CN116358625A - Testing device and method for testing functions of components - Google Patents
Testing device and method for testing functions of components Download PDFInfo
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- CN116358625A CN116358625A CN202310126522.5A CN202310126522A CN116358625A CN 116358625 A CN116358625 A CN 116358625A CN 202310126522 A CN202310126522 A CN 202310126522A CN 116358625 A CN116358625 A CN 116358625A
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- 238000012360 testing method Methods 0.000 title claims abstract description 95
- 238000000034 method Methods 0.000 title description 11
- 239000002826 coolant Substances 0.000 claims description 39
- 239000007788 liquid Substances 0.000 claims description 36
- 238000010998 test method Methods 0.000 claims description 4
- 239000000523 sample Substances 0.000 claims description 3
- 239000003949 liquefied natural gas Substances 0.000 abstract description 20
- 239000007789 gas Substances 0.000 abstract description 18
- 238000010276 construction Methods 0.000 abstract description 6
- 238000009434 installation Methods 0.000 abstract description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 24
- 229910052757 nitrogen Inorganic materials 0.000 description 12
- 230000002159 abnormal effect Effects 0.000 description 5
- 238000011990 functional testing Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000007488 abnormal function Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a testing device and a testing method for testing functions of components. The air supply pipeline comprises an air inlet end and an air outlet end; the air supply pipeline sequentially comprises a first position and a second position along the direction from the air inlet end to the air outlet end. The first temperature sensor is connected with a first position of the air supply pipeline, and the second temperature sensor is connected with a second position of the air supply pipeline. The closed container is communicated with the air outlet end of the air supply pipeline, and the component to be tested is arranged in the closed container. The exhaust pipeline is communicated with the closed container. One end of the bypass pipeline is communicated with a pipeline at the rear side of the second position of the air supply pipeline, and the other end of the bypass pipeline is communicated with the air exhaust pipeline. The invention can ensure that each component has normal function before the installation of the gas supply system of the liquefied natural gas ship, reduces construction risk and saves construction period.
Description
Technical Field
The invention relates to the technical field of instrument and meter function test, in particular to a testing device and method for testing functions of components.
Background
With the improvement of environmental protection requirements, the energy conservation and emission reduction pressure is increasingly higher, and recently, newly manufactured ships increasingly adopt Liquefied Natural Gas (LNG) as a second fuel of the ships. Therefore, the importance of LNG supply systems to dual fuel vessels is self-evident.
Because of the low temperature property of LNG, components such as valves, instruments, meters, etc. provided on the LNG gas supply system need to operate in a low temperature environment for a long period of time. In the past, the performance of the low-temperature components under the actual working condition can be verified usually when LNG is filled, and if the low-temperature components are found to have functional problems during filling, the repairing treatment is very troublesome. Therefore, it is particularly important to perform functional testing on these low-temperature components before shipping.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a testing device and method for testing functions of components, so as to verify performance of low-temperature components before shipping, and avoid reworking and maintenance caused by component failure.
To achieve the above and other related objects, the present invention provides a testing apparatus for testing functions of components, comprising:
the air supply pipeline comprises an air inlet end and an air outlet end, and sequentially comprises a first position and a second position along the direction from the air inlet end to the air outlet end;
the first temperature sensor is connected with a first position of the air supply pipeline;
the second temperature sensor is connected with a second position of the air supply pipeline;
the closed container is communicated with the air outlet end of the air supply pipeline;
the component to be tested is arranged in the closed container;
the exhaust pipeline is communicated with the closed container to exhaust the medium introduced into the closed container;
and one end of the bypass pipeline is communicated with a pipeline at the rear side of the second position of the air supply pipeline, and the other end of the bypass pipeline is communicated with the air exhaust pipeline.
Optionally, the air supply line comprises:
the first air inlet valve is arranged at the air inlet end of the air supply pipeline and is arranged at the front side of the first position;
the second air inlet valve is arranged at the air outlet end of the air supply pipeline and is arranged at the rear side of the second position.
