CN112539895A - Special airtight test bench of space flight storage tank - Google Patents
Special airtight test bench of space flight storage tank Download PDFInfo
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- CN112539895A CN112539895A CN201910891144.3A CN201910891144A CN112539895A CN 112539895 A CN112539895 A CN 112539895A CN 201910891144 A CN201910891144 A CN 201910891144A CN 112539895 A CN112539895 A CN 112539895A
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- tee joint
- gas
- pressure
- gas circuit
- stop valve
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3236—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers
- G01M3/3272—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers for verifying the internal pressure of closed containers
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention provides a special airtight test bed for an aerospace storage tank, which comprises a gas storage bottle, a plurality of stop valves, a pressure reducing valve, a restrictor, a plurality of tee joints, a buffer gas bottle and a plurality of pressure meters, wherein the gas storage bottle, the gas storage bottle stop valves, a first stop valve, a first tee joint, a filter, the pressure reducing valve, a second tee joint, the restrictor, a third tee joint, a second stop valve and a fourth tee joint are sequentially connected through gas circuits, the fourth tee joint is connected with an upper hemisphere gas circuit and a lower hemisphere gas circuit, the upper hemisphere gas circuit comprises the buffer gas bottle, a fifth tee joint, a third pressure meter and an air inlet pipe, the fifth tee joint is connected with the third gas circuit pressure meter, and the lower hemisphere gas circuit comprises the fourth stop valve, a sixth tee joint, the fourth pressure meter. Through the design of the parallel system and the use of the buffer gas cylinder, the pressure balance of the two sides of the diaphragm of the storage tank in the airtight test process is ensured, and the pressure stability and consistency in the boosting and pressure maintaining processes can be monitored through the pressure gauge connected with the upper cavity and the lower cavity of the storage tank.
Description
Technical Field
The invention relates to the technical field of air tightness testing equipment, in particular to an air tightness test bed special for an aerospace storage box.
Background
The aerospace storage box is formed by integrally welding an upper hemisphere and a lower hemisphere made of titanium alloy materials after a diaphragm is clamped by the two hemispheres, and the diaphragm clamped inside the aerospace storage box divides the interior of a storage cavity into an upper cavity and a lower cavity which are independently sealed. In the use process, the two cavities have independent sealing performance. The diaphragm is of an arch structure, and the convex end faces the upper cavity. Under the non-working state, the lower cavity stores liquid, and the upper cavity is gas. When the device works, gas with certain pressure is introduced into the upper cavity, and the diaphragm is pushed to slowly turn over towards the lower cavity under the action of air pressure, so that liquid in the lower cavity is pushed to flow to the downstream of the system. The product belongs to a disposable product, the diaphragm is only allowed to turn over once in the use process, the air tightness of the storage box needs to be checked in the test process of the product, and therefore the test system can simultaneously pressurize the upper cavity and the lower cavity in the storage box, pressure balance of the two cavities is always maintained, and deformation or error turning of the diaphragm caused by pressure difference is prevented. Therefore, the key and difficult points of the test system for keeping the pressure balance of the two cavities in the test process are that the development of the special airtight test bed for the aerospace storage box is necessary.
Disclosure of Invention
The invention aims to provide a special airtight test bed for an aerospace storage tank, and solves the problem of airtightness test of the aerospace storage tank.
In order to solve the technical problems, the invention provides a special airtight test bed for an aerospace storage tank, which comprises a gas storage cylinder, a stop valve, a pressure reducing valve, a restrictor, a tee joint, a buffer gas cylinder and a pressure gauge, wherein the gas storage cylinder, the stop valve of the gas storage cylinder, a first stop valve, a first tee joint, a filter, the pressure reducing valve, a second tee joint, the restrictor, a third tee joint, a second stop valve and a fourth tee joint are sequentially connected through a gas circuit, the first tee joint is connected with the first pressure gauge through a gas circuit, the second tee joint is connected with the second pressure gauge through a gas circuit, the third tee joint is provided with a third stop valve, the fourth tee joint is connected with an upper hemisphere gas circuit and a lower hemisphere through a gas circuit, the upper hemisphere gas circuit comprises the buffer gas cylinder, a fifth tee joint, the third pressure gauge and a gas inlet pipe, the fourth tee joint, the buffer gas cylinder, the fifth tee joint, the lower hemisphere gas circuit comprises a fourth stop valve, a sixth tee joint, a fourth pressure gauge, a seventh tee joint and a liquid outlet nozzle, the fourth tee joint, the sixth tee joint, the seventh tee joint and the liquid outlet nozzle are sequentially connected through a gas circuit, the sixth tee joint is connected with the fourth stop valve through a gas circuit, and the seventh tee joint is connected with the fourth pressure gauge through a gas circuit.
In the above structure, the volume of the buffer gas cylinder is equal to the difference value obtained by subtracting the volume of the upper chamber from the volume of the lower chamber.
In the structure, the air inlet pipe is connected with the interface of the inner cavity of the upper hemisphere.
