CN106323557B - Pressure-bearing parts method for conducting leak test and detection device under low temperature environment - Google Patents
Pressure-bearing parts method for conducting leak test and detection device under low temperature environment Download PDFInfo
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- CN106323557B CN106323557B CN201610924538.0A CN201610924538A CN106323557B CN 106323557 B CN106323557 B CN 106323557B CN 201610924538 A CN201610924538 A CN 201610924538A CN 106323557 B CN106323557 B CN 106323557B
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- bearing parts
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Classifications
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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
-
- 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
-
- 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
Abstract
Pressure-bearing parts method for conducting leak test and detection device under a kind of low temperature environment.Directly in tested parts internal build low temperature environment, the structure of this low temperature environment and maintenance are at low cost；The temperature and pressure inside tested parts can be controlled on demand quickly to change, the actual working environment of tested pressure-bearing parts can be simulated and test low temperature resistant, compression resistance the limit index of tested pressure-bearing parts；By detecting whether refrigerant is revealed, the detection of being sealed property；The automatic data collection module and automatic control module of the present apparatus, it can be in unattended long-term automatic operation, to acquire the detection data in long period, by the analysis of long period data, accurate statistics go out the nominal operation index of aging of tested pressure-bearing parts.
Description
Technical field
The present invention relates to pressure-bearings under a kind of parts quality determining method and detection device more particularly to a kind of low temperature environment
The detection method and detection device of parts sealing propertytest.
Background technology
Some bearers used at low ambient temperatures or component need being sealed property to test before using, with test
Its sealing performance index.These performance indicators include：Leakproofness state, parts permanent worker under Different hypothermia and different pressures
The variation of leakproofness index, including working life test when making 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, performance indicator to decide the safety of relevant device
Property, reliability and durability.This type component is using preceding generally requiring carry out coherent detection.Traditional detection method is artificial structure
It builds outer low temperature environment and maintains this environment, the media such as liquid or gas are then filled with into parts, medium is applied certain
Operating pressure, by detecting the leakage of medium or the variation of operating pressure judge the whether qualified of parts.Current inspection
There is following shortcomings for survey method and detection device：（1）It needs to build outer low temperature environment, then be put into parts low
Applied voltage test is carried out in warm environment, the structure and standing charges of low temperature environment are costly；（2）If changing tested parts
Test temperature, can only first change the ambient temperature of structure to influence parts temperature, since this control process is slower,
To save money and the time, under general particular environment detection of detection 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, thus Testing index data with parts are practical refers to
Mark data there may be error.
Invention content
Based on object above, pressure-bearing parts method for conducting leak test and detection dress under a kind of low temperature environment of present invention proposition
It sets, the step of pressure-bearing parts method for conducting leak test is as follows under low temperature environment of the invention：
（1）The input terminal of tested pressure-bearing parts is connected to the refrigerant efferent duct of refrigeration machine, is tested pressure-bearing parts
Output end connects the refrigerant reflux tube of refrigeration machine, and refrigeration cycle access is built between pressure-bearing parts and refrigeration machine tested,
The refrigerant of liquid is injected using refrigeration machine and is tested inside pressure-bearing parts and recycles, control refrigerant is in tested pressure-bearing zero
The internal gasifier of part absorbs heat, and so that the temperature of tested pressure-bearing parts is reduced to detection temperature, to build low temperature environment；
（2）By the control to the flow velocity of refrigerant, flow and pressure, makes the temperature inside tested pressure-bearing parts and hold
Press testing requirements to be changed, simulate the actual working environment for being tested pressure-bearing parts, including the period of temperature and pressure or
Aperiodic variation；
（3）The refrigerant concentration revealed with refrigerant Sensor monitoring comments tested pressure-bearing parts sealing performance
Valence；
（4）By the automatic data collection to being individually tested pressure-bearing parts long period detection process, accurate analysis statistics
Go out the nominal operation index of aging of tested parts.
