CN210401015U - Multi-angle erosion corrosion experimental apparatus based on guide plate - Google Patents
Multi-angle erosion corrosion experimental apparatus based on guide plate Download PDFInfo
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- CN210401015U CN210401015U CN201920476231.8U CN201920476231U CN210401015U CN 210401015 U CN210401015 U CN 210401015U CN 201920476231 U CN201920476231 U CN 201920476231U CN 210401015 U CN210401015 U CN 210401015U
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Abstract
The utility model provides a multi-angle erodees corrosion experiment device based on guide plate, include guide plate, solution tank, influent stream pipeline, return line, erode runner and electrochemical workstation. The guide plate is designed to be streamline, when the guide plate is horizontally placed, an upper liquid distribution flow path and a lower liquid distribution flow path are formed, and disturbance to the horizontal flow of the sample to the fluid is reduced. The device is particularly suitable for pipeline erosion corrosion electrochemical test experiments. The guide plate has a simple structure, is convenient to operate, can carry out erosion corrosion on a sample to be tested at a set angle to form erosion corrosion with local flow field change, and is favorable for researching the influence of the local flow field change on the corrosion morphology.
Description
Technical Field
The utility model relates to an erosion and corrosion experiment field, concretely relates to multi-angle erosion and corrosion experimental apparatus based on guide plate.
Background
With the continuous development of the transportation industry, pipeline transportation brings great convenience to the life of people in the aspects of water transportation, gas transportation, oil transportation, power supply and the like, and the pipeline transportation becomes the fifth major transportation industry developed after highway, railway, water transportation and air transportation. The pipeline transportation industry in China starts late, a first oil pipeline is built from 1985, the pipeline transportation development speed is rapid in recent years, and the oil and gas pipeline transportation mileage reaches more than 6000km according to incomplete statistics. However, at present, the mechanism and theoretical research on the pipeline erosion mechanism in China is limited, and the internal flow field of the pipeline is easily influenced by various factors, so that the local pipeline erosion corrosion is easily caused, and the research on the pipeline erosion corrosion is very complicated.
Erosive corrosion is the intensified corrosion action between a metal surface and a corrosive fluid due to high-speed relative motion. The flow field is changed sharply when fluid flows through the device due to erosion corrosion in a gas-liquid two-phase flow environment, so that special local flow field environments such as local micro-turbulence, cavitation, local vortex and the like are formed, and a corrosion product film generated on the inner wall of the pipeline is damaged and peeled. Erosion and corrosion accidents caused by local flow field changes occur successively every year, so that the effect of the internal flow field of the pipeline on the pipeline steel needs to be deeply researched. Jensenetal adopts a freezing scouring bed which does not deform to simulate the flow field distribution and stress distribution around the pipeline under the action of unidirectional flow, and lays a foundation for a flow field distribution experiment in the fluid scouring process. Simulating and researching the cylindrical winding wake under the low Reynolds number by using the board vibration and the like to obtain conclusions such as the influence of the flow resistance ratio and the long path on the winding wake and the influence factors of the stagnation point pressure. The experts make specific studies on the flow field distribution of changes in the pipeline, but no practical experimental device can effectively test the flow field distribution. The dawn et al in 2013 proposed a corrosion test device related to a multiphase flow tube flow brush, which can better simulate the requirements of a three-electrode system electrochemical test on a tube wall under horizontal scouring flow, but cannot simulate the influence of the change of a flow field on the corrosion process.
Disclosure of Invention
To the not enough of above-mentioned prior art, the utility model provides a multi-angle erosion corrosion experimental apparatus based on guide plate, the device have different deflector types to the pipeline of difference design respectively, through adjusting the guide plate, can make the sample that awaits measuring erode the corrosion with the angle of settlement, form the little torrent corrosion that local flow field changes, are favorable to studying the influence of local flow field change to corroding the appearance.
