CN101509798B - Pipeline structure of fully elastic small amount of flow measuring device - Google Patents
Pipeline structure of fully elastic small amount of flow measuring device Download PDFInfo
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- CN101509798B CN101509798B CN2009100805512A CN200910080551A CN101509798B CN 101509798 B CN101509798 B CN 101509798B CN 2009100805512 A CN2009100805512 A CN 2009100805512A CN 200910080551 A CN200910080551 A CN 200910080551A CN 101509798 B CN101509798 B CN 101509798B
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Abstract
The invention relates to a pipeline structure of a full elasticity small flow rate measurement device, and the pipeline structure comprises a propellant injection pipeline, a propellant supply pipeline, a storage tank boost pipeline, a blowback gas pipeline and a storage tank gas discharging pipeline. The propellant injection pipeline is connected with a propellant storage tank and provided with a storage tank injection valve. The propellant supply pipeline is connected with the propellant injection pipeline and the propellant storage tank and provided with a liquid valve. One end of the storage tank boost pipeline is connected with a pressurized gas air source, the other end is connected with the propellant storage tank, and the storage tank boost pipeline is provided with a storage tank boost valve and a pressure transducer, and a storage tank boost transducer pipeline is provided with a control valve used for the storage tank boost transducer pipeline. One end of the blowback gas pipeline is connected with the external air source, the other end is connected with the storage tank injection pipeline and the blowback gas pipeline is provided with a blowback valve. One end of the storage tank gas discharging pipeline is connected with the storage tank boost pipeline and the other end is connected with a gas discharging electromagnetic pneumatic valve.
Description
Technical field:
The present invention relates to a kind of pipeline structure of fully elastic small amount of flow measuring device, be specifically related to the safe operation of anhydrous hydrazine propellant, use and small amount of flow measuring technical field.
Background technology:
Liquid small amount of flow measuring technology is widely used in multiple field, also is key, difficult point technology in some reseach of engine of space industry and the application.
Miniwatt electric arc heated engine is widely used in tasks such as the position maintenance, track control of synchronous satellite and middle low-orbit satellite.For cooperating with N
2H
4Be the development of propellant arc heated engine, developed a cover and be applicable to N
2H
4The full elasticity stable state weight method small amount of flow measuring device of flow measurement, this covering device can satisfy with N
2H
4Be propellant miniwatt electric arc heated engine 10mg/s～60mg/s propellant flow rate Testing requirement.
Yet hydrazine is a kind of colourless transparent liquid with similar ammonia stink, has very strong hydroscopicity, and volatile and steam combines meeting with water in the atmosphere and produces white smoke.Hydrazine has very strong reductibility, all can produce violent reaction with many chemical reaction with oxidisability, contacts the back vigorous reaction and discharges a large amount of heats with material such as iron rust.Simultaneously, hydrazine is that the II level highly endangers poisonous substance, and human body is had very big nocuity.Hydrazine in the pipeline can produce explosion phenomenon under the electric spark effect, therefore require hydrazine propellant feed pipeline except possessing conventional func such as repropellenting, supply, also need to possess function, exist blind pipe and pipeline to accumulate the phenomenon of propellant in the wall circuit design propellant blowing, cleaning in the pipeline.Careful operation in concrete use, use must guarantee safety in utilization.
For this reason, according to the characteristics of hydrazine self and the functional requirement of Flow Measuring System, full elasticity stable state weight method small amount of flow measuring system has adopted a kind of brand-new line arrangement mode.This line arrangement mode can realize functions such as repropellenting in the flow measurement device, propellant blowback, propellant feed, propellant tank supercharging, tank venting, both realized the normal running of hydrazine has also been realized the function of hydrazine propellant processing in the pipeline has been improved the security to the hydrazine operation; And adopt stainless steel tubule as the connecting line between tank and the Flow Measuring System bracing frame, avoided the error effect of non-resilient connecting line small amount of flow measuring with favorable elasticity.
The stringing mode of novelty makes flow measurement device have good functions of use, guarantees to record the liquid propellant tiny flow quantity, improves hydrazine security in use simultaneously.
