CN116539512B - Stress corrosion simulation experiment equipment - Google Patents

Stress corrosion simulation experiment equipment Download PDF

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Publication number
CN116539512B
CN116539512B CN202310538579.6A CN202310538579A CN116539512B CN 116539512 B CN116539512 B CN 116539512B CN 202310538579 A CN202310538579 A CN 202310538579A CN 116539512 B CN116539512 B CN 116539512B
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China
Prior art keywords
plate
groove
stress
solution tank
ring
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CN202310538579.6A
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CN116539512A (en
Inventor
张玉楠
朱金阳
李大朋
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University of Science and Technology Beijing USTB
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University of Science and Technology Beijing USTB
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
    • G01N17/006—Investigating resistance of materials to the weather, to corrosion, or to light of metals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
    • G01N17/02—Electrochemical measuring systems for weathering, corrosion or corrosion-protection measurement
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/28—Electrolytic cell components
    • G01N27/30—Electrodes, e.g. test electrodes; Half-cells
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/28—Electrolytic cell components
    • G01N27/30—Electrodes, e.g. test electrodes; Half-cells
    • G01N27/301—Reference electrodes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G01N3/04—Chucks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0016—Tensile or compressive
    • G01N2203/0019—Compressive
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/022—Environment of the test
    • G01N2203/0222—Temperature
    • G01N2203/0226—High temperature; Heating means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/026—Specifications of the specimen
    • G01N2203/0262—Shape of the specimen
    • G01N2203/0274—Tubular or ring-shaped specimens
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

Abstract

The invention discloses stress corrosion simulation experiment equipment which comprises a stress ring, a solution tank, a solution Chi Guaju and a stress loading device, wherein the stress ring is fixed on a base, the solution tank hanging tool comprises an upper hanging tool and a lower hanging tool, the upper hanging tool and the lower hanging tool are symmetrically arranged at the upper end and the lower end of the stress ring, a platinum wire electrode, a reference electrode, a water inlet valve and an exhaust valve are arranged at the upper end of the solution tank, a water outlet valve is arranged at the lower end of the solution tank, an electric heating pipe is arranged in the solution tank, a sample shaft is inserted in the middle of the solution tank in a sealing way, the upper end and the lower end of the sample shaft are arranged between the upper hanging tool and the lower hanging tool in a pushing and pulling way, the upper end of the sample shaft is also connected with a working electrode lead, and the stress loading device is used for adjusting the compression amount of the stress ring through the upper hanging tool in a jacking way. The invention can realize the functions of stress corrosion test and electrochemical in-situ test, and has the advantages of convenience in changing different test samples, convenience in operation and high reliability of test results.

Description

Stress corrosion simulation experiment equipment
Technical Field
The invention relates to the technical field of stress corrosion testing, in particular to stress corrosion simulation experiment equipment.
Background
The oil and gas pipeline has low stress brittle failure phenomenon under the combined action of stress and specific environmental medium, however, stress corrosion is a very hidden local corrosion form, and no obvious sign is provided in advance, so that disastrous accidents are often caused. Stress corrosion only occurs under specific conditions that satisfy the material, medium and stress simultaneously. Typically stress corrosion occurs under tensile stresses, including working stresses, residual stresses, and even wedging stresses of corrosion products in the crack. The oil and gas pipeline only generates stress corrosion in specific corrosive media, the concentration of the specific media is not necessarily high, and the specific media are slightly corrosive. The metal pipe may be considered corrosion resistant in such a medium if no stress is present. From an electrochemical perspective, metal pipes are subject to a specific medium to cause stress corrosion, typically occurring within a range of sensitive potentials.
Therefore, the oil and gas pipeline needs to be subjected to stress corrosion test on pipeline materials before practical application, and the Chinese patent specification of CN111141612B, which is announced by 5 months 13 of 2022, for example, discloses a device for testing the stress corrosion resistance of an oil well pipe to hydrogen sulfide; and the Chinese patent specification of CN103926146B published by 8.17.2016 discloses a small sample constant load stress corrosion testing device. Both devices can carry out stress corrosion experiments on oil and gas pipeline materials, but the two devices need to integrally fix a solution tank in a stress ring during the experiments, and then the stress ring is loaded by a loading bolt at the top so as to carry out stress corrosion experiments. Once the solution tank is fixed in the stress ring, the solution tank is not easy to detach, is unfavorable for repeated experiments, is unfavorable for changing different samples, and can only realize stress corrosion test in a single state, and has single function.
Disclosure of Invention
In order to solve the technical problems that the existing stress corrosion experimental device is inconvenient to replace test samples and single in function, the invention innovatively provides stress corrosion simulation experimental equipment, and from the perspective of rapidly replacing the samples, the whole solution tank can be arranged on a stress ring in a push-pull manner, so that different test samples can be replaced conveniently, in-situ electrochemical experiments can be carried out by changing the temperature, the real service environment of materials can be reduced, and the reliability of test results is improved.
