CN114061846A - Leakage rate adjustable air tightness detection simulation experiment device and method - Google Patents
Leakage rate adjustable air tightness detection simulation experiment device and method Download PDFInfo
- Publication number
- CN114061846A CN114061846A CN202111221122.XA CN202111221122A CN114061846A CN 114061846 A CN114061846 A CN 114061846A CN 202111221122 A CN202111221122 A CN 202111221122A CN 114061846 A CN114061846 A CN 114061846A
- Authority
- CN
- China
- Prior art keywords
- pressure
- air
- leakage
- connecting piece
- experiment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000004088 simulation Methods 0.000 title claims abstract description 19
- 238000002474 experimental method Methods 0.000 claims abstract description 64
- 238000007789 sealing Methods 0.000 claims abstract description 32
- 239000000344 soap Substances 0.000 claims abstract description 28
- 230000000087 stabilizing effect Effects 0.000 claims description 22
- 238000005259 measurement Methods 0.000 claims description 12
- 230000007613 environmental effect Effects 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 239000003381 stabilizer Substances 0.000 claims description 6
- 239000007789 gas Substances 0.000 description 24
- 239000000463 material Substances 0.000 description 7
- 230000007547 defect Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000001819 mass spectrum Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Images
Classifications
-
- 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
- G01M3/12—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing elastic covers or coatings, e.g. soapy water
-
- 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
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
Abstract
The invention discloses a leakage rate adjustable air tightness detection simulation experiment device and method. The experimental device comprises a pressurizing module, an experimental body and a pressure maintaining module. The experiment body includes flange, connecting piece, sealing washer, bolt and nut. The two flanges are separated by a connecting piece. A plurality of air leakage paths are arranged on one side surface or two side surfaces of the connecting piece. The leak paths are wholly or partially different. And a sealing ring is arranged between the side surface of the connecting piece provided with the air leakage path and the corresponding flange. The inner end of each leakage path extends to the outer side of the sealing ring. An air leakage area is arranged on the sealing ring; the seal ring can be rotationally adjusted in position so that the blow-by area can be aligned with different blow-by paths. The invention simulates the real air leakage condition on equipment, and utilizes the soap bubbles to enable the air leakage condition to be visually observed and measured, thereby obtaining the relationship between the air leakage condition and the soap bubble generation condition of scratches with different types, sizes and positions under different air pressures and other influencing factors.
Description
Technical Field
The invention belongs to the field of air tightness detection of industrial equipment, and particularly relates to a device capable of simulating leakage points of connecting pieces and material bodies with different leakage rates and a using method thereof, in particular to an experimental device for leakage rate detection.
Background
The air tightness is a key technical index of whether a plurality of pressure-bearing and vacuum equipment with tightness requirements, such as a heat exchanger, a refrigerating device, a pressure container and the like, can work normally. Leakage points can be generated when H defects such as welding, riveting, flanges, gaskets, hot (cold) sleeves and threads exist, or material defects such as air holes, slag inclusion, cracks and the like exist in an equipment body, so that the air tightness of the equipment is reduced, and the equipment performance is reduced or even cannot be normally used.
In reality, the existing leakage points are usually related to factors such as improper design, materials, processing technology, installation method and use environment of a connecting surface or a material body, are naturally formed in the manufacturing and use processes of equipment, and have complicated and various shapes and generation reasons and different appearance forms. It is generally difficult to manufacture an indeterminate leak by manual means.
The existing air tightness detection method mainly comprises the following steps: most of airtightness detection methods such as a differential pressure method, a soap bubble method, a pressure water detection method, a flow method, a pressure change method, a chemical element tracing method, a halogen method, a helium mass spectrum and a nitrogen-hydrogen method can measure leakage rate, but a leakage point cannot be accurately positioned, and resources are greatly consumed.
