CN107063581A - Valves leakage detection means and detection method - Google Patents
Valves leakage detection means and detection method Download PDFInfo
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- CN107063581A CN107063581A CN201710406046.7A CN201710406046A CN107063581A CN 107063581 A CN107063581 A CN 107063581A CN 201710406046 A CN201710406046 A CN 201710406046A CN 107063581 A CN107063581 A CN 107063581A
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- temperature
- leakage detection
- detection means
- valves leakage
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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
- G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
- G01M3/18—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
- G01M3/184—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention provides a kind of valves leakage detection means and detection method, the valves leakage detection means includes：Housing, its lower end, which is provided with to be sticked in the lower arcuate surface that can be fitted with pipeline outer wall to be detected, the lower arcuate surface, thermoregulator；Temperature sensor, it has the first temperature point and second temperature measuring point, and the second temperature measuring point is located at the bottom of the thermoregulator, and first temperature point is in the lower arcuate surface.The valves leakage detection means and detection method of the present invention, by the way that the pipeline near valve is heated or cooled, measure the absolute value of the temperature change of same point on pipeline, and then the whether interior leakage of valve is detected in real time, it will not be influenceed by factors such as environment temperature, medium temperature, the material of pipeline and Vibration Conditions, it is simple in construction, simple operation.
Description
Technical field
The present invention is related to a kind of valve detection device and detection method, more particularly in a kind of pipeline inspection technology field
In valves leakage detection means and detection method.
Background technology
Valve primarily serves shut-off medium, the effect of shielding system in the application.But it is manufacturing defect because of valve itself, close
The sealing life-span and the reason such as improper is operated with, the phenomenon for often occurring valves leakage.Valve leaks in occurring, and will be unable to recurrence
To shut-off medium, the effect of shielding system.Heterogeneity, the medium of parameter are mixed, and different system is interconnected, and gently then makes
Economy into production technology is reduced, heavy then cause serious security incident.If can detect that valve is in real time in operation
No interior leakage, and internally leakage valve is handled in time, the economy with regard to that can effectively improve production technology ensures production security.
In the case where not dismantling valve, not changing the standing states such as pipeline configuration and appearance, operating valve is entered
Row inner hexagon, existing method has two kinds：
A kind of is that the pipe temperature measured using temperature-measuring gun after the tube wall temperature before and after valve, valve differs markedly from environment
Temperature and it less then can determine whether that valve leaks in occurring with the temperature difference before valve, but this kind of method can be only applied to pipeline
Middle medium temperature differs larger situation with environment temperature, when medium temperature is close with environment temperature in pipeline, this kind of method
It is difficult to make valves leakage accurate judgement；
Another is that, by external-clamping type ultrasonic flowmeter or detector, ultrasonic flowmeter or detector are arranged on to be measured
On pipeline, ultrasonic transducer converts electrical energy into ultrasonic energy, and emits ultrasonic acoustic waves into detected fluid, and receiver connects
The ultrasonic signal being reflected back is received, amplifies and be converted to the electric signal for representing flow by electronic circuit, then by integrating meter
Integrating, is finally shown by display.External-clamping type ultrasonic flowmeter or detector are the valves that interior leakage is flowed through based on fluid media (medium)
The principle of noise can be produced, by receiving the noise that the excessively interior leakage valve of flow of fluid medium occurs, the whether interior leakage of valve is judged.By upper
State principle to understand, external-clamping type ultrasonic flowmeter or detector can be by being in pipe material, pipeline surfaces externally and internally state, pipeline
The no influence for having a many factors such as media flow, temperature of fluid medium, pipe vibration, also to avoid when in use channel bend,
The regions such as weld seam, using preceding also need to polishing pipeline outer wall, using couplant, if without above-mentioned measure, its ultrasonic wave
Transmitting will be severely impacted with reception, and can not accurately measure.
Therefore, it is necessary to a kind of new valves leakage detection means and method be provided, to overcome drawbacks described above.