In order to achieve the technical purpose, the embodiment of the invention discloses stress corrosion simulation experiment equipment, which comprises a base, a stress ring, a solution tank, solution tank hangers and a stress loading device, wherein the stress ring is fixed on the base, the solution tank hangers comprise an upper hanger and a lower hanger, the upper hanger and the lower hanger are vertically symmetrically arranged at the upper end and the lower end of the stress ring, a platinum wire electrode, a reference electrode, a water inlet valve and an exhaust valve are arranged at the upper end of the solution tank, a water outlet valve is arranged at the lower end of the solution tank, an electric heating pipe is arranged in the solution tank, a sample shaft is inserted in the center of the solution tank in a sealing way, the upper end and the lower end of the sample shaft are arranged between the upper hanger and the lower hanger in a pushing way, the upper end of the sample shaft is also connected with a working electrode lead, and the stress loading device is connected with the upper hanger and is used for adjusting the compression amount of the stress ring through jacking the upper hanger.
Further, the invention relates to stress corrosion simulation experiment equipment, wherein the upper hanger comprises a fixed plate, an upper groove plate and a connecting plate, the fixed plate is positioned on the outer ring of the stress ring, the upper groove plate is positioned on the inner ring of the stress ring, the lower end of the upper groove plate is provided with an upper hanging groove, the upper end of the sample shaft is hung in the upper hanging groove, the connecting plate is fixed in a groove in the middle of the upper groove plate, sliding holes which are symmetrically distributed in the front and the back are arranged on the fixed plate, guide bolts are arranged in the sliding holes, the guide bolts penetrate through the sliding holes of the fixed plate and are screwed on the upper end face of the connecting plate, and the guide bolts which are oppositely arranged in the front and the back are respectively abutted against the front end face and the rear end face of the stress ring, and clamp the fixed plate and the upper groove plate at the upper end of the stress ring through the guide bolts.
Further, the lower hanger comprises a lower groove plate and fixing bolts, the lower groove plate is located on the inner ring of the stress ring, a lower hanging groove is formed in the upper end of the lower groove plate, the lower end of the sample shaft is hung in the lower hanging groove, the lower groove plate is provided with threaded holes symmetrically arranged in the front-back direction, the fixing bolts penetrate through the base to be rotatably mounted on the lower end face of the lower groove plate, and the fixing bolts oppositely arranged in the front-back direction lean against the front end face and the rear end face of the stress ring respectively, and the lower groove plate is fixed at the lower end of the stress ring through the fixing bolts.
Furthermore, the invention relates to stress corrosion simulation experiment equipment, wherein the upper groove plate and the lower groove plate are arranged in parallel along the axial direction of the stress ring, the notches of the upper hanging groove and the lower hanging groove are both T-shaped, the upper end of the sample shaft is fixedly connected with an upper fixing sleeve, the upper end of the upper fixing sleeve is provided with a T-shaped upper sliding block matched with the upper hanging groove, the lower end of the sample shaft is fixedly connected with a lower fixing sleeve, the lower end of the lower fixing sleeve is provided with a T-shaped lower sliding block matched with the lower hanging groove, and the solution tank is arranged in the upper hanging groove and the lower hanging groove corresponding to the upper groove plate and the lower groove plate in a sliding manner through the upper fixing sleeve and the lower fixing sleeve.
Furthermore, the invention relates to stress corrosion simulation experiment equipment, wherein the bottom of the upper hanging groove is bonded with an upper insulating sleeve, and the bottom of the lower hanging groove is bonded with a lower insulating sleeve.
Furthermore, the stress corrosion simulation experiment equipment comprises a connecting stud, a loading nut and an upper pressing plate, wherein the upper part of the connecting stud is fixed in the middle of the upper pressing plate, the lower part of the connecting stud is inserted into a guide hole arranged in the center of the fixing plate, the loading nut is screwed in the middle of the connecting stud, guide posts are respectively arranged on the front side and the rear side of the upper pressing plate, the guide posts sequentially penetrate through the upper pressing plate and the fixing plate from top to bottom and then are fixedly connected with the lower groove plate, and a compression nut is arranged on the upper part of the guide post in a rotating mode.
Further, according to the stress corrosion simulation experiment equipment disclosed by the invention, the middle part of the upper end of the connecting plate is provided with the inverted splayed groove along the front-back direction, the inverted splayed groove is internally provided with the cylindrical upper sleeper rail, the upper sleeper rail is propped against the inner ring of the stress ring, the middle part of the lower end of the lower groove plate is provided with the positive splayed groove along the front-back direction, the cylindrical lower sleeper rail is arranged in the positive splayed groove, and the lower sleeper rail is propped against the inner ring of the stress ring.
Further, the invention relates to stress corrosion simulation experiment equipment, wherein the solution tank comprises an upper cover plate, a lower cover plate and a glass cylinder, wherein an upper annular groove is formed in the lower end face of the upper cover plate, a lower annular groove is formed in the upper end face of the lower cover plate, the upper end of the glass cylinder is positioned in the upper annular groove of the upper cover plate, the lower end of the glass cylinder is positioned in the lower annular groove of the lower cover plate, and the glass cylinder is tightly pressed between the upper cover plate and the lower cover plate by using a stud bolt.