The soap bubble method and the pressure water detection method are the most traditional and most common leak point positioning method so far, and the common method is as follows: filling positive pressure gas into the detected equipment, coating soap liquid with certain concentration on the surface of the detected equipment or immersing the detected equipment into a water tank, and observing whether bubbles are generated on the surface of the detected equipment by a manual visual method or a machine visual method; if the pressure difference is sufficient and the leak point is large, the bubble generation characteristics are obvious, and the leak point can be confirmed. The soap soaking method and the pressure water detection method are simple and easy to implement, safe and reliable, and can determine the location of a leakage point. However, the process of generating, growing and breaking bubbles is limited by the size of a leak source, pressure difference and other factors, when a soap bubble method experiment is carried out, bubbles which are not the cause of the leak source are generated due to the factors and the surrounding environment, which causes great influence and inconvenience on manual visual inspection and machine positioning of the leak source, and the observation of the bubbles is greatly influenced due to the correlation between the leak detection precision of the soap bubble method and the structure of the leak source, the surface characteristics of the bubbles, the concentration, the components, the surface tension and the gravity of soap liquid, the temperature, the pressure, the relative humidity and other complex factors of the environment. Therefore, the research on the generation mechanism of the bubbles has important academic and application values for detecting the airtightness.
In the prior art, experimental equipment for researching the relationship between the soap bubble generation condition and the actual leakage point condition is lacked, so that the further development of a soap bubble method is restricted. Therefore, it is necessary to design an airtight detection simulation experiment device with adjustable leakage rate to help researchers to simply and conveniently simulate the leakage point and leakage rate when the material itself has defects.
Disclosure of Invention
The invention aims to provide an air tightness detection simulation experiment device with adjustable leakage rate and a using method thereof.
The invention relates to an air tightness detection simulation experiment device with adjustable leakage rate, which comprises a pressurizing module, an experiment body and a pressure maintaining module. The pressurizing module is used for pressurizing the experiment body and the pressure maintaining module. The pressure maintaining module is used for continuously providing air pressure for the experiment body in the working process. The experiment body include flange, connecting piece, sealing washer, bolt and nut. The two flanges are separated by a connecting piece. A plurality of air leakage paths are arranged on one side surface or two side surfaces of the connecting piece. The leak paths are wholly or partially different. And a sealing ring is arranged between the side surface of the connecting piece provided with the air leakage path and the corresponding flange. The inner end of each leakage path extends to the outer side of the sealing ring. An air leakage area is arranged on the sealing ring; the seal ring can be rotationally adjusted in position so that the blow-by area can be aligned with different blow-by paths.
Preferably, the pressurizing module comprises a high-pressure air source, a first stop valve, a pressure reducing valve, a first pressure stabilizing container and a second stop valve which are connected in sequence. The pressure maintaining module comprises a third stop valve and a second pressure stabilizing container. An exhaust valve is arranged on the second pressure stabilizing container. The third stop valve is connected to the vent of the second surge tank. The openings at the two ends of the experiment body are respectively connected with the second stop valve and the third stop valve through movable joints.
Preferably, the experimental device further comprises a monitoring module. The monitoring module comprises a first pressure sensor, a second pressure sensor, a third pressure sensor, a first temperature sensor, a data acquisition unit and a computer measurement and control system. The detection port of the first pressure sensor is connected between the pressure reducing valve and the first pressure stabilizing container. And the detection ports of the second pressure sensor and the temperature sensor are connected between the third stop valve and the second pressure stabilizing container. And a detection port of the third pressure sensor is connected with the inner cavity of the second voltage stabilizer. And a second temperature sensor is arranged on the second voltage stabilizer. The first pressure sensor, the second pressure sensor, the third pressure sensor and the first temperature sensor all transmit detection signals to the data acquisition unit. The data collector is communicated with the computer measurement and control system.
Preferably, the monitoring module further comprises an environmental sensor. The environment sensor detects the temperature, humidity and air pressure of the external environment and transmits the temperature, humidity and air pressure to the data acquisition unit.
Preferably, the two flanges are connected by bolts and nuts, and the pressure on the connecting member is adjusted.
Preferably, the cross-sectional shapes of the flange and the connecting piece are the same and are both circular or polygonal.
Preferably, the respective leakage paths on the same side of the connecting member are evenly distributed in the circumferential direction of the central axis of the connecting member.
