Corrosion resistance detection device for silicon carbide ceramic

Abstract

The utility model discloses a corrosion resistance detection device for silicon carbide ceramics, which relates to the technical field of silicon carbide ceramics and comprises a detection frame, a transparent solution tank arranged at the inner bottom of the detection frame and a discharge outlet on the transparent solution tank. Two parallel electric clamping jaws used for clamping silicon carbide ceramics are arranged at the bottom of the bearing plate, one electric clamping jaw is located above the transparent solution tank, a telescopic air cylinder used for driving the bearing plate to ascend and descend is further arranged at the top end of the detection frame, and a piston rod of the telescopic air cylinder is in bolt connection with the bearing plate; and a comparison frame is arranged on one side of the detection frame. The device is provided with the two parallel electric clamping jaws, so that two silicon carbide ceramic samples can be clamped at the same time, during detection, one sample enters the transparent solution tank to be subjected to a corrosion test through descending, and the other sample is positioned outside the transparent solution tank, so that visual observation and comparison are formed.

Description

Technical Field

[0001] The utility model relates to the technical field of silicon carbide ceramics, in particular to a corrosion resistance detection device for silicon carbide ceramics. Background Art

[0002] Silicon carbide ceramics play a key role in industry and technology due to their high hardness, high-temperature resistance, corrosion resistance, and high thermal conductivity. They maintain a flexural strength of 500-600 MPa at 1600°C, and their strength decay rate is only 1 / 5 that of metal materials. The core function of the silicon carbide ceramic corrosion resistance testing device is to simulate extreme chemical environments and accurately quantify the degree of performance degradation of materials in highly corrosive media, providing key data support for material research and development, quality control, and engineering selection.

[0003] When testing silicon carbide ceramics, existing corrosion resistance testing devices place the silicon carbide ceramics in a prepared solution before observation and recording. This makes it impossible to compare the silicon carbide ceramics with the silicon carbide ceramics in a normal state, and thus the detection results cannot be quickly reflected, making the corrosion resistance testing device prone to errors when observing and recording. Utility Model Content

[0004] The purpose of the utility model is to provide a corrosion resistance detection device for silicon carbide ceramics, so as to solve the problem that the corrosion resistance detection device proposed in the above background art is not easy to perform comparative observation when detecting silicon carbide ceramics.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: a device for testing the corrosion resistance of silicon carbide ceramics, comprising a testing frame, a transparent solution tank disposed on the inner bottom of the testing frame, and a discharge port on the transparent solution tank; a carrying plate disposed on the inner top of the testing frame; two parallel electric clamps for clamping silicon carbide ceramics disposed at the bottom of the carrying plate, one of the electric clamps being located above the transparent solution tank; and a telescopic cylinder for driving the carrying plate to rise and fall is further disposed at the top of the testing frame, the piston rod of the telescopic cylinder being bolted to the carrying plate, and the electric clamps being connected to the bottom end of the carrying plate via a disc;

[0006] The electric clamp is also provided with a rotating assembly that drives it to rotate, and the rotating assembly includes a gear ring provided on the outer ring of the disc, a gear meshing between the two gear rings, a driving motor is installed on the top of the carrier plate, the output end of the driving motor is connected to a driving rod through a coupling, and the bottom end of the driving rod is connected to the gear, the disc is connected to the lower end of the carrier plate through a shaft, and the shaft and the disc are connected through a bearing;

[0007] A comparison frame is provided on one side of the detection frame. Two parallel magnifying glasses are provided inside the comparison frame. The two magnifying glasses correspond to the two electric clamps respectively, and the mirror area of ​​the magnifying glasses is larger than the horizontal area of ​​the silicon carbide ceramic.

[0008] Furthermore, a guide rod vertically welded to the detection frame is provided on one side of the comparison frame, and a guide slider is provided on the guide rod. A threaded rod parallel to the guide rod is provided on one side of the guide rod, and a rotating handwheel is connected to the top of the threaded rod. A displacement nut is threadedly connected to the surface of the threaded rod, and the guide slider is fixed to the displacement nut. One end of the displacement nut is welded to the comparison frame, and the other side of the comparison frame is slidably connected to the detection frame through a slider groove.

[0009] Furthermore, connecting rods are provided on both sides of the magnifying glass, and slides are opened on both sides of the comparison frame. The ends of the two connecting rods slide in the two slides respectively. The ends of the connecting rods are provided with spring pins, and a number of pin holes are opened equidistantly from top to bottom inside the slide.

