High-purity powder preparation device protected by low-temperature nitrogen
By using a high-purity powder preparation device with low-temperature nitrogen protection and a titanium alloy liner, the problems of uneven temperature, iron contamination, and agglomeration were solved, achieving efficient and pure powder preparation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JINZHOU SHITONG NEW MATERIALS CO LTD
- Filing Date
- 2025-06-27
- Publication Date
- 2026-05-15
AI Technical Summary
Existing powder-making equipment suffers from problems such as excessive oxygen increase due to temperature rise, easy powder agglomeration, iron impurity contamination, uneven temperature, and difficulty in powder cleaning, which affect the efficiency and quality of high-purity powder preparation.
The high-purity powder preparation device, which employs low-temperature nitrogen protection, utilizes a titanium alloy liner and titanium alloy grinding rod, combined with multi-point nitrogen injection and a vibration motor. It avoids iron contamination by cooling with nitrogen and controlling the temperature uniformly, and facilitates powder discharge through tilting and vibration.
It effectively reduces temperature, decreases oxidation and agglomeration, ensures powder consistency, improves powdering efficiency, avoids iron contamination, and simplifies the cleaning process.
Smart Images
Figure CN224236986U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of powder preparation equipment technology, and more specifically, to a high-purity powder preparation device under low-temperature nitrogen protection. Background Technology
[0002] In the industrial production of high-purity metal, nitride, boride, and carbide powder materials, such as the preparation of zirconium nitride, zirconium carbide, and high-purity chromium powder, alloy powder preparation equipment is often used. Existing powder preparation equipment has the following problems:
[0003] 1. Conventional ball milling equipment results in low grinding efficiency due to increased temperature and oxygen increase exceeding 0.1% with increasing milling time, and powder agglomeration. 2. Ball milling of ordinary iron-based materials results in a high amount of iron impurities. When preparing high-purity metal powders, iron impurities can seriously affect product performance, and rust and other impurities can be introduced during grinding due to oxidation or wear. 3. Single-point nitrogen injection leads to uneven temperature inside the jar (±15℃), affecting powder consistency. 4. Powder is easily retained inside the grinding jar, causing waste and making cleaning difficult. Utility Model Content
[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a high-purity powder preparation device under low-temperature nitrogen protection, which aims to solve the problems mentioned in the background art.
[0005] This utility model provides the following technical solution: a high-purity powder preparation device under low-temperature nitrogen protection, comprising a support and a grinding jar disposed above the support. A vibration motor is fixed at the bottom of the grinding jar, and abrasive is placed inside the grinding jar. An air inlet pipe is fixed at the top center of the grinding jar, and an exhaust port is opened at the top of the grinding jar. A nitrogen spray pipe is fixed at the bottom of the air inlet pipe. A discharge port is provided on one side of the grinding jar. Two support columns and two telescopic rods are fixed above the support. Springs are fixed at the top of the support columns and telescopic rods, and connecting rods are fixed at the top of the springs. The connecting rods are hinged to the bottom of the grinding jar. The support columns are located below the grinding jar on the side away from the discharge port, and the telescopic rods are located below the grinding jar on the side closer to the discharge port.
[0006] As a further preferred embodiment of this utility model, a baffle is vertically inserted at the discharge port. Two types of baffles are included: a perforated baffle with a hole in the center and a sealed baffle with a closed center. A retaining ring is fixed to the top of the baffle, and elastic limiting plates are fixed to the lower sides of both sides of the retaining ring. A gap exists between the elastic limiting plates and the sidewalls of the baffle. The retaining ring is engaged with the top of the discharge port. The elastic limiting plates and the retaining ring cooperate to fix the baffle at the discharge port. Rubber sealing gaskets are fixed to the contact sides of the elastic limiting plates and the retaining ring with the discharge port. The baffle design achieves closure, allowing for the separate entry and exit of powder and abrasive.
[0007] As a further preferred embodiment of this utility model, 6-8 nitrogen nozzles are evenly provided below the nitrogen nozzle, the nitrogen nozzles face upwards towards the abrasive, and the upper part of the air inlet pipe is made of flexible material, so that uniform nitrogen spraying can be achieved through multiple nozzles.
[0008] As a further preferred embodiment of this utility model, a limiting rod is fixed at the top of the support column and the telescopic column, and the outer wall of the limiting rod is spaced 4-6mm from the inner side of the spring; a limiting head is provided at the top of the limiting rod, and the limiting head is inserted into the connecting rod, with the outer wall of the limiting head spaced 4-6mm from the bottom groove of the connecting rod, to avoid excessive vibration and damage.
