CN106323557A - Device and method for airtightness detection of pressure bearing parts in low-temperature environment - Google Patents
Device and method for airtightness detection of pressure bearing parts in low-temperature environment Download PDFInfo
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- CN106323557A CN106323557A CN201610924538.0A CN201610924538A CN106323557A CN 106323557 A CN106323557 A CN 106323557A CN 201610924538 A CN201610924538 A CN 201610924538A CN 106323557 A CN106323557 A CN 106323557A
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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
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
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Abstract
The invention discloses a device and a method for airtightness detection of pressure bearing parts in a low-temperature environment. Since the low-temperature environment is directly established in a tested part, low establishment and maintenance cost of the low-temperature environment is realized; internal temperature and pressure of the tested part can be controlled to change quickly according to requirements, a practical operating environment of the tested pressure bearing part can be simulated, and limit indexes of low temperature resistance and pressure resistance of the tested pressure bearing part can be tested; airtightness detection is realized by detecting whether a refrigerating agent leaks or not. An automatic data acquisition module and an automatic control module of the device are capable of fully automatically operating for a long time under an unattended condition to acquire detection data in a long period, and rated service life indexes of the tested pressure bearing part can be accurately calculated out through long-period data analysis.
Description
Technical field
The present invention relates to a kind of parts quality determining method and detection device, particularly relate to pressure-bearing under a kind of low temperature environment
The detection method of parts sealing propertytest and detection device.
Background technology
Some bearers used at low ambient temperatures or parts need to carry out seal tightness test before use, with test
Its sealing property index.These performance indications include: the sealing state under Different hypothermia and different pressures, parts permanent worker
Sealing index change when making, including working life test etc..This type component is widely used in space flight, navigation, machinery, change
In the equipment such as work, due to this type component pressure-bearing and under low temperature environment, its performance indications decide the safety of relevant device
Property, reliability and durability.This type component uses front it is generally required to carry out coherent detection.Traditional detection method is artificial structure
Build outer low temperature environment and maintain this environment, in parts, being then filled with the medium such as liquid or gas, medium being applied certain
Operating pressure, judge the most qualified of parts by the change of the detection leakage of medium or operating pressure.Current inspection
Survey method and detection device also exist following weak point: (1) needs to build outer low temperature environment, is then put into by parts low
Carrying out applied voltage test in temperature environment, the structure of low temperature environment and standing charges are costly；(2) if to change tested parts
Test temperature, can only first change the ambient temperature of structure to affect parts temperature, and due to this, to control process relatively slower,
For saving expense and time, under detection general particular environment detection of device, such as temperature, pressure are the achievement datas of definite value,
And in the practical service environment of parts, temperature and pressure is often variable, therefore Testing index data are actual with parts refers to
Mark data there may exist error.
Summary of the invention
Based on object above, the present invention proposes pressure-bearing parts method for conducting leak test and detection dress under a kind of low temperature environment
Putting, under the low temperature environment of the present invention, the step of pressure-bearing parts method for conducting leak test is as follows:
(1) input of tested pressure-bearing parts is connected the cold-producing medium outlet tube of refrigeration machine, the output of tested pressure-bearing parts
End connects the refrigerant reflux tube of refrigeration machine, builds kind of refrigeration cycle path, utilize between tested pressure-bearing parts and refrigeration machine
The cold-producing medium of liquid is injected tested pressure-bearing parts inside and circulates by refrigeration machine, controls cold-producing medium at tested pressure-bearing parts
Internal gasifier absorbs heat, and makes the temperature of tested pressure-bearing parts be reduced to detect temperature, thus builds low temperature environment；
(2) by the control of flow velocity, flow and pressure to cold-producing medium, make the temperature within tested pressure-bearing parts and pressure-bearing by
Testing requirement is changed, and simulates the actual working environment of tested pressure-bearing parts, including cycle or the non-week of temperature and pressure
Phase changes；
(3) refrigerant concentration revealed with cold-producing medium Sensor monitoring, is evaluated tested pressure-bearing parts sealing property；
(4) by single tested pressure-bearing parts long period detection process automatic data collection, accurate analytic statistics go out by
Survey the nominal operation index of aging of parts.
