CN210198926U

CN210198926U - Salt fog test box

Info

Publication number: CN210198926U
Application number: CN201920839943.1U
Authority: CN
Inventors: Xifeng Lang; 郎锡锋
Original assignee: Jiangsu Anying Environmental Equipment Co Ltd
Current assignee: Jiangsu Anying Environmental Equipment Co Ltd
Priority date: 2019-06-04
Filing date: 2019-06-04
Publication date: 2020-03-27
Anticipated expiration: 2029-06-04

Abstract

The utility model relates to the technical field of test equipment, aim at providing a salt fog test box, its technical scheme main points are including test box main part and case lid, the case lid sets up on the test box main part, still include the defogging device that sets up in the test box main part, the defogging device includes removal brush, carriage release lever, drive mechanism and drive arrangement, drive mechanism includes drive sprocket, driven sprocket, chain and movable block, drive sprocket and driven sprocket are connected with the test box main part lateral wall, the chain cover is established on drive sprocket and driven sprocket and is tensioned by drive sprocket and driven sprocket, the movable block sets up on the chain, the movable block is connected to one end of carriage release lever, the other end connects the removal brush, and the removal brush is contradicted the case lid; the salt spray test box can clear away water spray on the box cover, so that the change condition of the surface of a detection sample can be observed directly through the box cover, the box cover does not need to be opened, the detection sample does not need to be taken out for observation, and convenience is brought for observing the detection sample.

Description

Salt fog test box

Technical Field

The utility model relates to a test equipment's technical field, in particular to salt fog proof box.

Background

The metal corrosion test is used to test the corrosion resistance of metals and to measure the service life of metals. But the corrosion time of the metal in the atmospheric environment under natural conditions is longer. In order to obtain the results of corrosion resistance and service life of metal more quickly, the experiment on metal corrosion is usually carried out in a salt spray test box when designing metal materials. The salt spray test is generally regarded as a standard for testing the corrosion resistance of a sample, so that the accuracy of the test result is important.

Chinese patent No. CN2757120 discloses a salt spray corrosion test chamber, which has a salt spray tank with a sealed water tank, a top cover of the salt spray tank, an auxiliary tank, a salt spray tank assembly, a spray tower including a nozzle, a tested sample rack assembly including a supporting angle iron and a supporting rod, a saturated air barrel assembly including a compressed air conduit, an air pressure control assembly including an air inlet pressure regulating valve and a spray air inlet pressure regulating valve, a control assembly including a salt spray tank temperature control sensor, a time control assembly including a test timing controller and a periodic intermittent spray timing controller, a waste discharge assembly including a salt spray tank waste gas discharge valve and a saturated air barrel waste water discharge valve, a metering assembly including a salt spray collector and a metering cylinder for measuring the amount of salt spray in the salt spray tank, and an operation controller having a circuit board; the spraying tower and the tested sample rack assembly are arranged in the salt spray box; the saturated air barrel component is arranged in the auxiliary box; the salt spray tank top cover is hinged with the salt spray tank through a hinge component, and the salt spray tank component consists of a water tank for heating salt water, an electric heating pipe, a salt water outlet pipe outer sleeve and a water tank cover plate; the brine tank component is arranged at the bottom of the brine mist tank; the electric heating pipe is arranged in the water tank; one end of the outer sleeve of the brine eduction tube passes through the bottom plate of the water tank and the peripheral wall of the outer sleeve is connected with the bottom plate in a sealing way, and the other end of the outer sleeve of the brine eduction tube extends out of the liquid level of the water stored in the water tank; the water tank cover plate covers the water tank; the water tank is welded and hermetically connected with the inner wall of the salt spray box through a peripheral flange, and a salt water storage chamber is formed between the water tank and the salt spray box; the saline water outlet pipe connected with the saline water inlet pipe of the nozzle arranged in the spray tower can be inserted into the saline water storage chamber through the outer sleeve of the saline water outlet pipe.