Optionally, the inlet end and the outlet end of the bypass pipeline are both provided with valves.
Optionally, the test device further comprises:
the third temperature sensor is arranged on the closed container, and a probe of the third temperature sensor extends into the closed container.
Optionally, the test device further comprises:
the cooling medium supply device is communicated with the air inlet end of the air supply pipeline.
Optionally, the closed container comprises:
a cylinder;
the upper end cover covers the top end of the cylinder body, and is provided with at least one mounting interface for mounting the components to be tested;
and the lower end cover covers the bottom end of the cylinder body.
Optionally, the test device further comprises:
the air release valve is arranged on the lower end cover and is communicated with the closed container.
Optionally, the test device further comprises:
the observation mirror window is arranged on the cylinder body of the closed container.
Optionally, the test device further comprises:
the pressure sensor is arranged at the window of the observation mirror;
and the fourth temperature sensor is arranged at the window of the observation mirror and is arranged at intervals with the pressure sensor.
Optionally, the test device further comprises:
the control device is in signal connection with the component to be tested, the first temperature sensor, the second temperature sensor, the third temperature sensor, the fourth temperature sensor and the pressure sensor.
Optionally, the component to be tested is one of a temperature sensor, a pressure sensor, a liquid level switch, a liquid level meter, a safety valve and a breather valve.
Optionally, the component to be tested is applied to a gas supply system of a liquefied natural gas ship.
The invention also provides a testing method, which is carried out by adopting the testing device and comprises the following steps:
introducing cooling medium into the air supply pipeline of the testing device, and opening the bypass pipeline when the temperature of the cooling medium detected by the second temperature sensor does not reach the set temperature range, so that the introduced cooling medium is led out from the bypass pipeline;
when the temperature of the cooling medium detected by the second temperature sensor reaches a set range, closing the bypass pipeline, and opening an air inlet valve of the closed container to enable the cooling medium to enter the closed container;
stopping introducing the cooling medium when the temperature detected by the third temperature sensor reaches a set temperature range;
functional parameters to be detected by the components to be detected are arranged in the closed container, and whether the components to be detected work normally or not is observed to judge whether the components to be detected are normal or not.
Compared with the prior art, the testing device and the method for testing the functions of the components have the following beneficial effects:
the invention relates to a testing device for testing functions of components, which comprises an air supply pipeline, a first temperature sensor, a second temperature sensor, a closed container, components to be tested and an exhaust pipeline, wherein the air supply pipeline comprises an air inlet end and an air outlet end; the air supply pipeline sequentially comprises a first position and a second position along the direction from the air inlet end to the air outlet end. The first temperature sensor is connected with a first position of the air supply pipeline, and the second temperature sensor is connected with a second position of the air supply pipeline. The closed container is communicated with the air outlet end of the air supply pipeline, and the component to be tested is arranged in the closed container. The exhaust pipeline is communicated with the closed container so as to exhaust the medium introduced into the closed container. One end of the bypass pipeline is communicated with a pipeline at the rear side of the second position of the air supply pipeline, and the other end of the bypass pipeline is communicated with the air exhaust pipeline. Therefore, the invention is characterized in that the cooling medium is introduced into the closed container through the air supply pipeline, whether the display values of the first temperature sensor and the second temperature sensor are in the set values or not is observed, and when the display value of the first temperature sensor or the display value of the second temperature sensor does not reach the set values, the cooling medium is directly discharged to the exhaust pipeline through the bypass pipeline and discharged. When the display value of the second temperature sensor reaches a set value, a cooling medium is introduced into the closed container, and when the temperature in the closed container reaches the set value, functional parameters in the component to be tested are set in the closed container, and whether the component to be tested works normally or not is observed to judge whether the component to be tested works normally or not. Furthermore, the invention can ensure that each component has normal function before the installation of the gas supply system of the liquefied natural gas ship, reduce construction risk and save construction period.