Summary of the invention:
The object of the present invention is to provide a kind of pipeline structure of fully elastic small amount of flow measuring device, line arrangement mode with the novelty design has realized functions such as full elasticity stable state weight method small amount of flow measuring device hydrazine repropellenting, propellant blowback, propellant feed, tank supercharging, tank venting.Can pass through associative operation in concrete the use, realize this safe operation poisonous, volatile dangerous liquid of hydrazine; Designed spring-like stainless steel tubule can effectively solve non-resilient connecting line in the normal flow system for measuring quantity for error that flow measurement produced.Unique line arrangement mode in this cover Flow Measuring System has solved N
2H
4Miniwatt electric arc heated engine tiny flow quantity is supplied with and the functional requirement of measuring, and has improved the security in the hydrazine use simultaneously greatly.
Technical scheme of the present invention is as follows:
A kind of pipeline structure of fully elastic small amount of flow measuring device of the present invention is made up of repropellenting pipeline, propellant feed pipeline, tank pressure piping, blowback gas piping, tank blowdown piping and corresponding pipe-line control valve door.
The function of repropellenting pipeline is to be stored in hydrazine repropellenting in the transfer container in propellant tank, in order to using in the test.One end of repropellenting pipeline links to each other with the transfer container of temporary transient storage propellant, and the other end is connected with propellant tank, and the repropellenting pipeline is provided with the tank filling valve that is used for the control of pipeline switch.
The function of propellant feed pipeline is to give engine with the propellant feed in the tank.The propellant feed pipeline is connected with propellant tank by a propellant pipeline elastic tube, and with the shared interface of repropellenting pipeline, the propellant feed pipeline is provided with and is used to control the Liquid valve that propellant feed pipeline switch and function are changed.
The function of tank pressure piping is to propellant tank input pressurization gas, realizes the engine propellant feed in order to the propellant in the extruding propellant tank.One end of tank pressure piping links to each other with the pressurization gas source of the gas, and the other end links to each other with propellant tank by a pressurization gas pipeline elastic tube, and the tank pressure piping is provided with the tank supercharging valve that is used to control tank pressure piping switch; Wherein, on the tank pressure piping, further be provided with a pressure transducer, link to each other with tank pressure piping four-way connector on the tank pressure piping by tank pressurized sensor pipeline; Tank pressurized sensor pipeline is provided with the tank pressurized sensor pipe-line control valve door that is used to control tank pressure transducer switch.
The function of blowback gas piping is with in the repropellenting process by blowback gas, propellant part in the repropellenting pipeline blows into propellant tank, another part blowback is in propellant transfer container, and assurance repropellenting pipeline can not exist in the back pipe of finishing using and accumulate propellant in a large number.Blowback gas piping one end connects outside source of the gas, and the other end connects the tank charging line, and the blowback gas piping is provided with the blowback valve of control blowback gas piping switch.
The function of tank blowdown piping is fast propellant tank to be carried out release under the situation of needs.Tank blowdown piping one end links to each other with tank pressure piping four-way connector on the tank pressure piping, and the other end is connected with the venting electromagnetic pneumatic valve (not shown) of may command tank blowdown piping switch.
Wherein, described pressurization gas pipeline elastic tube is fixed on the bracing frame of flow measurement device by a pressurization gas pipeline elastic tube fixed block.
Wherein, described propellant pipeline elastic tube is fixed on the bracing frame of flow measurement device by a propellant pipeline elastic tube fixed block.
Wherein, described pressurization gas pipeline elastic tube and propellant pipeline elastic tube all adopt the stainless-steel pipe of φ 2 * 0.25.
Wherein, described pressurization gas pipeline elastic tube and propellant pipeline elastic tube all curve diameter and are about 200mm left and right sides spring-like.
A kind of pipeline structure of fully elastic small amount of flow measuring device of the present invention, its advantage and effect are: at N
2H
4On the arc heated block testing stand, adopt novel full elasticity stable state weight method small amount of flow measuring system to being that the simulation propellant has carried out the flow measurement test with alcohol, experimental measurement flow and actual flow compare.Evidence, this cover small amount of flow measuring device measuring error satisfies N less than 2%
2H
4The demand of small amount of flow measuring in the research of arc heated engine test; Simultaneously, verified that also this cover small amount of flow measuring system has better adaptability, can be used for the measurement of other liquid tiny flow quantities.
