Multi-parameter adjustable metal in-situ salt spray corrosion-fatigue device adaptive to optical measurement mechanics

Abstract

The utility model relates to the field of material testing devices, in particular to a multi-parameter adjustable metal in-situ salt spray corrosion-fatigue device adaptive to optical measurement mechanics, which comprises an in-situ salt spray corrosion fatigue reaction cavity, and the reaction cavity comprises a semi-closed salt spray bin, a sample, a mist exhaust fan, a sample adaptive block, a flow guide pipe and an exhaust pipe; an upper sample hole is formed in the middle of the top of the semi-closed salt mist bin, a lower sample hole is formed in the middle of the bottom surface of the semi-closed salt mist bin, the outer side wall of the sample adaptive block is tightly matched with the lower sample hole, an inner hole of the sample adaptive block is matched with a lower clamping end of a sample, and the upper sample hole is matched with an upper clamping end of the sample; and a flow guide pipe is arranged on the bottom surface of the semi-closed salt mist bin close to the exhaust pipe. The device can be adapted to samples with different sizes.

Description

Technical Field

[0001] The utility model relates to the field of material testing devices, in particular to a multi-parameter adjustable metal in-situ salt spray corrosion-fatigue device adapted to optical measurement mechanics. Background Art

[0002] In actual service, metals are often affected by the combined effects of load and environment. For example, a moving car is subject to the dual effects of the atmospheric environment and alternating loads. Therefore, it is necessary to develop a metal in-situ corrosion-fatigue test device with adjustable experimental parameters and adapt it to existing advanced measurement technologies, such as combining DIC-3D (digital image correlation technology) to measure the strain of the sample surface during the experiment. However, in the current designs disclosed at home and abroad, most of the experimental devices cannot adapt to fatigue experiments of different sizes. Therefore, it is urgent to design a corrosion device that can adapt to samples of different sizes and is easy to operate for metal fatigue mechanical properties testing. Utility Model Content

[0003] The utility model provides a multi-parameter adjustable metal in-situ salt spray corrosion-fatigue device adapted to optical measurement mechanics, which can be adapted to samples of different sizes.

[0004] The technical solution adopted by the utility model to solve the above problems is:

[0005] A multi-parameter adjustable metal in-situ salt spray corrosion fatigue device adapted to optical mechanics, comprising an in-situ salt spray corrosion fatigue reaction chamber, the reaction chamber comprising a semi-enclosed salt spray bin, a sample, a mist exhaust fan, a sample adapter block, a guide pipe and an exhaust pipe; a square salt spray air inlet is provided on the left side of the semi-enclosed salt spray bin for introducing salt spray, a circular salt spray exhaust hole is provided on the right side of the semi-enclosed salt spray bin, the right end of the circular salt spray exhaust hole is connected to the mist exhaust fan, and the other end of the mist exhaust fan is connected to the exhaust pipe, an upper sample hole is provided in the middle of the top of the semi-enclosed salt spray bin, a lower sample hole is provided in the middle of the bottom surface of the semi-enclosed salt spray bin, the outer side wall of the sample adapter block is tightly matched with the lower sample hole, the inner hole of the sample adapter block is matched with the lower clamping end of the sample, and the upper sample hole is matched with the upper clamping end of the sample; a guide pipe is provided on the bottom surface of the semi-enclosed salt spray bin near the exhaust pipe.

[0006] Furthermore, the semi-enclosed salt spray bin has no wall panel at the front end.

[0007] Furthermore, the temperature measuring probe setting hole is close to the upper sample hole and is located on the side of the air inlet.

[0008] Furthermore, the front end hole surface of the square salt mist air inlet is parallel to the sample and located in the same plane, and the sample and the center of the circular salt mist exhaust hole are also located in the same plane.

[0009] Furthermore, the connections between the inner hole and the sample, and between the temperature measuring probe and the temperature measuring probe setting hole are all sealed with viscous sealant.

[0010] Furthermore, the size of the upper sample hole matches the maximum size of the sample.

[0011] Furthermore, it also includes a pressure limiting valve, an air compressor, a liquid storage tank, a salt liquid valve, a salt spray nozzle, a salt spray conduit, a salt spray conduit bracket, a compressed gas conduit and a solution conduit. The salt spray conduit bracket supports the salt spray conduit and is located at the salt spray air inlet. The salt spray nozzle is fixedly connected in the salt spray conduit. The salt spray nozzle includes an air inlet end and a liquid inlet end. The pressure limiting valve is connected between the air inlet end and one end of the compressed gas conduit. The other end of the compressed gas conduit is connected to the air outlet of the air compressor. A salt liquid valve is connected between the liquid inlet end and the solution conduit. The other end of the solution conduit is connected to the liquid storage tank.

