CN209624276U - It is a kind of for detecting the device of reduced pipe erosion corrosion - Google Patents
It is a kind of for detecting the device of reduced pipe erosion corrosion Download PDFInfo
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- CN209624276U CN209624276U CN201821812729.9U CN201821812729U CN209624276U CN 209624276 U CN209624276 U CN 209624276U CN 201821812729 U CN201821812729 U CN 201821812729U CN 209624276 U CN209624276 U CN 209624276U
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Abstract
The utility model provides a kind of for detecting the device of reduced pipe erosion corrosion, including test device and reducing tube portion, test device includes screw pump, control cabinet, sink, wash away room and electro-chemical test recording device, the lower section of the control cabinet is arranged in the screw pump, the water inlet of the screw pump is connected by water inlet pipe road with the water outlet of the sink, the water outlet of the screw pump is connected by washing away water inlet pipe road with the water inlet for washing away room, the water outlet for washing away room is connected by washing away outlet pipeline with the water inlet of the sink, interior is washed away described in being partially installed in the reduced pipe, and the reducing tube portion is connected with the water inlet pipe road of washing away, the electro-chemical test recording device is connected by test lead with the reducing tube portion.The device realizes that reduced pipe erosion corrosion weightless test and electro-chemical test carry out simultaneously, and the electrochemical measurement of real-time, multiple spot, original position is realized at reduced pipe different location.
Description
Technical field
The utility model relates to erosion corrosion detection device technology fields, more specifically to one kind for detecting reducing
The device of pipe erosion corrosion.
Background technique
Currently, research pipe flushing corrosion experimental provision mainly have injecting type experimental provision, rotary experimental device and
(Rajahram S S, Harvey T J, Wood R J K, the Erosion-corrosion such as fluid-guiding type experimental provision
resistance of engineering materials in various test conditions,Wear,2009,267
(1-4): 244-254)；Different experimental provisions, institute are experimentally different with research means.Injecting type experimental provision
Can simulate the erosion corrosion process under any eroding velocity and angle, but cannot simulation actual working conditions very well, and
Scouring intensity is bigger than actual conditions, has a certain distance with the practical Scouring Condition of pump, pipeline.Rotary experimental device, which has, to be set
The advantages that standby simple, price is low, experimental period is short, but require motor to rotate steady, rotary shaft and do not shake under high-speed rotation
It is dynamic, and cannot the actual working conditions of true simulation pipeline (Tang Can liquid fixed double phase flow, which cooperates with metal surface erosion corrosion, to be made
With the Xi'an research [D]: Xi'an Petroleum University, 2018).Fluid-guiding type experimental provision can simulate pipeline under actual condition well
Erosion corrosion, can accurate coutroi velocity, have good fluid mechanic model, and experimental result has very strong practical value (ginger
Dawn rosy clouds, Li Shizhuo, Li Shu corrosion of metal abrasion Beijing [M]: Chemical Industry Press, 2003).
For pipeline in pumped (conveying) medium, the pipe fitting being exposed in moving fluid all can be by the destruction of different degrees of erosion, especially
It is that erosion corrosion rate at bend pipe and reduced pipe is higher by tens times, and washing away at reduced pipe different location than straight tube place
Etching characteristic is also different；Failure mode is groove, is thinned, or even fracture.In recent years, accident layer caused by being destroyed because of pipeline erosion
Not poor out (Hangzhou numerical simulation [D] of Hu Yuehua typical component erosion corrosion: Zhejiang University, 2012).The research such as Liu Jianguo
Influence (Liu J G, BaKeDaShi W L, Li Z L, et al, Effect of of the flow velocity to 90 ° of elbow erosion corrosions
flow velocity on erosion–corrosion of 90-degree horizontal elbow, Wear,2017,
376:516-525), Jin etc. has studied failure conditions (the Jin H, Chen of tee pipe fitting erosion corrosion under the conditions of multiphase flow
X,Zheng Z,et al,Failure analysis of multiphase flow corrosion-erosion with
Three-way injecting water pipe, Engineering Failure Analysis, 2017,73:46-56), but
It is seldom to the research of reduced pipe erosion corrosion, and existing experimental provision be unable to characterize reduced pipe difference regional area wash away corruption
Erosion feature and the reciprocation washed away and corroded show significant limitation in research reduced pipe erosion corrosion.
Utility model content
The utility model overcomes deficiency in the prior art, and existing experimental provision is unable to characterize the different parts of reduced pipe
The erosion corrosion feature in region and the reciprocation washed away and corroded provide a kind of for detecting the dress of reduced pipe erosion corrosion
It sets, which realizes that reduced pipe erosion corrosion weightless test and electro-chemical test carry out simultaneously, and at reduced pipe different location
Realize the electrochemical measurement of real-time, multiple spot, original position.
