WO2020001275A1 - Particle size detection device, atomization powder-making system and atomization powder-making method - Google Patents

Abstract

A particle size detection device, an atomization powder-making system and an atomization powder-making method, relating to the technical field of atomization powdering, the particle size detection device comprising a processing pipeline (100), an inflow pipe (200), a reflow pipe (300) and a sample tank (400). The sample tank (400) is provided with a particle size detection mechanism (A); the processing pipeline (100) comprises an inlet end (101) and an outlet end (102); the sample tank (400) comprises a feed port (401) and a discharge port (402); the inlet end (101) is in fluid communication with the feed port (401) by means of the inflow pipe (200), and the outlet end (102) is in fluid communication with the discharge port (402) by means of the reflow pipe (300). The present particle size detection device alleviates the technical problem in related technology of particle size distribution deviating an expected value in the later stage of atomization due to the atomizing time being too long.

Description

Particle size detecting device, atomizing powder system and atomizing powder method

Cross-reference to related applications

This application claims priority from a Chinese patent application filed with the Chinese Patent Office on June 29, 2018 under the application number 2018107126846, entitled "Particle Size Detection Device and Atomizing Powder System", the entire contents of which are incorporated herein by reference. Applying.

Technical field

The present disclosure relates to the technical field of atomized powder, and particularly to a particle size detection device, an atomized powder system, and an atomized powder method.

Background technique

At present, the powder used in 3D printing, injection molding, and thin-film solar cell target production has certain requirements on particle size. For example, 3D printing generally uses powder with a particle size of 15-55 μm. Beyond the particle size range, it will affect production equipment and products. Have a certain impact. Most powders are obtained by sieving or other classification methods after aerosol milling.

The current air atomizing pulverizers are adjusted for the best parameters, and then the best parameters are used for atomizing and pulverizing. With the development of gas atomization, under the circumstances that various factors such as the change in the diameter of the diversion tube, the temperature of the atomization, and the parameter of the atomization gas may exist, it is difficult to ensure the current gas atomization method The powder is in the best particle size distribution, especially for large-scale aerosolizing powder making equipment. The large amount of powder preparation may cause the particle size distribution in the later stage of the atomization to deviate from the expected value because of the longer atomization time.

Summary of the invention

The purpose of the present disclosure is to provide a particle size detection device, an atomizing powder system, and an atomizing powder method, in order to alleviate the technology that the particle size distribution in the late stage of atomization deviates from the expected value due to the long atomization time in the prior art. problem.

According to a first aspect of the present disclosure, a particle size detection device is provided, including: a process pipe and a sample cell. The sample cell is provided with a particle size detection mechanism. The process pipe includes an inlet end and an outlet end. The sample cell includes a feed inlet and an outlet. The material inlet, the inlet end is in fluid communication with the feed inlet, the outlet end is in fluid communication with the outlet, and particles enter the particle size detection mechanism through a communication pipe and a sample cell.

Optionally, the particle size detection device of the present disclosure further includes an inlet pipe and a return pipe, the inlet end is in fluid communication with the feed port through the inlet pipe, and the outlet end is in fluid communication with the feed port through the return pipe.

Optionally, the particle size detection mechanism includes a laser, a focusing lens, and a photodetector, wherein the focusing lens and the optical detector are sequentially arranged along a laser transmission direction of the laser, and the focusing lens and the photodetection The detectors are respectively located on opposite sides of the sample cell, and the laser light emitted by the laser enters the photodetector through the focusing lens and the sample cell.

Optionally, the particle size detection mechanism further includes an optical path conversion component disposed in the laser transmission direction, and the laser light emitted by the laser is changed into the focusing lens, the sample cell, and the photodetector in this order by changing the laser transmission direction through the optical path conversion component.

Optionally, the laser and the photodetector are arranged side by side, and the optical path conversion component includes a first reflector and a second reflector arranged at an angle of 90 °, and the laser light emitted by the laser passes through the first reflector and the second reflector in order. After the reflection, the laser transmission direction is reversed and emitted.

Optionally, a negative pressure powder suction device is provided in the inlet pipe, and the negative pressure powder suction device sucks part of the sampled material powder in the process pipeline into the sample cell.

Optionally, a sampling valve is provided on the inlet pipe.

Optionally, a feed valve is provided on the inlet pipe.

Optionally, the particle size detection device further includes a feed pipe and a discharge pipe, the feed pipe is in fluid communication with the feed pipe and the feed port, and the discharge pipe is in fluid communication with the feed port and the return pipe, respectively.

Optionally, the particle size detection device further includes an ejector, and the ejector is configured to inject an airflow to the feeding pipe.

Optionally, a discharge valve is provided on the discharge pipe.

Optionally, the particle size detection device further includes a support rod for supporting the sample cell, and two ends of the support rod are fixedly connected to the sidewall of the process pipe and the sidewall of the sample cell, respectively.

Optionally, the particle size detection device further includes a sampling and dilution tube, and the sampling and dilution tube is in fluid communication with the inflow pipe through a process pipe, and a positive pressure powder suction device is provided at an end of the sampling and dilution pipe away from the process pipe, and the positive pressure powder suction The sampler blows part of the sample material powder in the process pipeline into the sample cell.

In another aspect of the present disclosure, an atomizing powder system is provided to alleviate the technical problem that the particle size distribution in the late stage of atomization deviates from the expected value due to the long atomizing time in the related art.

The atomizing powder system provided by the present disclosure includes: an atomizing cavity, a main collecting hopper, a connecting pipe and the particle size detecting device described above, the atomizing cavity, the process pipe of the particle size detecting device, and the main collecting hopper are in fluid communication with each other through the connecting pipe. .

