Micro-nano high-activity powder feeding, grinding and discharging integrated device

Abstract

The utility model discloses a micro-nano high-activity powder feeding, grinding and discharging integrated device, which relates to the technical field of processing equipment and comprises a nitrogen making machine, a grinding bin, an anti-explosion vacuum pump, a remote automatic control cabinet, a glove box, a vacuum packaging machine and an anti-explosion air compressor. According to the improved feeding, grinding and discharging integrated device, matched nitrogen making equipment is adopted for supplementing nitrogen to a grinding bin on line in real time, the oxygen content is monitored on line through an oxygen content tester capable of setting an alarm value in a system, and once the oxygen content exceeds the set alarm value, a chain protection function is triggered; the vibration grinding device can be stopped for protection until nitrogen is continuously introduced into the nitrogen making equipment to enable the oxygen content value in the grinding bin to be below an alarm value, and the vibration grinding device can be started to run, so that the vibration grinding production device can effectively ensure that the running oxygen content in the system meets the safety operation requirement; the situation that the oxygen content exceeds the standard due to untight sealing of the system is avoided, and safe operation of the system under the low oxygen content is effectively guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of processing equipment, and in particular to an integrated device for feeding, grinding and unloading micro-nanometer high-activity powders. Background Art

[0002] The following problems exist in the use of ordinary vibration grinding devices:

[0003] 1. When ordinary vibration grinding devices are grinding high-activity micro-nano powders and other powder materials, nitrogen will be filled into the grinding chamber as a protective gas. However, due to the poor sealing of the grinding chamber system and the long-term grinding vibration process, the sealing bolts will loosen, and nitrogen leakage will inevitably occur during the grinding process, causing air to enter the grinding chamber. Micro-nano high-activity powders will be squeezed, collided, and crushed with the grinding media under air conditions, which will cause fire and even explosion, which is very dangerous;

[0004] 2. During the loading process of the ordinary vibration grinding device, the loading valve is opened, and the pre-ground high-activity micro-nano powder is poured into the loading port of the grinding bin using an anti-static bag. During the unloading process, the unloading valve is opened and the anti-static plastic bag is used to load the material. During the loading and unloading process, the high-activity micro-nano powder will come into contact with the air. There is a safety risk of spontaneous combustion of the powder when it comes into contact with the air. In addition, the raw material powder and the ground product will be oxidized when in contact with the air, thereby reducing the activity of the powder. During the safe production operation process, the loading and unloading process is prone to cause dust flying at the work site. When the micro-nano high-activity powder comes into contact with the air in a dusty state, extremely small static sparks will cause dust explosions. Therefore, there are great safety risks and hidden dangers at the production site;

[0005] 3. When grinding micro-nano high-activity powders that decompose or even explode when heated to a certain temperature, ordinary vibration grinding devices cannot actively monitor and control the real-time temperature of the powders in the grinding chamber. They can only summarize empirical parameters through repeated practice and use intermittent shutdown to dissipate heat to ensure the safety of the grinding process. However, this often leads to production safety accidents during implementation. At the same time, the summarized process parameters are often inaccurate. After changing the feed amount and process parameters again, the original summarized parameters cannot be followed and the only option is to conduct another test.

[0006] 4. When using a vibration grinding device to grind micro-nano high-activity powders that produce gas when decomposed by heat, if too much gas accumulates in the grinding chamber, the pressure in the chamber will increase. On the one hand, it will destroy the nitrogen protection environment in the chamber and increase the safety risk of the grinding process. On the other hand, when the pressure is too high, the grinding chamber will collapse and cause a production safety accident. Summary of the invention

[0007] 1. Technical issues to be resolved

[0008] In view of the deficiencies in the prior art, the present invention provides an integrated device for feeding, grinding and unloading micro-nano high-activity powders to solve the problems raised in the above-mentioned background technology.