[0010] Furthermore, the telescopic cylinders are symmetrically distributed on the top of the detection frame.

[0011] Furthermore, the electric gripper is a servo two-finger gripper.

[0012] Furthermore, the electric clamp includes a fixed clamping plate and a movable clamping plate installed at the lower end of the disc, and the sides of the movable clamping plate and the fixed clamping plate facing away from each other are both provided with anti-slip strips. A waist groove is provided on the disc, and the top of the movable clamping plate is connected to a sliding bar passing through the waist groove. One end of the sliding bar passing through the waist groove is connected to the sliding plate placed on the disc, and one side of the sliding plate is connected to an electric push rod installed on the disc.

[0013] Furthermore, a rectangular cover is installed at the bottom of the disc, and the rectangular cover is also equipped with a waist groove. The fixed clamping plate and the sliding bar pass through the rectangular cover and the waist groove on the rectangular cover respectively.

[0014] Furthermore, a bolt is threadedly connected between the rotating handwheel and the guide rod to limit the rotating handwheel.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] This silicon carbide ceramic corrosion resistance testing device is equipped with two parallel electric grippers, which can simultaneously clamp two silicon carbide ceramic samples. During testing, one sample is lowered into a transparent solution tank for corrosion testing, while the other sample is outside the transparent solution tank, forming an intuitive observation and comparison. During the test, a two-stage lifting magnifying glass is equipped to observe small changes in the sample. The electric grippers clamp the sample from the inside, so as not to affect the outside of the sample. Specifically:

[0017] First, the silicon carbide ceramic sample is clamped and moved, so that one of the clamped silicon carbide ceramic samples can be placed in the transparent solution tank for testing. At the same time, the rotating hand wheel can be rotated so that the rotating hand wheel can rotate the connected threaded rod, so that the threaded rod can move the displacement nut threaded on the surface when it is rotated, so that the displacement nut can move the connected comparison frame when it moves, and the comparison frame can move the magnifying glass set inside when it moves, so that the magnifying glass can appear on one side of the silicon carbide ceramic sample, and then the silicon carbide ceramic sample can be magnified and displayed, so that the silicon carbide ceramic sample being tested and the silicon carbide ceramic sample in a normal state can be magnified. By comparing and observing silicon carbide ceramic samples, the changes under different corrosion conditions can be clearly observed, and the magnifying glass can be pulled so that the connecting rod can be moved when the magnifying glass moves, so that the spring pin arranged inside the connecting rod can be contracted. Then, after the displacement reaches the appropriate position, the position of the magnifying glass can be limited by resetting the spring pin, so that the magnifying glass can select different heights for comparative observation according to the user's habits, and the movement of the comparison frame can realize the observation of the status of different areas, so that the corrosion resistance detection device can not only have a good comparative observation effect when in use, but also have a good adjustment observation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front-view three-dimensional structural diagram of the utility model;

[0019] Figure 2 This is a schematic diagram of the rear-view stereoscopic structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the three-dimensional structure of the comparison frame of the utility model;

[0021] Figure 4 This is a schematic diagram of the three-dimensional structure of the silicon carbide ceramic sample after clamping in the present invention;

[0022] Figure 5 This is a schematic diagram of the three-dimensional structure of the electric gripper of the utility model;

[0023] Figure 6 For this utility model Figure 3 Enlarged structural diagram at point B in the middle.

[0024] In the figure: 1. Detection frame; 2. Transparent solution tank; 3. Discharge port; 4. Carrying plate; 5. Electric clamp; 6. Comparison frame; 7. Magnifying glass; 8. Guide rod; 9. Rotating handwheel; 10. Threaded rod; 11. Displacement nut; 12. Connecting rod; 13. Spring pin; 14. Telescopic cylinder; 15. Disc; 16. Shaft; 17. Fixed clamping plate; 18. Movable clamping plate; 19. Anti-slip strip; 20. Sliding plate; 21. Electric push rod; 22. Gear ring; 23. Gear; 24. Drive motor; 25. Drive rod; 26. Silicon carbide ceramic sample. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figures 1-6 The utility model provides a technical solution: a corrosion resistance detection device for silicon carbide ceramics, comprising a detection frame 1, a transparent solution tank 2 arranged at the inner bottom of the detection frame 1, and a discharge port 3 on the transparent solution tank 2. In addition, the transparent solution tank 2 can also be equipped with an air inlet valve and an exhaust valve for filling the transparent solution tank 2 with corrosive gas. The inner top of the detection frame 1 is provided with a carrying plate 4, and the bottom of the carrying plate 4 is provided with two parallel electric clamps 5 for clamping silicon carbide ceramics, one of the electric clamps 5 is located above the transparent solution tank 2, and the top of the detection frame 1 is also provided with a symmetrical telescopic cylinder 14 for driving the carrying plate 4 to rise and fall. The piston rods of the two telescopic cylinders 14 are bolted to the carrying plate 4, and the two telescopic cylinders 14 are synchronously controlled by the same air circuit control valve and are equipped with a travel switch. Here, the synchronous control of the two telescopic cylinders 14 through the same air circuit control valve and the control of the travel by the travel switch belong to the existing control technology, so they will not be described in detail here.