Optionally, the atomizing cavity includes a control terminal for adjusting the particle size of the atomized powder, and the atomizing powder system further includes a controller, and the controller is respectively connected to the photoelectric detector and the control terminal in the particle diameter detecting device.

In another aspect of the present disclosure, a method for atomizing powder is provided. The method includes: the atomizing cavity prepares atomized powder according to preset parameters, and the obtained atomized powder is sent to a main collection hopper through a process pipe and a communication pipe. Part of the atomized powder enters the communication pipe through the inflow pipe, the sample pool and the return pipe in sequence. The particle size detection mechanism detects the partially atomized powder passing through the sample pool and outputs the detection result. The controller compares the received detection result with a preset threshold, and adjusts the preset parameters of the atomizing cavity according to the comparison result.

Optionally, the preset parameters of the atomizing chamber include a liquid flow rate, an air flow rate, and a pressure value.

The particle size detection device, atomizing powder system and atomizing powder method provided by the present disclosure. The particle size detection device includes a process pipe and a sample pool. The sample pool is provided with a particle size detection mechanism. The process pipe includes an inlet end and an outlet. At the end, the sample cell includes a feeding port and a discharging port, the inlet end is in fluid communication with the feeding port, and the outlet end is in fluid communication with the discharging port. The process pipe is in fluid communication with the communication pipe in the atomizing pulverizing system. The produced powder passes through the process pipe during transportation. Part of the powder in the process pipe enters the sample pool as a sampling test powder, and the particle size detection mechanism detects the The particle size of the powder does not prevent the flow of the sampled powder during the detection process. After the sampled powder passes through the sample cell, it re-enters the process pipeline and is mixed with other prepared powders to be transported forward to avoid sampling losses. The particle size detecting device of the present disclosure is used in an atomizing powder system, and can perform real-time detection on the particle diameter of the atomized powder during the atomizing powder process, and can perform atomization on the atomizing powder according to the detection result of the real-time detection. The powder making parameters of the powder device are adjusted to reduce the occurrence of changes in the particle size distribution in the later stage of the atomization due to changes in the parameters of the atomizing powder system or the powder making environment due to the long atomization time.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the specific embodiments of the present disclosure or related technologies, the drawings used in the specific embodiments or related technical descriptions will be briefly introduced below. Obviously, the drawings in the following description are Some embodiments of the present disclosure, for those of ordinary skill in the art, can obtain other drawings according to the drawings without paying creative labor.

FIG. 1 is a schematic structural diagram of a particle diameter detection device according to an embodiment of the present disclosure;

2 is one of the structural schematic diagrams of a particle diameter detection mechanism of a particle diameter detection device provided by an embodiment of the present disclosure;

FIG. 3 is a second schematic structural diagram of an experienced detection mechanism of a particle diameter detection device according to an embodiment of the present disclosure; FIG.

4 is a third schematic structural diagram of a particle diameter detection mechanism of a particle diameter detection device according to an embodiment of the present disclosure;

FIG. 5 is one of the structural schematic diagrams of the atomizing powder making system according to the embodiment of the present disclosure; FIG.

FIG. 6 is a second schematic structural diagram of an atomizing powder system according to an embodiment of the present disclosure;

FIG. 7 is a flowchart of a method for atomizing powder according to an embodiment of the present disclosure.

Icon: 100-process pipeline; 101-inlet end; 102-outlet end; 110-support rod; 120-inflow connection pipe; 121-inflow ferrule joint; 130-return connection pipe; 131-return ferrule joint; 140 -Dilution connection tube; 141-Dilution ferrule joint; 200-inflow tube; 210-feed valve; 300-return tube; 400-sample cell; 401-feed port; 4011-feed ferrule joint; 402- Discharge port; 4021-discharge ferrule joint; 410-feed tube; 411-injector; 420-discharge tube; 421-discharge valve; 510-laser; 511-laser protective shell; 520-focusing lens; 530-photoelectric detector; 531-detector protective shell; 540-first reflector; 550-second reflector; 560-optical path conversion module; 600-sampling dilution tube; 700- atomizing cavity; 710-control terminal; 800-main collection hopper; 900-connecting pipeline; 910-controller; A-particle size detection mechanism

detailed description

In order to make the objectives, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions in the embodiments of the present disclosure will be described clearly and completely in combination with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments These embodiments are part of, but not all of, the embodiments of the present disclosure. The components of embodiments of the present disclosure generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Accordingly, the following detailed description of embodiments of the present disclosure provided in the accompanying drawings is not intended to limit the scope of the claimed disclosure, but merely to indicate selected embodiments of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present disclosure.

It should be noted that similar reference numerals and letters indicate similar items in the following drawings, so once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings. In the description of this disclosure, it needs to be understood that the terms "vertical", "horizontal", "up", "down", "front", "back", "left", "right", "vertical", The orientations or positional relationships indicated by "horizontal", "top", "bottom", "inner", "outer" are based on the orientations or positional relationships shown in the drawings, or the orientations commonly used when the invention product is used Or the positional relationship is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure.

In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "exemplary", "specific examples", or "some examples", "for example", etc. means in combination with this embodiment or The specific features, structures, materials, or characteristics described in the examples are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present disclosure, the meaning of "a plurality" is two or more, unless specifically defined otherwise. The expressions (such as “first”, “second”, and the like) used in various embodiments of the present disclosure may modify various constituent elements in the various embodiments, but may not limit the corresponding constituent elements. For example, the above expressions do not limit the order and / or importance of the elements. The above expressions are only used for the purpose of distinguishing one element from other elements. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, without departing from the scope of various embodiments of the present disclosure, a first element may be referred to as a second element, and likewise, a second element may be referred to as a first element.

