Large sand dust test box

Abstract

The utility model discloses a large-scale sand dust test box which comprises a circulating pipeline, a test section is arranged in the circulating pipeline, a sample rotating table used for adjusting the sand dust receiving angle of a sample is arranged in the middle of the test section, the circulating pipeline is connected end to end, and a circulating fan and an exhaust inlet are arranged at the joint of the circulating pipeline. The circulating fan and the air suction opening are matched to control the air speed in the circulating pipeline, a sand and dust adding device is arranged on the circulating pipeline, and the sand and dust adding device conveys sand particles and dust particles of different sizes into the circulating pipeline. The device is used for simulating the dynamic change of a real sand storm so as to test the sealing performance of a sample from multiple angles. According to the utility model, through the circulating pipeline system, the sample rotating table with the adjustable angle, accurate wind speed control and real particle distribution simulation, the sealing performance of the sample is tested at multiple angles, and the dynamic change of a sand storm is simulated more truly, so that the sand dust test which is more strict and close to the reality is carried out on the sample.

Description

Technical Field

[0001] The utility model relates to the technical field of detection tools, and more specifically to a large sand and dust test box. Background Art

[0002] The scientific name of the sand and dust test chamber is "sand and dust test chamber". It simulates the destructiveness of natural wind and sand climate on products. It is suitable for testing the shell sealing performance of products. It is mainly used for the tests of IP5X and IP6X specified in the shell protection level standard. It mainly simulates the damage caused by sandstorm weather to locks, automobile and motorcycle parts, seals, power meters and other products. It is suitable for electrical and electronic products, automobile and motorcycle parts, and seals in sand and dust environments to prevent sand and dust from entering the seals and shells, so as to test the performance of electronic and electrical products, automobile and motorcycle parts, and seals in the use, storage, and transportation of sand and dust environments.

[0003] Existing component testing is becoming more and more stringent, with requirements that are closer to daily usage effects. For example, more components are installed in desert environments with good lighting. The damage and impact of wind and sand on the components require testing in a laboratory to simulate such an environment in order to discover product defects early and make targeted improvements.

[0004] After searching, a dust-proof experimental device with patent number CN218766054U has the following problems: it uses a spray head to spray dust on the product to simulate a sandstorm environment. However, the dust sprayed by the spray head is uniform, and the spray range and spray angle of the spray head are usually fixed, and the spray volume of the spray head is limited, which cannot simulate the dynamic changes of sandstorms and the size and distribution of dust particles in sandstorms. Utility Model Content

[0005] In order to overcome the problems in the existing dust prevention experimental device technology that the dust sprayed by the nozzle is uniform, the spray range and spray angle of the nozzle are usually fixed, and the spray volume of the nozzle is limited, and the dynamic changes of sandstorms and the size and distribution of dust particles in sandstorms cannot be simulated, the utility model provides a large sand and dust test box.

[0006] The technical solution of the utility model is as follows:

[0007] A large-scale sand and dust test box comprises a circulation duct, a test section is provided in the circulation duct, a sample rotating table for adjusting the angle of the sample affected by sand and dust is provided in the middle of the test section, the circulation duct is connected end to end, a circulation fan and an air suction port are provided at the connection of the circulation duct, the circulation fan and the air suction port cooperate to control the wind speed in the circulation duct, a sand and dust adding device is provided on the circulation duct, the sand and dust adding device respectively conveys sand particles and dust particles of different sizes into the circulation duct, so as to simulate the dynamic changes of a real sandstorm to test the sealing of the sample from multiple angles.

[0008] According to the utility model of the above scheme, the test section includes a box body, a test chamber is arranged in the box body, the sample rotating table is arranged in the test chamber, and a test chamber door corresponding to the test chamber is arranged on the box body.

[0009] According to the utility model of the above scheme, the circulation pipeline is provided with a heater and a refrigeration unit in sequence, the heater is used to heat the circulation pipeline, and the refrigeration unit is used to cool and dehumidify the circulation pipeline.

[0010] According to the utility model of the above scheme, a control panel is provided outside the circulation pipeline, and the control panel is respectively connected to the heater, the refrigeration unit, the circulation fan, the sand and dust adding device and the sample rotating table.

[0011] According to the utility model of the above scheme, a temperature sensor, a humidity sensor, a wind speed sensor and a sand and dust concentration sensor are provided in the test chamber, and the temperature sensor, the humidity sensor, the wind speed sensor and the sand and dust concentration sensor are all connected to the control panel, and are used to control the temperature, humidity, wind speed and sand and dust concentration in the test chamber to simulate the dynamic changes of a real sandstorm.

