Testing device for researching annular corrosive wear

Abstract

The utility model relates to the field of corrosive wear test devices, in particular to a test device for researching annular corrosive wear. In the device, a circumferential driving unit is provided with a first frequency converter, a first motor and a shifting block, a longitudinal driving unit is provided with a second frequency converter, a second motor, a special-shaped lever and a crankshaft, a load unit is provided with a sample, a disc-shaped weight and a weight clamp, and a medium holding unit is provided with a funnel, a water pump, a water pipe, a counter-grinding piece, a container and a liquid medium. Before a test, a sample passes through a counter-grinding piece, and a disc-shaped weight is installed; starting a water pump to fill a liquid medium between the sample and the grinding piece; the first frequency converter and the second frequency converter set the frequency of circumferential movement and longitudinal movement, then the first motor and the second motor are started, the sample is driven to do circumferential movement and longitudinal movement at the same time, and annular grinding marks are achieved. The utility model solves the blank of research equipment for researching annular corrosive wear of tubular or rod-shaped samples at present, and is suitable for research in the field of corrosive wear.

Description

Technical Field

[0001] The utility model relates to the field of corrosion and wear test devices, in particular to a test device for studying annular corrosion and wear. Background Art

[0002] In the prior art, the test device formed for corrosion and wear test can only be used for a single type of corrosion and wear test. The annular corrosion and wear of tubular or rod-shaped specimens includes both circumferential and longitudinal movements, and there is no standard specimen method and device. The difficulty of this device is that it needs to achieve circumferential and longitudinal movements at the same time, and the movement frequency can be controlled; it needs to achieve precise loading to achieve quantitative testing. Utility Model Content

[0003] The utility model aims to provide a test device for studying annular corrosion and wear, which is aimed at tubular or rod-shaped samples and can make them complete circumferential and longitudinal movements of a certain frequency at the same time under a certain load, so that the annular corrosion and wear test research can be carried out quantitatively.

[0004] The technical solution of the utility model is:

[0005] A test device for studying annular corrosion wear, the device comprises a circumferential drive unit, a longitudinal drive unit, a load unit, and a medium holding unit. The circumferential drive unit is provided with a first frequency converter, a first motor, and a toggle block. The longitudinal drive unit is provided with a second frequency converter, a second motor, a special-shaped lever, and a crankshaft. The load unit is provided with a sample, a disc-shaped weight, and a weight fixture. The medium holding unit is provided with a funnel, a water pump, a water pipe, a wear piece, a container, and a liquid medium. The specific structure is as follows:

[0006] The input end of the first motor is connected to the first frequency converter, and the output end of the first motor is connected to the toggle block. The toggle block is slidably matched with the upper end of the vertical sample through the center hole and frictionally transmitted. The lower end of the sample extends into the liquid medium in the container and corresponds to one end of the special-shaped lever. A water pump is provided in the liquid medium; the input end of the second motor is connected to the second frequency converter, and the output end of the second motor is connected to the crankshaft, which corresponds to the other end of the special-shaped lever; the funnel, the grinding piece, the grinding piece fixture, the disc-shaped weight and the weight fixture are sleeved on the sample from top to bottom, the funnel is an upper and lower opening structure, the upper end of the water pipe corresponds to the upper opening of the funnel, the lower end of the water pipe is connected to the water pump in the container, the lower end of the funnel is located at the upper end of the grinding piece, a gap is provided between the grinding piece and the sample, the lower opening of the funnel corresponds to the gap, the grinding piece fixture is clamped on the lower outer side of the grinding piece, and the disc-shaped weight is clamped to the sample through the weight fixture and is located below the grinding piece.

[0007] The described test device for studying circular corrosion wear further includes a bracket, which is provided with a counter-piece fixture, a base, a column, and a cross beam. The base is provided with a container and a column. The column is located on one side of the container. One end of the cross beam is connected to the upper end of the column, and the other end of the cross beam is connected to the counter-piece fixture.

