Cooling and collecting device for metal powder production

Abstract

The utility model belongs to metal powder production technical field discloses a cooling collection device for metal powder production, including inertial separation room, the baffle is installed in inertial separation room, rotary cooling cavity, rotary cooling cavity is installed in the top of inertial separation room, the top of rotary cooling cavity is installed with hollow sealing ring, is installed with atomizing nozzle on hollow sealing ring, the inside installation of rotary cooling cavity has conical rotary screen, conical rotary screen is driven by driving piece, the outside of conical rotary screen is surrounded with spiral cooling pipe, both ends of spiral cooling pipe all are through rotary cooling cavity, powder collecting tank, powder collecting tank is linked up with inertial separation room and links together through the link pipeline. The utility model is through conical rotary screen dynamic screening to solve the problem of powder agglomeration caused by traditional static cooling in combination with spiral cooling pipe heat transfer enhancement, and the circumferential array design of atomizing nozzle ensures that cooling medium is evenly covered, can significantly improve powder sphericity and fluidity.

Description

Technical Field

[0001] This utility model relates to the field of metal powder production technology, and in particular to a cooling and collecting device for metal powder production. Background Technology

[0002] Cooling and collecting devices for metal powder production refer to systems or equipment used in the metal powder preparation process (such as atomization and reduction methods) to rapidly cool and efficiently collect high-temperature metal powders. Their core function is to immediately cool the powder after it forms, preventing particle adhesion, oxidation, or grain growth, and ensuring the powder is safely and without loss.

[0003] In the production of traditional metal powders (such as titanium alloys and aluminum alloys), the high-temperature molten metal needs to be rapidly cooled and collected after atomization. Existing technologies mostly use water cooling or direct cooling with inert gas, which has the following problems:

[0004] 1) Uneven cooling: Static cooling can easily cause powder particles to stick together and form irregular agglomerates;

[0005] 2) Low collection efficiency: Centrifugal separation and cooling are carried out in separate steps, resulting in large equipment size and high energy consumption. Therefore, we propose a cooling and collection device for metal powder production. Utility Model Content

[0006] In view of the problems of uneven cooling and low collection efficiency in the existing cooling collection devices, this utility model is proposed.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0008] A cooling and collecting device for metal powder production includes an inertial separation chamber, wherein staggered baffles are installed in the inertial separation chamber;

[0009] A rotating cooling chamber is installed on top of the inertial separation chamber and is connected to the inertial separation chamber. A hollow sealing ring is installed on the top of the rotating cooling chamber, and atomizing nozzles arranged in a circular array are installed on the hollow sealing ring. The hollow sealing ring is connected to an external pressurized water / air supply system through an input pipe. A conical rotating screen is coaxially installed inside the rotating cooling chamber. The conical rotating screen is driven by a drive component. A spiral cooling pipe surrounds the outside of the conical rotating screen. Both ends of the spiral cooling pipe penetrate the rotating cooling chamber, and the protruding parts are connected to an external liquid nitrogen or cooling water supply system.

[0010] The powder collection tank is connected to the inertial separation chamber via a connecting pipe.

[0011] As a technical solution of the cooling and collecting device for metal powder production described in this utility model, the upper surface of the baffle plate is inclined, and the inclined surface is coated with a ceramic wear-resistant layer.

[0012] As a technical solution of the cooling and collecting device for metal powder production described in this utility model, the mesh of the conical rotating screen is gradient distributed, the upper end of the conical rotating screen has a pore diameter of 50-100μm, and the lower end has a pore diameter of 10-20μm.

[0013] As a technical solution of the cooling and collecting device for metal powder production according to the present invention, the driving component includes a servo motor, a cross plate is installed in the rotating cooling chamber, the servo motor is installed on the cross plate, and the output shaft of the servo motor is connected to the small end of the conical rotating screen.

[0014] As a technical solution of the cooling and collecting device for metal powder production described in this utility model, the spiral of the spiral cooling pipe gradually decreases from bottom to top.

[0015] As a technical solution of the cooling and collecting device for metal powder production described in this utility model, an airlock valve is installed on the connecting pipe, and the airlock valve is connected to the connecting pipe.

