A salt spray testing machine

Abstract

The present invention discloses a salt spray tester, belonging to the technical field of salt spray testing equipment. The salt spray tester comprises a main box body, a box cover provided on the main box body, an observation cover provided on the box cover, a sealed water tank provided on the main box body, a box cover handle installed on the box cover, a sliding groove provided on a side wall of the box cover near the sealed water tank, a water guide plate provided in the sliding groove, a plurality of first springs provided in the sliding groove, one end of each first spring provided on the water guide plate, and the other end of each first spring provided on the inner wall of the sliding groove; a first inclined surface provided on one side of the water guide plate, a second inclined surface provided on one side of the water guide plate, a third inclined surface provided on a side of the box cover near the water guide plate, the first inclined surface being capable of cooperating with the third inclined surface, a fourth inclined surface provided on a side of the box cover near the water guide plate, the second inclined surface being capable of cooperating with the fourth inclined surface, and a wiper mechanism provided on the main box body for wiping the water guide plate. The present invention can reduce the possibility of water droplets on the box cover falling into the salt spray collector.

Description

Technical Field

[0001] The invention relates to the technical field of salt spray testing equipment, in particular to a salt spray testing machine. Background Art

[0002] A salt spray test chamber continuously sprays salt mist onto a sample, shortening its corrosion cycle to test its reliability. Salt spray refers to a diffuse system composed of tiny salt droplets in the atmosphere. It is one of the three types of artificial environmental protection systems. Many companies need to simulate the destructive effects of marine climates on their products, which is why salt spray test chambers are used. Salt spray test chambers are divided into two types: neutral salt spray and acidic salt spray, differing in the standards they meet and the test methods used.

[0003] The prior art can refer to the Chinese patent with authorization announcement number CN102156092B, which discloses a multifunctional salt spray test chamber, including a main box body with a sealed water tank, a box cover, an observation cover, a brine tank and a control device panel; the interior of the main box body includes a salt spray collector, an ultrasonic salt spray generating device and a conduit, a heating and temperature warning device, a temperature sensor, a humidity sensor, a support block, a partition, a sealing partition and a sample table assembly frame; the external accessories of the test chamber include a box cover handle, a brine tank cover, a salt spray metering device, a waste liquid drain pipe, a pipe and a hinged component.

[0004] However, when the operator needs to open the box cover, the water in the sealed water tank will remain on the box cover. When the operator opens the box cover, the water on the box cover will drip into the salt spray collector, thereby affecting the test results. Summary of the Invention

[0005] The present application provides a salt spray tester, which can reduce the possibility of water droplets on a box cover falling into a salt spray collector.

[0006] This application provides a salt spray test machine, which adopts the following technical solutions:

[0007] The cam is secured to the bottom of the water tank and has an angular channel formed between the end of the cam and the bottom of the water tank, wherein the cam is secured to the bottom of the water tank with respect to the cam.

[0008] By adopting the above technical solution, when the operator needs to open the box cover, the operator first drives the box cover to rotate through the box cover handle. At this time, the box cover is separated from the inner wall of the sealed water tank, and the water guide plate moves downward relative to the box cover under the elastic force of the first spring. When the first inclined surface is flush with the fourth inclined surface, and the second inclined surface is flush with the third inclined surface, it is possible to facilitate water droplets on the water guide plate and the side wall of the box cover to fall into the sealed water tank, and then the water on the water guide plate and the side wall of the box cover is scraped into the sealed water tank by the wiper mechanism, thereby reducing the possibility of water droplets on the box cover falling into the salt mist collector.

[0009] Preferably, the wiper mechanism includes two rotating shafts, which are rotatably arranged on both sides of the water diversion plate, and connecting blocks are rotatably arranged at both ends of the rotating shaft, and the connecting blocks are fixed to the main box body; a wiper plate is fixed on the rotating shaft, and the wiper plate can abut against the box cover, and the wiper plate can abut against the water diversion plate; a torsion spring is sleeved on the rotating shaft, one end of the torsion spring is fixedly connected to the wiper plate, and the other end of the torsion spring is fixedly connected to the main box body, and a rotating component for driving the wiper plate to rotate is provided on the main box body.

