A pressure environment salt spray test device for alloy castings

Abstract

The invention discloses a salt spray test device for alloy castings under pressure environment, and relates to the technical field of testing equipment. The salt spray test device for alloy castings under pressure environment comprises a main box, a control panel, a small cover plate, an experimental hatch cover, a salt liquid tank and a salt spray chamber, wherein the control panel, the small cover plate and the experimental hatch cover are mounted on the top of the main box, the salt liquid tank and the salt spray chamber are mounted inside the top of the main box, the small cover plate seals the salt liquid tank, the experimental hatch cover seals the salt spray chamber, an atomizer is arranged in the salt spray chamber, a sealing mechanism is further arranged between the experimental hatch cover and the salt spray chamber, a vibration mechanism is installed at the bottom of the salt liquid tank, a liquid inlet pipe is connected between the salt liquid tank and the atomizer, an elastic steel sheet is arranged at the bottom of the salt liquid tank, when a tensile stress spring generates vibration, the elastic steel sheet is driven to generate vibration through a ball pair connector, a sodium chloride solution in the salt liquid tank is disturbed, and concentration stratification of the sodium chloride solution is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of testing equipment, in particular to a pressure environment salt spray testing device for alloy castings. Background Art

[0002] The salt spray test machine is a device commonly used to test the corrosion resistance of materials. It simulates the conditions of salt spray, salt spray solution, moisture and pressure in the marine climate environment to test the corrosion of materials after long-term exposure to such an environment. By conducting accelerated corrosion tests on materials in a salt spray environment, it can help evaluate their corrosion resistance and improve the corrosion resistance of materials or evaluate their service life based on the test results.

[0003] Since salt spray and organic matter are corrosive due to long-term contact, the salt spray chamber of the existing salt spray test cannot be sealed with rubber, but is generally sealed with a water tank. The water tank seal has a simple structure, is easy to use, and has a good anti-leakage effect. The only drawback is that it cannot maintain a certain pressure. If the pressure inside the salt spray chamber increases, it will overflow through the water tank. Secondly, since the salt spray test takes a long time, the sodium chloride solution in the salt solution tank will have concentration stratification after a long period of standing, resulting in uneven salt concentration in the salt spray, affecting the test effect. Summary of the invention

[0004] The purpose of the present invention is to provide a pressure environment salt spray testing device for alloy castings to solve the problems raised in the prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a salt spray testing device for alloy castings in a pressure environment, comprising a main box, a control panel, a small cover, an experimental hatch cover, a salt liquid tank and a salt spray chamber, wherein the control panel, the small cover and the experimental hatch cover are installed on the top of the main box, the salt liquid tank and the salt spray chamber are installed inside the top of the main box, the small cover seals the salt liquid tank, the experimental hatch cover seals the salt spray chamber, an atomizer is arranged in the salt spray chamber, a sealing mechanism is further arranged between the experimental hatch cover and the salt spray chamber, a vibration mechanism is installed at the bottom of the salt liquid tank, and a liquid inlet pipe is connected between the salt liquid tank and the atomizer.

[0006] Furthermore, a booster is installed at the rear side of the main box, and the booster is connected to the interior of the salt spray chamber through a pressure pipe. A first motor is installed at the bottom of the salt spray chamber, and a specimen tray and a pressure sensor are arranged inside the salt spray chamber. The specimen tray is made of a metal grid. The first motor passes through the salt spray chamber and is coaxially connected to the specimen tray. A sampling funnel is arranged inside the salt spray chamber, and the sampling funnel passes through the bottom of the salt spray chamber. Before using the salt spray test equipment to test the alloy casting, the operator needs to complete a series of preparations. First, close the valves on the drain pipe and the sampling pipe, add an appropriate amount of clean water to the salt spray chamber and the water groove, and add the configured chlorine to the salt liquid tank. Sodium chloride solution is added, and the alloy casting to be tested is placed on the specimen tray. Then the small cover and the experimental hatch are closed, and finally the salt spray test device is started through the control panel. The interior of the salt spray chamber is sealed and pressurized. The booster pressurizes the interior of the salt spray chamber through the pressure pipe. The pressure sensor detects the pressure inside the salt spray chamber so that the pressure inside the salt spray chamber reaches the test standard. The atomizer atomizes and releases the sodium chloride solution in the salt liquid tank. The first motor is energized to drive the specimen tray to rotate slowly, that is, the alloy casting on the specimen tray is also rotating slowly. The disturbance of the interior of the salt spray chamber when the specimen tray rotates causes the salt spray to diffuse and distribute more evenly, which can play a certain role on each surface of the tested alloy casting.

