CN218036220U - Coating experiment equipment - Google Patents

Abstract

The utility model discloses a coating experimental facilities, coating experimental facilities includes: the material buffer bin is provided with a feeding port; the first detection device comprises a first detection cabin and a first detection assembly; the second detection device comprises a second detection cabin and a second detection assembly; the first detection device detects the adhesion performance and the anti-seismic performance of the coating, the second detection device detects the wear-resisting performance of the coating, and the first detection device and the second detection device can judge whether the coating is conductive or not so as to confirm whether the coating contains metal or not; the first detection bin and the second detection bin can be quickly replaced by opening the bin door to improve the working efficiency.

Description

Coating experiment equipment

Technical Field

The utility model relates to a ternary material equipment coating technical field especially relates to a coating experimental facilities.

Background

Ternary lithium batteries have been widely used in power batteries for electric vehicles, and generally improve the energy density of the batteries by adjusting the proportion of nickel in the positive electrode material of the batteries. In the production process of the anode material, equipment and a pipeline are generally sprayed with a coating to prevent the materials from rubbing against the inner wall of the pipeline or the contact part of the materials and the equipment to generate magnetic foreign matters. Because the material particles of the ternary material are hard, the long-time collision between the coating and the material can cause the coating to fall off, so that the metal which is not covered by the coating and the material are rubbed with each other, and the material contains the metal. The introduction of the metal foreign materials into the battery may cause short circuits inside the battery after the battery is produced, thereby burning out the battery and even causing explosion accidents. In addition, the coating layer can be mixed with the material after falling off, so the material of the coating layer itself cannot be metal. How to select a proper coating is particularly important in the production industry of new energy lithium batteries, it is necessary to inspect coatings of different materials to determine whether the coatings are suitable for use in the production process of the positive electrode material.

At present, most of the equipment for inspecting the coating can only be used for inspecting the wear resistance of the coating, but cannot be used for inspecting the adhesion performance and the anti-seismic performance of the coating, and cannot be used for judging whether the coating contains metal or not; and because the structure of equipment itself is complicated, need dismantle the pipeline when changing coating or material, lead to the inspection inefficiency of coating.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to at least partially solve one of the technical problems in the related art. For this reason, the utility model provides a coating experimental facilities, this equipment structure is simple, can inspect wear resistance, adhesion performance, anti-seismic performance and the judgement coating of coating whether electrically conductive, and coating and material can easily be changed to this equipment, improve work efficiency.

The technical scheme of the utility model as follows, coating experimental facilities includes:

a material buffer bin;

the first detection device comprises a first detection bin and a first detection assembly, a feeding port of the first detection bin is connected with a discharging port of the material buffer bin, and the first detection assembly is used for detecting the adhesion performance and the anti-seismic performance of the coating and judging whether the coating is conductive or not;

the second detection device comprises a second detection bin and a second detection assembly, wherein a feeding port of the second detection bin is connected with a discharge port of the first detection bin, and the second detection assembly is used for detecting the wear resistance of the coating and judging whether the coating is conductive or not.

According to the utility model discloses coating experimental facilities has following technological effect at least: the first detection device detects the adhesion performance and the anti-seismic performance of the coating, the second detection device detects the wear-resisting performance of the coating, and the first detection device and the second detection device can judge whether the coating is conductive or not so as to confirm whether the coating contains metal or not; the first detection bin and the second detection bin can replace the coating by opening the bin door so as to improve the working efficiency.

Further, the first detection assembly comprises a first detection table, an air hammer and a first guide piece; the first detection table is located in the first detection bin, the first detection table is used for providing a first attachment surface for a coating, the air hammer is used for knocking the back surface, far away from the first attachment surface, of the first detection table, and the first detection guide piece is used for detecting whether the coating on the first attachment surface of the first detection table is damaged or not.

Further, the first conducting test piece comprises a first voltage transmitter and a first voltage receiver; the first voltage conveyor is used for applying voltage to the first attachment surface of the first detection table; the first voltage receiver is connected with the first detection table and used for detecting whether the first detection table is electrified or not.