The content of the invention
It is an object of the invention to provide a kind of valves leakage detection means, by being heated to the pipeline near valve or
The absolute value of the temperature change of same point on cooling, measurement pipeline, and then the whether interior leakage of valve is detected in real time, it is not by environment temperature
The influence of the factors such as degree, medium temperature, pipe material and Vibration Condition, simple in construction, simple operation.
It is a further object to provide a kind of valves leakage detection method, by being carried out to the pipeline near valve
It is heated or cooled, the absolute value of the temperature change of same point on measurement pipeline, and then detects the whether interior leakage of valve, this method in real time
Do not influenceed by factors such as environment temperature, medium temperature, pipe material and Vibration Conditions.
The above-mentioned purpose of the present invention can be realized using following technical proposal：
The present invention provides a kind of valves leakage detection means, wherein, the valves leakage detection means includes：
Housing, its lower end is provided with the lower arcuate surface that can be fitted with pipeline outer wall to be detected, the lower arcuate surface and pasted
Provided with thermoregulator；
Temperature sensor, it has the first temperature point and second temperature measuring point, and the second temperature measuring point is located at described
The bottom of thermoregulator, first temperature point is in the lower arcuate surface.
Valves leakage detection means as described above, wherein, the top of the housing is provided with controller, the controller
Provided with display screen, the thermoregulator and the temperature sensor are electrically connected with the controller.
Valves leakage detection means as described above, wherein, the thermoregulator is ceramic heating flake.
Valves leakage detection means as described above, wherein, the outer surface of the ceramic heating plate is sticked and has aluminium foil layer.
Valves leakage detection means as described above, wherein, the thermoregulator is semiconductor chilling plate, the housing
Top be provided with radiator fan, the semiconductor chilling plate is connected by copper pipe with the radiator fan.
Valves leakage detection means as described above, wherein, being sticked in the lower arcuate surface has aerogel blanket, the airsetting
Rubber mat encloses the periphery for being located at the thermoregulator, and first temperature point is located at the bottom of the aerogel blanket.
Valves leakage detection means as described above, wherein, the edge of the lower arcuate surface of the housing is provided with sealing ring.
Valves leakage detection means as described above, wherein, the housing is the housing being made up of poly- phenolic foam material,
The inner surface of the housing and outer surface are sticked and have aluminium foil layer.
Valves leakage detection means as described above, wherein, the outer wall of the housing is symmetrically provided with two hangers.
Valves leakage detection means as described above, wherein, valve, the housing are connected with the pipeline to be detected
It is more than or equal to 30 centimetres with the distance between the valve.
A kind of valves leakage detection method, using valves leakage detection means as described above, wherein, the valves leakage
Detection method comprises the following steps：
Step A：The valves leakage detection means is placed on the outer wall of pipeline to be detected, the temperature is opened and adjusts
Device is saved, the pipeline to be detected is heated or cooled；
Step B：When the temperature of first temperature point reaches T, the thermoregulator, measurement described second are closed
The absolute value △ T of temperature variation of the temperature point in the standard time t after closing the thermoregulator2；
Step C：The absolute value △ T of the temperature variation of the second temperature measuring point under acquisition experimental state, compare institute
State absolute value △ T2With the absolute value △ T, if △ T2＞ △ T, then leak in the pipeline to be detected；If △ T2=△ T, then
The pipeline non-internal leakage to be detected.
Valves leakage detection method as described above, wherein, the temperature of the second temperature measuring point under the experimental state
The absolute value △ T of degree variable quantity are obtained as follows：
Step S1：The valves leakage detection means is placed on the outer wall of an experimental channel, the temperature is opened and adjusts
Device is saved, the experimental channel is heated or cooled；The valve non-internal leakage connected on the experimental channel；
Step S2：When the temperature of first temperature point reaches T, the thermoregulator is closed, described the is measured
The absolute value of temperature variation of two temperature points in the standard time t after closing the thermoregulator, it is described absolute
Value is the absolute value △ T.