Although the salt spray test box can perform a salt spray test, when the salt spray resistance test time of a test sample is determined, the change condition of the surface of the test sample needs to be observed at a specific time, and the box cover of the salt spray test box is full of water spray and cannot be directly observed through the box cover, so that the box cover needs to be opened, the test sample is taken out for observation, and inconvenience is brought to the observation of the test sample.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a salt spray proof box, it can clear away the water smoke on the case lid to can directly observe the situation of change on testing sample surface through the case lid, need not open the case lid and take out testing sample and observe, bring the convenience for observing testing sample.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides a salt fog test box, includes test box main part and case lid, the case lid sets up in the test box main part, still including setting up the defogging device in the test box main part, the defogging device includes removal brush, carriage release lever, drive mechanism and drive arrangement, and drive mechanism includes drive sprocket, driven sprocket, chain and movable block, drive sprocket and driven sprocket rotate with test box main part lateral wall respectively and are connected, drive arrangement sets up in the test box main part and links with drive sprocket, the chain cover is established on drive sprocket and driven sprocket and is tensioned by drive sprocket and driven sprocket, the movable block sets up on the chain, the movable block is connected to the one end of carriage release lever, and the removal brush is connected to the other end, and the removal brush is contradicted the case lid.

Through adopting above-mentioned technical scheme, when the internal test sample of observation box, start drive arrangement, drive arrangement drive sprocket rotates, drive sprocket passes through the chain and drives driven sprocket and rotate, drive sprocket and driven sprocket rotate together and drive the chain and continuously rotate, the chain drives the removal piece at the removal in-process and removes, the movable block passes through the carriage release lever and drives the removal brush and remove, the removal brush is cleaing away the water smoke on the case lid at the removal in-process, thereby can directly observe the change condition on test sample surface through the case lid, need not open the case lid and take out the test sample and observe, bring the convenience for observing test sample.

Further setting: the two groups of transmission mechanisms are respectively arranged on two opposite side walls of the test box main body.

Through adopting above-mentioned technical scheme, set up drive mechanism into two sets ofly, two sets of drive mechanism drive corresponding removal brush respectively and remove, and two removal brushes remove together to clear away the water smoke on two faces around the case lid, so that can be more clear observe the change condition on the detection sample surface in the box.

Further setting: the two groups of transmission mechanisms share one driving device, the driving device comprises a motor, a first bevel gear, a second bevel gear and a transmission shaft, the motor is arranged on the test box main body, the first bevel gear is arranged on the motor, two ends of the transmission shaft are linked with driving chain wheels of the two groups of transmission mechanisms, the second bevel gear is arranged on the transmission shaft, and the first bevel gear is meshed with the second bevel gear.

Through adopting above-mentioned technical scheme, the starter motor, the motor drives first bevel gear and rotates, and first bevel gear drives second bevel gear and rotates in the rotation process, and second bevel gear drives the transmission shaft and rotates, and the transmission shaft drives the drive sprocket at both ends and rotates to realize that a motor drives two drive sprocket pivoted purposes simultaneously, compare with a motor drive sprocket and rotate, saved more energy.

Further setting: still be equipped with straining device on the test box main part, straining device includes tensioning sprocket and tensioning board, tensioning board and test box main part lateral wall sliding fit, pass through the screw fastening between tensioning board and the test box main part, tensioning sprocket rotates to be connected in tensioning board, and tensioning sprocket and chain meshing and with the chain tensioning.

By adopting the technical scheme, when the chain is loosened, the screw for fastening the tensioning plate is detached, the tensioning plate is moved, the tensioning plate drives the tensioning chain wheel to move in the moving process, so that the chain is tensioned again by the tensioning chain wheel, and the tensioning plate is fixed again by the screw after the chain is tensioned again by the tensioning chain wheel, so that the tensioning process is completed.

Further setting: the test box is characterized in that a dovetail groove is formed in the test box main body, a dovetail strip is arranged on the tensioning plate, and the dovetail strip is in sliding fit with the dovetail groove.

Through adopting above-mentioned technical scheme, when removing the tensioning plate, the dovetail slides along the dovetail, on the one hand, can lead the moving direction of tensioning plate, and on the other hand can carry on spacingly to the tensioning plate, avoids the tensioning plate to have the trend that moves towards deviating from test box main part direction at the removal in-process, has improved the stability of tensioning plate at the removal in-process.

Further setting: the test box is characterized in that a protective shell used for shielding the transmission mechanism and the driving device is arranged on the test box main body, a sliding opening is formed in the protective shell, and the moving rod penetrates through the sliding opening.

Through adopting above-mentioned technical scheme, because salt fog has corrosivity, the setting of protecting crust can be protected drive mechanism and drive arrangement, has reduced drive mechanism and protector by the possibility that salt fog corrodes.