[0012] Furthermore, a power distribution cabinet is provided outside the circulation pipeline for supplying power to the control panel and the test chamber.

[0013] Furthermore, the circulation duct is provided with a pneumatic damper at the front end of the test chamber, which is used to change the inner wall width of the circulation duct to change the wind speed.

[0014] Furthermore, an industrial dust collector is provided outside the circulation duct, which is used to cooperate with the circulation fan to remove dust from the inside of the circulation duct after the sand and dust test is completed.

[0015] Furthermore, the circulation pipeline is surrounded by an outer decorative frame.

[0016] Furthermore, a balancing window is provided on the circulation pipeline for balancing the air pressure inside the circulation pipeline.

[0017] The utility model according to the above scheme has the beneficial effect that a sample rotating table for adjusting the angle of the sample exposed to sand and dust is provided in the middle of the test section of the utility model. The setting of the sample rotating table not only enables the sample to be eroded by sand and dust at multiple angles, but also can simulate the different wind angles of the sample in a sandstorm, thereby more comprehensively evaluating the performance of the sample; a circulating fan and an air suction port are provided at the connection of the circulation duct, and the circulating fan and the air suction port cooperate to control the wind speed in the circulation duct, ensuring that the sand and dust particles can circulate continuously in the test box, thereby simulating the continuous flow state of the particles in the sandstorm, and by adjusting the working state of the circulating fan and the air suction port, the wind speed in the duct can be accurately controlled, thereby simulating sandstorm weather of different levels; the sand and dust adding device respectively transports sand particles and dust particles of different sizes into the circulation duct, and by accurately controlling the amount of sand and dust added and the size distribution of the particles, the dynamic changes of the particles in a real sandstorm can be simulated, thereby more accurately evaluating the performance of the product in an actual sandstorm environment. Through the circulation pipe system, the angle-adjustable sample rotating table, precise wind speed control and realistic particle distribution simulation, the sealing of the samples can be tested from multiple angles, and the dynamic changes of sandstorms can be simulated more realistically, so that the samples can be subjected to more rigorous and realistic sand and dust tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is a top view of the utility model;

[0020] Figure 3 It is a front view of the utility model;

[0021] Figure 4 It is a left view of the utility model.

[0022] In the drawings, the reference numerals are as follows:

[0023] 1. Circulation pipeline; 11. Sand and dust adding device; 12. Heater; 13. Refrigeration unit; 14. Control panel; 15. Power distribution cabinet; 16. Pneumatic damper; 17. Balance window;

[0024] 2. Test section; 21. Box; 211. Test chamber; 212. Test chamber door; 213. Sample rotating table; 214. Sand and dust collecting funnel;

[0025] 3. Circulation fan; 4. Air intake; 5. Industrial dust collector; 6. External decorative frame;. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present utility model are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. Terms such as "setting" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "back", "bottom", etc. are based on the directions or positions shown in the drawings, which are only for the convenience of description and cannot be understood as limitations on the present technical solution.

[0028] like Figure 1-Figure 4 As shown, this embodiment provides a large-scale sand and dust test chamber, which tests the sealing of samples from multiple angles through a circulating pipe system, an angle-adjustable sample rotating table 213, precise wind speed control, and realistic particle distribution simulation, and more realistically simulates the dynamic changes of sandstorms, thereby performing more rigorous and realistic sand and dust tests on samples.

[0029] Specifically, the large-scale sand and dust test box includes a circulation pipe 1, a test section 2 is provided in the circulation pipe 1, and a sample rotating table 213 for adjusting the angle of the sample to be exposed to sand and dust is provided in the middle of the test section 2. The setting of the sample rotating table 213 not only enables the sample to be exposed to sand and dust at multiple angles, but also can simulate the different wind angles of the sample in the sand and dust storm, so as to more comprehensively evaluate the performance of the sample. The circulation pipe 1 is connected end to end, and a circulation fan 3 and an air suction port 4 are provided at the connection of the circulation pipe 1. The circulation fan 3 and the air suction port 4 cooperate to control the wind speed in the circulation pipe 1, ensuring that the sand and dust particles can circulate continuously in the test box, thereby simulating the continuous flow state of the particles in the sand and dust storm. By adjusting the working state of the circulation fan 3 and the air suction port 4, the wind speed in the pipe can be accurately controlled, thereby simulating sand and dust storm weather of different levels. In order to more realistically simulate the particle distribution in a sandstorm, a sand and dust adding device 11 is provided on the circulation pipe 1. The sand and dust adding device 11 respectively transports sand particles and dust particles of different sizes into the circulation pipe 1. By precisely controlling the amount of sand and dust added and the size distribution of the particles, the dynamic changes of the particles in a real sandstorm can be simulated, thereby more accurately evaluating the performance of the product in an actual sandstorm environment.