[0010] By adopting the above technical solution, when it is necessary to wipe the water on the water guide plate and the box cover, the elastic force of the two torsion springs drives the wiper plate to abut against the outer wall of the box cover or the water guide plate. When the box cover or the water guide plate moves relative to the wiper plate, the water on the box cover or the water guide plate can be easily scraped off. When it is necessary to close the box cover, the wiper plate is driven to rotate by the rotating assembly, which can reduce the possibility of the wiper plate blocking the closing of the box cover.

[0011] Preferably, the rotating assembly includes a driving rope, one end of the driving rope is wound around the rotating shaft, and the other end of the driving rope is fixedly connected to the foot pedal. A driving groove is provided on the outer wall of the main box body, and the foot pedal is slidably arranged on the inner wall of the driving groove. A second spring is provided in the driving groove, one end of the second spring is fixedly connected to the inner wall of the driving groove, and the other end of the second spring is fixedly connected to the foot pedal.

[0012] By adopting the above technical solution, when it is necessary to drive the wiper to rotate, the operator drives the foot pedal to move downward in the vertical direction. At this time, the second spring is in a compressed state. Through the setting of the drive rope, it is convenient to drive the wiper to rotate. When the operator releases the foot pedal, the foot pedal moves upward under the elastic force of the second spring, which makes it easy to reset the foot pedal.

[0013] Preferably, an observation hole is opened inside the box cover, the observation cover is fixedly connected to the inner wall of the observation hole, and a demisting mechanism for demisting the observation cover is provided on the inner wall of the observation hole.

[0014] By adopting the above technical solution, when the sample under test is subjected to a salt spray test, the observation cover will be blocked by a large amount of water vapor, making it inconvenient for the operator to observe the internal conditions of the main box. At this time, the defogger mechanism can be set to facilitate the removal of the fog on the observation cover, thereby facilitating the operator to observe the internal conditions of the main box.

[0015] Preferably, the defogger mechanism includes a defogger cloth, a driving block is slidingly provided on the inner wall of the observation hole, the defogger cloth is fixedly connected to the driving block, the defogger cloth can cooperate with the observation cover, and a driving assembly for driving the driving block to move is provided in the observation hole.

[0016] By adopting the above technical solution, when it is necessary to remove the fog on the observation cover, the driving block is first driven to move by the driving assembly, and the driving block drives the defogger cloth to move. Through the cooperation of the defogger cloth and the observation cover, the observation cover can be defogged easily.

[0017] Preferably, the driving assembly includes a screw, which is rotatably arranged on the inner wall of the observation hole, and the screw is threadedly engaged with the driving block; a first bevel gear is fixedly mounted on the screw, and a light rod is rotatably arranged on the box cover, and a second bevel gear is fixedly mounted on the light rod, the first bevel gear is meshed with the second bevel gear, and a handwheel is fixedly mounted on the light rod; a guide rod is fixedly connected to the inner wall of the observation hole, and the guide rod is slidably engaged with the driving block.

[0018] By adopting the above technical solution, when the driving block needs to be driven to move, the operator drives the light rod to rotate through the handwheel, the light rod drives the second bevel gear to rotate, the second bevel gear drives the first bevel gear to rotate, and the first bevel gear drives the lead screw to rotate. At the same time, under the guiding action of the guide rod on the driving block, it is easy to drive the driving block to move.

[0019] Preferably, the inner wall of the observation hole is connected to a plurality of first delivery pipes, and a plurality of negative pressure pumps are installed in the box cover. The plurality of negative pressure pumps are arranged in a one-to-one correspondence with the plurality of first delivery pipes. The input end of the negative pressure pump is connected to the first delivery pipe, and the output end of the negative pressure pump is connected to the second delivery pipe, and the second delivery pipe is connected to the first inclined surface.

[0020] By adopting the above technical solution, after the defogger mechanism removes the fog on the observation cover, a large amount of fog still remains in the observation hole, thereby preventing the operator from observing the internal situation of the main box body. At this time, multiple negative pressure pumps are started, and the fog in the observation hole can pass through the first delivery pipe, the negative pressure pump and the second delivery pipe in turn, and finally be delivered to the water in the sealed water tank, thereby making it easier to reduce the fog in the observation hole and making it easier for the operator to observe the internal situation of the main box body.

[0021] Preferably, a fan is installed on the box cover, the output end of the fan is connected to a third delivery pipe, the third delivery pipe is connected to a plurality of fourth delivery pipes, and the fourth delivery pipes are connected to the inner wall of the observation hole.