Further setting: the protective shell is detachably connected with the test box main body.

Through adopting above-mentioned technical scheme, if drive mechanism or protector break down, then can dismantle the protecting crust get off, maintain drive mechanism or protector, for bringing the convenience for the maintenance.

Further setting: the movable brush comprises a movable plate and a rubber block, the movable plate is connected with the movable rod, the rubber block is arranged on the movable plate, and the rubber block abuts against the box cover.

Through adopting above-mentioned technical scheme, because the block rubber has corrosion resisting property, the carriage release lever passes through the movable plate and drives the block rubber removal, clears away the water smoke on the case lid, compares with setting up the brush for other non-corrosion resistant materials that will remove, can increase the life of removing the brush.

Further setting: the rubber block is detachably connected with the moving plate.

Through adopting above-mentioned technical scheme, if the block rubber is damaged, can dismantle the block rubber that damages get off and change to it can continue to clear away water smoke to move the brush.

Further setting: the movable plate is provided with a groove and a through hole, the rubber block is provided with a mounting hole, a spring is arranged in the mounting hole, the spring is connected with a mounting rod, the rubber block is arranged in the groove, and when the spring is in a natural state, one end, deviating from the spring, of the mounting rod is arranged in the through hole.

By adopting the technical scheme, when the rubber block is installed, force is applied to the installation rod, the spring is changed from a natural state to a compressed state, the installation rod is completely pressed back into the installation hole, the rubber block is placed in the groove, when the installation hole is aligned with the through hole, the spring is changed from the compressed state to the natural state, the installation rod moves towards the direction of the through hole under the action of the elastic force of the spring, one end of the installation rod is positioned in the through hole, the other end of the installation rod is positioned in the installation hole, and therefore the installation of the rubber block is completed; when the rubber block is disassembled, pressure is applied to the mounting rods through the through holes, the mounting rods are all pressed back into the mounting holes, and the connection between the rubber block and the moving plate is removed, so that the purpose of disassembling the rubber block is achieved.

To sum up, the utility model discloses following beneficial effect has:

1. when a detection sample in the box body is observed, the driving device is started, the driving device drives the driving chain wheel to rotate, the driving chain wheel drives the driven chain wheel to rotate through the chain, the driving chain wheel and the driven chain wheel rotate together to drive the chain to continuously rotate, the chain drives the moving block to move in the moving process, the moving block drives the moving brush to move through the moving rod, and the moving brush removes water mist on the box cover in the moving process, so that the change condition of the surface of the detection sample can be directly observed through the box cover, the box cover does not need to be opened, the detection sample does not need to be taken out for observation, and;

2. the motor is started, the motor drives the first bevel gear to rotate, the first bevel gear drives the second bevel gear to rotate in the rotating process, the second bevel gear drives the transmission shaft to rotate, and the transmission shaft drives the driving sprockets at two ends to rotate, so that the purpose that one motor drives two driving sprockets to rotate simultaneously is achieved, and compared with the mode that one motor drives one driving sprocket to rotate, more energy is saved;

3. if the rubber block is damaged, the damaged rubber block can be detached for replacement, so that the movable brush can continuously remove the water mist.

Drawings

Fig. 1 is a schematic structural diagram for embodying the present invention in the present embodiment;

FIG. 2 is a schematic structural diagram of the present embodiment for embodying the transmission mechanism;

FIG. 3 is a schematic structural view of a movable brush according to the present embodiment;

FIG. 4 is a schematic structural diagram for showing the positional relationship between the movable brush and the cover in the present embodiment;

FIG. 5 is a schematic structural diagram for showing the connection relationship between the moving plate and the rubber block in the present embodiment;

FIG. 6 is an enlarged view of portion A of FIG. 2 showing the tensioning mechanism;

FIG. 7 is a schematic structural view for showing the connection relationship between the tension sprocket and the tension plate in the present embodiment;

fig. 8 is a schematic structural diagram for showing a positional relationship between the transmission protective housing and the driving protective housing in the present embodiment.