Further, the second detection assembly comprises a second detection table, a compressed air supply device, a gas-solid mixer and a second detection guide piece; the second detection table is positioned in the second detection bin and used for providing a second attachment surface for the coating; a gas inlet of the gas-solid mixer is connected with the compressed air supplier, a solid inlet of the gas-solid mixer is connected with a discharge hole of the first detection bin, and an outlet of the gas-solid mixer is connected with a feeding hole of the second detection bin; a nozzle connected with a feeding port of the second detection bin is arranged in the second detection bin, and an outlet of the nozzle faces the second attachment surface; the second sensing member is used for detecting whether the coating on the second adhesion surface of the second detection table is damaged or not.

Further, the second sensing member comprises a second voltage transmitter and a second voltage receiver, wherein the second voltage transmitter is used for applying voltage to a second attachment surface on the second detection table; and the second voltage receiver is connected with the second detection platform and used for detecting whether the second detection platform is electrified or not.

Further, the coating experiment equipment also comprises a material recovery bin, wherein a feeding port of the material recovery bin is connected with a discharging port of the second detection bin, and a discharging port of the material recovery bin is connected with a feeding port of the material buffer bin; a filtering device is arranged in the material recovery bin, and the filtering device divides an inner cavity of the material recovery bin into a material area and a gas area; the material inlet and the material outlet of the material recovery bin are both positioned in the material area; the gas zone is connected with an exhaust fan through a pipeline, and the exhaust fan can pump the materials in the second detection bin to the material zone.

Further, the filtering device comprises a plurality of titanium rod filters; and the air outlet of the titanium rod filter is positioned in the gas area, and the air inlet of the titanium rod filter is positioned in the material area.

Further, the coating experiment equipment also comprises a back blowing device, wherein the back blowing device comprises a compressed air supplier and a back blowing pipe, and one end of the back blowing pipe is connected with the compressed air supplier; the other end of the blowback pipe penetrates into the gas area, and the blowback pipe positioned in the gas area is provided with a plurality of gas blowing holes; the plurality of air blowing holes correspond to the plurality of titanium rod filters one by one, and the air blowing holes face to the air outlets of the titanium rod filters.

Further, the pan feeding mouth in material recovery storehouse with the discharge gate in second detection storehouse passes through the pipe connection, is equipped with air supplement unit on this pipeline.

Further, a discharge port of the material recovery bin is connected with a feed port of the material buffer bin through a pipeline, and a double butterfly valve is arranged on the pipeline; the double butterfly valve comprises a first butterfly valve and a second butterfly valve, and the double butterfly valves are used for enabling feeding and discharging of the material recovery bin to be not affected mutually.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of the coating experiment apparatus of the present invention.

Reference numerals:

a material buffer bin 100 and a feeding port 110;

a first inspection chamber 210, a first inspection station 220, and an air hammer 230;

a second detection bin 310, a second detection table 320, a gas-solid mixer 330 and a nozzle 340;

the device comprises a material recovery bin 400, a material area 410, a gas area 420, a titanium rod filter 430, a back-blowing gas pipe 440 and a gas blowing hole 441;

an exhaust fan 500, a compressed air supply device 510, an air supplement device 520, a double butterfly valve 530, a first butterfly valve 531 and a second butterfly valve 532;

a first valve 601, a second valve 602, a third valve 603, a fourth valve 604, a fifth valve 605, and a safety filter 606.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated, for example, up, down, left, right, etc., referred to the orientation description is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as excluding the number, and the terms greater than, less than, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Some embodiments of the present invention will be further explained with reference to the accompanying drawings.

The technical scheme of the utility model is as follows, refer to fig. 1, coating experimental facilities includes material buffer storage 100, first detection device and second detection device, material buffer storage 100 is located first detection device's top, material buffer storage 100 is equipped with dog-house 110, first detection device includes first detection storehouse 210 and first detection component, the dog-house of first detection storehouse 210 is connected with the discharge gate of material buffer storage 100, the coating that is surveyed is placed in first detection storehouse 210, first detection component can detect the adhesion performance and the anti-seismic performance of the coating that is surveyed and can judge whether the coating is electrically conductive; the second detection device is located the below of first detection device, and the second detection device includes second detection storehouse 310 and second determine module, and the pan feeding mouth of second detection storehouse 310 is connected with the discharge gate of first detection storehouse 210, and second determine module can detect the wear resistance of being surveyed the coating and can judge whether the coating is electrically conductive.