Valves leakage detection method as described above, wherein, the temperature of the second temperature measuring point under the experimental state
Spend the absolute value △ T=△ T of variable quantity1+ 5 DEG C, wherein △ T1Normal temperature during in the experimental channel without media flow becomes
Change amount.
Valves leakage detection method as described above, wherein, the pipe thickness of the pipeline to be detected is h, described the
The distance between one temperature point and the second temperature measuring point are D, described apart from 4 times that D is the pipe thickness h, i.e. D=
4h.The features of the present invention and advantage are：
The valves leakage detection means of the present invention, it is attached by the valve on the thermoregulator pipeline to be detected to being connected to
Near duct wall is heated or cooled, and measures the absolute value of the temperature change of same point on pipeline to be detected, and then in real time
The whether interior leakage of valve is detected, the valves leakage detection means will not be by environment temperature, medium temperature, the material of pipeline and vibration
The influence of the factors such as situation, its is simple in construction, simple operation.
The valves leakage detection method of the present invention, it is attached by the valve on the thermoregulator pipeline to be detected to being connected to
Near duct wall is heated or cooled, and measures the absolute value of the temperature change of same point on pipeline to be detected, and then in real time
The whether interior leakage of valve is detected, the valves leakage detection method will not be by environment temperature, medium temperature, the material of pipeline and vibration
The influence of the factors such as situation.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, makes required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the schematic front view of the valves leakage detection means of the present invention；
Fig. 2 is the elevational schematic view of the valves leakage detection means of the present invention；
Fig. 3 is the left view schematic diagram of the valves leakage detection means of the present invention；
Fig. 4 is the schematic top plan view of the valves leakage detection means of the present invention；
Fig. 5 is placed on the structural representation on pipeline to be detected for the valves leakage detection means of the present invention.
Brief description of the drawings：1st, housing；2nd, thermoregulator；3rd, controller；4th, sealing ring；5th, hanger；6th, aerogel blanket；7th,
One temperature point；8th, second temperature measuring point；9th, lower arcuate surface；10th, temperature sensor；20th, pipeline to be detected；201st, valve.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Embodiment one
As shown in Figures 1 to 5, the present invention provides a kind of valves leakage detection means, including：Housing 1, its lower end is provided with energy
Being sticked in the lower arcuate surface 9 fitted with the outer wall of pipeline 20 to be detected, the lower arcuate surface 9 has thermoregulator 2；Temperature is passed
Sensor 10, it has the first temperature point 7 and second temperature measuring point 8, and the second temperature measuring point 8 is located at the thermoregulator
2 bottom, first temperature point 7 is in the lower arcuate surface 9.The valves leakage detection means of the present invention, passes through temperature
The duct wall near valve 201 that 2 pairs of adjuster of degree is connected on pipeline 20 to be detected is heated or cooled, and measures to be checked
The absolute value of the temperature change of same point on the pipeline 20 of survey, and then the whether interior leakage of valve 201, valves leakage inspection are detected in real time
Surveying device will not be influenceed by factors such as environment temperature, medium temperature, the material of pipeline and Vibration Conditions, and its is simple in construction,
Simple operation.
Specifically, in the present embodiment, as shown in figure 1, the generally cylindrical shape of housing 1, the lower end of housing 1 is provided with energy
The lower arcuate surface 9 fitted with the outer wall of pipeline 20 to be detected, housing 1 is made up of insulation material, and the insulation material can be poly- phenol
Aldehyde foam, the inner surface of housing 1 and outer surface, which are sticked, the reflectorized material of high reflectance, and the reflectorized material of the high reflectance can
For aluminium foil layer.Thermoregulator 2 is sticked in lower arcuate surface 9, and it is used to pipeline 20 to be detected is heated or cooled.
As shown in Fig. 2 temperature sensor 10 has the first temperature point 7 and second temperature measuring point 8, second temperature measuring point 8
Located at the bottom of thermoregulator 2, the first temperature point 7 is in lower arcuate surface 9, that is, second temperature measuring point 8 is located at temperature
On adjuster 2, the first temperature point 7 is located in lower arcuate surface 9.
