A dust adhesion test system

Abstract

A dust adhesion test system includes a dust blowing device and a dust adhesion device. The dust blowing device includes a fan and a dust forming mechanism. The dust forming mechanism includes a powder feeding mechanism and a powder blowing part. The powder feeding mechanism is used to form dispersed particulate dust. The powder blowing part is used to blow the dust falling from the powder feeding mechanism to the dust adhesion device. The dust adhesion device includes a sealed cavity, a temperature and humidity detector, a concentration detector, a rotating table and a driving mechanism. The sealed cavity receives the dust blown from the dust blowing device. The rotating table is provided with at least one test piece, and the driving mechanism is used to drive the rotating table to rotate, and the test piece is used to adhere dust. The dust adhesion test system can be applied to coal mining, food processing, ecological environment detection and other fields, and has strong applicability. At the same time, the test system also has the advantages of simple structure, high working efficiency and low cost.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of dust test, and particularly relates to a dust adhesion test system. BACKGROUND

[0002] At present, in daily industrial production and work and life, various dusts are generated in the manufacturing and processing process. Some dusts will adhere to the surface of the machine equipment, and long-term accumulation will affect the reliability of the equipment. For example, in the process of coal mining, most of the coal mines in China are underground mining, and the mine environment is relatively poor. The main features of the mine are: the coal dust concentration of the coal mining face is high, and sometimes it can be as high as 1000 mg / m 3 , that is, a high dust environment. At the same time, the humidity of the coal mine shaft can reach more than 75%, that is, a high humidity environment. In this environment, coal dust is extremely easy to adhere to the surface of the coal mining equipment. For example, in the field of food processing, the cutting and stirring of raw materials in the production process will generate food dust, which is also easy to adhere to the surface of the equipment, is not conducive to cleaning, and will cause a certain degree of impact on the equipment after long-term work. In addition, with the continuous aggravation of atmospheric environmental pollution, a large amount of dust and powder will be generated on some outdoor construction equipment, which will cause great harm to the environment and human health. Of course, it can be thought that it is not limited to the above three scenarios, and there are dust problems in many fields. Therefore, if the adhesion law and the micro mechanism thereof can be studied, important theoretical basis for adhesion suppression of working equipment can be provided, and therefore a system is needed to explore the dust adhesion law. SUMMARY

[0003] Therefore, the present application provides a dust adhesion test system which can meet the above needs.

[0004] A dust adhesion test system comprises a dust blowing device and a dust adhesion device arranged on the air outlet of the dust blowing device. The dust blowing device comprises a fan and a dust forming mechanism arranged on the air outlet of the fan. The dust forming mechanism comprises a powder feeding mechanism and a powder blowing part arranged below the outlet of the powder feeding mechanism. The powder feeding mechanism is used to form dispersed particulate dust. The powder blowing part is used to blow the dust falling from the powder feeding mechanism to the dust adhesion device. The dust adhesion device comprises a sealed cavity, a temperature and humidity detector for detecting the temperature and humidity in the sealed cavity, a concentration detector for detecting the dust concentration in the sealed cavity, a rotating table arranged in the sealed cavity, and a driving mechanism arranged outside the sealed cavity. The sealed cavity receives the dust blown from the dust blowing device. The rotating table is provided with at least one test piece, and the driving mechanism is used to drive the rotating table to rotate, and the test piece is used to adhere dust.

[0005] Further, the powder feeding mechanism comprises a frame, a driver arranged on the frame, a hopper fixed on the frame, and a feeding rod inserted into the hopper and rotating under the driving of the driver, the hopper being used for containing material, and the feeding rod being used for feeding the material into the powder blowing part.

[0006] Further, the hopper comprises a V-shaped part and a straight cylinder part connected with the V-shaped part, the feeding rod being inserted into the straight cylinder part, and the diameter of the feeding rod being equivalent to the diameter of the straight cylinder part.

[0007] Further, the feeding rod is provided with a helical feeding groove, and the material is scattered into the powder blowing part when the feeding rod rotates.

