CN114427936A - Mechanical seal leakage simulation experiment device - Google Patents
Mechanical seal leakage simulation experiment device Download PDFInfo
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- CN114427936A CN114427936A CN202011183500.5A CN202011183500A CN114427936A CN 114427936 A CN114427936 A CN 114427936A CN 202011183500 A CN202011183500 A CN 202011183500A CN 114427936 A CN114427936 A CN 114427936A
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- 238000004088 simulation Methods 0.000 title claims abstract description 23
- 238000001514 detection method Methods 0.000 claims abstract description 78
- 238000002474 experimental method Methods 0.000 claims abstract description 53
- 230000003287 optical effect Effects 0.000 claims abstract description 30
- 239000007788 liquid Substances 0.000 claims description 76
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 37
- 238000006073 displacement reaction Methods 0.000 claims description 15
- 238000001035 drying Methods 0.000 claims description 5
- 238000004458 analytical method Methods 0.000 abstract description 6
- 238000009792 diffusion process Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 12
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- 238000007789 sealing Methods 0.000 description 6
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- 238000004364 calculation method Methods 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000000429 assembly Methods 0.000 description 4
- 230000000712 assembly Effects 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 241001510071 Pyrrhocoridae Species 0.000 description 3
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- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/85—Investigating moving fluids or granular solids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/85—Investigating moving fluids or granular solids
- G01N2021/8578—Gaseous flow
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Abstract
The invention provides a mechanical seal leakage simulation experiment device, which comprises a gas leakage detection assembly, wherein the gas leakage detection assembly comprises: an air compressor; the gas buffer cavity is internally provided with a coil pipe extending along the axial direction, and the inlet of the coil pipe is communicated with an air compressor; the gaseous chamber of observing, inside is provided with gaseous experiment pipe, leak detection subassembly and optical sensor, the entry of gaseous experiment pipe and the export intercommunication of coil pipe, leak detection subassembly can set up in gaseous observation intracavity with removing, and leak the leakage hole that is provided with a plurality of intervals setting and diameter crescent on the leak detection subassembly, the export of gaseous experiment pipe can selectively with arbitrary leakage hole cooperation butt, optical sensor fixes the exit position of one side inner wall in gaseous observation chamber and towards gaseous experiment pipe. The leakage amount is controlled by controlling the leakage detection assembly, the gas flow diffusion track is obtained by the optical sensor, and signals are transmitted to a computer for analysis, so that the purposes of judging the leakage amount and the leakage degree are achieved.
Description
Technical Field
The invention relates to the field of sealing leakage detection, in particular to a mechanical sealing leakage simulation experiment device.
Background
The existing common leakage detection methods for the mobile equipment of the refinery enterprise comprise a pressure drop method, an acoustic emission technology, a drainage method and a bubble method, but have certain limitations. For example, the pressure drop method is sensitive to temperature change and measurement errors due to the small leakage rate of mechanical seal gas, and the experiment requires long time; acoustic emission techniques can only detect the location of the leak point, but cannot quantitatively detect the degree of leakage; the drainage method and the bubble method adopt a direct measurement method, and have larger errors. In addition, the currently adopted video monitoring technology is only to carry out video observation, the sealing leakage can not be judged quickly basically, and the sealing leakage can be realized by manual intervention, so that the time and the labor are wasted, and the judgment is easy to miss.
Disclosure of Invention
The invention provides a mechanical seal leakage simulation experiment device, which aims to achieve the purpose of judging the leakage degree.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a mechanical seal simulation leakage experiment device, includes gas leakage detection subassembly, and gas leakage detection subassembly includes: an air compressor; the gas buffer cavity is internally provided with a coil pipe extending along the axial direction, and the inlet of the coil pipe is communicated with an air compressor; the gaseous chamber of observing, inside is provided with gaseous experiment pipe, leak detection subassembly and optical sensor, the entry of gaseous experiment pipe and the export intercommunication of coil pipe, leak detection subassembly can set up in gaseous observation intracavity with removing, and leak the leakage hole that is provided with a plurality of intervals setting and diameter crescent on the leak detection subassembly, the export of gaseous experiment pipe can selectively with arbitrary leakage hole cooperation butt, optical sensor fixes the exit position of one side inner wall in gaseous observation chamber and towards gaseous experiment pipe.