In the structure, the liquid outlet nozzle is connected with the lower hemisphere inner cavity interface.
The invention ensures the pressure balance of the upper side and the lower side of the diaphragm of the storage tank in the airtight test process through the design of the parallel system and the use of the buffer gas cylinder, and can monitor the pressure stability and consistency in the pressure boosting and maintaining processes through the pressure gauge connected with the upper cavity and the lower cavity of the storage tank, thereby ensuring that the diaphragm of the storage tank cannot be damaged due to the problem of the test system and meeting the test requirements of a test bed.
Drawings
Fig. 1 is a schematic view of the gas circuit connection structure of the present invention.
In the figure: 1-a gas storage cylinder, 2-a gas storage cylinder stop valve, 3-a first stop valve, 4-a first tee joint, 5-a first pressure gauge, 6-a filter, 7-a pressure reducing valve, 8-a second tee joint, 9-a second pressure gauge, 10-a restrictor, 11-a third tee joint, 12-a third stop valve, 13-a second stop valve, 14-a fourth tee joint, 15-a buffer gas cylinder, 16-a fifth tee joint, 17-a third pressure gauge, 18-a gas inlet pipe, 19-a sixth tee joint, 20-a fourth stop valve, 21-a seventh tee joint, 22-a fourth pressure gauge, 23-a liquid outlet nozzle, 24-a storage tank and 25-a filling nozzle.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in figure 1, the invention relates to a special airtight test stand for an aerospace storage tank, which comprises a gas storage cylinder 1, a plurality of stop valves (a gas storage cylinder stop valve 2, a first stop valve 3, a third stop valve 12 and a fourth stop valve 20), a pressure reducing valve 7, a restrictor 10, a plurality of tee joints (a first tee joint 4, a second tee joint 8, a third tee joint 11, a fourth tee joint 14, a fifth tee joint 16, a sixth tee joint 19, a seventh tee joint 21), a buffer gas cylinder 15 and a plurality of pressure gauges (a first pressure gauge 5, a second pressure gauge 9, a third pressure gauge 17 and a fourth pressure gauge 22), wherein the gas storage cylinder 1, the gas storage cylinder stop valve 2, the first stop valve 3, the first tee joint 4, a filter 6, the pressure reducing valve 7, the second tee joint 8, the second tee joint 10, the third tee joint 11, the second stop valve 13 and the fourth tee joint 14 are sequentially connected through a gas circuit, the first tee joint 4 is connected with the first pressure gauge 5, the second tee joint 8 is connected with the second pressure gauge 9 through a gas circuit, the third tee joint 11 is provided with a third stop valve 12, the fourth tee joint 14 is connected with an upper hemisphere gas circuit and a lower hemisphere gas circuit through gas circuits, the upper hemisphere gas circuit and the lower hemisphere gas circuit are connected in parallel, the upper hemisphere gas circuit comprises a buffer gas cylinder 15, a fifth tee joint 16, a third pressure gauge 17 and an air inlet pipe 18, the fourth tee joint 14, the buffer gas cylinder 15, the fifth tee joint 16 and the air inlet pipe 18 are sequentially connected through gas circuits, the fifth tee joint 15 is connected with the third pressure gauge 17 through a gas circuit, the lower hemisphere gas circuit comprises a fourth stop valve 20, a sixth tee joint 19, a fourth pressure gauge 22, a seventh tee joint 21 and a liquid outlet nozzle 23, the fourth tee joint 14, the sixth tee joint 19, the seventh tee joint 21 and the liquid outlet nozzle 23 are sequentially connected through gas circuits, the sixth tee joint 19 is connected with the fourth stop valve 20 through a gas circuit.
Preferably, the volume of the buffer gas cylinder 15 is equal to the difference of the lower chamber volume minus the upper chamber volume.
Preferably, the air inlet pipe 18 is connected with the upper hemisphere inner cavity interface.
Preferably, the liquid outlet nozzle 23 is connected with the lower hemisphere inner cavity interface.
The gas storage bottle 1 serves as a pressure bearing part and is used for storing high-pressure gas and providing continuous gas pressure in the test process of the system.
And the filter 6 is used for filtering the gas provided by the gas source to ensure the cleanness of the test system.
And the pressure reducing valve 7 is used for reducing the pressure of high-pressure gas provided by the gas source so that the test pressure meets the pressure index specified in the test.
The choke 10 is used for controlling the flow of the system and enabling the downstream pressure to rise smoothly.
The first pressure gauge 5 measures the pressure in an air path in front of the pressure reducing valve 7, and the second pressure gauge 9 measures the pressure in an air path behind the pressure reducing valve 7. A third pressure gauge 17 measures the pressure in the upper hemisphere and a fourth pressure gauge 22 measures the pressure in the lower hemisphere.
And the buffer gas cylinder 15 is used for protecting the safety of the test system in the test process and stabilizing the pressure building rate.