In the process of the test, at first carried out the tank pressurized test, be pressurized to 1Mpa to propellant tank, kept the impermeability of 10 minutes check systems by the tank pressure piping; After the no leakage situation to be determined, the tank boost in pressure to 2MPa, is kept 10 minutes check system impermeability equally; After the no leakage situation to be determined, promote tank pressure rechecking system impermeability once more, each boost in pressure 1MPa reaches tank design pressure 4MPa until tank pressure.
After finishing the tank air-tight test, open tank venting valve propellant tank is exitted, prepare in propellant tank, to annotate alcohol.
Adopt 0.2MPa to be filled into propellant tank to propellant transfer vessel pressurization and then with alcohol, propellant increases gradually in the tank, when the electronic balance registration in the fully elastic small amount of flow measuring device surpasses 1900g, close the tank filling valve in the repropellenting pipe system, the registration after balance is stable is 1987.62g.
In order to clear up alcohol in the repropellenting pipeline, open the blowback valve on the blowback gas piping, carry out the blowback of alcohol in the pipeline with the pressure of 0.2MPa, at this moment the registration of balance begins to increase once more, illustrate that the alcohol in the repropellenting pipeline is blown into propellant tank, and remaining part is arrived in the propellant transfer container by blowback, and the registration after the balance registration is stable is 2061.82g.
After finishing repropellenting, blowback operation, begin to carry out the propellant feed test.In the test, realize that by regulating distribution platform reduction valve propellant tank pressure is increased to 1.8MPa from 1.1MPa, wherein be provided with 5 operating modes, each operating mode duration is 10s, this mainly is to consider that the tank volume is limited, reduces simultaneously because the quality convection current that too short propellant of working time is closed loss in a flash at the outlet electromagnetic valve measures the influence that volume production is given birth to.Through the output signal of data acquisition system (DAS) acquisition stream measuring device, obtain 10s homeostasis mass rate through pressure compensation.
For verifying this flow measurement precision, use container to receive the alcohol that the outlet of propellant feed pipeline is flowed out, the corresponding operating mode of each weighing flows out the quality of alcohol, and the flow and the actual alcohol total amount/time of measurement mechanism being measured acquisition compare, and obtain the measuring accuracy of flow apparatus.
Table 1 flow verification test findings
After the propellant feed test is finished, need carry out release to propellant tank.At this moment the valve of opening on the tank supercharging blowdown piping is exitted to tank.
Test findings shows, the full elasticity stable state weight method small amount of flow measuring system of development and design can comparatively accurately record the propellant steady state flow, and measuring relative errors is less than 2%.Simultaneously, carry out repropellenting, propellant blowback, propellant tank supercharging, propellant feed, propellant tank venting test respectively according to the function of circuit design, good authentication the reasonable row and the practicality of system design, system can realize the function that designing institute is set, ensures that smoothly carrying out with the hydrazine is the security of poisonous propellant hydrazine operation in the arc heated engine test of propellant.
Description of drawings
Fig. 1 is the pipeline distribution schematic diagram of pipeline structure of fully elastic small amount of flow measuring device.
Fig. 2 is the structural drawing () of pipeline structure of fully elastic small amount of flow measuring device.
Fig. 3 is the structural drawing (two) of pipeline structure of fully elastic small amount of flow measuring device.
Concrete label is as follows among the figure:
1---tank supercharging valve 2---tank pressure piping a 3---tank pressure piping b
4---tank pressure piping c 5---pressurization gas pipeline elastic tube 6-pressurization gas pipeline elastic tube fixed block
7---tank pressure piping four-way connector 8---tank blowdown piping 9---tank pressurized sensor pipeline a
10---tank pressurized sensor pipe-line control valve door 11---tank pressurized sensor pipeline b 12---blowback valves
13---blowback gas piping a 14---blowback gas piping b 15---tank filling valves
16---tank charging line a 17---tank charging line b 18---Liquid valve a
19---Liquid valve b 20---propellant pipeline a 21---propellant pipeline elastic tubes
22---propellant pipeline elastic tube fixed block 23---propellant pipeline b 24---propellant pipeline c
25---tank feeding pipe interface
Embodiment:
Below in conjunction with accompanying drawing, technical scheme of the present invention is described further.