Further, the stress corrosion simulation experiment equipment is characterized in that an upper sealing hole is formed in the center of the upper cover plate, the lower half part of the upper fixing sleeve is positioned in the upper sealing hole, an upper sealing sleeve is arranged between the outer peripheral wall of the upper fixing sleeve and the hole wall of the upper sealing hole, a sealing ring is arranged between the outer peripheral wall of the upper sealing sleeve and the hole wall of the upper sealing hole, two sealing rings are arranged between the inner peripheral wall of the upper sealing sleeve and the outer peripheral wall of the upper fixing sleeve at intervals, a lower sealing hole is formed in the center of the lower cover plate, the upper half part of the lower fixing sleeve is positioned in the sealing process, a lower sealing sleeve is arranged between the outer peripheral wall of the lower fixing sleeve and the hole wall of the lower sealing hole, and two sealing rings are arranged between the inner peripheral wall of the lower sealing sleeve and the outer peripheral wall of the lower fixing sleeve at intervals.
Furthermore, according to the stress corrosion simulation experiment equipment disclosed by the invention, the platinum wire electrode, the reference electrode, the water inlet valve and the exhaust valve are uniformly arranged on the upper cover plate at intervals, the water outlet valve is arranged on the lower cover plate, the working electrode lead is fixedly connected with the upper fixing sleeve, the electric heating pipe is fixed on the lower cover plate of the solution tank, and the electric heating pipe is annular.
Compared with the prior art, the stress corrosion simulation experiment equipment has the following advantages: according to the invention, the stress ring, the solution tank, the solution Chi Guaju and the stress loading device are arranged, so that the stress ring is fixed on the base; the solution tank hanging tool comprises an upper hanging tool and a lower hanging tool, and the upper hanging tool and the lower hanging tool are vertically symmetrically arranged at the upper end and the lower end of the stress ring; a platinum wire electrode, a reference electrode, a water inlet valve and an exhaust valve are arranged at the upper end of the solution tank, a water outlet valve is arranged at the lower end of the solution tank, an electric heating pipe is arranged in the solution tank, and a sample shaft is inserted in the center of the solution tank in a sealing way; the upper end and the lower end of the sample shaft are arranged between the upper hanging tool and the lower hanging tool in a push-pull manner, and the upper end of the sample shaft is also connected with a working electrode lead; the stress loading device is connected with the upper hanger and is used for adjusting the compression amount of the stress ring by pressing the upper hanger, so that the stress corrosion simulation experiment equipment is formed. When in actual use, the stress ring is fixed on the base; then the upper hanging tool and the lower hanging tool are arranged on the stress ring; then, the sample shaft is arranged in the solution tank; then pushing the solution tank between the upper hanger and the lower hanger, adding the solution to be tested into the solution tank through a water inlet valve, and then pushing the upper hanger arranged on the stress ring downwards through a stress loading device to load the stress, so that the stress ring is compressed and a certain tensile stress is formed on the sample shaft; and finally, connecting the platinum wire electrode, the reference electrode and the working electrode lead with electrodes corresponding to the electrochemical station, and carrying out an in-situ electrochemical experiment. When the temperature in the solution tank needs to be changed, the electric heating pipe is started, when the sample shaft needs to be replaced, the connecting wire of the load and the chemical station is only required to be removed, the current solution tank is pulled out of the hanger, and then the next solution tank with the replaced sample shaft is pushed into the hanger. Compared with the prior art, the method has the advantages that the operation is simpler, the test and replacement of the sample shaft are more convenient, the stress corrosion test efficiency is improved, the temperature in the solution tank can be changed, the real service environment of raw materials can be reduced more accurately, the reliability of the test result is improved, an electrochemical three-electrode system is increased, in-situ electrochemical experiments can be synchronously carried out in the stress corrosion test process, and the stress corrosion evaluation of the raw materials can be carried out more efficiently.
Drawings
FIG. 1 is a schematic diagram of a stress corrosion simulation experiment device;
FIG. 2 is a schematic diagram of a stress loading device of a stress corrosion simulation experiment apparatus according to the present invention;
FIG. 3 is a schematic diagram of the structure of the upper channel plate in the stress corrosion simulation experiment equipment.
Detailed Description
The stress corrosion simulation experiment equipment is explained and illustrated in detail below with reference to the attached drawings.