In the figure, 1, test chamber main body; 2. a box cover; 3. a protective shell; 4. moving the brush; 5. a travel bar; 6. a transmission mechanism; 7. a drive device; 8. a drive sprocket; 9. a driven sprocket; 10. a chain; 11. a moving block; 12. a drive shaft; 13. a driven shaft; 14. a motor; 15. a first bevel gear; 16. a second bevel gear; 17. a drive shaft; 18. a connecting shaft; 19. a guide bar; 20. a horizontal bar; 21. a vertical rod; 22. a locking groove; 23. moving the plate; 24. a rubber block; 25. a groove; 26. a through hole; 27. mounting holes; 28. a spring; 29. mounting a rod; 30. a tensioning mechanism; 31. a tension sprocket; 32. a tension plate; 33. a dovetail groove; 34. connecting blocks; 35. a dovetail strip; 36. tensioning the shaft; 37. a transmission protective shell; 38. driving the protective shell; 39. a sliding port; 40. a support frame.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b): a salt spray test box is shown in figure 1 and comprises a test box main body 1 and a box cover 2, wherein the box cover 2 is arranged on the test box main body 1, and the box cover 2 is hinged with the test box main body 1.

As shown in fig. 1 and 2, a defogging device and a protective shell 3 are arranged in the test box main body 1, and the defogging device comprises a movable brush 4, a movable rod 5, a transmission mechanism 6 and a driving device 7.

As shown in fig. 2 and 3, the transmission mechanisms 6 are arranged into two groups, two groups of transmission mechanisms 6 are respectively arranged on two opposite side walls of the test box main body 1, each transmission mechanism 6 comprises a driving chain wheel 8, a driven chain wheel 9, a chain 10 and a moving block 11, the driving chain wheels 8 and the driven chain wheels 9 are respectively rotatably connected with the side walls of the test box main body 1 through driving shafts 12 and driven shafts 13, the driving shafts 12 and the driven shafts 13 are respectively rotatably connected with the side walls of the test box main body 1, the driving chain wheels 8 and the driven chain wheels 9 are respectively arranged on the driving shafts 12 and the driven shafts 13, and the chains 10 are sleeved on the driving chain wheels 8 and the driven chain wheels 9 and tensioned by the driving chain.

As shown in fig. 2 and 3, the driving device 7 is disposed on the test box main body 1 and is linked with the driving sprocket 8, two sets of transmission mechanisms 6 share one driving device 7, the driving device 7 includes a motor 14, a first bevel gear 15, a second bevel gear 16 and a transmission shaft 17, the motor 14 is disposed outside the test box main body 1, the first bevel gear 15 is connected with the motor 14 through a connection shaft 18, the connection shaft 18 is rotatably connected with the test box main body 1, one end of the connection is connected with the motor 14, the other end of the connection is connected with the first bevel gear 15, two ends of the transmission shaft 17 are connected with the driving shafts 12 on the driving sprockets 8 of the two sets of transmission mechanisms 6, a support frame 40 is disposed on the test box main body 1, the transmission shaft 17 is rotatably connected with the support frame 40, the second bevel gear 16 is disposed on the.

The motor 14 is started, the motor 14 drives the connecting shaft 18 to rotate, the connecting shaft 18 drives the first bevel gear 15 to rotate, the first bevel gear 15 drives the second bevel gear 16 to rotate, the second bevel gear 16 drives the transmission shaft 17 to rotate, the transmission shaft 17 drives the driving shafts 12 at two ends to rotate, the driving shafts 12 drive the driving chain wheel 8 to rotate, the driving chain wheel 8 drives the driven chain wheel 9 to rotate through the chain 10, and the driven chain wheel 9 and the driving chain wheel 8 rotate together to drive the chain 10 to continuously rotate.

As shown in fig. 2 and 3, the moving block 11 is arranged on the chain 10, the side wall of the test box is further provided with a guide rod 19, and the guide rod 19 penetrates through the moving block 11 so as to guide the moving direction of the moving block 11, thereby reducing the possibility of shaking of the moving block 11 in the moving process.

As shown in fig. 3 and 4, the moving block 11 is connected to one end of the moving rod 5, the moving brush 4 is connected to the other end, the moving rod 5 is set to be "L" shaped, the moving rod 5 comprises a horizontal rod 20 and a vertical rod 21, the moving block 11 is connected to one end of the horizontal rod 20, a locking groove 22 is formed in the side wall of the other end, one end of the vertical rod 21 is inserted into the locking groove 22, a screw is screwed on the horizontal rod 20 and penetrates through the locking groove 22 and the vertical rod 21, so that the vertical rod 21 is fixed, the moving brush 4 is connected to the other end of the vertical rod 21, and the moving brush 4 abuts against the box cover 2.