[0022] By adopting the above technical solution, when the negative pressure pump is started to suck out the fog in the observation hole, the fan is started to transport air into the observation hole through the third delivery pipe and the fourth delivery pipe, thereby forming an air duct, which makes it easier to suck out the fog in the observation hole.

[0023] Preferably, a guide block is fixedly connected to one side of the foot pedal, a guide groove is provided on the inner wall of the driving groove, and the guide block is slidably arranged on the inner wall of the guide groove.

[0024] By adopting the above technical solution, when the foot pedal moves in the vertical direction, the possibility of the foot pedal tilting can be reduced by setting the guide block and the guide groove, thereby facilitating the vertical movement of the foot pedal.

[0025] In summary, this application has the following beneficial effects:

[0026] 1. When the operator needs to open the box cover, the operator first drives the box cover to rotate through the box cover handle. At this time, the box cover is separated from the inner wall of the sealed water tank, and the water guide plate moves downward relative to the box cover under the elastic force of the first spring. When the first inclined surface is flush with the fourth inclined surface, and the second inclined surface is flush with the third inclined surface, it is easy for water droplets on the water guide plate and the side wall of the box cover to fall into the sealed water tank. Then, the water on the water guide plate and the side wall of the box cover is scraped into the sealed water tank by the wiper mechanism, thereby reducing the possibility of water droplets on the box cover falling into the salt mist collector;

[0027] 2. When the water diversion plate and the tank cover need to be wiped, the elastic force of the two torsion springs drives the wiper plate to abut against the outer wall of the tank cover or the water diversion plate. When the tank cover or the water diversion plate moves relative to the wiper plate, the water on the tank cover or the water diversion plate can be scraped off. When the tank cover needs to be closed, the wiper plate is driven to rotate by the rotating assembly, thereby reducing the possibility of the wiper plate blocking the tank cover from closing.

[0028] 3. After the defogger mechanism removes the fog on the observation cover, a large amount of fog still remains in the observation hole, thereby preventing the operator from observing the internal situation of the main box body. At this time, multiple negative pressure pumps are started, and the fog in the observation hole can pass through the first delivery pipe, the negative pressure pump and the second delivery pipe in turn, and finally be delivered to the water in the sealed water tank, thereby making it easier to reduce the fog in the observation hole and making it easier for the operator to observe the internal situation of the main box body. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 is a cross-sectional view showing the wiper mechanism of the present invention;

[0031] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle;

[0032] Figure 4 yes Figure 2 A partial enlarged view of point B in the middle;

[0033] Figure 5 is a cross-sectional view showing the demisting mechanism of the present invention;

[0034] Figure 6 yes Figure 5 A partial enlarged view of point A in the middle.

[0035] Explanation of reference numerals: 1. Main box body; 11. Box cover; 12. Observation cover; 13. Observation hole; 14. Sealed water tank; 15. Box cover handle; 16. Sliding groove; 17. Water guide plate; 171. First inclined plane; 172. Second inclined plane; 173. Third inclined plane; 174. Fourth inclined plane; 18. First spring; 2. Wiper mechanism; 211. Rotating shaft; 212. Connecting block; 213. Wiper plate; 214. Torsion spring; 22. Rotating assembly; 221. Drive rope; 222. Foot pedal ; 223, drive groove; 224, second spring; 225, guide block; 226, guide groove; 3, defogger mechanism; 311, defogger cloth; 312, drive block; 32, drive assembly; 321, lead screw; 322, first bevel gear; 323, second bevel gear; 324, light rod; 325, handwheel; 326, guide rod; 331, first delivery pipe; 332, negative pressure pump; 333, second delivery pipe; 334, fan; 335, third delivery pipe; 336, fourth delivery pipe. DETAILED DESCRIPTION

[0036] The following is combined with Figures 1-6 This application is described in further detail.

[0037] The utility model discloses a salt spray test machine, such as Figure 1 As shown, it includes a main box body 1, which is square in shape. A box cover 11 is provided on the main box body 1, and an observation cover 12 is provided on the box cover 11. The observation cover 12 is made of transparent material, such as glass or acrylic plate.

[0038] like Figure 1 and Figure 2 As shown, a sealed water tank 14 is provided on the main box body 1 , the cross section of the sealed water tank 14 is square ring-shaped and extends in the vertical direction, and a box cover 11 handle is fixedly connected to the box cover 11 , and the box cover 11 handle is cylindrical.