In the description of the present disclosure, unless otherwise specified and limited, it should be noted that the terms "installation", "connected", and "connected" should be understood in a broad sense, for example, they may be mechanical or electrical connections, or both. The internal connection of the two elements may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms may be understood according to specific situations. If it is described that one constituent element is “connected” to another constituent element, the first constituent element can be directly connected to the second constituent element, and the third constituent element can be “connected” between the first constituent element and the second constituent element. element. In contrast, when one constituent element is “directly connected” to another constituent element, it can be understood that there is no third constituent element between the first constituent element and the second constituent element.

The technical solution of the present disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present disclosure, but not all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present disclosure.

As shown in FIG. 1, the particle size detection device provided in the embodiment of the present disclosure includes a process pipe 100 and a sample cell 400. The process pipe is used for conveying powder. The sample cell 400 is provided with a particle size detection mechanism A, and the sample cell 400 is used for Take part of the powder from the process pipe 100 and measure the particle size of the particles in the powder. The process pipe 100 includes the inlet 101 and the outlet 102, and the sample cell 400 includes the inlet 401 and the outlet 402, and the inlet 101 It is in fluid communication with the inlet 401, the outlet 102 is in fluid communication with the outlet 402, and the particles enter the particle size detection mechanism A through the process pipe 100 and the sample cell 400 provided in communication.

The above-mentioned particle size detection device further includes an inlet pipe 200 and a return pipe 300, the inlet end 101 and the feed port 401 are in fluid communication through the inlet pipe 200, and the outlet end 102 and the outlet port 402 It is in fluid communication through the return pipe 300.

Specifically, as shown in FIG. 1, the inlet 101 of the process pipe 100 and the inlet 401 of the sample cell 400 are in fluid communication through an inlet pipe 200, that is, the fluid passing through the inlet 101 of the process pipe 100 can pass through the inlet. The tube 200 enters the inlet 401 of the sample cell 400, and the outlet end 102 of the process tube 100 and the outlet 402 of the sample cell 400 are in fluid communication through a return pipe 300, that is, the fluid passing through the outlet 402 of the sample cell 400 can An outlet end 102 of the process pipe 100 is entered through the return pipe 300. The manner of the inlet pipe 200 and the return pipe 300 can improve the tightness and stability of the fluid flowing in the pipeline. The inflow pipe 200 and the return pipe 300 are commonly used transmission media for fluid flow. When a failure occurs or the service life is reached, maintenance and replacement are also more convenient.

It should be noted that, first, the fluid communication between the two or the three means that the fluid circulating in the two or the three can communicate and transmit with each other. For example, as shown in FIG. 1, the inlet end 101 of the process pipe 100 and the inlet 401 of the sample cell 400 are in fluid communication through the inlet pipe 200, that is, the fluid passing through the inlet end 101 of the process pipe 100 can pass through the inlet pipe 101. The flow tube 200 enters the inlet 401 of the sample cell 400, or the fluid in the inlet 401 of the sample cell 400 can also enter the inlet 101 of the process tube 100 through the inlet tube 200. The specific flow direction of the fluid depends on the fluid. The direction of the positive pressure is related.

It should be noted that the inlet end 101 and outlet end 102 of the process pipe 100 do not refer to only one port, but refer to a part of the process pipe. For example, in FIG. 1, the part of the process pipe 100 above the support rod 110 may be called The outlet end 102 and the part of the process pipe 100 below the support rod 110 may be referred to as the inlet end 101.

As shown in FIG. 1, the particle size detection device A further includes an inflow connection pipe 120 and a return connection pipe 130. The inflow connection pipe 120 is disposed on a side wall of the inlet end 101 of the process pipe 100. The inflow connection pipe 120 and the process pipe 100 The backflow connection pipe 130 is arranged on the side wall of the outlet end 102 of the process pipe 100. The backflow connection pipe 130 communicates with the process pipe 100. Through the inflow connection pipe 120 and the backflow connection pipe 130, the particles can be aligned. The installation position of the diameter detection mechanism A is fixed, and the installation and disassembly are convenient and efficient, and the problem of leakage at the connection position is not easy.

For example, as shown in FIG. 1, the inflow connection pipe 120 and the return connection pipe 130 are disposed on the same side of the process pipe 100. The axis of the inflow connection pipe 120 and the return connection pipe 130 are parallel to each other, and are both parallel to the process pipe 100. The axis is vertical; the end of the inflow connection pipe 120 away from the process pipe 100 is provided with an inflow ferrule joint 121, and the inflow pipe 200 is connected to the inflow connection pipe 120 through the inflow ferrule joint 121. The inflow ferrule joint 121 is convenient for setting. The inflow pipe 200 is installed on the inflow connection pipe 120; the end of the return connection pipe 130 away from the process pipe 100 is provided with a return ferrule joint 131, and the return pipe 300 is connected to the return connection ferrule 130 through the return ferrule joint 131, and the return ferrule joint 131 It is convenient to install the return pipe 300 on the return connection pipe 130. In this way, by selecting different types of inlet ferrule joint 121 and return ferrule joint 131, the inlet pipe 200 and inlet connection pipe 120 with different pipe diameters, and the return pipe 300 and return pipe with different pipe diameters can be conveniently used. The connection between the connection pipes 130 effectively reduces the problem of air leakage and powder leakage at the connection position.