[0009] As a further preferred embodiment of this utility model, there are two vibration motors, symmetrically arranged on the front and rear sides of the bottom of the grinding jar. Each vibration motor includes an output motor and an eccentric swing block. The output motor is fixed inside the vibration motor, and the eccentric swing block is fixed to the output shaft of the output motor. By setting two vibration motors with different frequencies, the grinding effect is improved.
[0010] As a further preferred embodiment of this utility model, a buffer pad is fixed between the telescopic rod and the spring connection. The buffer pad is made of rubber to reduce wear on the telescopic rod.
[0011] As a further preferred embodiment of this utility model, an insulation layer is fixed to the outside of the grinding jar. The insulation layer includes an inner insulation layer of polyurethane foam and a protective outer layer made of aluminum plate, which reduces heat loss and protects the inner insulation layer through the protective outer layer.
[0012] As a further preferred embodiment of this invention, the abrasive is a plurality of titanium alloy grinding rods, the inner lining of the grinding jar is titanium alloy, and the hardness of the inner lining and the titanium alloy grinding rods is HV≥300, so as to avoid iron contamination of the metal powder.
[0013] As a further preferred embodiment of this invention, one or more temperature sensors are provided inside the grinding jar to detect the temperature inside the grinding jar and adjust the nitrogen gas intake according to the temperature.
[0014] As a further preferred embodiment of this invention, a filter screen is threadedly connected to the exhaust port to discharge excess nitrogen gas, prevent grinding powder from overflowing, and facilitate replacement.
[0015] The technical effects and advantages of this utility model are as follows:
[0016] 1. By using cylindrical abrasives, the contact area is increased, the friction gap is reduced, and the friction efficiency is improved. Furthermore, by injecting low-temperature nitrogen gas, the temperature is lowered, powder agglomeration is avoided, the material brittleness is increased, and the powdering efficiency is improved.
[0017] 2. Iron contamination is completely avoided by using a titanium alloy liner and titanium alloy grinding rod (HV≥300).
[0018] 3. Nitrogen injection at multiple points ensures uniform temperature and avoids uneven local temperatures that could affect powder consistency.
[0019] 4. Inclining and vibration facilitate powder discharge to reduce residue.
[0020] 5. Reduce oxygen content and decrease oxidation by injecting nitrogen. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments of this disclosure will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings.
[0022] Figure 1 This is a schematic diagram of the high-purity powder preparation device under low-temperature nitrogen protection according to this utility model.
[0023] Figure 2 This is a side view of the high-purity powder preparation apparatus under low-temperature nitrogen protection according to this invention.
[0024] Figure 3 This is a schematic diagram of the vibration motor in the low-temperature nitrogen-protected high-purity powder preparation device of this utility model.
[0025] Figure 4 This is a schematic diagram of the exhaust pipe in the high-purity powder preparation device with low-temperature nitrogen protection according to this utility model.
[0026] Figure 5 This is a schematic diagram of the perforated baffle in the low-temperature nitrogen-protected high-purity powder preparation device of this utility model.
[0027] Figure 6 This is a schematic diagram of the closed baffle in the low-temperature nitrogen-protected high-purity powder preparation device of this utility model.
[0028] Figure 7 for Figure 1 Enlarged view of point A.
