Dustproof test box

Abstract

The invention discloses a dustproof test box, and relates to the technical field of dustproof tests. The dustproof test box comprises a box body, a sample holder arranged in the box body, a nozzle arranged in the box body, a powder circulating device connected to the nozzle and a powder mixing device connected to the powder circulating device, the powder mixing device comprises a conveying line, a plurality of storage boxes, a mixing box, an extraction assembly and a material mixing assembly, the storage boxes are arranged on the conveying line, and the extraction assembly and the material mixing assembly are both installed on the mixing box. According to the invention, a dust-containing environment in which a plurality of powders are mixed can be simulated so as to carry out targeted tests.

Description

Technical Field

[0001] This application relates to the technical field of dustproof testing, and in particular to a dustproof testing chamber. Background Technology

[0002] In the fields of electronics, automotive parts, and aerospace, products often face dusty environments during actual use. Dust intrusion can easily lead to problems such as short circuits in the internal circuits of motors, wear and tear on mechanical parts, and decreased sealing performance. This can seriously affect the product's service life and reliability. Therefore, it is necessary to conduct performance tests by simulating different dust environments in dustproof test chambers during the product research and development and production stages.

[0003] The existing dustproof test chamber mainly consists of a chamber body, a dust generating device, an airflow circulation device, a sample rack, and a control system. Its working principle is to send test dust into the chamber through the dust generating device, and use the airflow circulation device to make the dust evenly distributed in the chamber to achieve the set dust concentration environment, thereby testing the products on the sample rack, such as motors.

[0004] Existing test chambers are single-channel structures, generally only capable of conveying and releasing a single type of powder. They cannot simulate dusty environments with mixed powders for targeted testing. Products such as motors typically face complex dusty environments during actual use. The dust in these environments is often a mixture of different types of powders, such as metal and non-metal powders in industrial dust, and sand and pollen particles in outdoor environments. The mixing ratio and particle characteristics of different powders directly affect the degree of dust intrusion and damage to the product. Summary of the Invention

[0005] In order to simulate a dusty environment with a mixture of various powders for targeted testing, this application provides a dustproof test chamber.

[0006] The dustproof test chamber provided in this application adopts the following technical solution: A dustproof test chamber includes a chamber body, a sample rack disposed inside the chamber body, a nozzle disposed inside the chamber body, a powder circulation device connected to the nozzle, and a powder mixing device connected to the powder circulation device. The powder mixing device includes a conveyor line, multiple storage boxes, a mixing chamber, an extraction component, and a mixing component. The multiple storage boxes are located on the conveyor line, and the extraction component and the mixing component are both installed in the mixing chamber.

[0007] By adopting the above technical solution, different types of powders are pre-placed in multiple storage boxes. Then, a conveyor line is driven to move one of the storage boxes to the extraction component. The extraction component extracts the powder from the storage box into a mixing chamber. Repeating this process allows for the extraction of various powder types into the mixing chamber. A mixing component then thoroughly mixes the powders. After placing the product on a sample rack, a powder circulation device extracts the mixed powders into a nozzle to create a dusty environment within the chamber for testing. This application can simulate a dusty environment containing various powder mixtures for targeted testing.

[0008] Preferably, the extraction assembly includes a frame, a reciprocating drive unit disposed on the frame, and a suction pipe connected to the reciprocating drive unit. One end of the suction pipe extends into the mixing chamber, and the suction pipe is equipped with a first suction component and a first on / off valve.

[0009] By adopting the above technical solution, after the first opening and closing valve is driven to open the suction pipe, the reciprocating drive component is driven to drive the suction pipe into the powder inside the storage box, and the first suction component is driven to suck the powder into the mixing box.

[0010] Preferably, the suction pipe is also equipped with a powder quantity detection device.

[0011] By adopting the above technical solution, the amount of powder extracted into the mixing chamber can be roughly estimated based on the detection data of the component detection device. This enables the mixing of various types of powders in different proportions, thereby meeting the requirements of more test scenarios.

[0012] Preferably, the mixing assembly includes a mixing slurry disposed in a mixing tank and a drive component connected to the mixing slurry.

[0013] By adopting the above technical solution, the mixing component can be driven to rotate the mixing slurry, which can make the various powders in the mixing box evenly mixed.

[0014] Preferably, the conveyor line includes a circular conveyor belt, on which a mounting platform is provided for each storage box, and each storage box can be detachably installed on the corresponding mounting platform; the circular conveyor belt is also connected to a sealing member capable of sealing multiple storage boxes, and the sealing member has at least one communication port.

