Preparation equipment for aluminum alloy wear-resistant coating

Abstract

The invention relates to the technical field of metal powder processing, in particular to aluminum alloy wear-resistant coating preparation equipment which comprises an atomizer, a tundish installed at the top of the atomizer, a collecting chamber installed at the bottom of the atomizer, a plurality of nozzles installed at the top of an inner cavity of the atomizer and a water pump for supplying water to the nozzles. An opening allowing melt to pass through is formed between the tops of the intermediate inclusion atomizers, the nozzles face the inclined lower portion and are aligned with the melt dripping in the opening in a V shape, high-pressure water jet sprayed out of the nozzles decomposes the melt into molten liquid drops, the molten liquid drops are mixed with water to form a water-powder mixture after being cooled, and opening and closing doors are rotationally installed on the atomizers. An electromagnet penetrates through and is fixedly installed in the opening and closing door, a magnetic attraction piece is fixedly installed at the end, located in the atomizer, of the electromagnet, the magnetic attraction piece synchronously generates magnetic attraction force when the electromagnet is started to generate magnetic force, a liquid receiving barrel located under the opening is installed in an inner cavity of the atomizer, and a water outlet pipe is arranged on the side, facing the magnetic attraction piece, of the liquid receiving barrel.

Description

Technical Field

[0001] The invention relates to the technical field of metal powder processing, and in particular to equipment for preparing an aluminum alloy wear-resistant coating. Background Art

[0002] Iron-chromium-aluminum alloy wear-resistant coating is suitable for environments that need to withstand high temperature and wear due to its good high-temperature performance. The materials required for the preparation of iron-chromium-aluminum alloy wear-resistant coating include iron powder. Due to the different metal powder forming processes and subsequent application requirements, its preparation methods are very different. According to the preparation principle, it is mainly divided into physical and chemical methods and mechanical methods. The mechanical method includes mechanical crushing method and atomization method. Among them, the mechanical crushing method generally relies on crushing, grinding and grinding to crush the block metal into powder, while the atomization method is a method of directly crushing liquid metal to prepare powder. According to the medium and principle of crushing liquid metal, the atomization method can be divided into water atomization (WA), gas atomization (GA), ultrasonic atomization (UA), plasma atomization (PA), plasma spheroidization (PS) and centrifugal atomization (CA). These atomization technologies have their own characteristics and have been successfully applied to industrial production. Among them, water atomization has the advantages of simple production equipment and process, low energy consumption and large batch size, and has become the main industrial preparation method of metal powder.

[0003] like Figure 2 As shown, the basic principle of the existing water atomization is that after the metal raw material is melted in the furnace, the melt is poured into a tundish placed on the top of the atomizer, and the melt flows through the opening at the bottom of the tundish into the atomizer and is decomposed into molten droplets by the high-pressure water jet sprayed from the nozzle. The molten droplets cool and solidify during the falling and deposition to form powders that are mixed in the water to form a water-powder mixture. The water is circulated by the water pump to the nozzle to continue to be sprayed, and finally the water-powder mixture is dehydrated, dried and collected;

[0004] As production progresses, the percentage of iron powder in the water gradually increases. When it reaches a certain value, it will affect the service life of the nozzle. At the same time, when the iron powder is flushed by the melt with water, a certain amount of melt will adhere to the surface of the formed iron powder, causing the diameter of some iron powder to become larger, affecting product quality. For this reason, when the production time is scheduled, it is necessary to stop the machine for a certain period of time to take out the water-powder mixture in the collection chamber for dehydration, drying and collection, affecting production efficiency.

[0005] The above information disclosed in this Background section is only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not constitute the prior art that is already known to one of ordinary skill in the art. Summary of the invention

[0006] The purpose of the present invention is to design a device that slows down the growth rate of the percentage of iron powder in circulating water, increases the service life of the nozzle and the product quality, and improves production efficiency, so as to solve the above-mentioned shortcomings in the technology.