[0016] As a technical solution of the cooling and collecting device for metal powder production described in this utility model, the powder collecting tank is connected to the inertial separation chamber through the connecting pipe and the air lock valve, and the tank body jacket of the powder collecting tank is filled with phase change cooling material.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] 1. This utility model solves the problem of powder agglomeration caused by traditional static cooling by using a conical rotating screen for dynamic screening combined with a spiral cooling tube to enhance heat exchange. At the same time, the circumferential array design of the atomizing nozzles ensures uniform coverage of the cooling medium, which can significantly improve the sphericity and flowability of the powder.

[0019] 2. This utility model simplifies the process by adopting inertial separation, rotary cooling and integrated powder collection design, reduces the equipment footprint, and at the same time, the synergy between the air lock valve and the phase change cooling material ensures powder quality, avoids energy waste in step-by-step processing and reduces overall energy consumption. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0021] Figure 1 This is a schematic diagram of the overall main structure of this utility model.

[0022] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0023] Figure 3 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0024] Figure 4 For the present utility model Figure 2 Enlarged structural diagram at point B.

[0025] Explanation of reference numerals in the attached figures:

[0026] In the diagram: 1. Inertial separation chamber; 101. Baffle plate; 2. Rotary cooling chamber; 201. Hollow sealing ring; 202. Atomizing nozzle; 203. Conical rotating screen; 204. Cross plate; 205. Servo motor; 206. Spiral cooling pipe; 3. Connecting pipe; 4. Airlock valve; 5. Powder collection tank; 501. Phase change cooling material. Detailed Implementation

[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0028] Reference Figures 1-4 A cooling and collecting device for metal powder production is provided. This cooling and collecting device for metal powder production includes an inertial separation chamber 1, in which staggered baffles 101 are installed. In application, gas-solid separation is achieved through the staggered baffles 101, and large particles of powder are initially screened.

[0029] A rotary cooling chamber 2 is installed on top of the inertial separation chamber 1 and is connected to the inertial separation chamber 1. A hollow sealing ring 201 is installed on the top of the rotary cooling chamber 2, and atomizing nozzles 202 arranged in a circular array are installed on the hollow sealing ring 201. The hollow sealing ring 201 is connected to an external pressurized water / air supply system through an input pipe. A conical rotary screen 203 is coaxially installed inside the rotary cooling chamber 2. The conical rotary screen 203 is driven by... Driven by a moving component, a spiral cooling pipe 206 surrounds the outer side of the conical rotating screen 203. Both ends of the spiral cooling pipe 206 penetrate the rotating cooling cavity 2, and the extended part is connected to an external liquid nitrogen or cooling water supply system. In application, the atomizing nozzle 202 sprays out the cooling medium (water or inert gas), which, combined with the dynamic sieving of the conical rotating screen 203, achieves uniform cooling and classification of powder. At the same time, liquid nitrogen or cooling water is introduced to enhance the heat exchange efficiency and solve the adhesion problem caused by static cooling.

[0030] The powder collection tank 5 is connected to the inertial separation chamber 1 via the connecting pipe 3. In application, the integrated design of the powder collection tank 5 reduces the size of the equipment and improves the continuity of the process.

[0031] Reference Figure 2 and Figure 4 The upper surface of the baffle 101 is set with an incline, and the incline is coated with a ceramic wear-resistant layer. In application, the incline design guides the powder to slide down and reduces accumulation. At the same time, the ceramic wear-resistant layer extends the service life of the baffle 101 and adapts to the high-temperature scouring of metal powder.

[0032] Reference Figure 2 and Figure 3 The conical rotary screen 203 has a gradient distribution of mesh openings. The upper end of the conical rotary screen 203 has an opening diameter of 50-100μm, and the lower end has an opening diameter of 10-20μm. In application, the larger opening diameter at the upper end (50-100μm) intercepts coarse powder, while the smaller opening diameter at the lower end (10-20μm) filters fine powder, thereby achieving automatic classification and collection of powder and avoiding manual sorting.

[0033] Reference Figure 2 and Figure 3 The driving components include a servo motor 205, and a cross plate 204 is installed inside the rotary cooling chamber 2. The servo motor 205 is mounted on the cross plate 204, and the output shaft of the servo motor 205 is connected to the small end of the conical rotary screen 203. In application, the cross plate 204 fixes the servo motor 205 to ensure stability, while the servo motor 205 precisely controls the rotation speed of the conical rotary screen 203 to adapt to the cooling requirements of different metal powders.

[0034] Reference Figure 2The spiral of the spiral cooling tube 206 gradually decreases from bottom to top. In application, the spiral structure that decreases from bottom to top increases the contact time between the cooling medium and the powder, thereby improving the cooling uniformity.