The utility model discloses a concrete technical scheme is:
a multi-angle erosion corrosion experiment device based on a guide plate comprises a pressure valve, a pressure gauge, a gas flowmeter, a solution tank, a check valve, a main return pipeline, an electrochemical workstation, a sample mounting port, an angle adjusting rod, an erosion flow channel, a guide plate mounting shaft, a liquid flowmeter, a main inflow pipeline, a main flow valve, a return pipeline, a return valve, a centrifugal pump, an inflow pipeline, a cooling coil, a gas cylinder, a mounting shaft fixing nut and a guide plate;
the air inlet of the solution tank is connected with the air bottle through a pipeline, and the liquid outlet of the solution tank is connected with the inlet of the centrifugal pump through a flow inlet pipeline; the outlet of the centrifugal pump is connected with a main return pipeline through a return pipeline; the middle position of the return pipeline is connected with an inlet of the main inflow pipeline; the outlet of the main inflow pipeline is connected with the inlet of the main return pipeline through a flushing flow channel; the outlet of the main return pipeline is connected with the liquid inlet of the solution tank; the bottom of the scouring flow channel is provided with a sample mounting port, and the sample mounting port is connected with the electrochemical workstation through a lead;
a guide plate mounting shaft is arranged in the middle of the scouring flow channel and vertically penetrates through the scouring flow channel; the front end of the guide plate mounting shaft is provided with an angle adjusting rod, the middle part of the guide plate mounting shaft is provided with a guide plate, the tail part of the guide plate mounting shaft is provided with threads, and the mounting shaft fixing nut is connected with the guide plate mounting shaft through the threads; the guide plate, the angle adjusting rod and the guide plate mounting shaft are integrated, and the angle adjusting rod and the guide plate are positioned on the same axis; the angle of the guide plate can be adjusted through the angle adjusting rod and is used for guiding fluid to wash the test sample at different angles, changing the change of a local flow field above the test sample and further researching the influence of the flow field change on corrosion products;
a pressure valve, a pressure gauge and a gas flowmeter are arranged on a pipeline connecting an air inlet of the solution tank and the gas cylinder; a check valve is arranged on the main return pipeline; the main flow inlet pipeline is provided with a main flow valve and a liquid flowmeter; a return valve is arranged on the return pipeline; the main flow valve and the backflow valve are used for controlling the flow of liquid entering the scouring flow channel;
the solution tank is provided with a cooling coil, and the cooling coil is connected after the device is stabilized, so that the temperature of the solution in the whole device is kept constant;
the angle adjusting rod and the mounting shaft fixing nut are positioned outside the scouring flow channel; the flow guide plate is positioned in the scouring flow channel; the end face of the guide plate is streamline, so that when the guide plate is horizontally arranged, the disturbance to the horizontal flow fluid is reduced; different shapes can be designed for different pipelines, the square pipeline can be set to be square, and the circular pipeline can be set to be arc-shaped; the scouring section of the guide plate is designed based on the size of the through-flow section of the scouring flow channel, so that the fluid scouring in the horizontal direction of the sample is not influenced when the guide plate is horizontally placed, meanwhile, a gap is reserved between the guide plate and the sample mounting port, the fluid perturbation in the horizontal direction of the sample is very small, and when the guide plate is adjusted to a certain angle, the lower part of the guide plate and the upper part of the sample can reach a laminar flow state and a turbulent flow state;
an angle scale of-90 degrees to +90 degrees is engraved on the outer wall of the scouring flow channel at the same horizontal axis at the upper end of the angle adjusting rod, so that the angle adjusting rod can conveniently indicate the angle change condition of the guide plate;
the effect of return line and return valve is when closing the main flow valve for solution flows back to the solution tank through the return line, thereby realizes the more abundant mixture of liquid in the solution tank.
Before the device runs, a three-electrode system (namely a sample) sealed by epoxy resin is loaded into a flushing flow channel through a sample mounting port, a pressure valve on a pipeline connected with a gas cylinder is opened, the pressure valve is controlled to the required gas quantity by observing a pressure gauge and a gas flowmeter, a backflow valve is opened, a main flow valve and a check valve are closed, and liquid in a solution tank enters a centrifugal pump through a flow inlet pipeline and flows back to the solution tank again through the backflow pipeline through the centrifugal pump; adjusting the angle adjusting rod to enable the guide plate to reach a set angle, screwing a mounting shaft fixing nut sleeved at the tail part of the mounting shaft of the guide plate, and completing preparation work after operation is stable; when the device is operated, the electrochemical workstation is opened, the cooling coil in the solution tank is connected, the liquid in the solution tank enters the centrifugal pump through the inflow pipeline, after the temperature of the system is constant, the main flow valve is slowly opened, the check valve is completely opened, the reflux valve is regulated, and the liquid flow required by the experiment is observed by the liquid flow meter; at the moment, a part of solution enters a return pipeline through a centrifugal pump and then flows back to the solution tank again; the other part of the solution enters the scouring flow channel through the main inflow pipeline, the solution in the scouring flow channel enters the main return pipeline through the guide plate, and the liquid in the main return pipeline returns to the solution tank again; the measurement of the electrochemically relevant parameter is carried out in an electrochemical workstation.
