CN103868665B - A kind of airtight inspection method of fuel system mesohigh gas circuit - Google Patents
A kind of airtight inspection method of fuel system mesohigh gas circuit Download PDFInfo
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- CN103868665B CN103868665B CN201410131282.9A CN201410131282A CN103868665B CN 103868665 B CN103868665 B CN 103868665B CN 201410131282 A CN201410131282 A CN 201410131282A CN 103868665 B CN103868665 B CN 103868665B
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Abstract
The present invention relates to a kind of airtight inspection method of fuel system mesohigh gas circuit, belongs to high-pressure gas circuit Examined effect field.The present invention carries out the airtight inspection of high pressure using pressure differential method, and before being inflated to pressure duct in checking process, in inflation port connection inflation buffer unit, avoid because it is high-pressure aerated when, due to misoperation, the danger for causing instantaneous pressure too high and producing, while taking pressurization to be step by step inflated, has further ensured the security of gas replenishment process.
Description
Technical field
The present invention relates to high-pressure gas circuit Examined effect field, and in particular to high in a kind of fuel system
The airtight inspection method of pressure gas channel.
Background technology
The airtight inspection of high pressure is the last detection after the completion of the assembling of guided missile fuel system.High pressure is airtight
The main purpose of inspection is the reliability for ensureing guided missile high-pressure gas circuit oil circuit abutting joint, it is ensured that led
Play fuel system air-tightness under the operating mode of high-pressure work intact.General guided missile fuel system
Pressure duct the blowing pressure is 1Mpa-36Mpa, and main conduit line is the phase being connected with gas cylinder
Close the related oil circuit that gas circuit or fuel tank are connected to engine.
The method of the airtight inspection of guided missile high pressure at present is mainly pressure differential method, the master of this measuring method
Want operating process to be that specified pressure is forced into pressure duct, then carry out the pressurize of certain hour,
Make pressure remained steady in fuel system constant, enter back into the voltage stabilizing period, in voltage stabling control,
Pressure change requirement is set, to judge whether high-pressure gas circuit air-tightness is qualified.Entered using pressure differential method
The airtight inspection of horizontal high voltage, although consistent with common low pressure inspection in principle, but high pressure checked
, there is certain security risk in Cheng Zhong, therefore, except carrying out in specified factory building region, meet
Skill is pacified outside three provisioning requests, also needs to improve the technological procedure of the airtight inspection of whole high pressure.
The content of the invention
(1) technical problem to be solved
The technical problem to be solved in the present invention is：How the inspection of fuel system mesohigh gas circuit is improved
Security during looking into.
(2) technical scheme
In order to solve above-mentioned technical problem, the invention provides a kind of fuel system mesohigh gas circuit
Airtight inspection method, comprise the following steps：
S1, between the inflation port and airtight inspecting equipment of pressure duct connection inflation buffering dress
Put；
S2, the startup airtight inspecting equipment, inflation that the pressure duct is pressurizeed step by step；
S3, voltage stabilizing for a period of time, judge the difference of the pressure in pressure duct and external air pressure
Whether Δ P meets preset requirement, if being unsatisfactory for, first bleeds off the pressure-air in pressure duct
Gas leakage investigation is carried out again, investigation finishes rear return to step S1, until Δ P meets preset requirement；
If meeting preset requirement, check process terminates.
Preferably, inflation of being pressurizeed described in step S2 step by step is specially：It is inflated in three times,
It is inflated to for the first time, it is inflated to for the second time, high pressure gas are inflated to for the third time
Close detection pressure
Preferably, described a period of time is 10 minutes.
Preferably, the inflation buffer unit includes that the first ventilating part being connected with each other and second leads to
Gas portion, the diameter of first ventilating part are less than the diameter of the second ventilating part, and described first leads to
Gas portion is connected with the inflation port of the pressure duct, second ventilating part and the airtight inspection
Look into equipment connection.
Preferably, 12 times of the diameter of a diameter of first ventilating part of the second ventilating part.
(3) beneficial effect
The present invention carries out the airtight inspection of high pressure using pressure differential method, and to high-voltage tube in checking process
Before road is inflated, in inflation port connection inflation buffer unit, it is to avoid because it is high-pressure aerated when,
Due to misoperation, the danger for causing instantaneous pressure too high and producing, while take pressurizeing step by step
Method is inflated, and has further ensured the security of gas replenishment process.