In one embodiment of the present invention, as shown in Figure 3 and Figure 4, the top of housing 1 is provided with controller 3, the controller
For PLC, be additionally provided with LCDs on controller 3, thermoregulator 2 and temperature sensor 10 with the electricity of controller 3
Connection, controller 3 can control the temperature of thermoregulator 2, moreover it is possible to the signal that temperature sensor 10 is transmitted, and processing is tied
Fruit is shown by LCDs.
In one embodiment of the invention, the thermoregulator 2 can be ceramic heating flake, the radian of ceramic heating flake with
The radian of the lower arcuate surface 9 of housing 1 is identical, and the outer surface of ceramic heating flake is also sticked and has aluminium foil layer.Ceramic heating flake is existing
Technology, it is that directly in aluminium oxide ceramics, (main component is AL2O3) on green compact after printed resistor slurry, at 1600 DEG C or so
Fire under high temperature, is made after then setting electrode and lead.
In another embodiment of the present invention, the thermoregulator 2 can be semiconductor chilling plate, in this embodiment,
Conjunction with semiconductors cooling piece, radiator fan (not marked in figure) is additionally provided with the top of housing 1, the semiconductor chilling plate passes through copper
Pipe (not marked in figure, such as copper pipe may be provided in housing 1) is connected with radiator fan.Semiconductor chilling plate is that one kind compares into
Ripe prior art, wherein, the effect of radiator fan and copper pipe is mainly radiated for the hot junction of cooling piece.
According to an embodiment of the invention, lower arcuate surface 9 is sticked above aerogel blanket 6, and aerogel blanket 6, which is enclosed, to be located at
The periphery of thermoregulator 2, the first temperature point 7 is located at the bottom of aerogel blanket 6, namely the first temperature point 7 is located at airsetting
In rubber mat 6.The thermal resistance of the aerogel blanket 6 is very high, can prevent the temperature of thermoregulator 2 from being radiated to other positions of pipeline,
Ensure that test is accurate.The material that aerogel blanket 6 is known in the art, it is using nanometer titanium dioxide silica aerogel as main body material
Material, the flexible heat-insulating felt being composited by special process with glass fibre cotton or preoxidized fiber felt is characterized in heat conduction system
Number is low, has certain tension and compression strength, is easy to heat preservation construction application, belongs to new insulation material.Aerogel blanket has
The easy Cai Jian ﹑ density of Rou Ruan ﹑ is small, Wu the overall characteristics such as hydrophobic, environmental protection of machine Fang Huo ﹑.
According to an embodiment of the invention, the edge of the lower arcuate surface 9 of housing 1 is provided with sealing ring 4, sealing ring 4
Material be high-foaming material (PEVA).Sealing ring 4 can effectively between seal casinghousing 1 and pipeline 20 to be detected gap, make
Heat between the lower arcuate surface 9 of housing 1 and pipeline 20 to be detected will not scatter and disappear.
According to an embodiment of the invention, the outer wall of housing 1 is provided with two hangers 5 with symmetrically setting, and the hanger 5 can be square
The valves leakage detection means of the convenient to operate person lifting present invention.
According to an embodiment of the invention, as shown in figure 5, being connected with valve 201, housing on pipeline 20 to be detected
1 is more than or equal to 30cm with the distance between valve 201 d, by the checking of test of many times, this apart from upper test effect compared with
It is good, and test result is more accurate.