[0008] Further, the powder blowing part comprises a powder discharging cylinder, an air inlet part arranged on the powder discharging cylinder, and an air outlet part arranged on the powder discharging cylinder, the air inlet part being connected with the fan, the air outlet part being connected with the dust adhesion device, and the arrangement direction of the air inlet part and the air outlet part being perpendicular to the powder falling direction of the powder feeding mechanism.

[0009] Further, one end of the powder discharging cylinder is connected with the straight cylinder part.

[0010] Further, the rotating table comprises a main shaft rotatingly arranged on the sealed cavity, and a clamping platform arranged on the main shaft, and at least one test piece is inserted into the clamping platform.

[0011] Further, the clamping platform is provided with a plurality of test pieces, and each test piece is made of different material.

[0012] Further, the driving mechanism comprises a stepping motor arranged on the sealed cavity, and a synchronous belt connecting the stepping motor and the main shaft.

[0013] Further, the dust adhesion device further comprises a humidifying device and / or a drying device, the humidifying device being used for controlling the humidity in the sealed cavity, and the drying device being used for adjusting the dryness in the sealed cavity.

[0014] Compared with existing technologies, the dust adhesion testing system provided by this invention obtains the adhesion of dust on the test piece under certain temperature, humidity, and dust concentration conditions through the dust blowing device and the dust adhesion device. Furthermore, it can use test pieces of different materials to obtain adhesion results for different materials, facilitating subsequent adhesion data processing and simulating dust adhesion under different environments. Specifically, the dust blowing device can manually control multiple parameters to study the patterns of dust adhesion under different factors. For example, by changing the rotational speed of the motor in the dust feeding mechanism, the rotational speed of the dust feeding rod can be changed; or by adjusting the throttle valve located at the air outlet, the speed and duration of dust feeding can be changed, thereby controlling the dust concentration within the sealed cavity. For dust adhesion testing devices, the position of the air inlet on the sealed cavity can be selected to explore the patterns of test results obtained at different positions and angles. The rotation speed of the clamping platform can be changed to test dust adhesion at different speeds. Furthermore, the humidity and dryness within the sealed cavity can be adjusted using humidification and drying devices. Therefore, this dust adhesion testing system has a wide range of applications, including coal mining, food processing, and ecological environment monitoring, and is highly adaptable. At the same time, this testing system is simple in structure, highly efficient, and low in cost. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a dust adhesion testing system provided by the present invention.

[0016] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the powder feeding mechanism in the dust adhesion testing system.

[0017] Figure 3 for Figure 1 A schematic diagram of the rotating stage of the dust adhesion testing system. Detailed Implementation

[0018] The following provides a more detailed description of specific embodiments of the present invention. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the scope of protection of the present invention.

[0019] like Figures 1 to 3 The diagram shown is a structural schematic of a dust adhesion testing system provided by the present invention. The dust adhesion testing system includes a dust blowing device 10 and a dust adhesion device 20 disposed at the air outlet of the dust blowing device 10. It is conceivable that the dust adhesion testing system also includes other functional modules, such as a control module for coordinating the operation of the dust blowing device 10 and the dust adhesion device 20, a data acquisition module, and electrical connection components, etc., which are technologies well known to those skilled in the art and will not be described in detail here.

[0020] The dust blowing device 10 comprises a fan 11, and a dust forming mechanism 12 arranged at the air outlet of the fan 11. The fan 11 is a prior art, and its power and model can be selected according to actual needs, and will not be described in detail here. The dust forming mechanism 12 comprises a powder feeding mechanism 13, and a powder blowing part 14 arranged below the outlet of the powder feeding mechanism 13. The powder feeding mechanism 13 is used to form dispersed dust particles. The powder feeding mechanism 13 comprises a rack 131, a driver 132 arranged on the rack 131, a hopper 133 fixed on the rack 131, and a feeding rod 134 inserted in the hopper 133 and rotating under the driving of the driver 132.