[0039] like Figure 2 and Figure 3As shown, a sliding groove 16 is provided on one side wall of the box cover 11 close to the sealed water tank 14. The cross section of the sliding groove 16 is square and extends in the vertical direction. A water diversion plate 17 is provided on the inner wall of the sliding groove 16 so as to slide in the vertical direction. The cross section of the water diversion plate 17 is square. The water diversion plate 17 can abut against the inner wall of the sealed water tank 14. A plurality of first springs 18 are provided in the sliding groove 16. The first spring 18 is provided in the vertical direction. One end of the first spring 18 is fixedly connected to the top of the water diversion plate 17, and the other end of the first spring 18 is fixedly connected to the inner wall of the sliding groove 16. A first inclined surface 171 is provided on the side of the water diversion plate 17 close to the handle of the box cover 11. A second inclined surface 172 is provided on the side away from the handle of the box cover 11, and the angles between the first inclined surface 171 and the second inclined surface 172 and the inner bottom wall of the sealed water tank 14 are equal. A fourth inclined surface 174 is provided on the side of the box cover 11 close to the water guide plate 17, and the first inclined surface 171 can cooperate with the fourth inclined surface 174, and the first inclined surface 171 and the fourth inclined surface 174 can be flush. A third inclined surface 173 is provided on the side of the box cover 11 close to the water guide plate 17, and the second inclined surface 172 can cooperate with the third inclined surface 173, and the second inclined surface 172 can be flush with the third inclined surface 173. A wiper mechanism 2 for wiping the water guide plate 17 is provided on the main box body 1.

[0040] When the operator needs to open the box cover 11, the operator first drives the box cover 11 to rotate through the box cover 11 handle. At this time, the box cover 11 is separated from the inner wall of the sealed water tank 14, and the water guide plate 17 moves downward relative to the box cover 11 under the elastic force of the first spring 18. When the first inclined surface 171 is flush with the third inclined surface 173 and the second inclined surface 172 is flush with the fourth inclined surface 174, it is convenient for the water guide plate 17 and the side wall of the box cover 11 to drop into the sealed water tank 14, and then the water on the water guide plate 17 and the side wall of the box cover 11 is scraped into the sealed water tank 14 by the wiper mechanism 2, thereby reducing the possibility of water droplets on the box cover 11 falling into the salt mist collector.

[0041] like Figure 2 and Figure 3As shown, the wiper mechanism 2 includes two rotating shafts 211, the cross-section of the rotating shaft 211 is circular and is arranged along the length direction of the main box body 1, the two rotating shafts 211 are respectively rotatably arranged on the left and right sides of the water diversion plate 17, and both ends of the rotating shaft 211 are rotatably provided with connecting blocks 212, the cross-section of the connecting block 212 is square, and the connecting block 212 is fixed to the top of the main box body 1; a wiper plate 213 is fixed on the rotating shaft 211, the cross-section of the wiper plate 213 is square, the wiper plate 213 can abut against the outer wall of the box cover 11, and the wiper plate 213 can abut against the outer wall of the water diversion plate 17; a torsion spring 214 is sleeved on the rotating shaft 211, and the torsion spring 214 is arranged along the axial direction of the rotating shaft 211, one end of the torsion spring 214 is fixedly connected to the wiper plate 213, and the other end of the torsion spring 214 is fixedly connected to the main box body 1, and a rotating component 22 for driving the wiper plate 213 to rotate is provided on the main box body 1.

[0042] When it is necessary to wipe the water on the water guide plate 17 and the tank cover 11, the elastic force of the two torsion springs 214 drives the wiper plate 213 to abut against the outer wall of the tank cover 11 or the water guide plate 17. When the tank cover 11 or the water guide plate 17 moves relative to the wiper plate 213, the water on the tank cover 11 or the water guide plate 17 can be scraped off. When it is necessary to close the tank cover 11, the wiper plate 213 is driven to rotate by the rotating component 22, so as to reduce the possibility of the wiper plate 213 blocking the tank cover 11 from closing.