Under the low temperature environment of the present invention, pressure-bearing parts device for detecting sealability includes that controller 1, reaction chamber 2, first are made
Cryogen sensor the 3, first hermatic door the 4, first steering wheel 5, second refrigerant sensor the 6, second hermatic door the 7, second steering wheel 8,
Three cold-producing medium sensors 9, check valve 10, air duct 11, blower fan 12, input pipe 13, refrigeration machine 14, input pipe pressure transducer 15,
Inlet seal circle the 16, the 4th cold-producing medium sensor 17, first seals lid 18, first and seals lid steering wheel the 19, the 5th cold-producing medium sensing
Device 20, temperature sensor 21, second seal lid 22, second and seal lid steering wheel the 23, the 6th cold-producing medium sensor the 24, the 3rd sealing lid
25, the 3rd seal lid steering wheel 26, outlet tube 27, outlet tube pressure transducer 28, exit seal circle 29 and seal lid 30.
Controller 1 is positioned at reaction chamber 2 left outer bottom；Reaction chamber 2 is cuboid case structure, and there are two pieces of vertical clapboards inside
Box house vertical direction is divided into three Independent subspaces, the upper surface of reaction chamber 2 is offered three circular holes, each circular hole
Three sub spaces of the most corresponding box house, in right side wall bottom and the bottom of two pieces of vertical clapboards of reaction chamber 2, offer respectively
One circular hole, on the top of left and right sidewall and the top of two pieces of vertical clapboards of reaction chamber 2, offers circular hole respectively；At reaction chamber 2
Internally installed six cold-producing medium sensors, are the first cold-producing medium sensor 3, second refrigerant sensor the 6, the 3rd cold-producing medium respectively
Sensor the 9, the 4th cold-producing medium sensor the 17, the 5th cold-producing medium sensor the 20, the 6th cold-producing medium sensor 24, wherein the first refrigeration
Agent sensor 3 and the 6th cold-producing medium sensor 24 are in subspace, left side, and second refrigerant sensor 6 and the 5th cold-producing medium sense
Device 20 is in middle subspace, and the 3rd cold-producing medium sensor 9 and the 4th cold-producing medium sensor 17 are in subspace, right side and each
Being top in subspace and install one, bottom installs one；On the bottom circular hole of the interior two pieces of vertical clapboards of reaction chamber 2, respectively
Installing the first circular hermatic door 4 and the second hermatic door 7, the upper end of two hermatic doors is respectively by the first steering wheel 5 and the second steering wheel 8
Arbor be fixed on two pieces of vertical clapboards, and two hermatic doors can be rotated by two steering wheels respectively；The right side at reaction chamber 2
On the bottom circular hole of sidewall, install a check valve 10, the right-hand member of check valve 10 installs air duct 11, and the right-hand member of air duct 11 connects wind
The air outlet of machine 12；In the top circular hole of the right side wall of reaction chamber 2, an input pipe 13, the right-hand member position of input pipe 13 are installed
In the outside of reaction chamber 2, connect the cold-producing medium outlet tube of refrigeration machine 14, tube wall is installed a pressure transducer 15, input pipe
The left end of 13 is positioned at the subspace, right side of reaction chamber 2；In the top circular hole of the left side wall of reaction chamber 2, an output is installed
Pipe 27, the right-hand member of outlet tube 27 is positioned at the subspace, left side of reaction chamber 2, and tube wall is installed an outlet tube pressure transducer
28, the left end of outlet tube 27 is positioned at the outside of reaction chamber 2, and connects the refrigerant reflux tube of refrigeration machine 14；Upper at reaction chamber 2
On three circular holes of end face, the first sealing lid 18, second being respectively mounted circle seals lid the 22, the 3rd sealing lid 25, and three close
One end of capping is sealed lid steering wheel 19, second by first respectively and seals the steering wheel axle of lid steering wheel the 23, the 3rd sealing lid steering wheel 26 admittedly
It is scheduled on upper surface, and three seal lid and can be rotated by three steering wheels respectively；For left and right single-input single-output type pressure-bearing zero
Parts, its intermediate body portion is placed in the middle subspace of reaction chamber 2, and input and output side is each passed through two pieces of vertical clapboards
The circular hole on top, stretches in subspace, right side and subspace, left side, and right side port is by inlet seal circle 16 and input pipe 13
Left port is tightly connected, and left side port is tightly connected by the right output port of exit seal circle 29 and outlet tube 27, inlet seal circle
16 and exit seal circle 29 be nonstandard part, it is fixed to carry out according to the practical structures of the input/output terminal of pressure-bearing parts and shape
System, plays the effect connecting and sealing；One temperature sensor 21 is installed on pressure-bearing parts；In reaction chamber 2 each subspace it
Between, each pipeline and the contact position of circular-hole internal-wall, each hermatic door, each sealing are covered between casing, all carry out encapsulation process.