Further, the leakage detection assembly is of a rectangular plate-shaped structure, a plurality of leakage holes are arranged at intervals along the length direction of the rectangular plate-shaped structure, a displacement sensor is arranged outside the gas observation cavity, and the displacement sensor is connected with the upper end of the leakage detection assembly and can control the outlet of any leakage hole to be matched and abutted with the outlet of the gas experiment pipe.
Further, the air compressor is connected with the gas buffer cavity through a first branch, and a filter, a main switch, a first-stage pressure reducing valve, a second-stage pressure reducing valve, a stop valve, an electromagnetic valve, a drying pipe, a quick connector and a flow sensor are sequentially arranged on the first branch.
Further, the mechanical seal leakage simulation experiment device further comprises a second branch and a gas storage, an inlet of the second branch is located between the filter and the main switch, and an outlet of the second branch is connected with the gas storage.
Further, a discharge valve is arranged on the second branch.
Further, the mechanical seal leakage simulation experiment device further comprises a third branch, an inlet of the third branch is located between the stop valve and the electromagnetic valve, and an outlet of the third branch is connected with the gas storage.
Furthermore, a pressure maintaining valve and an unloading valve are arranged on the third branch circuit, an inlet of the pressure maintaining valve is connected with the stop valve, a first outlet of the pressure maintaining valve is connected with the gas storage device, a second outlet of the pressure maintaining valve is connected with an inlet of the unloading valve, and an outlet of the unloading valve is connected with the gas storage device.
Further, the bottom in gaseous observation chamber is provided with the gas vent, and mechanical seal simulation leakage experimental apparatus still includes the fourth branch road, and gas vent and gas reservoir are connected respectively to the both ends of fourth branch road.
Further, mechanical seal simulation leakage experimental apparatus still includes liquid leakage detection subassembly, and liquid leakage detection subassembly includes: a centrifugal pump; the inlet of the liquid buffer cavity is communicated with the centrifugal pump; the liquid observes the chamber, and inside is provided with liquid experiment pipe, leak detection subassembly and optical sensor, the entry of liquid experiment pipe and the export intercommunication in liquid cushion chamber are provided with a plurality of intervals on the leak detection subassembly and set up and the diameter leakage hole of crescent, and the export of liquid experiment pipe can choose to leak the hole cooperation butt with arbitrary, and optical sensor fixes the exit position who observes one side inner wall in chamber and towards liquid experiment pipe at liquid observation.
Further, the leakage detection assembly is of a rectangular plate-shaped structure, a plurality of leakage holes are arranged at intervals along the length direction of the rectangular plate-shaped structure, a displacement sensor is arranged outside the gas observation cavity, and the displacement sensor is connected with the upper end of the leakage detection assembly and can control the outlet of any leakage hole to be matched and abutted with the outlet of the gas experiment pipe.
Furthermore, a water inlet control valve and a flow sensor are sequentially arranged on a connecting pipeline between the centrifugal pump and the liquid buffer cavity.
Furthermore, the mechanical seal leakage simulation experiment device also comprises a water storage tank, an inlet is connected with the liquid outlet hole of the liquid buffer cavity and the liquid outlet hole of the liquid observation cavity, and an outlet of the water storage tank is connected with an inlet of the flow sensor through a circulating pipeline.
Further, a circulating pump and a circulating water control valve are sequentially arranged on the circulating pipeline.
The gas leakage detection device has the advantages that when gas enters the gas observation cavity, the leakage amount is controlled by controlling the leakage detection assembly, the gas flow diffusion track is obtained by the optical sensor, and then signals are transmitted to the computer for analysis and calculation, so that the purposes of judging the leakage amount and the leakage degree are achieved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of a gas leak detection assembly according to an embodiment of the present invention;
FIG. 2 is a front view of a gas leak detection assembly in an embodiment of the present invention;
FIG. 3 is a side view of a gas leak detection assembly in an embodiment of the present invention;
FIG. 4 is a schematic diagram of the gas buffer chamber and the gas observation chamber of the gas leak detection assembly in an embodiment of the present invention;
FIG. 5 is a schematic view of a leak detection assembly in an embodiment of the present invention;
FIG. 6 is a schematic structural view of a liquid leak detection assembly according to an embodiment of the present invention;
FIG. 7 is a front view of a liquid leak detection assembly in an embodiment of the present invention;
FIG. 8 is a side view of a liquid leak detection assembly in an embodiment of the present invention;
FIG. 9 is a schematic structural view of a liquid buffer chamber and a liquid observation chamber of the liquid leak detection assembly in the embodiment of the present invention;
FIG. 10 is a schematic structural diagram of a mechanical seal leakage simulation experiment device;
FIG. 11 is a flow chart of a seal leakage monitoring and locating method in an embodiment of the invention.