Preferably, both side surfaces of the connecting piece are provided with air leakage paths; the roughness of the two sides of the connecting piece is different.
Preferably, the sealing ring is arranged in an annular groove formed in the inner side surface of the flange.
The use method of the leakage rate adjustable air tightness detection simulation experiment device comprises the following specific steps:
selecting an air leakage path corresponding to the air leakage condition to be researched from all air leakage paths as an experiment path, and rotating and adjusting the position of a sealing ring to enable an air leakage area on the sealing ring to be connected with the experiment path; adjusting the posture of the experiment body to enable the direction of the experiment path to correspond to the air leakage condition to be researched; and adjusting the pressure of the two flanges to the connecting piece to a state corresponding to the condition of the studied air leakage.
And step two, the pressurizing module pressurizes the experiment body and the pressure maintaining module.
Step three, observing whether the pressure maintaining module has the air tightness problem after the pressurization is finished; if pressurize module gas tightness problem, then scribble the soap lye on the experiment body, the pressurize module provides the air current to the experiment body. And (3) gas in the experiment body leaks from the experiment path to generate soap bubbles, and the relation between the gas leakage condition and the soap bubble generation condition to be researched is obtained.
The invention has the beneficial effects that:
1. according to the invention, the scratches are arranged at the joint of the flange and the connecting piece, so that the real air leakage condition of the equipment is simulated, and the air leakage condition can be visually observed and measured by using the soap bubbles, so that the relationship between the air leakage condition and the soap bubble generation condition of scratches with different types, sizes and positions under different air pressures and other influence factors is obtained, and based on the relationship, the air leakage defect condition in the equipment can be reversely pushed by using the soap bubble growth condition after the soap liquid is smeared at the real air leakage position of the equipment, so that the primary detection of the fault is realized.
2. The invention can deeply research the bubble generation mechanism by researching the bubble generation states under different gravity, pressure, inclination, humidity and temperature, thereby fully preparing for the condition of leak point identification in field operation.
Drawings
FIG. 1 is a system block diagram of a test apparatus provided by the present invention;
FIG. 2 is a schematic cross-sectional view of an experimental body according to the present invention;
fig. 3 is a schematic end view of the connector of the present invention.
Detailed Description
The following will fully and clearly describe the technical solutions of the present invention including but not limited to this type of technical solutions with reference to the accompanying drawings.
As shown in FIG. 1, the experimental apparatus for testing the airtightness with adjustable leakage rate comprises a pressurizing module 1, an experimental body 2, a pressure maintaining module 3 and a monitoring module. The pressurizing module 1 comprises a high-pressure air source 1-1, a first stop valve 1-2, a reducing valve 1-3, a first pressure stabilizing container 1-4 and a second stop valve 1-5 which are connected in sequence. The pressure maintaining module 3 includes a third cut-off valve 3-1 and a second pressure-stabilizing vessel 3-2. An exhaust valve 3-3 is arranged on the second pressure stabilizing container 3-2. The exhaust valve 3-3 is used for rapidly exhausting air after the test is finished, so that the purpose of safely finishing the test is achieved. The third stop valve 3-1 is connected to a vent of the second surge tank 3-2. Openings at two ends of the experiment body 2 are respectively connected with the second stop valve 1-5 and the third stop valve 3-1 through movable joints, so that the installation and disassembly processes are simple while the air tightness is ensured.
