Atomizing nozzle device capable of being finely adjusted and used for preparing superfine powder

Abstract

The utility model discloses a finely adjustable atomizing nozzle device for preparing superfine powder, which belongs to the technical field of powder preparation devices and is characterized in that a liquid inlet is arranged at the upper part of a nozzle body, a liquid conveying pipeline is arranged at the lower part of the nozzle body, and a liquid flow adjusting valve is arranged at the joint of the liquid inlet and the liquid conveying pipeline; a plurality of clamping grooves are formed in the inner wall of the liquid conveying pipeline, and a baffle is detachably mounted on each clamping groove; a gas channel of a valve structure is arranged on the outer side of the lower end of the liquid conveying pipeline. And at least one ultrasonic device is arranged below the liquid conveying pipeline. According to the gas atomization device, firstly, the diversified baffles are used for primarily crushing molten metal, the gas atomization condition is effectively improved, and the gas atomization process is more sufficient. After gas atomization primary crushing, a non-contact ultrasonic technology is introduced, secondary crushing is conducted on molten metal, particles are further refined, the atomization efficiency is remarkably improved, and therefore superfine powder with the uniform particle size can be better prepared.

Description

TECHNICAL FIELD

[0001] The utility model relates to powder preparation device technical field, and specifically speaking to a preparation superfine powder's atomizing nozzle device of fine adjustment. BACKGROUND

[0002] The core of atomization powder preparation is to break the molten metal into small droplets by high-speed airflow, centrifugal force or other energy forms, and then the droplets are quickly solidified in the cooling medium (such as gas or liquid) to form powder. According to the different atomization media, atomization powder preparation can be divided into the following categories, among which gas atomization powder preparation is to break the molten metal stream into small droplets by high-speed airflow, and then these droplets are quickly cooled and solidified in the flight process to form metal powder. The core lies in the interaction between high-speed airflow and molten metal, which disperses the metal stream into small particles by the kinetic energy of the airflow. Gas atomization has shown significant advantages in the powder industry, but it still faces the problem of insufficient liquid breaking, which may result in large droplets or even liquid flow, making the liquid breaking effect poor and thus the atomization effect poor.

[0003] Therefore, in order to further improve the atomization effect and make the liquid more fully pretreated before atomization, it is an urgent technical problem for those skilled in the art to provide an atomizing nozzle device for preparing superfine powder with fine adjustment, which is provided with baffles in the liquid falling path. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing an atomizing nozzle device for preparing superfine powder with fine adjustment, which is beneficial to the rapid breaking of the metal stream in the early stage and provides convenience for the secondary breaking of gas atomization. This device not only can realize the preparation of superfine powder, but also can realize fine control. By changing the number of layers, shape, angle of the baffle and liquid flow regulating valve, the working parameters of the nozzle can be flexibly adjusted according to different liquid characteristics (such as viscosity, surface tension, etc.) and atomization requirements, so as to realize the best atomization effect.

[0005] Therefore, one object of the utility model is to provide an atomizing nozzle device for preparing superfine powder with fine adjustment, which comprises a nozzle body;

[0006] Among them, the upper part of the nozzle body is provided with a liquid inlet, and the lower part of the nozzle body is a liquid conveying pipeline, and a liquid flow regulating valve is arranged at the connection between the liquid inlet and the liquid conveying pipeline. In the utility model, the liquid inlet is located at the upper part of the nozzle, which is designed as a tapered structure, so that the flow rate of the entering liquid gradually increases under the action of pressure, and the liquid can impact the baffle more powerfully. At the same time, the flow regulating valve is arranged at the liquid inlet, which can accurately control the liquid flow according to the actual demand.

[0007] The inner wall of the liquid conveying pipeline is provided with a plurality of clamping grooves, and a baffle is detachably installed on each clamping groove; in the utility model, the baffle is installed in the nozzle through a special clamping groove and clamping block structure, and is convenient to disassemble and replace. The clamping groove is designed on the inner wall of the nozzle, the clamping block is fixed on the edge of the baffle, the baffle clamping block is inserted into the clamping groove in alignment during installation, and then a certain angle is rotated to fix it. Different baffle shapes produce different effects and are applied in different scenes.

[0008] The lower outer side of the liquid conveying pipeline is provided with a gas channel of a Laval structure.

[0009] The lower side of the liquid conveying pipeline is provided with at least one ultrasonic device.