The testing method provided by the invention comprises the testing device, and the technical effects can be achieved in the same way.
Drawings
FIG. 1 is a schematic diagram of a testing device according to the present invention;
FIG. 2 is a schematic diagram of a test device according to the present invention connected to a cooling medium supply device and an exhaust gas recovery device.
List of reference numerals:
1. fourth temperature sensor of air supply line 27
11. First intake valve 28 pressure sensor
12. Exhaust pipeline of second air inlet valve 3
13. Third air inlet valve 31 first air outlet valve
14. Fourth air inlet valve 32 second air outlet valve
15. First temperature sensor 33 third air outlet valve
16. Bypass line of second temperature sensor 4
2. Air inlet valve of bypass pipeline of closed container 41
21. Air outlet valve of upper end cover 42 bypass pipeline
211. Mounting interface 5 component to be tested
22. Barrel 6 nitrogen bottle
23. Signal control box of lower end cover 7
24. Air release valve 8 computer
25. Cooling medium supply device for observation mirror window 9
26. Third temperature sensor 10 exhaust gas recovery device
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present invention, which is described by the following specific examples. The invention may be practiced or carried out in other embodiments and details within the scope and range of equivalents of the specific embodiments and ranges of equivalents, and modifications and variations may be made in the practice of the invention without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.
It should be noted that the illustrations provided in the embodiments of the invention are merely schematic illustrations of the basic concepts of the invention, and only the components related to the invention are shown in the illustrations, rather than being drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of each component in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated. The structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the present disclosure, and should not be construed as limiting the scope of the invention, since any modification, variation in proportions, or adjustment of the structures, proportions, etc. which would otherwise be used by those skilled in the art, should not be construed as limiting the scope of the invention, which is otherwise, used by the claims, without affecting the efficacy of the invention or the objects obtained.
The embodiment provides a testing arrangement for testing components and parts function, testing arrangement includes air feed pipeline, first temperature sensor, second temperature sensor, airtight container, the components and parts that await measuring and exhaust line, and air feed pipeline includes inlet end and outlet end. The air supply pipeline sequentially comprises a first position and a second position along the direction from the air inlet end to the air outlet end. The first temperature sensor is connected with a first position of the air supply pipeline, and the second temperature sensor is connected with a second position of the air supply pipeline. The closed container is communicated with the air outlet end of the air supply pipeline, and the component to be tested is arranged in the closed container. The exhaust pipeline is communicated with the closed container so as to exhaust the medium introduced into the closed container. One end of the bypass pipeline is communicated with a pipeline at the rear side of the second position of the air supply pipeline, and the other end of the bypass pipeline is communicated with the air exhaust pipeline.
Specifically, referring to fig. 1, in a direction from an inlet end to an outlet end of the air supply line 1, a first position and a second position are provided on the air supply line 1, and a first air intake valve 11 is provided on a front side of the first position and near the inlet end of the air supply line 1. The second air inlet valve 12 is disposed at the rear side of the second position and near the air outlet end of the air supply line 1. The first temperature sensor 15 is connected to a first location of the air supply line 1 and the second temperature sensor 16 is connected to a second location of the air supply line 1.
