrusion port (9) is connected with a first port of the tee joint, a second port of the tee joint is connected with a nitrogen pressurization valve, and a third port of the tee joint is connected with a nitrogen pressure relief valve; the safety valve assembly (10) comprises a pressure gauge and a safety valve;
the bottom of an arched end socket at the lower end of an inner container (4) of the liquid oxygen storage tank is connected with a liquid oxygen supply port (1) and a liquid phase pressure sampling pipe (15); a patch type temperature sensor (2) is arranged on the pipeline connected with the liquid oxygen supply port (1);
a gas phase pressure taking pipe (11) at the upper end of the inner container (4) of the liquid oxygen storage tank and a liquid phase pressure taking pipe (15) at the lower end of the inner container (4) of the liquid oxygen storage tank are respectively connected with a corresponding differential pressure type liquid level meter interface (16), and the differential pressure type liquid level meter interface (16) is connected with a differential pressure type liquid level meter;
the liquid oxygen level of an inner container (4) of the liquid oxygen storage tank is measured by a guided wave radar liquid level meter and a differential pressure type liquid level meter;
the upper section of the liquid nitrogen jacket (5) is provided with a liquid nitrogen jacket outlet (6), and the liquid nitrogen jacket outlet (6) is connected with a liquid nitrogen jacket outlet low-temperature stop valve (7) through a pipeline; a liquid nitrogen jacket inlet (14) which is positioned at the opposite angle of the liquid nitrogen jacket outlet (6) is arranged at the lower section of the liquid nitrogen jacket (5), and the liquid nitrogen jacket inlet (14) is connected with a liquid nitrogen jacket inlet low-temperature stop valve (13) through a pipeline;
an Ales heat-insulating layer (3) is integrally wrapped outside the combination of the inner container (4) of the liquid oxygen storage tank and the liquid nitrogen jacket (5); guided wave radar level gauge interface (8), nitrogen gas extrusion mouth (9) and differential pressure formula level gauge interface (16) stretch out the Ales heat preservation (3), and liquid nitrogen jacket export low temperature stop valve (7), the valve of relief valve sub-assembly (10), liquid nitrogen jacket import low temperature stop valve (13) stretch out Ales heat preservation (3).
2. The hypersonic speed high-temperature wind tunnel high-pressure liquid oxygen storage tank with the liquid nitrogen jacket as claimed in claim 1, wherein the inner container (4) of the liquid oxygen storage tank and the liquid nitrogen jacket (5) are made of S30408 stainless steel.
3. The hypersonic speed high-temperature wind tunnel high-pressure liquid oxygen storage tank with the liquid nitrogen jacket according to claim 1, wherein the liquid nitrogen jacket compensator (12) is a pipeline with a corrugated pipe structure, is fixed at the middle section of the liquid nitrogen jacket (5) in a welding mode, and is vertically stretched and retracted in the use process of the high-temperature wind tunnel high-pressure liquid oxygen storage tank to compensate the length tensile deformation of the liquid nitrogen jacket (5) and reduce stress.
4. The use method of the hypersonic high-temperature wind tunnel high-pressure liquid oxygen storage tank with the liquid nitrogen jacket according to any one of claims 1 to 3, characterized by comprising the following steps:
s10, purging an inner container (4) of the liquid oxygen storage tank and a liquid nitrogen jacket (5) before a test;
before the test, synchronously purging an inner container (4) of the liquid oxygen storage tank and a liquid nitrogen jacket (5); nitrogen is introduced from the nitrogen extrusion port (9) and is discharged from the liquid oxygen supply port (1), and an inner container (4) of the liquid oxygen storage tank is swept; nitrogen is introduced from an inlet (14) of the liquid nitrogen jacket and is discharged from an outlet (6) of the liquid nitrogen jacket, and the liquid nitrogen jacket (5) is purged; after the purging is finished, impurities and residual liquid do not exist in the inner container (4) of the liquid oxygen storage tank and the liquid nitrogen jacket (5);
s20, an inner container (4) of the precooled liquid oxygen storage tank;
pre-cooling an inner container (4) of the liquid oxygen storage tank through a liquid nitrogen jacket (5); opening a liquid nitrogen jacket inlet low-temperature stop valve (13) and a liquid nitrogen jacket outlet low-temperature stop valve (7), introducing liquid nitrogen from a liquid nitrogen jacket inlet (14), precooling an inner container (4) of the liquid oxygen storage tank, and then discharging nitrogen from a liquid nitrogen jacket outlet (6) to atmosphere for emptying; in the precooling process, the temperature of the container (4) in the liquid oxygen storage tank is monitored by the patch type temperature sensor (2) in real time, and the liquid nitrogen jacket inlet low-temperature stop valve (13) is closed after the container (4) in the liquid oxygen storage tank is precooled to-100 ℃; in order to prevent the liquid nitrogen in the liquid nitrogen jacket (5) from continuously vaporizing and overpressure, the low-temperature stop valve (7) at the outlet of the liquid nitrogen jacket is kept in an open state and continuously vented;
s30, filling an inner container (4) of the liquid oxygen storage tank;
liquid oxygen is introduced into the inner container (4) of the liquid oxygen storage tank from the liquid oxygen supply port (1), and the gasified oxygen is discharged to the atmosphere through a pressure relief valve of the nitrogen extrusion port (9); continuously filling liquid oxygen into the container (4) in the liquid oxygen storage tank, continuously reducing the temperature of the container (4) in the liquid oxygen storage tank to the boiling point of the liquid oxygen, beginning to accumulate liquid in the container (4) in the liquid oxygen storage tank, gradually increasing the liquid level of the liquid oxygen, and monitoring the liquid level height of the liquid oxygen in real time by a guided wave radar liquid level meter of a guided wave radar liquid level meter interface (8) and a differential pressure liquid level meter of a differential pressure liquid level meter interface (16); stopping filling the liquid oxygen when the liquid oxygen level height meets the test conditions;
s40, pressurizing an inner container (4) of the liquid oxygen storage tank, and carrying out a test;
before a test, a pressure increasing valve connected with the nitrogen extrusion port (9) is opened, and high-pressure nitrogen is adopted to increase the pressure of the liquid oxygen in the container (4) in the liquid oxygen storage tank until a pressure gauge of a safety valve assembly (10) displays that a preset test pressure is reached; continuously pressurizing, when the pressure of the inner container (4) of the liquid oxygen storage tank exceeds the preset test pressure, automatically opening a safety valve of a safety valve assembly (10), and discharging the mixed medium of high-pressure nitrogen and oxygen in the inner container (4) of the liquid oxygen storage tank until the pressure of the inner container (4) of the liquid oxygen storage tank is dynamically stabilized at the preset test pressure; carrying out a test;
s50, emptying the inner container (4) of the liquid oxygen storage tank after the test;
after the test is finished, closing the pressure increasing valve, releasing a mixed medium of high-pressure nitrogen and oxygen in the container (4) in the liquid oxygen storage tank through the pressure relief valve, and discharging the residual liquid oxygen in the container (4) in the liquid oxygen storage tank into the liquid oxygen relief tank from the liquid oxygen supply port (1) for emptying when the pressure of the container (4) in the liquid oxygen storage tank is lower than 1.0 MPa;
s60, purging an inner container (4) of the liquid oxygen storage tank and a liquid nitrogen jacket (5) after the test;
and after the test, repeating the step S10, purging the inner container (4) of the liquid oxygen storage tank and the liquid nitrogen jacket (5), and closing all valves after purging is finished to finish the work.
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