[0015] By adopting the above technical solution, the storage box can be removed to place or replace the powder. Under the action of the sealing component, when the annular conveyor belt drives multiple storage boxes to rotate, the powder is difficult to disperse.

[0016] Preferably, the storage box has a locking block at the bottom, the mounting platform has a locking groove, and the locking block is locked in the locking groove; the wall of the locking groove also has an installation groove, the installation groove is slidably connected to a clamping block, and the clamping block and the installation groove are connected together to a clamping spring.

[0017] By adopting the above technical solution, the clamping block can clamp the card block in the card slot under the action of the clamping spring.

[0018] Preferably, the powder circulation device includes a feed pipe connected to the bottom of the mixing chamber, the feed pipe is equipped with a second on / off valve and a second suction component, and the end of the feed pipe away from the mixing chamber is connected to a nozzle; the powder circulation device also includes a discharge assembly, which is used to discharge the powder in the chamber into a storage box.

[0019] By adopting the above technical solution, the mixed powder is drawn into the nozzle by the second suction component to create a test environment. After the test, the powder in the box will be discharged into the storage box by the discharge component for subsequent reuse.

[0020] Preferably, the discharge assembly includes a discharge hopper connected to the housing, a pipe connected to the discharge hopper, and a vibrating element installed in the discharge hopper. The pipe is equipped with a third suction element and a third on / off valve.

[0021] By adopting the above technical solution, the dust in the box will fall into the discharge funnel under the action of gravity, and then be discharged through the pipe with the help of the third suction component. The vibrating component can prevent the dust from accumulating in the box and making it difficult to fall.

[0022] Preferably, the housing is also equipped with a temperature detection element and a powder concentration detection element.

[0023] Preferably, each storage box has a through vent hole, and a filter is installed in the vent hole.

[0024] By adopting the above technical solution, the filter element can allow air to pass through but block powder from passing through.

[0025] In summary, the present invention has at least one of the following beneficial technical effects: 1. In this application, different types of powders are first placed in multiple storage boxes. Then, a conveyor line is driven to move one of the storage boxes to the extraction component. The extraction component extracts the powder from the storage box into a mixing chamber. Repeating this process allows multiple different types of powders to be extracted into the mixing chamber. A mixing component then mixes the powders evenly. After the product is placed on a sample rack, a powder circulation device extracts the mixed powders into a nozzle to create a dusty environment within the chamber for testing. This application can simulate a dusty environment of mixed powders for targeted testing. 2. Based on the detection data of the component detection device, the amount of powder extracted into the mixing chamber can be roughly estimated, which can realize the mixing of various types of powders in different proportions to meet the requirements of more test scenarios; 3. The mixed powder is drawn into the nozzle by the second suction component to create the test environment. After the test, the powder in the box will be discharged into the storage box by the discharge component for subsequent reuse. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of a dustproof test chamber according to an embodiment of this application; Figure 2 This is a cross-sectional view of a dustproof test chamber; Figure 3 This is a structural diagram used to illustrate the conveyor line; Figure 4 yes Figure 1 Enlarged view of section A; Figure 5 This is a cross-sectional view used to illustrate the storage box; Figure 6 It is a cross-sectional view used to illustrate the mixing components; Figure 7 yes Figure 2 Enlarged view of section B.

[0027] In the attached diagram, the following are labeled: 1. Box body; 11. Sample rack; 12. Nozzle; 13. Connection hole; 2. Powder circulation device; 21. Feed pipe; 22. Second on / off valve; 23. Second suction component; 24. Discharge assembly; 241. Drop funnel; 242. Pipe body; 243. Vibrating component; 244. Third suction component; 245. Third on / off valve; 246. Fourth on / off valve; 3. Powder mixing device; 31. Conveyor line; 311. Circular conveyor belt; 312. Mounting platform; 3121. Slot; 3122. Mounting groove ; 3123, clamping block; 3124, clamping spring; 313, sealing component; 3131, powder outlet; 3132, powder inlet; 32, storage box; 321, vent; 322, filter element; 323, locking block; 33, mixing box; 34, extraction assembly; 341, frame; 342, reciprocating drive component; 343, suction pipe; 3431, flexible hose section; 3432, rigid pipe section; 344, first suction component; 345, first on / off valve; 35, mixing assembly; 351, mixing slurry; 352, drive component. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings.