[0027] After the telescopic cylinder 14 drives the carrying plate 4 to descend, the silicon carbide ceramic sample clamped by one of the electric grippers 5 enters the transparent solution tank 2, while the other silicon carbide ceramic sample is outside the transparent solution tank 2;

[0028] A comparison frame 6 is provided on one side of the detection frame 1. Two parallel magnifying glasses 7 are provided inside the comparison frame 6. The two magnifying glasses 7 correspond to the two electric clamps 5 respectively, and the mirror area of ​​the magnifying glasses 7 is larger than the horizontal area of ​​the silicon carbide ceramic. The surface changes of the silicon carbide ceramic sample 26 clamped by the electric clamps 5 are observed through the magnifying glasses 7, and at the same time, samples in two different corrosion concentration environments can be compared and observed.

[0029] exist Figure 1 、 Figure 2 and Figure 3 In the embodiment, since the electric gripper 5 drives the sample to move up and down, in order to facilitate observation of the corrosion changes of the sample in three different situations, namely, before the sample enters the transparent solution tank 2, in the transparent solution tank 2, and after the sample exits the transparent solution tank 2, through the magnifying glass 7, the position of the magnifying glass 7 can be changed along with the position of the sample, as follows:

[0030] A guide rod 8 vertically welded to the detection frame 1 is provided on one side of the comparison frame 6, and a guide slider is provided on the guide rod 8. A threaded rod 10 parallel to the guide rod 8 is provided on one side of the guide rod 8. The top of the threaded rod 10 is connected to a rotating handwheel 9, and the surface of the threaded rod 10 is threadedly connected to a displacement nut 11. The guide slider is fixed to the displacement nut 11, one end of the displacement nut 11 is welded to the comparison frame 6, and the other side of the comparison frame 6 is slidably connected to the detection frame 1 through a slider slot. A manual screw reciprocating structure is formed between the threaded rod 10, the displacement nut 11, the guide rod 8 and the rotating handwheel 9, that is, by manually controlling the rotating handwheel 9, the comparison frame 6 can be driven to rise and fall, so that the magnifying glass 7 in the comparison frame 6 is always kept at the same height as the sample.

[0031] In the above description, the position change of the magnifying glass 7 is determined by the lifting and lowering of the comparison frame 6. In order to further control the progress of the position change of the magnifying glass 7, the magnifying glass 7 itself can also be manually raised and lowered on the comparison frame 6, as follows:

[0032] Connecting rods 12 are provided on both sides of the magnifying glass 7, and slideways are provided on both sides of the comparison frame 6. The ends of the two connecting rods 12 slide in the two slideways respectively. The ends of the connecting rods 12 are provided with spring pins 13, and the interior of the slideway is provided with a plurality of pin holes equidistantly from top to bottom.

[0033] That is, when the magnifying glass 7 is manually pushed upward or downward, the magnifying glass 7 can rise or fall in the comparison frame 6, and a number of pin holes are equidistantly provided inside the slide from top to bottom. When sliding to a certain position, the spring pin 13 can be pressed so that the pin rod of the spring pin 13 enters the pin hole at the corresponding position, thereby positioning the magnifying glass 7 there. The spring pin 13 is a common positioning pin on the market, also known as a press-type spring plunger, which belongs to the existing technology. Therefore, the composition structure of the spring pin 13 will not be described in detail in this case.

[0034] For the electric gripper 5, a servo two-finger gripper available on the market can be used, which is an existing mature technology. Therefore, the servo two-finger gripper will not be described in detail. This gripper can only grip the sample from the outside of the sample.