[0029] The attached diagram is labeled as follows: 1. Inlet pipe; 2. Nitrogen nozzle; 3. Abrasive; 4. Grinding jar; 5. Insulation layer; 6. Connecting rod; 7. Spring; 8. Limiting rod; 9. Support column; 10. Support; 11. Telescopic rod; 12. Buffer pad; 13. Vibration motor; 14. Discharge port; 15. Baffle; 16. Exhaust vent; 17. Temperature sensor; 201. Nitrogen nozzle; 801. Limiting head; 1301. Eccentric swing block; 1302. Output motor; 1501. Perforated baffle; 1502. Buffer ring; 1503. Elastic limiting plate; 1504. Sealing baffle. Detailed Implementation
[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0031] See Figure 1 and Figure 2 As shown, a high-purity powder preparation device under low-temperature nitrogen protection includes a support 10 and a grinding jar 4 disposed above the support 10. A vibration motor 13 is fixed to the bottom of the grinding jar 4. Abrasive material 3 is placed inside the grinding jar 4. An air inlet pipe 1 is fixed to the top center of the grinding jar 4. An exhaust port 16 is opened on the top of the grinding jar 4. A nitrogen spray pipe 2 is fixed to the bottom of the air inlet pipe 1. A discharge port 14 is provided on one side of the grinding jar 4. Two support columns 9 and two telescopic rods 11 are fixed above the support 10. Springs 7 are fixed to the top of the support columns 9 and the telescopic rods 11. A connecting rod 6 is fixed to the top of the springs 7. The connecting rod 6 is hinged to the bottom of the grinding jar 4. The support columns 9 are located below the side of the grinding jar 4 away from the discharge port 14. The telescopic rods 11 are located below the side of the grinding jar 4 near the discharge port 14. The abrasive material 3 consists of multiple titanium alloy grinding rods. The inner lining of the grinding jar 4 is made of titanium alloy. The hardness of the inner lining and the titanium alloy grinding rods is HV≥300 to avoid iron contamination of the metal powder.
[0032] like Figure 1 , Figure 5 and Figure 6 As shown in this embodiment of the present invention, a baffle 15 is vertically inserted into the discharge port 14. There are two types of baffle 15: a perforated baffle 1501 with a hole in the middle and a sealed baffle 1504 with a sealed middle. A retaining ring 1502 is fixed to the top of the baffle 15, and elastic limiting plates 1503 are fixed to the lower sides of the retaining ring 1502. There is a gap between the elastic limiting plates 1503 and the side wall of the baffle 15. The retaining ring 1502 is snapped into the top of the discharge port 14. The elastic limiting plates 1503 and the retaining ring 1502 cooperate to fix the baffle 15 to the discharge port 14. Rubber sealing gaskets are fixed to the contact sides of the elastic limiting plates 1503 and the retaining ring 1502 with the discharge port 14. The baffle 15 is used to achieve closure, so that the powder and abrasive 3 can enter and exit separately.
[0033] like Figure 1 , Figure 5 and Figure 6As shown in this embodiment of the present invention, 6-8 nitrogen nozzles 201 are evenly provided below the nitrogen nozzle 2, the nitrogen nozzles 201 face upwards of the abrasive 3, and the upper part of the air inlet pipe 1 is made of flexible material. Through multiple nozzles, uniform nitrogen spraying is achieved.
[0034] like Figure 1 , Figure 5 and Figure 6 As shown in this embodiment of the utility model, a limiting rod 8 is fixed at the top of the support column 9 and the telescopic column. The outer wall of the limiting rod 8 is spaced 4-6mm from the inner side of the spring 7. A limiting head 801 is provided at the top of the limiting rod 8. The limiting head 801 is inserted into the connecting rod 6. The outer wall of the limiting head 801 is spaced 4-6mm from the bottom groove of the connecting rod 6 to avoid excessive vibration and damage. A buffer pad 12 is fixed between the telescopic rod 11 and the spring 7. The buffer pad 12 is made of rubber to reduce wear on the telescopic rod 11.
[0035] like Figure 2 and Figure 3 As shown in this embodiment of the present invention, there are two vibration motors 13, which are symmetrically arranged on the front and rear sides of the bottom of the grinding jar 4. Each vibration motor 13 includes an output motor 1302 and an eccentric swing block 1301. The output motor 1302 is fixed inside the vibration motor 13, and the eccentric swing block 1301 is fixed to the output shaft of the output motor 1302. By setting two vibration motors 13 with different frequencies, the grinding effect is improved.
[0036] like Figure 1 As shown in this embodiment of the utility model, a heat insulation layer 5 is fixed on the outside of the grinding jar 4. The heat insulation layer 5 includes a heat insulation inner layer of polyurethane foam and a protective outer layer made of aluminum plate, which reduces heat loss and protects the inner heat insulation layer through the protective outer layer.
[0037] like Figure 1 As shown in this embodiment of the present invention, one or more temperature sensors 17 are provided inside the grinding jar 4 to detect the temperature inside the grinding jar 4 and adjust the nitrogen gas intake according to the temperature. The temperature of the temperature sensor 17 can be displayed, and the intake valve of the intake pipe 1 can be manually adjusted to adjust the amount of nitrogen gas entering. The temperature sensor 17 is set with a threshold of -10 to 0℃ to control the nitrogen gas flow rate, which can be continuously adjusted to ensure a uniform temperature field (±5℃).