[0007] Furthermore, a sampling tube is connected to the bottom of the sampling funnel, and a drain pipe is connected to the bottom of the salt spray chamber. The end of the sampling tube away from the sampling funnel passes through the front side of the main box, and the side of the drain pipe away from the salt spray chamber passes through the rear side of the main box. Valves are provided on the drain pipe and the side of the sampling tube extending out of the main box. The atomized sodium chloride solution gradually condenses back into liquid droplets after contacting the inner wall of the salt spray chamber, and a small amount of solution will also accumulate in the sampling funnel. During the experiment, the operator can slowly open the valve on the sampling tube, and the condensed droplets in the sampling tube quickly flow out under the pressure inside the salt spray chamber. The solution in the sampling tube is collected with a measuring cup to facilitate the analysis of the salt spray.

[0008] Furthermore, a water groove is provided on the outer contour of the salt spray chamber, a sealing ring is provided on the side of the experimental hatch close to the salt spray chamber, the sealing ring is embedded in the water groove, the sealing mechanism includes a casing, a worm, a swivel, a worm gear groove block and a plurality of sealing blocks, the casing is arranged on the top of the main box, the swivel is rotatably installed in the casing, and a plurality of the sealing blocks are slidably installed between the casing and the swivel.

[0009] Furthermore, several sealing blocks are evenly distributed in a ring shape, the top of each sealing block is slidably connected to the inner wall of the cladding, the bottom of each sealing block is in close contact with the swivel, each sealing block is provided with a sliding pin, and the swivel is evenly provided with inclined sliding grooves with the same number as the sealing blocks, each of the sliding pins is slidably installed in the inclined sliding grooves, all the sealing blocks enclose a complete circular ring and are in sealing contact with the sealing ring, and after the experimental hatch is closed, the sealing ring enters the water groove, and the clean water added to the water groove plays a role in isolating the inside and outside of the salt spray chamber. Since the interior of the salt spray chamber needs to be pressurized, in order to prevent the clean water in the water groove from overflowing from one end outside the sealing ring, it is necessary to seal and block the outer edge of the water groove and the outer ring of the sealing ring.

[0010] Furthermore, the worm wheel slot block is connected to the bottom of the rotating ring, a second motor is installed at the bottom of the enclosure, the worm is installed on the motor shaft of the second motor, the worm and the worm wheel slot block are meshed for transmission, the control system drives the worm to rotate by controlling the second motor, and the worm drives the rotating ring to rotate in the enclosure through the worm wheel slot block. Since all the sealing blocks are slidingly arranged with the enclosure, the sealing blocks are restricted to move in the radial direction, and the sliding pin is pushed to move through the inclined slide groove during the rotation of the rotating ring, and the sliding pin drives the sealing blocks to move. After all the sealing blocks are enclosed, the outer side of the water groove and the outer ring of the sealing ring are sealed, the air pressure inside the salt spray chamber increases, the clean water in the water groove flows to the outer ring of the sealing ring, the water level of the inner ring of the sealing ring decreases, and the water level of the outer ring of the sealing ring increases. The rising water level reduces the cavity on one side of the sealing mechanism, and the air pressure gradually increases, preventing the clean water in the water groove from overflowing, thereby meeting the requirements of the salt spray chamber pressurization test.