Pressure-bearing parts device for detecting sealability includes controller 1, the system of reaction chamber 2, first under the low temperature environment of the present invention
Cryogen sensor 3, the first hermatic door 4, the first steering engine 5, second refrigerant sensor 6, the second hermatic door 7, the second steering engine 8,
Three refrigerant sensors 9, check valve 10, air duct 11, wind turbine 12, input pipe 13, refrigeration machine 14, input pipe pressure sensor 15,
Inlet seal circle 16, the 4th refrigerant sensor 17, the first sealing cover 18, the first sealing cover steering engine 19, the 5th refrigerant sensing
Device 20, temperature sensor 21, the second sealing cover 22, the second sealing cover steering engine 23, the 6th refrigerant sensor 24, third sealing cover
25, third sealing cover steering engine 26, efferent duct 27, efferent duct pressure sensor 28, exit seal circle 29 and sealing cover 30.
Controller 1 is located at 2 outside lower left quarter of reaction chamber；Reaction chamber 2 is cuboid case structure, and there are two pieces of vertical clapboards in inside
Box house vertical direction is divided into three Independent subspaces, three circular holes, each circular hole are opened up on the upper surface of reaction chamber 2
Three sub-spaces of box house are corresponded to respectively, and the lower part in the right side wall lower part of reaction chamber 2 and two pieces of vertical clapboards opens up respectively
One circular hole, the top on the top of the left and right side walls of reaction chamber 2 and two pieces of vertical clapboards open up circular hole respectively；In reaction chamber 2
Six refrigerant sensors of inside installation, are the first refrigerant sensor 3, second refrigerant sensor 6, third refrigerant respectively
Sensor 9, the 4th refrigerant sensor 17, the 5th refrigerant sensor 20, the 6th refrigerant sensor 24, wherein the first refrigeration
Agent sensor 3 and the 6th refrigerant sensor 24 are in the subspace of left side, second refrigerant sensor 6 and the 5th refrigerant sensing
For device 20 in intermediate subspace, third refrigerant sensor 9 and the 4th refrigerant sensor 17 are and each in the subspace of right side
It is top installation one in subspace, bottom installs one；In reaction chamber 2 on the lower part circular hole of two pieces of vertical clapboards, respectively
4 and second hermatic door 7 of circular first hermatic door is installed, the upper end of two hermatic doors is respectively by the first steering engine 5 and the second steering engine 8
Arbor be fixed on two pieces of vertical clapboards, and two hermatic doors can drive rotation by two steering engines respectively；On the right side of reaction chamber 2
On the lower part circular hole of side wall, a check valve 10 is installed, the right end of check valve 10 installs air duct 11, the right end connection wind of air duct 11
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 end position of input pipe 13 are installed
In the outside of reaction chamber 2, the refrigerant efferent duct of refrigeration machine 14 is connected, an input pipe pressure sensor 15 is installed on tube wall,
The left end of input pipe 13 is located in the right side subspace of reaction chamber 2；In the top circular hole of the left side wall of reaction chamber 2, installation one
The right end of root efferent duct 27, efferent duct 27 is located in the left side subspace of reaction chamber 2, and an output pipe pressure is installed on tube wall and is passed
Sensor 28, the left end of efferent duct 27 is located at the outside of reaction chamber 2, and connects the refrigerant reflux tube of refrigeration machine 14；In reaction chamber 2
Upper surface three circular holes on, circular first sealing cover 18, the second sealing cover 22, third sealing cover 25 be installed respectively, three
One end of a sealing cover is respectively by the first sealing cover steering engine 19, the steering engine of the second sealing cover steering engine 23, third sealing cover steering engine 26
Axis is fixed on upper surface, and three sealing covers can drive rotation by three steering engines respectively；Left and right single-input single-output type is held
Parts, in-between main part are pressed to be placed in the intermediate subspace of reaction chamber 2, input and output side is each passed through two pieces and erects
The circular hole on partition board top stretches into right side subspace and left side subspace, and right side port passes through 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 efferent duct 27, and entrance is close
Seal 16 and exit seal circle 29 are nonstandard parts, are carried out according to the practical structures of the input/output terminal of pressure-bearing parts and shape
Customization, plays the role of connection and sealing；One temperature sensor 21 is installed on pressure-bearing parts；Each subspace in reaction chamber 2
Between, the contact position of each pipeline and circular-hole internal-wall is sealed processing between each hermatic door, each sealing cover and babinet.
Sealing cover 30 is nonstandard part, is customized according to the practical structures of vessel port and shape, to seal tested hold
Press parts.
