Gas explosion type micro-amount powder feeding device and powder feeding method thereof

Abstract

The present invention relates to the technical field of powder feeding devices, and in particular to a gas explosion type micro-powder feeding device and a powder feeding method thereof, comprising a powder feeding pipe and a first driving mechanism, wherein the powder feeding pipe is provided with a plurality of groups of powder feeding mechanisms along its axial direction, each group of the powder feeding mechanisms comprises a cylinder body provided on the powder feeding pipe and interconnected with the powder feeding pipe, a first valve is provided between the cylinder body and the powder feeding pipe, a piston matching the cylinder body is provided in the cylinder body, the first driving mechanism is transmission-connected with the piston and is used to control the displacement of the piston in the cylinder body, a powder storage mechanism and a one-way valve are provided on the cylinder body, when in use, a certain amount of powder is transported into the cylinder body by the powder storage mechanism, and then the displacement of the piston is controlled by the first driving mechanism and pressure is applied to the cylinder body, the first valve is opened, and the powder enters the powder feeding pipe under the action of pressure to realize powder feeding, so that powder feeding can be achieved by interval feeding between a plurality of groups of different powder feeding mechanisms as needed, and the particles are evenly mixed by gas explosion to meet the powder feeding demand.

Description

Technical Field

[0001] The invention relates to the technical field of powder feeding devices, and in particular to a gas explosion type micro-amount powder feeding device and a powder feeding method thereof. Background Art

[0002] When studying the particle deposition characteristics of gas-solid two-phase flow, most of the problems involve the problem of micro-powder feeding of 0.1-1g / min and the problem of small particle adhesion. In order to ensure the smooth progress of the experiment, uniform and continuous feeding is required. At present, the commonly used powder feeding devices mainly include screw feeding, pneumatic feeding or scraper feeding, etc., and the existing powder feeding devices have problems such as material bridging, agglomeration or powder accumulation in the feeding structure in the silo, which are difficult to solve, resulting in uneven or discontinuous powder feeding, which seriously affects the accuracy, stability, continuity and uniformity of the material delivery during the experiment, and directly affects the experimental results and conclusions. Summary of the invention

[0003] The technical problem to be solved by the present invention is: in order to solve the problem that the existing powder feeding device is uneven or discontinuous in powder feeding, which seriously affects the accuracy, stability, continuity and uniformity of the material conveying amount during the experiment, and directly affects the experimental results and experimental conclusions, a gas explosion type micro-powder feeding device and a powder feeding method thereof are now provided.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a gas explosion type micro-powder feeding device, including a powder feeding pipe and a first driving mechanism, a plurality of groups of powder feeding mechanisms are arranged on the powder feeding pipe along its axial direction, each group of the powder feeding mechanisms includes a cylinder body arranged on the powder feeding pipe and interconnected with the powder feeding pipe, a first valve is arranged between the cylinder body and the powder feeding pipe, a piston matching with the cylinder body is arranged in the cylinder body, the first driving mechanism is connected to the piston in a transmission manner and is used to control the displacement of the piston in the cylinder body, a powder storage mechanism and a one-way valve are arranged on the cylinder body, the storage mechanism is used to transport powder into the cylinder body, a second valve is arranged between the powder storage mechanism and the cylinder body, when the piston is close to the first valve, the one-way valve, the first valve and the second valve are in a closed state, and when the piston is away from the first valve, the one-way valve is in an open state. Compared with the prior art, in this solution, a certain amount of powder is transported into the cylinder by the powder storage mechanism, and then the piston displacement is controlled by the first driving mechanism to apply pressure to the cylinder, and the first valve is opened. The powder enters the powder conveying pipe under the action of pressure to realize powder feeding. In this way, powder can be fed at intervals between multiple groups of different powder conveying mechanisms as needed to meet the powder feeding needs.

[0005] In order to make the powder feeding more uniform, the cylinder body is further provided with an orifice plate, and the orifice plate is provided with a plurality of holes connected with the cylinder body, and the first valve is located between the piston and the orifice plate. By providing the orifice plate on the cylinder body, and the orifice plate having holes connected with each other, the powder in the cylinder body enters the powder conveying pipe through the holes on the orifice plate, so that the powder is sprayed into the powder conveying pipe more uniformly.

[0006] In order to prevent the powder from accumulating on the orifice plate, the orifice plate is further provided with a brush for removing the powder on the orifice plate, and the cylinder body is provided with a second driving mechanism for controlling the brush to swing back and forth on the orifice plate. The brush is driven to swing back and forth on the orifice plate by the second driving mechanism on the cylinder body, so that the brush removes the powder accumulated on the orifice plate.