[0029] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0030] This application discloses a dustproof test chamber. It is used to simulate dusty environments with different types and proportions of powder to conduct targeted tests.

[0031] Reference Figure 1 and Figure 2A dustproof test chamber includes a chamber body 1 with a door, a sample rack 11 located on the inner side wall of the chamber body 1, a nozzle 12 located at the top of the chamber body 1, a powder circulation device 2 connected to the nozzle 12, and a powder mixing device 3 connected to the powder circulation device 2. The sample rack 1 is hollow, and its specific design depends on the type of product being tested. For example, if the product is a motor, the sample rack 11 is a motor bracket, and the motor can be directly connected to the motor bracket with screws during use. For other types of products, the sample rack 11 may also be a clamp, clamp, rope, or hook. The nozzle 12 is a high-pressure nozzle, which sprays powder onto the product to wash its surface, thereby testing the product's dustproof performance. The high-pressure nozzle also has the ability to disperse dust, ensuring uniform distribution of dust within the chamber body 1 to simulate a dusty environment. The specific structure of the high-pressure nozzle is existing technology and will not be described in detail here.

[0032] Place the product on the sample rack 11 and close the door. Use the powder mixing device 3 to mix various types of powder in different proportions. Use the powder circulation device 2 to draw the mixed powder into the nozzle 12 and spray it out from the nozzle 12 to conduct a dustproof test on the product. After each test, use the powder circulation device 2 to recover the powder for subsequent reuse.

[0033] Reference Figure 1 and Figure 2 The powder mixing device 3 includes a conveyor line 31, multiple storage boxes 32, a mixing box 33, an extraction component 34, and a mixing component 35. The multiple storage boxes 32 are mounted on the conveyor line 31, and the conveyor line 31 can drive the storage boxes 32 to be conveyed around. The extraction component 34 and the mixing component 35 are both installed in the mixing box 33.

[0034] Reference Figure 1 and Figure 3 Specifically, the conveyor line 31 includes an annular conveyor belt 311, such as a sprocket and chain annular conveyor belt or a gear and rack annular conveyor belt. The specific structure of the annular conveyor belt 311 is existing technology and will not be described in detail here. Each storage box 32 is provided with a mounting platform 312 on the annular conveyor belt 311, and each storage box 32 can be detachably mounted on the corresponding mounting platform 312. The annular conveyor belt 311 is also fixedly connected to a sealing member 313 capable of sealing multiple storage boxes 32. The sealing member 313 is used to seal the storage boxes 32 to allow the powder inside to disperse. The sealing member 313 has two connecting ports, combined with... Figure 2 The two connecting ports are powder outlet 3131 and powder inlet 3132, respectively.

[0035] Reference Figure 4The extraction component 34 includes a frame 341 connected to the annular conveyor belt 311, a reciprocating drive 342 mounted on the frame 341, and a suction pipe 343 connected to the reciprocating drive 342. The reciprocating drive 342 is, for example, a cylinder. One end of the suction pipe 343 extends into the mixing chamber 33, and the other end of the suction pipe 343 can pass through the powder outlet 3131 and be inserted into the storage box 32. Figure 4 The lower end of the suction pipe 343 shown is at the lower limit position. The suction pipe 343 includes a flexible hose section 3431 in the middle and rigid pipe sections 3432 at both ends. The rigid pipe section 3432 is equipped with a first suction element 344, a first on / off valve 345 and a check valve. The check valve is installed on the side of the suction pipe 343 near the mixing box 33. The check valve is mainly used to prevent the powder from flowing back into the mixing box 33. The first on / off valve 345 is normally closed. The first suction element 344 is, for example, a high-pressure blower that can generate negative pressure to drive the powder to flow. The first on / off valve 345 is, for example, a gate valve.

[0036] After the powder is pre-placed in the storage box 32, the circular conveyor belt 311 is driven to move the storage box 32 to below the powder outlet 3131. The reciprocating drive 342 is driven to insert the lower end of the suction pipe 343 into the powder in the storage box 32 through the powder outlet 3131. The first opening and closing valve 345 is driven to ensure that the suction pipe 343 is opened. The first suction component 344 is driven to suck the powder in the storage box 32 so that the powder reaches the mixing box 33.

