Corrosive wear test device

Abstract

The invention discloses a corrosive wear test device which comprises a frame, a lifting system, a heating furnace and a kettle body arranged in the heating furnace, and a kettle cover is fixedly arranged on the frame above the kettle body; a magnetic coupling stirrer is arranged on the kettle cover, a sample holder is arranged below the kettle cover, the sample holder comprises more than two groups of spaced clamps, each group of clamps comprises an upper fixing disc, a lower fixing disc and a plurality of samples, and a plurality of flow baffles which are arranged at intervals in the circumferential direction are arranged between the lower fixing discs and the upper fixing discs of two adjacent groups of clamps; a plurality of fixing rods are connected with all the upper fixing discs and the lower fixing discs and are fixedly connected with the kettle cover; a stirring rod of the magnetic coupling stirrer penetrates through the kettle cover, all the upper fixing discs and all the lower fixing discs, the lower end of the stirring rod is fixedly connected with a folding turbine paddle, and the stirring rod is fixedly connected with a straight paddle; the device not only can ensure that the scouring medium at each position in the device is uniform and stable, but also can perform synchronous test on a large batch of samples, can accurately evaluate the material performance under the severe working conditions of high temperature, corrosive medium and erosive wear, and is convenient to mount and dismount.

Description

Technical Field

[0001] The invention relates to a corrosion and wear test device, in particular to a corrosion and wear test device used under high temperature and high pressure working conditions. Background Art

[0002] With the development of science and technology, the application areas of new materials are increasing day by day, and the service conditions of materials are becoming more and more severe, especially in the metallurgical and chemical industries. Materials are affected by many factors such as high temperature, high pressure, medium corrosion, erosion and wear, which further increases the requirements for material evaluation methods.

[0003] At present, there are two types of corrosion and wear test equipment: static coupon test in corrosive medium under normal temperature or high temperature environment. The test conditions are relatively simple and cannot comprehensively evaluate the service characteristics of materials in multi-factor environment. The other type is dynamic corrosion and wear test equipment, which is basically under normal temperature environment and the wear mode is mostly friction wear, which is quite different from the erosion wear in actual engineering. The rare erosion and wear test equipment is difficult to maintain the stability of the erosion state of each sample. It is not only inconvenient to install and disassemble, but also the sample volume is small in one test. The erosion medium is also uneven, making it difficult to accurately evaluate the material performance. Summary of the invention

[0004] The purpose of the present invention is to provide a corrosion and wear testing device in view of the above-mentioned deficiencies in the prior art, which can not only ensure that the scouring medium at each position inside the device is uniform and stable, but also can carry out synchronous testing of a large number of samples, can accurately evaluate the material performance under harsh working conditions of high temperature, corrosive medium, scouring and wear, and is easy to install and disassemble.

[0005] In order to achieve the above-mentioned purpose, a corrosion and wear test device of the present invention comprises a frame, a heating furnace connected to the frame through a lifting system, and a kettle body fixed in the heating furnace, a kettle cover is fixed on the frame above the kettle body, the kettle body and the kettle cover are provided with a connecting flange, and the inner cavity of the kettle body is provided with an arc-shaped bottom; characterized in that: a magnetic coupling stirrer is provided on the kettle cover, a sample rack is provided below the kettle cover, the sample rack comprises more than two groups of spaced fixtures, each group of fixtures comprises an upper fixed plate, a lower fixed plate and a plurality of samples clamped therebetween, a plurality of baffles arranged at intervals in the circumferential direction are provided between the lower fixed plates and the upper fixed plates of two adjacent groups of fixtures, a plurality of fixing rods connect all the upper fixed plates and the lower fixed plates, and are fixedly connected to the kettle cover; a stirring rod of the magnetic coupling stirrer passes through the center of the kettle cover and all the upper fixed plates and the lower fixed plates, a folding turbine propeller is fixedly connected to the stirring rod below the lowermost lower fixed plate, and a straight blade is fixedly connected to the stirring rod between the lower fixed plates and the upper fixed plates of two adjacent groups of fixtures, and the straight blade is located between the plurality of baffles.