A kind of pipeline structure of fully elastic small amount of flow measuring device of the present invention, all pipelines and supporting by-pass valve control all are fixed on the support of this cover small amount of flow measuring device in this structure.
Liquid valve b19 one end is connected with propellant pipeline b23, the other end is connected with propellant pipeline c24, and propellant pipeline b23 is connected with the end of Liquid valve a18, the other end of Liquid valve a18 connects propellant pipeline a20, propellant pipeline a20 is connected with propellant pipeline elastic tube 21 again, and propellant pipeline elastic tube 21 connects tank feeding pipe interface 25 and finally is connected to propellant tank 26.Propellant pipeline elastic tube 21 is fixed on the bracing frame of flow measurement device by propellant pipeline elastic tube fixed block 22.
Tank charging line b17 is connected to propellant pipeline b23, be that tank filling valve 15, Liquid valve b19 communicate with the pipeline that a Liquid valve a18 end separately is connected, such layout and design are in order to satisfy the request for utilization that pipeline has repropellenting, propellant blowback simultaneously.
In the use, after finishing by 15 pairs of tanks filling of tank filling valve, for the propellant that guarantees not accumulate in the pipeline forms dangerous hidden danger, it is clean to need the design pipeline that the propellant in the charging line is got rid of.Designed the blowback pipeline, blowback valve 12 1 ends are connected with blowback gas piping a13, and the other end connects blowback gas piping b14, the terminal tank charging line b17 that connects of blowback gas piping b14.When carrying out blowback, gas enters blowback valve 12 by blowback gas piping a13, enters liquid line by blowback gas piping b14 again, makes propellant part flow tank in the charging line, and another part flows back to the repropellenting case outside the system.
Pipeline in this Flow Measuring System has been tried out the stainless-steel tube of two kinds of specifications, is respectively φ 4 * 1 and φ 2 * 1.5, and material is stainless steel material, has good anti-corrosion.Pressurization gas pipeline elastic tube 5, propellant pipeline elastic tube 21 all adopt the stainless-steel pipe of φ 2 * 1.5, the main metal tube of considering that diameter is little, tube wall is thin has better elastic, and in use φ 2 * 1.5 steel pipes are curved diameter and be about 200mm left and right sides spring-like, make bend pipe elasticity better so that eliminate the error effect of the non-resilient connection of pipeline in the small amount of flow measuring.All the other pipelines all adopt the stainless-steel pipe of φ 4 * 1.
The size of feeding pipe determines according to concrete applicable cases, at first according to the internal diameter of definite pipelines such as propellant feed flow, propellant rerum natura and flow state; Determine the thickness of pipeline again according to pipeline inner pressure, can obtain the specification of pipeline.
Propellant Supply pipeline internal diameter can be determined according to following formula:
In the formula, the internal diameter of d---pipeline; The mass rate of Q---propellant; ρ---propellant density; The speed that v---propellant flows.
The thickness on pipeline road can be determined according to following formula:
In the formula, P---circuit design pressure; The internal diameter of d---pipeline; [σ]---the permissible stress of material under the circuit design temperature; C---the additional amount of pipeline wall thickness, c=c
1+ c
2c
1---the minus deviation of tubing thickness; c
2---the corrosion of piping allowance.
Need to consider the switch control of each pipeline in the line arrangement process, overlap in the pipeline of small liquid flow measurement system at this, the hand stop valve that switch control adopts Ningbo Xingjian Aerospace Machinery Plant to produce, model is Y5708.1-91, the junction is that DN4,37 ° of bulbs connect, and external thread is M14 * 1.5, and nominal pressure is 23MPa, valve body material is 1Cr18Ni9Ti, is applicable to Korrosionsmedium.