As shown in fig. 1, the embodiment of the invention discloses stress corrosion simulation experiment equipment, which specifically comprises a base 1, a stress ring 2, a solution tank 3, a solution tank hanger and a stress loading device 4. The stress ring 2 is fixed to the base 1. The solution tank hanger comprises an upper hanger 6 and a lower hanger 7, wherein the upper hanger 6 and the lower hanger 7 are vertically symmetrically arranged at the upper end and the lower end of the stress ring 2, a platinum wire electrode 31, a reference electrode 32, a water inlet valve and an exhaust valve are arranged at the upper end of the solution tank 3, a water outlet valve 33 is arranged at the lower end of the solution tank 3, an electric heating pipe 34 is arranged in the solution tank 3, and a sample shaft 35 is inserted in the center of the solution tank 3 in a sealing manner. The upper and lower ends of the sample shaft 35 are slidably mounted between the upper hanger 6 and the lower hanger 7, and the upper end of the sample shaft 35 is further connected with a working electrode lead 8. The stress loading device 4 is connected with the upper hanging tool 6, so that the stress loading device 4 is used for adjusting the compression amount of the stress ring 2 by pressing the upper hanging tool 6.
In actual use, the stress ring 2 is fixed on the base 1; then the upper hanger 6 and the lower hanger 7 are arranged on the stress ring 2; then, the sample shaft 35 is installed in the solution tank 3; then the solution tank 3 is pushed between the upper hanger 6 and the lower hanger 7, the solution to be tested is added into the solution tank through a water inlet valve, and then the upper hanger 6 arranged on the stress ring 2 is pressed downwards through the stress loading device 4 to carry out stress loading, so that the stress ring 2 is compressed, and a certain tensile stress is formed on the sample shaft 35; finally, the platinum wire electrode 31, the reference electrode 32 and the working electrode lead 8 are connected with electrodes corresponding to an external electrochemical station, and an in-situ electrochemical experiment is carried out. The electric heating tube 34 is activated when it is necessary to change the temperature of the solution in the solution tank 3. When the sample shaft 35 needs to be replaced, the current solution tank 3 is pulled out of the hanger by only removing the connecting wires of the load and the chemical station, and then the next solution tank 3 with the replaced sample shaft 35 is pushed into the hanger. When the solution to be tested in the solution tank 3 needs to be poured out, the emptying valve and the water outlet valve 33 are simultaneously opened, and the solution can flow out through the water outlet valve 33. When it is necessary to change the temperature of the solution tank 3, the drain valve is first opened, then the electric heating pipe 34 is opened, and when the temperature rises to a specified temperature, the electric heating pipe 34 and the drain valve are closed. When the solution tank 3 needs to discharge steam in an overpressure mode, an exhaust valve is opened, and when the pressure of the solution tank 3 reaches the required pressure, the exhaust valve is closed. Compared with the prior art, the invention has the advantages that the operation is simpler, the test replacement of the sample shaft 35 is more convenient, and the improvement of the stress corrosion test efficiency is facilitated; the invention can also change the temperature of the solution in the solution tank 3, more accurately restore the real service environment of the raw materials and improve the reliability of the test result; the electrochemical three-electrode system is added, in-situ electrochemical experiments can be synchronously carried out in the stress corrosion test process, and the stress corrosion evaluation of raw materials can be more efficiently carried out.
As shown in fig. 1 and fig. 3, in an embodiment of the present invention, the upper rack 6 includes a fixing plate 61, an upper slot plate 62 and a connecting plate 63, the fixing plate 61 is located on an outer ring of the stress ring 2, the upper slot plate 62 is located on an inner ring of the stress ring 2, an upper hanging slot is provided at a lower end of the upper slot plate 62, an upper end of the sample shaft 35 is hung in the upper hanging slot, the connecting plate 63 is fixed in a middle groove 621 of the upper slot plate 62, slide holes symmetrically distributed in front and back are provided on the fixing plate 61, guide bolts 64 are provided in the slide holes, the guide bolts 64 are screwed on an upper end face of the connecting plate 63 through the slide holes of the fixing plate 61, and the guide bolts 64 oppositely arranged in front and back are respectively abutted against a front end face and a rear end face of the stress ring 2, and then the fixing plate 61 and the upper slot plate 62 are clamped at an upper end of the stress ring 2 through the guide bolts 64. That is, when the stress loading means 4 presses the stress ring 2, the fixing plate 61 is slidable up and down along the guide bolts 64 in response to the compression amount of the stress ring 2. More specifically, the number of the sliding holes on the fixing plate 61 may be four, that is, the number of the front sides of the fixing plate 61 is two, the number of the rear sides of the fixing plate 61 is two, and the number of the corresponding guide bolts 64 is also 4, so that when the fixing plate 61 and the upper groove plate 62 are clamped on the stress ring 2, the front end surface of the stress ring 2 has two guide bolts 64, and the rear end surface also has two guide bolts 64, so that the connection is more stable.
In one embodiment of the present invention, the lower hanger 7 includes a lower slotted plate 71 and a fixing bolt 72. The lower groove plate 71 is positioned at the inner ring of the stress ring 2, a lower hanging groove is arranged at the upper end of the lower groove plate 71, the lower end of the sample shaft 35 is hung in the lower hanging groove, screw holes symmetrically arranged in front and back are arranged on the lower groove plate 71, the fixing bolts 72 penetrate through the base 1 to be screwed on the lower end face of the lower groove plate 71, the fixing bolts 72 oppositely arranged in front and back are respectively abutted against the front end face and the rear end face of the stress ring 2, and the lower groove plate 71 is fixed at the lower end of the stress ring 2 through the fixing bolts 72. That is, the lower groove plate 71 and the stress ring 2 are fixedly connected, and similarly, four screw holes on the lower groove plate 71 may be provided, that is, two screw holes on the front side of the lower groove plate 71 and two screw holes on the rear side of the lower groove plate 71 are symmetrically provided, and 4 corresponding fixing bolts 72 are provided, so that when the lower groove plate 71 is fixed on the stress ring 2, two fixing bolts 72 are provided on the front end surface of the stress ring 2, and two fixing bolts 72 are provided on the rear end surface, so that the connection is more stable.