[0037] Reference Figure 5 To facilitate air circulation for the extraction of powder from the storage box, a through-hole 321 is provided on the inner wall of the storage box 32. A filter element 322, such as a breathable membrane filter, is installed in the vent 321. This breathable membrane filter allows air to pass through but blocks powder. Figure 2 The housing 1 has a connection hole 13, and a breathable membrane filter is also installed in the connection hole 13.

[0038] Referring to Figure 6, the mixing assembly 35 includes a mixing slurry 351 disposed in a mixing tank 33 and a drive component 352 connected to the mixing slurry 351, such as a motor.

[0039] The mixing slurry 351 is rotated by driving the drive component 352 to achieve mixing of various powders in the mixing box 33.

[0040] Reference Figure 3 and Figure 4 In order to achieve quantitative extraction of powder from storage box 32 as much as possible, suction pipe 343 is also equipped with powder quantity detection device. The powder quantity detection device can be a weighing dust sensor or a combination of wind speed sensor and dust concentration sensor.

[0041] Reference Figure 5In order to facilitate the loading and unloading of powder by assembling and disassembling the storage box 32, the bottom of the storage box 32 has a locking block 323, and the mounting platform 312 has a locking groove 3121. The locking block 323 is locked in the locking groove 3121. The wall of the locking groove 3121 also has an installation groove 3122. The mounting groove 3122 is slidably connected to the abutment block 3123. The abutment block 3123 and the mounting groove 3122 are connected together to a clamping spring 3124. The end of the abutment block 3123 near the outside has a guide slope, which facilitates the insertion of the locking block 323 into the locking groove 3121.

[0042] Reference Figure 2 The powder circulation device 2 includes a feed pipe 21 connected to the bottom of the mixing box 33. The bottom of the mixing box 33 is funnel-shaped. The feed pipe 21 is equipped with a second on / off valve 22 and a second suction component 23. The second on / off valve 22 is a gate valve and is normally closed. The second suction component 23 is a high-pressure blower. The end of the feed pipe 21 away from the body 1 of the mixing box 33 is connected to a nozzle 12.

[0043] After the various powders are mixed in the mixing chamber 33, the second on / off valve 22 is driven to open the feed pipe 21, and the second suction component 23 is driven to carry the powder in the mixing chamber 33 through the feed pipe 21 to the nozzle 12 for spraying out to conduct the test.

[0044] Reference Figure 7 and combined Figure 2 The powder circulation device 2 also includes a discharge assembly 24, which is used to discharge the powder in the housing 1 into the storage box 32. The discharge assembly 24 includes a discharge funnel 241 connected to the housing 1, a pipe 242 connected to the discharge funnel 241, and a vibrating element 243 installed in the discharge funnel 241. The vibrating element 243 is, for example, a vibrating motor. The pipe 242 is equipped with a third suction element 244 and a third on / off valve 245. The third on / off valve 245 is normally closed. The third suction element 244 is a high-pressure blower, and the third on / off valve 245 is a gate valve. The lower end of the pipe 242 extends into the powder inlet 3132. The powder inlet 3132 is equipped with a normally closed fourth on / off valve 246. The fourth on / off valve 246 is, for example, a ball valve or a gate valve.

[0045] After the test, the third on / off valve 245 is driven to open the pipe 242. The powder will fall into the discharge funnel 241 under the action of gravity and the vibration component 243 and then reach a storage box 32 through the pipe 242. The third suction component 244 is driven to help the powder in the box 1 reach the storage box 32.

[0046] Reference Figure 2In order to ensure that the powder concentration and ambient temperature in the dusty environment inside the chamber 1 can be obtained in real time, the chamber 1 is also equipped with a temperature detection device and a powder concentration detection device. Both the temperature detection device and the powder concentration detection device are sensors, and the specific detection logic and structure are existing technologies, so they will not be described in detail here.

[0047] This application can efficiently test the dustproof capability of a single product in different environments, such as desert, vehicle, and mining scenarios. This application can also test the dustproof level of a single product based on gradually increasing the amount of powder. Of course, testing from single dust to mixed dust also helps in determining dustproof capability.

[0048] This application is also mainly used to screen the type of dust that has the greatest impact on the product. By comparing the results of multiple tests, the type of dust that has the greatest impact on a certain product, such as a certain motor, is determined, and then further tests are conducted by increasing the amount of dust of this type.