[0011] Furthermore, an elastic steel sheet is integrally provided at the bottom of the salt liquid tank, and the vibration mechanism includes a third motor and a paddle wheel. The third motor is invertedly installed in the main box through a bracket, and the paddle wheel is installed on the motor shaft of the third motor. A number of arc-shaped steel sheets made of spring steel are evenly distributed in a ring shape on the paddle wheel. Since the salt spray test takes a long time, the sodium chloride solution in the salt liquid tank will have concentration stratification after standing for a long time, resulting in uneven salt concentration of the salt spray. The third motor is driven to work through the control system, and the third motor drives the paddle wheel to rotate slowly. The arc-shaped steel sheet on the paddle wheel gradually squeezes the tensile stress spring. After the arc-shaped steel sheet passes the tensile stress spring, the tensile stress spring vibrates.

[0012] Furthermore, the vibration mechanism also includes a tensile stress spring and a ball-pair connector, the ball-pair connector is connected to the bottom of the elastic steel sheet through a ball-pair, the tensile stress spring is connected between the ball-pair connector and the inner wall of the main chassis, and the paddle wheel paddles the tensile stress spring. Since the elastic steel sheet has elastic strain capacity, when the tensile stress spring vibrates, it drives the elastic steel sheet to vibrate through the ball-pair connector, further disturbing the sodium chloride solution in the salt solution tank, avoiding concentration stratification of the sodium chloride solution, and improving the output stability of the salt spray properties.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The specimen tray is driven to rotate slowly by energizing the first motor, and the alloy casting on the specimen tray is also rotating slowly. The disturbance inside the salt spray chamber caused by the rotation of the specimen tray makes the salt spray diffuse and distribute more evenly, which can play a certain role on each surface of the tested alloy casting.

[0015] 2. Through the setting of the sealing mechanism, all the sealing blocks are enclosed to seal the outside of the water groove and the outer ring of the sealing ring. The air pressure inside the salt spray chamber increases, the water level of the inner ring of the sealing ring decreases, and the water level of the outer ring of the sealing ring increases. The rising water level makes the cavity on one side of the sealing mechanism smaller, and the air pressure gradually increases, preventing the clean water in the water groove from overflowing, which can meet the needs of the salt spray chamber pressurization test.

[0016] 3. By setting an elastic steel sheet at the bottom of the salt liquid tank, the elastic steel sheet has elastic strain capacity. When the tensile stress spring vibrates, the elastic steel sheet is driven to vibrate through the ball joint connector, further disturbing the sodium chloride solution in the salt liquid tank, avoiding the concentration stratification of the sodium chloride solution, and improving the output stability of the salt spray properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The overall appearance structure of the present invention is shown in FIG. Figure 1 ;

[0018] Figure 2 The overall appearance structure of the present invention is shown in FIG. Figure 2 ;

[0019] Figure 3 The internal structure of the present invention is shown in FIG. Figure 1 ;

[0020] Figure 4 The internal structure of the present invention is shown in FIG. Figure 2 ;

[0021] Figure 5 The internal structure of the present invention is shown in FIG. Figure 3 ;

[0022] Figure 6Schematic diagram of the partial decomposition structure of the present invention Figure 1 ;

[0023] Figure 7 Schematic diagram of the partial decomposition structure of the present invention Figure 2 ;

[0024] Figure 8 It is a structural schematic diagram of the sealing mechanism of the present invention.

[0025] In the figure: 1. main case; 2. control panel; 3. small cover; 4. experimental cabin cover; 5. salt solution tank; 6. salt spray cabin; 7. specimen tray; 8. first motor; 9. atomizer; 10. sampling funnel; 11. liquid inlet pipe; 12. liquid discharge pipe; 13. sampling tube; 14. pressurizing pipe; 15. supercharger; 16. sealing ring; 17. water groove; 18. cladding; 19. second motor; 20. worm; 21. swivel; 22. worm wheel groove block; 23. sealing block; 24. sliding pin; 25. third motor; 26. paddle wheel; 27. tension spring; 28. ball joint connector; 29. ​​elastic steel sheet. DETAILED DESCRIPTION