[0035] In addition, the electric gripper 5 can adopt the following structure, which can clamp and fix the sample from the inside, as follows:

[0036] The electric clamp 5 includes a disc 15 arranged at the bottom end of the carrier plate 4, with a fixed clamping plate 17 and a movable clamping plate 18 mounted at the lower end of the disc 15. The movable clamping plate 18 and the fixed clamping plate 17 are both provided with anti-slip strips 19 on the sides facing away from each other. A waist groove is provided on the disc 15, and a sliding strip passing through the waist groove is connected to the top of the movable clamping plate 18. One end of the sliding strip passing through the waist groove is connected to a sliding plate 20 placed on the disc 15, and one side of the sliding plate 20 is connected to an electric push rod 21 mounted on the disc 15.

[0037] That is, the opening part of the silicon carbide ceramic sample 26 is wrapped around the movable clamping plate 18 and the fixed clamping plate 17, wherein the fixed clamping plate 17 contacts the inner wall of one side of the silicon carbide ceramic sample 26, and at the same time, the electric push rod 21 is started, and the electric push rod 21 pushes the sliding plate 20 to slide on the disc 15, and the sliding plate 20 drives the sliding bar to slide in the waist groove, so that the movable clamping plate 18 gradually moves away from the fixed clamping plate 17 until the movable clamping plate 18 contacts the inner wall of the other side of the silicon carbide ceramic sample 26, and with the cooperation of the anti-slip strip 19, the sample is clamped and fixed from the inside.

[0038] Among them, a rectangular cover is also installed at the bottom of the disc 15 by screws, and the rectangular cover is also equipped with a waist groove. The fixed clamping plate 17 and the sliding bar pass through the rectangular cover and the waist groove on the rectangular cover respectively. That is, after the electric clamp 5 clamps the sample into the transparent solution tank 2, the rectangular cover just seals the upper end opening of the transparent solution tank 2.

[0039] exist Figure 3 、 Figure 4 and Figure 5 In the figure, the electric gripper 5 is also provided with a rotating assembly that drives it to rotate. The rotating assembly includes a gear ring 22 provided on the outer ring of the disc 15. A gear 23 is meshed between the two gear rings 22. A driving motor 24 is installed on the top of the carrier plate 4. The output end of the driving motor 24 is connected to a driving rod 25 through a coupling, and the bottom end of the driving rod 25 is connected to the gear 23. The disc 15 is connected to the lower end of the carrier plate 4 through a shaft 16. The shaft 16 and the disc 15 are connected through a bearing.

[0040] That is, under the action of the driving motor 24, the driving rod 25 drives the gear 23 to rotate, and the gear 23 drives the two electric clamps 5 to rotate, so that the sample corroded by the corrosive liquid or corrosive gas can be rotated to achieve comprehensive observation.

[0041] In the above, in order to meet the transmission strength when carrying ceramics, the meshing module and tooth width of the gear ring 22 and the gear 23 are set according to actual conditions. The setting of the meshing module and tooth width of the gear ring 22 and the gear 23 belongs to the conventional technology of those skilled in the art, so it will not be described in detail in this case. In order to match the observation requirements of corrosion detection, a frequency converter or inverter can be used for the speed adjustment range of the drive motor 24, and an angle sensor can be equipped to realize the positioning of the rotation angle. This is also a mature technology and will not be described in detail in this case.

[0042] In addition, in the accompanying drawings, the silicon carbide ceramic sample 26 is only an example of silicon carbide ceramics. Its shape is not limited to rectangles, but can also be irregular or have some special shapes, such as various ceramic bottles.

[0043] To sum up, silicon carbide ceramics play a key role in the fields of industry and science and technology due to their high hardness, high temperature resistance, corrosion resistance, high thermal conductivity and other characteristics. By clamping the silicon carbide ceramic sample 26 and moving it into the transparent solution tank 2, and rotating the handwheel 9 at the same time, the threaded rod 10 can move the comparison frame 6 and the magnifying glass 7 through the displacement nut 11, so that after moving and adjusting to the appropriate position, the sample under test and the normal sample can be compared and observed. At the same time, the magnifying glass 7 can be pulled up and down so that the magnifying glass 7 can be fine-tuned, so that it can be quickly adjusted to the required comparison observation area, and the changes under different corrosion conditions can be clearly observed. Therefore, the corrosion resistance detection device not only has a good comparison observation effect when detecting the silicon carbide ceramic sample 26, but also has a good adjustment effect. The content not described in detail in this description belongs to the existing technology known to professional and technical personnel in this field.