[0007] In order to realize the powder storage mechanism, the powder storage mechanism further comprises a powder storage box and a spiral rod arranged on the cylinder body, the spiral rod is arranged in the powder storage box, and a third driving mechanism for driving the spiral rod to rotate is arranged on the powder storage box. The spiral rod is driven to rotate by the third driving mechanism, so as to realize the conveying of the powder in the powder storage box into the cylinder body, control the periodic rotation of the spiral rod, and replace the spiral rod with different pitches according to the particle size and the amount of powder to be fed.

[0008] Furthermore, each group of the powder conveying mechanism includes at least two cylinders arranged on the powder conveying pipe.

[0009] Since the cylinder provides a certain pressure for powder spraying, the force during spraying will cause impact on the cylinder, which will affect the connection strength between the cylinder and the powder conveying pipe in the long term. Furthermore, the cylinders on each group of the powder conveying mechanism are arranged opposite to each other in pairs. By setting the cylinders opposite to each other in pairs, the forces of the two cylinders arranged opposite to each other during spraying will offset each other, greatly reducing the force on the cylinder, thus ensuring that the cylinder is connected to the powder conveying pipe stably and reliably. The relative setting makes the particle impact more dispersed, more uniform, and not easy to brush the wall; it can also achieve force balance, making the operation smoother, vibration-free and low-noise.

[0010] To prevent the cylinder body from being damaged due to insufficient strength, further, two adjacent groups of powder conveying mechanisms are arranged at equal intervals. The powder conveying mechanisms can be arranged circumferentially or in layers, that is, they can be applied to a variety of powder feeding environments, greatly improving the adaptability of the powder feeding device.

[0011] In order to better control the spraying of the powder, a pressure gauge is further provided on the cylinder body. By providing the pressure gauge on the cylinder body, it is convenient for the staff to understand the pressure condition in the cylinder body during operation, and it is convenient for the staff to control and adjust.

[0012] In order to better understand the amount of powder transported in the powder conveying pipe, further, a flow meter is provided on the powder conveying pipe. By providing a flow meter on the powder conveying pipe, it is convenient for the staff to understand.

[0013] A powder feeding method using the gas explosion type micro-powder feeding device as described above:

[0014] In the initial state, the piston of each group of the powder conveying mechanism is at the initial position of the cylinder, and the first valve, the second valve and the one-way valve are closed;

[0015] In the working state, after one of the several groups of powder feeding mechanisms completes powder feeding, it enters the next cycle of powder feeding preparation, and at the same time, another group of the several groups of powder feeding mechanisms replaces the previous group to feed powder, and so on to perform powder feeding in a cycle. The powder spraying time and powder spraying amount of two adjacent powder feeding mechanisms are adjusted as needed to achieve uniform powder spraying.

[0016] The beneficial effect of the present invention is that when the gas explosion type micro-powder feeding device and the powder feeding method of the present invention are in use, a certain amount of powder is transported into the cylinder by the powder storage mechanism, and then the piston displacement is controlled by the first driving mechanism to apply pressure to the cylinder, and the first valve is opened. The powder enters the powder conveying pipe under the action of pressure to achieve powder feeding. In this way, powder is fed at intervals between multiple groups of different powder conveying mechanisms as needed, and the gas explosion method is used to evenly mix the particles to meet the powder feeding requirements, thereby avoiding uneven or discontinuous powder feeding of the existing powder feeding device, which seriously affects the accuracy, stability, continuity and uniformity of the material conveying amount during the experiment, and also directly affects the experimental results and conclusions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 The structure of the present invention is schematically shown in FIG. Figure 1 ;

[0019] Figure 2 The structure of the present invention is schematically shown in FIG. Figure 2 ;

[0020] Figure 3 yes Figure 1 Schematic diagram of the structure of the upper cylinder of the middle powder conveying pipe and the powder storage mechanism;

[0021] Figure 4 The structure of the orifice plate and the brush in the present invention is shown in FIG. Figure 1 ;

[0022] Figure 5 The structure of the orifice plate and the brush in the present invention is shown in FIG. Figure 2 .

[0023] In the figure: 1. powder conveying pipe, 2. first driving mechanism, 3. cylinder body, 4. first valve, 5. piston, 6. powder storage mechanism, 7. one-way valve, 8. second valve, 9. orifice plate, 10. hole, 11. brush, 12. second driving mechanism, 13. powder storage box, 14. screw rod, 15. third driving mechanism, 16. pressure gauge, 17. flow meter. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with embodiments:

[0025] The present invention is not limited to the following specific embodiments. A person skilled in the art can implement the present invention in various other specific embodiments according to the contents disclosed in the present invention, or any simple changes or modifications made to the design structure and ideas of the present invention fall within the protection scope of the present invention. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0028] like Figure 1-5As shown, a gas explosion type micro-powder feeding device includes a powder conveying pipe 1 and a first driving mechanism 2, wherein the first driving mechanism 2 here is a cylinder, and three groups of powder conveying mechanisms are arranged on the powder conveying pipe 1 along its axial direction, and the two adjacent groups of powder conveying mechanisms are arranged at equal intervals, and each group of the powder conveying mechanisms includes a cylinder body 3 arranged on the powder conveying pipe 1 and interconnected with the powder conveying pipe 1, and each group of the powder conveying mechanisms includes four cylinder bodies 3 arranged on the powder conveying pipe 1. The cylinder bodies 3 on each group of the powder conveying mechanism are arranged opposite to each other in pairs, a first valve 4 is arranged between the cylinder body 3 and the powder conveying pipe 1, a piston 5 matching it is arranged in the cylinder body 3, the first driving mechanism 2 is connected to the piston 5 in a transmission manner and is used to control the displacement of the piston 5 in the cylinder body 3, a powder storage mechanism 6 and a one-way valve 7 are arranged on the cylinder body 3, the storage mechanism is used to convey the powder into the cylinder body 3, a second valve 8 is arranged between the powder storage mechanism 6 and the cylinder body 3, when the piston 5 is close to the first valve 4, the one-way valve 7, the first valve 4 and the second valve 8 are in a closed state, and when the piston 5 is away from the first valve 4, the one-way valve 7 is in an open state. The one-way valve 7 here is a breathing valve. When the piston 5 moves away from the powder conveying pipe 1, the breathing valve automatically opens the powder conveying pipe, so that the pressure inside and outside the cylinder body 3 is equal.

[0029] The cylinder body 3 is provided with an orifice plate 9 , and the orifice plate 9 is provided with a plurality of holes 10 communicating with the cylinder body 3 . The first valve 4 is located between the piston 5 and the orifice plate 9 .

[0030] The orifice plate 9 is provided with a brush 11 for removing powder on the orifice plate 9, and the cylinder body 3 is provided with a second driving mechanism 12 for controlling the brush 11 to swing back and forth on the orifice plate 9. The second driving mechanism 12 here is a swing cylinder, and the brush 11 is fixed to the output end of the swing cylinder, so as to drive the brush 11 to brush back and forth on the orifice plate 9 and remove the powder accumulated on the orifice plate 9.

[0031] The powder storage mechanism 6 includes a powder storage box 13 and a screw rod 14 arranged on the cylinder body 3, wherein the screw rod 14 is arranged in the powder storage box 13, and a third driving mechanism 15 for driving the screw rod 14 to rotate is arranged on the powder storage box 13. The third driving mechanism 15 here is a servo motor, which is connected to the screw rod 14 through a coupling, so as to drive the screw rod 14 to rotate in the powder storage box 13 and transport the powder into the cylinder body 3.

[0032] The cylinder 3 is provided with a pressure gauge 16. The pressure gauge 16 is used to detect the pressure in the cylinder 3 when in working state. If the pressure is too high, the powder conveying pipe 1 and the cylinder 3 will be damaged. If the pressure is too low, the powder in the cylinder 3 cannot be ejected. Therefore, the pressure of the powder injection can be controlled according to the pressure gauge 16 to ensure stable and reliable powder injection.

[0033] The powder conveying pipe 1 is provided with a flow meter 17. The flow meter 17 is used to monitor the flow rate of the powder conveyed by the powder conveying pipe 1, and adjust the flow rate of the conveyed powder according to the monitoring of the flow meter 17 to meet the supply demand.

[0034] A powder feeding method using the above-mentioned gas explosion type micro-powder feeding device:

[0035] In the initial state, the piston 5 of each group of the powder conveying mechanism is in the initial position of the cylinder 3, and the first valve 4, the second valve 8 and the one-way valve 7 are closed;

[0036] In the working state, after one of the several groups of powder feeding mechanisms completes powder feeding, it enters the next cycle of powder feeding preparation, and at the same time, another group of the several groups of powder feeding mechanisms replaces the previous group to feed powder, and so on to perform cyclic powder feeding.