[0006] The present invention uses a lifting system to make the heating furnace rise, and connects the kettle body and the kettle cover through a flange; starts the magnetic coupling agitator and the heating furnace, heats and stirs the test liquid in the kettle, and performs scouring and wear tests on the samples; because each sample is fixed between the upper fixed plate and the lower fixed plate, the folding turbine impeller interacts with the arc-shaped bottom surface of the kettle to ensure that the particles in the liquid do not sink to the bottom, and the straight blades make the particles and the medium in the kettle evenly mixed, and the baffle can reduce the centrifugal effect of the particles and prevent the particles from depositing on the inner wall of the kettle. The stirring rod of the magnetic coupling agitator rotates with the magnetic field to stir the liquid, and its force is controllable, which can achieve the stability of the flow state, is suitable for long-term tests, can ensure that the scouring medium at each position inside the device is uniform and stable, and can perform synchronous tests on a large number of samples, and can accurately evaluate the material performance under high temperature, corrosive media, and scouring and wear harsh working conditions; As a further improvement of the present invention, the lower fixed plate and the upper fixed plate of the same set of fixtures are provided with a plurality of grooves at one end adjacent to each other, and both ends of each sample are inserted into the grooves of the lower fixed plate and the upper fixed plate, and a resin gasket is provided between the sample and the groove; the sample is convenient to install, and the resin gasket can prevent galvanic corrosion of the sample; As a further improvement of the present invention, the plurality of baffles are arranged at intervals and are evenly distributed in the circumferential direction; this can further prevent particles from being deposited on the inner wall of the kettle body; As a further improvement of the present invention, the fixing rod is a screw rod, which passes through all the upper fixing plates and the lower fixing plates, and the upper end of the screw rod is fixedly connected to the kettle cover by a thread, and a fastening nut is provided on the fixing rod above the uppermost fixing plate; it is convenient to install and remove the sample; In summary, the present invention can not only ensure that the flushing medium at each position inside the device is uniform and stable, but also can carry out synchronous testing of large quantities of samples, can accurately evaluate the material performance under harsh working conditions of high temperature, corrosive media, flushing and wear, and is easy to install and disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a front view of an embodiment of the present invention.

[0008] Figure 2 for Figure 1 Left view of .

[0009] Figure 3 for Figure 1 Enlarged view of point A in the middle.

[0010] Figure 4 for Figure 3 BB cross-sectional view.

[0011] Figure 5 for Figure 3 CC cross-sectional view.

[0012] Figure 6This is a disassembled stereoscopic view of the heating furnace and kettle body according to an embodiment of the present invention. DETAILED DESCRIPTION

[0013] The present invention is further described below in conjunction with the accompanying drawings.

[0014] like Figures 1 to 6 As shown, a corrosion and wear test device of this embodiment comprises a frame 1, a heating furnace 3 connected to the frame 1 through a lifting system 2, and a kettle body 4 fixed in the heating furnace 3. A kettle cover 5 is fixed on the frame above the kettle body 4. The kettle body 4 and the kettle cover 5 are provided with a connecting flange 6. The inner cavity of the kettle body 4 is provided with an arc-shaped bottom 7; a magnetic coupling stirrer 8 is provided on the kettle cover 5, and a sample rack 21 is provided below the kettle cover 5. The sample rack 21 comprises three groups of spaced fixtures 9, each group of fixtures 9 comprises an upper fixed plate 10 and a lower fixed plate 11, and the lower fixed plate 11 of the same group is provided with a plurality of grooves at one end adjacent to the upper fixed plate 10, and both ends of a plurality of samples 12 are inserted into the grooves of the lower fixed plate 11 and the upper fixed plate 10, and a resin gasket 13 is provided between the sample 12 and the groove; A number of baffles 14 are arranged evenly and at intervals in the circumferential direction between the lower fixed disks 11 and the upper fixed disks 10 of the two adjacent groups of clamps 9. A number of fixing rods 15 with screw structures pass through the three groups of upper fixing disks 10 and the lower fixing disks 11, and the upper ends thereof are fixedly connected to the kettle cover 5 by threads. A fastening nut 16 is provided on the fixing rod 15 above the uppermost upper fixing disk 10. The stirring rod 17 of the magnetic coupling stirrer 8 passes through the center of the kettle cover 5 and all the upper fixing disks 10 and the lower fixing disks 11. A folding turbine paddle 18 is fixedly connected to the stirring rod 17 below the lowermost lower fixing disk 11. Straight blades 19 are fixedly connected to the stirring rods 17 between the lower fixing disks 11 and the upper fixing disks 10 of the two adjacent groups of clamps 9. The straight blades 19 are located between the several baffles 14 on the same layer.