The purpose of this utility model is achieved by following technical proposals.
It is a kind of for detecting the device of reduced pipe erosion corrosion, including test device and reducing tube portion,
The test device includes screw pump, control cabinet, sink, washes away room and electro-chemical test recording device, the spiral shell
Bar pumps the lower section that the control cabinet is arranged in, and the water inlet of the screw pump passes through the water outlet phase on water inlet pipe road and the sink
Connection, the water outlet of the screw pump is connected by washing away water inlet pipe road with the water inlet for washing away room, the room of washing away
Water outlet is connected by washing away outlet pipeline with the water inlet of the sink, is partially installed on described wash away in the reduced pipe
Interior, and the reducing tube portion is connected with the water inlet pipe road of washing away, the electro-chemical test recording device passes through test
Conducting wire is connected with the reducing tube portion；
The reducing tube portion includes reducing pipe mold, major part groove, reducing groove, microcephaly's groove and connector, in institute
It states and offers the major part groove at the major part of reducing pipe mold, offer the variable diameter at the variable diameter of the reducing pipe mold
Groove offers microcephaly's groove at the microcephaly of the reducing pipe mold, the major part groove, the reducing groove and
Encapsulation work electrode in microcephaly's groove is opened in the bottom of the major part groove, the reducing groove and microcephaly's groove
Equipped with wire guide, reference electrode mounting hole is offered on the reducing pipe mold and to electrode mounting hole, each reducing
Pipe mold is fixed by the connector, it is fixed after reducing pipe mold be mounted on it is described wash away interior, it is fixed after reduced pipe
The both ends of mold are connected with isometrical straight tube respectively.
The electro-chemical test recording device includes electrochemical workstation and data recording equipment, the electrochemical workstation
In electrode is plugged on described in electrode mounting hole, the reference electrode in the electrochemical workstation is plugged on the reference
In electrode mounting hole, the working electrode, the reference electrode and described pass through the test lead and the electricity to electrode
Chem workstation is connected, and the electrochemical workstation is connected with the data recording equipment.
The electrochemical workstation uses AutoLab 302N electrochemical workstation, and testing impedance frequency range is 0.1Hz-
10kHz。
The quantity of the reducing pipe mold is 4,6 or 8.
The surface of the working electrode is flushed with the caliber inner surface of the reducing pipe mold.
The working electrode is encapsulated in the major part groove of the reducing pipe mold, the reducing groove through epoxy resin
In microcephaly's groove.
The screw pump uses adjustable screw pump, is adjustably controlled the flow velocity of medium in pipeline.
Described wash away on water inlet pipe road is provided with flowmeter.
The blender for keeping etchant solution uniformly mixed is additionally provided in the sink.
The in-situ detection method of reduced pipe erosion corrosion carries out as steps described below:
Step 1, the equal encapsulation work electrode in the major part groove of reducing pipe mold, reducing groove and microcephaly's groove, is joining
It is fixed than electrode mounting hole and to installation reference electrode in electrode mounting hole and to electrode, and by reducing pipe mold with connector
Afterwards, it is docked with the pipeline in test device, configures solution, quartz sand is added in sink；
Step 2, control cabinet switch is opened, screw pump and blender operation, blender make solution and quartz sand in sink
It is uniformly mixed, screw pump flows solution in sink along pipeline shown in arrow, by flowmeter and reducing tube portion, flows into
Room is washed away, room is washed away and is connected with sink, solution has finally flowed back in sink, forms the circulation line system of erosion-corrosion experiment
System；
Step 3, working electrode, electrode and reference electrode are connect by conducting wire with electrochemical workstation, successively examine online
Survey the corrosion potential and electrochemical impedance spectroscopy of each working electrode；
Step 4, after experiment, turn off control cabinet switch, remove reducing tube portion, take out major part groove, reducing groove
With the working electrode in microcephaly's groove；
Step 5, working electrode is subjected to erosion profile observation and corrosion product constituent analysis, removes working electrode surface
After corrosion product, working electrode is weighed, determines the weight loss of each working electrode；
Step 6, according to weight loss, the electrochemical impedance spectroscopy of working electrode at reduced pipe different location, difference can be obtained
Affecting laws of the parameters such as flow velocity, sand content, sand grains partial size to erosion corrosion at each position of reduced pipe.