The chain 10 drives the moving block 11 to move in the rotating process, the moving block 11 drives the moving rod 5 to move, the moving brush 4 moves along with the moving rod 5, and in the moving process of the moving brush, the moving brush 4 removes water mist on the box cover 2.

As shown in fig. 4 and 5, the movable brush 4 includes a movable plate 23 and a rubber block 24, the movable plate 23 is connected to the vertical rod 21, the rubber block 24 is disposed on the movable plate 23, the rubber block 24 is detachably connected to the movable plate 23, the movable plate 23 is provided with a groove 25 and a through hole 26, the rubber block 24 is provided with a mounting hole 27, a spring 28 is disposed in the mounting hole 27, the spring 28 is connected to a mounting rod 29, the rubber block 24 is disposed in the groove 25, when the spring 28 is in a natural state, one end of the mounting rod 29 departing from the spring 28 is disposed in the through hole 26, and the rubber block 24 abuts against the case cover 2.

When the rubber block 24 is removed, the through hole 26 applies pressure to the mounting rod 29, the spring 28 is changed from a natural state to a compressed state, and when the mounting rod 29 is completely moved into the mounting hole 27, the connection between the rubber block 24 and the moving plate 23 is released, and the removal of the rubber block 24 is completed.

When the rubber block 24 is mounted, the mounting rod 29 is forced to press the mounting rod 29 back into the mounting hole 27, the rubber block 24 is placed in the groove 25, and when the mounting hole 27 is aligned with the through hole 26, the mounting rod 29 moves towards the through hole 26 under the elastic force of the spring 28, so that one end of the mounting rod 29 is located in the through hole 26, and the other end of the mounting rod 29 is located in the mounting hole 27, and the mounting of the rubber block 24 is completed.

As shown in fig. 6 and 7, a tensioning mechanism 30 is further arranged on the test box main body 1, the tensioning mechanism 30 includes a tensioning sprocket 31 and a tensioning plate 32, the tensioning plate 32 is in sliding fit with the side wall of the test box main body 1, a dovetail groove 33 is arranged on the test box main body 1, the tensioning plate 32 is provided with a dovetail strip 35 through a connecting block 34, the dovetail strip 35 is in sliding fit with the dovetail groove 33, the tensioning plate 32 is fastened with the test box main body 1 through two screws, six threaded holes are arranged at the bottom of the dovetail groove 33, the two screws sequentially penetrate through the tensioning plate 32, the connecting block 34 and the dovetail strip 35 and are screwed in the threaded holes, the tensioning sprocket 31 is rotatably connected to the tensioning plate 32, a tensioning shaft 36 is rotatably connected to the tensioning plate 32, the tensioning sprocket 31 is arranged on the tensioning shaft 36, and the tensioning sprocket 31 is meshed with.

When the chain 10 is loosened, the screw for fixing the tension plate 32 is detached, the tension plate 32 is moved to enable the tension plate 32 to face the direction close to the ground to a certain degree, the tension sprocket 31 moves along with the tension plate 32, the tension sprocket 31 re-tensions the chain 10, and the position of the tension plate 32 is fixed through the screw, so that the tension sprocket 31 is prevented from moving, and the purpose of tensioning the chain 10 is achieved.

As shown in fig. 1 and 8, the protective shell 3 is detachably connected with the test box main body 1, the protective shell 3 comprises a transmission protective shell 37 and a driving protective shell 38, the transmission protective shell 37 is arranged on the test box main body 1 through screws, the driving protective shell 38 is arranged on the test box main body 1 through screws, as shown in fig. 1 and 2, the transmission protective shell 37 is used for shielding the transmission mechanism 6, the driving protective shell 38 is used for shielding the driving device 7, a sliding opening 39 is arranged on the protective shell 3, and the horizontal rod 20 of the movable rod 5 penetrates through the sliding opening 39.

The implementation process comprises the following steps: when the sample is detected in the observation box, the motor 14 is started, the motor 14 drives the driving sprocket 8 to rotate, so that the chain 10 is driven to rotate, the chain 10 drives the movable block 11 to move, the movable block 11 drives the movable brush 4 to move through the movable rod 5, the movable brush 4 removes the water mist on the box cover 2, so that the change condition of the surface of the sample can be directly observed through the box cover 2, and convenience is brought for observing the sample.