[0026] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0027] Example: Figure 1-Figure 8 As shown, the present invention provides a technical solution, a salt spray test device for alloy castings in a pressure environment, comprising a main box 1, a control panel 2, a small cover plate 3, an experimental cabin cover 4, a salt liquid tank 5 and a salt spray cabin 6, the control panel 2, the small cover plate 3 and the experimental cabin cover 4 are installed on the top of the main box 1, the salt liquid tank 5 and the salt spray cabin 6 are installed inside the top of the main box 1, the small cover plate 3 seals the salt liquid tank 5, the experimental cabin cover 4 seals the salt spray cabin 6, an atomizer 9 is arranged in the salt spray cabin 6, a sealing mechanism is also arranged between the experimental cabin cover 4 and the salt spray cabin 6, a vibration mechanism is installed at the bottom of the salt liquid tank 5, and a liquid inlet pipe 11 is connected between the salt liquid tank 5 and the atomizer 9.

[0028] A booster 15 is installed on the rear side of the main chassis 1, and the booster 15 is connected to the inside of the salt spray chamber 6 through a pressurizing pipe 14. A first motor 8 is installed at the bottom of the salt spray chamber 6. A specimen tray 7 and a pressure sensor are arranged inside the salt spray chamber 6. The specimen tray 7 is made of a metal grid. The first motor 8 passes through the salt spray chamber 6 and is coaxially connected to the specimen tray 7. A sampling funnel 10 is arranged inside the salt spray chamber 6, and the sampling funnel 10 passes through the bottom of the salt spray chamber 6. Before using the salt spray test equipment to test the alloy casting, the operator needs to complete a series of preparations. First, close the valves on the drain pipe 12 and the sampling pipe 13, add an appropriate amount of clean water to the salt spray chamber 6 and the water groove 17, and add the configured sodium chloride solution to the salt liquid tank 5. , place the alloy casting to be tested on the specimen tray 7, then close the small cover 3 and the experimental hatch 4, and finally start the salt spray test device through the control panel 2, seal and pressurize the interior of the salt spray cabin 6, and the booster 15 pressurizes the interior of the salt spray cabin 6 through the pressurizing pipe 14. The pressure sensor detects the pressure inside the salt spray cabin 6 so that the pressure inside the salt spray cabin 6 reaches the test standard. The atomizer 9 atomizes and releases the sodium chloride solution in the salt liquid tank 5, and the first motor 8 is energized to drive the specimen tray 7 to rotate slowly, that is, the alloy casting on the specimen tray 7 is also rotating slowly. When the specimen tray 7 rotates, the disturbance inside the salt spray cabin 6 causes the salt spray to diffuse and distribute more evenly, which can play a certain role on each surface of the tested alloy casting.

[0029] A sampling tube 13 is connected to the bottom of the sampling funnel 10, and a drain pipe 12 is connected to the bottom of the salt spray chamber 6. The end of the sampling tube 13 away from the sampling funnel 10 passes through the front side of the main box 1, and the side of the drain pipe 12 away from the salt spray chamber 6 passes through the rear side of the main box 1. Valves are provided on the drain pipe 12 and the side of the sampling tube 13 extending out of the main box 1. The atomized sodium chloride solution gradually condenses back into liquid droplets after contacting the inner wall of the salt spray chamber 6, and a small amount of solution will also accumulate in the sampling funnel 10. During the experiment, the operator can slowly open the valve on the sampling tube 13, and the condensed droplets in the sampling tube 13 flow out quickly under the pressure inside the salt spray chamber 6. The solution in the sampling tube 13 is collected by a measuring cup to facilitate the analysis of the salt spray.

[0030] A water groove 17 is provided on the outer contour of the salt spray chamber 6, and a sealing ring 16 is provided on the side of the experimental hatch 4 close to the salt spray chamber 6. The sealing ring 16 is embedded in the water groove 17. The sealing mechanism includes a casing 18, a worm 20, a swivel 21, a worm wheel groove block 22 and a plurality of sealing blocks 23. The casing 18 is arranged on the top of the main box 1, and the swivel 21 is rotatably installed in the casing 18. A plurality of sealing blocks 23 are slidably installed between the casing 18 and the swivel 21. The six sealing blocks 23 are evenly distributed in an annular shape, and the top of each sealing block 23 slides with the inner wall of the casing 18. The bottom of each sealing block 23 is in close contact with the rotating ring 21, and each sealing block 23 is provided with a sliding pin 24. The rotating ring 21 is evenly provided with inclined sliding grooves having the same number as the sealing blocks 23. Each sliding pin 24 is slidably installed in the inclined sliding groove. All the sealing blocks 23 form a complete circular ring and are in sealing contact with the sealing ring 16. The worm gear groove block 22 is connected to the bottom of the rotating ring 21, and the second motor 19 is installed at the bottom of the housing 18. The worm 20 is installed on the motor shaft of the second motor 19, and the worm 20 is meshed with the worm gear groove block 22 for transmission.