[0007] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a preparation device for aluminum alloy wear-resistant coating, comprising an atomizer, a tundish installed on the top of the atomizer, a collection chamber installed at the bottom of the atomizer, a plurality of nozzles installed on the top of the inner cavity of the atomizer, and a water pump for supplying water to the nozzles, an opening for the melt to pass through is provided between the tundish and the top of the atomizer, the nozzle is V-shaped and aimed at the melt dripping in the opening obliquely downward, the high-pressure water jet sprayed from the nozzle decomposes the melt into molten droplets, and the molten droplets are mixed with water to form a water-powder mixture after cooling, a switch door is rotatably installed on the atomizer, an electromagnet is penetrated and fixedly installed in the switch door, a magnetic attraction is fixedly installed at the end of the electromagnet located in the atomizer, and when the electromagnet is turned on to generate magnetic force, the magnetic attraction synchronously generates magnetic attraction, a liquid receiving bucket located directly below the opening is installed in the inner cavity of the atomizer, and the liquid receiving bucket has a water outlet pipe on the side facing the magnetic attraction, and the water-powder mixture sprayed from the nozzle is aimed at the inner cavity of the liquid receiving bucket;

[0008] The water-powder mixture flows from the liquid receiving barrel to the magnetic suction part with magnetic attraction through the water outlet pipe, the iron powder in the water-powder mixture is adsorbed on the magnetic suction part, and the water flows into the collection chamber and is pumped to the nozzle for spraying.

[0009] Preferably, the magnetic attraction component includes a connecting plate fixedly connected to the end of the electromagnet, and an array of connecting needles fixedly connected to the side of the connecting plate. When the electromagnet is turned on, both the connecting needles and the connecting plate have magnetic attraction. A plurality of connecting needles are provided to form a magnetic attraction space of a certain volume to increase the adsorption amount of iron powder. In addition to being used to fix the connecting needles, the connecting plate also serves a certain magnetic attraction purpose.

[0010] Preferably, the connecting plate is designed to be arc-shaped, and the connecting needles are evenly distributed on the concave side of the connecting plate; the arc-shaped connecting plate is used to adapt to the cylindrical atomizer.

[0011] Preferably, the number of the water outlet pipes is set to be multiple and distributed in an array, and the central axis of the water outlet pipe array coincides with the central axis of the connecting plate; the multiple water outlet pipes can not only guide the water-powder mixture in the liquid storage barrel to the connecting needle and the connecting plate, but also divert the water-powder mixture to reduce the impact of the water-powder mixture on the connecting needle, avoid scouring the iron powder adsorbed on the hanging connecting needle, and at the same time evenly guide the water-powder mixture to the connecting needle.

[0012] Preferably, a tripod is fixedly installed in the inner cavity of the atomizer, a receiving tray is fixedly installed on the top of the tripod, and the liquid receiving bucket is detachably connected to the receiving tray; the tripod and the receiving tray are used to install the liquid receiving bucket directly below the multiple nozzles.

[0013] Preferably, the collecting chamber is configured as a long strip as a whole, a first plate is fixedly mounted on the top of the collecting chamber, and a second plate is fixedly mounted on the bottom of the collecting chamber, and the first plate and the second plate divide the inner cavity of the collecting chamber into an S-shaped channel.

[0014] Preferably, a filter screen is fixedly connected to the inner cavity of the collecting chamber away from one end of the atomizer, and the filter screen is fixedly connected to the first plate. A filter chamber is formed between the collecting chamber, the filter screen and the first plate. A water inlet pipe connected to the filter chamber is fixedly installed on the top of the collecting chamber, and the water pump input end is fixedly connected to the end of the water inlet pipe.

[0015] Preferably, a sealing door is detachably connected to the outer wall of the collecting chamber, and the sealing door is communicated with the inner cavity of the atomizer; the sealing door is convenient to open and clean the water-powder mixture in the collecting chamber as in the prior art.