[0010] In the utility model, the annular gas channel is arranged around the baffle area in the nozzle, gas is connected from the external high-pressure gas source, and is uniformly distributed through the annular channel. At the intersection of the annular channel and the liquid falling path, a gas channel of a Laval structure is arranged according to the principle of gas dynamics, which is a zooming structure composed of a converging section, a throat and an expanding section. According to the continuity equation and Bernoulli's principle (formula one) and (formula two), when the gas flows in the converging section, the gas flow rate gradually increases with the decrease of the flow area, and the pressure and temperature correspondingly decrease. This process gradually converts the pressure energy of the gas into kinetic energy, laying a foundation for the subsequent sound velocity in the throat. When the high-pressure gas enters the converging section of the Laval structure, the gas is compressed and accelerated, and the flow rate continuously increases. In the throat, the gas reaches the sound velocity. After entering the expanding section, due to the compressibility of the gas and the special structure of the Laval tube, the gas continues to expand, the pressure continuously decreases, and the flow rate further increases to supersonic speed. This supersonic gas flow is sprayed out of the nozzle at high speed, interacts with the metal liquid flow, and uses the powerful impact force to break the metal liquid flow into small droplets. These droplets quickly cool and solidify during flight, and finally form metal powder.

[0011]

[0012] (wherein, p is the density of the fluid, t is time, u, v, w are the velocity components of the fluid in x, y, z directions respectively.)

[0013] p+1 / 2ρv 2 +ρgh=C (two)

[0014] (wherein, p is the pressure of a point in the fluid, p is the density of the fluid, v is the flow rate of the fluid at the point, h is the height of the point relative to a certain reference surface, and C is a constant).

[0015] Further, the nozzle body is of ceramic material or a material with super-liquid-repellent surface.

[0016] The beneficial effect of adopting the further scheme is that the nozzle can adopt two materials, can adopt ceramic material, has good wear resistance and chemical stability, can keep stable performance under long-term contact with liquid and high-speed airflow impact, reduces structural damage caused by wear and corrosion, thereby guaranteeing the stability of the atomization effect; the material of the super-liquid-repellent surface can prevent liquid from adhering and accumulating on the nozzle surface, reduce the plugging phenomenon, and improve the stability and service life of the nozzle.

[0017] Further, the baffle is a rectangular, triangular or arc-shaped baffle.

[0018] Further, the baffle forms an angle of 15-45 degrees with the horizontal direction downward.

[0019] The beneficial effect of adopting the further scheme is that the nozzle in the middle atomization area is provided with multiple layers of baffles with different shapes and angles. The baffles are arranged in a staggered manner, and there is a certain angle between adjacent baffles from the horizontal direction, so that the liquid changes direction during falling. The rectangular baffle is used to provide a larger impact area, so that the liquid can be quickly dispersed; the triangular baffle can guide the liquid to a specific direction to enhance the disturbance of the liquid; and the arc-shaped baffle utilizes the arc to make the liquid form a more uniform liquid film, facilitating subsequent gas atomization.

[0020] Further, the gas passage of the valve structure surrounds the liquid delivery pipeline.

[0021] Further, the ultrasonic device is provided with two, and the two ultrasonic devices are symmetrically arranged below the liquid delivery pipeline.

[0022] In the utility model, liquid enters the nozzle from the liquid inlet, and is accelerated by the tapered structure of the inlet and then impacts on the first layer of baffles, so that the liquid is dispersed for the first time. Then, the dispersed liquid slides along the inclined angle of the baffle to the next layer of baffles with different shapes and angles, is impacted and dispersed again, and forms smaller droplets or liquid films. The liquid dispersed by the multiple layers of baffles meets the high-speed gas sprayed from the inclined gas nozzle during falling. The impact force of the high-speed gas further breaks the droplets and liquid films, and the shear force between the gas and the liquid fully atomizes the liquid, and small particles are sprayed from the lower part of the nozzle.

[0023] The beneficial effect of the utility model lies in that the multiple layers of baffles with different shapes and angles disperse the liquid multiple times, so that the liquid has a smaller initial form before contacting with the gas, greatly increases the gas-liquid contact area, thereby significantly improves the atomization effect, and makes the atomized particles smaller and more uniform.

[0024] The device of the application can flexibly adjust the working parameters of the nozzle according to different liquid characteristics (such as viscosity, surface tension, etc.) and atomization requirements, and realize the best atomization effect by changing the number of layers, shape, angle of the baffle and the liquid flow regulating valve.

[0025] The baffle in the application adopts a detachable clamping groove and clamping block mounting mode, which can be conveniently disassembled, cleaned or replaced if wear or blockage occurs after long-term use, thereby reducing the maintenance cost and prolonging the service life of the equipment.