Normally, in the process of atomizing and pulverizing, a positive pressure is applied to the process pipeline 100 so that the produced powder is efficiently conveyed in the pipeline in a predetermined direction. As shown in FIG. 1, the powder is in the process pipeline 100 Inside, under the premise of applying positive pressure, the powder is transported from the inlet end of the process pipe 100 to the outlet end of the process pipe 100, and part of the powder during the transfer process will sequentially pass through the inlet connection pipe 120, the inlet pipe 200, The sample cell 400, the return pipe 300, and the return connection pipe 130 are transmitted to the outlet end 102 of the process pipe 100 and output from the outlet end 102 of the process pipe 100. This part of the powder is the sampling powder. The sampling powder is randomly selected from the obtained powder, and the particle diameter detection mechanism A performs particle size detection on the sampled powder, which can more accurately describe the particle diameter state of the entire powder.

Optionally, as shown in FIG. 2, the particle size detection mechanism A includes a laser 510, a focusing lens 520, and a photodetector 530, where the focusing lens 520 and the photodetector 530 are along the laser transmission direction of the laser 510 (as shown in FIG. 2). (Indicated by the dashed arrows) are sequentially arranged, the focusing lens 520 and the photodetector 530 are located on opposite sides of the sample cell 400, and the laser light emitted by the laser 510 enters the photodetector 530 through the focusing lens 520 and the sample cell 400.

Because light is volatile, according to the principle of light diffraction, when light encounters obstacles or small holes during the propagation process, the light will deviate from the straight path and propagate behind the obstacle, and according to the size of the obstacle encountered The light's diffraction propagation path will also be different. The wavelength of the monochromatic laser emitted by the laser 510 is usually several hundred nanometers. Monochromatic light is irradiated on the sampling powder particles (the particle diameter of the sampling powder particles is much larger than several hundred nanometers) passing through the sample cell 400. According to the particle diameter of the powder particles, Generate different directions of propagation. Therefore, the laser light emitted after diffraction forms light spots with different brightness levels. The light intensity of the light spots is detected by the photodetector 530. As the particle size gradually increases, the diffraction angle generated by the laser beam on the powder particles It is gradually decreasing. After a large number of sampled powder particles are irradiated with the laser beam, the photodetector 530 receives the light signal and performs analysis and processing to obtain a powder particle size range with a normal distribution.

The photodetector 530 includes a detection module and a processing module. The detection module detects and receives the light signals irradiated on the powder particles and generates the corresponding diffraction angle, and the processing module analyzes and receives the received light signals, including different The corresponding calculation of the light signal of the diffraction angle and the particle size of the powder particles irradiated, and the storage and statistics of the particle size values of a large number of powder particles, so as to obtain a powder particle size range with a normal distribution. Alternatively, the photodetector 530 may also be in a form including only a detection module. For this type of photodetector 530, a corresponding calculation processor needs to be provided to perform the above-mentioned calculation and processing on the optical signal.

In some embodiments, as shown in FIG. 2, the laser 510, the focusing lens 520, the sample cell 400, and the photodetector 530 are sequentially disposed along the laser transmission direction, and the emitting end of the laser 510 is opposite to the focusing lens 520. The powder passes through the sample cell 400, and the laser 510 emits a laser beam. The focusing lens 520 condenses the laser beam into an incident laser light, and the incident laser light irradiates the powder in the sample cell 400.

As another embodiment, as shown in FIG. 3, the particle size detection mechanism A further includes an optical path conversion component 560 disposed in a laser transmission direction (shown by a dotted arrow in FIG. 3), and the laser light emitted by the laser 510 is converted by the optical path. The component 560 changes the laser transmission direction (shown by the dotted arrow in FIG. 3), and then enters the focusing lens 520, the sample cell 400, and the photodetector 530 in this order.

As shown in FIG. 3, the optical path conversion component 560 can change the laser transmission direction, for example, a reflective prism. Through the function of the optical path conversion component 560, in the particle size detection mechanism A of the embodiment of the present disclosure, it is not necessary to define a specific position relationship between the laser 510, the sample cell 400, and the photodetector 530, but may be based on the particle size detection device. The specific structure is set, for example, as shown in FIG. 3, the laser 510 is set above the sample cell 400, and the laser emits a laser beam vertically downward, and the laser transmission direction is transmitted through the optical path conversion component 560 (as shown by the dotted arrow in FIG. 3). (Shown) is adjusted to output horizontally, so that the focusing lens 520, the sample cell 400, and the photodetector 530 are sequentially incident horizontally.

Optionally, as shown in FIG. 4, the laser 510 and the photodetector 530 are arranged in parallel, and the optical path conversion component 560 includes a first reflector 540 and a second reflector 550 arranged at an angle of 90 °, and the laser light emitted by the laser 510 is sequentially After being reflected by the first reflector 540 and the second reflector 550, the laser transmission direction (shown by the dashed arrow in FIG. 4) is reversed and emitted 180 °, so that the laser light emitted by the laser emitter 510 can be irradiated to focus. Lens 520. In this way, the overall space size of the particle diameter detection mechanism A can be saved, and the arrangement between the internal components of the particle diameter detection mechanism A can be made compact and reasonable.

As shown in FIG. 4, the first reflecting mirror 540 and the second reflecting mirror 550 are provided on the left side of the laser 510 and the focusing lens 520. The first reflecting mirror 540 is located below the second reflecting mirror 550. The angle between the reflecting surface and the reflecting surface of the second reflecting mirror 550 is 90 °. The laser beam emitted by the laser 510 enters the first reflecting mirror 540 in a direction of 45 °, is reflected by the first reflecting mirror 540, and then is reflected at 45 °. The included angle is reflected by the second reflector 550. At this time, the laser transmission direction (shown by the dashed arrow in FIG. 4) is turned 180 °, and further incident and focused by a path parallel and opposite to the laser transmission direction originally output by the laser. The lens 520, the sample cell 400, and the photodetector 530. The first reflector 540 and the second reflector 550 are provided as the light path conversion component 560, so that the laser 510 can be disposed below the focusing lens 520, thereby reducing the space occupied by the entire particle size detection device.