The application method of the valves leakage detection means of the present invention is as follows：As shown in figure 5, the valves leakage of the present invention is examined
Survey device be installed on the outer wall of pipeline 20 to be detected, valves leakage detection means of the invention apart from the about 30cm of valve 201,
Pipeline 20 to be detected is heated or cooled opening temperature adjuster 2, when the temperature of the first temperature point 7 reaches T, closes
Thermoregulator 2 is closed, stops being heated or cooled to pipeline 20 to be detected, now, the temperature of record second temperature measuring point 8,
Then wait after standard time t, the temperature of second temperature measuring point 8 is recorded again, the absolute value of above-mentioned two temperature difference is asked for
△T2, with absolute value △ T2Compared with the absolute value △ T of the temperature variation of the second temperature measuring point 8 obtained under experimental state
Compared with if △ T2＞ △ T, then pipeline 20 to be detected occur interior leakage；If △ T2=△ T, the then non-internal leakage of pipeline 20 to be detected.
Wherein, measurement absolute value △ T method is under experimental state：Intercepted length 50cm experimental channel, it is ensured that experiment
The surfaces externally and internally of pipeline is cleaned, without greasy dirt, and the two ends of experimental channel are blocked with high-foaming material, afterwards by the valve of the present invention
Device for detecting leakage is installed to the middle part of experimental channel, and experimental channel is heated or cooled opening temperature adjuster 2, when
When the temperature of one temperature point 7 reaches T, experimental channel is heated or cooled for closing temperature adjuster 2, stopping, and measurement is now
The temperature of second temperature measuring point 8, is then waited after standard time t, and the temperature of second temperature measuring point 8 is recorded again, is asked for above-mentioned
The absolute value of two temperature differences, the absolute value is the temperature variation of the second temperature measuring point 8 obtained under experimental state
Absolute value △ T.
The absolute value △ T of the temperature variation of the second temperature measuring point 8 obtained under experimental state meaning is：Work as experiment tube
When in road without media flow, certain point on experimental channel is heated or cooled, the hot spot or cooling point are within the unit interval
Heat consumption will be significantly less than heat consumption when having media flow in experimental channel.Then it is embodied in temperature change, it is right
Second temperature measuring point 8 is heated or cooled, when the temperature of the first temperature point 7 is reached T by heat transfer, stop heating or
Cooling, the absolute value of temperature variation of the second temperature measuring point 8 in the standard time t after stopping being heated or cooled is △ T；
If with the presence of flow media in experimental channel, then in the standard time t after stopping being heated or cooled, second temperature is surveyed
The temperature variation △ T of point 83Need to be more than △ T, can just make the temperature of the first temperature point 7 reach temperature T (in experimental channel
Flow media consume part energy).When standard time t needs to be adjusted to environment temperature more than or equal to experimental channel
Time used, depending on the specific material of experimental channel.Environment temperature is generally 10 DEG C -35 DEG C.
The valves leakage detection means of the present invention, the valve being connected to by 2 pairs of thermoregulator on pipeline 20 to be detected
Duct wall near door 201 is heated or cooled, and measures the absolute value of the temperature change of same point on pipeline 20 to be detected,
And then the whether interior leakage of valve 201 is detected in real time, the valves leakage detection means will not be by environment temperature, medium temperature, pipeline
Material and the factor such as Vibration Condition influence, its is simple in construction, simple operation.
Embodiment two
As shown in Figures 1 to 5, the present invention also provides a kind of valves leakage detection method, and this method utilizes embodiment one
In valves leakage detection means, wherein, structure, operation principle and the beneficial effect and embodiment of valves leakage detection means
One is identical, will not be repeated here.The valves leakage detection method comprises the following steps：
Step A：On the outer wall that the valves leakage detection means is placed on to pipeline 20 to be detected, the temperature is opened
Adjuster 2, the pipeline 20 to be detected is heated or cooled；
Step B：When the temperature of first temperature point 7 reaches T, stop being heated or cooled, measure second temperature
Spend the absolute value △ T of temperature variation of the measuring point 8 in the standard time t after closing the thermoregulator 22；First temperature
The temperature of degree measuring point 7 and second temperature measuring point 8 is read in the LCDs of controller 3, during closing temperature adjuster 2, note
The temperature of second temperature measuring point 8 is recorded, is waited after standard time t, the temperature value of second temperature measuring point 8 is recorded again, with below
Temperature value subtract temperature value above, then take its absolute value to obtain △ T2。
Step C：The absolute value △ T of the temperature variation of the second temperature measuring point 8 under acquisition experimental state, compare institute
State absolute value △ T2With the absolute value △ T, if △ T2＞ △ T, then leak in the pipeline 20 to be detected；If △ T2=△ T,
The then non-internal leakage of pipeline 20 to be detected.