[0038] In the operation of this utility model, after the material is loaded through the discharge port 14, the telescopic rod 11 is raised and inserted into the closed baffle 1504. Low-temperature nitrogen gas is introduced through the air inlet pipe 1. When the temperature reaches the predetermined value of -10 to 0℃, the vibration motor 13 is started to make the material to be ground 3 evenly distributed. Then the telescopic rod 11 is reset to perform grinding. After sufficient grinding, the vibration motor 13 is turned off, the closed baffle 1504 is replaced with a perforated baffle 1501, the telescopic rod 11 is lowered, and the vibration motor 13 is started to facilitate material discharge.
[0039] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A high-purity powder preparation apparatus under low-temperature nitrogen protection, comprising a support and a grinding jar disposed above the support, wherein a vibration motor is fixed to the bottom of the grinding jar, and abrasive is placed inside the grinding jar, characterized in that: An air inlet pipe is fixed at the top center of the grinding jar, and an exhaust port is provided at the top of the grinding jar. A nitrogen spray pipe is fixed at the bottom of the air inlet pipe. A discharge port is provided on one side of the grinding jar. Two support columns and two telescopic rods are fixed above the support. Springs are fixed at the top of the support columns and telescopic rods. A connecting rod is fixed at the top of the springs. The connecting rod is hinged to the bottom of the grinding jar. The support columns are located below the grinding jar on the side away from the discharge port, and the telescopic rods are located below the grinding jar on the side closer to the discharge port.
2. The high-purity powder preparation apparatus under low-temperature nitrogen protection according to claim 1, characterized in that: A baffle is vertically inserted at the discharge port. There are two types of baffles: a perforated baffle with a hole in the middle and a sealed baffle with a closed middle. A retaining ring is fixed to the top of the baffle, and elastic limiting plates are fixed to the lower sides of both sides of the retaining ring. There is a gap between the elastic limiting plates and the side wall of the baffle. The retaining ring is snapped into the top of the discharge port. The elastic limiting plates and the retaining ring cooperate to fix the baffle at the discharge port. Rubber sealing gaskets are fixed to the contact sides of the elastic limiting plates and the retaining ring with the discharge port.
3. The high-purity powder preparation apparatus under low-temperature nitrogen protection according to claim 1, characterized in that: The nitrogen nozzle has 6-8 nitrogen nozzles evenly distributed below it, with the nitrogen nozzles facing upwards towards the abrasive. The upper part of the air inlet pipe is made of a flexible material.
4. The high-purity powder preparation apparatus under low-temperature nitrogen protection according to claim 1, characterized in that: The top of the support column and the telescopic column are fixed with a limit rod, and the outer wall of the limit rod is 4-6mm away from the inner side of the spring; the top of the limit rod is provided with a limit head, which is inserted into the connecting rod, and the outer wall of the limit head is 4-6mm away from the bottom groove of the connecting rod.
5. The high-purity powder preparation apparatus under low-temperature nitrogen protection according to claim 1, characterized in that: There are two vibration motors, symmetrically arranged on the front and rear sides of the bottom of the grinding jar. Each vibration motor includes an output motor and an eccentric swing block. The output motor is fixed inside the vibration motor, and the eccentric swing block is fixed to the output shaft of the output motor.
6. The high-purity powder preparation apparatus under low-temperature nitrogen protection according to claim 1, characterized in that: A buffer pad made of rubber is fixed between the telescopic rod and the spring connection.
7. The high-purity powder preparation apparatus under low-temperature nitrogen protection according to claim 1, characterized in that: The outside of the grinding jar is fixed with an insulation layer, which includes an inner insulation layer of polyurethane foam and a protective outer layer made of aluminum plate.
8. The high-purity powder preparation apparatus under low-temperature nitrogen protection according to claim 1, characterized in that: The abrasive consists of multiple titanium alloy grinding rods, and the inner lining of the grinding jar is made of titanium alloy. The hardness of the inner lining and the titanium alloy grinding rods is HV≥300.
9. The high-purity powder preparation apparatus under low-temperature nitrogen protection according to claim 1, characterized in that: One or more temperature sensors are installed inside the grinding jar.
10. The high-purity powder preparation apparatus under low-temperature nitrogen protection according to claim 1, characterized in that: A filter screen is threadedly connected to the exhaust vent.