The utility model has the following beneficial effects: reducing inside pipe wall is equipped with multiple grooves, it can be in each position of reduced pipe
Locate installment work electrode, realizes that reduced pipe erosion corrosion weightless test and electro-chemical test carry out simultaneously；In reduced pipe difference position
The electrochemical measurement of real-time, multiple spot, original position may be implemented in the place of setting；The erosion corrosion that can be characterized at reduced pipe different location is special
Sign, erosion-corrosion experiment result meet field working conditions.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the structural schematic diagram of reduced pipe, wherein (a) is three-dimensional structure diagram, (b) is backsight structure chart；
Fig. 3 is the specimen enclosure figure of reducing tube portion；
Fig. 4 is the assembling figure and three-electrode system of reducing tube portion；
Fig. 5 is the impedance diagram of sample at reducing tube portion different location after erosion-corrosion experiment 6h；
In figure: 1 is screw pump, and 2 be control cabinet, and 3 be flowmeter, and 4 be sink, and 5 be blender, and 6 is wash away room, and 7 be different
Diameter tube portion, 8 be electrochemical workstation, and 9 be data recording equipment, and 10 be working electrode, and 11 is, to electrode, 12 are reference electricity
Pole, 13 be connector, and 14 be water inlet pipe road, and 15 is wash away water inlet pipe road, and 16 is wash away outlet pipeline, and 17 be reducing pipe mold.
It for those of ordinary skill in the art, without creative efforts, can be according to above attached
Figure obtains other relevant drawings.
Specific embodiment
The technical solution of the utility model is further described below by specific embodiment.
Embodiment one
It is a kind of for detecting the device of reduced pipe erosion corrosion, including test device and reducing tube portion,
Test device includes screw pump 1, control cabinet 2, sink 4, washes away room 6 and electro-chemical test recording device, screw pump 1
The lower section of control cabinet 2 is set, and the water inlet of screw pump 1 is connected by water inlet pipe road 14 with the water outlet of sink 4, screw pump
1 water outlet is connected by washing away water inlet pipe road 15 with the water inlet for washing away room 6, washes away the water outlet of room 6 by washing away water outlet
Pipeline 16 is connected with the water inlet of sink 4, is partially installed on and is washed away in room 6 in reduced pipe, and reducing tube portion with wash away into
Water lines 15 are connected, and electro-chemical test recording device is connected by test lead with reducing tube portion；
Reducing tube portion includes reducing pipe mold 17, major part groove, reducing groove, microcephaly's groove and connector 13, different
Major part groove is offered at the major part of diameter pipe mold 17, reducing groove is offered at the variable diameter of reducing pipe mold 17, in reducing
Microcephaly's groove is offered at the microcephaly of pipe mold 17, the encapsulation work electrode 10 in major part groove, reducing groove and microcephaly's groove,
Wire guide is offered in the bottom of major part groove, reducing groove and microcephaly's groove, reference electricity is offered on reducing pipe mold 17
Pole mounting hole and to electrode mounting hole, each reducing pipe mold 17 is fixed by connector 13, it is fixed after reducing pipe mold 17
It is mounted on and washes away in room 6, the both ends of the reducing pipe mold 17 after fixing are connected with isometrical straight tube respectively.
Electro-chemical test recording device includes electrochemical workstation 8 and data recording equipment 9, in electrochemical workstation 8
Electrode 11 is plugged on in electrode mounting hole, the reference electrode 12 in electrochemical workstation 8 is plugged on reference electrode mounting hole
It is interior, working electrode 10, reference electrode 12 and it is connected by test lead with electrochemical workstation 8 to electrode 11, electrochemistry work
Make station 8 to be connected with data recording equipment 9, electrochemical workstation 8 uses AutoLab 302N electrochemical workstation, testing impedance frequency
Rate range is 0.1Hz-10kHz.
Embodiment two
On the basis of example 1, the quantity of reducing pipe mold 17 be 4,6 or 8, the surface of working electrode 10 with it is different
The caliber inner surface of diameter pipe mold 17 flushes, working electrode 10 be encapsulated in through epoxy resin reducing pipe mold 17 major part groove,
In reducing groove and microcephaly's groove.
Embodiment three
On the basis of example 2, screw pump 1 uses adjustable screw pump, is adjustably controlled the stream of medium in pipeline
Speed is provided with flowmeter 3 on washing away water inlet pipe road 15, is additionally provided in sink 4 for being uniformly mixed etchant solution
Blender 5.