[0043] like Figure 2 、 Figure 3 and Figure 4 As shown, the rotating assembly 22 includes a driving rope 221, the cross-section of the driving rope 221 is circular, one end of the driving rope 221 is wound around the rotating shaft 211, and the other end of the driving rope 221 is fixedly connected to the foot pedal 222, the cross-section of the foot pedal 222 is square, and the outer wall of the main box 1 is provided with a driving groove 223, the cross-section of the driving groove 223 is square and extends in the vertical direction, the foot pedal 222 is slidably arranged on the inner wall of the driving groove 223 in the vertical direction, and a second spring 224 is arranged in the driving groove 223, the second spring 224 is arranged in the vertical direction, one end of the second spring 224 is fixedly connected to the inner wall of the driving groove 223, and the other end of the second spring 224 is fixedly connected to the bottom of the foot pedal 222.

[0044] When it is necessary to drive the wiper 213 to rotate, the operator drives the foot pedal 222 to move downward in the vertical direction. At this time, the second spring 224 is in a compressed state. Through the setting of the drive rope 221, it is convenient to drive the wiper 213 to rotate. When the operator releases the foot pedal 222, the foot pedal 222 moves upward under the elastic force of the second spring 224, so that the foot pedal 222 can be easily reset.

[0045] like Figure 2 and Figure 4 As shown, a guide block 225 is fixedly connected to one side of the footrest 222. The guide block 225 has a dovetail-shaped cross section. A guide slot 226 is defined on the inner wall of the driving slot 223. The guide slot 226 has a dovetail-shaped cross section and extends in the vertical direction. The guide block 225 is slidably disposed vertically on the inner wall of the guide slot 226. When the footrest 222 moves vertically, the provision of the guide block 225 and the guide slot 226 can reduce the possibility of the footrest 222 slipping, thereby facilitating vertical movement of the footrest 222.

[0046] like Figure 5 and Figure 6 As shown, an observation hole 13 is provided on the interior of the box cover 11. The cross-section of the observation hole 13 is square. The observation cover 12 is fixedly connected to the inner wall of the observation hole 13. The cross-section of the observation cover 12 is square and its area is equal to the cross-sectional area of the observation hole 13. A demisting mechanism 3 is provided on the inner wall of the observation hole 13 for demisting the observation cover 12. When the sample under test is subjected to a salt spray test, the observation cover 12 is obscured by a large amount of water vapor, making it difficult for the operator to observe the interior of the main box body 1. In this case, the provision of the demisting mechanism 3 can facilitate the removal of the mist on the observation cover 12, thereby making it easier for the operator to observe the interior of the main box body 1.

[0047] like Figure 5 and Figure 6 As shown, the demisting mechanism 3 includes a demisting cloth 311, which is relatively soft in texture. A driving block 312 is provided on the inner wall of the observation hole 13. The cross-section of the driving block 312 is square. The driving block 312 is slidably provided on the inner wall of the observation hole 13 along the length direction of the observation cover 12. The demisting cloth 311 is fixedly connected to the driving block 312. The demisting cloth 311 can cooperate with the observation cover 12. A driving assembly 32 is provided in the observation hole 13 for driving the driving block 312 to move along the length direction of the observation cover 12. When it is necessary to remove the mist on the observation cover 12, the driving block 312 is first driven to move by the driving assembly 32, and the driving block 312 drives the demisting cloth 311 to move. Through the cooperation of the demisting cloth 311 and the observation cover 12, the observation cover 12 can be easily demisted.

[0048] like Figure 5 and Figure 6When the cam 32 is in the unlock position, the first gear 322 is locked and the second gear 323 is locked. As shown in FIG32, the driving assembly 32 includes a screw shaft 321, which is arranged along the length direction of the observation cover 12. Both ends of the screw shaft 321 are rotatably arranged on the inner wall of the observation hole 13 through bearings. The screw shaft 321 passes through the driving block 312, and the screw shaft 321 is threadedly engaged with the driving block 312; a first bevel gear 322 is sleeved and fixed on the screw shaft 321, and a light rod 324 is rotatably set on the box cover 11. The cross section of the light rod 324 is circular, and a second bevel gear 323 is sleeved and fixed on the light rod 324. The first bevel gear 322 meshes with the second bevel gear 323, and a handwheel 325 is sleeved and fixed on the light rod 324, and the handwheel 325 is arranged on the outside of the box cover 11; the inner wall of the observation hole 13 is fixedly connected to a guide rod 326, which is arranged along the axial direction of the screw shaft 321, and the guide rod 326 passes through the driving block 312, and the guide rod 326 slides with the driving block 312 along the length direction of the observation cover 12.