Sealing lid 30 is nonstandard part, and practical structures and shape according to vessel port are customized, in order to seal tested holding
Pressure parts.
The main feature of the present invention: directly at tested parts internal build low temperature environment, the structure of this low temperature environment and
Maintain low cost；The on-demand Rapid Variable Design of the temperature and pressure within tested parts can be controlled, can the reality of analogue zero parts
Border working environment, can test again low temperature resistant, the limit index of compression resistance of parts；Whether revealed by detection cold-producing medium,
Carry out sealing propertytest；The automatic data collection module of this device and automatic control module, it is possible to long in the case of unmanned
Phase fully automatic operation, to gather the detection data in long period, by the analysis of long period data, accurate statistics goes out tested zero
The nominal operation index of aging of part.Present configuration is simple, and operation principle is reliable, method of testing science, and test result is accurate, and
And the automatic safety being capable of under unmanned state runs.
Accompanying drawing explanation
Fig. 1 is the population structure schematic diagram of pressure-bearing parts device for detecting sealability under low temperature environment of the present invention；
Fig. 2 is the three dimensional structure schematic diagram of reaction chamber 2；
Fig. 3 is the structural representation of single-input single-output type pressure-bearing parts；
Fig. 4 is the structural representation of multiple-input, multiple-output type pressure-bearing parts；
Fig. 5 is the structural representation of single port container type pressure-bearing parts；
Fig. 6 is the assembling structural representation of single port container type pressure-bearing parts；
Fig. 7 is input pipe 13 structural representation that tested pressure-bearing parts match with shown in Fig. 4；
Fig. 8 is outlet tube 27 structural representation that tested pressure-bearing parts match with shown in Fig. 4.
Specific embodiment
The shape of pressure-bearing parts is diversified.By induction and conclusion, mainly include following several: shown in Fig. 3
Single-input single-output type, the multiple-input, multiple-output type shown in Fig. 4, wherein actual shown in Fig. 4 is two to enter three removing from moulds, and multiple-input, multiple-output type shows with this
Example, the single port container type etc. shown in Fig. 5；The present invention enters with the structure of the single-input single-output type pressure-bearing parts shown in Fig. 3 for case
Elaborating of row space structure, and the detection scheme of the pressure-bearing parts of other structure is illustrated；In the present invention low
Temperature environment refer to temperature below 0 °, minimum temperature environment according to selected by refrigeration machine cold-producing medium press enthalpy characteristic determine.
The detection mode that under the low temperature environment of the present invention, pressure-bearing parts device for detecting sealability is capable of includes: constant
Sealing propertytest under low temperature environment or constant pressure environment；Sealing inspection under change low temperature environment or change pressure environment
Survey；The limiting performance index determining of temperature and pressure, on the basis of sealing is destroyed；The mensuration of macrocyclic working life, with
On the basis of sealing is destroyed.
The working environment of this device: reaction chamber 2 is placed in normal temperature and pressure environment, the air in detection process raising middle flask and place
Tested parts in low temperature environment contact, and air themperature can decline, but in case, air themperature is certainly less than the boiling point of cold-producing medium
Temperature, the cold-producing medium being leaked in case is certainly in gaseous state；During detection, in casing, the temperature of air can be less than box outside temperature,
Heat exchange also can occur, in order to energy-conservation, it is possible to use insulation material manufactures box plate and dividing plate.