Further, the absolute value △ T of the temperature variation of the second temperature measuring point 8 under experimental state are by such as
Lower step is obtained：
Step S1：The valves leakage detection means is placed on the outer wall of an experimental channel, the temperature is opened and adjusts
Device 2 is saved, the experimental channel is heated or cooled；The non-internal leakage of valve 201 connected on the experimental channel；
Step S2：When the temperature of first temperature point 7 reaches T, stop being heated or cooled, measure second temperature
Spend the absolute value of temperature variation of the measuring point 8 in the standard time t after closing the thermoregulator 2, the absolute value
As described absolute value △ T.Need to ensure that duct cleaning is pollution-free, without friction under experimental state.
Wherein, temperature of the second temperature measuring point 8 in the standard time t after closing the thermoregulator 2 becomes
The absolute value of change amount, its measuring method is：When the temperature of the first temperature point 7 reaches T, closing temperature adjuster 2, stopping pair
Being heated or cooled for experimental channel, measures the temperature of now second temperature measuring point 8, then waits after standard time t, records again
The temperature of second temperature measuring point 8, asks for the absolute value of above-mentioned two temperature difference, and the absolute value is to obtain under experimental state
The absolute value △ T of the temperature variation of second temperature measuring point 8.
Further, the pipe thickness of the pipeline 20 to be detected is h, first temperature point 7 and described second
The distance between temperature point 8 is D, described apart from 4 times that D is the pipe thickness h, i.e. D=4h.The He of first temperature point 7
The distance between second temperature measuring point 8, which crosses conference, causes error larger, and influence factor is excessive；First temperature point 7 and the second temperature
The distance between degree measuring point 8 is too small, then the flow media absorption heat inside pipeline is very few, and measurement result is also inaccurate, passes through
Test of many times verifies that in the state of D=4h, accuracy of measurement is higher.
Further, the absolute value △ T=of the temperature variation of the second temperature measuring point 8 under the experimental state
△T1+ 5 DEG C, △ T1Without medium in normal temperature variable quantity during in the experimental channel without media flow, namely experimental channel
The temperature variation of second temperature measuring point 8 during flowing in the standard time t after closing the thermoregulator 2 it is absolute
Value.Wherein, 5 DEG C are a surplus, it is contemplated that might have in actually detected, on pipeline get rusty, greasy dirt situations such as so that shadow
Testing result is rung, there is provided 5 DEG C of surplus, then can avoid the generation surveyed by mistake.
The valves leakage detection method of the present invention, the valve being connected to by 2 pairs of thermoregulator on pipeline 20 to be detected
Duct wall near door 201 is heated or cooled, and measures the absolute value of the temperature change of same point on pipeline 20 to be detected,
And then the whether interior leakage of valve 201 is detected in real time, the valves leakage detection method will not be by environment temperature, medium temperature, pipeline
Material and the factor such as Vibration Condition influence.
Schematical embodiment of the invention is the foregoing is only, the scope of the present invention is not limited to.It is any
Those skilled in the art, made equivalent variations and modification on the premise of the design of the present invention and principle is not departed from,
The scope of protection of the invention should be belonged to.
Claims (14)
1. a kind of valves leakage detection means, it is characterised in that the valves leakage detection means includes：
Housing, its lower end, which is provided with to be sticked in the lower arcuate surface that can be fitted with pipeline outer wall to be detected, the lower arcuate surface, to be had
Thermoregulator；
Temperature sensor, it has the first temperature point and second temperature measuring point, and the second temperature measuring point is located at the temperature
The bottom of adjuster, first temperature point is in the lower arcuate surface.