[0035] Reference Figure 2 and Figure 4 An airlock valve 4 is installed on the connecting pipe 3. The airlock valve 4 is connected to the connecting pipe 3. In application, it prevents external air from entering the powder collection tank 5 and avoids oxidation of metal powder (especially for active metals such as titanium / aluminum).

[0036] Reference Figure 2 and Figure 4 The powder collection tank 5 is connected to the inertial separation chamber 1 through the connecting pipe 3 and the air lock valve 4. The tank body of the powder collection tank 5 is filled with phase change cooling material 501. In application, the phase change cooling material 501 (such as paraffin / metal salt) in the tank body absorbs residual heat to achieve deep cooling and temperature stabilization of the powder.

[0037] The working principle of this utility model is as follows: Metal powder enters the rotary cooling chamber 2, and the atomizing nozzle 202 sprays the cooling medium. At the same time, the servo motor 205 fixed on the cross plate 204 is started. At this time, the output shaft of the servo motor 205 drives the conical rotary screen 203 to rotate. The upper end intercepts medium particles with a pore size of 50-100μm, and the liquid nitrogen spiral cooling pipe 206 quickly cools it to below 80℃. The lower end filters fine powder with a pore size of 10-20μm, which can further cool it to 50℃. Then the powder enters the inertial separation chamber 1 with the airflow. At this time, the baffle plate 101 intercepts metal particles through inertial collision. The powder slides down the inclined surface to the bottom for temporary storage. Then the air lock valve 4 is opened. At this time, the powder is transported through the connecting pipe 3. The air lock valve 4 blocks oxygen and maintains an argon atmosphere. At the same time, the phase change cooling material 501 in the powder collection tank 5 absorbs the residual heat and stabilizes the temperature inside the powder collection tank 5 at 25±3℃. The powder moisture content is <0.1%, which completes the cooling and collection of metal powder.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A cooling and collecting device for metal powder production, characterized by: include: An inertial separation chamber (1) is provided, wherein staggered baffles (101) are installed inside the inertial separation chamber (1); A rotating cooling chamber (2) is installed on the top of the inertial separation chamber (1) and is connected to the inertial separation chamber (1). A hollow sealing ring (201) is installed on the top of the rotating cooling chamber (2). Atomizing nozzles (202) arranged in a circular array are installed on the hollow sealing ring (201). The hollow sealing ring (201) is connected to an external pressurized water / air supply system through an input pipe. A conical rotating screen (203) is coaxially installed inside the rotating cooling chamber (2). The conical rotating screen (203) is driven by a driving component. A spiral cooling pipe (206) surrounds the outside of the conical rotating screen (203). Both ends of the spiral cooling pipe (206) penetrate the rotating cooling chamber (2) and the extended part is connected to an external liquid nitrogen or cooling water supply system. The powder collection tank (5) is connected to the inertial separation chamber (1) through the connecting pipe (3).

2. The cooling and collecting device for metal powder production according to claim 1, characterized in that: The upper surface of the baffle plate (101) is inclined, and the inclined surface is coated with a ceramic wear-resistant layer.

3. The cooling and collecting device for metal powder production according to claim 1, characterized in that: The conical rotating screen (203) has a gradient distribution of mesh openings, with the upper end of the conical rotating screen (203) having a mesh diameter of 50-100μm and the lower end having a mesh diameter of 10-20μm.

4. The cooling and collecting device for metal powder production according to claim 1, characterized in that: The driving component includes a servo motor (205), a cross plate (204) is installed inside the rotating cooling cavity (2), the servo motor (205) is mounted on the cross plate (204), and the output shaft of the servo motor (205) is connected to the small end of the conical rotating screen (203).

5. The cooling and collecting device for metal powder production according to claim 1, characterized in that: The spiral of the spiral cooling pipe (206) gradually decreases from bottom to top.

6. The cooling and collecting device for metal powder production according to claim 1, characterized in that: An airlock valve (4) is installed on the connecting pipe (3), and the airlock valve (4) is connected to the connecting pipe (3).

7. The cooling and collecting device for producing metal powder according to claim 6, characterized in that: The powder collection tank (5) is connected to the inertial separation chamber (1) through the connecting pipe (3) and the air lock valve (4), and the tank body interlayer of the powder collection tank (5) is filled with phase change cooling material (501).

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