Detection mode under constant low temperature environment or constant pressure environment: parts to be measured are loaded reaction chamber 2 on request
In, a temperature sensor 21 is installed in the upper end of parts, and right output port is close by inlet seal circle 16 and input pipe 13 left port
Envelope connects, and left port is tightly connected by exit seal circle 29 and outlet tube 27 right output port；Under the control of controller 1, first
Hermatic door the 4, second hermatic door 7, first seal lid 18, second seal lid 22, the 3rd seal lid 25 respectively the first steering wheel 5, the
Two steering wheels 8, first seal under lid steering wheel the 19, second sealing lid steering wheel the 23, the 3rd sealing lid steering wheel 26 controls and are closed,
It is open circuit that check valve 10 leads to the direction outside casing；Refrigeration machine 14 works, and by liquid refrigerant, as a example by cold-producing medium, is pressed into defeated
Enter pipe 13, flow through inlet seal circle 16 and enter inside parts, by input pressure (the input pipe pressure transducer to cold-producing medium
15 realize data acquisition), flow velocity, flow and the control of return pressure (outlet tube pressure transducer 28 realizes data acquisition), make
Liquid refrigerant absorbs heat at parts internal gasifier, makes parts temperature decline, and gaseous refrigerant flows through exit seal circle 29 and flows
Enter outlet tube 27 and return in refrigeration machine 14；The temperature of tested parts is monitored in temperature sensor 21, when temperature reaches predetermined value
Time, control signal is passed to refrigeration machine 14, refrigeration machine 14 is by controlling the flow velocity of cold-producing medium, flow, input pressure, reflux pressure
Power, makes tested parts keep constant temperature or constant voltage；Detection is independent in three sub spaces of reaction chamber 2 respectively to be realized, left side
The sealing of space detection parts outfan, the sealing of middle subspace detection parts main part, subspace, right side
The sealing of detection parts input；If tested parts are defective, its internal cold-producing medium can be leaked to different close
In envelope subspace, detected by six cold-producing medium sensors, judge sealing by analyzing each subspace inner refrigerant concentration
Can state；The purpose arranging three sub spaces is able to accurate leakage position parts being detected, if tested
Parts are bigger, it is also possible to arrange more subspace, independent detection in many sub spaces；Every sub spaces of reaction chamber 2
Upper and lower part the reason of two cold-producing medium sensors be installed respectively be: the amount of refrigerant in being leaked to reaction chamber 2 is the lowest
Time, owing to the gaseous refrigerant in reaction chamber 2 is different with the density of air, therefore cold-producing medium and air are frequently not uniformly mixing
Distribution, installs two or more cold-producing medium sensor, is obtained in that accurate data by the method for averaging.If in regulation
In the detection time, not finding leakage of refrigerant situation, under the instruction of controller 1, refrigeration machine 14 will refrigeration by outlet tube 27
Agent sucks back, and is now taken out by tested parts, changes new tested parts, then rotates by operation at corresponding steering wheel and open
First hermatic door the 4, second hermatic door 7, first seals lid 18, second and seals lid the 22, the 3rd sealing lid 25, and blower fan 12 starts work
Make, air is blown in reaction chamber 2 by air duct 11 and check valve 10, change the air in casing, in making casing, do not contain refrigeration
Agent, there may be a little residual refrigerant and reveals when taking out tested parts, be then re-closing off each hermatic door and seal lid, weight
Multiple test job；If leakage of refrigerant occurring during detection, the concentration letter that corresponding cold-producing medium sensor will detect
Number it is transferred to controller 1, records these parts and reveal numerical value, it is judged that the foundation that parts sealing is the most qualified, the most more
The tested parts renewed, repetition is above detects process.