The main feature of the present invention：Directly in tested parts internal build low temperature environment, the structure of this low temperature environment and
Remain at low cost；The temperature and pressure inside tested parts can be controlled on demand quickly to change, the reality of parts can be simulated
Border working environment, and low temperature resistant, compression resistance the limit index of parts can be tested；By detecting whether refrigerant is revealed,
Being sealed property detects；The automatic data collection module and automatic control module of the present apparatus, can be in the case that unattended long
Phase fully automatic operation, to acquire the detection data in long period, by the analysis of long period data, accurate statistics go out tested zero
The nominal operation index of aging of part.The configuration of the present invention is simple, operation principle is reliable, and test method science, test result is accurate, and
And it can realize that the automatic safety under unattended state is run.
Description of the drawings
Fig. 1 is the general 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 diagram of reaction chamber 2；
Fig. 3 is the structural schematic diagram of single-input single-output type pressure-bearing parts；
Fig. 4 is the structural schematic diagram of multiple-input, multiple-output type pressure-bearing parts；
Fig. 5 is the structural schematic diagram of single port container type pressure-bearing parts；
Fig. 6 is the assembling structure schematic diagram of single port container type pressure-bearing parts；
13 structural schematic diagram of input pipe that Fig. 7 is with tested pressure-bearing parts match shown in Fig. 4；
27 structural schematic diagram of efferent duct that Fig. 8 is with tested pressure-bearing parts match shown in Fig. 4.
Specific embodiment
The shape of pressure-bearing parts is diversified.Include mainly following several by induction and conclusion：It is shown in Fig. 3
Single-input single-output type, multiple-input, multiple-output type shown in Fig. 4 wherein actually enter three for two shown in Fig. 4 and go out type, and multiple-input, multiple-output type is shown with this
Example, single port container type shown in fig. 5 etc.；The present invention using the structure of single-input single-output type pressure-bearing parts shown in Fig. 3 as case into
Row space structure elaborates, and the detection scheme of the pressure-bearing parts of other structures is illustrated；It is low in the present invention
Warm environment refers to temperature at 0 ° hereinafter, minimum temperature environment is determined according to the refrigerant pressure enthalpy characteristic selected by refrigeration machine.
The detection mode that can realize of pressure-bearing parts device for detecting sealability includes under the low temperature environment of the present invention：It is constant
Sealing propertytest under low temperature environment or constant pressure environment；Change the leakproofness inspection under low temperature environment or change pressure environment
It surveys；The limiting performance index determining of temperature and pressure, on the basis of leakproofness is destroyed；The measurement of macrocyclic working life, with
On the basis of leakproofness is destroyed.
The working environment of the present apparatus：Reaction chamber 2 is placed in normal temperature and pressure environment, the air in detection process raising middle flask and place
It is contacted in the tested parts of low temperature environment, air themperature can decline, but air themperature is less than the boiling point of refrigerant certainly in case
Temperature, the refrigerant being leaked in case are in gaseous state certainly；In detection process, the temperature of air can be less than box outside temperature in babinet,
Also heat exchange can occur, in order to energy saving, can use thermal insulation material manufacture box plate and partition board.