Claims (5)
1. pipeline structure of fully elastic small amount of flow measuring device, it is characterized in that: this pipeline structure is made up of tank charging line, propellant feed pipeline, tank pressure piping, blowback gas piping, tank blowdown piping and corresponding pipe-line control valve door
The function of described tank charging line is to be stored in hydrazine repropellenting in the transfer container in propellant tank, in order to using in the test, one end of tank charging line links to each other with the transfer container of temporary transient storage propellant, the other end is connected with propellant tank, and the tank charging line is provided with the tank filling valve that is used for the control of pipeline switch;
The function of described propellant feed pipeline is to give engine with the propellant feed in the tank, the propellant feed pipeline is connected with propellant tank by a propellant pipeline elastic tube, and with the shared interface of tank charging line, the propellant feed pipeline is provided with the Liquid valve that is used to control propellant feed pipeline switch and function conversion;
The function of described tank pressure piping is to propellant tank input pressurization gas, realize the engine propellant feed in order to the propellant in the extruding propellant tank, one end of tank pressure piping links to each other with the pressurization gas source of the gas, the other end links to each other with propellant tank by a pressurization gas pipeline elastic tube, and the tank pressure piping is provided with the tank supercharging valve that is used to control tank pressure piping switch; Wherein, on the tank pressure piping, further be provided with a pressure transducer, link to each other with tank pressure piping four-way connector on the tank pressure piping by tank pressurized sensor pipeline; Tank pressurized sensor pipeline is provided with the tank pressurized sensor pipe-line control valve door that is used to control the tank pressure sensor switch;
The function of described blowback gas piping is with in the repropellenting process by blowback gas, propellant part in the tank charging line blows into propellant tank, another part blowback is in propellant transfer container, assurance tank charging line can not exist in the back pipe of finishing using and accumulate propellant in a large number, blowback gas piping one end connects outside source of the gas, the other end connects the tank charging line, and the blowback gas piping is provided with the blowback valve of control blowback gas piping switch;
The function of described tank blowdown piping is fast propellant tank to be carried out release under the situation of needs, tank blowdown piping one end links to each other with tank pressure piping four-way connector on the tank pressure piping, and the other end is connected with the venting electromagnetic pneumatic valve of may command tank blowdown piping switch.
2. pipeline structure of fully elastic small amount of flow measuring device according to claim 1 is characterized in that: described pressurization gas pipeline elastic tube is fixed on the bracing frame of flow measurement device by a pressurization gas pipeline elastic tube fixed block.
3. pipeline structure of fully elastic small amount of flow measuring device according to claim 1 is characterized in that: described propellant pipeline elastic tube is fixed on the bracing frame of flow measurement device by a propellant pipeline elastic tube fixed block.
4. pipeline structure of fully elastic small amount of flow measuring device according to claim 1 is characterized in that: described pressurization gas pipeline elastic tube and propellant pipeline elastic tube all adopt the stainless-steel pipe of φ 2 * 1.5.
5. pipeline structure of fully elastic small amount of flow measuring device according to claim 1 is characterized in that: it is 200mm left and right sides spring-like that described pressurization gas pipeline elastic tube and propellant pipeline elastic tube all curve diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100805512A CN101509798B (en) | 2009-03-20 | 2009-03-20 | Pipeline structure of fully elastic small amount of flow measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100805512A CN101509798B (en) | 2009-03-20 | 2009-03-20 | Pipeline structure of fully elastic small amount of flow measuring device |
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| Publication Number | Publication Date |
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| CN101509798A CN101509798A (en) | 2009-08-19 |
| CN101509798B true CN101509798B (en) | 2011-04-06 |
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| CN2009100805512A Expired - Fee Related CN101509798B (en) | 2009-03-20 | 2009-03-20 | Pipeline structure of fully elastic small amount of flow measuring device |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103076054B (en) * | 2012-12-31 | 2016-04-27 | 赵亚青 | A kind of method measuring minimum gas |
| CN107131931B (en) * | 2017-06-06 | 2020-02-21 | 西安航天动力试验技术研究所 | Attitude control engine high-temperature propellant steady-state flow in-situ calibration device and calibration method |
| CN109187220B (en) * | 2018-09-04 | 2021-09-24 | 北京强度环境研究所 | Low-temperature internal pressure loading method and device for airless pillow of rocket storage tank |
| CN111397699B (en) * | 2020-02-16 | 2021-07-16 | 西安航天动力试验技术研究所 | Weighing measuring device, flowmeter checking system and method |
| CN114394261B (en) * | 2021-12-21 | 2023-05-16 | 上海空间推进研究所 | Series-parallel connection decompression propulsion system and method |
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2009
- 2009-03-20 CN CN2009100805512A patent/CN101509798B/en not_active Expired - Fee Related
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| CN101509798A (en) | 2009-08-19 |
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