Referring to fig. 1, a closed casing 2 communicates with a second intake valve 12 of an air supply line 1. The closed container 2 is used for storing and providing cooling medium required by test and can bear certain pressure. The cooling medium includes, but is not limited to, liquefied natural gas and liquid nitrogen, and can be other mediums capable of cooling. The closed casing 2 includes a cylindrical body 22, an upper end cap 21, and a lower end cap 23. Alternatively, the cylinder 22 may be made of a large-caliber thickened stainless steel pipe, stainless steel flanges are welded at two ends of the cylinder 22, and the outer surface is wrapped with a low-temperature-resistant insulating material. The upper end cap 21 covers the top end of the cylinder 22, and the lower end cap 23 covers the bottom end of the cylinder 22. Optionally, the upper end cover 21 and the lower end cover 23 are blind flanges, and the closed container 2 is sealed by using the blind flanges. At least one mounting interface 211 is provided on the upper end cap 21, and the mounting structure is used for mounting the component 5 to be tested. In this embodiment, the upper end cover 21 is disposed on a plurality of mounting interfaces 211, and the size of the mounting interfaces 211 corresponds to the size of the component to be mounted. In the present invention, the mounting interfaces 211 on the upper end cap 21 include, but are not limited to, a temperature sensor mounting interface 211, a pressure sensor 28 mounting interface 211, and a level switch mounting interface 211, a level gauge mounting interface 211, a relief valve mounting interface 211, and a breather valve mounting interface 211. In this embodiment, a third temperature sensor 26 is further mounted on the upper end cover 21, and a temperature probe of the third temperature sensor 26 extends into the closed container 2 to detect the temperature in the closed container 2. Optionally, a sampling port is further provided on the upper end cover 21, and the sampling port is connected with a gas component detection device, so that the gas component can be detected. The lower end cap 23 is provided with a gas release valve 24, and the gas release valve 24 is communicated with the closed container 2 for adjusting the pressure in the closed container 2. The barrel 22 is provided with a view mirror window 25 from the lower end cover 23 to one third of the direction of the upper end cover 21. A fourth temperature sensor 27 and a pressure sensor 28 are also provided in the scope window 25 to monitor the temperature and pressure in the closed vessel 2.
Referring to fig. 1, a first air outlet valve 31 and a second air outlet valve 32 are sequentially disposed on the air exhaust pipeline 3 along a direction from an air inlet end to an air outlet end of the air exhaust pipeline 3. Optionally, a third air outlet valve 33 is further connected to the air exhaust pipeline 3, and the third air outlet valve 33 is disposed between the first air outlet valve 31 and the second air outlet valve 32 of the air exhaust pipeline 3. One end of the bypass pipeline 4 is communicated with the air supply pipeline 1, and the other end is communicated with the exhaust pipeline 3. Specifically, the bypass line 4 connects the second position of the air supply line 1 and the line between the second air inlet valves 12. The bypass line 4 is connected to a line between the first air outlet valve 31 and the second air outlet valve 32 of the exhaust line 3. In this embodiment, the air supply line 1 and the bypass line 4 between the first temperature sensor 15 and the second temperature sensor 16 may be connected by a metal hose, and the line connecting the air discharge line 3 and the flare stack may also be connected by a metal hose, so as to facilitate disassembly.
Alternatively, referring to fig. 2, the air inlet end of the air supply line 1 is connected to a cooling medium supply device, and a third air inlet valve 13 is provided on the line connected to the cooling medium supply device, and the air outlet end of the air exhaust line 3 is connected to an exhaust gas recovery device. Optionally, the cooling medium providing device is an LNG tank car, and the waste gas recovery device is a flare stack for treating the combustible gas generated in the testing process to ensure safe development of the test. Optionally, the air inlet end of the air supply pipeline 1 is also communicated with a nitrogen bottle 6, and the nitrogen bottle 6 is used for storing nitrogen, pressure testing or inerting purging of the pipeline/closed container. A fourth intake valve 14 is also provided in the pipe line that communicates with the nitrogen cylinder 6.
Optionally, referring to fig. 1 or 2, the testing device further includes a control device, and the control device is in signal connection with the component 5 to be tested, the first temperature sensor 15, the second temperature sensor 16, the third temperature sensor 26, the fourth temperature sensor 27, and the pressure sensor 28. In this embodiment, the control device is a signal control box 7 and a computer 8, and the control device can monitor the data obtained by testing the components 5 to be tested, the first temperature sensor 15, the second temperature sensor 16, the third temperature sensor 26, the fourth temperature sensor 27 and the pressure sensor 28 in real time, and record and monitor the data monitored in real time. Optionally, the component 5 to be tested is one of a temperature sensor, a pressure sensor, a liquid level switch, a liquid level meter, a safety valve and a breather valve. In this embodiment, the component 5 to be tested is applied to the gas supply system of the lng ship. Because the LNG gas supply system is in a low-temperature environment, the functions of the components applied to the gas supply system in the low-temperature environment are required to be tested and verified, so that the problems found in the actual application of the components are avoided, and the repair is difficult.