Reference numbers in the figures: 1. an air compressor; 2. a filter; 3. a master switch; 4. a discharge valve; 5. a primary pressure reducing valve; 6. a first pressure sensor; 7. a secondary pressure reducing valve; 8. a stop valve; 9. an unloading valve; 10. a pressure maintaining valve; 11. a pressure sensor; 12. a first solenoid valve; 13. a drying tube; 14. a quick connector; 15. a first flow sensor; 16. a gas buffer chamber; 17. a second pressure sensor; 18. a gas observation cavity; 19. a third pressure sensor; 20. a second solenoid valve; 21. a gas reservoir; 22. a ball valve; 23. a fourth pressure sensor; 24. a main body experiment cabinet; 25. a coil pipe; 26. an external test tube; 27. a gas test tube; 28. a leak detection assembly; 29. a displacement sensor; 30. an optical sensor; 31. cleaning the joint with water; 32. a centrifugal pump; 33. a water inlet control valve; 34. a circulating water control valve; 35. a second flow sensor; 36. a third flow sensor; 37. a liquid buffer chamber; 38. a third electromagnetic valve; 39. a liquid observation chamber; 40. a fourth solenoid valve; 41. a water storage tank; 42. a circulation pump; 43. a liquid test tube; 44. a water inlet; 45. an air inlet; 46. a bolt; 47. a rubber seal ring; 48. locking the bolt; 49. a quick-release flange; 50. a safety pressure relief device; 51. adjusting the bracket; 52. a detachable rear cover plate; 53. a power line and a signal line; 54. adjusting a rod; 55. a support bar; 56. an exhaust port; 57. a support; 58. a water outlet; 59. a water outlet; 60. an adjustable support; 61. a stainer.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1 to 10, an embodiment of the present invention provides a mechanical seal simulated leakage experimental apparatus, which includes a gas leakage detection assembly, wherein the gas leakage detection assembly includes an air compressor 1, a gas buffer chamber 16 and a gas observation chamber 18. An axially extending coil 25 is provided in the gas buffer chamber 16, and an inlet of the coil 25 is in communication with the air compressor 1. The gas observation cavity 18 is internally provided with a gas experiment pipe 27, a leakage detection assembly 28 and an optical sensor 30, the inlet of the gas experiment pipe 27 is communicated with the outlet of the coil pipe 25, the leakage detection assembly 28 can be movably arranged in the gas observation cavity 18, the leakage detection assembly 28 is provided with a plurality of leakage holes which are arranged at intervals and have gradually increased diameters, the outlet of the gas experiment pipe 27 can be selectively matched and abutted with any leakage hole, and the optical sensor 30 is fixed on the inner wall of one side of the gas observation cavity 18 and faces to the outlet of the gas experiment pipe 27.
When gas enters the gas observation cavity 18, the leakage amount is controlled by controlling the leakage detection assembly 28, meanwhile, the gas flow diffusion track is obtained by the optical sensor 30, and then signals are transmitted to a computer for analysis and calculation, so that the purposes of judging the leakage amount and the leakage degree are achieved. The leakage detection assembly 28 is of a rectangular plate-shaped structure, a plurality of leakage holes are arranged at intervals along the length direction of the rectangular plate-shaped structure, a displacement sensor 29 is arranged outside the gas observation cavity 18, and the displacement sensor 29 is connected with the upper end of the leakage detection assembly 28 and can control the matching and abutting of any leakage hole and the outlet of the gas experiment pipe 27. FIG. 5 illustrates two different sizes of leak detection assemblies 28, where the two different sizes of leak detection assemblies 28 may be selected according to different operating requirements.