2. valves leakage detection means as claimed in claim 1, it is characterised in that the top of the housing is provided with controller,
The controller is provided with display screen, and the thermoregulator and the temperature sensor are electrically connected with the controller.
3. valves leakage detection means as claimed in claim 1, it is characterised in that the thermoregulator is ceramic heat
Piece.
4. valves leakage detection means as claimed in claim 3, it is characterised in that the outer surface of the ceramic heating plate is sticked
There is aluminium foil layer.
5. valves leakage detection means as claimed in claim 1, it is characterised in that the thermoregulator is semiconductor refrigerating
Piece, the top of the housing is provided with radiator fan, and the semiconductor chilling plate is connected by copper pipe with the radiator fan.
6. valves leakage detection means as claimed in claim 1, it is characterised in that being sticked in the lower arcuate surface has aeroge
Felt, the aerogel blanket encloses the periphery for being located at the thermoregulator, and first temperature point is located at the aerogel blanket
Bottom.
7. valves leakage detection means as claimed in claim 1, it is characterised in that the edge of the lower arcuate surface of the housing
Provided with sealing ring.
8. valves leakage detection means as claimed in claim 1, it is characterised in that the housing is by poly- phenolic foam material
The housing being made, the inner surface of the housing and outer surface are sticked and have aluminium foil layer.
9. valves leakage detection means as claimed in claim 1, it is characterised in that the outer wall of the housing is symmetrically provided with two
Individual hanger.
10. valves leakage detection means as claimed in claim 1, it is characterised in that be connected with the pipeline to be detected
The distance between valve, the housing and described valve are more than or equal to 30 centimetres.
11. a kind of valves leakage detection method, is detected using the valves leakage as any one of claim 1 to 10 and filled
Put, it is characterised in that the valves leakage detection method comprises the following steps：
Step A：The valves leakage detection means is placed on the outer wall of pipeline to be detected, the temperature adjustment is opened
Device, the pipeline to be detected is heated or cooled；
Step B：When the temperature of first temperature point reaches T, the thermoregulator is closed, the second temperature is measured
The absolute value △ T of temperature variation of the measuring point in the standard time t after closing the thermoregulator2；
Step C：The absolute value △ T of the temperature variation of the second temperature measuring point under acquisition experimental state are relatively described more exhausted
To value △ T2With the absolute value △ T, if △ T2＞ △ T, then leak in the pipeline to be detected；If △ T2=△ T, then it is described
Pipeline non-internal leakage to be detected.
12. valves leakage detection method as claimed in claim 11, it is characterised in that described second under the experimental state
The absolute value △ T of the temperature variation of temperature point are obtained as follows：
Step S1：The valves leakage detection means is placed on the outer wall of an experimental channel, the thermoregulator is opened,
The experimental channel is heated or cooled；The valve non-internal leakage connected on the experimental channel；
Step S2：When the temperature of first temperature point reaches T, the thermoregulator is closed, second temperature is measured
The absolute value of temperature variation of the measuring point in the standard time t after closing the thermoregulator is spent, the absolute value is
For the absolute value △ T.
13. valves leakage detection method as claimed in claim 12, it is characterised in that described second under the experimental state
The absolute value △ T=△ T of the temperature variation of temperature point1+ 5 DEG C, wherein △ T1During in the experimental channel without media flow
Normal temperature variable quantity.
14. valves leakage detection method as claimed in claim 11, it is characterised in that the thickness of pipe wall of the pipeline to be detected
Spend for h, the distance between first temperature point and the second temperature measuring point are D, it is described apart from D be the pipe thickness
4 times of h, i.e. D=4h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710406046.7A CN107063581A (en) | 2017-06-01 | 2017-06-01 | Valves leakage detection means and detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113551846A (en) * | 2021-08-27 | 2021-10-26 | 中国商用飞机有限责任公司 | Device for detecting leakage of water tank and aircraft comprising same |
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