The two coatings of the same kind are respectively placed in a first detection bin 210 and a second detection bin 310, materials for flushing the coatings are put into a material buffer bin 100 from a feeding port 110, the materials move into the first detection bin 210 from the material buffer bin 100, and a first detection assembly detects the adhesion performance and the anti-seismic performance of the coatings in the first detection bin 210 and judges whether the coatings are conductive or not; then, the material moves from the first detection chamber 210 to the second detection chamber 310, and the second detection assembly detects the wear resistance of the coating located in the second detection chamber 310 and determines whether the coating is conductive.

It should be noted that, the first detection bin 210 and the second detection bin 310 both have bin gates and are made of transparent materials, so that different coatings can be easily replaced through the bin gates, and the wear condition and adhesion condition of the coating being measured in the bin can be clearly seen.

Preferably, coating experimental facilities still includes material recovery storehouse 400, and material recovery storehouse 400 is located second detection device's below, and the pan feeding mouth and the second of material recovery storehouse 400 detect the discharge gate in storehouse 310 and are connected, and the discharge gate of material recovery storehouse 400 is connected with the pan feeding mouth of material buffer storehouse 100, and material recovery storehouse 400 is connected with air exhauster 500, and air exhauster 500 can be crossed the material pumping in the second detection storehouse 310 to material recovery storehouse 400 in. Air exhauster 500 starts can make the atmospheric pressure in the material recovery storehouse 400 reduce, and the material in the second detects the storehouse 310 removes the material recovery storehouse 400 under the effect of negative pressure in, and the material removes to material buffer storehouse 100 from the material recovery storehouse 400 again, and the material can circulate in coating experimental facilities, constantly acts on the coating in order to inspect the performance of coating.

Preferably, the outer wall of the material buffer bin 100 is provided with a feeding flip cover, and the feeding flip cover can be used for sealing the feeding port 110.

Preferably, the discharge port of the material buffer bin 100 is connected to the feed port of the first detection bin 210 through a pipeline, and a fifth valve 605 is arranged on the pipeline and can regulate the flow rate of the material entering the first detection bin 210.

Preferably, the exhaust fan 500 is connected to the material recycling bin 400 through a pipeline, and a safety filter 606 is disposed on the pipeline, wherein the safety filter 606 can filter impurities in the gas, so that the gas can be safely and pollution-free discharged into the atmosphere.

Further, referring to fig. 1, the first detecting assembly includes a first detecting table 220, an air hammer 230 and a first guiding member, the first detecting table 220 is located in the first detecting chamber 210, the first detecting chamber 210 is funnel-shaped, that is, the chamber wall of the first detecting chamber 210 is inclined downward, the first detecting table 220 can provide a first attaching surface for the coating, the first attaching surface is parallel to the chamber wall of the first detecting chamber 210, the air hammer 230 is embedded and installed on the first detecting chamber 210 and located below the first detecting table 220, and the air hammer 230 can hammer the back of the first detecting table 220 away from the first attaching surface to detect the adhesion performance of the coating.

It can be understood that the coating to be detected is attached to the table top of the first detection table 220, the table top of the first detection table 220 is a first attachment surface, the air hammer 230 strikes the back surface of the first detection table 220 to detect the adhesion performance of the coating, when the coating is knocked by the air hammer 230 to generate bulges, the swelled coating is easily broken in the scouring process of the material, the first detection guide piece can detect whether the coating on the table top of the first detection table 220 is damaged, and the adhesion performance of the coating is detected by visually observing the bulge condition of the coating and the interval time from the beginning to the damage of the coating.

Further, the first sensing member includes a first voltage transmitter for applying a voltage to a first adhesive surface of the first sensing stage 220 to which the coating to be sensed is attached, and a first voltage receiver connected to the first sensing stage 220; it can be understood that the coating to be detected on the first adhesion surface is not conductive, when the coating is damaged, that is, after the first adhesion surface of part of the first detection platform 220 is exposed, a voltage is applied to the first adhesion surface of the first detection platform 220, and the first detection platform 220 is conductive, so that the first voltage receiver receives the voltage to detect that the first detection platform 220 is charged, thereby determining that the coating on the table top of the first detection platform 220 is damaged.

It should be noted that, if the coating to be tested itself contains metal, that is, when the coating itself can conduct electricity, the first voltage receiver detects that the first detection platform 220 is charged before the adhesion performance of the coating is checked, because the required coating cannot contain metal, it is not necessary to test the adhesion performance and the anti-seismic performance of the coating, and the coating is directly eliminated to save time and improve work efficiency.