[0049] When it is necessary to drive the driving block 312 to move, the operator drives the light rod 324 to rotate through the hand wheel 325, the light rod 324 drives the second bevel gear 323 to rotate, the second bevel gear 323 drives the first bevel gear 322 to rotate, and the first bevel gear 322 drives the lead screw 321 to rotate. At the same time, under the guiding action of the guide rod 326 on the driving block 312, the driving block 312 can be easily driven to move.

[0050] like Figure 5 and Figure 6 As shown, the inner wall of the observation hole 13 is connected with a plurality of first delivery pipes 331, the cross section of the first delivery pipe 331 is annular, and a plurality of negative pressure pumps 332 are installed in the box cover 11 by bolts. The plurality of negative pressure pumps 332 are arranged in a one-to-one correspondence with the plurality of first delivery pipes 331, and the input end of the negative pressure pump 332 is connected to the first delivery pipe 331, and the output end of the negative pressure pump 332 is connected to the second delivery pipe 333. The texture of the second delivery pipe 333 is relatively soft. When the water guide plate 17 is released relative to the box cover 11, the water supply pipe 333 is opened. When displacement occurs, the second conveying pipe 333 can be stretched; the second conveying pipe 333 is connected to the first inclined surface 171, and a fan 334 is installed on the outer wall of the box cover 11 by bolts. The output end of the fan 334 is connected to the third conveying pipe 335, and the cross section of the third conveying pipe 335 is annular. The third conveying pipe 335 is connected to multiple fourth conveying pipes 336, and the cross section of the fourth conveying pipe 336 is annular. The fourth conveying pipe 336 is connected to the inner wall of the observation hole 13.

[0051] After the defogger mechanism 3 removes the fog on the observation cover 12, a large amount of fog still remains in the observation hole 13, thereby preventing the operator from observing the internal situation of the main box body 1. At this time, multiple negative pressure pumps 332 are started, and the fog in the observation hole 13 can pass through the first delivery pipe 331, the negative pressure pump 332 and the second delivery pipe 333 in turn, and finally be delivered to the water in the sealed water tank 14, so as to facilitate the reduction of the fog in the observation hole 13, and thus facilitate the operator to observe the internal situation of the main box body 1; when the negative pressure pump 332 is started to absorb the fog in the observation hole 13, the fan 334 is started to deliver air to the observation hole 13 through the third delivery pipe 335 and the fourth delivery pipe 336, thereby forming an air duct, which can facilitate the absorption of the fog in the observation hole 13.

[0052] The implementation principle of a salt spray tester in the embodiment of the present application is as follows:

[0053] When the operator needs to open the box cover 11, the operator first drives the box cover 11 to rotate through the box cover 11 handle. At this time, the box cover 11 is separated from the inner wall of the sealed water tank 14, and the water guide plate 17 moves downward relative to the box cover 11 under the elastic force of the first spring 18. When the first inclined surface 171 is flush with the third inclined surface 173 and the second inclined surface 172 is flush with the fourth inclined surface 174, it is convenient for the water guide plate 17 and the side wall of the box cover 11 to drop into the sealed water tank 14, and then the water on the water guide plate 17 and the side wall of the box cover 11 is scraped into the sealed water tank 14 by the wiper mechanism 2, thereby reducing the possibility of water droplets on the box cover 11 falling into the salt mist collector.