[0049] The implementation principle of a dustproof test chamber in this application embodiment is as follows: Place the product on sample rack 11 and close the door; Different types of powder are pre-placed in each storage box 32. First, the circular conveyor belt 311 is driven to move one of its storage boxes 32 to below the powder outlet 3131. The reciprocating drive 342 is driven to drive the lower end of the suction pipe 343 to be inserted into the powder in the storage box 32 through the powder outlet 3131. The first opening and closing valve 345 is driven to ensure that the suction pipe 343 is opened. The first suction component 344 is driven to suck the powder in the storage box 32 so that the powder reaches the mixing box 33. The above actions are repeated to complete the extraction of various types of powder. Ensure that the first opening and closing valve 345 closes the suction pipe 343, ensure that the second opening and closing valve 22 closes the feed pipe 21, and drive the driving component 352 to drive the mixing slurry 351 to rotate so as to achieve the mixing of various powders in the mixing box 33. Drive the second opening and closing valve 22 to open the feed pipe 21, drive the second suction component 23 to make the powder reach the nozzle 12 through the feed pipe 21 and spray it into the box 1 to create a dusty environment for the test. After the test, the third on / off valve 245 is driven to open the pipe 242. The powder will fall into the discharge funnel 241 under the action of gravity and the vibrating component 243 and then reach a storage box 32 through the pipe 242. The third suction component 244 is driven to help the powder in the box 1 reach the storage box 32 for recycling.

[0050] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A dust test chamber characterized by: The application relates to a powder mixing device, which comprises a box body (1), a sample rack (11) arranged in the box body (1), a nozzle (12) arranged in the box body (1), a powder circulating device (2) connected to the nozzle (12) and a powder mixing device (3) connected to the powder circulating device (2). The powder mixing device (3) comprises a conveying line (31), a plurality of storage boxes (32), a mixing box (33), an extraction assembly (34) and a mixing assembly (35), the plurality of storage boxes (32) are arranged on the conveying line (31), and the extraction assembly (34) and the mixing assembly (35) are both mounted on the mixing box (33).

2. A dust test chamber according to claim 1, characterised in that: The extraction assembly (34) comprises a rack body (341), a reciprocating driving element (342) arranged on the rack body (341) and a suction pipe (343) connected to the reciprocating driving element (342), one end of the suction pipe (343) extends into the mixing box (33), and the suction pipe (343) is provided with a first suction element (344) and a first on-off valve (345).

3. A dust test chamber according to claim 2, characterised in that: The suction pipe (343) is also provided with a powder amount detection element.

4. The dust test chamber of claim 1, wherein: The mixing assembly (35) comprises a mixing slurry (351) arranged in the mixing box (33) and a driving rotating element (352) connected to the mixing slurry (351).

5. The dust test chamber of claim 1, wherein: The conveying line (31) comprises a ring-shaped conveying belt (311), and an installation table (312) is arranged on the ring-shaped conveying belt (311) corresponding to each storage box (32); each storage box (32) can be detachably mounted on the corresponding installation table (312); the ring-shaped conveying belt (311) is further connected with a sealing element (313) capable of sealing the plurality of storage boxes (32), and at least one communication opening is formed in the sealing element (313).

6. A dust test chamber according to claim 5, characterised in that: The storage box (32) is provided with a clamping block (323) at the bottom end, the installation table (312) is provided with a clamping groove (3121), and the clamping block (323) is clamped in the clamping groove (3121); an installation groove (3122) is further formed in the wall surface of the clamping groove (3121), a pressing block (3123) is slidably connected to the installation groove (3122), and the pressing block (3123) and the installation groove (3122) are jointly connected with a pressing spring (3124).

7. A dust test chamber according to claim 1, characterized in that: The powder circulating device (2) comprises a material conveying pipe (21) connected to the bottom end of the mixing box (33), the material conveying pipe (21) is provided with a second on-off valve (22) and a second suction element (23), and one end of the material conveying pipe (21) away from the box body (1) is connected to the nozzle (12); the powder circulating device (2) further comprises a discharging assembly (24) for discharging the powder in the box body (1) into the storage box (32).

8. A dust test chamber according to claim 7, characterised in that: The discharging assembly (24) comprises a material falling funnel (241) connected to the box body (1), a pipe body (242) connected to the material falling funnel (241) and a vibrating element (243) mounted on the material falling funnel (241), and the pipe body (242) is provided with a third suction element (244) and a third on-off valve (245).

9. The dust test chamber of claim 1, wherein: The box body (1) is further provided with a temperature detection element and a powder concentration detection element.

10. The dust test chamber of claim 1, wherein: Each storage box (32) is provided with a through air hole (321) which is provided with a filter (322).

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