The monitoring module comprises a first pressure sensor P1, a second pressure sensor P2, a third pressure sensor P3, a first temperature sensor T1, a data collector U1, an environmental sensor U2 and a computer measurement and control system U3. A detection port of the first pressure sensor P1 is connected between the pressure reducing valve 1-3 and the first surge tank 1-4. The detection ports of the second pressure sensor P2 and the temperature sensor are connected between the third cut-off valve 3-1 and the second surge tank 3-2. The detection port of the third pressure sensor P3 is connected to the internal chamber of the second pressure stabilizer. And a second temperature sensor is arranged on the second voltage stabilizer. The second temperature sensor adopts a glass thermometer and is arranged in a cylindrical groove at the top of the second pressure stabilizing container 3-2. Temperature sensor, pressure sensor and humidity transducer are integrated in environmental sensor U2, and this three group's sensors constitute environmental parameter, calibrate experimental apparatus's data, have ensured the accuracy of experiment. The first pressure sensor P1, the second pressure sensor P2, the third pressure sensor P3, the first temperature sensor T1 and the environmental sensor U2 all transmit detection signals to the data collector U1. Data collector U1 communicates with computer measurement and control system U3. The data acquisition unit U1 is mainly connected with a sensor of the experimental equipment through a data line, and transmits the data acquisition of the sensor to the computer measurement and control system U3, so as to ensure the real-time reading of the experimental parameters of the system. The computer measurement and control system U3 is connected with the data acquisition unit U1 through a data line, and the change condition of parameters in the experimental process is recorded and stored by using a parameter curve simulated by window interface software.
The experiment body 2 comprises a flange 2-1, a connecting piece 2-2, a sealing ring 2-3, a bolt 2-4 and a nut. The two flanges 2-1 are separated by the connecting pieces 2-2, and bolts 2-4 and nuts are arranged at four vertex angles for fixing and are used as a pressure regulating mechanism. Sealing rings 2-3 are arranged between the two side surfaces of the connecting piece 2-2 and the corresponding flanges 2-1. The sealing rings 2-3 are specifically annular rubber sealing rings. The cross sections of the flange 2-1 and the connecting piece 2-2 are the same and are circular or polygonal. The non-contact surface part of the connecting piece 2-2 is manufactured into different roughness degrees, and the connecting piece 2-2 can be made of plastic materials such as metal blocks, plastics, stones and the like; the experiment body 2 is provided with a plurality of positioning pins, so that the position is accurate when the two polygonal or circular flanges 2-1 clamp one polygonal or circular connecting piece 2-2; the connecting piece 2-2 is provided with a through hole; the opposite side surfaces of the two flanges 2-1 are provided with air storage cavities. The through hole on the connecting piece 2-2 is communicated with the gas storage cavities of the two flanges 2-1 to form an experimental cavity 2-6. Two sides of the experiment body 2 are respectively provided with a circular air inlet pipe 2-7 and an air outlet pipe 2-8, and the two air pipes are communicated through an experiment chamber 2-6. The two air pipes are respectively connected with the two flanges 2-1 in a welding mode so as to ensure the sealing property.
The opposite side surfaces of the two flanges 2-1 are respectively provided with an annular groove; the annular groove is used for placing the sealing rings 2-3. The sealing ring 2-3 can be adjusted rotatably in the annular groove. A plurality of air leakage openings are formed in the same area of the side part of the sealing ring 2-3; by rotating the sealing ring 2-3, the air vent can be adjusted to be aligned with different air leakage seams on the connecting piece 2-2, so that the leakage rate and the leakage direction can be effectively controlled. Twelve air leakage paths 2-9 uniformly distributed along the circumferential direction of the central axis of the connecting piece 2-2 are arranged on the two side surfaces of the connecting piece 2-2. The outer end of the air leakage path 2-9 extends to the outer edge of the connecting piece 2-2, and the inner end extends to the experiment chamber 2-6; the specific form of the leakage path 2-9 is a score. The width and shape of the different leakage paths 2-9 are different. Leakage points and leakage rate under different conditions can be simulated by adjusting the pressure of the two flanges 2-1 on the connecting piece 2-2, the air leakage path 2-9 corresponding to the air vent of the sealing ring 2-3 and the orientation of the air leakage port.
The high-pressure gas source 1-1 is provided by a gas compressor, can realize the compression preparation of normal-temperature gas and is mainly responsible for manufacturing a pressure environment inside the container to meet the requirement of a leak point detection method.