[0031] After the experimental hatch cover 4 is closed, the sealing ring 16 enters the water groove 17. The clean water added to the water groove 17 plays a role in isolating the inner and outer sides of the salt spray chamber 6. Since the interior of the salt spray chamber 6 needs to be pressurized, in order to prevent the clean water in the water groove 17 from overflowing from one end outside the sealing ring 16, it is necessary to seal and block the outer edge of the water groove 17 and the outer ring of the sealing ring 16. The control system drives the worm 20 to rotate by controlling the second motor 19. The worm 20 drives the rotating ring 21 to rotate in the cladding 18 through the worm gear groove block 22. Since all the sealing blocks 23 are set to slide with the cladding 18, the sealing blocks 23 are restricted. Moving along the radial direction, the sliding pin 24 is pushed to move by the inclined sliding groove during the rotation of the rotating ring 21, and the sliding pin 24 drives the sealing block 23 to move. After all the sealing blocks 23 are enclosed, the outer side of the water groove 17 and the outer ring of the sealing ring 16 are sealed, and the air pressure inside the salt spray chamber 6 increases, and the clean water in the water groove 17 flows to the outer ring of the sealing ring 16, the water level of the inner ring of the sealing ring 16 decreases, and the water level of the outer ring of the sealing ring 16 increases. The rising water level reduces the cavity on one side of the sealing mechanism, and the air pressure gradually increases, preventing the clean water in the water groove 17 from overflowing, thereby meeting the pressure test requirements of the salt spray chamber 6.

[0032] An elastic steel sheet 29 is integrally provided at the bottom of the salt solution tank 5, and the vibration mechanism includes a third motor 25 and a paddle wheel 26. The third motor 25 is invertedly installed in the main chassis 1 through a bracket, and the paddle wheel 26 is installed on the motor shaft of the third motor 25. A plurality of arc-shaped steel sheets made of spring steel are evenly distributed in a ring shape on the paddle wheel 26. The vibration mechanism also includes a tensile stress spring 27 and a ball-pair connector 28. The ball-pair connector 28 is connected to the bottom of the elastic steel sheet 29 through a ball-pair. The tensile stress spring 27 is connected between the ball-pair connector 28 and the inner wall of the main chassis 1, and the paddle wheel 26 paddles the tensile stress spring 27.

[0033] Since the salt spray test takes a long time, the sodium chloride solution in the salt liquid tank 5 will have concentration stratification after standing for a long time, resulting in uneven salt concentration of the salt spray. The third motor 25 is driven to work through the control system, and the third motor 25 drives the paddle wheel 26 to rotate slowly. The arc-shaped steel sheet on the paddle wheel 26 gradually squeezes the tensile stress spring 27. After the arc-shaped steel sheet passes the tensile stress spring 27, the tensile stress spring 27 vibrates. Since the elastic steel sheet 29 has elastic strain capacity, when the tensile stress spring 27 vibrates, the elastic steel sheet 29 is driven to vibrate through the ball pair connector 28, further disturbing the sodium chloride solution in the salt liquid tank 5, avoiding the concentration stratification of the sodium chloride solution, and improving the output stability of the salt spray properties.