In an embodiment of the present invention, in order to facilitate replacement of the solution tank 3, the upper groove plate 62 and the lower groove plate 71 are disposed in parallel along the axial direction of the stress ring 2, and the notches of the upper hanging groove and the lower hanging groove are designed to be T-shaped, the upper end of the sample shaft 35 is fixedly connected with the upper fixing sleeve 36, and the upper end of the upper fixing sleeve 36 is provided with a T-shaped upper slider 361 matched with the upper hanging groove. The lower end of the sample shaft 35 is fixedly connected with a lower fixing sleeve 37, the lower end of the lower fixing sleeve 37 is provided with a T-shaped lower sliding block 371 matched with the lower hanging groove, and the solution tank 3 is arranged in the upper hanging groove and the lower hanging groove corresponding to the upper groove plate 62 and the lower groove plate 71 in a sliding manner through the upper fixing sleeve 36 and the lower fixing sleeve 37. Through the arrangement of the structure, the solution tank 3 can be disassembled and assembled from the stress ring 2 in a push-pull mode, and the replacement is convenient. The other parts except the solution tank 3 can be reused, so that a large number of repeated installation steps are saved, and the experimental efficiency is improved.
To ensure the validity of the in-situ electrochemical experimental data, an upper insulating sleeve 622 is adhered to the bottom of the upper hanging groove of the upper groove plate 62, and a lower insulating sleeve 711 is adhered to the bottom of the lower hanging groove. Thus, the sample shaft 35 can be separated independently, and the electric interference of other components is eliminated, so that experimental data can embody the condition of the sample shaft 35, and the accuracy of the experimental data is ensured. The upper insulating sleeve 622 and the lower insulating sleeve 711 are fixed by a strong adhesive, and if damaged, the upper or lower groove plate 62 or 71 is removed and soaked in alcohol for about 20 minutes, and pushed out.
As shown in fig. 1 in combination with fig. 2, in one embodiment of the present invention, the stress loading device 4 includes a connecting stud 41, a loading nut 42, and an upper platen 43. The upper part of the connecting stud 41 is fixed at the middle part of the upper pressing plate 43, the lower part of the connecting stud 41 is inserted into a guide hole arranged at the center of the fixed plate 61, the loading nut 42 is screwed at the middle part of the connecting stud 41, guide posts 44 are respectively arranged at the front side and the rear side of the upper pressing plate 43, the guide posts 44 pass through the upper pressing plate 43 and the fixed plate 61 in sequence from top to bottom and then are fixedly connected with the lower groove plate 71, and then a compression nut 45 is rotated at the upper part of the guide posts 44. When the stress ring 2 needs to be compressed, the loading nut 42 is screwed downwards, at this time, the loading nut 42 can downwards prop against the fixing plate 61, the fixing plate 61 moves downwards under the action of the guide bolt 64 and the guide post 44, the upper pressing plate 43 at the upper end of the loading nut 42 moves downwards along with the downward movement, when the compression amount of the stress ring 2 reaches a specified size, the compression nut 45 is screwed tightly to play a role in maintaining in place, and finally, the compression of the stress ring 2 is completed, and the stress ring 2 is an elastic ring which is compressed to restore the original shape, so that a certain tensile stress can be applied to the sample shaft 35. In the above process, the compression amount of the stress ring 2 is small, and this compression amount can be measured by a dial indicator, thereby obtaining the compression amount of the stress ring 2.
In an embodiment of the present invention, in order to ensure the uniformity of the stress ring 2 in the axial direction, an inverted splayed groove 631 is disposed in the middle of the upper end of the connecting plate 63 along the front-back direction, and a cylindrical upper sleeper rail 10 is disposed in the inverted splayed groove 631, where the upper sleeper rail 10 abuts against the inner ring of the stress ring 2. A positive splayed groove 712 is arranged in the middle of the lower end of the lower groove plate 71 along the front-back direction, a cylindrical lower sleeper 9 is arranged in the positive splayed groove 712, and the lower sleeper 9 abuts against the inner ring of the stress ring 2.