[0054] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A salt spray tester, comprising a main box (1), a box cover (11) provided on the main box (1), an observation cover (12) provided on the box cover (11), a sealed water tank (14) provided on the main box (1), and a box cover (11) handle fixedly connected to the box cover (11), characterized in that: The box cover (11) is provided with a sliding groove (16) on one side wall close to the sealed water tank (14), and a water guide plate (17) is provided in the sliding groove (16) for sliding. The water guide plate (17) can abut against the inner wall of the sealed water tank (14), and a plurality of first springs (18) are provided in the sliding groove (16), one end of the first spring (18) is fixedly connected to the water guide plate (17), and the other end of the first spring (18) is fixedly connected to the inner wall of the sliding groove (16); the water guide plate (17) is provided with a first inclined surface (17) on one side close to the handle of the box cover (11). 1), a second inclined surface (172) is provided on a side of the water guide plate (17) away from the handle of the box cover (11), a fourth inclined surface (174) is provided on a side of the box cover (11) close to the water guide plate (17), the first inclined surface (171) can be matched with the fourth inclined surface (174), a third inclined surface (173) is provided on a side of the box cover (11) close to the water guide plate (17), the second inclined surface (172) can be matched with the third inclined surface (173), and a wiper mechanism (2) for wiping the water guide plate (17) is provided on the main box body (1); An observation hole (13) is provided inside the box cover (11), the observation cover (12) is fixedly connected to the inner wall of the observation hole (13), and a demisting mechanism (3) for demisting the observation cover (12) is provided on the inner wall of the observation hole (13); The inner wall of the observation hole (13) is connected to a plurality of first delivery pipes (331), and a plurality of negative pressure pumps (332) are installed in the box cover (11). The plurality of negative pressure pumps (332) are arranged in a one-to-one correspondence with the plurality of first delivery pipes (331). The input end of the negative pressure pump (332) is connected to the first delivery pipe (331), and the output end of the negative pressure pump (332) is connected to the second delivery pipe (333), and the second delivery pipe (333) is connected to the first inclined surface (171).

2. A salt spray tester according to claim 1, characterized in that: The wiper mechanism (2) comprises two rotating shafts (211), the two rotating shafts (211) are rotatably arranged on both sides of the water guide plate (17), and both ends of the rotating shaft (211) are rotatably arranged with connecting blocks (212), and the connecting blocks (212) are fixed to the main box (1); a wiper plate (213) is fixedly mounted on the rotating shaft (211), and the wiper plate (213) can abut against the box cover (11), and the wiper plate (213) can abut against the water guide plate (17); a torsion spring (214) is mounted on the rotating shaft (211), one end of the torsion spring (214) is fixedly connected to the wiper plate (213), and the other end of the torsion spring (214) is fixedly connected to the main box (1), and a rotating assembly (22) for driving the wiper plate (213) to rotate is provided on the main box (1).

3. A salt spray tester according to claim 2, characterized in that: The rotating assembly (22) includes a driving rope (221), one end of the driving rope (221) is wound around the rotating shaft (211), and the other end of the driving rope (221) is fixedly connected to a foot pedal (222). The outer wall of the main box (1) is provided with a driving groove (223), and the foot pedal (222) is slidably arranged on the inner wall of the driving groove (223). A second spring (224) is arranged in the driving groove (223), one end of the second spring (224) is fixedly connected to the inner wall of the driving groove (223), and the other end of the second spring (224) is fixedly connected to the foot pedal (222).

4. A salt spray tester according to claim 1, characterized in that: The demisting mechanism (3) comprises a demisting cloth (311); a driving block (312) is slidably provided on the inner wall of the observation hole (13); the demisting cloth (311) is fixedly connected to the driving block (312); the demisting cloth (311) can cooperate with the observation cover (12); and a driving assembly (32) for driving the driving block (312) to move is provided in the observation hole (13).

5. A salt spray tester according to claim 4, characterized in that: The driving assembly (32) includes a lead screw (321), which is rotatably arranged on the inner wall of the observation hole (13), and the lead screw (321) is threadedly engaged with the driving block (312); a first bevel gear (322) is fixedly sleeved on the lead screw (321), a light rod (324) is rotatably arranged on the box cover (11), a second bevel gear (323) is sleeved and fixed on the light rod (324), the first bevel gear (322) is meshed with the second bevel gear (323), and a hand wheel (325) is sleeved and fixed on the light rod (324); a guide rod (326) is fixedly connected to the inner wall of the observation hole (13), and the guide rod (326) is slidably engaged with the driving block (312).

6. A salt spray tester according to claim 1, characterized in that: A fan (334) is installed on the box cover (11), and the output end of the fan (334) is connected to a third delivery pipe (335). The third delivery pipe (335) is connected to a plurality of fourth delivery pipes (336), and the fourth delivery pipes (336) are connected to the inner wall of the observation hole (13).

7. A salt spray tester according to claim 3, characterized in that: A guide block (225) is fixedly connected to one side of the foot pedal (222), a guide groove (226) is provided on the inner wall of the driving groove (223), and the guide block (225) is slidably arranged on the inner wall of the guide groove (226).

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