[0034] Working principle of the present invention: Before using the salt spray test equipment to test the alloy casting, the operator needs to complete a series of preparations. First, close the valves on the drain pipe 12 and the sampling pipe 13, add an appropriate amount of clean water to the salt spray chamber 6 and the water groove 17, add the prepared sodium chloride solution to the salt liquid tank 5, place the alloy casting to be tested on the specimen tray 7, then close the small cover plate 3 and the experimental hatch cover 4, and finally start the salt spray test device through the control panel 2 to seal the inside of the salt spray chamber 6 and increase the pressure. The booster 15 increases the pressure inside the salt spray chamber 6 through the pressure pipe 14. The pressure sensor detects the pressure inside the salt spray chamber 6, so that the pressure inside the salt spray chamber 6 reaches the test standard. The atomizer 9 atomizes and releases the sodium chloride solution in the salt solution tank 5. The first motor 8 is energized to drive the specimen tray 7 to rotate slowly, that is, the alloy casting on the specimen tray 7 also rotates slowly. The disturbance inside the salt spray chamber 6 caused by the rotation of the specimen tray 7 causes the salt spray to diffuse and distribute more evenly, which can play a certain role on each surface of the tested alloy casting.

[0035] The atomized sodium chloride solution gradually condenses back into liquid droplets after contacting the inner wall of the salt spray chamber 6, and a small amount of solution will also accumulate in the sampling funnel 10. During the experiment, the operator can slowly open the valve on the sampling tube 13, and the condensed droplets in the sampling tube 13 will quickly flow out under the pressure inside the salt spray chamber 6. The solution in the sampling tube 13 is collected with a measuring cup to facilitate the analysis of the salt spray.

[0036] After the experimental hatch cover 4 is closed, the sealing ring 16 enters the water groove 17. The clean water added to the water groove 17 plays a role in isolating the inner and outer sides of the salt spray chamber 6. Since the interior of the salt spray chamber 6 needs to be pressurized, in order to prevent the clean water in the water groove 17 from overflowing from one end outside the sealing ring 16, it is necessary to seal and block the outer edge of the water groove 17 and the outer ring of the sealing ring 16. The control system drives the worm 20 to rotate by controlling the second motor 19. The worm 20 drives the rotating ring 21 to rotate in the cladding 18 through the worm gear groove block 22. Since all the sealing blocks 23 are set to slide with the cladding 18, the sealing blocks 23 are restricted. Moving along the radial direction, the sliding pin 24 is pushed to move by the inclined sliding groove during the rotation of the rotating ring 21, and the sliding pin 24 drives the sealing block 23 to move. After all the sealing blocks 23 are enclosed, the outer side of the water groove 17 and the outer ring of the sealing ring 16 are sealed, and the air pressure inside the salt spray chamber 6 increases, and the clean water in the water groove 17 flows to the outer ring of the sealing ring 16, the water level of the inner ring of the sealing ring 16 decreases, and the water level of the outer ring of the sealing ring 16 increases. The rising water level reduces the cavity on one side of the sealing mechanism, and the air pressure gradually increases, preventing the clean water in the water groove 17 from overflowing, thereby meeting the pressure test requirements of the salt spray chamber 6.

[0037] Since the salt spray test takes a long time, the sodium chloride solution in the salt liquid tank 5 will have concentration stratification after standing for a long time, resulting in uneven salt concentration of the salt spray. The third motor 25 is driven to work through the control system, and the third motor 25 drives the paddle wheel 26 to rotate slowly. The arc-shaped steel sheet on the paddle wheel 26 gradually squeezes the tensile stress spring 27. After the arc-shaped steel sheet passes the tensile stress spring 27, the tensile stress spring 27 vibrates. Since the elastic steel sheet 29 has elastic strain capacity, when the tensile stress spring 27 vibrates, the elastic steel sheet 29 is driven to vibrate through the ball pair connector 28, further disturbing the sodium chloride solution in the salt liquid tank 5, avoiding the concentration stratification of the sodium chloride solution, and improving the output stability of the salt spray properties.