When the protective shell 3 needs to be disassembled, the screws for connecting the horizontal rod 20 and the vertical rod 21 are disassembled, the vertical rod 21 is disassembled, the screws for fixing the transmission protective shell 37 and the driving protective shell 38 are disassembled, the limit of the transmission protective shell 37 and the limit of the driving protective shell 38 are removed, and the disassembly of the protective shell 3 is completed.

When installing protecting crust 3, install transmission protecting crust 37 on the test case main part 1 lateral wall through the screw earlier, and make horizontal rod 20 run through the mouth 39 that slides, rethread screw will drive protecting crust 38 and install on test case main part 1, and the both ends of drive protecting crust 38 touch with the tip of transmission protecting crust 37, form complete protecting crust 3.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. The utility model provides a salt fog test box, includes test box main part (1) and case lid (2), case lid (2) set up on test box main part (1), its characterized in that: the demisting device comprises a movable brush (4), a movable rod (5), a transmission mechanism (6) and a driving device (7), wherein the transmission mechanism (6) comprises a driving chain wheel (8), a driven chain wheel (9), a chain (10) and a movable block (11), the driving chain wheel (8) and the driven chain wheel (9) are respectively rotatably connected with the side wall of the test box main body (1), the driving device (7) is arranged on the test box main body (1) and is linked with the driving chain wheel (8), the chain (10) is sleeved on the driving chain wheel (8) and the driven chain wheel (9) and is tensioned by the driving chain wheel (8) and the driven chain wheel (9), the movable block (11) is arranged on the chain (10), one end of the movable rod (5) is connected with the movable block (11), the other end of the movable brush (4) is connected, and the movable brush (4) is abutted against the case cover (2).

2. The salt fog test chamber of claim 1, wherein: the two groups of transmission mechanisms (6) are arranged, and the two groups of transmission mechanisms (6) are respectively arranged on two opposite side walls of the test box main body (1).

3. The salt fog test chamber of claim 2, wherein: the two groups of transmission mechanisms (6) share one driving device (7), the driving device (7) comprises a motor (14), a first bevel gear (15), a second bevel gear (16) and a transmission shaft (17), the motor (14) is arranged on the test box main body (1), the first bevel gear (15) is arranged on the motor (14), two ends of the transmission shaft (17) are linked with driving chain wheels (8) of the two groups of transmission mechanisms (6), the second bevel gear (16) is arranged on the transmission shaft (17), and the first bevel gear (15) is meshed with the second bevel gear (16).

4. The salt fog test chamber of claim 1, wherein: still be equipped with straining device (30) on experimental case main part (1), straining device (30) are including tensioning sprocket (31) and tensioning plate (32), tensioning plate (32) and experimental case main part (1) lateral wall sliding fit, pass through the screw fastening between tensioning plate (32) and experimental case main part (1), tensioning sprocket (31) rotate to be connected in tensioning plate (32), and tensioning sprocket (31) and chain (10) meshing and with chain (10) tensioning.

5. The salt fog test chamber of claim 4, wherein: be equipped with dovetail (33) on test box main part (1), be equipped with dovetail (35) on tensioning plate (32), dovetail (35) and dovetail (33) sliding fit.

6. The salt fog test chamber of claim 1, wherein: be equipped with protecting crust (3) that are used for sheltering from drive mechanism (6) and drive arrangement (7) on test box main part (1), just be equipped with on protecting crust (3) and slide mouth (39), carriage release lever (5) run through and slide mouth (39).

7. The salt fog test chamber of claim 6, wherein: the protective shell (3) is detachably connected with the test box main body (1).

8. The salt fog test chamber of claim 1, wherein: the movable brush (4) comprises a movable plate (23) and a rubber block (24), the movable plate (23) is connected with the movable rod (5), the rubber block (24) is arranged on the movable plate (23), and the rubber block (24) is abutted to the box cover (2).

9. The salt fog test chamber of claim 8, wherein: the rubber block (24) is detachably connected with the moving plate (23).

10. The salt fog test chamber of claim 8, wherein: be equipped with recess (25) and through-hole (26) on movable plate (23), be equipped with mounting hole (27) on block rubber (24), be equipped with spring (28) in mounting hole (27), be connected with installation pole (29) on spring (28), block rubber (24) are in recess (25), when spring (28) are in natural state, the one end that installation pole (29) deviate from spring (28) is in through-hole (26).