Optionally, as shown in FIG. 1, a negative pressure powder suction device (not shown in FIG. 1) is provided in the inlet tube 200, and the negative pressure powder suction device sucks part of the sampled material powder in the process pipeline 100 and enters the sample cell 400. .

Negative pressure powder suction device refers to a device that sucks powder by means of negative pressure. The negative pressure powder suction device is provided in the inlet pipe 200 and can provide negative pressure to the inlet pipe 200 so that the powder passing through the process pipe 100 A part is sucked into the inlet pipe 200. A part of the powder sucked into the inflow tube 200 is passed as a sample substance powder through the sample cell 400 and subjected to particle size detection. By setting a negative pressure powder suction device, the amount of sampled material particles sucked can be easily controlled, an appropriate amount of sampled material particles can be entered into the inflow pipe 200, and excessive sampled material particles passing through the sample cell 400 can be avoided, stacked on each other and passed through the photodetector. 530, affecting the accuracy of the detection result of the photodetector 530.

Optionally, as shown in FIG. 1, a sampling valve (not shown in FIG. 1) is further provided on the inlet pipe 200, and the sampling valve is opened and closed at a regular time. When the sampling valve is opened, the negative pressure powder suction device will process the pipeline. The powder inside 100 is sucked into the inlet tube 200 and enters the sample cell 400 through the inlet tube 200. After the sampling is completed, the sampling valve is closed. Setting a sampling valve, and regularly opening and closing the sampling valve, and cooperating with the starting and closing of the negative pressure powder sucker, can enable the particle diameter detection device of the embodiment of the present disclosure to automatically take samples for detection.

Optionally, as shown in FIG. 1, the inlet pipe 200 is provided with a inlet valve 210. For example, the first end of the inflow tube 200 is in fluid communication with the inflow connection tube 120, the second end of the inflow tube 200 is in fluid communication with the sample cell 400, and a feed valve 210 is installed in the inflow tube 200 for controlling the inflow The communication and closing of the tube 200. When the particle diameter detection device of the embodiment of the present disclosure detects the particle diameter of the powder, the feeding valve 210 is opened, so that part of the powder enters the sample cell 400 to be detected, the feeding valve 210 is closed, and the powder sampling and detection through the process pipeline 100 is stopped, and It is possible to prevent powder or other impurities from entering the sample cell 400 through the inlet tube 200.

Optionally, as shown in FIG. 1, the particle size detection device further includes a feeding pipe 410 and a discharging pipe 420. The feeding pipe 410 is in fluid communication with the inlet pipe 200 and the inlet 401, respectively. The discharge port 402 is in fluid communication with the return pipe 300.

Optionally, as shown in FIG. 1, the feed pipe 410 and the discharge pipe 420 are both straight, and the axis of the feed pipe 410 and the axis of the discharge pipe 420 coincide with the axis of the sample cell 400; The feeding port 401 is provided with a feeding sleeve joint 4011. One end of the feeding tube 410 is in fluid communication with the inlet tube 200. The other end of the feeding tube 410 is connected to the sample cell 400 through the feeding sleeve 4011. The feeding card The sleeve joint 4011 facilitates the connection and disassembly of the feeding tube 410 and the sample cell 400; the discharge port 402 of the sample cell 400 is provided with a discharging ferrule joint 4021, one end of the discharging tube 420 is connected to the return tube 300, and the discharging tube 420 The other end is connected to the sample cell 400 through a discharge card joint 4021. The output card joint 4021 facilitates the connection and removal of the discharge tube 420 and the sample cell 400.

A feeding tube 410 is provided at the feeding port 401 of the sample cell 400, so that the movement direction of the powder before entering the sample cell 400 is the same as the movement direction of the powder when entering the sample cell 400, so as to stabilize the powder movement in the sample cell 400 and avoid Has an impact on the test results; a discharge pipe 420 is set at the outlet 402 of the sample cell 400, and the powder flowing out of the sample cell 400 continues to move linearly to prevent the direction of movement from changing, resulting in powder accumulation, which in turn affects the powder in the sample cell 400. motion.

Optionally, as shown in FIG. 1, the particle diameter detection device according to the embodiment of the present disclosure further includes an ejector 411 for ejecting an air flow to the feeding pipe 410.

Since the photodetector 530 detects the particle size of the sampled substance powder, it is the detection data obtained by receiving the laser light to irradiate the powder particle distribution state. If the amount of sampled substance powder passed is too large, or the particle of the sampled substance powder is passed, If there are too many stackings on each other, the particle diameter of the powder particles detected by the photodetector 530 may be wrong or the result may be wrong. Therefore, the ejector 411 is provided, and the ejector 411 sprays the airflow to the feeding pipe 410, which can The powder particles of the sampling substance entering the sample cell 400 are dispersed with each other to minimize overlapping or stacking, thereby improving the detection accuracy of the photodetector 530.

For example, as shown in FIG. 1, the ejector 411 is installed at an end of the feeding pipe 410 away from the sample cell 400. The ejector 411 is in fluid communication with the feeding pipe 200 and the feeding pipe 410, respectively. The powder in the inflow tube 200 enters the ejector 411, the ejector 411 disperses the powder, and then enters the sample cell 400 to reduce the amount of powder overlap when passing through the sample cell 400 and improve the detection accuracy.