Description of the drawings
Fig. 1 is method of the present invention flow chart；
The inflation buffer unit that Fig. 2 is used by the method for the present invention and pressure duct and airtight
Annexation schematic diagram between testing equipment；
Fig. 3 inflates Mathematical Modeling by the inflation buffer unit that the method for the present invention is used and illustrates
Figure.
Specific embodiment
It is to make the purpose of the present invention, content and advantage clearer, below in conjunction with the accompanying drawings and real
Example is applied, the specific embodiment of the present invention is described in further detail.
As shown in figure 1, a kind of the invention provides airtight inspection of fuel system mesohigh gas circuit
Method employing inflation buffer unit, and checked with reference to pressurization step by step, comprise the following steps：
S1, as shown in Fig. 2 in inflation port and the airtight inspection of the pressure duct 2 of test product
Look into connection inflation buffer unit 1 between equipment 3, it is ensured that the safety inflated speed to pressure duct 2
Rate；
Obtain the Mathematical Modeling used by safety inflated speed as shown in Figure 3.Gas replenishment process is one
Individual accelerator, it is possible to use the Bernoulli equation in circulationCalculate
Obtain safety inflated speed V of pressure duct0, in formulaV0
The as speed of pressure duct interior air-flow, V1Represent the speed of air-flow in buffer unit.Therefore give
When pressure duct is inflated, the inflation buffer unit can protect test product not by transient state well
The destruction of pressure.
The airtight inspecting equipment 3 is existing equipment.
S2, the startup airtight inspecting equipment 3, inflation that the pressure duct 2 is pressurizeed step by step；
In the present embodiment, it is inflated to for the first time(representing the scope of 4MPa to 6MPa), the
Defuelling is extremely(representing the scope of 19MPa to 21MPa), inflates paramount for the third time
Calm the anger close detection pressure(representing the scope of 33MPa to 35MPa).
S3, voltage stabilizing 10 minutes, judge pressure in pressure duct 2 and external air pressure it
Whether difference Δ P meets preset requirement, if being unsatisfactory for, has illustrated gas leakage, has first bled off high-voltage tube
Pressure-air in road 2 carries out gas leakage investigation again, and investigation finishes rear return to step S1 and enters again
The close inspection of promoting the circulation of qi, until Δ P meets preset requirement；If meeting preset requirement, check process
Terminate.
As shown in figure 3, the inflation buffer unit 1 includes the first ventilating part being connected with each other
101 and second ventilating part 102, the diameter of first ventilating part 101 is less than the second ventilating part
102 diameter, and the inflation port of first ventilating part 101 and the pressure duct 2 connects
Connect, second ventilating part 102 is connected with the airtight inspecting equipment 3.Second ventilating part
When 12 times of the diameter of 102 a diameter of first ventilating part 101, buffering effect is best.
As can be seen from the above embodiments, the present invention carries out the airtight inspection of high pressure using pressure differential method,
And before being inflated to pressure duct in checking process, in inflation port connection inflation buffering dress
Put, it is to avoid because it is high-pressure aerated when, due to misoperation, cause instantaneous pressure too high and produce
Danger, while taking pressurization to be step by step inflated, further ensured the peace of gas replenishment process
Quan Xing.The present invention solves gases at high pressure gas replenishment process when pressure duct is detected using pressure differential method
Safety control measures, it is ensured that send out the technological feasibility of detection pressure duct using pressure reduction.
The above is only the preferred embodiment of the present invention, it is noted that for this technology is led
For the those of ordinary skill in domain, on the premise of without departing from the technology of the present invention principle, can be with
Some improvement and deformation are made, these improve and deformation also should be regarded as protection scope of the present invention.
Claims (4)
1. a kind of airtight inspection method of fuel system mesohigh gas circuit, it is characterised in that bag
Include following steps：
S1, between the inflation port and airtight inspecting equipment of pressure duct connection inflation buffering dress
Put；The inflation buffer unit is designed using bernoulli principle, logical including first for being connected with each other
Gas portion and the second ventilating part, the diameter of first ventilating part are less than the diameter of the second ventilating part,
And first ventilating part is connected with the inflation port of the pressure duct, second ventilating part
It is connected with the airtight inspecting equipment；
S2, the startup airtight inspecting equipment, inflation that the pressure duct is pressurizeed step by step；
S3, voltage stabilizing for a period of time, judge the difference of the pressure in pressure duct and external air pressure
Whether Δ P meets preset requirement, if being unsatisfactory for preset requirement, first bleeds off in pressure duct
Pressure-air carries out gas leakage investigation again, and investigation finishes rear return to step S1, until Δ P meets pre-
If requiring；If meeting preset requirement, check process terminates.