In one embodiment of the present invention, as shown in FIG. 1, the solution tank 3 includes an upper cover plate 38, a lower cover plate 39, and a glass cylinder 310. An upper ring groove is formed in the lower end face of the upper cover plate 38, a lower ring groove is formed in the upper end face of the lower cover plate 39, the upper end of the glass cylinder 310 is located in the upper ring groove of the upper cover plate 38, the lower end of the glass cylinder 310 is located in the lower ring groove of the lower cover plate 39, and then the glass cylinder 310 is pressed between the upper cover plate 38 and the lower cover plate 39 by using stud bolts 311. In order to enhance the sealability between the upper cover plate 38, the lower cover plate 39 and the glass cylinder 310, sealing rings may be additionally provided in the upper ring groove of the upper cover plate 38 and the lower ring groove of the lower cover plate 39, and then the glass cylinder 310 is compressed between the upper cover plate 38 and the lower cover plate 39 by using the stud bolts 311. During the experiment, the sample shaft 35 can be observed for stress corrosion during the experiment through the glass cylinder 310.
In order to further enhance the sealability of the solution tank 3, three sealing structures are arranged at the joints of the upper cover plate 38 and the lower cover plate 39 of the solution tank 3 and the sample shaft. The setting mode is as follows: an upper sealing hole is formed in the center of the upper cover plate 38, the lower half part of the upper fixing sleeve 36 is positioned in the upper sealing hole, an upper sealing sleeve 312 is arranged between the outer peripheral wall of the upper fixing sleeve 36 and the wall of the upper sealing hole, a sealing ring is arranged between the outer peripheral wall of the upper sealing sleeve 312 and the wall of the upper sealing hole, and two sealing rings are arranged between the inner peripheral wall of the upper sealing sleeve 312 and the outer peripheral wall of the upper fixing sleeve 36 at intervals. A lower sealing hole is formed in the center of the lower cover plate 39, the upper half part of the lower fixing sleeve 37 is in sealing, a lower sealing sleeve 313 is arranged between the outer peripheral wall of the lower fixing sleeve 37 and the wall of the lower sealing hole, a sealing ring is arranged between the outer peripheral wall of the lower sealing sleeve 313 and the wall of the lower sealing hole, and two sealing rings are arranged between the inner peripheral wall of the lower sealing sleeve 313 and the outer peripheral wall of the lower fixing sleeve 37 at intervals.
In the above embodiment, the platinum wire electrode 31, the reference electrode 32, the water inlet valve and the drain valve are generally installed on the upper cover plate 38 at uniform intervals, so that the replacement of the platinum wire electrode 31, the reference electrode 32, the water inlet valve and the drain valve is facilitated. The water outlet valve 33 is mounted on the lower cover plate 39 to facilitate water discharge. The working electrode lead 8 is fixedly connected with the upper fixing sleeve 36, so that wiring is facilitated. The electric heating tube 34 is fixed on the lower cover plate 39 of the solution tank 3, and the electric heating tube 34 is designed into a ring shape, so that uniform heating is facilitated.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
The above description is only of the preferred embodiments of the present invention, and is not intended to limit the invention, but any modifications, equivalents, and simple improvements made within the spirit of the present invention should be included in the scope of the present invention.

Claims (6)

1. The stress corrosion simulation experiment device is characterized in that: the device comprises a base (1), a stress ring (2), a solution tank (3), a solution tank hanging tool and a stress loading device (4), wherein the stress ring (2) is fixed on the base (1), the solution tank hanging tool comprises an upper hanging tool (6) and a lower hanging tool (7), the upper hanging tool (6) and the lower hanging tool (7) are vertically symmetrically arranged at the upper end and the lower end of the stress ring (2), a platinum wire electrode (31), a reference electrode (32), a water inlet valve and an exhaust valve are arranged at the upper end of the solution tank (3), a water outlet valve (33) is arranged at the lower end of the solution tank (3), an electric heating pipe (34) is arranged in the solution tank (3), a sample shaft (35) is inserted in the center of the solution tank (3) in a sealing mode, the upper end and the lower end of the sample shaft (35) are arranged between the upper hanging tool (6) and the lower hanging tool (7) in a pushing and pulling mode, a working electrode lead (8) is further connected at the upper end of the sample shaft (35), the working electrode (8) penetrates out of the upper hanging tool (6), and the stress loading device (4) is connected with the upper hanging tool (6) in a large compression mode, and the stress loading device (4) is used for adjusting the stress amount through the stress ring (4); the upper hanging tool (6) comprises a fixed plate (61), an upper groove plate (62) and a connecting plate (63), wherein the fixed plate (61) is positioned on the outer ring of the stress ring (2), the upper groove plate (62) is positioned on the inner ring of the stress ring (2), an upper hanging groove is formed in the lower end of the upper groove plate (62), the upper end of the sample shaft (35) is hung in the upper hanging groove, the connecting plate (63) is fixed in a groove (621) in the middle of the upper groove plate (62), sliding holes which are symmetrically distributed in the front and back are formed in the fixed plate (61), guide bolts (64) are arranged in the sliding holes, the guide bolts (64) penetrate through the sliding