[0012] Furthermore, it also includes a constant temperature pot, a winding heating pipe and an insulation box. The liquid storage tank is placed in the constant temperature pot for heating, the winding heating pipe is placed in the insulation box, and the salt spray conduit runs through the insulation box.

[0013] Furthermore, it also includes a condensed water reflux pipe, and the salt spray conduit is provided with a condensed water reflux pipe.

[0014] Furthermore, it also includes a heating temperature control box, a temperature measuring probe and a temperature measuring probe setting hole; the top of the semi-enclosed salt spray warehouse is provided with a temperature measuring probe setting hole, and a temperature measuring probe is installed in the temperature measuring probe setting hole. The heating temperature control box collects the temperature signal of the temperature measuring probe and controls the temperature of the constant temperature pot and the wound heating tube at the same time.

[0015] Beneficial effects of the utility model:

[0016] 1. For samples of different sizes, only the sample adapter block needs to be replaced, which avoids the need to replace the semi-enclosed salt spray chamber due to the change of sample size. It supports experiments on samples of different sizes, simplifies the experiment and reduces costs.

[0017] 2. The semi-enclosed salt spray chamber has no wall at the front, so there is no obstruction in front of the sample, and no droplets will interfere with the measurement of DIC digital imaging equipment;

[0018] 3. Adjust the flow rate of salt mist through the pressure limiting valve, and adjust the concentration of salt mist through the salt liquid valve;

[0019] 4. The droplets of salt mist condensed on the inner wall of the conduit can be recycled through the condensed water return pipe to improve the utilization rate of the salt solution and prevent the solution from submerging the salt spray nozzle;

[0020] 5. The constant temperature pot heats the brine at the source, which first increases the temperature of the salt mist. The wrapped heating tube reheats the salt mist during its flow, which increases the heating power and has a significant heating effect on the salt mist, avoiding a significant drop in temperature during the flow of the salt mist in the conduit, allowing the salt mist to reach a higher temperature and improving the accuracy of the temperature control effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the multi-parameter adjustable metal in-situ salt spray corrosion-fatigue device of the utility model;

[0022] Figure 2 It is a schematic diagram of the flow field control principle of the corrosion chamber of the metal in-situ salt spray corrosion-fatigue device of the utility model;

[0023] Figure 3 The utility model is a schematic diagram of the overall structure of the in-situ salt spray corrosion device with adjustable parameters, the fatigue testing machine and the DIC digital imaging equipment.

[0024] Figure 4 This is a cross-sectional view of the sample adapter block of the present utility model.

[0025] In the figure:

[0026] Heating temperature control box 1; pressure limiting valve 2; air compressor 3; liquid storage tank 4; constant temperature pot 5; condensate collection box 6; semi-enclosed salt spray chamber 7; air inlet 7-1; front end hole surface 7-1-1; exhaust hole 7-2; sample 8; exhaust fan 9; industrial camera 10; digital image analysis equipment 11; light source 12; salt liquid valve 13; salt spray nozzle 14; condensate return pipe 15; winding heating pipe 16; sample adapter block 17; outer wall 17-1; inner hole 17-2; guide pipe 18; temperature probe 19; fatigue testing machine 20; salt spray duct 21; salt spray duct bracket 22; compressed gas duct 23; solution duct 24; temperature probe setting hole 25; upper sample hole 26; lower sample hole 27; exhaust pipe 28; insulation box 29. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Combine the following Figure 1-4 This embodiment is described:

[0029] A multi-parameter adjustable metal in-situ salt spray corrosion-fatigue device includes a temperature control module, a salt spray adjustment module, and an in-situ salt spray corrosion fatigue reaction chamber. The in-situ salt spray corrosion fatigue experiment of metal material level is studied through a corrosion environment experimental device matched with an Instron 8803 electro-hydraulic servo fatigue machine and a non-contact full-field strain measurement system DIC.