Sealing propertytest mode under change low temperature environment or change pressure environment: by the programme-control merit of controller 1
Can, make refrigeration machine 14 control the input pressure of cold-producing medium, return pressure, flow velocity, flow are in change, make tested parts
Temperature and internal pressure are in the change of requirement, and the process of concrete test is not changed in.
The limiting performance index determining of temperature and pressure: by reducing temperature or increasing pressure, measure parts sealing
Temperature and pressure value during inefficacy, it is thus achieved that the limiting performance index of temperature and pressure.
The mensuration of macrocyclic working life: set the temperature and pressure of amount, can be constant, it is also possible to be controlled
Change, measure the sealing data in long time period, including two ways: the continuous data in (1) long time period is surveyed
Amount: this device works continuously, the measurement data of the continuous time point in each cold-producing medium sensor acquisition cycle, until tested zero
The sealing of parts lost efficacy, it is thus achieved that its working life；(2) continuity in long time period is measured: the continuous work of this device
Make, and by control each hermatic door and seal lid, blower fan in default short period time automatic shutter once, after ventilating
Repeat test, it is thus achieved that the test data in short period time, form data acquisition system.
For multiple-input, multiple-output type pressure-bearing parts as shown in Figure 4, carry out corresponding sky at reaction chamber 2 inner utilization dividing plate
Between isolate, transform out required subspace, the input pipe 13 of respective numbers and structure be set simultaneously, as it is shown in fig. 7, and outlet tube
27, as shown in Figure 8, correspondence is attached；For single port container type pressure-bearing parts as shown in Figure 5, covered by sealing
Vessel port is sealed by 30, offers two circular holes sealing, stretch into input pipe 13, stretch into output in a hole in a hole on lid 30
Pipe 27, input pipe 13 stretches to inside parts, and outlet tube 27 stretches to parts port, builds refrigerant circulation passage,
As shown in Figure 6；Sealing lid 30 is nonstandard part, and practical structures and shape according to vessel port are customized.Freezed by control
Agent, at the input pressure of input pipe 13, the return pressure of outlet tube 27, flow velocity, flow, makes cold-producing medium gas inside single port container
Change heat absorption, build low temperature and pressure environment, and realize the circulation of cold-producing medium.
For the multiple-input, multiple-output type pressure-bearing parts shown in Fig. 4, carry out corresponding space at reaction chamber 2 inner utilization dividing plate
Isolation, transforms out required subspace；The input pipe 13 of respective numbers and structure is set simultaneously, as it is shown in fig. 7, and outlet tube
27, as shown in Figure 8, connection corresponding with the input of tested parts and outfan.
For single port container type pressure-bearing parts as shown in Figure 5, by sealing lid 30, vessel port is sealed, sealing lid
Offering two circular holes on 30, stretch into input pipe 13, stretch into outlet tube 27 in a hole in a hole, input pipe 13 stretches to zero
Inside part, outlet tube 27 stretches to parts port, builds refrigerant circulation passage；Sealing lid 30 is nonstandard part, according to
Practical structures and the shape of vessel port are customized, as shown in Figure 6.
Automatic protection functions: the refrigerant concentration in any one cold-producing medium sensor detects reaction chamber 2 exceedes pre-
Alert value, time, controller 1 controls refrigeration machine 14 and each functional module is closed.
Cold-producing medium sensor model number used in the present invention determines according to the model of cold-producing medium.
Claims (3)
1. pressure-bearing parts method for conducting leak test under low temperature environment, described method comprises the steps:
(1) input of tested pressure-bearing parts is connected the cold-producing medium outlet tube of refrigeration machine, the output of tested pressure-bearing parts
End connects the refrigerant reflux tube of refrigeration machine, builds kind of refrigeration cycle path, utilize between tested pressure-bearing parts and refrigeration machine
The cold-producing medium of liquid is injected tested pressure-bearing parts inside and circulates by refrigeration machine, controls cold-producing medium at tested pressure-bearing parts
Internal gasifier absorbs heat, and makes the temperature of tested pressure-bearing parts be reduced to detect temperature, thus builds low temperature environment；
(2) by the control of flow velocity, flow and pressure to cold-producing medium, make the temperature within tested pressure-bearing parts and pressure-bearing by
Testing requirement is changed, and simulates the actual working environment of tested pressure-bearing parts, including cycle or the non-week of temperature and pressure
Phase changes；
(3) refrigerant concentration revealed with cold-producing medium Sensor monitoring, is evaluated tested pressure-bearing parts sealing property；
(4) by single tested pressure-bearing parts long period detection process automatic data collection, accurate analytic statistics go out by
Survey the nominal operation index of aging of pressure-bearing parts.