[0030] like Figure 1 and Figure 4 As shown, in one embodiment, the test section 2 includes a box 21, a test chamber 211 is provided in the box 21, a sample rotating table 213 is provided in the test chamber 211, and a test chamber door 212 corresponding to the test chamber 211 is provided on the box 21, and the test chamber door 212 can open and close the test chamber 211 and replace the test sample. Preferably, a sand and dust collection funnel 214 is provided below the sample rotating table 213, which is used to collect sand and dust retained on the sample rotating table 213 to prevent the sand and dust retained on the sample rotating table 213 from damaging the test sample.

[0031] like Figure 2 As shown, in one embodiment, the circulation pipe 1 is not only responsible for the circulation of sand and dust particles, but also bears the important task of simulating the temperature and humidity changes in the sandstorm. Therefore. The circulation pipe 1 is provided with a heater 12 and a refrigeration unit 13 in sequence. The function of the heater 12 is to provide heat for the air in the circulation pipe 1 to simulate the high temperature environment in the sandstorm. The function of the refrigeration unit 13 is to reduce the temperature in the pipe and remove moisture from the air at the same time to simulate the low temperature and dry environment in the sandstorm. The test chamber can accurately simulate the temperature and humidity changes in the sandstorm according to different test requirements.

[0032] like Figure 1 and Figure 3As shown, a control panel 14 is provided outside the circulation pipeline 1, and the control panel 14 is respectively connected to the heater 12, the refrigeration unit 13, the circulation fan, the sand and dust adding device 11 and the sample rotating table 213. Through the control panel 14, the operator can easily adjust various parameters in the test box, such as temperature, humidity, wind speed and sand and dust concentration, so as to achieve a comprehensive simulation of the sandstorm environment.

[0033] The test chamber 211 is provided with a plurality of sensors, including a temperature sensor, a humidity sensor, a wind speed sensor, and a dust concentration sensor, which are all connected to the control panel 14 to monitor the environmental conditions in the test chamber 211 in real time and transmit the data to the control panel 14. The control panel 14 automatically adjusts the working states of the heater 12, the refrigeration unit 13, the circulating fan and other equipment according to the received data to keep the environmental conditions in the test chamber 211 stable within the set range.

[0034] Specifically, the control panel 14 is provided with a controller, an over-temperature protector, a cumulative time display and an emergency stop button; the controller is used to receive and process signals from various sensors, and automatically control the power distribution cabinet 15 according to the preset program and control logic. The controller uses an intelligent control chip such as a microprocessor or a programmable logic controller (PLC); the over-temperature protector includes a temperature sensor and an alarm. When the temperature inside the power distribution cabinet 15 exceeds the preset safety range, the over-temperature protector triggers an alarm to remind the operator to deal with it in time; to prevent safety accidents such as damage or fire caused by overheating of the equipment; the cumulative time display is a device in the power distribution cabinet 15 for recording the running time of the equipment. The cumulative time display includes a timer or a liquid crystal display. Through the cumulative time display, the operator can understand the running time of the sand and dust test box. The emergency stop button is designed with a large red button, which is easy to find and press quickly in an emergency, so as to quickly stop the operation of the equipment. When encountering an emergency or needing to stop the sand and dust test box immediately, the operator presses the emergency stop button to trigger the emergency stop function, so that the equipment stops running quickly.

[0035] like Figure 2 As shown, in one embodiment, a power distribution cabinet 15 is further provided outside the circulation pipeline 1, which is used to supply power to the control panel 14 and the test chamber 211. In this embodiment, the inside of the power distribution cabinet 15 is an electrical control system for the entire device. Specifically, a main power switch is provided on the front face of the power distribution cabinet 15, and the main power switch is used to control the power on and off of the entire power distribution cabinet 15. The main power switch adopts a mechanical switch or a solid-state switch, and has overload protection and short-circuit protection functions to ensure the normal operation of the power distribution cabinet 15.

[0036] like Figure 2As shown, in one embodiment, the circulation duct 1 is provided with a pneumatic damper 16 at the front end of the test chamber 211, and the wind speed is precisely controlled by changing the inner wall width of the circulation duct 1. Specifically, by adjusting the opening of the pneumatic damper 16, the flow area of ​​the circulation duct 1 at the pneumatic damper 16 is dynamically adjusted, thereby affecting the wind speed. The pneumatic damper 16 is connected to the control panel 14, and is controlled by a highly sensitive pneumatic element, so that it can quickly respond to operating instructions and achieve instant adjustment of the wind speed. Preferably, the pneumatic damper 16 is arranged behind the sand and dust adding device 11, and can serve as an entrance for sand and dust particles to enter the test box. By controlling the opening and closing state of the damper, the sand and dust particles can enter and exit the circulation duct 1.