Further, referring to fig. 1, the second detection assembly includes a second detection platform 320, a compressed air supplier 510, a gas-solid mixer 330 and a second detection guide, the second detection platform 320 is located in the second detection chamber 310, a gas inlet of the gas-solid mixer 330 is connected to the compressed air supplier 510, a solid inlet of the gas-solid mixer 330 is connected to a discharge port of the first detection chamber 210, an outlet of the gas-solid mixer 330 is connected to a feed port of the second detection chamber 310, a nozzle 340 connected to the feed port of the second detection chamber 310 is disposed in the second detection chamber 310, the second detection chamber 310 is funnel-shaped, that is, a chamber wall of the second detection chamber 310 is inclined downward, the second detection platform 320 can provide a second adhesion surface for the coating, the second adhesion surface is parallel to the chamber wall of the second detection chamber 310, and an outlet of the nozzle 340 faces the second adhesion surface of the second detection platform 320.

It can be understood that the coating to be tested is attached and installed on the table top of the second testing table 320, that is, the table top of the second testing table 320 is the second attachment surface, the material is fed into the gas-solid mixer 330 from the first testing bin 210, the compressed gas is fed into the gas-solid mixer 330 from the compressed air supplier 510, the gas and the material are mixed together in the gas-solid mixer 330 and generate high pressure, the high pressure gas-solid mixture is fed into the second testing bin 310 through the nozzle 340 and is flushed on the coating on the table top of the second testing table 320, thereby performing the wear resistance test of the coating, and the second testing guide can test whether the coating on the table top of the second testing table 320 is damaged.

It will be appreciated that the nozzle 340 can increase the velocity of the material impacting the coating to reduce the experimental time and improve the efficiency of the operation.

Preferably, the gas inlet of the gas-solid mixer 330 is connected to the compressed air supplier 510 through a pipe, the pipe is provided with a first valve 601, and the gas pressure can be adjusted by adjusting the first valve 601; the solid inlet of the gas-solid mixer 330 is connected with the discharge hole of the first detection bin 210 through a pipeline, a second valve 602 is arranged on the pipeline, and the amount of the materials can be adjusted by adjusting the second valve 602; the cooperation of the first valve 601 and the second valve 602 can adjust the impact strength of the material on the coating and the material amount of the impact.

Further, the second testing member includes a second voltage transmitter and a second voltage receiver, the second voltage transmitter applies a voltage to a second adhesion surface of the second testing platform 320 to which the coating to be tested is adhered, and the second voltage receiver is connected to the second testing platform 320; it can be understood that the coating to be tested on the second adhesion surface is not conductive, when the coating is damaged, that is, a portion of the second adhesion surface of the second testing platform 320 is exposed, a voltage is applied to the second adhesion surface of the second testing platform 320, and the second testing platform 320 is conductive, so that the second voltage receiver receives the voltage to test that the second testing platform 320 is charged, thereby determining that the coating on the table top of the second testing platform 320 is damaged.

It should be noted that, if the coating to be tested itself contains metal, that is, when the coating itself can conduct electricity, the second voltage receiver detects that the second detection station 320 is charged before the adhesion performance of the coating is checked, and because the required coating cannot contain metal, it is not necessary to test the wear resistance of the coating, and the coating is directly eliminated, so as to save time and improve working efficiency.

Further, referring to fig. 1, a filtering device is arranged in the material recycling bin 400, the filtering device divides an inner cavity of the material recycling bin 400 into a material area 410 and a gas area 420, the gas area 420 is located above the material area 410, a feeding port and a discharging port of the material recycling bin 400 are both located in the material area 410, and the exhaust fan 500 is communicated with the gas area 420 through a pipeline. It is understood that the exhaust fan 500 pumps the gas in the material recovery bin 400 to reduce the pressure of the gas in the material recovery bin 400, so that the mixture of the gas and the material in the second detection bin 310 moves to the material area 410 of the material recovery bin 400 through the pipeline under the action of the pressure of the gas. After the mixture is filtered by the filtering device, the gas reaches the gas area 420 through the filtering device and is discharged by the exhaust fan 500, and the material is remained in the material area 410 and then enters the material buffer bin 100 again, so that the material can continuously circulate to flush the coating, a large amount of materials are avoided, and the cost is saved.