Example IV
The in-situ detection method of reduced pipe erosion corrosion carries out as steps described below:
Step 1, the equal encapsulation work electrode 10 in the major part groove of reducing pipe mold 17, reducing groove and microcephaly's groove,
It is used in reference electrode mounting hole and to installation reference electrode 12 in electrode mounting hole and to electrode 11, and by reducing pipe mold 17
It after connector 13 is fixed, is docked with the pipeline in test device, configures solution, quartz sand is added in sink 4；
Step 2, it opens control cabinet 2 to switch, screw pump 1 and blender 5 are run, and blender 5 makes solution and stone in sink 4
Sand is uniformly mixed, and screw pump 1 flows solution in sink 4 along pipeline shown in arrow, passes through flowmeter 3 and reduced pipe
Part, inflow wash away room 6, wash away room 6 and be connected with sink 4, solution has finally flowed back in sink 4, forms erosion-corrosion experiment
Circulating pipe system；
Step 3, working electrode 10, electrode 11 and reference electrode 12 are connect by conducting wire with electrochemical workstation 8, online
Successively detect the corrosion potential and electrochemical impedance spectroscopy of each working electrode 10；
Step 4, after experiment, turn off the switch of control cabinet 2, remove reducing tube portion, take out major part groove, reducing groove
With the working electrode 10 in microcephaly's groove；
Step 5, working electrode 10 is subjected to erosion profile observation and corrosion product constituent analysis, removes working electrode 10
After the corrosion product on surface, working electrode 10 is weighed, determines the weight loss of each working electrode 10；
Step 6, it according to weight loss, the electrochemical impedance spectroscopy of working electrode 10 at reduced pipe different location, can obtain not
Affecting laws of the parameters such as same flow velocity, sand content, sand grains partial size to erosion corrosion at each position of reduced pipe.
As shown in figure 5, the capacitive reactance arc that a flattening is presented in the impedance complex number plane figure at reduced pipe different location substantially is special
Sign, shows as single time constant feature, and the radius of half arc is different at reduced pipe different location, i.e., corrosion at different locations
Rate is different.The radius of half arc of capacitor is in reduced pipe major part part (Fig. 5 a) maximum, and reduced diameter portion (Fig. 5 b) is larger, and reduced pipe is small
Head point (Fig. 5 c) is minimum, it means that the charge transfer resistance in reduced pipe major part part is maximum, and corrosion rate is minimum, small
The charge transfer resistance on head point is minimum, and corrosion rate is maximum.Compare at the top of reduced pipe, the position of side and duct bottom, top
The radius of half arc of capacitor in portion is maximum, larger, the minimum of bottom of side, this corrosion rate of explanation at the top of pipeline is minimum,
Corrosion rate in bottom is maximum.
The spatially relative terms such as "upper", "lower", "left", "right" have been used in embodiment for ease of explanation, have been used for
Relationship of the elements or features relative to another elements or features shown in explanatory diagram.It should be understood that in addition to figure
Shown in except orientation, spatial terminology is intended to include the different direction of device in use or operation.For example, if in figure
Device be squeezed, the element for being stated as being located at other elements or feature "lower" will be located into other elements or feature "upper".
Therefore, exemplary term "lower" may include both upper and lower orientation.Device, which can be positioned in other ways, (to be rotated by 90 ° or position
In other orientation), it can be interpreted accordingly used herein of the opposite explanation in space.
Moreover, the relational terms of such as " first " and " second " or the like are used merely to one with another with identical
The component of title distinguishes, without necessarily requiring or implying between these components there are any this actual relationship or
Sequentially.
The utility model is described in detail above, but the content is only the preferred embodiment of the utility model,
It should not be considered as limiting the scope of the present invention.Equivalent change made according to the scope of application of this utility model with
Improve etc., it should still belong within the patent covering scope of the utility model.
Claims (9)
1. a kind of for detecting the device of reduced pipe erosion corrosion, it is characterised in that: including test device and reducing tube portion,
The test device includes screw pump, control cabinet, sink, washes away room and electro-chemical test recording device, the screw pump
The lower section of the control cabinet is set, and the water inlet of the screw pump is connected by water inlet pipe road with the water outlet of the sink
Logical, the water outlet of the screw pump is connected by washing away water inlet pipe road with the water inlet for washing away room, described to wash away going out for room
The mouth of a river is connected by washing away outlet pipeline with the water inlet of the sink, is partially installed in the reduced pipe and described is washed away room
It is interior, and the reducing tube portion is connected with the water inlet pipe road of washing away, the electro-chemical test recording device is led by test
Line is connected with the reducing tube portion；
The reducing tube portion includes reducing pipe mold, major part groove, reducing groove, microcephaly's groove and connector, described different
The major part groove is offered at the major part of diameter pipe mold, it is recessed to offer the variable diameter at the variable diameter of the reducing pipe mold
Slot offers microcephaly's groove at the microcephaly of the reducing pipe mold, in the major part groove, the reducing groove and institute
Encapsulation work electrode in microcephaly's groove is stated, is opened up in the bottom of the major part groove, the reducing groove and microcephaly's groove
There is wire guide, reference electrode mounting hole is offered on the reducing pipe mold and to electrode mounting hole, each reduced pipe
Mold is fixed by the connector, it is fixed after reducing pipe mold be mounted on it is described wash away interior, it is fixed after reducing pipe die
The both ends of tool are connected with isometrical straight tube respectively.