holes of the fixed plate (61) and are screwed on the upper end face of the connecting plate (63), and the guide bolts (64) which are oppositely arranged in the front and back are respectively abutted against the front end face and the rear end face of the stress ring (2), and the fixed plate (61) and the upper groove plate (62) are clamped at the upper end of the stress ring (2) through the guide bolts (64); the lower hanging tool (7) comprises a lower groove plate (71) and fixing bolts (72), the lower groove plate (71) is positioned at the inner ring of the stress ring (2), a lower hanging groove is formed in the upper end of the lower groove plate (71), the lower end of the sample shaft (35) is hung in the lower hanging groove, the lower groove plate (71) is provided with threaded holes which are symmetrically arranged front and back, the fixing bolts (72) penetrate through the base (1) and are rotatably arranged on the lower end face of the lower groove plate (71), and the fixing bolts (72) which are oppositely arranged front and back are respectively abutted against the front end face and the rear end face of the stress ring (2), and the lower groove plate (71) is fixed at the lower end of the stress ring (2) through the fixing bolts (72); the middle part of the upper end of the connecting plate (63) is provided with an inverted splayed groove (631) along the front-back direction, a cylindrical upper sleeper rail (10) is arranged in the inverted splayed groove (631), the upper sleeper rail (10) is propped against the inner ring of the stress ring (2), the middle part of the lower end of the lower groove plate (71) is provided with a positive splayed groove (712) along the front-back direction, a cylindrical lower sleeper rail (9) is arranged in the positive splayed groove (712), and the lower sleeper rail (9) is propped against the inner ring of the stress ring (2); the utility model discloses a solution tank, including upper groove plate (62) and lower groove plate (71), stress ring (2) axis direction parallel arrangement is all followed to upper groove plate (62), the shape of the notch of upper groove and lower groove is the T style of calligraphy, fixed cover (36) are gone up to the upper end fixedly connected with of sample axle (35), upper slider (361) of the T style of calligraphy that goes up fixed cover (36) are equipped with and hang the groove matching, fixed cover (37) are gone up to the lower extreme fixedly connected with of sample axle (35), the lower slider (371) of the T style of calligraphy that hangs the groove matching down are equipped with down fixed cover (37), solution tank (3) are through last fixed cover (36) and lower fixed cover (37) push-and-pull install in upper groove and lower groove that upper groove plate (62) and lower groove plate (71) correspond.
2. The stress corrosion simulation experiment apparatus according to claim 1, wherein: an upper insulating sleeve (622) is adhered to the bottom of the upper hanging groove, and a lower insulating sleeve (711) is adhered to the bottom of the lower hanging groove.
3. A stress corrosion simulation experiment apparatus according to claim 2, wherein: the stress loading device (4) comprises a connecting stud (41), a loading nut (42) and an upper pressing plate (43), wherein the upper part of the connecting stud (41) is fixed at the middle part of the upper pressing plate (43), the lower part of the connecting stud (41) is inserted into a guide hole arranged in the center of a fixed plate (61), the loading nut (42) is rotatably arranged at the middle part of the connecting stud (41), guide columns (44) are respectively arranged on the front side and the rear side of the upper pressing plate (43), and the guide columns (44) sequentially penetrate through the upper pressing plate (43) and the fixed plate (61) from top to bottom and then are fixedly connected with the lower groove plate (71), and compression nuts (45) are rotatably arranged on the upper parts of the guide columns (44).
4. A stress corrosion simulation experiment apparatus according to claim 3, wherein: the solution tank (3) comprises an upper cover plate (38), a lower cover plate (39) and a glass cylinder (310), wherein an upper annular groove is formed in the lower end face of the upper cover plate (38), a lower annular groove is formed in the upper end face of the lower cover plate (39), the upper end of the glass cylinder (310) is located in the upper annular groove of the upper cover plate (38), the lower end of the glass cylinder (310) is located in the lower annular groove of the lower cover plate (39), and the glass cylinder (310) is tightly pressed between the upper cover plate (38) and the lower cover plate (39) through a stud bolt (311).
5. The stress corrosion simulation experiment apparatus according to claim 4, wherein: the center of upper cover plate (38) is equipped with the sealed hole, the lower half of upper fixed cover (36) is in the sealed hole on, is equipped with seal cover (312) between the outer peripheral wall of upper fixed cover (36) and the pore wall of upper sealed hole, be equipped with a sealing washer between the outer peripheral wall of upper seal cover (312) and the pore wall of upper sealed hole, the interval between the inner peripheral wall of upper seal cover (312) and the outer peripheral wall of upper fixed cover (36) is equipped with the twice sealing washer, the center of lower cover plate (39) is equipped with the sealed hole down, the upper half of lower fixed cover (37) is in the seal, is equipped with seal cover (313) down between the outer peripheral wall of lower fixed cover (37) and the pore wall of lower sealed hole, be equipped with a sealing washer down between the outer peripheral wall of seal cover (313) and the outer peripheral wall of lower sealed hole, the interval is equipped with the twice sealing washer down between the inner peripheral wall of seal cover (313) and lower fixed cover (37).