[0009] (II) Technical solution

[0010] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an integrated device for feeding, grinding and unloading micro-nano high-activity powders, comprising a nitrogen generator, a grinding bin, an explosion-proof vacuum pump, a remote automatic control cabinet, a glove box, a vacuum packaging machine and an explosion-proof air compressor, wherein one end of the top of the grinding bin is connected to butterfly valve 2, one end of the butterfly valve 2 away from butterfly valve 1 is connected to flexible connecting pipe 1, one end of the flexible connecting pipe 1 away from butterfly valve 2 is connected to a protective device, an air valve is connected to the protective device, an end of the top of the grinding bin away from butterfly valve 2 is connected to butterfly valve 1, one end of the butterfly valve 1 away from the grinding bin is connected to flexible connecting pipe 2, one end of the flexible connecting pipe 2 away from butterfly valve 1 is connected to a discharging butterfly valve, the discharging butterfly valve away from flexible connecting pipe 2 is connected to a feeding tank, and one end of the feeding tank away from the discharging butterfly valve is connected to a block blind plate port;

[0011] An explosion-proof motor is provided at the front side of the grinding bin, a butterfly valve three is connected to one side of the top of the grinding bin, an end of the butterfly valve three away from the grinding bin is connected to a material discharge bent clamp, an end of the material discharge bent clamp away from the butterfly valve three is connected to a flexible connecting pipe three, an end of the flexible connecting pipe three away from the material discharge bent clamp is connected to a butterfly valve four, an end of the butterfly valve four away from the flexible connecting pipe three is connected to a material discharge tank, an end of the material discharge tank away from the butterfly valve four is connected to a material discharge valve, and a vacuum pressure gauge two is installed on the material discharge tank;

[0012] The grinding chamber is connected with a three-way air nozzle at a position above the butterfly valve three, and the three-way air nozzle is connected with a vacuum pressure gauge one.

[0013] Preferably, an air spring seat is installed at the bottom of the grinding bin.

[0014] Preferably, the protection device is connected to the remote automatic control cabinet signal.

[0015] Preferably, the protection device is an integrated protector for temperature, pressure and oxygen content.

[0016] Preferably, the explosion-proof vacuum pump is connected to an end of the three-way air nozzle away from the grinding chamber.

[0017] Preferably, the nitrogen generator is connected to the other end of the three-way air nozzle away from the grinding chamber.

[0018] Preferably, the explosion-proof air compressor is connected to the air spring seat.

[0019] (III) Beneficial effects

[0020] Compared with the prior art, the present invention provides a device for feeding, grinding and unloading micro-nano high-activity powders, which has the following beneficial effects:

[0021] The modified integrated feeding, grinding and unloading device uses a matching nitrogen-making device to replenish nitrogen in the grinding chamber online in real time. The oxygen content is monitored online through an oxygen content tester with an alarm value that can be set inside the system. Once the oxygen content exceeds the set alarm value, the interlocking protection function will be triggered, and the vibration grinding device will stop for protection until the nitrogen-making device continues to introduce nitrogen to make the oxygen content in the grinding chamber below the alarm value. The vibration grinding device will start to run. This vibration grinding production device can effectively ensure that the oxygen content in the system meets the safety operation requirements, and the oxygen content will not exceed the standard due to loose system sealing, which effectively ensures the safe operation of the system under low oxygen content.

[0022] The integrated feeding, grinding and unloading device is equipped with a feeding tank and a unloading tank that can be vacuumed and filled with nitrogen, which are connected to the feeding valve and the unloading valve respectively, to ensure that the highly active micro-nano powder will not be oxidized by air and cause the activity to decrease during the feeding and unloading process, thereby ensuring the purity of the input grinding raw materials and the quality of the final grinding products, and at the same time greatly improving the on-site safe working conditions;

[0023] A soft connection device is proposed, which realizes the safe and stable connection between the feeding tank, the unloading tank and the safety interlocking protection system and the grinding chamber during the vibration grinding process, and completely solves the pain point that the vibration grinder cannot be stably connected with other devices during the grinding process;

[0024] The temperature sensor installed in the safety protection interlocking device connected to the grinding bin can monitor the internal temperature of the system online in real time, and the parking alarm temperature value can be set according to the safety characteristics of the material. At the same time, cold air inlet and return air outlet are set close to the outer wall of the grinding bin, and the external air cooler is turned on to deliver cold air to the grinding bin, which can completely solve the problems existing in ordinary vibration grinding equipment.