2. according to claim 1 a kind of for detecting the device of reduced pipe erosion corrosion, it is characterised in that: the electrification
Learning test record device includes electrochemical workstation and data recording equipment, being plugged in the electrochemical workstation to electrode
It is described in electrode mounting hole, the reference electrode in the electrochemical workstation is plugged in the reference electrode mounting hole, institute
State working electrode, the reference electrode and it is described pass through the test lead to electrode and be connected with the electrochemical workstation,
The electrochemical workstation is connected with the data recording equipment.
3. according to claim 2 a kind of for detecting the device of reduced pipe erosion corrosion, it is characterised in that: the electrification
It learns work station and uses AutoLab 302N electrochemical workstation, testing impedance frequency range is 0.1Hz-10kHz.
4. according to claim 1 a kind of for detecting the device of reduced pipe erosion corrosion, it is characterised in that: the reducing
The quantity of pipe mold is 4,6 or 8.
5. according to claim 1 a kind of for detecting the device of reduced pipe erosion corrosion, it is characterised in that: the work
The surface of electrode is flushed with the caliber inner surface of the reducing pipe mold.
6. according to claim 5 a kind of for detecting the device of reduced pipe erosion corrosion, it is characterised in that: the work
Electrode is encapsulated in the major part groove, the reducing groove and the microcephaly's groove of the reducing pipe mold through epoxy resin
It is interior.
7. according to claim 1 a kind of for detecting the device of reduced pipe erosion corrosion, it is characterised in that: the screw rod
Pump uses adjustable screw pump.
8. according to claim 7 a kind of for detecting the device of reduced pipe erosion corrosion, it is characterised in that: in the punching
Brush water inlet pipe road is provided with flowmeter.
9. according to claim 1 a kind of for detecting the device of reduced pipe erosion corrosion, it is characterised in that: in the water
The blender for keeping etchant solution uniformly mixed is additionally provided in slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821812729.9U CN209624276U (en) | 2018-11-05 | 2018-11-05 | It is a kind of for detecting the device of reduced pipe erosion corrosion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821812729.9U CN209624276U (en) | 2018-11-05 | 2018-11-05 | It is a kind of for detecting the device of reduced pipe erosion corrosion |
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| CN209624276U true CN209624276U (en) | 2019-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821812729.9U Expired - Fee Related CN209624276U (en) | 2018-11-05 | 2018-11-05 | It is a kind of for detecting the device of reduced pipe erosion corrosion |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111141630A (en) * | 2018-11-05 | 2020-05-12 | 天津大学 | Device for detecting erosion corrosion of reducing pipe and detection method thereof |
| CN111562211A (en) * | 2020-04-01 | 2020-08-21 | 大连理工大学 | Online monitoring system for corrosion of inner wall of ocean oil and gas pipeline and processing and mounting method |
| CN114935536A (en) * | 2022-04-28 | 2022-08-23 | 武汉工程大学 | Dynamic in-situ electrochemical test experimental device for pipe section with pressure variable diameter |
-
2018
- 2018-11-05 CN CN201821812729.9U patent/CN209624276U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111141630A (en) * | 2018-11-05 | 2020-05-12 | 天津大学 | Device for detecting erosion corrosion of reducing pipe and detection method thereof |
| CN111562211A (en) * | 2020-04-01 | 2020-08-21 | 大连理工大学 | Online monitoring system for corrosion of inner wall of ocean oil and gas pipeline and processing and mounting method |
| CN111562211B (en) * | 2020-04-01 | 2021-05-18 | 大连理工大学 | Online monitoring system for corrosion of inner wall of ocean oil and gas pipeline and processing and mounting method |
| CN114935536A (en) * | 2022-04-28 | 2022-08-23 | 武汉工程大学 | Dynamic in-situ electrochemical test experimental device for pipe section with pressure variable diameter |
| CN114935536B (en) * | 2022-04-28 | 2024-07-19 | 武汉工程大学 | Dynamic in-situ electrochemical test experimental device for pressurized reducer pipe section |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191112 Termination date: 20201105 |