2. by a pressure-bearing parts device for detecting sealability under method carries out low temperature environment described in claim 1, described dress
Put include controller (1), reaction chamber (2), the first cold-producing medium sensor (3), the first hermatic door (4), the first steering wheel (5), second
Cold-producing medium sensor (6), the second hermatic door (7), the second steering wheel (8), the 3rd cold-producing medium sensor (9), check valve (10), air duct
(11), blower fan (12), input pipe (13), refrigeration machine (14), input pipe pressure transducer (15), inlet seal circle (16), the 4th
Cold-producing medium sensor (17), the first sealing lid (18), the first sealing lid steering wheel (19), the 5th cold-producing medium sensor (20), temperature
Sensor (21), the second sealing lid (22), the second sealing lid steering wheel (23), the 6th cold-producing medium sensor (24), the 3rd sealing lid
(25), the 3rd seal lid steering wheel (26), outlet tube (27), outlet tube pressure transducer (28), exit seal circle (29) and seal
Lid (30), described controller (1) is positioned at reaction chamber (2) left outer bottom；Reaction chamber (2) is cuboid case structure, and inside has
Box house vertical direction is divided into three Independent subspaces by two pieces of vertical clapboards, offers three on the upper surface of reaction chamber (2)
Circular hole, three sub spaces of the most corresponding box house of each circular hole, at the right side wall bottom of reaction chamber (2) and two pieces of vertical clapboards
Bottom, offer a circular hole respectively, on the top of left and right sidewall and the top of two pieces of vertical clapboards of reaction chamber (2), open respectively
If circular hole；At internally installed six the cold-producing medium sensors of reaction chamber (2), it is the first cold-producing medium sensor (3), the second refrigeration respectively
Agent sensor (6), the 3rd cold-producing medium sensor (9), the 4th cold-producing medium sensor (17), the 5th cold-producing medium sensor (20),
Six cold-producing medium sensors (24), wherein the first cold-producing medium sensor (3) and the 6th cold-producing medium sensor (24) are in subspace, left side
In, second refrigerant sensor (6) and the 5th cold-producing medium sensor (20) in subspace, centre, the 3rd cold-producing medium sensor
And the 4th cold-producing medium sensor (17) is in subspace, right side (9), and being top in every sub spaces and install one, bottom is pacified
Fill one；On the bottom circular hole of the interior two pieces of vertical clapboards of reaction chamber (2), it is respectively mounted first hermatic door (4) and second of circle
Hermatic door (7), the upper end of two hermatic doors respectively by the arbor of the first steering wheel (5) and the second steering wheel (8) be fixed on two pieces perpendicular every
On plate, and two hermatic doors can be rotated by two steering wheels respectively；On the bottom circular hole of the right side wall of reaction chamber (2),
Install a check valve (10), the right-hand member of check valve (10) installs air duct (11), the right-hand member connecting fan (12) of air duct (11)
Air outlet；In the top circular hole of the right side wall of reaction chamber (2), an input pipe (13), the right-hand member position of input pipe (13) are installed
In the outside of reaction chamber (2), connect the cold-producing medium outlet tube of refrigeration machine (14), tube wall installed a pressure transducer (15),
The left end of input pipe (13) is positioned at the subspace, right side of reaction chamber (2)；In the top circular hole of the left side wall of reaction chamber (2),
Installing an outlet tube (27), the right-hand member of outlet tube (27) is positioned at the subspace, left side of reaction chamber (2), and tube wall installs one
Outlet tube pressure transducer (28), the left end of outlet tube (27) is positioned at the outside of reaction chamber (2), and connects the system of refrigeration machine (14)
Cryogen return duct；On three circular holes of the upper surface of reaction chamber (2), be respectively mounted circle first sealing lid (18), second
Sealing lid (22), the 3rd sealing lid (25), three one end sealing lid are sealed lid steering wheel (19), the second sealing lid by first respectively
Steering wheel (23), the 3rd steering wheel axle sealing lid steering wheel (26) are fixed on upper surface, and three sealing lids can be respectively by three
Steering wheel is rotated；For left and right single-input single-output type pressure-bearing parts, its intermediate body portion is placed in the centre of reaction chamber (2)
In subspace, input and output side is each passed through the circular hole on two pieces of vertical clapboard tops, stretches into subspace, right side and subspace, left side
In, right side port is tightly connected by the left port of inlet seal circle (16) and input pipe (13), and left side port is close by outlet
The right output port of seal (29) and outlet tube (27) is tightly connected.