The utility model has the advantages that:
(1) due to the design of the guide plate, the sample to be tested is subjected to erosion corrosion at a set angle, micro-turbulent corrosion of local flow field change is formed, and the influence of the local flow field change on the corrosion morphology is favorably researched.
(2) The end face of the guide plate is designed to be streamline, so that an upper liquid distribution flow path and a lower liquid distribution flow path can be formed when the guide plate is horizontally placed, the disturbance to the horizontal flow of the sample to the fluid is reduced, and the flushing state of the sample in the flushing channel is tested when no guide plate exists.
(3) The angle of adjustment of guide plate is-90 to +90, and installation axle and guide plate and angle adjusting lever formula design as an organic whole, can play the fixed action and can indicate the guide plate angle change simultaneously.
The utility model discloses a multi-angle erosion corrosion experimental apparatus based on guide plate of preparation, the device in the guide plate simple structure, the operation of being convenient for can make the sample that awaits measuring erode the corrosion with the angle of settlement, form the erosion corrosion of local flow field change, be favorable to studying the influence of local flow field change to corroding the appearance.
Drawings
FIG. 1 is a schematic structural diagram of a multi-angle erosion corrosion experiment apparatus based on a guide plate according to the present invention;
FIG. 2 is a front cross-sectional view of the erosion flow channel of the multi-angle erosion corrosion test apparatus based on the flow guide plate of the present invention;
FIG. 3 is a side view of the erosion flow channel of the multi-angle erosion corrosion experiment apparatus based on the flow guide plate of the present invention;
FIG. 4 is a side sectional view of the erosion flow channel of the multi-angle erosion corrosion test apparatus based on the flow guide plate of the present invention;
FIG. 5 is a schematic diagram of the change of the internal flow field of the erosion flow channel when the angle of the guide plate of the multi-angle erosion corrosion experiment device based on the guide plate is adjusted to be a positive angle;
FIG. 6 is a schematic diagram of the change of the internal flow field of the erosion flow channel when the angle of the guide plate of the multi-angle erosion corrosion experiment device based on the guide plate is negative;
FIG. 7 is a schematic diagram of the change of the internal flow field of the erosion flow channel when the angle of the guide plate of the multi-angle erosion corrosion experiment device based on the guide plate is 0 degree;
in the figure: 1 is the mainstream valve, 2 is the manometer, 3 is the gas flowmeter, 4 is the solution tank, 5 is the check valve, 6 is main return line, 7 is the electrochemical workstation, 8 is the sample installing port, 9 is the angle adjusting lever, 10 is the scour runner, 11 is guide plate installation axle, 12 is the fluidflowmeter, 13 is main inlet line, 14 is the mainstream valve, 15 is return line, 16 is the return valve, 17 is the centrifugal pump, 18 is the inlet line, 19 is cooling coil, 20 is the gas cylinder, 21 is installation axle fixation nut, 22 is the scour runner entry, 23 is the guide plate.