[0021] The rack 131 is used to support the driver 132, the hopper 133, and the feeding rod 134, and its structure is suitable for bearing or assembling the driver 132, the hopper 133, and the feeding rod 134, and will not be described in detail here. The driver 132 can be a stepper motor, which is a prior art. By using the stepper motor, the rotation speed of the feeding rod 134 can be controlled, and the feeding speed of the dust particles or material can be controlled. The hopper 133 is used to hold the material, and comprises a V-shaped part 135, and a straight cylinder part 136 connected with the V-shaped part 135. The V-shaped part 135 can hold the material and automatically and guidedly flow to the straight cylinder part 136 under the action of gravity. The straight cylinder part 136 is arranged at one end of the small diameter of the V-shaped part 135. The feeding rod 134 is inserted into the straight cylinder part 136, and the diameter of the feeding rod 134 is comparable to the diameter of the straight cylinder part 136.

[0022] The feeding rod 134 rotates under the driving of the driver 132, and also comprises a spiral feeding groove 137. When the feeding rod 134 rotates, and because the diameter of the feeding rod 134 is comparable to the diameter of the straight cylinder part 136, the material is clamped between the feeding groove 137 and the straight cylinder part 136, and the part of the feeding rod 134 that is in contact with the straight cylinder part 136 is free of material. Therefore, when the feeding rod 134 rotates, the material in the feeding groove 137 rotates and is scattered into the powder blowing part 14 under the conveying of the spiral feeding groove 137, achieving the purpose of dispersion and scattering, which is conducive to forming the state of dust, and being blown into the dust adhering device 20 by the fan 11.

[0023] The powder blowing part 14 is used to blow the powder falling from the powder feeding mechanism 13 to the dust adhesion device 20, which includes a powder discharging cylinder 141 connected with the straight cylinder part 136 and communicated with the straight cylinder part 136, an air inlet part 142 arranged on the powder discharging cylinder 141, and an air outlet part 143 arranged on the powder discharging cylinder 142. The size of the powder discharging cylinder 141 along the radial direction of the straight cylinder part 136 is greater than the size of the straight cylinder part 136, so that the material can be lifted by the feeding rod 134 and dispersed, instead of falling directly under the action of gravity. Meanwhile, the size of the powder discharging cylinder 141 along the axial direction of the straight cylinder part 136 is not limited, which can be set according to the needs, such as the diameter of the air inlet part 142 or the air outlet part 143. The air inlet part 142 is connected with the fan 11, such as through a ventilation hose. The air outlet part 143 is connected with the dust adhesion device 20, and the arrangement direction of the air inlet part 142 and the air outlet part 143 is perpendicular to the falling direction of the powder feeding mechanism, that is, perpendicular to the axial direction of the feeding rod 134. When the material is lifted to form dust after being sent out of the straight cylinder part 136 by the feeding rod 134, the fan 11 can blow the dust into the dust adhesion device 20. Therefore, in order to improve the efficiency, the free end of the feeding rod 134 is flush with the free end of the straight cylinder part 136 or slightly protrudes from the straight cylinder part 136.

[0024] The dust adhesion device 20 includes a sealed cavity 21, a temperature and humidity detector 22 for detecting the temperature and humidity in the sealed cavity 21, a concentration detector 23 for detecting the dust concentration in the sealed cavity 21, a rotating table 24 arranged in the sealed cavity 21, and a driving mechanism 25 arranged outside the sealed cavity 21. The sealed cavity 21 is used to receive the dust blown from the dust blowing device, and its shape can be designed based on the size of the clamping platform, for example, the overall size of the designed box body is 500mm×500mm×300mm, and the aluminum alloy profile is used to build the load-bearing framework, and the frame and the surrounding acrylic plate are connected by screws. The lower bottom plate of the box body is an aluminum plate with a thickness of 5mm, which aims to reduce the overall weight of the box body, reduce the weight of the box body framework, and increase its stability. Of course, it is conceivable that the shape, size, and structure of the sealed cavity 21 can also be designed according to actual needs. A plurality of interfaces 211 with different diameters can be arranged on the sealed cavity 21. By designing the different positions of the interfaces 211 and the directions of the interfaces 211 entering the sealed cavity 21, different dust adhesion environments such as dust speed, dust incidence angle, and dust concentration can be provided.

