Collector for preparing superfine metal powder through evaporation and condensation method

Abstract

The utility model relates to the technical field of superfine metal powder preparation, in particular to a collector for preparing superfine metal powder through an evaporation condensation method, which comprises a closed bin body, and a gas pulse back flushing device, a gas-solid separation filter pipe and a collecting bin are sequentially arranged in the closed bin body from top to bottom. A cooling jacket is arranged on the periphery of the closed bin body, differential pressure gauges are installed at the upper position and the lower position of the filter pipe, a scraper is installed in the collecting bin, a vibrator is installed on the wall of the collecting bin, and an automatic valve is installed at the bottom of the collecting bin. The collector gas pulse blowback device, the scraping plate, the vibrator and the automatic valve are all controlled by a PLC (Programmable Logic Controller); and the PLC is communicated with the filter pipe differential pressure gauge. Manual operation is replaced, automation of workshop equipment is achieved, labor is greatly saved, labor cost is reduced, and production efficiency and system stability are effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ultra-fine metal powder preparation, and particularly relates to an intelligent collector for preparing ultra-fine metal powder by evaporation condensation method. Background Art

[0002] The evaporation condensation method is an effective method for preparing ultra-fine metal powder. This method mainly utilizes evaporation and rapid solidification technologies. The raw materials are fed into the evaporator by a metal feeder to be evaporated into vapor. The metal vapor is carried by gas and sprayed into a quench tube. The quench tube quickly cools the vapor to form metal powder, which is then deposited into a collector before coalescence. An air-solid separation filter tube is provided in the collector to separate the powder from the gas. By blowing inert gas reversely through gas pulse backwashing, the powder can be blown off and collected from the collector, thereby obtaining ultra-fine metal powder.

[0003] The following problems have been found in the use of existing collectors:

[0004] (1) During the preparation process by evaporation condensation method, after the particulate powder is inhaled into the collector through physical vapor condensation by the quench tube, the powder temperature is too high. When the powder temperature is too high, it will form aggregates when passing through the filter tube. Once the powder forms aggregates, it will appear in flakes and the quality is unqualified.

[0005] (2) It is necessary to manually turn on the gas pulse backwashing. During the backwashing process, the pressure is low and unstable, resulting in a high pressure in the powder regeneration system of the filter tube. A high pressure will cause the entire system to malfunction and cannot operate normally.

[0006] (3) When manually operating the collector, a person stands on the top of the collector to operate the bucket rod of the collector to rotate forward and backward in a cycle, and manually uses an iron rod to knock on the collector to make the powder inside enter the material receiving pocket. There are certain safety hazards. The manual rotation and knocking force is weak, resulting in incomplete entry of the particulate powder into the material receiving pocket. Summary of the Utility Model

[0007] In order to overcome the deficiencies of the prior art, the utility model provides a collector for preparing ultra-fine metal powder by evaporation condensation method, which does not require manual operation, effectively improves the collection work efficiency and the stability of the process, and improves the product quality.

[0008] To achieve the above object, the utility model adopts the following technical solutions:

[0009] A collector for preparing ultrafine metal powder by evaporation condensation method. The collector is sequentially connected with a pre - placed high - temperature evaporator and a particle forming controller (quench tube). The collector includes a sealed chamber body. Inside the sealed chamber body, a gas pulse back - blowing device, a gas - solid separation filter tube, and a collection bin are arranged in sequence from top to bottom. A cooling jacket is arranged around the sealed chamber body. A differential pressure gauge is installed at the upper and lower positions of the filter tube. A scraper is installed in the collection bin, a vibrator is installed on the wall of the collection bin, and an automatic valve is installed at the bottom of the collection bin. The gas pulse back - blowing device, the scraper, the vibrator, and the automatic valve of the collector are all controlled by a PLC controller, and the PLC controller is connected to the differential pressure gauge of the filter tube.

[0010] Preferably, the sealed chamber body is of a conical structure.

[0011] Preferably, the sealed chamber body is of a metal skin structure, and a cooling metal interlayer is further arranged around the outside of the metal skin. Cold water is introduced into the cooling interlayer for water - cooling temperature reduction.

[0012] Preferably, the scraper is a triangular scraper, which can clean the particle powder on the inner wall of the collector.

[0013] Preferably, the scraper is driven by a driver. The driver is arranged at the top of the collector. A rotating rod is installed at the top of the scraper, a rotating gear is installed on the rotating rod, the driver is connected to a transmission gear, and the transmission gear is engaged with the rotating gear.

[0014] Preferably, the driver is a speed - regulating motor.

[0015] Preferably, the vibrator is a pneumatic hammer.

[0016] Preferably, the automatic valve is an electric ball valve.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] The cooling jacket arranged in the collector of the present utility model can quickly reduce the temperature of the particle powder in the collector; the differential pressure gauges arranged at the upper and lower parts of the filter tube can timely monitor the pressure value during the back - blowing process. Through PLC - controlled automatic pressurized gas pulse back - blowing, the regenerated powder on the filter tube is discharged, preventing the gas pulse back - blowing operation from stopping due to unstable pressure in the filter tube, and enabling the entire system to operate stably.

[0019] The triangular scraper is cycled to rotate forward and backward to clean the inner wall of the collector by sending instructions from the PLC. The PLC issues instructions to open the automatic valve and start the vibrator to knock on the collector, so that the particle powder inside is sent into the material receiving pocket at the bottom of the collector. The present utility model replaces manual operation, realizes the automation of workshop equipment, greatly saves labor, reduces labor costs, and effectively improves production efficiency and system stability. Brief Description of the Drawings

[0020] Figure 1 is a schematic cross-sectional structure diagram of the present utility model.