6. The stress corrosion simulation experiment apparatus according to claim 5, wherein: the platinum wire electrode (31), the reference electrode (32), the water inlet valve and the exhaust valve are uniformly arranged on the upper cover plate (38) at intervals, the water outlet valve (33) is arranged on the lower cover plate (39), the working electrode lead (8) is fixedly connected with the upper fixing sleeve (36), the electric heating pipe (34) is fixed on the lower cover plate (39) of the solution tank (3), and the electric heating pipe (34) is annular.
CN202310538579.6A 2023-05-12 2023-05-12 Stress corrosion simulation experiment equipment Active CN116539512B (en)

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Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0311522A1 (en) * 1987-10-08 1989-04-12 Avions Marcel Dassault-Breguet Aviation Device for clamping two structure elements to be assembled
CN200944089Y (en) * 2006-01-18 2007-09-05 宝山钢铁股份有限公司 Device for preventing specimen distortion adapted for stress test
CN101178343A (en) * 2007-11-30 2008-05-14 山东大学 Brittle material test member felted axis pulling experiment positioning apparatus
CN101608995A (en) * 2008-06-20 2009-12-23 宝山钢铁股份有限公司 The measuring method of galvanic corrosion and sample thereof under the high-stress state of welded tube weld seam
CN103323387A (en) * 2013-06-25 2013-09-25 沈阳建筑大学 Electro-chemical corrosion simulator with in-situ loading
CN103543066A (en) * 2013-10-24 2014-01-29 山东大学 Sleeve-spliced rock direct tensile test device and method
CN103926146A (en) * 2014-04-11 2014-07-16 西南石油大学 Constant-load stress corrosion testing device of small test sample and testing method thereof
CN109507100A (en) * 2018-11-23 2019-03-22 北京航空航天大学 Corrosion electrochemistry test method and device under plate-shape metal sample high stress
CN210108861U (en) * 2019-06-18 2020-02-21 西北大学 Constant load stress corrosion crack propagation multi-scale in-situ monitoring device
CN111141612A (en) * 2020-01-21 2020-05-12 鞍钢股份有限公司 Device and method for testing hydrogen sulfide stress corrosion resistance of oil well pipe
CN111721632A (en) * 2020-06-11 2020-09-29 重庆大学 Drilling pressure integrated test device and method for simulating rock burst
CN113866083A (en) * 2021-08-16 2021-12-31 中山大学 Corrosion device for simulating combined action of dynamic microorganisms and stress
CN115950810A (en) * 2022-05-30 2023-04-11 西南石油大学 Pipeline stress corrosion experiment device and using method thereof
CN116046537A (en) * 2023-02-13 2023-05-02 西南石油大学 Stress corrosion micro-area in-situ test device and method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8474324B2 (en) * 2011-11-30 2013-07-02 King Fahd University Of Petroleum And Minerals Stress corrosion cracking testing device

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0311522A1 (en) * 1987-10-08 1989-04-12 Avions Marcel Dassault-Breguet Aviation Device for clamping two structure elements to be assembled
CN200944089Y (en) * 2006-01-18 2007-09-05 宝山钢铁股份有限公司 Device for preventing specimen distortion adapted for stress test
CN101178343A (en) * 2007-11-30 2008-05-14 山东大学 Brittle material test member felted axis pulling experiment positioning apparatus
CN101608995A (en) * 2008-06-20 2009-12-23 宝山钢铁股份有限公司 The measuring method of galvanic corrosion and sample thereof under the high-stress state of welded tube weld seam
CN103323387A (en) * 2013-06-25 2013-09-25 沈阳建筑大学 Electro-chemical corrosion simulator with in-situ loading
CN103543066A (en) * 2013-10-24 2014-01-29 山东大学 Sleeve-spliced rock direct tensile test device and method
CN103926146A (en) * 2014-04-11 2014-07-16 西南石油大学 Constant-load stress corrosion testing device of small test sample and testing method thereof
CN109507100A (en) * 2018-11-23 2019-03-22 北京航空航天大学 Corrosion electrochemistry test method and device under plate-shape metal sample high stress
CN210108861U (en) * 2019-06-18 2020-02-21 西北大学 Constant load stress corrosion crack propagation multi-scale in-situ monitoring device
CN111141612A (en) * 2020-01-21 2020-05-12 鞍钢股份有限公司 Device and method for testing hydrogen sulfide stress corrosion resistance of oil well pipe
CN111721632A (en) * 2020-06-11 2020-09-29 重庆大学 Drilling pressure integrated test device and method for simulating rock burst
CN113866083A (en) * 2021-08-16 2021-12-31 中山大学 Corrosion device for simulating combined action of dynamic microorganisms and stress
CN115950810A (en) * 2022-05-30 2023-04-11 西南石油大学 Pipeline stress corrosion experiment device and using method thereof
CN116046537A (en) * 2023-02-13 2023-05-02 西南石油大学 Stress corrosion micro-area in-situ test device and method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
A comprehensive assessment of the galvanic corrosion behavior of an electrically assisted pressure joint of dissimilar stainless steel alloys under uniaxial tensile stress;Sam Yaw Anaman 等;journal of materials research and technology;全文 *

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