[0008] The described test device for studying circular corrosion wear is an integral structure composed of a fulcrum, a left inclined rod, a right inclined rod, a left cross bar, and a right cross bar. The two sides of the fulcrum are respectively connected to one end of the downward-inclined left inclined rod and right inclined rod. The other end of the left inclined rod is connected to the left cross bar, and the other end of the right inclined rod is connected to the right cross bar. The upper surface of the left cross bar corresponds to the lower end of the specimen, and the upper surface of the right cross bar corresponds to the crankshaft. The fulcrum is located above the upper edge of the container.

[0009] The specimen of the described test device for studying circular corrosion wear is a tubular or rod-shaped specimen.

[0010] The usage method of the described test device for studying circular corrosion wear: The circumferential drive unit uses a first frequency converter to control a first motor to drive a toggle block to rotate, driving the tubular or rod-shaped specimen to perform a circumferential circular motion, and the circumferential motion frequency is controlled by adjusting the first frequency converter; the longitudinal motion unit uses a second frequency converter to control a second motor to drive the crankshaft to rotate. When the long end of the crankshaft contacts the special-shaped lever, it pries the specimen to perform a longitudinal up-and-down motion, and the longitudinal motion frequency is controlled by adjusting the second frequency converter, and the longitudinal motion distance is controlled by adjusting the shape of the crankshaft; the load unit uses a weight fixture to fix a disc-shaped weight, and the disc-shaped weight is installed in the middle of the specimen by using the weight fixture to achieve quantitative loading; the liquid medium of the medium holding unit is placed in the container, and the liquid medium is pumped from the container through a water pipe to the upper funnel by a water pump, and the liquid medium flows back to the container from between the specimen and the counter-piece, so that the specimen is always in the liquid medium.

[0011] The usage method of the described test device for studying circular corrosion wear: Before the test, the specimen passes through the counter-piece and the disc-shaped weight is installed; the water pump is started to fill the space between the specimen and the counter-piece with the liquid medium; the first frequency converter and the second frequency converter are set with the circumferential motion and longitudinal motion frequencies, and then the first motor and the second motor are started to drive the specimen to perform circumferential and longitudinal motions simultaneously to achieve circular wear marks.

[0012] The present utility model has the following advantages and beneficial effects:

[0013] 1. The present utility model selects frequency converters to control the circumferential and longitudinal motions respectively, which can accurately control the corrosion wear frequency and can also arbitrarily adjust the ratio of the circumferential motion to the longitudinal motion.

[0014] 2. The present utility model adopts a self-designed disc-shaped weight, which is convenient for the control and adjustment of the load.

[0015] 3. The medium holding unit of the present utility model uses the method of internal circulation of liquid medium to keep the specimen in the liquid medium all the time. Compared with the traditional fully immersed design, it saves liquid medium and facilitates the replacement of the specimen. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of the present utility model.

[0017] Figure 2 It is a schematic structural diagram of the special-shaped lever of the present utility model.

[0018] In the figure: 1. First frequency converter; 2. Second frequency converter; 3. First motor; 4. Second motor; 5. Poking block; 6. Hopper; 7. Water pump; 8. Water pipe; 9. Counterpart abrasive; 10. Disc-shaped weight; 11. Specimen; 12. Special-shaped lever; 13. Crankshaft; 14. Weight clamp; 15. Container; 16. Bracket; 17. Counterpart abrasive clamp; 18. Base; 19. Column; 20. Cross beam; 21. Liquid medium; 22. Fulcrum; 23. Left inclined rod; 24. Right inclined rod; 25. Left cross bar; 26. Right cross bar. Detailed Embodiment