Further, referring to fig. 1, the filtering apparatus includes a plurality of titanium rod filters 430, the plurality of titanium rod filters 430 are sequentially arranged from left to right, an air outlet is formed at the upper end of each titanium rod filter 430, the air outlet is located in the gas area 420, an air inlet is formed at the lower end of each titanium rod filter 430, and the air inlet is located in the material area 410. It will be appreciated that after the mixture of material and gas passes through the titanium rod filter 430, the gas enters the gas zone 420 and the material is filtered by the titanium rod filter 430 and remains in the material zone 410.

Further, referring to fig. 1, the coating experiment equipment further comprises a blowback device, the blowback device comprises a compressed air supply 510 and a blowback pipe 440, one end of the blowback pipe 440 is connected with the compressed air supply 510, the other end of the blowback pipe 440 penetrates into the gas area 420, the blowback pipe 440 in the gas area 420 is provided with a plurality of gas blowing holes 441, the plurality of gas blowing holes 441 correspond to the plurality of titanium rod filters 430 one by one, and the gas blowing holes 441 face to the gas outlets of the titanium rod filters 430; it can be understood that the compressed air supplier 510 supplies compressed air into the blowback pipe 440, the air is blown out from the air blowing holes 441 and enters the titanium rod filter 430 through the air outlet of the titanium rod filter 430, i.e. the material in the titanium rod filter 430 can be blown back to the material area 410, thereby preventing the titanium rod filter 430 from being blocked, avoiding the need of manual cleaning, and improving the working efficiency.

Preferably, a third valve 603 is disposed on the blowback pipe 440, and the third valve 603 can regulate the flow of gas.

Further, referring to fig. 1, the material inlet of the material recycling bin 400 and the material outlet of the second detection bin 310 are connected through a pipeline, the pipeline is connected with the air supply device 520, a fourth valve 604 is arranged between the air supply device 520 and the pipeline, the air supply device 520 can be inflated to enter the pipeline, the situation that the pipeline and equipment are damaged due to too low air pressure inside the pipeline is prevented, and the fourth valve 604 can adjust the air flow.

Further, referring to fig. 1, the discharge port of the material recycling bin 400 is connected with the feed port of the material buffering bin 100 through a pipe, a double butterfly valve 530 is arranged on the pipe, the material recovery bin 400 is positioned above the material buffer bin 100, the double butterfly valve 530 comprises a first butterfly valve 531 and a second butterfly valve 532, and the first butterfly valve 531 is positioned above the second butterfly valve 532; it can be understood that the air pressure in the material recovery bin 400 is reduced by the suction fan 500, so that the material in the second detection bin 310 can move into the material recovery bin 400 by the air pressure; in order to guarantee the leakproofness of material recovery storehouse 400, avoid the material to remove the in-process of material buffering storehouse 100 from material recovery storehouse 400 in, material recovery storehouse 400 and material buffering storehouse 100 intercommunication lead to atmospheric pressure to rise and can't continue to remove the material from second detection storehouse 310 to material recovery storehouse 400 in, first butterfly valve 531 and second butterfly valve 532 can not be opened simultaneously, need to guarantee promptly that material recovery storehouse 400 and material buffering storehouse 100 can not communicate.

For example, when the first butterfly valve 531 is opened and the second butterfly valve 532 is closed, the material passes through the first butterfly valve 531 from the material recycling bin 400 and is located on the second butterfly valve 532, then, when the first butterfly valve 531 is closed and the second butterfly valve 532 is opened, the material located between the first butterfly valve 531 and the second butterfly valve 532 can enter the material buffer bin 100, and the process is circulated; can guarantee like this that the pan feeding and the ejection of compact of material recovery storehouse 400 do not influence each other, when material recovery storehouse 400 can accept the material from in the second detection storehouse 310, also can carry the material to get into in the material buffering storehouse 100.

In the description herein, references to the description of "some embodiments" mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A coating experiment apparatus, comprising:

a material buffer bin (100);

the first detection device comprises a first detection bin (210) and a first detection assembly, a feeding port of the first detection bin (210) is connected with a discharging port of the material buffer bin (100), and the first detection assembly is used for detecting the adhesion performance and the anti-seismic performance of the coating and judging whether the coating is conductive or not;

the second detection device comprises a second detection bin (310) and a second detection assembly, a feeding port of the second detection bin (310) is connected with a discharging port of the first detection bin (210), and the second detection assembly is used for detecting the wear resistance of the coating and judging whether the coating is conductive or not.