The air compressor 1 is connected with the gas buffer cavity 16 through a first branch, and the first branch is sequentially provided with a filter 2, a main switch 3, a primary pressure reducing valve 5, a secondary pressure reducing valve 7, a stop valve 8, a first electromagnetic valve 12, a drying pipe 13, a quick-connection connector 14 and a first flow sensor 15. The mechanical seal leakage simulation experiment device further comprises a second branch and a gas storage 21, wherein the inlet of the second branch is located between the filter 2 and the main switch 3, and the outlet of the second branch is connected with the gas storage 21. The second branch is provided with a discharge valve 4.
The method comprises the following specific steps: the outlet end pipeline of the air compressor 1 is connected with a filter 2, the rear end of the filter 2 is provided with two branches, wherein a first branch flows to an experimental device through a main switch 3, a second branch enters a gas storage 21 through a discharge valve 4, the rear end pipeline of the main switch 3 is sequentially connected with a primary pressure reducing valve 5, a first pressure sensor 6, a secondary pressure reducing valve 7 and a stop valve 8, the rear end of the stop valve 8 is provided with two branches, one branch continuously keeps the same direction as the first branch and flows to the experimental device through a first electromagnetic valve 12, the other branch (namely, a third branch) enters the gas storage 21 through a pressure stabilizing valve 10 and an unloading valve 9, the rear end pipeline of the first electromagnetic valve 12 is sequentially connected with a drying pipe 13, a quick-plugging joint 14 and a first flow sensor 15, the rear end pipeline of the first flow sensor 15 enters a coil pipe 25 in a gas buffering cavity 16 through a gas inlet 45, the rear end of the coil pipe 25 is connected with an external experimental pipe 26, set up second pressure sensor 17 on the outside experiment pipe 26, the rear end of outside experiment pipe 26 links to each other with inside experiment pipe 27, inside experiment pipe 27 links to each other with the leak detection subassembly 28 in the gaseous observation chamber 18, leak detection subassembly 28 upper portion sets up displacement sensor 29 control leakage quantity size, gaseous observation chamber 18 lower part sets up gas vent 56, set gradually third pressure sensor 19 on the fourth of gas vent 56 rear end, second solenoid valve 20, link to each other with gas reservoir 21 at last.
It should be noted that an inlet of the pressure maintaining valve 10 is connected with the stop valve 8, a first outlet of the pressure maintaining valve 10 is connected with the gas reservoir 21, a second outlet of the pressure maintaining valve 10 is connected with an inlet of the unloading valve 9, and an outlet of the unloading valve 9 is connected with the gas reservoir 21.
Further, the side of the gas reservoir 21 opposite to the fourth branch is provided with a ball valve 22 and a fourth pressure sensor 23.
The pressure reduction is carried out by arranging two-stage pressure reducing valves, so that the pressure of the air inlet pipe can be greatly reduced, and meanwhile, the unloading valve 9 and the pressure stabilizing valve 10 are arranged on the pipeline, so that the air pressure of the air inlet pipe can reach a safe and stable state in a branch drainage mode. Through stop valve 8 and the 12 many valves cooperation control pipelines of first solenoid valve, the fault-tolerant rate of pipeline has not only been improved in many valves cooperation control, still examines the maintenance for dismantling and provides convenient.
Further, the front end of the gas buffering cavity 16 is provided with a gas inlet 45, the lower end mounting bracket 57 is arranged, the rear end of the gas buffering cavity 16 is connected with the external experiment pipe 26, the gas buffering cavity 16 entering and exiting is provided with a bolt 46 and a rubber sealing ring 47, the two ends of the external experiment pipe 26 are provided with quick-release flanges 49, the rear end of the gas buffering cavity is provided with a stainer 61, the stainer 61 is connected with the internal experiment pipe 27 in the gas observation cavity 18, the upper part of the gas observation cavity 18 is provided with a safety pressure relief device 50, and the safety pressure relief device 50 is fixed through a locking bolt 48. The lower end of the gas observation cavity 18 is provided with an exhaust port 56, the rear end is provided with a detachable rear cover plate 52, the detachable rear cover plate 52 is provided with an adjusting bracket 51, an adjustable rod 54 and a support rod 55 are arranged to adjust the angle, the adjusting bracket 51 is provided with an optical sensor 30, and the rear end of the optical sensor 30 is connected with a power line and a signal line 53.