[0037] like Figure 2 As shown, in one embodiment, an industrial dust collector 5 is further provided outside the circulation duct 1, which is used to cooperate with the circulation fan 3 to remove dust from the inside of the circulation duct 1 after the sand and dust test is completed. The industrial dust collector 5 has a strong suction force and airflow control device, which can guide the air in the circulation duct 1 to flow along a specific path, ensuring that the sand and dust in all areas can be effectively removed.

[0038] like Figure 1 and Figure 2 As shown, in one embodiment, the outer periphery of the circulation pipe 1 is provided with an outer decorative frame 6, which not only serves to decorate the circulation pipe 1, but also provides convenience for operation and maintenance. Preferably, the outer decorative frame 6 is made of a heat-insulating material. By using a special heat-insulating material, the outer decorative frame 6 can effectively reduce the heat exchange between the inside of the test box and the external environment, thereby better maintaining the temperature stability in the test box.

[0039] In one embodiment, a balancing window 17 is provided on the circulation pipeline 1 to balance the air pressure inside the circulation pipeline 1. The design principle of the balancing window 17 is to use the air pressure difference to balance the pressure in the pipeline. When the air pressure in the pipeline changes, the balancing window 17 will automatically adjust its opening to adapt to the change in external air pressure. This automatic adjustment function can effectively reduce the internal and external pressure difference and avoid adverse effects on the test chamber due to pressure fluctuations.

[0040] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model.

[0041] The above is an exemplary description of the utility model patent in conjunction with the accompanying drawings. It is obvious that the implementation of the utility model patent is not limited to the above-mentioned method. As long as various improvements are made by adopting the method concept and technical solution of the utility model patent, or the concept and technical solution of the utility model patent are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A large dust test box, characterized in that: The utility model comprises a circulation pipeline, wherein a test section is provided in the circulation pipeline, wherein a sample rotating platform for adjusting the angle of the sample exposed to sand and dust is provided in the middle of the test section, wherein the circulation pipeline is connected end to end, and a circulation fan and an air suction port are provided at the connection of the circulation pipeline, wherein the circulation fan and the air suction port cooperate to control the wind speed in the circulation pipeline, and a sand adding and dust adding device is provided on the circulation pipeline, wherein the sand adding and dust adding device respectively conveys sand particles and dust particles of different sizes into the circulation pipeline, so as to simulate the dynamic changes of a real sandstorm and test the sealing performance of the sample from multiple angles.

2. A large dust test box according to claim 1, characterized in that: The test section comprises a box body, a test chamber is arranged in the box body, the sample rotating table is arranged in the test chamber, and a test chamber door corresponding to the test chamber is arranged on the box body.

3. A large dust test box according to claim 2, characterized in that: The circulation pipeline is provided with a heater and a refrigeration unit in sequence. The heater is used to provide heat for the air in the circulation pipeline, and the refrigeration unit is used to cool and dehumidify the circulation pipeline.

4. A large dust test box according to claim 3, characterized in that: A control panel is arranged outside the circulation pipeline, and the control panel is respectively connected with the heater, the refrigeration unit, the circulation fan, the sand and dust adding device and the sample rotating table.

5. A large dust test box according to claim 4, characterized in that: A temperature sensor, a humidity sensor, a wind speed sensor and a dust concentration sensor are provided in the test chamber. The temperature sensor, the humidity sensor, the wind speed sensor and the dust concentration sensor are all connected to the control panel and are used to control the temperature, humidity, wind speed and dust concentration in the test chamber to simulate the dynamic changes of a real sandstorm.

6. A large dust test box according to claim 4, characterized in that: A power distribution cabinet is also provided outside the circulation pipeline for supplying power to the control panel and the test chamber.

7. A large dust test box according to claim 2, characterized in that: The circulation duct is provided with a pneumatic damper at the front end of the test chamber, which is used to change the inner wall width of the circulation duct to change the wind speed.

8. A large dust test box according to claim 1, characterized in that: An industrial dust collector is also provided outside the circulation pipeline, which is used to cooperate with the circulation fan to remove dust from the inside of the circulation pipeline after the sand and dust test is completed.

9. A large dust test box according to claim 1, characterized in that: The outer periphery of the circulation pipeline is provided with an outer decorative frame.

10. A large dust test box according to claim 1, characterized in that: The circulation pipeline is provided with a balance window for balancing the air pressure inside the circulation pipeline.

Images