The pressure reducing valves 1-3 are used for adjusting the air pressure in the system after pressure stabilization; a first cut-off valve 1-2 between the gas compressor and the pressure reducing valve 1-3 for throttling and cutting off and ensuring gas tightness; and a first pressure gauge positioned between the first pressure stabilizing container 1-4 and the pressure reducing valve 1-3 and used for observing the pressure range. When experimental factors such as gravity, inclination and surface roughness of the device need to be changed, the connection between the movable joint and the second and third stop valves 3-1 can be loosened, and the middle connecting piece 2-2 part is rotated or the rotatable sealing ring of the experimental body 2 is rotated.
The use method of the leakage rate adjustable air tightness detection simulation experiment device comprises the following specific steps:
selecting one air leakage path 2-9 corresponding to the air leakage condition to be researched from the air leakage paths 2-9 as an experiment path, and rotating and adjusting the position of a sealing ring 2-3 to enable each air leakage port on the sealing ring 2-3 to be connected with the experiment path; adjusting the posture of the experiment body 2 to enable the direction of the experiment path to correspond to the condition of the air leakage to be researched; and adjusting the pressure of the two flanges 2-1 to the connecting piece 2-2 to a state corresponding to the air leakage condition to be studied.
At the moment, if the air pressure in the experiment chamber 2-6 is greater than the external standard atmospheric pressure, part of the air can leak out of the small-sized vent hole of the rubber sealing ring and forms air flow after leaking out of the experiment path on the connecting piece 2-2, so that the experiment effect of simulating and researching the air leakage condition is achieved, and the air leakage degree is determined according to soap bubbles generated on the experiment body 2 which is coated with soap liquid in advance.
And secondly, introducing high-pressure gas into the experiment body 2 by using the high-pressure gas source 1-1, wherein the high-pressure gas source 1-1 is provided by a gas compressor, so that the compression preparation of the normal-temperature gas can be realized, and a pressure environment higher than the atmospheric pressure is manufactured for the experiment system. High-pressure gas sequentially passes through a first stop valve 1-2, a reducing valve 1-3, a first pressure sensor P1 and a second stop valve 1-5 and then enters a first pressure stabilizing container 1-4. The stop valve, the pressure reducing valve 1-3 and the pressure sensor are respectively used for maintaining pressure, reading pressure parameters and detecting the air tightness of the device, the soap bubble generation condition at the defect position of the material in a certain pressure range can be conveniently researched, and the pressure reducing valve 1-3 can effectively control the gas quantity sent by a gas compressor, so that the purpose of controlling the leakage rate to a certain degree is achieved;
and step three, introducing high-pressure gas to enable the gas pressure in the experiment chamber 2-6 of the experiment body 2 and the second pressure stabilizing container 3-2 to be continuously increased. Because of the air pressure effect, the air continuously moves towards the part with small air pressure in the device, and when the pressure environment in the system reaches a set value, the high-pressure air source 1-1 and all the stop valves are closed, so that the experiment body 2 and the two pressure stabilizing containers are disconnected.
And step four, standing the experimental device for 2 hours, observing the data condition of the computer measurement and control system U3, observing whether the air pressure change of the second pressure container exceeds a set value, if so, indicating that the whole air tightness of the experimental device is poor, checking the air tightness repair problem of the experimental device, and carrying out the second and third tests again. If the pressure does not exceed the preset pressure, after the soap liquid is coated on the experiment body 2, the third stop valve 3-1 is opened to lead the gas in the second pressure stabilizing container 3-2 to be introduced into the experiment body 2 to start the experiment.
Step five, high-pressure gas enters the experiment body 2 through the second pressure stabilizing container 3-2, and the experiment path of the experiment body 2 starts to leak gas; because the experiment body 2 is coated with the soap liquid, soap bubbles are generated in the experiment path; therefore, the relationship between the air leakage condition and the soap bubble generation condition of scratches with different types, sizes and positions under different air pressures and other influencing factors is obtained.
Meanwhile, the second pressure sensor P2 and the first temperature sensor T1 start to detect the air pressure and temperature in the pipeline between the experiment body 2 and the second surge vessel 3-2, and the two transmit the read pressure and temperature parameters to the data acquisition unit U1 through data lines, so as to obtain the relationship curve between the pressure change of the second surge vessel 3-2 and the gas leakage.