Optionally, a venturi valve (not shown in FIG. 1) is provided in the feeding tube 410. The venturi valve is located between the injector 411 and the sample cell 400. The venturi valve is used to control the feeding tube 410 for powder. The size of the cross-sectional area passed. When the amount of powder ejected by the ejector 411 is greater than the required amount, if the throughput of the powder is not controlled, it may be difficult to avoid the problem of mutual overlap between the sampled material powder passing through the sample cell 400, and at this time through the venturi valve Reduce the cross-sectional area of the feed pipe 410 for the powder to pass through, thereby reducing the amount of powder entering the sample cell 400; when the amount of powder ejected by the ejector 411 is less than the required amount, it can also pass through the venturi valve Increasing the cross-sectional area of the feeding tube 410 through which the powder passes, thereby increasing the amount of powder entering the sample cell 400.

Optionally, as shown in FIG. 1, the discharge pipe 420 is provided with a discharge valve 421. Specifically, the first end of the discharge pipe 420 (ie, the lower end shown in FIG. 1) is connected to the sample cell 400, and the second end of the discharge pipe 420 (ie, the upper end shown in FIG. 1) is connected to the return pipe 300. The discharge valve 421 is installed on the discharge pipe 420 for controlling the communication of the discharge pipe 420 and closed. When the particle diameter detection device of the embodiment of the present disclosure detects the particle diameter of the powder, the discharge valve 421 is opened. The powder enters the return pipe 300 through the discharge pipe 420, and when the particle diameter detection device stops the detection, the discharge valve 421 is closed to prevent foreign matter from entering the sample cell 400 through the discharge pipe 420.

Optionally, as shown in FIG. 1, the particle size detection device according to the embodiment of the present disclosure further includes a support rod 110 for supporting the sample cell 400, and two ends of the support rod 110 are respectively connected to the side wall of the process pipe 100 and the side wall of the sample cell 400. Fixed connection.

As shown in FIG. 1, the components of the sample cell 400, the laser 510, and the photodetector 530 in the particle diameter detection device according to the embodiment of the present disclosure have a certain weight, so the inlet tube 200 and the inlet tube connected to the sample cell 400 410, storage tank 420, and return pipe 300 have limited hardness conditions, and it is difficult to ensure stable support. Therefore, support rods 110 are fixedly connected at both ends to the side wall of the process pipe 100 and the side wall of the sample cell 400 to ensure The working stability of the sample cell 400 and other detection components connected to both sides of the sample cell 400.

As shown in FIG. 1, the particle size detection device provided by the embodiment of the present disclosure further includes a laser protection case 511 and a detector protection case 531. The laser 510 is fixedly installed inside the laser protection case 511, and the photodetector 530 is fixedly installed in the detector protection. Inside the case 531, the laser protection case 511 and the detector protection case 531 are connected to the sample cell 400; the laser protection case 511 is provided with a laser exit for emitting a laser beam, and the detector protection case 531 is provided with a diffraction allowance Light entrance into which light enters. In this way, the laser beam emitted by the laser 510 can be transmitted inside the laser protection case 511, the sample cell 400, and the detector protection case 530, thereby preventing the detection process from being disturbed and affected by the external environment.

Optionally, as shown in FIG. 1, the particle size detection device further includes a sampling and dilution tube 600. The sampling and dilution tube 600 is in fluid communication with the inlet pipe 200 through the process pipe 100, and a positive pressure is set at an end of the sampling and dilution pipe 600 away from the process pipe 100. The powder sucker and the positive pressure powder sucker blow part of the sampled substance powder in the process pipe 100 into the sample cell 400.

As shown in FIG. 1, the inlet end 101 of the process pipe 100 is provided with a dilution connection pipe 140 in fluid communication with the process pipe 100. The dilution connection pipe 140 and the inflow connection pipe 120 are located on both sides of the process pipe 100. One end is fixedly connected to the side wall of the process pipe 100. The second end of the dilution connection pipe 140 is provided with a dilution ferrule joint 141. The sampling dilution tube 600 is connected to the dilution connection pipe 140 through the dilution ferrule joint 141 and the dilution ferrule joint 141. Convenient connection and disassembly of the sampling dilution tube 600 and the dilution connection tube 140. The end of the sampling dilution tube 600 away from the process pipe 100 is connected to a positive pressure powder suction device (not shown in FIG. 1). A part of the sampled substance powder inside is blown to the sample cell 400 through the inlet pipe 200.

When the powder in the process pipe 100 needs to be tested, the positive pressure powder suction device is turned on, and the powder is blown from the process pipe 100 through the sampling dilution pipe 600. The blowing process will cause part of the sampled substance powder to enter the inflow pipe 200. And further flow to the sample cell 400 for detection, this method can not only accurately detect the particle size of the prepared sample substance powder, but also does not need to stop the atomization device during the detection process, so the powder productivity will not be reduced.

In another aspect of the embodiments of the present disclosure, an atomizing powder system is also provided. As shown in FIG. 5, the system includes: an atomizing chamber 700, a main collecting hopper 800, a communication pipe 900, and the particle diameter described in any one of the foregoing. The detection device, the atomization chamber 700, the process pipe 100 of the particle size detection device A, and the main collection hopper 800 are in fluid communication with each other through a communication pipe 900.