As shown in fig. 6 to 9, the mechanical seal simulated leakage experimental apparatus further comprises a liquid leakage detection assembly, and the liquid leakage detection assembly comprises a centrifugal pump 32, a liquid buffer chamber 37 and a liquid observation chamber 39. The inlet of the liquid buffer chamber 37 communicates with the centrifugal pump 32. Liquid experiment pipe 43, leak testing subassembly 28 and optical sensor 30 are provided with to the inside of liquid observation chamber 39, and the entry of liquid experiment pipe 43 communicates with the export of liquid buffer chamber 37, is provided with the leak detection hole that a plurality of intervals set up and diameter crescent on the leak testing subassembly 28, and the export of liquid experiment pipe 43 can be optionally with arbitrary leak hole cooperation butt, and optical sensor 30 fixes the exit position of observing the one side inner wall of chamber 39 and towards liquid experiment pipe 43 at liquid.
When liquid enters the liquid observation cavity 39, the leakage amount is controlled by controlling the leakage detection assembly 28, and meanwhile, the liquid flow diffusion track is obtained through the optical sensor 30, and then signals are transmitted to a computer for analysis and calculation, so that the purposes of judging the leakage amount and the leakage degree are achieved.
In this embodiment, the leak detection module 28 is the same as the leak detection module 28 in the gas leak detection module in structure, and is a rectangular plate-shaped structure, a plurality of leak holes are arranged at intervals along the length direction of the rectangular plate-shaped structure, a displacement sensor 29 is arranged outside the gas observation cavity 18, and the displacement sensor 29 is connected with the upper end of the leak detection module 28 and can control the matching and abutting of any leak hole and the outlet of the liquid experiment tube 43. FIG. 5 illustrates two different sizes of leak detection assemblies 28, where the two different sizes of leak detection assemblies 28 may be selected according to different operating requirements.
As shown in fig. 6, the front end pipe of the centrifugal pump 32 of the liquid leakage detecting assembly is connected to a water tank, the rear end pipe is connected to a water inlet control valve 33, the rear end pipe of the water inlet control valve 33 has two branches, one branch is connected to a circulating pump 42 through a circulating water control valve 34, the other branch enters a liquid buffer chamber 37 through a second flow sensor 35, one end of the liquid buffer chamber 37 is provided with a water inlet 44, one end is connected to a liquid experimental pipe 43, the lower end of the liquid buffer chamber 37 is provided with a water outlet 58, the water outlet 58 is connected to a water storage tank 41 through a pipe, and the pipe is provided with a third electromagnetic valve 38 and a third flow sensor 36, the liquid experimental pipe 43 is connected to a liquid observing chamber 39, the rear end outlet thereof is provided with the leakage detecting assembly 28, the upper portion of the leakage detecting assembly 28 is provided with a displacement sensor 29 for controlling the amount, the lower portion of the liquid observing chamber 39 is provided with a water outlet 59, the drain 59 is provided with a fourth electromagnetic valve 40 connected with the water storage tank 41, the upper part of the water storage tank 41 is provided with a water filling port, and the lower part is provided with a pipeline connected with the circulating pump 42.
Wherein, a connection pipeline for connecting the water cleaning joint 31 is provided between the circulating water control valve 34 and the circulating pump 42.
Further, the front end of the liquid buffer chamber 37 in the liquid leakage detection assembly is provided with a water inlet 44, the lower end is provided with a water outlet 58 which is connected with the water storage tank 41 through a pipeline, the lower end is provided with a support 57, the rear end is connected with the liquid experiment tube 43, the rear end of the liquid experiment tube 43 is connected with the leakage detection assembly 28 in the liquid observation chamber 39, the upper part of the liquid observation chamber 39 is provided with an adjustable support 60, and the adjustable support 60 is provided with the optical sensor 30.
Preferably, the lowest point of the water inlet pipe of the liquid leakage detection assembly is provided with a drain valve, so that liquid in the experimental device can be drained after the experiment is finished; when the device is powered on, after the liquid in the water storage tank 41 reaches a certain height, the circulating pump 42 can be switched on to make the water circularly flow, and the centrifugal pump 32 is switched off, thereby saving the water consumption.