The environmental sensor U2 detects ambient temperature, pressure and humidity, and the three constitutes environmental variable, sends into computer measurement and control system U3 with data through data acquisition unit U1 for the data of experimental facilities have the accuracy. The computer measurement and control system U3 simulates discretization parameter curve by using interface software, records and stores the parameter variation condition in the experiment process, reads the air pressure and temperature change condition in the experiment device, generates the parameter log in the experiment process, and records the influence condition on the leakage rate under different pressure, temperature and humidity environments.
Data detected by the third pressure sensor P3 and the second temperature sensor on the second pressure stabilizing container 3-2 enter the computer measurement and control system U3 through the data acquisition unit U1, so that the air pressure and the system temperature inside the current system can be known more accurately, the accuracy and the safety of the experimental process can be ensured, and the risk caused by overhigh pressure can be prevented.
And step six, after the experiment is finished, opening an exhaust valve 3-3 on the second pressure stabilizing container 3-2, and quickly decompressing the second pressure stabilizing container 3-2, so that the experiment is safely and quickly finished.
Claims (10)
1. A leakage rate adjustable air tightness detection simulation experiment device comprises a pressurizing module (1), an experiment body (2) and a pressure maintaining module (3); the method is characterized in that: the pressurizing module (1) is used for pressurizing the experiment body (2) and the pressure maintaining module (3); the pressure maintaining module (3) is used for continuously providing air pressure for the experiment body (2) in the working process; the experiment body (2) comprises a flange (2-1), a connecting piece (2-2), a sealing ring (2-3), a bolt (2-4) and a nut; the two flanges (2-1) are separated by a connecting piece (2-2); a plurality of air leakage paths (2-9) are arranged on one side surface or two side surfaces of the connecting piece (2-2); the leakage paths (2-9) are all or partially different; a sealing ring is arranged between the side surface of the connecting piece (2-2) provided with the air leakage path (2-9) and the corresponding flange (2-1); an air leakage area is arranged on the sealing ring (2-3); the sealing rings (2-3) can be rotated to adjust the position, so that the leakage air area can be aligned with different leakage air paths (2-9).
2. The airtightness detection simulation experiment device with the adjustable leakage rate according to claim 1, wherein: the pressurization module (1) comprises a high-pressure air source (1-1), a first stop valve (1-2), a pressure reducing valve (1-3), a first pressure stabilizing container (1-4) and a second stop valve (1-5) which are connected in sequence; the pressure maintaining module (3) comprises a third stop valve (3-1) and a second pressure stabilizing container (3-2); an exhaust valve (3-3) is arranged on the second pressure stabilizing container (3-2); the third stop valve (3-1) is connected to the vent of the second pressure stabilizing container (3-2); openings at two ends of the experiment body (2) are respectively connected with the second stop valve (1-5) and the third stop valve (3-1) through movable joints.
3. The airtightness detection simulation experiment device with the adjustable leakage rate according to claim 2, wherein: the device also comprises a monitoring module; the monitoring module comprises a first pressure sensor (P1), a second pressure sensor (P2), a third pressure sensor (P3), a first temperature sensor (T1), a data acquisition unit (U1) and a computer measurement and control system (U3); a detection port of the first pressure sensor (P1) is connected between the pressure reducing valve (1-3) and the first pressure stabilizing container (1-4); the detection ports of the second pressure sensor (P2) and the temperature sensor are connected between the third stop valve (3-1) and the second pressure-stabilizing container (3-2); the detection port of the third pressure sensor (P3) is connected with the inner cavity of the second voltage stabilizer; a second temperature sensor is arranged on the second voltage stabilizer; the first pressure sensor (P1), the second pressure sensor (P2), the third pressure sensor (P3) and the first temperature sensor (T1) all transmit detection signals to the data collector (U1); the data collector (U1) is communicated with the computer measurement and control system (U3).
4. The airtightness detection simulation experiment device with the adjustable leakage rate according to claim 3, wherein: the monitoring module further comprises an environmental sensor (U2); the environment sensor (U2) detects the temperature, humidity and air pressure of the external environment and transmits the temperature, humidity and air pressure to the data collector (U1).