Alternatively, in this embodiment, all of the air inlet valves and the air outlet valves may be ball valves to control the opening and closing between the pipeline and the closed container.
The present embodiment also provides a test method, referring to fig. 1 or 2, including:
s101: introducing cooling medium into the air supply pipeline 1 of the testing device, and opening the bypass pipeline 4 when the temperature of the cooling medium detected by the second temperature sensor 16 does not reach the set temperature range, so that the introduced cooling medium is led out from the bypass pipeline 4;
s102: when the temperature of the cooling medium detected by the second temperature sensor 16 reaches a set range, the bypass pipeline 4 is closed, and the air inlet valve of the closed container 2 is opened to enable the cooling medium to enter the closed container 2;
s103: stopping the introduction of the cooling medium when the temperature detected by the third temperature sensor 26 reaches the set temperature range;
s104: functional parameters to be detected by the component 5 to be detected are arranged in the closed container 2, and whether the component 5 to be detected works normally is observed to judge whether the component 5 to be detected works normally.
The test apparatus and the test method according to the present invention will be described in detail with reference to specific examples.
The present embodiment selects the fluid level switch as the test object. And performing performance test on the liquid level switch through the testing device. The test is divided into two parts, the first part: and performing temperature drop test on the liquid level switch to test whether the liquid level switch has abnormal functions in the temperature drop process. A second part: immersing the liquid level switch in the liquid LNG, and observing whether the liquid level switch works normally or not when the liquid level reaches a set value. The cooling medium is LNG gas, and is provided by an LNG tank truck. The combustible gas produced during the test is vented to the flare stack. The method comprises the following specific steps:
referring to fig. 2, the pipelines of the testing device are connected according to fig. 2, and the flare stack is ignited by open flame to avoid direct emptying of combustible gas. After the corresponding devices and the pipelines are connected, the special conditions such as required temperature, pressure and the like required by the detected components are required to be met, so that experimental tests can be carried out. In this embodiment, before testing, the test is performed after the detection environment is set to a certain low-temperature environment.
1) Temperature drop test for liquid level switch
Before the test, the tightness strength test is firstly carried out on the test device, so that the pipeline is ensured not to leak.
The high-purity nitrogen in the nitrogen bottle 6 is utilized to carry out inerting treatment on the pipeline, so that the oxygen content in the testing device is reduced to below 5%, the dew point is reduced to below minus 30 ℃, and the experiment is ensured to be carried out safely and smoothly. Specifically, the fourth air inlet valve 14, the first air inlet valve 11, the bypass line air outlet valve 41, the bypass line air outlet valve 42, and the second air outlet valve 32 are sequentially opened, and the line is inertly purged with nitrogen in the nitrogen cylinder 6. Through a cylinder connected with the closed container 222 on the blind flange of the upper end cap 21, and a third temperature sensor 26, to determine the state of the inside of the cylinder 22, when the oxygen content O in the cylinder 22 2 And after the dew point is less than or equal to 5 percent and less than-30 ℃, closing the opened valve.