Detailed Description
Referring to fig. 2, the utility model provides a multi-angle erosion corrosion experimental apparatus based on guide plate, including pressure valve 1, manometer 2, gas flowmeter 3, solution tank 4, check valve 5, main return line 6, electrochemical workstation 7, sample installing port 8, angle adjusting rod 9, erode runner 10, guide plate installation axle 11, liquid flowmeter 12, main influent line 13, main flow valve 14, return line 15, return valve 16, centrifugal pump 17, influent line 18, cooling coil 19, gas cylinder 20, installation axle fixation nut 21 and guide plate 23; the air inlet of the solution tank 4 is connected with an air bottle 20 through a pipeline, and the liquid outlet of the solution tank is connected with the inlet of a centrifugal pump 17 through a flow inlet pipeline 18; the outlet of the centrifugal pump 17 is connected with the main return pipeline 6 through a return pipeline 15; the middle part of the return pipeline 15 is connected with the inlet of the main inflow pipeline 13; the outlet of the main inflow pipeline 13 is connected with the inlet of the main return pipeline 6 through the flushing flow channel 10; an outlet of the main return pipeline 6 is connected with a liquid inlet of the solution tank 4; the bottom of the scouring flow channel 10 is provided with a sample mounting port 8, and the sample mounting port 8 is connected with the electrochemical workstation 7 through a lead; a guide plate mounting shaft 11 is arranged in the middle of the scouring flow channel 10, and the guide plate mounting shaft 11 vertically penetrates through the scouring flow channel 10; the front end of the guide plate mounting shaft 11 is provided with an angle adjusting rod 9, the middle part is provided with a guide plate 23, the tail part is provided with threads, and the mounting shaft fixing nut 21 is connected with the guide plate mounting shaft 11 through the threads; the guide plate 23, the angle adjusting rod 9 and the guide plate mounting shaft 11 are integrated, and the angle adjusting rod 9 and the guide plate 23 are positioned on the same axis; a pressure valve 1, a pressure gauge 2 and a gas flowmeter 3 are arranged on a pipeline connecting an air inlet of the solution tank 4 and the gas cylinder 20; a main flow valve 14 and a liquid flowmeter 12 are arranged on the main inlet pipeline 13; a return valve 16 is arranged on the return pipeline 15; a cooling coil 19 is arranged in the solution tank 4; the angle adjusting rod 9 and the mounting shaft fixing nut 21 are positioned outside the scouring flow channel 10; the baffle 23 is positioned inside the flushing flow passage 10; the end face of the pipeline is streamline, different shapes can be designed aiming at different pipelines, the pipeline can be set to be square aiming at a square pipeline, and the circular pipeline can be set to be arc-shaped; an angle scale ranging from-90 degrees to +90 degrees is engraved on the outer wall of the scouring flow channel 10 at the same horizontal axis at the upper end of the angle adjusting rod 9.
Before the device runs, a three-electrode system (namely a sample) sealed by epoxy resin is loaded into a flushing flow channel 10 through a sample mounting port 8, a pressure valve 1 on a pipeline connected with a gas cylinder 20 is opened, the pressure valve 1 is controlled to the required gas quantity by observing a pressure gauge 2 and a gas flowmeter 3, a return valve 16 is opened, a main flow valve 14 and a check valve 5 are closed, liquid in a solution tank 4 enters a centrifugal pump 17 through a flow inlet pipeline 18, and flows back into the solution tank 4 again through a return pipeline 15 through the centrifugal pump 17; the angle adjusting rod 9 is adjusted to enable the guide plate 23 to reach a set angle, the mounting shaft fixing nut 21 sleeved at the tail of the guide plate mounting shaft 11 is screwed, and the operation is stable, so that the preparation work is completed; when the device is operated, the electrochemical workstation 7 is opened, the cooling coil 19 in the solution tank 4 is connected, the liquid in the solution tank 4 enters the centrifugal pump 17 through the inflow pipeline 18, after the temperature of the belt system is constant, the main flow valve 14 is slowly opened, the check valve 5 is completely opened, the return valve 16 is adjusted, and the liquid flow required by the experiment is observed through the liquid flow meter 12; at this time, a part of the solution enters the return pipeline 15 through the centrifugal pump 17 and then flows back to the solution tank 4 again; the other part of the solution enters the scouring flow channel 10 through the main inflow pipeline 13, the solution in the scouring flow channel 10 enters the main return pipeline 6 through the guide plate 23, and the liquid in the main return pipeline 6 returns to the solution tank 4 again; the measurement of the electrochemically relevant parameters is carried out in the electrochemical workstation 7.