[0030] The in-situ salt spray corrosion fatigue reaction chamber includes: a semi-enclosed salt spray chamber 7, a sample 8, a mist exhaust fan 9, a sample adapter block 17, a guide pipe 18 and an exhaust pipe 28. The semi-enclosed salt spray chamber 7 has no wall plate at the front end, and the front of the sample 8 is a semi-open design. Its beneficial effect is that there is no obstruction in front of the sample, and no droplets will be generated to interfere with the measurement of the DIC digital imaging device. The size of the upper sample hole 26 matches the maximum size of the sample 8, the outer wall 17-1 of the sample adapter block 17 is tightly matched with the lower sample hole 27, the inner hole 17-2 of the sample adapter block 17 matches the lower clamping end of the sample 8, and the upper sample hole 26 matches the upper clamping end of the sample 8, and is sealed with a sealant. Its beneficial effect is that for samples of different sizes, only the sample adapter block needs to be replaced, avoiding the replacement of the semi-enclosed salt spray chamber 7 due to the change of the sample size, supporting experiments of samples of different sizes, simplifying the experiment and reducing the cost.

[0031] When installing the specimen:

[0032] First, select a matching specimen adapter block 17 according to the different sizes of the specimen 8, fix the specimen adapter block 17 in the lower specimen hole 27, and then pass the specimen 8 through the upper specimen hole 26 and the inner hole 17-2 of the specimen adapter block 17 in sequence, and finally fix the upper and lower clamping ends of the specimen 8 to the upper and lower clamps of the fatigue testing machine 20.

[0033] Combine the following Figure 1-4 This embodiment is described:

[0034] The temperature regulating module comprises a heating temperature control box 1, a constant temperature pot 5, a winding heating tube 16, a temperature measuring probe 19 and an insulation box 29. The heating temperature control box 1 collects the temperature signal of the temperature measuring probe 19 and controls the temperature of the constant temperature pot 5 and the winding heating tube 16 at the same time. The winding heating tube 16 is placed in the insulation box 29, and the temperature measuring probe 19 is fixed in the temperature measuring probe setting hole 25. Its beneficial effect is that the constant temperature pot 5 heats the salt water at the source, firstly raising the temperature of the salt mist, and the winding heating tube 16 performs secondary heating on the salt mist during the flow of the salt mist, thereby increasing the heating power, and having an obvious heating effect on the salt mist, thereby avoiding a substantial cooling caused by the flow of the salt mist in the conduit, so that the salt mist can reach a higher temperature, and the accuracy of the temperature control effect is improved.

[0035] The salt spray regulating module comprises a pressure limiting valve 2, an air compressor 3, a liquid storage tank 4, a salt liquid valve 13, a salt spray nozzle 14, a condensed water return pipe 15, a salt spray conduit 21, a salt spray conduit bracket 22, a compressed gas conduit 23 and a solution conduit 24. The salt spray regulating module is provided with a salt spray nozzle 14, a salt liquid valve 13 and a condensed water return pipe 15. The compressed gas conduit 23 first sprays out gas, and the pressure difference is utilized to allow the salt water in the liquid storage tank 4 to flow up through the solution conduit 24. The beneficial effect is that the droplets of salt spray condensed on the inner wall of the conduit can flow back to the condensed water collection tank 6 through the condensed water return pipe 15, thereby improving the utilization rate of the salt solution and preventing the solution from submerging the salt spray nozzle 14. The liquid storage tank 4 is placed in a constant temperature pot 5 for heating, and a solution conduit 24 is connected thereto, the salt spray nozzle 14 includes an air inlet end and a liquid inlet end, a pressure limiting valve 2 is connected between the air inlet end and one end of the compressed gas conduit 23, a salt liquid valve 13 is connected between the liquid inlet end and the solution conduit 24, the salt spray nozzle 14 is fixedly connected in the salt spray conduit 21, and the other end of the compressed gas conduit 23 is connected to the air outlet of the heating temperature control box 1. Its beneficial effect is that the flow rate of the salt spray can be adjusted by the pressure limiting valve 2, and the concentration of the salt spray can be adjusted by the salt liquid valve.

[0036] Of course, the above description is not a limitation of the instructions for use, and the utility model is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the utility model also fall within the protection scope of the utility model.