The third air inlet valve 13, the first air inlet valve 11, the second air inlet valve 12, the first air outlet valve 31 and the second air outlet valve 32 are sequentially opened, so that cooling medium in the LNG tank truck enters the testing device. When the temperature of the cooling medium detected by the first temperature sensor 15 does not reach the set temperature range or when the temperature of the cooling medium detected by the first temperature sensor 15 reaches the set temperature range, the temperature of the cooling medium detected by the second temperature sensor 16 does not reach the set temperature range, the bypass line air outlet valve 41 and the bypass line air outlet valve 42 are opened by closing the second air inlet valve 12 and the first air outlet valve 31 to directly guide the cooling medium which does not reach the set temperature range to the flare stack. When the temperature of the cooling medium detected by the second temperature sensor 16 reaches the set range, the bypass line air outlet valve 41 and the bypass line air outlet valve 42 are closed, and the second air inlet valve 12 and the first air outlet valve 31 are opened, so that the cooling medium enters the closed container 2, and the closed container 2 is cooled. In this embodiment, the bypass pipeline 4 can be used to accurately adjust the air inlet temperature, and the medium reaching the target temperature is led into the closed container, so as to achieve the purpose of accurately controlling the temperature.
Observing the temperature of the third temperature sensor 26 shows that when the temperature reaches-30 ℃, the second air inlet valve 12 and the first air outlet valve 31 are closed, and when the temperature in the low-temperature device cylinder 22 is stable, the low-temperature device cylinder is kept stand for 10 minutes, and whether an abnormal condition exists is observed and recorded; if no abnormal condition exists, the temperature of the closed container 2 is continuously reduced, and the closed container is kept stand for 10 minutes every 10 ℃ and is observed and recorded whether the abnormal condition exists or not. When the temperature in the closed container 2 reaches the set temperature of minus 130 ℃, the measured element is free from abnormality, and the temperature drop experiment is finished.
2) Liquid injection test
Referring to fig. 2, the air supply line 1 and the closed vessel 2 were further cooled to-140 ℃ using a cooling medium prior to the liquid injection test.
The liquid LNG is slowly introduced into the closed vessel 2, the liquid level in the closed vessel 2 is observed through the observation mirror window 25, and after the liquid level reaches the desired liquid level, the third air intake valve 13 and the second air intake valve 12 are closed, and the liquid injection is stopped. The bypass line outlet valve 41 and the bypass line outlet valve 42 are opened to discharge the liquid in the line to the flare stack. And observing the alarm condition of the liquid level switch, and if the liquid level switch alarms normally, indicating that the alarm function is normal. And opening the first air outlet valve 31 and the second air outlet valve 32, discharging the liquid in the testing device to the flare stack, observing whether the liquid level switch is reset after the liquid in the testing device is emptied, and if the liquid level switch is reset normally, indicating that the liquid level switch has normal reset function and ending the test.
After the test is finished, the LNG tank truck and the flare tower are evacuated, and the pipeline in the test device and the sealing device are subjected to inerting treatment by using nitrogen.
According to the testing device provided by the embodiment, liquefied natural gas or liquid nitrogen and the like can be used as low-temperature mediums, and through the combined design of the corresponding low-temperature hose, the ball valve, the bypass pipeline and the detection instrument, temperature control, pressure control and liquid level control can be realized in the experimental device, and functional verification of common low-temperature components such as a temperature sensor, a pressure sensor, a liquid level switch, a liquid level meter, a safety valve, a breather valve and the like can be realized. The method for testing the embodiment uses the liquid level switch as the component to be tested for testing is only an example. The testing device of the embodiment can perform functional tests on various components applied to low-temperature environments, including but not limited to liquid level switch/sensor functional tests, safety valve calibration, breather valve calibration, thermometer/meter/sensor functional tests, pressure meter/sensor functional tests and the like. In the process of testing other components, the element to be tested can be installed on the installation structure corresponding to the upper end cover of the closed container in the same way, and the temperature of the testing device is reduced by adopting the same method, so that the component to be tested is in a low-temperature environment, and whether the component to be tested has an abnormal condition or not is observed. If no abnormal condition exists, the functional parameters of the component to be tested can be set, for example, the temperature, the pressure and the like in the closed container are changed, and the temperature sensor, the pressure sensor, the thermometer and the pressure gauge are calibrated or tested. Setting critical pressure in the closed container, and when the critical pressure reaches the pressure value, judging whether the safety valve, the breather valve and the like work normally or not. The testing device and the testing method can ensure that each component is normal in function before shipping, so that construction risks are reduced, and construction period is saved.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (13)
1. A test apparatus for testing the function of a component, comprising:
the air supply pipeline comprises an air inlet end and an air outlet end, and sequentially comprises a first position and a second position along the direction from the air inlet end to the air outlet end;
the first temperature sensor is connected with a first position of the air supply pipeline;
the second temperature sensor is connected with a second position of the air supply pipeline;
the closed container is communicated with the air outlet end of the air supply pipeline;
the component to be tested is arranged in the closed container;
the exhaust pipeline is communicated with the closed container so as to exhaust the medium introduced into the closed container;
and one end of the bypass pipeline is communicated with a pipeline at the rear side of the second position of the air supply pipeline, and the other end of the bypass pipeline is communicated with the air exhaust pipeline.