[0025] The temperature and humidity detector 22 is used to detect the temperature and humidity in the sealed cavity 21, which is a prior art and is inserted and fixed in the sealed cavity 21. Since the temperature and humidity in the sealed cavity 21 should be uniform in a certain time, the setting position of the temperature and humidity detector 22 is not required, and the model and parameters of the temperature and humidity detector 22 can be selected according to actual needs.

[0026] The concentration detector 23 is used to detect the dust concentration in the sealed cavity 21, which is also a prior art and is inserted and fixed in the sealed cavity 21. The concentration, like the temperature and humidity, should be uniform in a certain time, so the setting position of the concentration detector 23 is also not required.

[0027] The rotating table 24 is rotatably arranged on the sealed cavity 21, so that in order to be rotatable, the rotating table 24 is arranged in the sealed cavity 21 through a bearing. The rotating table 24 includes a main shaft 241 rotatably arranged on the sealed cavity 21, and a clamping platform 242 arranged on the main shaft 241. The main shaft 241 is fixed in the axial direction of the sealed cavity 21 and can rotate around the axial direction, so that one end of the main shaft 241 exposed outside the sealed cavity 21 can be provided with a synchronous pulley (not labeled). The clamping platform 242 is used to clamp at least one test piece 30. The clamping mechanism of the clamping platform 242 can be selected according to actual needs, which will not be described here. The test piece 30 can be one or more, which can be set according to actual needs. Each test piece 30 can be made of different materials, such as 45 steel, aluminum alloy, acrylic, etc., so as to study the rules between different materials and adhesion mechanism. In addition, the main shaft 241 can be rotatable or non-rotatable, so as to study different adhesion environments. When the main shaft 241 rotates, the effect of dust adhesion can also be indirectly controlled, so as to approach the working environment of some equipment.

[0028] The driving mechanism 25 is used to drive the rotating table 24 to rotate, and includes a stepping motor 251 arranged on the sealed cavity 21, and a synchronous belt 252 connecting the stepping motor 251 and the main shaft 241. The stepping motor 251 can be controlled by a single-chip microcomputer to control the rotating speed of the stepping motor 251 and thus the rotating speed of the main shaft 241. It is conceivable that the parameters of the stepping motor 251 can be selected according to actual needs. It is conceivable that the stepping motor 251 has an output end, and a synchronous pulley is arranged on the output end. The synchronous belt 252 is a prior art, which is sleeved on the synchronous pulley of the stepping motor 251 and the synchronous pulley of the main shaft 241, so that when the stepping motor 251 works, the main shaft 241 is driven to rotate.

[0029] It is conceivable that in order to design more dust environment in the sealed cavity 21, the dust adhesion device 20 can also include a humidifying device 26 or a drying device 27, etc. Figure 1 As shown, the humidifying device 26 can include deionized water in a gas washing bottle, connected with the air pump through a throttle valve, and the gas flow of the throttle valve is adjusted to input different humid air into the box. Then the humidity in the sealed cavity 21 is controlled by controlling the throttle valve, and how to control the throttle valve can be completed according to the actual needs. The drying device 27 can include a drying tube and a drying agent arranged in the drying tube. The drying device 27 can also be connected with the air pump through a throttle valve, and the gas flow of the throttle valve is adjusted to input different dry air into the box, so as to control the dryness in the sealed cavity 21.