As shown in FIG. 5, the particle size detection device A is located between the atomization chamber 700 and the main collection hopper 800, and the process pipe 100 is in communication with the communication pipe 900. The powder made in the atomizing chamber 700 is conveyed to the main collection hopper 800 through the connecting pipe 900. When passing through the process pipe 100, it enters the sample cell 400 through the inlet tube 200. The laser 510 cooperates with the photodetector 530 to detect the The particle size of the powder, the detected powder re-enters the process pipeline 100 through the return pipe 300, and continues to be forwarded to the main collection hopper 800 to avoid sampling loss.

Optionally, as shown in FIG. 6, the atomizing cavity 700 includes a control terminal 710 for adjusting the particle size of the atomized powder, and the atomizing powder system further includes a controller 910. The photodetector 530 and the control terminal 710 are signal-connected.

In this way, during the pulverizing operation using the atomizing pulverizing system of the embodiment of the present disclosure, the operator may receive the detection value of the photodetector 530 through the controller 910, and according to the detection value, the The process parameters in the control terminal 710 are adjusted so as to improve the atomizing powder system of the embodiment of the present disclosure to maintain better working efficiency during a long-term large-scale powder milling process, and to prevent the particle size distribution in the late stage of atomization from deviating from the expected value. The problem.

The particle size detection device and the atomizing powder system provided in the embodiments of the present disclosure. The particle size detection device includes a process pipe 100 and a sample cell 400. A particle size detection mechanism A is provided at the sample cell 400, and the process pipe 100 includes an inlet 101. With the outlet end 102, the sample cell 400 includes a feeding port 401 and a discharging port 402, the inlet end 101 is in fluid communication with the feeding port 401, and the outlet end 102 is in fluid communication with the discharging port 402. The process pipe 100 is in fluid communication with the communication pipe 900 in the atomizing pulverizing system. The powder passes through the process pipe 100 during the transportation, and the powder in the process pipe 100 enters the sample tank 400. The particle diameter detecting mechanism A detects the powder passing through the sample tank 400. Particle size, the detected powder re-enters the process pipeline 100 and continues to be transported forward to avoid sampling loss. The particle size detection device provided in the embodiments of the present disclosure can check the particle size of the produced powder in real time and reduce the time due to atomization. If it is too long, the particle size distribution in the later stage of the atomization will deviate from the expected value.

In another aspect of the embodiments of the present disclosure, a method for atomizing powder is provided, as shown in FIG. 7, including:

S101. The atomizing cavity 700 prepares an atomized powder according to a preset parameter, and the obtained atomized powder is sent to a main collection hopper 800 through a process pipe 100 and a communication pipe 900.

Determine the particle size range of the atomized powder to be prepared, set the preset parameters for the atomization cavity 700 according to the requirements of the particle size range, and start the atomization powder system to prepare the atomized powder. It should be noted that a person skilled in the art can obtain the relationship between one or more preset parameters of the atomization cavity 700 and the particle size of the powder obtained through empirical judgment, data review, or other methods, so as to Diameter range, the parameters of the atomization chamber 700 are preset.

The produced atomized powder is sent to the main collection hopper 800 through the process pipe 100 and the communication pipe 900 for collection and storage.

S102. Part of the atomized powder enters the communication pipe 900 through the inflow tube 200, the sample cell 400, and the return tube 300 in sequence. The particle diameter detection mechanism A detects part of the atomized powder passing through the sample cell 400, and outputs the detection result.

The particle size detecting device can detect the produced atomized powder in real time. As an example, as shown in FIG. 1, a part of the produced atomized powder conveyed through the process pipe 100 is extracted by means of suction or the like. This part of the atomized powder passes through the inlet tube 200, the sample cell 400 and the return tube in this order. The detection is completed in the process of 300, and is returned to the Unicom pipeline 900 to be continued to the main collection hopper 800. Therefore, the detection of the particle size will not cause loss to the preparation of the atomized powder. The extracted part of the atomized powder is detected in the process of passing through the sample cell 400. The detection process has been described in detail in the part of the particle size detection device, and is not repeated here. After the detection is completed, the photodetector 530 outputs a detection result.

S103. The controller 910 compares the received detection result with a preset threshold, and adjusts a preset parameter of the atomization chamber 700 according to the comparison result.

A threshold range is preset in the controller 910. Due to the large preparation amount of atomized powder, the particle size of a large number of atomized powder particles cannot be guaranteed to be completely consistent. Therefore, the requirements for the particle size of atomized powder are usually delimited within a particle size range, which is the threshold range. The particle size detection result of the photodetector 530 on the atomized powder is usually a normal distribution curve. When the normal distribution curve can be within the threshold range, the prepared atomized powder can be considered to meet the design requirements. The curve deviates from the threshold range, and the preset parameters of the atomizing cavity 700 can be adjusted and changed correspondingly by the controller 910 to control the particle size of the atomized powder to be within the required particle size range.

Optionally, the preset parameters of the atomizing chamber 700 include a liquid flow rate, an air flow rate, and a pressure value.

The atomizing powder technology usually uses a high-speed airflow to act on the molten liquid flow, so that the kinetic energy of the gas is converted into the surface energy of the melt, and then fine droplets are formed and solidified into powder particles. Therefore, the particle size of the obtained powder particles is It is determined at least by the liquid flow of the molten liquid flow, the air flow of the high-speed air flow, and the air pressure value. Therefore, the adjustment of the preset parameters of the atomization chamber 700 should include one of the liquid flow, the air flow, and the air pressure value. Or more.