[0025] The pressure sensor installed inside the feeding, grinding and unloading integrated device can monitor the internal pressure of the system online. Once the pressure exceeds the set pressure value, the system will release to ensure that the internal pressure of the system is within the set range, thereby ensuring the safety of the grinding process;

[0026] By setting up a remote automatic control cabinet, the integrated loading, grinding and unloading device can realize remote start, set the temperature alarm stop value in the system, set the internal pressure value of the system and set the internal oxygen content value of the system. During the operation, personnel are away from the equipment, which improves the safety operation factor of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the present invention.

[0028] In the figure: 1. Butterfly valve one; 2. Butterfly valve two; 3. Butterfly valve three; 4. Explosion-proof vacuum pump; 5. Three-way air nozzle; 6. Vacuum pressure gauge one; 7. Nitrogen generator; 8. Grinding chamber; 9. Flexible connecting pipe one; 10. Air valve; 11. Remote automatic control cabinet; 12. Protection device; 13. Loading tank; 14. Glove box; 15. Discharging butterfly valve; 16. Block blind plate; 17. Flexible connecting pipe two; 18. Discharging valve; 19. Butterfly valve four; 20. Discharging tank; 21. Flexible connecting pipe three; 22. Discharging bending clamp; 23. Vacuum packaging machine; 24. Explosion-proof motor; 25. Explosion-proof air compressor; 26. Air spring seat; 27. Vacuum pressure gauge two. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The present invention provides a technical solution, such as Figure 1 As shown, a micro-nano high-activity powder feeding, grinding and unloading integrated device includes a nitrogen generator 7, a grinding bin 8, an explosion-proof vacuum pump 4, a remote automatic control cabinet 11, a glove box 14, a vacuum packaging machine 23 and an explosion-proof air compressor 25, one end of the top of the grinding bin 8 is connected to a butterfly valve 2, one end of the butterfly valve 22 away from the butterfly valve 1 is connected to a flexible connecting pipe 9, one end of the flexible connecting pipe 9 away from the butterfly valve 2 is connected to a protective device 12, and the protective device 12 is connected to an air valve 10, one end of the top of the grinding bin 8 away from the butterfly valve 2 is connected to a butterfly valve 1, one end of the butterfly valve 1 away from the grinding bin 8 is connected to a flexible connecting pipe 2 17, one end of the flexible connecting pipe 2 17 away from the butterfly valve 1 is connected to a discharging butterfly valve 15, the discharging butterfly valve 15 away from the flexible connecting pipe 2 17 is connected to a feeding tank 13, and one end of the feeding tank 13 away from the discharging butterfly valve 15 is connected to a block blind plate port 16;

[0031] An explosion-proof motor 24 is provided on the front side of the grinding bin 8, a butterfly valve 3 3 is connected to one side of the top of the grinding bin 8, an end of the butterfly valve 3 3 away from the grinding bin 8 is connected to a material discharge bent clamp 22, an end of the material discharge bent clamp 22 away from the butterfly valve 3 3 is connected to a soft connecting pipe 3 21, an end of the soft connecting pipe 3 21 away from the material discharge bent clamp 22 is connected to a butterfly valve 4 19, an end of the butterfly valve 4 19 away from the soft connecting pipe 3 21 is connected to a material discharge tank 20, an end of the material discharge tank 20 away from the butterfly valve 4 19 is connected to a material discharge valve 18, and a vacuum pressure gauge 27 is installed on the material discharge tank 20;

[0032] The grinding chamber 8 is connected to a three-way air nozzle 5 at a position above the butterfly valve 3, and the three-way air nozzle 5 is connected to a vacuum pressure gauge 6.

[0033] In this embodiment, an air spring seat 26 is installed at the bottom of the grinding chamber 8 .

[0034] In this embodiment, the protection device 12 is signal-connected to the remote automatic control cabinet 11 .

[0035] In this embodiment, the protection device 12 is an integrated protector for temperature, pressure and oxygen content.

[0036] In this embodiment, the explosion-proof vacuum pump 4 is connected to one end of the three-way air nozzle 5 away from the grinding chamber 8 .

[0037] In this embodiment, the nitrogen generator 7 is connected to the other end of the three-way air nozzle 5 away from the grinding chamber 8 .