Claims (7)
1. The utility model provides a multi-angle erodees corrosion experiment device based on guide plate, includes pressure valve (1), manometer (2), gas flowmeter (3), solution tank (4), electrochemical workstation (7), liquid flowmeter (12), main influent stream pipeline (13), mainstream valve (14), return line (15), return valve (16), centrifugal pump (17), influent stream pipeline (18) and gas cylinder (20), its characterized in that: the air inlet of the solution tank (4) is connected with an air bottle (20) through a pipeline, and the liquid outlet of the solution tank is connected with the inlet of a centrifugal pump (17) through a flow inlet pipeline (18); the outlet of the centrifugal pump (17) is connected with the main return pipeline (6) through a return pipeline (15); the middle part of the return pipeline (15) is connected with an inlet of the main inflow pipeline (13); the outlet of the main inflow pipeline (13) is connected with the inlet of the main return pipeline (6) through a flushing flow channel (10); an outlet of the main return pipeline (6) is connected with a liquid inlet of the solution tank (4); and a sample mounting port (8) is formed in the bottom of the scouring flow channel (10), and the sample mounting port (8) is connected with the electrochemical workstation (7) through a lead.
2. The multi-angle erosion corrosion experimental device based on the guide plate as claimed in claim 1, wherein: a guide plate mounting shaft (11) is arranged in the middle of the scouring flow channel (10), and the guide plate mounting shaft (11) vertically penetrates through the scouring flow channel (10); an angle adjusting rod (9) is arranged at the front end of the guide plate mounting shaft (11), a guide plate (23) is arranged in the middle of the guide plate mounting shaft, threads are arranged at the tail of the guide plate mounting shaft, and a mounting shaft fixing nut (21) is connected with the guide plate mounting shaft (11) through the threads; the guide plate (23), the angle adjusting rod (9) and the guide plate mounting shaft (11) are integrated, and the angle adjusting rod (9) and the guide plate (23) are positioned on the same axis.
3. The multi-angle erosion corrosion experimental device based on the guide plate as claimed in claim 1, wherein: a pressure valve (1), a pressure gauge (2) and a gas flowmeter (3) are arranged on a pipeline connecting an air inlet of the solution tank (4) and the gas cylinder (20); a check valve (5) is arranged on the main return pipeline (6); a main flow valve (14) and a liquid flowmeter (12) are arranged on the main inflow pipeline (13); and a return valve (16) is arranged on the return pipeline (15).
4. The multi-angle erosion corrosion experimental device based on the guide plate as claimed in claim 1, wherein: the solution tank (4) is internally provided with a cooling coil (19).
5. The multi-angle erosion corrosion experimental device based on the guide plate as claimed in claim 2, wherein: the angle adjusting rod (9) and the mounting shaft fixing nut (21) are positioned outside the scouring flow channel (10); the flow guide plate (23) is positioned inside the flushing flow channel (10).
6. The multi-angle erosion corrosion experimental device based on the guide plate as claimed in claim 2, wherein: the end face of the guide plate (23) is streamline.
7. The multi-angle erosion corrosion experimental device based on the guide plate as claimed in claim 2, wherein: an angle scale from-90 degrees to +90 degrees is engraved on the outer wall of the scouring flow channel (10) at the same horizontal axis at the upper end of the angle adjusting rod (9).
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| CN201920476231.8U CN210401015U (en) | 2019-04-10 | 2019-04-10 | Multi-angle erosion corrosion experimental apparatus based on guide plate |
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| CN201920476231.8U CN210401015U (en) | 2019-04-10 | 2019-04-10 | Multi-angle erosion corrosion experimental apparatus based on guide plate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110132716A (en) * | 2019-04-10 | 2019-08-16 | 中国石油大学(华东) | A kind of adjustable drainage erosion corrosion test macro |
| CN110132716B (en) * | 2019-04-10 | 2024-04-19 | 中国石油大学(华东) | Adjustable drainage erosion corrosion test system |
-
2019
- 2019-04-10 CN CN201920476231.8U patent/CN210401015U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110132716A (en) * | 2019-04-10 | 2019-08-16 | 中国石油大学(华东) | A kind of adjustable drainage erosion corrosion test macro |
| CN110132716B (en) * | 2019-04-10 | 2024-04-19 | 中国石油大学(华东) | Adjustable drainage erosion corrosion test system |
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