Detection mode under constant low temperature environment or constant pressure environment：Parts to be measured are packed into reaction chamber 2 as required
Interior, a temperature sensor 21 is installed in the upper end of parts, and right output port is close by inlet seal circle 16 and 13 left port of input pipe
Envelope connection, left port are tightly connected by exit seal circle 29 and 27 right output port of efferent duct；Under the control of controller 1, first
Hermatic door 4, the second hermatic door 7, the first sealing cover 18, the second sealing cover 22, third sealing cover 25 are respectively in the first steering engine 5,
Two steering engines 8, the first sealing cover steering engine 19, the second sealing cover steering engine 23, third sealing cover steering engine 26 are closed under controlling,
It is open circuit that check valve 10, which leads to the direction outside babinet,；Refrigeration machine 14 works, and by liquid refrigerant, by taking refrigerant as an example, indentation is defeated
Enter pipe 13, flows through inlet seal circle 16 and enter inside parts, pass through the input pressure to refrigerant（Input pipe pressure sensor
15 realize data acquisition）, flow velocity, flow and return pressure（Efferent duct pressure sensor 28 realizes data acquisition）Control, make
Liquid refrigerant absorbs heat in parts internal gasifier, and parts temperature is made to decline, and gaseous refrigerant flows through the stream of exit seal circle 29
Enter efferent duct 27 and returns in refrigeration machine 14；The monitoring of temperature sensor 21 is tested the temperature of parts, when temperature reaches predetermined value
When, refrigeration machine 14 is controlled signal is transmitted to, refrigeration machine 14 passes through the flow velocity of control refrigerant, flow, input pressure, reflux pressure
Power makes tested parts keep constant temperature or constant pressure；Detection independently realizes that left side is sub in three sub-spaces of reaction chamber 2 respectively
Detect the leakproofness of parts output end, the leakproofness of intermediate subspace detection parts main part, right side subspace in space
Detect the leakproofness of parts input terminal；If tested parts are defective, internal refrigerant can be leaked to different close
It seals in subspace, is detected by six refrigerant sensors, judge leakproofness by analyzing each subspace inner refrigerant concentration
It can state；The purpose that three sub-spaces are arranged is to be able to the accurate leakage position for detecting parts, if tested
Parts are larger, and more subspaces can also be arranged, the independent detection in multiple subspaces；Every sub-spaces of reaction chamber 2
Upper and lower part the reason of installing two refrigerant sensors respectively be：When the amount of refrigerant being leaked in reaction chamber 2 is very low
When, since the gaseous refrigerant in reaction chamber 2 is different with the density of air, refrigerant and air are frequently not uniform mixing
Distribution, installs two or more refrigerant sensors, accurate data can be obtained by the method for averaging.If providing
In detection time, leakage of refrigerant situation is not found, and under the instruction of controller 1, refrigeration machine 14 will freeze by efferent duct 27
Agent sucks back, and at this time takes out tested parts, changes new tested parts, then rotates by operation opening in corresponding steering engine
First hermatic door 4, the second hermatic door 7, the first sealing cover 18, the second sealing cover 22, third sealing cover 25, wind turbine 12 start work
Make, air is blown by air duct 11 and check valve 10 in reaction chamber 2, replace the air in babinet, makes in babinet without refrigeration
Agent might have a little residual refrigerant leakage, then be re-closing off each hermatic door and sealing cover, weight when taking out tested parts
Multiple test job；If occurring leakage of refrigerant in detection process, corresponding refrigerant sensor believes the concentration detected
Number be transferred to controller 1, record this parts leakage numerical value, judge parts leakproofness whether qualified foundation, then more
The tested parts renewed repeat the above detection process.
Change the sealing propertytest mode under low temperature environment or change pressure environment：Work(is controlled by the program of controller 1
Can, so that input pressure, return pressure, flow velocity, flow that refrigeration machine 14 controls refrigerant is in variation, makes tested parts
Temperature and internal pressure are in desired variation, and the process specifically tested does not change.
The limiting performance index determining of temperature and pressure：By reducing temperature or increasing pressure, parts leakproofness is measured
Temperature and pressure value when failure obtains the limiting performance index of temperature and pressure.
The measurement of macrocyclic working life：The temperature and pressure for setting amount, can be constant, can also be controlled
Variation, measure the leakproofness data in long time period, including two ways：（1）Continuous data in long time period is surveyed
Amount：Present apparatus continuous work, each refrigerant sensor obtain the measurement data of the continuous time point in the period, until being tested zero
The leakproofness of component fails, and obtains its working life；（2）Continuity in long time period measures：The continuous work of the present apparatus
Make, and primary by controlling each hermatic door and sealing cover, the wind turbine automatic shutter in preset short period time, after ventilating
Test is repeated, the test data in short period time, composition data set are obtained.
For multiple-input, multiple-output type pressure-bearing parts as shown in Figure 4, carried out in 2 inner utilization partition board of reaction chamber corresponding empty
Between be isolated, be transformed out required subspace, while the input pipe 13 of respective numbers and structure is set, as shown in fig. 7, and efferent duct
27, as shown in figure 8, correspondence is attached；For single port container type pressure-bearing parts as shown in Figure 5, pass through sealing cover
30 seal vessel port, and two circular holes are opened up on sealing cover 30, and input pipe 13 is stretched into a hole, output is stretched into a hole
Pipe 27, input pipe 13 stretch to inside parts, and efferent duct 27 stretches at parts port, build refrigerant circulation passage,
As shown in Figure 6；Sealing cover 30 is nonstandard part, is customized according to the practical structures of vessel port and shape.Freezed by controlling
Agent makes refrigerant gas inside single port container in the input pressure of input pipe 13, the return pressure of efferent duct 27, flow velocity, flow
Change heat absorption, builds low temperature and pressure environment, and realize the cycle of refrigerant.