[0016] In the above technical solution, the technical effects and advantages provided by the present invention are:

[0017] 1. This equipment guides the water mixture to the connecting plate and the connecting needle first, and uses the magnetic force generated by the electromagnet to absorb the iron powder in the water mixture first, so that only water in the water mixture flows into the collection chamber, which solves the problem in the prior art that the percentage of iron powder in water gradually increases with the progress of production, affecting product quality and nozzle service life;

[0018] 2. As the production of this product proceeds, only when the iron powder on the connecting plate and the connecting needle is adsorbed to a certain thickness, will the iron powder flow into the collection chamber along with the water. Compared with the rate of increase of the percentage of iron powder in water in the prior art, the growth rate is slowed down, thereby increasing the interval of stopping the machine to process the water mixture in the collection chamber and improving production efficiency;

[0019] 3. After the equipment has worked for a predetermined time, the switch door can be directly opened and the electromagnet can be closed to allow the iron powder adsorbed on the connecting needle and the connecting plate to fall into the external collection frame, and then the electromagnet can be started to close the switch door to continue the production of iron powder. Compared with the prior art in which the equipment has to stop for a long time to clean the water mixture in the collection chamber before continuing production, the operation speed is fast, the downtime is short, and the production efficiency is improved;

[0020] 4. At the same time, the device redesigns the collection chamber so that when the water-powder mixture flows into the filter chamber in the S-shaped channel, some iron powder will remain on one side of the second plate, thereby reducing the filtering pressure of the filter screen and making the water sprayed from the nozzle not contain a small amount of iron powder like the prior art, thereby improving the service life of the nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is the principle diagram of the existing water atomization equipment;

[0024] Figure 3 This is a schematic diagram of the opening of the switch door of the present invention;

[0025] Figure 4 It is a schematic diagram of the internal structure of the collection chamber of the present invention;

[0026] Figure 5 It is a schematic diagram of the internal structure of the atomizer of the present invention;

[0027] Figure 6 It is a schematic diagram of the positions of the liquid receiving bucket and the magnetic suction piece of the present invention.

[0028] Description of reference numerals:

[0029] 1. Atomizer; 2. Tundish; 3. Collecting chamber; 4. Nozzle; 5. Water pump; 6. Switch door; 7. Electromagnet; 8. Magnetic element; 8a. Connecting plate; 8b. Connecting needle; 9. Liquid collecting bucket; 10. Water outlet pipe; 11. Tripod; 12. Receiver plate; 13. First plate; 14. Second plate; 15. Filter screen; 16. Filter chamber; 17. Water inlet pipe; 18. Sealing door. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] The present invention provides Figure 1-6The preparation equipment of an aluminum alloy wear-resistant coating shown in the figure comprises an atomizer 1, a tundish 2 installed on the top of the atomizer 1, a collecting chamber 3 installed at the bottom of the atomizer 1, a plurality of nozzles 4 installed on the top of the inner cavity of the atomizer 1, and a water pump 5 to supply water to the nozzles 4. An opening for the melt to pass through is provided between the tundish 2 and the top of the atomizer 1. The nozzle 4 is V-shaped and aimed at the melt dripping in the opening obliquely downward. The high-pressure water jet sprayed by the nozzle 4 decomposes the melt into molten droplets, which are mixed with water to form a water-powder mixture after cooling. A switch door 6 is rotatably installed on the atomizer 1. An electromagnet 7 is penetrated and fixedly installed in the switch door 6. A magnetic attraction part 8 is fixedly installed at the end of the electromagnet 7 located in the atomizer 1. The magnetic attraction part 8 comprises an arc-shaped connecting plate 8a fixedly connected to the end of the electromagnet 7, and an array of connecting needles 8b fixedly connected to the side of the connecting plate 8a. The wire of the electromagnet 7 is wrapped with an insulating object, such as an insulating skin. When the electromagnet 7 is turned on to generate magnetic force, the magnetic attraction part 8 is fixedly installed. The suction piece 8 generates magnetic attraction synchronously, the inner cavity of the atomizer 1 is equipped with a liquid receiving bucket 9 located just below the opening, and the liquid receiving bucket 9 has a plurality of water outlet pipes 10 on the side facing the magnetic suction piece 8, and the water-powder mixture sprayed by the nozzle 4 is aimed at the inner cavity of the liquid receiving bucket 9, and the inner cavity of the atomizer 1 is fixedly equipped with a tripod 11, and a receiving plate 12 is fixedly installed on the top of the tripod 11, and the liquid receiving bucket 9 and the receiving plate 12 are detachably connected, and the collecting chamber 3 is configured as a long strip as a whole, and a first plate 13 is fixedly installed on the top of the collecting chamber 3. A second plate 14 is fixedly installed at the bottom of the collecting chamber 3, and the first plate 13 and the second plate 14 divide the inner cavity of the collecting chamber 3 into an S-shaped channel. A filter screen 15 is fixedly connected to one end of the inner cavity of the collecting chamber 3 away from the atomizer 1, and the filter screen 15 is fixedly connected to the first plate 13. A filter chamber 16 is formed between the collecting chamber 3, the filter screen 15 and the first plate 13. A water inlet pipe 17 connected to the filter chamber 16 is fixedly installed on the top of the collecting chamber 3, and the input end of the water pump 5 is fixedly connected to the end of the water inlet pipe 17;