It should be noted that, as shown in fig. 10, in the embodiment of the present invention, the liquid leakage detection module and the gas leakage detection module are disposed in the same main body experiment cabinet 24 at intervals, the main body experiment cabinet 24 covers the whole experiment apparatus with an explosion-proof cover, explosion-proof films are attached to the left side plate, the right side plate, and the surface of the observation plate, and the back plate is set as a vent plate. Once high pressure bursts, the safety of operators can be effectively ensured through the ventilation of the back plate.
As shown in fig. 11, the present invention further provides a method for monitoring and positioning a seal leakage, which comprises the following steps: selecting leakage monitoring points according to the installation conditions and the initial positions, installing a video monitoring camera, collecting video signals of the monitoring points, performing gray level compression processing on each frame image of the video stream, calculating the gray level difference value of the current frame and the background frame, and obtaining a corresponding gray level difference value filter matrix. Setting a threshold value of the image recognition sensitivity, comparing the gray difference filtering matrix with the threshold value, and if a point which is larger than the detection threshold value exists in the gray difference filtering matrix, determining the corresponding position as a leakage point; if the gray difference filtering matrix does not have a point larger than the detection threshold and the updating time of the background frame is up, setting the current frame as the background frame, then setting the next frame as the current frame, and repeating the steps; if the gray difference filtering matrix does not have a point larger than the detection threshold and the updating time of the background frame is not up, the background frame is kept unchanged, the next frame is set as the current frame, and the steps are continuously repeated. Through carrying out above-mentioned processing to video signal, realize leaking monitoring and accurate location to mechanical seal.
The method fully considers the field working conditions (including equipment layout, external interference and the like) of the equipment, takes the image of the optical sensor in the device as a reference, takes the optical sensor outside the device as an actual working condition, and establishes a mathematical model by adjusting the position of the optical sensor outside the device, thereby realizing the optimization of the position of the sensor and the minimization of the quantity; the relevance model is established through image comparison acquired by the internal and external optical sensors of the device, so that information comparison between a sample to be determined (acquired by the external optical sensor of the device) and a standard sample (acquired by the internal optical sensor of the device) can be realized, and further the effect of judging the sealing leakage by applying a remote video on site is guided.
It should be noted that, the blank step on the right side of the shutdown maintenance step in fig. 11 is a reserved position for other steps, and corresponding process steps can be selectively added according to different working conditions.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: when gas enters the gas observation cavity 18, the leakage amount is controlled by controlling the leakage detection assembly 28, meanwhile, the gas flow diffusion track is obtained by the optical sensor 30, and then signals are transmitted to a computer for analysis and calculation, so that the purposes of judging the leakage amount and the leakage degree are achieved.
When liquid enters the liquid observation cavity 39, the leakage amount is controlled by controlling the leakage detection assembly 28, and meanwhile, the liquid flow diffusion track is obtained through the optical sensor 30, and then signals are transmitted to a computer for analysis and calculation, so that the purposes of judging the leakage amount and the leakage degree are achieved.
The above description is only exemplary of the invention and should not be taken as limiting the scope of the invention, so that the invention is intended to cover all modifications and equivalents of the embodiments described herein. In addition, the technical features, the technical schemes and the technical schemes can be freely combined and used.
Claims (13)
1. The utility model provides a mechanical seal simulation leakage experimental apparatus, includes gas leakage detection subassembly, its characterized in that, gas leakage detection subassembly includes:
an air compressor (1);
the gas buffer cavity (16) is internally provided with a coil pipe (25) extending along the axial direction, and the inlet of the coil pipe (25) is communicated with the air compressor (1);
gaseous observation chamber (18), inside is provided with gaseous experiment pipe (27), leak detection subassembly (28) and optical sensor (30), the entry of gaseous experiment pipe (27) and the export intercommunication of coil pipe (25), leak detection subassembly (28) can set up in gaseous observation chamber (18) with moving, and leak detection subassembly (28) are last to be provided with the leak hole that a plurality of intervals set up and diameter crescent, the export of gaseous experiment pipe (27) can select with arbitrary leak hole cooperation butt, optical sensor (30) are fixed and are being observed the exit position of chamber (18) one side inner wall and towards gaseous experiment pipe (27) at gaseous one side.
2. The mechanical seal leakage simulation experiment device according to claim 1, wherein the leakage detection assembly (28) is of a rectangular plate-shaped structure, a plurality of leakage holes are arranged at intervals along the length direction of the rectangular plate-shaped structure, a displacement sensor (29) is arranged outside the gas observation cavity (18), and the displacement sensor (29) is connected with the upper end of the leakage detection assembly (28) and can control any leakage hole to be in matched abutting joint with the outlet of the gas experiment pipe (27).