After a gas storage bottle stop valve 2 of a gas storage bottle 1 is opened, high-pressure gas in the gas storage bottle 1 supplies gas to the downstream through a first stop valve 3; the pressure of the air source and the pressure of the system after pressure reduction can be monitored by the first pressure gauge 5 in front of the pressure reduction valve 7 and the second pressure gauge 9 behind the pressure reduction valve 7; the gas source simultaneously supplies gas to an upper cavity interface (the gas inlet nozzle 18 is connected with the upper cavity interface) and a lower cavity interface (the liquid outlet nozzle 23 is connected with the lower cavity interface) of a tested piece (the storage box 24) through a parallel system, maintains the pressure balance of the two cavities and prevents the diaphragm from overturning due to the pressure difference of the two cavities. The actual gas pressure in the two chambers can be monitored at any time by the third pressure gauge 17 connected to the upper chamber and the fourth pressure gauge 22 connected to the lower chamber. Because the volume of the upper cavity of the tested piece (the storage box 24) is small, and the volume of the lower cavity is large, the buffer gas cylinder 15 is connected with the upper cavity, and the volume of the buffer gas cylinder 15 is approximately equal to the difference value between the volume of the lower cavity and the volume of the upper cavity. The filling nozzle 25 is used for filling liquid.
In the first embodiment, the gas cylinder stop valve 2 may be omitted, and the gas cylinder 1 is directly connected to the first stop valve 3 through the gas path.
In the second specific embodiment, the part of the sixth tee 19 connected to the fourth stop valve 20 may be moved into the upper hemispherical gas path, that is, the fourth tee 14 is connected to the upper hemispherical gas path and the lower hemispherical gas path, the upper hemispherical gas path includes the fourth stop valve 20, the sixth tee 19, the buffer gas cylinder 15, the fifth tee 16, the third pressure gauge 17 and the gas inlet pipe 18, the fourth tee 14, the sixth tee 19, the buffer gas cylinder 15, the fifth tee 16 and the gas inlet pipe 18 are sequentially connected by gas paths, the fifth tee 15 is connected to the third pressure gauge 17 by gas paths, the sixth tee 19 is connected to the fourth stop valve 20, the lower hemispherical gas path includes the fourth pressure gauge 22, the seventh tee 21 and the liquid outlet nozzle 23, the fourth tee 14, the seventh tee 21 and the liquid outlet nozzle 23 are sequentially connected by gas paths, and the seventh tee 21 is connected to the fourth pressure gauge 22.
The above description is only a preferred embodiment of the present patent, and not intended to limit the scope of the present patent, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the specification and the drawings, and which are directly or indirectly applied to other related technical fields, belong to the scope of the present patent protection.
Claims (4)
1. An airtight test stand special for an aerospace storage tank is characterized in that: the gas storage cylinder, the gas storage cylinder stop valve, the first tee joint, the filter, the pressure reducing valve, the second tee joint, the restrictor, the third tee joint, the second stop valve and the fourth tee joint are sequentially connected through a gas circuit, the first tee joint is connected with the first pressure gauge through a gas circuit, the second tee joint is connected with the second pressure gauge through a gas circuit, the third tee joint is provided with the third stop valve, the fourth tee joint is connected with an upper hemisphere gas circuit and a lower hemisphere through a gas circuit, the upper hemisphere gas circuit comprises a buffer gas cylinder, a fifth tee joint, a third pressure gauge and a gas inlet pipe, the fourth tee joint, the buffer gas cylinder, the fifth tee joint and the gas inlet pipe are sequentially connected, the fifth tee joint is connected with the third pressure gauge through a gas circuit, and the lower hemisphere gas circuit comprises the fourth stop valve, the sixth tee joint, the fourth pressure gauge, the seventh tee joint, a gas circuit and a gas, The liquid outlet nozzle, the fourth tee joint, the sixth tee joint, the seventh tee joint and the liquid outlet nozzle are sequentially connected through a gas circuit, the sixth tee joint is connected with the fourth stop valve through a gas circuit, and the seventh tee joint is connected with the fourth pressure gauge through a gas circuit.
2. The special airtight test bench for the aerospace storage tank as claimed in claim 1, wherein: the volume of the buffer gas cylinder is equal to the difference value of the volume of the lower cavity minus the volume of the upper cavity.
3. The special airtight test bench for the aerospace storage tank as claimed in claim 1, wherein: the air inlet pipe is connected with an inner cavity interface of the upper hemisphere.
4. The special airtight test bench for the aerospace storage tank as claimed in claim 1, wherein: the liquid outlet nozzle is connected with the lower hemisphere inner cavity interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910891144.3A CN112539895A (en) | 2019-09-20 | 2019-09-20 | Special airtight test bench of space flight storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910891144.3A CN112539895A (en) | 2019-09-20 | 2019-09-20 | Special airtight test bench of space flight storage tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112539895A true CN112539895A (en) | 2021-03-23 |
Family
ID=75012508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910891144.3A Pending CN112539895A (en) | 2019-09-20 | 2019-09-20 | Special airtight test bench of space flight storage tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112539895A (en) |
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2019
- 2019-09-20 CN CN201910891144.3A patent/CN112539895A/en active Pending
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