[0038] In this embodiment, the explosion-proof air compressor 25 is connected to the air spring seat 26 .

[0039] Working principle of this device:

[0040] The detailed operation steps are as follows:

[0041] ① Before grinding: close butterfly valve 1, butterfly valve 2 and butterfly valve 3, and perform vacuum operation. Connect the vacuum air pipe of explosion-proof vacuum pump 4 to the vacuum nitrogen filling three-way nozzle 5, start the explosion-proof vacuum pump 4, observe the vacuum pressure gauge 6, until the vacuum degree is evacuated to -0.1Mpa. After vacuuming, manually connect the air pipe of nitrogen generator 7 to three-way nozzle 5 and fill nitrogen until the internal pressure of grinding chamber 8 is 0Mpa, then open butterfly valve 2, turn on automatic air supply and exhaust function, automatic air supply is realized by nitrogen generator 7, and exhaust function is realized by air valve 10 on soft connecting pipe 1 9 on the upper part of butterfly valve 2, observe the temperature, pressure and oxygen content displayed by protection device 12 in remote automatic control cabinet 11, until the internal oxygen content of grinding chamber 8 is less than or equal to 3.5% and the pressure is 3KPa, the feeding conditions are met.

[0042] ② Loading: Load the material in the glove box 14 in a nitrogen environment, close the discharge butterfly valve 15 and the block blind plate port 16, take out the loading tank 13 from the glove box 14, and connect it to the grinding bin 8 through the soft connecting pipe 17 at the bottom of the loading tank 13. At this time, the discharge butterfly valve 15 is closed and the butterfly valve 1 is closed;

[0043] Open the discharge butterfly valve 15. At this time, the material is in the soft connecting pipe 17. Close the discharge butterfly valve 15, open the butterfly valve 1 to feed the material. After the feeding is completed, close the butterfly valve 1.

[0044] ③. Operation: During the grinding process, butterfly valve 1 and butterfly valve 3 are closed, butterfly valve 2 is opened, the automatic air supply and exhaust functions are turned on, the explosion-proof motor 24 of the grinding device is started, and the explosion-proof air compressor 25 is turned on to inflate the air spring seat 26 of the vibration grinding device;

[0045] During the grinding process, the internal pressure of the grinding chamber 8 is maintained at 3 KPa, and the oxygen content is less than 3.5%.

[0046] ④, discharging: close the discharging valve 18 of the discharging tank 20, open the butterfly valve four 19, close the butterfly valve three 3, manually evacuate and fill the discharging tank 20, the soft connecting pipe three 21 and the discharging bent clamp 22 with nitrogen, observe the vacuum pressure gauge two 27 set on the discharging tank 20, evacuate to -0.1Mpa and then fill with nitrogen to 0MPa, open the butterfly valve three 3 and the butterfly valve four 19, start the vibration grinder, and realize the discharging in a fully sealed nitrogen protection environment. After the discharging is completed, close the butterfly valve three 3 and the butterfly valve four 19, move the discharging tank 20 to the inside of the glove box 14 in the nitrogen environment, and start the discharging and use the vacuum packaging machine 23 for vacuum packaging;

[0047] ⑤. Vacuum packaging: After disassembling the feed tank 20, move it to a glove box 14 in a nitrogen environment for vacuum packaging.

[0048] Through the online real-time nitrogen supplement device and the monitoring of the oxygen meter with settable alarm value inside the system, combined with the interlocking protection parking function, it can effectively ensure that the oxygen content in the system meets the set requirements, and the oxygen content will not exceed the standard due to the loose sealing of the system;

[0049] The vacuum-filled nitrogen-filled feeding tank 13 and the unloading tank 20 connected to the grinding chamber 8 ensure that the high-activity micro-nano powder raw materials and products will not be oxidized by air and reduce their activity. There is no dust flying during the feeding and unloading process, and the powder does not come into contact with the air and there is no risk of spontaneous combustion, ensuring the safety of the operation process.