2. The test device of claim 1, wherein the air supply line comprises:
the first air inlet valve is arranged at the air inlet end of the air supply pipeline and is arranged at the front side of the first position;
the second air inlet valve is arranged at the air outlet end of the air supply pipeline and is arranged at the rear side of the second position.
3. The test device of claim 1, wherein the inlet and outlet ends of the bypass line are each provided with a valve.
4. The test device of claim 1, wherein the test device further comprises:
and the third temperature sensor is arranged on the closed container, and a probe of the third temperature sensor extends into the closed container.
5. The test device of claim 1, wherein the test device further comprises:
and the cooling medium supply device is communicated with the air inlet end of the air supply pipeline.
6. The test device of claim 1, wherein the closed container comprises:
a cylinder;
the upper end cover covers the top end of the cylinder body, and is provided with at least one mounting interface for mounting components to be tested;
and the lower end cover covers the bottom end of the cylinder body.
7. The test device of claim 6, wherein the test device further comprises:
the air release valve is arranged on the lower end cover and is communicated with the closed container.
8. The test device of claim 6, wherein the test device further comprises:
and the observation mirror window is arranged on the cylinder body of the closed container.
9. The test device of claim 8, wherein the test device further comprises:
the pressure sensor is arranged at the window of the observation mirror;
and the fourth temperature sensor is arranged at the window of the observation mirror and is arranged at intervals with the pressure sensor.
10. The test device of claim 4, further comprising:
and the control device is in signal connection with the component to be tested, the first temperature sensor, the second temperature sensor, the third temperature sensor, the fourth temperature sensor and the pressure sensor.
11. The test device of claim 1, wherein the component to be tested is one of a temperature sensor, a pressure sensor, a liquid level switch, a liquid level gauge, a safety valve, and a breather valve.
12. The test device of claim 11, wherein the component under test is applied to a gas supply system of a lng ship.
13. A test method, wherein the test method is performed using the test device of claim 4, comprising:
introducing cooling medium into the air supply pipeline of the testing device, and opening the bypass pipeline when the temperature of the cooling medium detected by the second temperature sensor does not reach the set temperature range, so that the introduced cooling medium is led out from the bypass pipeline;
when the temperature of the cooling medium detected by the second temperature sensor reaches a set range, closing the bypass pipeline, and opening an air inlet valve of the closed container to enable the cooling medium to enter the closed container;
stopping introducing the cooling medium when the temperature detected by the third temperature sensor reaches a set temperature range;
functional parameters to be detected by the components to be detected are arranged in the closed container, and whether the components to be detected work normally or not is observed to judge whether the components to be detected are normal or not.
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| CN202310126522.5A CN116358625A (en) | 2023-02-16 | 2023-02-16 | Testing device and method for testing functions of components |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310126522.5A CN116358625A (en) | 2023-02-16 | 2023-02-16 | Testing device and method for testing functions of components |
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| CN116358625A true CN116358625A (en) | 2023-06-30 |
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| CN202310126522.5A Pending CN116358625A (en) | 2023-02-16 | 2023-02-16 | Testing device and method for testing functions of components |
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