For multiple-input, multiple-output type pressure-bearing parts shown in Fig. 4, corresponding space is carried out in 2 inner utilization partition board of reaction chamber
Isolation, is transformed out required subspace；The input pipe 13 of respective numbers and structure is set simultaneously, as shown in fig. 7, and efferent duct
27, as shown in figure 8, the input terminal and output end with tested parts are correspondingly connected with.
For single port container type pressure-bearing parts as shown in Figure 5, vessel port is sealed by sealing cover 30, in sealing cover
Two circular holes are opened up on 30, and input pipe 13 is stretched into a hole, efferent duct 27 is stretched into a hole, input pipe 13 stretches to zero
Inside part, efferent duct 27 stretches at parts port, builds refrigerant circulation passage；Sealing cover 30 is nonstandard part, according to
The practical structures and shape of vessel port are customized, as shown in Figure 6.
Automatic protection functions：When any one refrigerant sensor detects that the refrigerant concentration in reaction chamber 2 is more than pre-
When alert value, controller 1 controls refrigeration machine 14 and each function module is closed.
Refrigerant sensor model number used in the present invention is determined according to the model of refrigerant.
Claims (2)
1. pressure-bearing parts method for conducting leak test under low temperature environment, described method includes following steps：
（1）The input terminal of tested pressure-bearing parts is connected to the refrigerant efferent duct of refrigeration machine, is tested the output of pressure-bearing parts
The refrigerant reflux tube of end connection refrigeration machine builds refrigeration cycle access tested, utilizes between pressure-bearing parts and refrigeration machine
The refrigerant injection of liquid is tested inside pressure-bearing parts and is recycled by refrigeration machine, and control refrigerant is in tested pressure-bearing parts
Internal gasifier absorbs heat, and so that the temperature of tested pressure-bearing parts is reduced to detection temperature, to build low temperature environment；
（2）By the control to the flow velocity of refrigerant, flow and pressure, make temperature inside tested pressure-bearing parts and pressure-bearing by
Testing requirements are changed, and simulate the actual working environment for being tested pressure-bearing parts, including the period of temperature and pressure or non-week
Phase changes；
（3）The refrigerant concentration revealed with refrigerant Sensor monitoring evaluates tested pressure-bearing parts sealing performance；
（4）By the automatic data collection to being individually tested pressure-bearing parts long period detection process, accurate analysis count by
Survey the nominal operation index of aging of pressure-bearing parts.
2. pressure-bearing parts method for conducting leak test under low temperature environment according to claim 1, which is characterized in that realizing should
Pressure-bearing parts device for detecting sealability includes controller under the low temperature environment of method（1）, reaction chamber（2）, the first refrigerant pass
Sensor（3）, the first hermatic door（4）, the first steering engine（5）, second refrigerant sensor（6）, the second hermatic door（7）, the second steering engine
（8）, third refrigerant sensor（9）, check valve（10）, air duct（11）, wind turbine（12）, input pipe（13）, refrigeration machine（14）, it is defeated
Enter pipe pressure sensor（15）, inlet seal circle（16）, the 4th refrigerant sensor（17）, the first sealing cover（18）, it is first close
Cover steering engine（19）, the 5th refrigerant sensor（20）, temperature sensor（21）, the second sealing cover（22）, the second sealing cover rudder
Machine（23）, the 6th refrigerant sensor（24）, third sealing cover（25）, third sealing cover steering engine（26）, efferent duct（27）, output
Pipe pressure sensor（28）, exit seal circle（29）And sealing cover（30）, the controller（1）Positioned at reaction chamber（2）Left outer
Lower part；Reaction chamber（2）For cuboid case structure, inside has two pieces of vertical clapboards that box house vertical direction is divided into three independences
Subspace, in reaction chamber（2）Upper surface on open up three circular holes, three sons that each circular hole corresponds to box house respectively are empty
Between, in reaction chamber（2）Right side wall lower part and two pieces of vertical clapboards lower part, a circular hole is opened up respectively, in reaction chamber（2）'s
The top on the top of left and right side walls and two pieces of vertical clapboards, opens up circular hole respectively；In reaction chamber（2）Six refrigerants of inside installation