[0030] Compared with the prior art, the dust adhesion test system provided by the application can obtain the adhesion of dust on the test piece under certain temperature and humidity, and dust concentration, and can also obtain the adhesion of different materials by using test pieces 30 of different materials, so as to facilitate subsequent adhesion data processing, so as to simulate the dust adhesion under different environments. Specifically, the dust blowing device 10 can artificially control multiple parameters to study the law of dust adhesion under different factors, for example, by changing the rotating speed of the motor in the powder feeding mechanism 13 to change the rotating speed of the powder feeding rod 134, or adjusting the throttle valve arranged on the air outlet part 143, so as to change the speed and time of powder feeding, thereby adjusting the dust concentration in the sealed cavity 21. For the dust adhesion device 20, the position of the air inlet hole 211 on the sealed cavity 21 can be selected to explore the law of test results under different positions and angles, the rotating speed of the clamping platform 242 can be changed to test the dust adhesion under different rotating speeds, and the humidity and dryness in the sealed cavity can be adjusted by the humidifying device 26 and the drying device 27, so that the dust adhesion test system has wide application fields, can be applied to coal mining, food processing, ecological environment detection and other fields, and has strong applicability. At the same time, the test system also has simple structure, high working efficiency and low cost.

[0031] The above is only the preferred embodiment of the application, and is not used to limit the protection scope of the application, any modification, equivalent replacement or improvement within the spirit of the application is covered by the claim scope of the application.

Claims

1. A dust adhesion test system characterized by, The dust adhesion testing system comprises a dust blowing device and a dust adhesion device arranged at the air outlet of the dust blowing device, the dust blowing device comprises a fan and a dust forming mechanism arranged at the air outlet of the fan, the dust forming mechanism comprises a powder feeding mechanism and a powder blowing part arranged below the outlet of the powder feeding mechanism, the powder feeding mechanism is used to form dispersed particulate dust, the powder blowing part is used to blow the dust falling from the powder feeding mechanism to the dust adhesion device, the dust adhesion device comprises a sealed cavity, a temperature and humidity detector used to detect the temperature and humidity in the sealed cavity, a concentration detector used to detect the dust concentration in the sealed cavity, a rotating table arranged in the sealed cavity, and a driving mechanism arranged outside the sealed cavity, the sealed cavity receives the dust blown from the dust blowing device, the rotating table is provided with at least one test piece, and the driving mechanism is used to drive the rotating table to rotate, the test piece is used to adhere dust, the powder feeding mechanism comprises a rack, a driver arranged on the rack, a hopper fixed on the rack, and a feeding rod inserted into the hopper and rotating under the driving of the driver, the hopper is used to contain materials, and the feeding rod is used to feed the materials into the powder blowing part, the hopper comprises a V-shaped part and a straight cylinder part connected with the V-shaped part, the feeding rod is inserted into the straight cylinder part, the diameter of the feeding rod is equal to the diameter of the straight cylinder part, the feeding rod is provided with a spiral feeding groove, and the materials are scattered into the powder blowing part when the feeding rod rotates, the powder blowing part comprises a discharging cylinder, an air inlet part arranged on the discharging cylinder, and an air outlet part arranged on the discharging cylinder, the air inlet part is connected with the fan, the air outlet part is connected with the dust adhesion device, and the arrangement direction of the air inlet part and the air outlet part is perpendicular to the falling direction of the powder feeding mechanism.

2. The dust adhesion test system of claim 1, wherein: One end of the discharging cylinder is connected with the straight cylinder part.

3. The dust adhesion test system of claim 1, wherein: The rotating table comprises a main shaft rotatingly arranged on the sealed cavity and a clamping platform arranged on the main shaft, and at least one test piece is inserted into the clamping platform.

4. The dust adhesion test system of claim 3, wherein: The clamping platform is provided with a plurality of test pieces, and each test piece is made of different materials.

5. The dust adhesion test system of claim 4, wherein: The driving mechanism comprises a stepping motor arranged on the sealed cavity and a synchronous belt connecting the stepping motor and the main shaft.

6. The dust adhesion test system of claim 1, wherein: The dust adhesion device further comprises a humidifying device and / or a drying device, the humidifying device is used to control the humidity in the sealed cavity, and the drying device is used to adjust the dryness in the sealed cavity.

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