[0033] During operation, the iron raw material is melted in the furnace to form a melt which is poured into the tundish 2, and then flows through the opening at the bottom of the tundish 2 into the atomizer 1. The melt is decomposed into molten droplets by the high-pressure water jet sprayed from the nozzle 4 as it flows down. The molten droplets cool and solidify during the falling and sedimentation to form powders which are mixed in the water to form a water-powder mixture. The water-powder mixture impacts the liquid receiving barrel 9 to release the impact force when it is sprayed from the nozzle 4, and fills the liquid receiving barrel 9. When the liquid level in the liquid receiving barrel 9 reaches a certain height, the water-powder mixture will slowly flow to the connecting needle 8b and the connecting plate 8a through the water outlet pipe 10. Since the connecting plate 8a and the connecting needle 8b generate magnetic force when the electromagnet 7 is turned on, the iron powder in the water-powder mixture will be adsorbed on the connecting plate 8a and the connecting needle 8b after the water-powder mixture contacts the connecting needle 8b and the connecting plate 8a, and only water flows into the collecting chamber 3.

[0034] As the production proceeds, when the thickness of the iron powder adsorbed on the connecting plate 8a and the connecting needle 8b reaches a certain thickness, a small amount of iron powder will flow into the collecting chamber 3 along with the water, and then pass through the S-shaped channel. Each time the water passes through the second plate 14 with the iron powder, some of the iron powder will not cross the second plate 14 and flow to the filter chamber 16, so that the amount of iron powder under the filter screen 15 is less than that at the bottom of the atomizer 1, thereby relieving the filtering pressure of the filter screen 15, and the water pump 5 extracts water without iron powder from the filter chamber 16 and injects it into the nozzle 4;

[0035] After the equipment has been running for a predetermined time, if the melt in the tundish 2 is used up, the operator opens the switch door 6, and then places a collection frame for collecting iron powder under the connecting plate 8a and the connecting needle 8b. After closing the electromagnet 7, the connecting plate 8a and the connecting needle 8b lose their magnetic attraction, and the iron powder originally adsorbed on the connecting needle 8b and the connecting plate 8a falls into the collection frame under the action of gravity. At this time, some iron powder will adhere to the connecting plate 8a and the connecting needle 8b. If it is necessary to continue to produce iron powder, turn on the electromagnet 7 again, close the switch door 6 and continue production according to the existing process; if it is necessary to produce other metals that can be adsorbed by magnets, use the external nozzle 4 to clean the iron powder adhering to the connecting plate 8a and the connecting needle 8b into the collection frame, remove the liquid receiving barrel 9 from the receiving tray 12 and replace it with a new receiving tray 12, and replace or clean the tundish 2 according to the method in the prior art.

[0036] It is important to note that the construction and arrangement of the present application shown in a number of different exemplary embodiments are exemplary only. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, changes in orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application.