5. The airtightness detection simulation experiment device with the adjustable leakage rate according to claim 1, wherein: the two flanges (2-1) are connected through bolts and nuts, and the pressure on the connecting piece (2-2) is adjusted.
6. The airtightness detection simulation experiment device with the adjustable leakage rate according to claim 1, wherein: the cross sections of the flange (2-1) and the connecting piece (2-2) are the same in shape and are circular or polygonal.
7. The airtightness detection simulation experiment device with the adjustable leakage rate according to claim 1, wherein: each air leakage path (2-9) on the same side surface of the connecting piece (2-2) is uniformly distributed along the circumferential direction of the central axis of the connecting piece (2-2).
8. The airtightness detection simulation experiment device with the adjustable leakage rate according to claim 1, wherein: air leakage paths (2-9) are arranged on two side surfaces of the connecting piece (2-2); the roughness of the two sides of the connecting piece (2-2) is different.
9. The airtightness detection simulation experiment device with the adjustable leakage rate according to claim 1, wherein: the sealing ring is arranged in an annular groove formed in the inner side surface of the flange (2-1).
10. A leakage rate adjustable air tightness detection simulation experiment method is characterized in that: the leakage rate adjustable airtightness detection simulation experiment device according to any one of claims 1 to 9; the method comprises the following specific steps:
selecting an air leakage path (2-9) corresponding to the air leakage condition to be researched from the air leakage paths (2-9) as an experiment path, and rotationally adjusting the position of a sealing ring (2-3) to enable an air leakage area on the sealing ring (2-3) to be connected with the experiment path; adjusting the posture of the experiment body (2) to enable the direction of the experiment path to correspond to the air leakage condition to be researched; adjusting the pressure of the two flanges (2-1) to the connecting piece (2-2) to a state corresponding to the condition of the studied air leakage;
step two, the pressurizing module (1) pressurizes the experiment body (2) and the pressure maintaining module (3);
thirdly, observing whether the pressure maintaining module (3) has the air tightness problem after the pressurization is finished; if the pressure maintaining module (3) has the problem of air tightness, smearing soap liquid on the experiment body (2), and providing air flow for the experiment body (2) by the pressure maintaining module (3); the gas in the experiment body (2) leaks from the experiment path to generate soap bubbles, and the relation between the gas leakage condition and the soap bubble generation condition is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111221122.XA CN114061846B (en) | 2021-10-20 | Leakage rate-adjustable air tightness detection simulation experiment device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111221122.XA CN114061846B (en) | 2021-10-20 | Leakage rate-adjustable air tightness detection simulation experiment device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114061846A true CN114061846A (en) | 2022-02-18 |
| CN114061846B CN114061846B (en) | 2024-05-17 |
Family
ID=
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009251335A (en) * | 2008-04-08 | 2009-10-29 | Mitsubishi Materials Corp | Fluid leakage simulator |
| CN202731900U (en) * | 2012-07-23 | 2013-02-13 | 中国石油化工股份有限公司 | Simulating loss device |
| CN109140249A (en) * | 2018-10-12 | 2019-01-04 | 中国海洋石油集团有限公司 | A kind of submerged structure gas leakage simulator |
| CN109653729A (en) * | 2018-12-14 | 2019-04-19 | 中海石油(中国)有限公司 | A kind of wellbore assembly tiny leakage circulation seal analoging detecting device and method |
| CN110206905A (en) * | 2019-06-20 | 2019-09-06 | 固安沃克流体控制有限公司 | Pipeline A leakage valve |
| CN110911021A (en) * | 2019-12-05 | 2020-03-24 | 上海核工程研究设计院有限公司 | Function verification test loop system of nuclear process pipeline leakage rate detection device |