According to the foregoing embodiments of the present disclosure, it can be known that the atomized powder method of the embodiments of the present disclosure can maintain the continuous and efficient atomized powder while monitoring the particle size of the obtained atomized powder in real time. When the particle size distribution deviates from the expected value, the control terminal 710 of the atomization chamber 700 can be adjusted by the controller 910 to adjust the operating parameters of the atomization equipment in time by adjusting the preset parameters to reduce the particle size distribution from the expected value. Happening. Because the technical solution of the present disclosure adopts the method of online detection of particle size, there are few detection steps, short detection time, and it will not waste powder samples and avoid sampling loss. In addition, because it is online detection, it is not necessary to detect the particle size at the same time. The atomization equipment is stopped, so powder productivity is not reduced.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than limiting them. Although the present disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: The technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present disclosure. range.

Industrial applicability

The present disclosure provides a particle size detection device, an atomizing powder system and an atomizing powder method, which are in fluid communication with a communication pipe in the atomizing powder system through a process pipe, so that a part of the powder in the process pipe is used as a sample detection powder. It can enter the sample cell through the inlet tube, and perform the detection in the sample cell and output the result. The detection process does not affect the flow of the sampled test powder. After the sampled test powder passes through the sample cell, it re-enters the process pipeline through the return tube and is produced with other After the powder is mixed, it is forwarded to avoid sampling loss.

Claims (17)

1. A particle size detection device, comprising: a process pipe and a sample pool, the sample pool is provided with a particle size detection mechanism, the process pipe includes an inlet end and an outlet end, and the sample pool includes a feed port And a discharge port, the inlet end is in fluid communication with the feed port, the outlet end is in fluid communication with the discharge port, and particles enter a particle size detection mechanism via a communication process pipe and a sample cell.
2. The particle size detection device according to claim 1, wherein the particle size detection device further comprises an inlet pipe and a return pipe, and the inlet end is in fluid communication with the feed port through the inlet pipe, The outlet end is in fluid communication with the discharge port through the return pipe.
3. The particle diameter detection device according to claim 1 or 2, wherein the particle diameter detection mechanism comprises a laser, a focusing lens, and a photodetector, and wherein the focusing lens and the optical detector follow a laser of the laser The transmission direction is set in order, the focusing lens and the photodetector are respectively located on opposite sides of the sample cell, and the laser light emitted by the laser enters the photodetector through the focusing lens and the sample cell.
4. The particle diameter detection device according to claim 3, wherein the particle diameter detection mechanism further comprises an optical path conversion component provided in the laser transmission direction, and the laser light emitted by the laser is changed by the optical path conversion component. After the laser transmission direction, the focusing lens, the sample cell, and the photodetector are incident in this order.
5. The particle size detection device according to claim 4, wherein the laser is disposed in parallel with the photodetector, and the optical path conversion component includes a first reflector and a second reflector arranged at an angle of 90 ° After the laser light emitted by the laser is reflected by the first reflector and the second reflector in sequence, the laser transmission direction is reversed and emitted by 180 °.
6. The particle size detection device according to claim 2, wherein a negative pressure powder suction device is provided in the inlet pipe, and the negative pressure powder suction device sucks a part of the sampled substance powder in the process pipeline into the flow pipe. Sample cell.
7. The particle diameter detecting device according to claim 6, wherein a sampling valve is provided on the inlet pipe.
8. The particle size detection device according to claim 2, wherein a feed valve is provided on the inlet pipe.
9. The particle diameter detecting device according to claim 2, wherein the particle diameter detecting device further comprises a feeding pipe and a discharging pipe, and the feeding pipe is respectively connected to the inlet pipe and the inlet. In fluid communication, the discharge pipe is in fluid communication with the discharge port and the return pipe, respectively.
10. The particle diameter detecting device according to claim 9, wherein the particle diameter detecting device further comprises an ejector, and the ejector is configured to inject an airflow to the feeding pipe.
11. The particle diameter detection device according to claim 9, wherein a discharge valve is provided on the discharge pipe.
12. The particle diameter detection device according to any one of claims 1 to 11, wherein the particle diameter detection device further comprises a support rod for supporting the sample cell, and two ends of the support rod are respectively connected to the sample rod. The side wall of the process pipe is fixedly connected to the side wall of the sample cell.
13. The particle size detection device according to any one of claims 2 to 12, characterized in that the particle size detection device further comprises a sampling and dilution tube, and the sampling and dilution tube passes through the process pipe and the inlet pipe fluid Connected, a positive pressure powder suction device is provided at one end of the sampling dilution tube far from the process pipeline, and the positive pressure powder suction device blows part of the sampled substance powder in the process pipeline into the sample pool.
14. An atomizing powder system, comprising: an atomizing cavity, a main collection hopper, a communication pipe, and the particle size detecting device according to any one of claims 1 to 13, the atomizing cavity, the granules, The process pipe of the diameter detection device and the main collection hopper are in fluid communication with each other through the communication pipe.
15. The atomizing powder system according to claim 14, wherein the atomizing cavity comprises a control terminal for adjusting the particle size of the atomized powder, and the atomizing powder system further comprises a controller, The controller is signal-connected to a photodetector in the particle size detection device and the control terminal.
16. A method for atomizing and pulverizing, comprising:

    The atomizing cavity prepares atomized powder according to preset parameters, and the obtained atomized powder is sent to a main collection hopper through a process pipe and a communication pipe;

    Part of the atomized powder enters the communication pipe through an inflow pipe, a sample pool, and a return pipe in sequence, and a particle size detection mechanism detects the partially atomized powder passing through the sample pool and outputs a detection result;

    The controller compares the received detection result with a preset threshold, and adjusts a preset parameter of the atomization cavity according to the comparison result.
17. The method according to claim 16, wherein the preset parameters of the atomizing cavity include a liquid flow rate, an air flow rate, and a pressure value.

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