Claims

1. A multi-parameter adjustable metal in-situ salt spray corrosion-fatigue device adapted to photomechanics, comprising an in-situ salt spray corrosion fatigue reaction chamber, characterized in that: The reaction chamber comprises a semi-enclosed salt spray chamber (7), a sample (8), a mist exhaust fan (9), a sample adapter block (17), a flow guide pipe (18) and an exhaust pipe (28); a square salt spray air inlet (7-1) is provided on the left side of the semi-enclosed salt spray chamber (7) for introducing salt spray, a circular salt spray exhaust hole (7-2) is provided on the right side of the semi-enclosed salt spray chamber (7), the right end of the circular salt spray exhaust hole (7-2) is connected to the mist exhaust fan (9), and the other end of the mist exhaust fan (9) is connected to the exhaust pipe (28); An upper sample hole (26) is provided in the middle of the top of the fog bin (7), a lower sample hole (27) is provided in the middle of the bottom surface of the semi-enclosed salt fog bin (7), the outer wall (17-1) of the sample adapter block (17) is tightly matched with the lower sample hole (27), the inner hole (17-2) of the sample adapter block (17) is matched with the lower clamping end of the sample (8), and the upper sample hole (26) is matched with the upper clamping end of the sample (8); a guide pipe (18) is provided on the bottom surface of the semi-enclosed salt fog bin (7) near the exhaust pipe (28).

2. The metal in-situ salt spray corrosion-fatigue device according to claim 1, characterized in that: The semi-enclosed salt spray bin (7) has no wall plate at the front end.

3. The metal in-situ salt spray corrosion-fatigue device according to claim 1, characterized in that: The front end hole surface (7-1-1) of the square salt mist air inlet (7-1) is parallel to the sample (8) and is located in the same plane. The sample (8) and the center of the circular salt mist exhaust hole (7-2) are also located in the same plane.

4. The metal in-situ salt spray corrosion-fatigue device according to claim 1, characterized in that: The connections between the inner hole (17-2) and the sample (8), and between the temperature measuring probe (19) and the temperature measuring probe setting hole (25) are all sealed with a viscous sealant.

5. The metal in-situ salt spray corrosion-fatigue device according to claim 1, characterized in that: The size of the upper sample hole (26) matches the maximum size of the sample (8).

6. The metal in-situ salt spray corrosion-fatigue device according to claim 1, characterized in that: The invention also comprises a pressure limiting valve (2), an air compressor (3), a liquid storage tank (4), a salt liquid valve (13), a salt spray nozzle (14), a salt spray conduit (21), a salt spray conduit bracket (22), a compressed gas conduit (23) and a solution conduit (24); the salt spray conduit bracket (22) supports the salt spray conduit (21) and is located at the salt spray air inlet (7-1); the salt spray nozzle (14) is fixedly connected in the salt spray conduit (21); the salt spray nozzle (14) comprises an air inlet end and a liquid inlet end; the pressure limiting valve (2) is connected between the air inlet end and one end of the compressed gas conduit (23); the other end of the compressed gas conduit (23) is connected to the air outlet of the air compressor (3); the salt liquid valve (13) is connected between the liquid inlet end and the solution conduit (24); and the other end of the solution conduit (24) is connected to the liquid storage tank (4).

7. The metal in-situ salt spray corrosion-fatigue device according to claim 6, characterized in that: It also comprises a constant temperature pot (5), a winding heating pipe (16) and a heat preservation box (29); the liquid storage tank (4) is placed in the constant temperature pot (5) for heating, the winding heating pipe (16) is placed in the heat preservation box (29), and the salt spray conduit (21) runs through the heat preservation box (29).

8. The metal in-situ salt spray corrosion-fatigue device according to claim 7, characterized in that: It also comprises a condensed water return pipe (15), and the condensed water return pipe (15) is provided on the salt mist conduit (21).

9. The metal in-situ salt spray corrosion-fatigue device according to claim 8, characterized in that: The invention also comprises a heating temperature control box (1), a temperature measuring probe (19) and a temperature measuring probe setting hole (25); the top of the semi-enclosed salt spray chamber (7) is provided with a temperature measuring probe setting hole (25), a temperature measuring probe (19) is installed in the temperature measuring probe setting hole (25), and the heating temperature control box (1) collects the temperature signal of the temperature measuring probe (19) and controls the temperature of the constant temperature pot (5) and the winding heating tube (16) at the same time.

10. The metal in-situ salt spray corrosion-fatigue device according to claim 9, characterized in that: The temperature measuring probe setting hole (25) is close to the upper sample hole (26) and is located on one side of the air inlet (7-1).

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