[0019] As Figure 1 shown, for tubular or rod-shaped specimens, the present utility model proposes a test device for studying circular corrosion wear. The device includes a circumferential driving unit, a longitudinal driving unit, a load unit, a medium holding unit and a bracket. The circumferential driving unit is provided with a first frequency converter 1, a first motor 3 and a poking block 5. The longitudinal driving unit is provided with a second frequency converter 2, a second motor 4, a special-shaped lever 12 and a crankshaft 13. The load unit is provided with a specimen 11, a disc-shaped weight 10 and a weight clamp 14. The medium holding unit is provided with a hopper 6, a water pump 7, a water pipe 8, a counterpart abrasive 9, a container 15 and a liquid medium 21. The bracket 16 is provided with a counterpart abrasive clamp 17, a base 18, a column 19 and a cross beam 20. The specific structure is as follows:

[0020] The input end of the first motor 3 is connected to the first frequency converter 1, and the output end of the first motor 3 is connected to the toggle block 5. The toggle block 5 is in sliding fit and friction drive with the upper end of the vertical specimen 11 through a central hole. The lower end of the specimen 11 extends into the liquid medium 21 in the container 15 and corresponds to one end of the special-shaped lever 12. A water pump 7 is arranged in the liquid medium 21. The input end of the second motor 4 is connected to the second frequency converter 2, and the output end of the second motor 4 is connected to the crankshaft 13. The crankshaft 13 corresponds to the other end of the special-shaped lever 12. The funnel 6, the counter grinding piece 9, the counter grinding piece fixture 17, the disc-shaped weight 10, and the weight fixture 14 are sleeved on the specimen 11 from top to bottom. The funnel 6 has an upper and a lower opening. The upper end of the water pipe 8 corresponds to the upper opening of the funnel 6, and the lower end of the water pipe 8 is connected to the water pump 7 in the container 15. The lower end of the funnel 6 is located above the upper end of the counter grinding piece 9. There is a gap between the counter grinding piece 9 and the specimen 11, and the lower opening of the funnel 6 corresponds to the gap. The counter grinding piece fixture 17 clamps the outer side of the lower part of the counter grinding piece 9. The disc-shaped weight 10 is clamped on the specimen 11 by the weight fixture 14 and is located below the counter grinding piece 9. The container 15 and the column 19 are arranged on the base 18. The column 19 is located on one side of the container 15. One end of the cross beam 20 is connected to the upper end of the column 19, and the other end of the cross beam 20 is connected to the counter grinding piece fixture 17.

[0021] As Figure 2 shown, the special-shaped lever 12 is an integral structure composed of a fulcrum 22, a left inclined rod 23, a right inclined rod 24, a left cross bar 25, and a right cross bar 26. Both sides of the fulcrum 22 are respectively connected to one ends of the downwardly inclined left inclined rod 23 and right inclined rod 24. The other end of the left inclined rod 23 is connected to the left cross bar 25, and the other end of the right inclined rod 24 is connected to the right cross bar 26. The upper surface of the left cross bar 25 corresponds to the lower end of the specimen 11, and the upper surface of the right cross bar 26 corresponds to the crankshaft 13. The fulcrum 22 is located above the upper edge of the container 15.

[0022] As Figure 1 - Figure 2 shown, the working principle and usage method of the present utility model are as follows:

[0023] The circumferential drive unit uses the first frequency converter 1 to control the first motor 3 to drive the toggle block 5 to rotate, driving the tubular or rod-shaped specimen 11 to perform a circumferential circular motion. The circumferential motion frequency can be controlled by adjusting the first frequency converter 1. The longitudinal motion unit uses the second frequency converter 2 to control the second motor 4 to drive the crankshaft 13 to rotate. When the long end of the crankshaft 13 contacts the special-shaped lever 12, it pries the specimen 11 to perform a longitudinal up-and-down motion. The longitudinal motion frequency can be controlled by adjusting the second frequency converter 2, and the longitudinal motion distance can be controlled by adjusting the shape of the crankshaft 13. The load unit uses the weight fixture 14 to fix the load. The load is a customized disc-shaped weight 10. The disc-shaped weight 10 is installed in the middle of the specimen by using the weight fixture 14 to achieve quantitative loading. The design of the medium holding unit is that the liquid medium 21 is in the bottom container 15. The liquid medium 21 is pumped from the container 15 through the water pipe 8 to the upper funnel 6 by using the water pump 7. The liquid medium 21 flows back to the container 15 from between the specimen 11 and the counter grinding part 9, keeping the specimen always in the liquid medium 21.