Claims

1. A preparation device for aluminum alloy wear-resistant coating, comprising an atomizer (1), a tundish (2) installed on the top of the atomizer (1), a collecting chamber (3) installed at the bottom of the atomizer (1), a plurality of nozzles (4) installed on the top of the inner cavity of the atomizer (1), and a water pump (5) for supplying water to the nozzles (4), wherein an opening for a melt to pass through is provided between the tundish (2) and the top of the atomizer (1), the nozzle (4) is directed in a V-shape downwardly toward the melt dripping from the opening, and a high-pressure water jet ejected from the nozzle (4) decomposes the melt into molten droplets, which are mixed with water to form a water-powder mixture after being cooled, characterized in that: The atomizer (1) is rotatably mounted with a switch door (6), the switch door (6) is penetrated by and fixedly mounted with an electromagnet (7), the end of the electromagnet (7) located in the atomizer (1) is fixedly mounted with a magnetic attraction member (8), when the electromagnet (7) is turned on to generate magnetic force, the magnetic attraction member (8) generates magnetic attraction force synchronously, the inner cavity of the atomizer (1) is mounted with a liquid receiving bucket (9) located directly below the opening, the liquid receiving bucket (9) has a water outlet pipe (10) on the side facing the magnetic attraction member (8), and the water-powder mixture sprayed by the nozzle (4) is aligned with the inner cavity of the liquid receiving bucket (9); The water-powder mixture flows from the liquid receiving bucket (9) to the magnetic attraction member (8) having magnetic attraction force through the water outlet pipe (10), and the iron powder in the water-powder mixture is adsorbed on the magnetic attraction member (8). The water flows into the collection chamber (3) and is pumped by the water supply pump (5) to the nozzle (4) for spraying.

2. The preparation equipment of an aluminum alloy wear-resistant coating according to claim 1, characterized in that: The magnetic attraction member (8) comprises a connecting plate (8a) fixedly connected to the end of the electromagnet (7), and connecting pins (8b) distributed in an array and fixedly connected to the side of the connecting plate (8a); when the electromagnet (7) is turned on, both the connecting pins (8b) and the connecting plate (8a) have magnetic attraction.

3. The preparation equipment of an aluminum alloy wear-resistant coating according to claim 2, characterized in that: The connecting plate (8a) is designed to be arc-shaped, and the connecting needles (8b) are distributed at equal distances on the concave side of the connecting plate (8a).

4. The preparation equipment of the aluminum alloy wear-resistant coating according to claim 3 is characterized in that: The number of the water outlet pipes (10) is set to be multiple and distributed in an array, and the central axis of the water outlet pipes (10) distributed in the array coincides with the central axis of the connecting plate (8a).

5. The preparation equipment of an aluminum alloy wear-resistant coating according to claim 1, characterized in that: A stand (11) is fixedly mounted in the inner cavity of the atomizer (1), a receiving plate (12) is fixedly mounted on the top of the stand (11), and the liquid receiving bucket (9) is detachably connected to the receiving plate (12).

6. The preparation equipment of an aluminum alloy wear-resistant coating according to claim 1, characterized in that: The collecting chamber (3) is configured as a long strip as a whole, a first plate (13) is fixedly mounted on the top of the collecting chamber (3), and a second plate (14) is fixedly mounted on the bottom of the collecting chamber (3), and the first plate (13) and the second plate (14) divide the inner cavity of the collecting chamber (3) into an S-shaped channel.

7. The preparation equipment of the aluminum alloy wear-resistant coating according to claim 6, characterized in that: A filter screen (15) is fixedly connected to one end of the inner cavity of the collection chamber (3) away from the atomizer (1); the filter screen (15) is fixedly connected to the first plate (13); a filter chamber (16) is formed between the collection chamber (3), the filter screen (15) and the first plate (13); a water inlet pipe (17) connected to the filter chamber (16) is fixedly installed on the top of the collection chamber (3); and the input end of the water pump (5) is fixedly connected to the end of the water inlet pipe (17).

8. The preparation equipment of the aluminum alloy wear-resistant coating according to claim 1, characterized in that: The outer wall of the collection chamber (3) is detachably connected to a sealing door (18), and the sealing door (18) is in communication with the inner cavity of the atomizer (1).

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