2. the airtight inspection method of fuel system mesohigh gas circuit as claimed in claim 1,
Characterized in that, inflation of being pressurizeed described in step S2 step by step is specially：It is inflated in three times,
It is inflated to for the first timeIt is inflated to for the second timeThird time is inflated to high pressure gas
Close detection pressure
3. the airtight inspection method of fuel system mesohigh gas circuit as claimed in claim 1,
Characterized in that, described a period of time is 10 minutes.
4. the airtight inspection method of fuel system mesohigh gas circuit as claimed in claim 3,
Characterized in that, 12 times of the diameter of a diameter of first ventilating part of the second ventilating part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410131282.9A CN103868665B (en) | 2014-04-03 | 2014-04-03 | A kind of airtight inspection method of fuel system mesohigh gas circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410131282.9A CN103868665B (en) | 2014-04-03 | 2014-04-03 | A kind of airtight inspection method of fuel system mesohigh gas circuit |
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| CN103868665A CN103868665A (en) | 2014-06-18 |
| CN103868665B true CN103868665B (en) | 2017-04-05 |
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| CN201410131282.9A Active CN103868665B (en) | 2014-04-03 | 2014-04-03 | A kind of airtight inspection method of fuel system mesohigh gas circuit |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104101469A (en) * | 2014-06-19 | 2014-10-15 | 佛山市美的清湖净水设备有限公司 | Leakage detection device of ultrafiltration water purification equipment and control method |
| CN106441933A (en) * | 2016-09-21 | 2017-02-22 | 奇瑞汽车股份有限公司 | Fuel oil system air permeability testing frame and its testing method |
| CN108562413B (en) * | 2018-06-13 | 2020-12-18 | 武汉金仑汽配有限公司 | Pipe fitting gas tightness detection workbench |
| CN114323491B (en) * | 2021-12-22 | 2024-02-27 | 北京星航机电装备有限公司 | Automatic airtight detection method for low-voltage system |
| CN114486100A (en) * | 2021-12-28 | 2022-05-13 | 盛瑞传动股份有限公司 | Method for detecting oil passage of brake outer hub |
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| US5437180A (en) * | 1993-11-19 | 1995-08-01 | Sowinski; Richard F. | Detection of natural gas within a customer's domain |
| CN201344854Y (en) * | 2008-09-28 | 2009-11-11 | 新泰市产品质量监督检验所 | Multifunctional air pressure and hydraulic pressure integrated testing machine |
| CN201974277U (en) * | 2011-02-16 | 2011-09-14 | 深圳创维－Rgb电子有限公司 | Air-tight testing device |
| CN202153199U (en) * | 2011-07-04 | 2012-02-29 | 中国化学工程第六建设有限公司 | Valve air pressure test device |
| CN203178140U (en) * | 2013-04-01 | 2013-09-04 | 嘉兴市美克斯机械制造有限公司 | Pressure test device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7845211B2 (en) * | 2004-03-02 | 2010-12-07 | Car-Ber Investments Inc. | Apparatus and method for forming and testing lengths of pipe |
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2014
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5437180A (en) * | 1993-11-19 | 1995-08-01 | Sowinski; Richard F. | Detection of natural gas within a customer's domain |
| CN201344854Y (en) * | 2008-09-28 | 2009-11-11 | 新泰市产品质量监督检验所 | Multifunctional air pressure and hydraulic pressure integrated testing machine |
| CN201974277U (en) * | 2011-02-16 | 2011-09-14 | 深圳创维－Rgb电子有限公司 | Air-tight testing device |
| CN202153199U (en) * | 2011-07-04 | 2012-02-29 | 中国化学工程第六建设有限公司 | Valve air pressure test device |
| CN203178140U (en) * | 2013-04-01 | 2013-09-04 | 嘉兴市美克斯机械制造有限公司 | Pressure test device |
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| CN103868665A (en) | 2014-06-18 |
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