Device the most according to claim 2, it is characterised in that described inlet seal circle (16) and exit seal circle (29) are
Nonstandard part, practical structures and shape according to the input/output terminal of tested pressure-bearing parts be customized, and plays connection close
The effect of envelope, tested pressure-bearing parts are installed a temperature sensor (21)；In reaction chamber (2) between each subspace, respectively manage
Road and the contact position of circular-hole internal-wall, each hermatic door, each sealing are covered between casing, all carry out encapsulation process, described sealing lid
(30) being nonstandard part, practical structures and shape according to vessel port are customized, in order to seal tested pressure-bearing parts.
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| CN201610924538.0A CN106323557B (en) | 2016-10-24 | 2016-10-24 | Pressure-bearing parts method for conducting leak test and detection device under low temperature environment |
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| CN201610924538.0A CN106323557B (en) | 2016-10-24 | 2016-10-24 | Pressure-bearing parts method for conducting leak test and detection device under low temperature environment |
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| CN106323557B CN106323557B (en) | 2018-08-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107907761A (en) * | 2017-11-03 | 2018-04-13 | 北京空间技术研制试验中心 | Test method for the component of spacecraft |
| CN116337368A (en) * | 2023-05-11 | 2023-06-27 | 江苏君澄空间科技有限公司 | Method and system for testing air tightness of air cylinder in ultralow temperature/normal temperature alternating environment |
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| CN2852090Y (en) * | 2005-12-26 | 2006-12-27 | 保一集团有限公司 | Low-temperature valve testing device based on computer data acquisition |
| CN101487759A (en) * | 2009-02-27 | 2009-07-22 | 航天材料及工艺研究所 | System and method for testing stress, displacement and airtight performance in ultra-low temperature surroundings |
| US20150028208A1 (en) * | 2013-07-23 | 2015-01-29 | General Electric Company | Leak detection of stator liquid cooling system |
| CN104568397A (en) * | 2013-10-29 | 2015-04-29 | 上海上冶阀门制造有限公司 | Multifunctional automatic performance testing device for low-temperature valve |
| CN204008018U (en) * | 2014-02-20 | 2014-12-10 | 上海出入境检验检疫局机电产品检测技术中心 | Combustible refrigerant simulation leakage device and leakage apparatus for measuring concentration |
| CN206095538U (en) * | 2016-10-24 | 2017-04-12 | 河北科技大学 | Pressure -bearing spare part leakproofness detection device under low temperature environment |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107907761A (en) * | 2017-11-03 | 2018-04-13 | 北京空间技术研制试验中心 | Test method for the component of spacecraft |
| CN116337368A (en) * | 2023-05-11 | 2023-06-27 | 江苏君澄空间科技有限公司 | Method and system for testing air tightness of air cylinder in ultralow temperature/normal temperature alternating environment |
| CN116337368B (en) * | 2023-05-11 | 2023-12-05 | 江苏君澄空间科技有限公司 | Method and system for testing air tightness of air cylinder in ultralow temperature/normal temperature alternating environment |
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| CN106323557B (en) | 2018-08-14 |
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