2. The coating experiment apparatus of claim 1, wherein the first detection assembly comprises a first detection station (220), an air hammer (230), and a first guide; the first detection table (220) is located in the first detection bin (210), the first detection table (220) is used for providing a first adhesion surface for a coating, the air hammer (230) is used for knocking the back surface, away from the first adhesion surface, of the first detection table (220), and the first detection guide piece is used for detecting whether the coating on the first adhesion surface of the first detection table (220) is damaged or not.

3. The coating experiment apparatus of claim 2, wherein the first conductance measuring device comprises a first voltage transmitter and a first voltage receiver; the first voltage conveyor is used for applying voltage to the first attachment surface of the first detection table (220); the first voltage receiver is connected with the first detection table (220) and used for detecting whether the first detection table (220) is electrified or not.

4. The coating experiment apparatus of claim 1, wherein the second detection assembly comprises a second detection station (320), a compressed air supply (510), a gas-solid mixer (330), and a second guide; the second detection table (320) is positioned in the second detection bin (310), and the second detection table (320) is used for providing a second adhesion surface for the coating; a gas inlet of the gas-solid mixer (330) is connected with the compressed air supply device (510), a solid inlet of the gas-solid mixer (330) is connected with a discharge hole of the first detection bin (210), and an outlet of the gas-solid mixer (330) is connected with a feed hole of the second detection bin (310); a nozzle (340) connected with a feeding port of the second detection bin (310) is arranged in the second detection bin (310), and an outlet of the nozzle (340) faces the second attachment surface; the second sensing member is used for detecting whether the coating on the second attachment surface of the second detection table (320) is damaged.

5. The coating experiment apparatus of claim 4, wherein the second test guide comprises a second voltage transmitter for applying a voltage to a second attachment surface at the second test station (320) and a second voltage receiver; the second voltage receiver is connected with the second detection table (320) and used for detecting whether the second detection table (320) is electrified or not.

6. The coating experiment equipment according to claim 1, further comprising a material recycling bin (400), wherein a feeding port of the material recycling bin (400) is connected with a discharging port of the second detection bin (310), and a discharging port of the material recycling bin (400) is connected with a feeding port of the material buffer bin (100); a filtering device is arranged in the material recovery bin (400), and the filtering device divides the inner cavity of the material recovery bin (400) into a material area (410) and a gas area (420); a feeding port and a discharging port of the material recovery bin (400) are both positioned in the material area (410); the gas area (420) is connected with an exhaust fan (500) through a pipeline, and the exhaust fan (500) can pump the materials in the second detection bin (310) into the material area (410).

7. The coating experiment apparatus of claim 6, wherein the filtering means comprises a plurality of titanium rod filters (430); the air outlet of the titanium rod filter (430) is positioned in the gas area (420), and the air inlet of the titanium rod filter (430) is positioned in the material area (410).

8. The coating experiment equipment, according to the claim 7, is characterized in that the coating experiment equipment further comprises a back blowing device, the back blowing device comprises a compressed air supply device (510) and a back blowing pipe (440), one end of the back blowing pipe (440) is connected with the compressed air supply device (510); the other end of the blowback pipe (440) penetrates into the gas area (420), and the blowback pipe (440) positioned in the gas area (420) is provided with a plurality of blowing holes (441); the plurality of air blowing holes (441) correspond to the plurality of titanium rod filters (430) one by one, and the air blowing holes (441) face to the air outlet of the titanium rod filters (430).

9. The coating experiment equipment of claim 6, wherein the feed inlet of the material recovery bin (400) is connected with the discharge outlet of the second detection bin (310) through a pipeline, and the pipeline is provided with an air supply device (520).

10. The coating experiment equipment of claim 6, wherein the discharge port of the material recovery bin (400) is connected with the feed port of the material buffer bin (100) through a pipeline, and a double butterfly valve (530) is arranged on the pipeline; the double-butterfly valve (530) comprises a first butterfly valve (531) and a second butterfly valve (532), and the double-butterfly valve (530) is used for enabling the feeding and the discharging of the material recovery bin (400) not to influence each other.

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