3. The mechanical seal leakage simulation experiment device according to claim 1, wherein the air compressor (1) is connected with the gas buffer chamber (16) through a first branch, and the first branch is sequentially provided with a filter (2), a main switch (3), a primary pressure reducing valve (5), a secondary pressure reducing valve (7), a stop valve (8), a first electromagnetic valve (12), a drying pipe (13), a quick connector (14) and a first flow sensor (15).
4. The mechanical seal simulated leakage experiment device of claim 3, further comprising a second branch and a gas reservoir (21), wherein the inlet of the second branch is located between the filter (2) and the main switch (3), and the outlet of the second branch is connected with the gas reservoir (21).
5. The mechanical seal leakage simulation experiment device according to claim 4, wherein a discharge valve (4) is arranged on the second branch.
6. The mechanical seal simulated leakage experiment device of claim 4, further comprising a third branch, wherein the inlet of the third branch is located between the stop valve (8) and the first solenoid valve (12), and the outlet of the third branch is connected with the gas storage (21).
7. The mechanical seal leakage simulation experiment device according to claim 6, wherein a pressure maintaining valve (10) and an unloading valve (9) are arranged on the third branch, an inlet of the pressure maintaining valve (10) is connected with the stop valve (8), a first outlet of the pressure maintaining valve (10) is connected with the gas storage (21), a second outlet of the pressure maintaining valve (10) is connected with an inlet of the unloading valve (9), and an outlet of the unloading valve (9) is connected with the gas storage (21).
8. The mechanical seal leakage simulation experiment device according to claim 1, wherein the bottom of the gas observation cavity (18) is provided with an exhaust port (56), and the mechanical seal leakage simulation experiment device further comprises a fourth branch, and two ends of the fourth branch are respectively connected with the exhaust port (56) and the gas storage (21).
9. The mechanical seal simulated leakage experiment apparatus of claim 1, further comprising a liquid leakage detection assembly, said liquid leakage detection assembly comprising:
a centrifugal pump (32);
a liquid buffer chamber (37) with an inlet communicated with the centrifugal pump (32);
the liquid observation cavity (39) is internally provided with a liquid experiment tube (43), a leakage detection assembly (28) and an optical sensor (30), an inlet of the liquid experiment tube (43) is communicated with an outlet of the liquid buffer cavity (37), a plurality of leakage holes which are arranged at intervals and gradually increased in diameter are formed in the leakage detection assembly (28), the outlet of the liquid experiment tube (43) can be selectively abutted with any leakage hole in a matched mode, and the optical sensor (30) is fixed on the inner wall of one side of the liquid observation cavity (39) and faces to the outlet of the liquid experiment tube (43).
10. The mechanical seal leakage simulation experiment device according to claim 9, wherein the leakage detection assembly (28) is a rectangular plate-shaped structure, a plurality of leakage holes are arranged at intervals along the length direction of the rectangular plate-shaped structure, a displacement sensor (29) is arranged outside the gas observation cavity (18), and the displacement sensor (29) is connected with the upper end of the leakage detection assembly (28) and can control any leakage hole to be in matched abutting joint with the outlet of the gas experiment pipe (27).
11. The mechanical seal leakage simulation experiment device according to claim 9, wherein a water inlet control valve (33) and a second flow sensor (35) are sequentially arranged on a connecting pipeline between the centrifugal pump (32) and the liquid buffer chamber (37).
12. The mechanical seal leakage simulator according to claim 11, further comprising a water storage tank (41), wherein an inlet of the water storage tank is connected to both the liquid outlet of the liquid buffer chamber (37) and the liquid outlet of the liquid observation chamber (39), and an outlet of the water storage tank (41) is connected to an inlet of the second flow sensor (35) through a circulation pipeline.
13. The mechanical seal leakage simulation experiment device according to claim 12, wherein a circulation pump (42) and a circulation water control valve (34) are sequentially arranged on the circulation pipeline.
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| CN114673940A (en) * | 2022-05-18 | 2022-06-28 | 广东美景环境科技有限公司 | Water supply network leakage detection device based on Internet of things |
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