[0050] By setting the grinding bin 8 system temperature sensor, the internal temperature of the system can be monitored online, and the parking alarm protection temperature can be set. Combined with the cooling fan inlet and return air cooling on the surface of the grinding bin 8, the temperature of the material can be controlled during the grinding process;

[0051] The internal pressure of the system can be monitored online through the pressure sensor in the grinding chamber 8 of the equipment. Once the pressure exceeds the set value, the system will release protection to ensure the safety of the grinding chamber 8;

[0052] By providing the upper material tank 13, the lower material tank 20 and the protective device 12 with soft connections corresponding to the grinding chamber 8, the pain point that the vibration grinder cannot be stably connected with other devices during the grinding process is solved.

[0053] By setting up a remote automatic control cabinet 11, the feeding, grinding and unloading integrated device can be started remotely, and the temperature, pressure and oxygen content values ​​in the grinding bin 8 can be viewed online through the automatic control cabinet. During the operation, personnel stay away from the equipment, which improves the safety operation factor of personnel.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for feeding, grinding and unloading micro-nano high-activity powders, characterized in that: The invention comprises a nitrogen generator (7), a grinding chamber (8), an explosion-proof vacuum pump (4), a remote automatic control cabinet (11), a glove box (14), a vacuum packaging machine (23) and an explosion-proof air compressor (25), wherein one end of the top of the grinding chamber (8) is connected to a butterfly valve 2 (2), one end of the butterfly valve 2 (2) away from the butterfly valve 1 (1) is connected to a flexible connecting pipe 1 (9), one end of the flexible connecting pipe 1 (9) away from the butterfly valve 2 (2) is connected to a protective device (12), and the protective device (12) is connected to an air valve (1 0), the end of the top of the grinding bin (8) away from the butterfly valve (2) is connected to the butterfly valve (1), the end of the butterfly valve (1) away from the grinding bin (8) is connected to the soft connecting pipe (17), the end of the soft connecting pipe (17) away from the butterfly valve (1) is connected to the discharge butterfly valve (15), the discharge butterfly valve (15) away from the soft connecting pipe (17) is connected to the feeding tank (13), and the end of the feeding tank (13) away from the discharge butterfly valve (15) is connected to a block-shaped blind plate opening (16); An explosion-proof motor (24) is arranged at the front side of the grinding chamber (8); a butterfly valve three (3) is connected to one side of the top of the grinding chamber (8); an end of the butterfly valve three (3) away from the grinding chamber (8) is connected to a material discharge bent clamp (22); an end of the material discharge bent clamp (22) away from the butterfly valve three (3) is connected to a flexible connecting pipe three (21); an end of the flexible connecting pipe three (21) away from the material discharge bent clamp (22) is connected to a butterfly valve four (19); an end of the butterfly valve four (19) away from the flexible connecting pipe three (21) is connected to a material discharge tank (20); an end of the material discharge tank (20) away from the butterfly valve four (19) is connected to a material discharge valve (18); and a vacuum pressure gauge two (27) is installed on the material discharge tank (20); The grinding chamber (8) is connected to a three-way air nozzle (5) at a position above the butterfly valve three (3), and the three-way air nozzle (5) is connected to a vacuum pressure gauge one (6).

2. The device for feeding, grinding and unloading micro-nano high-activity powders according to claim 1, characterized in that: An air spring seat (26) is installed at the bottom of the grinding bin (8).

3. The integrated device for feeding, grinding and unloading micro-nano high-activity powders according to claim 1, characterized in that: The protection device (12) is signal-connected to the remote automatic control cabinet (11).

4. The integrated device for feeding, grinding and unloading micro-nano high-activity powders according to claim 1, characterized in that: The protection device (12) is an integrated protector for temperature, pressure and oxygen content.

5. The integrated device for feeding, grinding and unloading micro-nano high-activity powders according to claim 1, characterized in that: The explosion-proof vacuum pump (4) is connected to one end of the three-way air nozzle (5) away from the grinding chamber (8).

6. The integrated device for feeding, grinding and unloading micro-nano high-activity powders according to claim 1, characterized in that: The nitrogen generator (7) is connected to the other end of the three-way air nozzle (5) away from the grinding chamber (8).

7. The integrated device for feeding, grinding and unloading micro-nano high-activity powders according to claim 2, characterized in that: The explosion-proof air compressor (25) is connected to the air spring seat (26).

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