[0021] In the figure: 1. Sealed bin body; 2. Cooling jacket; 3. Gas pulse backwashing device; 4. Gas-solid separation filter tube; 5. Triangular scraper; 6. Differential pressure gauge; 7. Differential pressure gauge; 8. Pneumatic hammer; 9. Electric ball valve; 10. Material receiving hopper; 11. Speed-regulating motor; 12. Driving gear; 13. Rotating gear; 14. Rotating rod. Detailed Embodiment

[0022] To further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined utility model purpose, the following, in conjunction with the drawings and preferred embodiments, details the specific embodiments, structures, features and their effects of the present utility model as follows.

[0023] As Figure 1 shown, a collector for preparing ultrafine metal powder by evaporation condensation method of the present utility model includes a sealed bin body 1, and a cooling jacket 2 is arranged around the sealed bin body; a gas pulse backwashing device 3, a gas-solid separation filter tube 4 and a collecting bin are sequentially arranged in the sealed bin body 1 from top to bottom, and differential pressure gauges 6 and 7 are respectively installed at the upper and lower positions of the gas-solid separation filter tube 4; a triangular scraper 5 is installed in the collecting bin, a speed-regulating motor 11 is installed at the top of the collector, the speed-regulating motor 11 is connected to a driving gear 12, the driving gear 12 is in tooth engagement with a rotating gear 13 installed on a rotating rod 14, and the rotating rod 14 is connected to the triangular scraper 5, and the triangular scraper 5 is driven by the speed-regulating motor 11 to rotate on the inner wall of the collecting bin, so as to clean the metal powder on the inner wall; a pneumatic hammer 8 is installed on the wall of the collecting bin to knock on the collecting bin, so that the cleaned metal powder can quickly fall; an electric ball valve 9 is installed at the bottom of the collecting bin, and the electric ball valve 9, the pneumatic hammer 8, the speed-regulating motor 11 and the gas pulse backwashing device 3 are all controlled by a PLC controller.

[0024] Specific working process:

[0025] 1. The ultrafine metal powder forms particulate powder through a quench tube, and then the particulate powder is inhaled into the collector through the quench tube by physical vapor condensation method, and the temperature of the particulate powder in the collector is quickly reduced by the cooling jacket 2.

[0026] 2. Set the cleaning time regularly through the control room touch screen. When the time point arrives, the PLC sends an instruction signal to start the gas pulse backwashing, so that the particulate powder on the gas-solid separation filter tube 4 is blown into the collecting bin. When the differential pressure gauge of the filter tube shows the pressure value and the displayed pressure does not reach a certain value, the gas pulse backwashing is automatically pressurized to prevent solid powder from being caused by unstable pressure in the filter tube.

[0027] 3. After the gas pulse backwashing operation stops after 5 minutes, the PLC sends an instruction to start the speed-regulating motor 11 to drive the rotating rod 14 and the triangular scraper 5 to circulate forward and reverse to clean the inner wall of the collector; the PLC issues an instruction to open the electric ball valve 9 and start the pneumatic hammer 8 to strike the collecting bin so that the granular powder inside is sent into the material receiving pocket 10.

[0028] 4. When the time point arrives, the limit switch sends a signal to the PLC. The PLC sends a stop instruction to the speed-regulating motor and the pneumatic hammer, and then issues a closing instruction to the electric ball valve.

[0029] The above is only a preferred embodiment of the present invention, and does not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the above-disclosed technical content without departing from the technical solution scope of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A collector for preparing ultrafine metal powder by evaporation condensation method, the collector is sequentially communicated with a pre-set high-temperature evaporator and a quench tube, the collector includes a sealed chamber body, and a gas pulse back-blowing device, a gas-solid separation filter tube, and a collection bin are sequentially arranged in the sealed chamber body from top to bottom, and it is characterized in that: The sealed bin body is provided with cooling jackets around it. Differential pressure gauges are installed at the upper and lower positions of the filter pipes. A scraper is installed in the collecting bin, a vibrator is installed on the wall of the collecting bin, and an automatic valve is installed at the bottom of the collecting bin. The gas pulse back-blowing device, scraper, vibrator, and automatic valve of the collector are all controlled by a PLC controller, and the PLC controller is connected to the differential pressure gauge of the filter pipe.

2. The collector for preparing ultrafine metal powder by evaporation condensation method according to claim 1, characterized in that: The sealed bin body is of a conical structure.

3. The collector for preparing ultrafine metal powder by evaporation condensation method according to claim 1 or 2, characterized in that: The sealed bin body is of a metal skin structure, and a layer of cooling metal interlayer is further provided around the outside of the metal skin. Cold water is introduced into the cooling interlayer for water-cooling temperature reduction.

4. The collector for preparing ultrafine metal powder by evaporation condensation method according to claim 1, characterized in that: The scraper is a triangular scraper.

5. The collector for preparing ultrafine metal powder by evaporation condensation method according to claim 1 or 4, characterized in that: The scraper is driven by a driver. The driver is arranged at the top of the collector. A rotating rod is installed at the top of the scraper, a rotating gear is installed on the rotating rod, the driver is connected to a transmission gear, and the transmission gear is engaged with the rotating gear.

6. The collector for preparing ultrafine metal powder by evaporation condensation method according to claim 5, characterized in that: The driver is a speed-regulating motor.

7. The collector for preparing ultrafine metal powder by evaporation condensation method according to claim 1, wherein: The vibrator is a pneumatic hammer.

8. The collector for preparing ultrafine metal powder by evaporation condensation method according to claim 1, characterized in that: The automatic valve is an electric ball valve.

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