[0026] The innovative process and device of the application significantly improve the atomization effect of the metal melt, and provide an efficient solution for preparing ultra-fine powder. The metal melt is first preliminarily broken by the diversified baffle, the gas atomization condition is effectively improved, and the gas atomization process is more sufficient. After the initial breaking of the gas atomization, the non-contact ultrasonic technology is introduced to break the metal melt again, further refine the particles, and significantly improve the atomization efficiency, thereby being more conducive to preparing the ultra-fine powder with uniform particle size. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0028] Figure 1 The structure schematic diagram of the atomizing nozzle device provided by the present application is shown in the figure.

[0029] Figure 2 The structure schematic diagram of the gas passage amplification structure of the atomizing nozzle device provided by the present application is shown in the figure.

[0030] Figure 3 The structure schematic diagram of the baffle structure of the atomizing nozzle device provided by the present application is shown in the figure.

[0031] In the drawings, the structure represented by each reference numeral is listed as follows: 1-nozzle body, 2-liquid inlet, 3-liquid delivery pipeline, 4-liquid flow regulating valve, 5-clamping groove, 6-baffle, 7-gas passage, 8-ultrasonic device. DETAILED DESCRIPTION

[0032] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0033] In the description of the utility model, it needs to understand that the orientation or positional relation indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or positional relation based on the drawings shown, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0034] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise explicitly specified and limited.

[0035] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0036] In the utility model, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature in the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature in the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature in the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0037] The atomizing nozzle device for preparing superfine powder can be finely adjusted, comprising a nozzle body 1;

[0038] Wherein, the upper part of the nozzle body 1 is provided with a liquid inlet 2, the lower part of the nozzle body 1 is a liquid delivery pipeline 3, and the connecting part of the liquid inlet 2 and the liquid delivery pipeline 3 is provided with a liquid flow regulating valve 4;

[0039] The inner wall of the liquid delivery pipeline 4 is provided with a plurality of clamping grooves 5, and each clamping groove 5 is detachably provided with a baffle 6.

[0040] The outer side of the lower end of the liquid delivery pipeline 3 is provided with a gas channel 7 in a valve structure.

[0041] The lower side of the liquid delivery pipeline 3 is provided with at least one ultrasonic device 8.

[0042] In some embodiments, the nozzle body 1 is made of ceramic material or super-liquid-repellent surface material.

[0043] In some embodiments, the baffle 6 is a rectangular, triangular or arc-shaped baffle.

[0044] In another embodiment, the baffle 6 forms an angle of 15-45 degrees with the horizontal direction downward.

[0045] In some embodiments, the gas channel 7 in the valve structure surrounds the liquid delivery pipeline.

[0046] In some embodiments, the ultrasonic device 8 is provided with two, and the two ultrasonic devices are symmetrically arranged below the liquid delivery pipeline.

[0047] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present specification.

[0048] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A finely adjustable atomizing nozzle device for producing ultrafine powder, characterized by, The nozzle body comprises a nozzle body; Wherein, the upper part of the nozzle body is provided with a liquid inlet, the lower part of the nozzle body is a liquid delivery pipeline, and the connection between the liquid inlet and the liquid delivery pipeline is provided with a liquid flow regulating valve; A plurality of clamping grooves are arranged on the inner wall of the liquid delivery pipeline, and a baffle is detachably installed on each clamping groove; The outer side of the lower end of the liquid delivery pipeline is provided with a gas channel in the form of a valve structure; At least one ultrasonic device is arranged below the liquid delivery pipeline.

2. The atomizing nozzle device for preparing ultrafine powder with fine adjustment according to claim 1, wherein, The nozzle body is made of ceramic material or super-liquid-repellent surface material.

3. The atomizing nozzle device for preparing ultrafine powder with fine adjustment according to claim 1, wherein, The baffle is a rectangular, triangular or arc-shaped baffle.

4. The atomizing nozzle device for preparing ultrafine powder with fine adjustment according to claim 3, wherein, The baffle forms an angle of 15-45 degrees with the horizontal direction downward.

5. The atomizing nozzle device for preparing ultrafine powder with fine adjustment according to claim 1, wherein, The gas channel in the form of a valve structure surrounds the liquid delivery pipeline.

6. The atomizing nozzle device for preparing ultrafine powder with fine adjustment according to claim 1, wherein, Two ultrasonic devices are arranged below the liquid delivery pipeline in a symmetrical manner.

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