[0037] When the above-mentioned gas explosion type micro-powder feeding device and powder feeding method are used, first open the second valve 8 and connect the powder storage box 13 at the storage and distribution mechanism with the cylinder body 3, and drive the screw rod 14 to rotate through the servo motor at the third drive mechanism 15, and the powder in the powder storage box 13 is transported to the cylinder body 3 through the screw rod 14, and then close the second valve 8. At this time, the first valve 4 and the one-way valve 7 are in a closed state, and then control the cylinder at the first drive mechanism 2, and the cylinder drives the piston 5 to move in the cylinder body 3. By observing the pressure gauge 16 on the cylinder body 3, when the pressure in the cylinder body 3 reaches the required injection pressure, stop the displacement of the cylinder, and then control the second valve 8 to open, and the powder in the cylinder body 3 enters the powder conveying pipe 1 through the hole 10 on the orifice plate 9 through the pressure. Since the cylinder bodies 3 are arranged opposite to each other in pairs, the piston 5 is controlled to move periodically in the powder conveying pipe 1, and the first valve 4 and the second valve 8 are controlled to open and close periodically to ensure that the particles enter the piston 5 powder feeding device and are evenly dispersed and released, and the spiral powder feeding rod is controlled to rotate periodically to ensure continuous powder feeding S1.

[0038] The above-mentioned ideal embodiments of the present invention are for inspiration. Through the above-mentioned description, relevant staff can make various changes and modifications without departing from the technical idea of ​​the present invention. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A gas explosion type micro-powder feeding device, characterized in that: The invention comprises a powder conveying pipe (1) and a first driving mechanism (2), wherein the powder conveying pipe (1) is provided with a plurality of groups of powder conveying mechanisms along its axial direction, each group of the powder conveying mechanisms comprises a cylinder body (3) provided on the powder conveying pipe (1) and interconnected with the cylinder body (3), a first valve (4) is provided between the cylinder body (3) and the powder conveying pipe (1), a piston (5) matching the cylinder body (3) is provided in the cylinder body (3), the first driving mechanism (2) is drivingly connected to the piston (5) and is used to control the displacement of the piston (5) in the cylinder body (3), and a powder storage mechanism (6) and a one-way valve (7) are provided on the cylinder body (3). The powder storage mechanism (6) is used to convey powder into the cylinder (3). A second valve (8) is provided between the powder storage mechanism (6) and the cylinder (3). When the piston (5) is close to the first valve (4), the one-way valve (7), the first valve (4) and the second valve (8) are in a closed state. When the piston (5) is away from the first valve (4), the one-way valve (7) is in an open state. The one-way valve (7) is used to automatically open when the piston (5) moves away from the powder conveying pipe (1), so that the pressure inside and outside the cylinder (3) is equal. The powder storage mechanism (6) comprises a powder storage box (13) and a screw rod (14) arranged on the cylinder body (3); the screw rod (14) is arranged in the powder storage box (13); and a third driving mechanism (15) for driving the screw rod (14) to rotate is arranged on the powder storage box (13); When in use, the powder storage mechanism (6) conveys a certain amount of powder into the cylinder (3), and then controls the displacement of the piston (5) and applies pressure to the cylinder (3) through the first drive mechanism (2), opens the first valve (4), and the powder enters the powder conveying pipe (1) under the action of pressure, thereby achieving powder feeding.

2. The gas explosion type micro-powder feeding device according to claim 1, characterized in that: The cylinder body (3) is provided with an orifice plate (9), and the orifice plate (9) is provided with a plurality of holes (10) connected to the cylinder body (3). The first valve (4) is located between the piston (5) and the orifice plate (9).

3. The gas explosion type micro-powder feeding device according to claim 2, characterized in that: The orifice plate (9) is provided with a brush (11) for removing powder on the orifice plate (9), and the cylinder body (3) is provided with a second driving mechanism (12) for controlling the brush (11) to swing back and forth on the orifice plate (9).

4. The gas explosion type micro-powder feeding device according to claim 1, characterized in that: Each group of the powder conveying mechanisms comprises at least two cylinder bodies (3) arranged on the powder conveying pipe (1).

5. The gas explosion type micro-powder feeding device according to claim 4, characterized in that: The cylinder bodies (3) on each group of the powder conveying mechanisms are arranged opposite to each other in pairs.

6. The gas explosion type micro-powder feeding device according to any one of claims 1 to 5, characterized in that: The two adjacent groups of powder conveying mechanisms are arranged at equal intervals.

7. The gas explosion type micro-powder feeding device according to claim 1, characterized in that: The cylinder body (3) is provided with a pressure gauge (16).

8. The gas explosion type micro-powder feeding device according to claim 1, characterized in that: The powder conveying pipe (1) is provided with a flow meter (17).

9. A powder feeding method using the gas explosion type micro-powder feeding device according to any one of claims 1 to 8, characterized in that: In the initial state, the piston (5) of each group of the powder conveying mechanism is in the initial position of the cylinder (3), and the first valve (4), the second valve (8) and the one-way valve (7) are closed; In the working state, after one of the several groups of powder feeding mechanisms completes powder feeding, it enters the next cycle of powder feeding preparation, and at the same time, another group of the several groups of powder feeding mechanisms replaces the previous group to feed powder, and so on to perform cyclic powder feeding.

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