[0015] The lifting system 2 of the present invention can be a gear rack mechanism, a sprocket chain mechanism or a hydraulic lifting rod, and the heating furnace 3 can be a resistance wire heating furnace or an oil bath heating furnace, which are all existing technologies; the lifting system of this embodiment adopts a sprocket chain mechanism, and the sprocket is rotated by the hand wheel 22 to make the heating furnace 3 rise and fall; if a hydraulic lifting rod is used, the heating furnace 3 is driven by its piston rod to rise and fall; the kettle body 4 adopts SB 265Gr.7 (national standard TA9), this material has excellent corrosion resistance in oxidizing media and high corrosion resistance in reducing media, can meet the material corrosion test in harsh environments such as sulfuric acid and acetic acid, and has excellent corrosion resistance and sufficient strength under high temperature and high pressure; when in use, add the test corrosive liquid into the kettle body 4, and use the lifting system 2 to make the heating furnace 3 and the kettle body 4 rise, and connect the kettle body 4 and the kettle cover 5 through the flange 6 and bolts; start the magnetic coupling stirrer 8 and the heating furnace 3, heat and stir the test liquid in the kettle, and perform the scouring and wear test on the sample 12; because each sample 12 is fixed between the upper fixed plate 10 and the lower fixed plate 11, the inclined folding turbine impeller 18 interacts with the arc-shaped kettle bottom surface 7 to ensure that the liquid The particles in the body do not sink to the bottom, and the synchronously rotating straight blades 19 make the particles and the medium evenly mixed. The baffles 14 arranged at annular intervals can reduce the centrifugal effect of the particles and prevent the particles from depositing on the inner wall of the kettle. In addition, the stirring rod 17 of the magnetic coupling stirrer 8 rotates with the magnetic field to stir the liquid. Its strength is easy to control, which can achieve the stability of the liquid flow state and ensure that the flushing medium at each position inside the device is uniform and stable. The baffles 14 also provide support for the fixed plates on both sides, which can improve the rigidity of the entire sample rack. The test liquid acts on the sample more stably. Each sample 12 can be subjected to uniform corrosion, scouring and wear tests for a long time. Multiple sets of fixtures 9 can be used for synchronous testing of a large number of samples, so as to accurately evaluate the material performance under high temperature, corrosive media, and scouring and wear harsh working conditions; The grooves of the lower fixing plate 11 and the upper fixing plate 10 facilitate the installation of the sample 12, and the resin gasket 13 can prevent the sample from galvanic corrosion; the screw-type fixing rod 15 and the fastening nut 16 facilitate the installation and removal of the sample; The above embodiments are used for illustration, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the present invention to the scope of the described embodiments.

Claims

1. A corrosion and wear test device, comprising a frame, a heating furnace connected to the frame through a lifting system, a kettle body fixed in the heating furnace, a kettle cover fixed on the frame above the kettle body, a connecting flange is provided between the kettle body and the kettle cover, and an arc-shaped bottom is provided in the inner cavity of the kettle body; the characteristics are: A magnetic coupling stirrer is arranged on the kettle cover, and a sample rack is arranged under the kettle cover. The sample rack includes more than two groups of spaced clamps, each group of clamps includes an upper fixed plate, a lower fixed plate and a plurality of samples clamped therebetween, a plurality of baffles arranged at intervals in the circumferential direction are arranged between the lower fixed plate and the upper fixed plate of two adjacent groups of clamps, a plurality of fixing rods connect all the upper fixed plates and the lower fixed plates, and are fixedly connected to the kettle cover; a stirring rod of the magnetic coupling stirrer passes through the center of the kettle cover and all the upper fixed plates and the lower fixed plates, a folding turbine propeller is fixedly connected to the stirring rod below the lowermost lower fixed plate, and a straight blade is fixedly connected to the stirring rod between the lower fixed plate and the upper fixed plate of two adjacent groups of clamps, and the straight blade is located between the plurality of baffles.

2. A corrosion and wear testing device as claimed in claim 1, characterized in that: The lower fixing plate of the same set of fixtures is provided with a plurality of grooves at one end adjacent to the upper fixing plate, and both ends of each sample are inserted into the grooves of the lower fixing plate and the upper fixing plate, and a resin gasket is provided between the sample and the groove.

3. A corrosion and wear testing device according to claim 1 or 2, characterized in that: The plurality of baffles are arranged at even intervals in the circumferential direction.

4. A corrosion and wear testing device as claimed in claim 3, characterized in that: The fixing rod is a screw rod, which passes through all the upper fixing plates and the lower fixing plates, and the upper end of the screw rod is fixedly connected to the kettle cover through a thread, and a fastening nut is arranged on the fixing rod above the uppermost fixing plate.

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