Sensor is the first refrigerant sensor respectively（3）, second refrigerant sensor（6）, third refrigerant sensor（9）, the 4th
Refrigerant sensor（17）, the 5th refrigerant sensor（20）, the 6th refrigerant sensor（24）, wherein the first refrigerant senses
Device（3）With the 6th refrigerant sensor（24）In the subspace of left side, second refrigerant sensor（6）It is sensed with the 5th refrigerant
Device（20）In intermediate subspace, third refrigerant sensor（9）With the 4th refrigerant sensor（17）In the subspace of right side,
And per being top installation one in sub-spaces, bottom installs one；In reaction chamber（2）The lower part circular hole of interior two pieces of vertical clapboards
On, circular first hermatic door is installed respectively（4）With the second hermatic door（7）, the upper end of two hermatic doors is respectively by the first steering engine
（5）With the second steering engine（8）Arbor be fixed on two pieces of vertical clapboards, and two hermatic doors can drive rotation by two steering engines respectively
Turn；In reaction chamber（2）Right side wall lower part circular hole on, install a check valve（10）, check valve（10）Right end install wind
Cylinder（11）, air duct（11）Right end connect wind turbine（12）Air outlet；In reaction chamber（2）Right side wall top circular hole in, peace
Fill an input pipe（13）, input pipe（13）Right end be located at reaction chamber（2）Outside, connect refrigeration machine（14）Refrigerant it is defeated
Outlet pipe installs an input pipe pressure sensor on tube wall（15）, input pipe（13）Left end be located at reaction chamber（2）Right side son
In space；In reaction chamber（2）Left side wall top circular hole in, install an efferent duct（27）, efferent duct（27）Right end position
In reaction chamber（2）Left side subspace in, on tube wall install an efferent duct pressure sensor（28）, efferent duct（27）Left end
Positioned at reaction chamber（2）Outside, and connect refrigeration machine（14）Refrigerant reflux tube；In reaction chamber（2）Three of upper surface
On circular hole, circular first sealing cover is installed respectively（18）, the second sealing cover（22）, third sealing cover（25）, three sealing covers
One end respectively by the first sealing cover steering engine（19）, the second sealing cover steering engine（23）, third sealing cover steering engine（26）Steering engine axis
It is fixed on upper surface, and three sealing covers can drive rotation by three steering engines respectively；For left and right single-input single-output type pressure-bearing
Parts, in-between main part are placed in reaction chamber（2）Intermediate subspace in, input and output side be each passed through two pieces it is perpendicular
The circular hole on partition board top stretches into right side subspace and left side subspace, and right side port passes through inlet seal circle（16）And input
Pipe（13）Left port be tightly connected, left side port passes through exit seal circle（29）And efferent duct（27）Right output port sealing connect
It connects, inlet seal circle（16）With exit seal circle（29）It is nonstandard part, according to the input/output terminal of tested pressure-bearing parts
Practical structures and shape are customized, and play the role of connection and sealing, are tested on pressure-bearing parts and are installed a temperature sensing
Device（21）；Reaction chamber（2）Between interior each subspace, the contact position of each pipeline and circular-hole internal-wall, each hermatic door, each sealing cover and case
Between body, it is sealed processing, the sealing cover（30）It is nonstandard part, is carried out according to the practical structures of vessel port and shape
Customization, to seal tested pressure-bearing parts.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 true CN106323557B (en) | 2018-08-14 |
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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 |
| 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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| 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 |
| CN101487759B (en) * | 2009-02-27 | 2011-01-12 | 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 |
| US9097657B2 (en) * | 2013-07-23 | 2015-08-04 | General Electric Company | Leak detection of stator liquid cooling system |
| CN104568397B (en) * | 2013-10-29 | 2017-10-20 | 上海上冶阀门制造有限公司 | A kind of multi-functional automatic performance test device of Subzero valve |
| CN103837304A (en) * | 2014-02-20 | 2014-06-04 | 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 concentration measurement device |
| 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 |
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