[0044] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for detecting the corrosion resistance of silicon carbide ceramics, comprising a detection frame (1), a transparent solution tank (2) arranged on the inner bottom of the detection frame (1), and a discharge port (3) on the transparent solution tank (2), characterized in that: The inner top of the detection frame (1) is provided with a bearing plate (4), and the bottom of the bearing plate (4) is provided with two parallel electric clamps (5) for clamping silicon carbide ceramics, one of the electric clamps (5) is located above the transparent solution tank (2), and the top of the detection frame (1) is also provided with a telescopic cylinder (14) for driving the bearing plate (4) to rise and fall, the piston rod of the telescopic cylinder (14) is bolted to the bearing plate (4), and the electric clamp (5) is connected to the bottom end of the bearing plate (4) through the disc (15); The electric clamp (5) is also provided with a rotating assembly for driving the rotation thereof, the rotating assembly comprising a gear ring (22) provided on the outer ring of the disc (15), a gear (23) meshing between the two gear rings (22), a driving motor (24) being installed on the top of the carrier plate (4), an output end of the driving motor (24) being connected to a driving rod (25) via a coupling, and a bottom end of the driving rod (25) being connected to the gear (23), the disc (15) being connected to the lower end of the carrier plate (4) via a shaft (16), and the shaft (16) and the disc (15) being connected via a bearing; A comparison frame (6) is provided on one side of the detection frame (1), and two parallel magnifying glasses (7) are provided inside the comparison frame (6). The two magnifying glasses (7) correspond to the two electric grippers (5) respectively, and the mirror area of ​​the magnifying glasses (7) is larger than the horizontal area of ​​the silicon carbide ceramic.

2. The corrosion resistance detection device for silicon carbide ceramics according to claim 1, characterized in that: A guide rod (8) vertically welded to the detection frame (1) is provided on one side of the comparison frame (6), a guide slider is provided on the guide rod (8), a threaded rod (10) parallel to the guide rod (8) is provided on one side of the guide rod (8), a rotating hand wheel (9) is connected to the top of the threaded rod (10), a displacement nut (11) is threadedly connected to the surface of the threaded rod (10), the guide slider is fixed to the displacement nut (11), one end of the displacement nut (11) is welded to the comparison frame (6), and the other side of the comparison frame (6) is slidably connected to the detection frame (1) through a slider slot.

3. The corrosion resistance detection device for silicon carbide ceramics according to claim 1, characterized in that: Connecting rods (12) are provided on both sides of the magnifying glass (7), and slideways are provided on both sides of the comparison frame (6). The ends of the two connecting rods (12) slide in the two slideways respectively. The ends of the connecting rods (12) are provided with spring pins (13), and a plurality of pin holes are provided in the interior of the slideway at equal intervals from top to bottom.

4. The corrosion resistance detection device for silicon carbide ceramics according to claim 1, characterized in that: The telescopic cylinders (14) are symmetrically distributed on the top of the detection frame (1).

5. The corrosion resistance detection device for silicon carbide ceramics according to claim 1, characterized in that: The electric gripper (5) is a servo two-finger gripper.

6. The corrosion resistance detection device for silicon carbide ceramics according to claim 1, characterized in that: The electric clamp (5) includes a fixed clamping plate (17) and a movable clamping plate (18) installed at the lower end of the disc (15), and the movable clamping plate (18) and the fixed clamping plate (17) are both provided with anti-slip strips (19) on the sides facing away from each other. A waist groove is provided on the disc (15), and a sliding strip passing through the waist groove is connected to the top of the movable clamping plate (18). One end of the sliding strip passing through the waist groove is connected to a sliding plate (20) placed on the disc (15), and one side of the sliding plate (20) is connected to an electric push rod (21) installed on the disc (15).

7. The corrosion resistance detection device for silicon carbide ceramics according to claim 1, characterized in that: A rectangular cover is also installed at the bottom of the disc (15), and the rectangular cover is also equipped with a waist groove. The fixed clamping plate (17) and the sliding bar respectively pass through the rectangular cover and the waist groove on the rectangular cover.

8. The corrosion resistance detection device for silicon carbide ceramics according to claim 2, characterized in that: A bolt is threadedly connected between the rotating hand wheel (9) and the guide rod (8) for limiting the rotating hand wheel (9).

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