[0024] Before the test, the specimen 11 passes through the counter grinding part 9 and the disc-shaped weight 10 is installed. The water pump 7 is started to fill the space between the specimen 11 and the counter grinding part 9 with the liquid medium 21. The first frequency converter 1 and the second frequency converter 2 are set with the frequencies of the circumferential motion and the longitudinal motion. Then the first motor 3 and the second motor 4 are started to drive the specimen 11 to perform circumferential and longitudinal motions simultaneously, realizing a circular wear scar.

[0025] The implementation results show that the present utility model adopts a newly designed test device for studying circular corrosion wear. The present utility model fills the blank of the research equipment for studying the circular corrosion wear of tubular or rod-shaped specimens, provides a new method for the research in the field of corrosion wear, and expands the research content and ideas of corrosion wear.

Claims

1. A test device for studying annular corrosion and wear, characterized in that: The device includes a circumferential drive unit, a longitudinal drive unit, a load unit, and a medium holding unit. The circumferential drive unit is provided with a first frequency converter, a first motor, and a toggle block. The longitudinal drive unit is provided with a second frequency converter, a second motor, a special-shaped lever, and a crankshaft. The load unit is provided with a sample, a disc-shaped weight, and a weight fixture. The medium holding unit is provided with a funnel, a water pump, a water pipe, a grinding piece, a container, and a liquid medium. The specific structure is as follows: The input end of the first motor is connected to the first frequency converter, and the output end of the first motor is connected to the toggle block. The toggle block is slidably matched with the upper end of the vertical sample through the center hole and frictionally transmitted. The lower end of the sample extends into the liquid medium in the container and corresponds to one end of the special-shaped lever. A water pump is provided in the liquid medium; the input end of the second motor is connected to the second frequency converter, and the output end of the second motor is connected to the crankshaft, which corresponds to the other end of the special-shaped lever; the funnel, the grinding piece, the grinding piece fixture, the disc-shaped weight and the weight fixture are sleeved on the sample from top to bottom, the funnel is an upper and lower opening structure, the upper end of the water pipe corresponds to the upper opening of the funnel, the lower end of the water pipe is connected to the water pump in the container, the lower end of the funnel is located at the upper end of the grinding piece, a gap is provided between the grinding piece and the sample, the lower opening of the funnel corresponds to the gap, the grinding piece fixture is clamped on the lower outer side of the grinding piece, and the disc-shaped weight is clamped to the sample through the weight fixture and is located below the grinding piece.

2. The test device for studying annular corrosion wear according to claim 1, characterized in that: The device also includes a bracket, which is provided with a grinding piece clamp, a base, a column, and a beam. A container and a column are arranged on the base, the column is located on one side of the container, one end of the beam is connected to the upper end of the column, and the other end of the beam is connected to the grinding piece clamp.

3. The test device for studying annular corrosion wear according to claim 1, characterized in that: The special-shaped lever is an integrated structure composed of a fulcrum, a left oblique rod, a right oblique rod, a left cross rod and a right cross rod. The two sides of the fulcrum are respectively connected to one end of the left oblique rod and the right oblique rod inclined downward, the other end of the left oblique rod is connected to the left cross rod, and the other end of the right oblique rod is connected to the right cross rod. The upper surface of the left cross rod corresponds to the lower end of the sample, and the upper surface of the right cross rod corresponds to the crankshaft. The fulcrum is located above the upper edge of the container.

4. The test device for studying annular corrosion wear according to claim 1, characterized in that: The specimen is in the form of a tube or a rod.

Images