[0038] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A pressure environment salt spray test device for alloy castings, characterized by: The invention comprises a main box (1), a control panel (2), a small cover plate (3), an experimental cabin cover (4), a salt liquid tank (5) and a salt spray cabin (6), wherein the control panel (2), the small cover plate (3) and the experimental cabin cover (4) are mounted on the top of the main box (1), the salt liquid tank (5) and the salt spray cabin (6) are mounted inside the top of the main box (1), the small cover plate (3) seals the salt liquid tank (5), the experimental cabin cover (4) seals the salt spray cabin (6), an atomizer (9) is arranged in the salt spray cabin (6), a sealing mechanism is further arranged between the experimental cabin cover (4) and the salt spray cabin (6), a vibration mechanism is installed at the bottom of the salt liquid tank (5), and a liquid inlet pipe (11) is connected between the salt liquid tank (5) and the atomizer (9); A booster (15) is installed at the rear side of the main box (1), and the booster (15) is connected to the interior of the salt spray chamber (6) through a pressurizing pipe (14). A first motor (8) is installed at the bottom of the salt spray chamber (6). A specimen tray (7) and a pressure sensor are arranged inside the salt spray chamber (6), and the specimen tray (7) is made of a metal grid. The first motor (8) passes through the salt spray chamber (6) and is coaxially connected to the specimen tray (7). A sampling funnel (10) is arranged inside the salt spray chamber (6), and the sampling funnel (10) passes through the bottom of the salt spray chamber (6); The bottom of the sampling funnel (10) is connected to a sampling tube (13), and the bottom of the salt spray chamber (6) is connected to a drainage tube (12); an end of the sampling tube (13) away from the sampling funnel (10) penetrates from the front side of the main box (1), and a side of the drainage tube (12) away from the salt spray chamber (6) penetrates from the rear side of the main box (1); and valves are provided on the sides of the drainage tube (12) and the sampling tube (13) extending out of the main box (1); The outer contour of the salt spray chamber (6) is provided with a water groove (17); a sealing ring (16) is provided on a side of the experimental hatch cover (4) close to the salt spray chamber (6); the sealing ring (16) is embedded in the water groove (17); the sealing mechanism comprises a casing (18), a worm (20), a rotating ring (21), a worm wheel groove block (22), and a plurality of sealing blocks (23); the casing (18) is provided on the top of the main box (1); the rotating ring (21) is rotatably mounted in the casing (18); and the plurality of sealing blocks (23) are slidably mounted between the casing (18) and the rotating ring (21); A plurality of sealing blocks (23) are evenly distributed in a ring shape, the top of each sealing block (23) is slidably connected to the inner wall of the cladding (18), the bottom of each sealing block (23) is in close contact with the rotating ring (21), each sealing block (23) is provided with a sliding pin (24), the rotating ring (21) is evenly distributed with inclined sliding grooves having the same number as the sealing blocks (23), each of the sliding pins (24) is slidably installed in the inclined sliding groove, and all the sealing blocks (23) enclose a complete ring and are in sealing contact with the sealing ring (16).

2. The pressure environment salt spray testing device for alloy castings according to claim 1, characterized in that: The worm wheel slot block (22) is connected to the bottom of the rotating ring (21), a second motor (19) is installed at the bottom of the housing (18), the worm (20) is installed on the motor shaft of the second motor (19), and the worm (20) is meshed with the worm wheel slot block (22) for transmission.

3. The pressure environment salt spray testing device for alloy castings according to claim 1, characterized in that: The bottom of the salt solution tank (5) is integrally provided with an elastic steel sheet (29), the vibration mechanism comprises a third motor (25) and a paddle wheel (26), the third motor (25) is invertedly mounted in the main box (1) via a bracket, the paddle wheel (26) is mounted on the motor shaft of the third motor (25), and a plurality of arc-shaped steel sheets made of spring steel are evenly distributed in a ring shape on the paddle wheel (26).

4. The pressure environment salt spray testing device for alloy castings according to claim 3, characterized in that: The vibration mechanism further comprises a tensile stress spring (27) and a ball-joint connecting member (28), wherein the ball-joint connecting member (28) is connected to the bottom of the elastic steel sheet (29) via a ball-joint, the tensile stress spring (27) is connected between the ball-joint connecting member (28) and the inner wall of the main housing (1), and the paddle wheel (26) paddles the tensile stress spring (27).

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