| CN112265658A (en) * | 2020-10-22 | 2021-01-26 | 北京卫星环境工程研究所 | Spacecraft on-orbit fuel storage box leakage and residual amount detection simulation test system |
| CN112733312A (en) * | 2019-10-10 | 2021-04-30 | 中国石油化工股份有限公司 | Natural gas gathering and transportation pipeline leakage simulation device and simulation method |
| CN113432802A (en) * | 2021-06-28 | 2021-09-24 | 南通理工学院 | Multipurpose low temperature container part leak rate detection simulator |
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009251335A (en) * | 2008-04-08 | 2009-10-29 | Mitsubishi Materials Corp | Fluid leakage simulator |
| CN202731900U (en) * | 2012-07-23 | 2013-02-13 | 中国石油化工股份有限公司 | Simulating loss device |
| CN109140249A (en) * | 2018-10-12 | 2019-01-04 | 中国海洋石油集团有限公司 | A kind of submerged structure gas leakage simulator |
| CN109653729A (en) * | 2018-12-14 | 2019-04-19 | 中海石油(中国)有限公司 | A kind of wellbore assembly tiny leakage circulation seal analoging detecting device and method |
| CN110206905A (en) * | 2019-06-20 | 2019-09-06 | 固安沃克流体控制有限公司 | Pipeline A leakage valve |
| CN112733312A (en) * | 2019-10-10 | 2021-04-30 | 中国石油化工股份有限公司 | Natural gas gathering and transportation pipeline leakage simulation device and simulation method |
| CN110911021A (en) * | 2019-12-05 | 2020-03-24 | 上海核工程研究设计院有限公司 | Function verification test loop system of nuclear process pipeline leakage rate detection device |
| CN112265658A (en) * | 2020-10-22 | 2021-01-26 | 北京卫星环境工程研究所 | Spacecraft on-orbit fuel storage box leakage and residual amount detection simulation test system |
| CN113432802A (en) * | 2021-06-28 | 2021-09-24 | 南通理工学院 | Multipurpose low temperature container part leak rate detection simulator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2938055Y (en) | Device for detecting leakage of central air-conditioning pipeline system by differential pressure | |
| CN201965006U (en) | Lithium ion battery differential pressure formula leak hunting device | |
| CN205655969U (en) | Device that leaks in simulation gas valve | |
| CN204064622U (en) | A kind of thermocycling and air-tightness detection device | |
| CN110749434A (en) | System and method for testing pressure maintaining characteristic of pressure maintaining cabin of coring device | |
| CN109443662A (en) | A kind of fluidic medium valve tiny leakage test device and method | |
| CN113720555A (en) | Device and method for detecting internal leakage of ball valve of oil and gas pipeline | |
| CN202066654U (en) | Air-tightness measurement device | |
| CN204479250U (en) | A kind of gas meter, flow meter gas transmission state seal performance pick-up unit | |
| CN209589386U (en) | A kind of full-automatic air tightness detecting system of frock clamp | |
| CN114061846B (en) | Leakage rate-adjustable air tightness detection simulation experiment device and method | |
| CN206362506U (en) | The anhydrous pressure testing device of ball valve | |
| CN114061846A (en) | Leakage rate adjustable air tightness detection simulation experiment device and method | |
| CN109916568A (en) | Electric machine controller sealing propertytest system, device and method | |
| CN108072499A (en) | A kind of bilayer air-conditioner pipe air tightness detection system and method | |
| JPH10185749A (en) | Method and apparatus for leak inspection | |
| CN112304534A (en) | Oil casing pipe simulation sealing test device and test method | |
| CN207556764U (en) | A kind of simulation leak test formula valve seat insert band leakproofness measuring device | |
| CN106092754B (en) | A kind of liquefied petroleum gas steel cylinder water test unit and method | |
| CN209247278U (en) | A kind of fluidic medium valve tiny leakage test device | |
| CN107966252A (en) | A kind of leakage amount detector of micrometeor air seal | |
| CN210005185U (en) | Sealing performance testing system of tidal current energy generator set | |
| CN208672238U (en) | Can handling with pressure online leakage monitoring equipment | |
| CN216524632U (en) | Infrared detector dewar assembly leak detection device | |
| CN219798736U (en) | Pressure on-line monitoring test device under low temperature |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |