Powder mixing device

Abstract

The invention relates to the technical field of material mixing devices, and discloses a powder mixing device, an air inlet bin is connected to the bottom of a stock bin, and the bottom of the stock bin communicates with the air inlet bin through a first valve. The cylinder body is connected with the stock bin, and a discharge port is formed in the cylinder body. The first core body is arranged in the cylinder body, a flow hole is formed in the extending direction of the cylinder body, a plurality of first convex parts are downwards and obliquely arranged on the inner wall of the flow hole, and a first pit slot is formed between each first convex part and the inner wall of the flow hole; the second core body is arranged in the flow hole, a mixing flow channel is formed between the outer wall of the second core body and the inner wall of the flow hole, and the discharging opening communicates with the top of the mixing flow channel; a plurality of second convex parts are arranged on the outer wall of the first core body in a downward inclined manner; and a second pit slot is formed between each second convex part and the outer wall of the second core body. And the retention time of the airflow mixed with the powder in the mixing runner is delayed by the first convex part and the second convex part, so that enough time is provided for mixing the powder, and the mixing effect of the powder is further enhanced.

Description

Technical Field

[0001] The present application relates to the technical field of material mixing devices, and in particular to a powder mixing device. Background Art

[0002] When using powders, it is sometimes necessary to mix multiple powders. The existing powder mixing method generally places multiple powders in a high-speed mixer, which continuously stirs the powders inside to mix the multiple powders together.

[0003] Because powders are sticky, it's difficult to evenly mix them simply by tumbling them. To achieve a more even mix, the current solution is to initially mix the powders and then use airflow to move them through a mixing channel, fluidizing the powders. This reduces the stickiness of the powders and allows the airflow mixed with the powders to mix more evenly as it flows through the mixing channel.

[0004] However, the flow time of the airflow mixed with powders in the mixing channel is short, which makes the mixing time between the powders short, and further does not allow the powders to have enough time to mix, resulting in poor mixing effect.

[0005] Therefore, how to solve or improve the problem in the related art that the powders do not have enough time to mix, resulting in poor mixing effect, has become an important technical problem to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the present application provides a powder mixing device to solve or improve the problem that the powders do not have enough time to mix, resulting in poor mixing effect.

[0007] In a first aspect, the present application provides a powder mixing device, comprising:

[0008] A silo suitable for containing powder;

[0009] an air inlet bin connected to the bottom of the silo and suitable for introducing gas;

[0010] a first valve, the bottom of the silo is connected to the air inlet silo through the first valve;

[0011] The bottom of the cylinder is connected to the top of the silo, and the cylinder is provided with a discharge port;

[0012] a first core disposed in the cylinder, the first core having a flow hole formed along an extension direction of the cylinder, the inner wall of the flow hole having a plurality of first protrusions, the first protrusions being sequentially arranged along the extension direction of the cylinder, and the first protrusions being inclined downward to form a first groove with the inner wall of the flow hole;

[0013] The second core body is arranged in the flow hole, and a mixing channel is formed between the outer wall of the second core body and the inner wall of the flow hole, and the discharge port is connected with the top of the mixing channel; a plurality of second protrusions are provided on the outer wall of the first core body, and each second protrusion is arranged in sequence along the extension direction of the cylinder, and each second protrusion is arranged to be inclined downward to form a second groove between the outer wall of the second core body.

[0014] Optionally, it also includes:

[0015] The cover body includes an outer cover body and an inner cover body connected to each other, the outer cover body is sleeved on the periphery of the inner cover body, an annular cavity is formed between the inner wall of the outer cover body and the outer wall of the inner cover body, the outer cover body is connected to the top of the cylinder, and the outer cover body is connected to the first feed port;

[0016] The second valve is connected to the outer cover and divides the annular cavity into a feed cavity and a discharge cavity. The first feed port is connected to the feed cavity, and the discharge cavity is connected to the top of the mixing channel.

[0017] Optionally, the second valve includes:

[0018] a plurality of baffles, each of the baffles being disposed within the annular cavity and being rotatably connected to the outer cover so as to be rotatable between a first position and a second position, and each of the baffles being evenly disposed along the circumference of the annular cavity;

[0019] The first driving mechanism is connected to each baffle, and the first driving mechanism is used to drive each baffle to rotate, wherein:

[0020] When the baffles are rotated to the first position, two adjacent baffles abut against each other, so that the baffles cut off the feed cavity and the discharge cavity;

[0021] When the baffles are rotated to the second position, a material passing gap is formed between every two adjacent baffles.

[0022] Optionally, a feed channel is provided on the second core along the extension direction of the cylinder, a second feed port is connected to the inner cover, and the second feed port is communicated with the top of the feed channel, and the powder mixing device further includes:

[0023] A one-way valve is provided, wherein the bottom of the feed channel is connected to the silo through the one-way valve, so that the feed channel is unidirectionally connected to the silo.

[0024] Optionally, it also includes:

[0025] A heat exchange cavity is connected to the inner cover body, a heat exchange flow channel is provided in the heat exchange cavity, a liquid inlet pipe and a liquid outlet pipe are provided on the heat exchange cavity, the liquid inlet pipe and the liquid outlet pipe are respectively connected to the heat exchange flow channel, a channel is provided on the heat exchange cavity, and the second feed port is connected to the top of the feed channel through the channel.

[0026] Optionally, the air inlet bin is provided with a plurality of air inlets, each of which is sequentially arranged along the circumference of the air inlet bin, and the powder mixing device further comprises:

[0027] An air intake pipeline is arranged around the periphery of the air intake bin, each of the air inlets is connected to the air intake pipeline respectively, and the air intake pipeline is suitable for introducing gas.

[0028] Optionally, a plurality of discharge ports are provided, and each of the discharge ports is sequentially provided along the circumference of the cylinder, and the powder mixing device further comprises:

[0029] The discharge pipeline is arranged around the outer periphery of the cylinder, and each of the discharge ports is communicated with the discharge pipeline respectively.

[0030] Optionally, an exhaust port is provided on the cylinder, and the exhaust port is connected to the top of the mixing channel. The powder mixing device also includes a filtering device, an exhaust pipe and an exhaust pump. The exhaust port is connected to the exhaust pump through the filtering device and the exhaust pipe in turn. The filtering device is used to filter powder, and the exhaust pump is used to extract the gas in the exhaust pipe.

[0031] Optionally, a first opening is provided at the bottom of the silo, a second opening is provided at the top of the air inlet silo, and the first valve includes:

[0032] A valve core, the top of which is connected to the first opening, and the bottom of which is connected to the second opening. The valve core is made of a flexible material and has a plurality of vent holes formed thereon. The first opening can communicate with the second opening through the vent holes.

[0033] The second driving mechanism is connected to the valve core and is suitable for compressing the valve core inward to reduce the opening of the vent hole.

[0034] Optionally, it also includes:

[0035] base;

[0036] A vibration device is arranged on the base, and the air intake bin is arranged on the vibration device, and the vibration device is used to generate vibration for the air intake bin.

[0037] The present application provides a powder mixing device, wherein an air inlet bin is connected to the bottom of a silo for storing powder, and the air inlet bin is used to introduce gas. The bottom of the silo is connected to the air inlet bin via a first valve. The bottom of the barrel is connected to the top of the silo. A first core is disposed within the barrel, and a flow hole is defined within the first core. The flow hole is arranged along the extension direction of the barrel, connecting the flow hole to the silo. A discharge port is provided on the barrel, connecting the discharge port to the top of the flow hole, and the bottom of the flow hole is connected to the top of the silo.

[0038] When two powders need to be mixed, each powder is placed separately in a silo. Gas is then continuously introduced into the inlet silo. The gas enters the silo from the bottom through the first valve and continues to flow upward within the silo, carrying the powders upward with it. The powders are then mixed with the airflow, which enters the mixing channel between the first core and the inner wall of the flow hole from the bottom of the mixing channel, where they flow upward.

[0039] Because the inner wall of the flow hole is provided with downwardly inclined first protrusions, first grooves are formed between the first protrusions and the inner wall of the flow hole. When the powder-mixed airflow flows through the mixing channel, it is partially blocked by each first protrusion and enters the corresponding first groove. This portion of the powder-mixed airflow first flows toward the bottom of the groove, then returns and flows out of the first groove after reaching the bottom. This partially powder-mixed airflow forms vortices and backflows in the first grooves, causing the powder particles mixed in the airflow to tumble against each other, enhancing the powder mixing effect. Furthermore, the blocking effect of each first protrusion delays the residence time of the powder-mixed airflow in the mixing channel. Furthermore, because the first protrusions are tilted downward, the powder-mixed airflow flows downward upon exiting the first groove, further delaying its residence time in the mixing channel, allowing sufficient time for the powder particles to mix, thereby further enhancing the powder mixing effect.

[0040] Because the outer wall of the second core is provided with downwardly inclined second protrusions, second grooves are formed between the second protrusions and the outer wall of the second core. When the powder-mixed airflow flows through the mixing channel, it is partially blocked by each second protrusion and enters the corresponding second groove. This portion of the powder-mixed airflow first flows toward the bottom of the groove, then returns and flows out of the second groove after reaching the bottom. This partially powder-mixed airflow thus forms vortices and backflows in the second grooves, causing the powder particles in the airflow to tumble against each other, enhancing the powder mixing effect. Furthermore, the blocking effect of each second protrusion delays the residence time of the powder-mixed airflow in the mixing channel. Furthermore, because the second protrusions are tilted downward, the powder-mixed airflow flows downward upon exiting the second groove, further delaying its residence time in the mixing channel, allowing sufficient time for the powder particles to mix, thereby further enhancing the powder mixing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the specific implementation methods of this application or the technical solutions in related technologies, the following is a brief introduction to the drawings required for use in the specific implementation methods or related technical descriptions. Obviously, the drawings described below are some implementation methods of this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0042] Figure 1 This is an isometric view of a powder mixing device according to an embodiment of the present application;

[0043] Figure 2 This is a front view of a powder mixing device according to an embodiment of the present application;

[0044] Figure 3 This is a cross-sectional view of a powder mixing device according to an embodiment of the present application;

[0045] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0046] Figure 5 This is a schematic diagram of the second valve structure of a powder mixing device according to an embodiment of the present application;

[0047] Figure 6 for Figure 5 Enlarged view of point B in the middle;

[0048] Figure 7 This is a schematic diagram of the first valve structure of a powder mixing device according to an embodiment of the present application;

[0049] Figure 8 for Figure 7 Enlarged view of point C in the middle;

[0050] Figure 9 This is a top view of a powder mixing device according to an embodiment of the present application with a portion of the cover hidden;

[0051] Figure 10 This is a schematic structural diagram of a base and a vibration device of a powder mixing device according to an embodiment of the present application.

[0052] Figure 11 This is a schematic diagram of the connection between the liquid inlet pipe and the liquid outlet pipe of a powder mixing device in an embodiment of the present application.

[0053] Description of reference numerals:

[0054] 1. Material silo; 2. Air inlet silo; 21. Air inlet; 3. First valve; 31. Valve core; 3101. Air vent; 32. Upper swivel; 33. First rotor; 331. Second gear; 34. First connecting member; 35. First extrusion strip; 36. Third motor; 361. Third gear; 37. Lower swivel; 38. Second rotor; 381. Fourth gear; 39. Second connecting member; 310. Second extrusion strip; 311. Fourth motor; 3111. Fifth gear; 4. Cylinder Body; 41, discharge port; 5, first core; 51, first convex portion; 52, first pit; 53, perforation; 6, second core; 61, second convex portion; 62, second pit; 63, feed channel; 631, cone; 7, cover; 71, outer cover; 711, outer cylinder; 7111, feed cavity; 7112, discharge cavity; 712, outer cover; 713, first feed port; 72, inner cover; 721, inner cylinder; 722, inner cover; 7221, through hole; 723, Second feed port; 8, second valve; 81, first drive mechanism; 811, rotating ring; 8111, sliding shaft; 8112, teeth; 812, second motor; 8121, first gear; 813, connecting bar; 8131, chute; 82, baffle; 821, rotating shaft; 9, one-way valve; 91, sphere; 92, first elastic member; 93, mounting seat; 10, heat exchange chamber; 101, channel; 102, liquid inlet pipe; 1021, first three-way valve; 1022, first cooling pipe; 1023, first heat pipe; 103, liquid outlet pipe; 1031, second three-way valve; 1032, second cold pipe; 1033, second heat pipe; 11, air inlet pipe; 111, air inlet interface; 12, discharge pipe; 121, discharge interface; 13, filter device; 14, exhaust pipe; 15, exhaust pump; 16, base; 17, vibration device; 171, first vibration seat; 172, second vibration seat; 173, second elastic member; 174, third elastic member; 175, eccentric member. DETAILED DESCRIPTION

[0055] To make the purpose, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of this application.

[0056] The following combination Figures 1 to 11 , describing the embodiments of the present application.

[0057] According to an embodiment of the present application, on the one hand, a powder mixing device is provided, such as Figure 1 and Figure 2As shown, it includes a silo 1, an air inlet silo 2, a first valve 3, a cylinder 4, a first core 5 and a second core 6.

[0058] The air inlet bin 2 is connected to the bottom of the silo 1. The silo 1 is used to store powder, and the air inlet bin 2 is used to introduce gas. The bottom of the silo 1 is connected to the air inlet bin 2 via a first valve 3. When the first valve 3 is opened and gas is introduced into the air inlet bin 2, the gas can pass through the first valve 3 and enter the silo 1 from the bottom.

[0059] The bottom of the cylinder 4 is connected to the top of the silo 1, so that the cylinder 4 is connected to the silo 1. Figure 3 As shown, the first core 5 is disposed within the barrel 4. A flow hole is formed within the first core 5. The flow hole is disposed along the extension direction of the barrel 4, penetrating the first core 5 so as to communicate with the silo 1. In other words, the flow hole is disposed vertically. The discharge port 41 is connected to the top of the flow hole, and the bottom of the flow hole is connected to the top of the silo 1.

[0060] A plurality of first protrusions 51 are provided on the inner wall of the flow hole, and the first protrusions 51 are sequentially provided along the extension direction of the cylinder 4. The first protrusions 51 are arranged to be tilted downward, so that a first groove 52 is formed between the first protrusions 51 and the inner wall of the flow hole.

[0061] The second core 6 is disposed within the flow hole, forming a mixing channel extending upward from bottom to top between the outer wall of the second core 6 and the inner wall of the flow hole. Since the discharge port 41 is connected to the top of the flow hole, the discharge port 41 is connected to the top of the mixing channel; since the bottom of the flow hole is connected to the top of the silo 1, the bottom of the mixing channel is connected to the top of the silo 1.

[0062] A plurality of second protrusions 61 are provided on the outer wall of the second core 6, and the second protrusions 61 are sequentially provided along the extension direction of the cylinder 4. The second protrusions 61 are arranged downwardly inclined, so that a second groove 62 is formed between each second protrusion 61 and the outer wall of the second core 6.

[0063] Thus, when two powders need to be mixed, each powder is placed separately into silo 1. Gas is then continuously introduced into air inlet silo 2. The gas enters from the bottom of silo 1 through first valve 3 and continues to flow upward within silo 1, driving the powder upward along with it. The powder is then mixed with the air flow and enters the mixing channel from the bottom, where it flows upward.

[0064] Due to the presence of each first protrusion 51, the powder-mixed airflow is partially blocked by each first protrusion 51 as it flows through the mixing channel, entering the corresponding first recess 52. This portion of the powder-mixed airflow first flows toward the bottom of the first recess 52, then returns and flows out of the first recess 52 after reaching the bottom. Consequently, the powder-mixed airflow forms vortices and backflows within the first recess 52, causing the powder particles in the airflow to tumble and tumble, enhancing the powder mixing effect. Furthermore, the blocking effect of each first protrusion 51 delays the residence time of the powder-mixed airflow in the mixing channel. Furthermore, because the first protrusions 51 are tilted downward, the powder-mixed airflow flows downwardly upon exiting the first recess 52, further delaying its residence time in the mixing channel. This allows sufficient time for the powder particles to mix, further enhancing the powder mixing effect.

[0065] Similarly, due to the presence of each second protrusion 61, the powder-mixed airflow is partially blocked by each second protrusion 61 as it flows through the mixing channel, entering the corresponding second groove 62. This portion of the powder-mixed airflow first flows toward the bottom of the second groove 62, then returns and flows out of the second groove 62 after reaching the bottom. Consequently, the powder-mixed airflow forms vortices and backflows within the second groove 62, causing the powder particles mixed in the airflow to tumble against each other, enhancing the powder mixing effect. Furthermore, the blocking effect of each second protrusion 61 delays the residence time of the powder-mixed airflow in the mixing channel. Furthermore, because the second protrusion 61 is tilted downward, the powder-mixed airflow flows downwardly upon exiting the second groove 62, further delaying its residence time in the mixing channel. This allows sufficient time for the powder particles to mix, further enhancing the powder mixing effect.

[0066] Moreover, since the air flow mixed with powder flows from bottom to top, under the action of gravity, the residence time of part of the air flow mixed with powder in the mixing channel is delayed, which also enhances the mixing effect of the powder to a certain extent.

[0067] After the airflow mixed with powder flows from bottom to top through the mixing channel to the top, the powder particles are fully mixed, and then the airflow mixed with powder is discharged through the discharge port 41, thereby obtaining a powder mixture with better mixing effect.

[0068] It is worth mentioning that the mixing of powders is not limited to two kinds of powders, but more kinds of powders can be mixed. All that is required is to put all kinds of powders into the bin before mixing.

[0069] The outer wall of the first core 5 can be closely connected to the inner wall of the cylinder 4 to ensure that the airflow mixed with the powder can completely enter the mixing channel after entering the cylinder 4.

[0070] In order to facilitate the addition of powder into the silo 1 , a feeding window may be provided on the silo 1 .

[0071] For the communication between the discharge port 41 and the mixing channel, a through hole 53 is opened on the first core 5. The through hole 53 passes through the inner wall of the flow hole and is connected to the mixing channel. The discharge port 41 passes through the cylinder 4 and is aligned with the through hole 53 for communication.

[0072] In an optional embodiment, the first convex portion 51 and the second convex portion 61 are staggered in the horizontal direction to avoid the gap between the first convex portion 51 and the second convex portion 61 being too small, which may cause the airflow to not flow normally.

[0073] In order to facilitate the addition of powder into the silo 1 , a feeding window may be provided on the silo 1 .

[0074] As an optional embodiment, Figures 1 to 3 As shown, the powder mixing device further includes a cover 7 and a second valve 8.

[0075] The housing 7 comprises an outer housing 71 and an inner housing 72. The outer housing 71 and the inner housing 72 are interconnected, with the outer housing 71 positioned within the periphery of the inner housing 72. An annular cavity is formed between the inner wall of the outer housing 71 and the outer wall of the inner housing 72. The outer housing 71 is connected to the top of the cylinder 4, thereby connecting the annular cavity to the interior of the cylinder 4. A first feed port 713 is provided on the outer housing 71, which communicates with the annular cavity.

[0076] The second valve 8 is connected to the outer housing 71 and divides the annular cavity into a feed cavity 7111 and a discharge cavity 7112. When the second valve 8 is open, the feed cavity 7111 and the discharge cavity 7112 are connected through the second valve 8. When the second valve 8 is closed, the feed cavity 7111 and the discharge cavity 7112 are disconnected.

[0077] The discharge cavity 7112 is located below the feed cavity 7111, and the first feed port 713 is connected to the feed cavity 7111. The discharge cavity 7112 is connected to the barrel 4. Since the mixing channel passes through the first core 5 along the extension direction of the barrel 4, the discharge cavity 7112 is connected to the top of the mixing channel.

[0078] With this arrangement, when powder needs to be added to the silo 1, the second valve 8 can be opened, connecting the feed chamber 7111 and the discharge chamber 7112 through the second valve 8. Powder is then added from the first feed port 713, enters the feed chamber 7111, passes through the second valve 8, and enters the discharge chamber 7112. The powder then falls from the bottom of the discharge chamber 7112 into the mixing channel, flows through the mixing channel, and enters the silo 1.

[0079] When powder mixing is performed, the second valve 8 is closed to disconnect the feed chamber 7111 and the discharge chamber 7112 , thereby preventing the airflow mixed with powder from passing through the second valve 8 into the feed chamber 7111 and then being ejected from the first feed port 713 .

[0080] With this arrangement, powder can be added to the silo 1 by utilizing the mixing channel, without the need for additional feeding channels 101 or inlets, thus simplifying the structure.

[0081] It is worth noting that since the first convex portion 51 and the second convex portion 61 are both arranged to be inclined downward, when the powder falls in the mixing channel under the action of its own gravity, it can slide down along the first convex portion 51 and the second convex portion 61, so that the first convex portion 51 and the second convex portion 61 have little effect on the falling speed of the powder, that is, the effect on the feeding speed is small.

[0082] Specifically, the outer cover 71 includes an outer cylinder 711 and an outer cover 712 covering one end of the outer cylinder 711. The end of the outer cylinder 711 facing away from the outer cover 712 is connected to the top of the cylinder 4. The first feed port 713 is connected to the outer cover 712 and passes through the outer cover 712. The outer cover 712 is provided with a first mounting opening.

[0083] The inner housing 72 includes an inner cylinder 721 and an inner cover 722 disposed on one end of the inner cylinder 721. The edge of the inner cylinder 721 at the end away from the inner cover 722 is connected to the edge of the first mounting opening. An annular cavity is formed between the inner wall of the outer cylinder 711 and the outer wall of the inner cylinder 721. The second core 6 is connected to the inner cover 722.

[0084] In an optional embodiment, if Figure 5 、 Figure 6 and Figure 9 As shown, the second valve 8 includes a first drive mechanism 81 and a plurality of baffles 82. Each baffle 82 is disposed within the annular cavity and rotatably connected to the outer housing 71, enabling each baffle 82 to rotate between a first position and a second position. The baffles 82 are evenly arranged along the circumference of the annular cavity. Each baffle 82 is connected to the first drive mechanism 81, enabling the first drive mechanism 81 to drive each baffle 82 to rotate between the first position and the second position.

[0085] When each baffle 82 rotates to the first position, each adjacent baffle 82 abuts against each other, thereby forming an annular baffle 82 along the circumference of the annular cavity, thereby dividing the annular cavity into a feed cavity 7111 and a discharge cavity 7112. When each baffle 82 rotates to the second position, each adjacent baffle 82 separates, thereby forming a material flow gap between each adjacent baffle 82, allowing powder in the feed cavity 7111 to enter the discharge cavity 7112 through the material flow gap.

[0086] With this arrangement, when powder needs to be added to the silo 1, the first drive mechanism 81 drives each baffle 82 to rotate to the second position, forming a material-passing gap between each pair of adjacent baffles 82. At this point, the second valve 8 opens. Powder is then added through the first feed port 713, enters the feed chamber 7111, passes through the material-passing gap, and enters the discharge chamber 7112. The powder then falls from the bottom of the discharge chamber 7112 into the mixing channel, flows through the mixing channel, and enters the silo 1.

[0087] When powder mixing is performed, the first driving mechanism 81 is used to drive each baffle 82 to rotate to the first position, so that each baffle 82 is abutted end to end along the circumference of the annular cavity to form an annular baffle 82, and the feed cavity 7111 and the discharge cavity 7112 are cut off. At this time, the second valve 8 is closed to prevent the airflow mixed with powder from passing through the second valve 8 into the feed cavity 7111 and then being ejected from the first feed port 713.

[0088] The first driving mechanism 81 may include a plurality of first motors, each of which is in transmission connection with each baffle 82 in a one-to-one correspondence, and each first motor is used to drive its corresponding baffle 82 to rotate between the first position and the second position.

[0089] In some embodiments, such as Figure 5 and Figure 6 As shown, the first drive mechanism 81 includes a rotating ring 811, a second motor 812, and a plurality of connecting bars 813. The second motor 812 is connected to the outer housing 71. A rotating shaft 821 is connected to each baffle 82. The outer housing 71 is provided with a plurality of first rotating holes, which are evenly spaced along the circumference of the outer housing 71. Each rotating shaft 821 is rotatably connected to a corresponding first rotating hole and extends out of the outer housing 71 through the first rotating hole. The end of each rotating shaft 821 extending out of the outer housing 71 is fixedly connected to one end of a connecting bar 813.

[0090] The rotating ring 811 is sleeved on the periphery of the outer cover 71 and can rotate around the outer cover 71. The second motor 812 is transmission-connected to the rotating ring 811, so that the second motor 812 can drive the rotating ring 811 to rotate.

[0091] The rotating ring 811 is provided with a plurality of sliding shafts 8111, and the sliding shafts 8111 are evenly arranged along the circumference of the rotating ring 811. Each connecting bar 813 is provided with a sliding groove 8131, and the sliding groove 8131 is arranged along the length direction of the connecting bar 813. Each sliding shaft 8111 is correspondingly inserted into a sliding groove 8131, so that the sliding shaft 8111 can slide along the sliding groove 8131.

[0092] The sliding shafts 8111 and the rotating shaft 821 are staggered in the horizontal direction, and the connecting bars 813 are tilted. Thus, when the second motor 812 drives the rotating circle 811 to rotate, each sliding shaft 8111 slides along its corresponding sliding groove 8131, thereby changing the tilt angle of each connecting bar 813 relative to the horizontal plane, thereby driving the rotating shaft 821 to rotate, so that the baffle 82 rotates between the first position and the second position.

[0093] A plurality of second rotating holes may also be provided on the inner cover body 72 , and the second rotating holes are evenly arranged along the circumference of the inner cover body 72 . The second rotating holes are coaxially arranged in a one-to-one correspondence with the first rotating holes, and one end of each rotating shaft 821 away from the connecting bar 813 is rotatably connected to the second rotating hole.

[0094] For the transmission connection between the second motor 812 and the rotating circle 811, teeth 8112 can be set on the rotating circle 811, and a first gear 8121 that cooperates with the teeth 8112 is set on the motor shaft of the second motor 812, so that the second motor 812 drives the first gear 8121 to rotate, which can drive the rotating circle 811 to rotate.

[0095] In an optional embodiment, if Figure 3 As shown, a feed channel 63 is provided on the second core 6. The feed channel 63 is opened along the extension direction of the cylinder 4 and passes through the second core 6. That is, the top of the feed channel 63 passes through the top of the second core 6, and the bottom of the feed channel 63 passes through the bottom of the second core 6. The top of the second core 6 is connected to the inner cover 72, and the inner cover 72 is connected to the second feed port 723. The second feed port 723 is connected to the top of the feed channel 63.

[0096] like Figure 4 As shown, the powder mixing device also includes a one-way valve 9. The bottom of the feed channel 63 is connected to the silo 1 through the one-way valve 9, so that the feed channel 63 is unidirectionally guided to the silo 1, that is, the material can enter the silo 1 from the feed channel 63 through the one-way valve 9, but cannot enter the feed channel 63 from the silo 1 through the one-way valve 9.

[0097] When powder needs to be added to the silo 1 , the powder can be added from the second feed port 723 . After the powder enters the feed channel 63 , it enters the silo 1 through the one-way valve 9 .

[0098] When powder mixing is performed, the one-way valve 9 can prevent the airflow mixed with powder from entering the feed channel 63 and then being ejected from the second feed port 723 .

[0099] With this arrangement, different powders that need to be mixed can be added from the first feed port 713 and the second feed port 723 respectively, and then the powders added from the first feed port 713 and the second feed port 723 can eventually enter the silo 1.

[0100] Specifically, the one-way valve 9 includes a ball 91, a first elastic member 92, and a mounting seat 93. The mounting seat 93 is connected to the inner housing 72 and is located below the feed channel 63. The bottom of the feed channel 63 is provided with a tapered surface 631. The ball 91 is connected to the mounting seat 93 via the first elastic member 92. Under the elastic force of the first elastic member 92, the ball 91 abuts against the tapered surface 631, thereby sealing the bottom of the feed channel 63.

[0101] Thus, when the powder enters the feed channel 63, the powder presses down on the sphere 91, compressing the first elastic member 92. The sphere 91 leaves the conical surface 631, allowing the powder to fall normally and enter the silo 1. During mixing, the airflow mixed with the powder flows upward, pressing the sphere 91 against the conical surface 631. The sphere 91 cannot leave the conical surface 631, and the airflow mixed with the powder cannot enter the feed channel 63.

[0102] The first elastic member 92 may be a spring.

[0103] In a further embodiment, Figure 3 and Figure 5 As shown, the powder mixing device also includes a heat exchange chamber 10, which is disposed within and connected to the inner housing 72. A heat exchange channel is disposed within the heat exchange chamber 10, and a liquid inlet pipe 102 and a liquid outlet pipe 103 are disposed on the heat exchange chamber 10. The liquid inlet pipe 102 and the liquid outlet pipe 103 are respectively connected to the heat exchange channel. A channel 101 is disposed on the heat exchange chamber 10, and a second feed port 723 is connected to the heat exchange chamber 10. The second feed port 723 is connected to the top of the feed channel 63 through the channel 101 on the heat exchange chamber 10.

[0104] The heat exchange medium can enter the heat exchange channel through the liquid inlet pipe 102 and then be discharged through the liquid outlet pipe 103. Because the heat exchange cavity 10 is connected to the inner housing 72, the heat exchange medium can exchange heat with the inner housing 72 as it flows through the heat exchange channel, thereby exchanging heat with the annular cavity. Because the channel 101 is provided on the heat exchange cavity 10, the heat exchange medium can exchange heat with the channel 101 as it flows through the heat exchange channel.

[0105] With this arrangement, when powder is added to the first feed port 713 and the second feed port 723, a heat exchange medium can be continuously introduced into the liquid inlet, so that the powder exchanges heat with the heat exchange medium when flowing through the annular cavity and the channel 101, thereby being able to adjust the temperature of the powder flowing through the annular cavity and the channel 101 as needed to achieve a better mixing effect.

[0106] Specifically, the heat exchange cavity 10 is connected to the inner cover 722 and is located in the inner cylinder 721. The outer wall of the heat exchange cavity 10 is in contact with the inner wall of the inner cylinder 721. The inner cover 722 is provided with a through hole 7221, and the channel 101 on the heat exchange cavity 10 is connected to the through hole 7221.

[0107] In some embodiments, such as Figure 11 As shown, the liquid inlet pipe 102 is connected to the first cold pipe 1022 and the first heat pipe 1023 respectively through the first three-way valve 1021. That is, the three interfaces of the first three-way valve 1021 are respectively connected to the liquid inlet pipe 102, the first cold pipe 1022, and the first heat pipe 1023. In this arrangement, the first three-way valve 1021 can be used to select whether the first cold pipe 1022 is connected to the liquid inlet pipe 102 or the first heat pipe 1023 is connected to the liquid inlet pipe 102, thereby selecting whether to pass the cold medium or the hot medium into the liquid inlet pipe 102.

[0108] Correspondingly, the liquid outlet pipe 103 is connected to the second cold pipe 1032 and the second heat pipe 1033 respectively through the second three-way valve 1031. That is, the three interfaces of the second three-way valve 1031 are respectively connected to the liquid outlet pipe 103, the second cold pipe 1032, and the second heat pipe 1033. In this configuration, the second three-way valve 1031 can be used to select whether the second cold pipe 1032 is connected to the liquid outlet pipe 103 or the second heat pipe 1033 is connected to the liquid outlet pipe 103, thereby selectively discharging the cold medium or the hot medium into the liquid outlet pipe 103.

[0109] A first temperature sensor is provided in the mixing channel for detecting the temperature in the mixing channel. A second temperature sensor is provided in the feed channel 63 for detecting the temperature in the feed channel 63 .

[0110] As an optional embodiment, Figure 3 As shown, the air inlet bin 2 is provided with a plurality of air inlets 21, and each air inlet 21 is sequentially arranged along the circumference of the air inlet bin 2. Each air inlet 21 is communicated with the interior of the air inlet bin 2 respectively.

[0111] The powder mixing device also includes an air inlet pipe 11. The air inlet pipe 11 is circular and is arranged around the periphery of the air inlet bin 2. Each air inlet port 21 is connected to the air inlet pipe 11 and is connected to the interior of the air inlet pipe 11. An air inlet interface 111 is provided on the air inlet pipe 11. Thus, after gas is introduced from the air inlet interface 111, the gas enters the air inlet bin 2 through each air inlet port 21 as it circulates within the air inlet pipe 11. When the air flow enters the air inlet bin 2 through each air inlet port 21, it enters from different directions along the circumference of the air inlet bin 2, making the air flow smoother.

[0112] As an optional embodiment, Figure 1As shown, there are multiple discharge ports 41 on the cylinder 4, and each discharge port 41 is arranged in sequence along the circumference of the cylinder 4. The powder mixing device also includes a discharge pipeline 12, which is circular and arranged around the outer periphery of the cylinder 4. Each discharge port 41 is connected to the discharge pipeline 12 and is connected to the top of the mixing flow channel. A discharge interface 121 is provided on the discharge pipeline 12. In this way, after the airflow mixed with powder reaches the top of the mixing flow channel, it enters the discharge pipeline 12 through each discharge port 41 respectively, and then flows through the discharge pipeline 12 and is discharged and collected from the discharge interface 121. The airflow mixed with powder enters the discharge pipeline 12 from different directions along the circumference of the cylinder 4, making the discharge smoother.

[0113] The first core 5 is provided with a plurality of through-holes 53 . Each through-hole 53 passes through the inner wall of the flow hole and is connected with the top of the mixing flow channel. Each discharge port 41 is aligned and connected with a corresponding through-hole 53 .

[0114] As an optional embodiment, Figure 1 As shown, the cylinder 4 is provided with an exhaust port, which is connected to the top of the mixing channel. The powder mixing device also includes a filter 13, an exhaust pipe 14, and an exhaust pump 15. The exhaust port is connected to the filter 13, which is connected to the exhaust pipe 14, which is connected to the exhaust pump 15. The exhaust port is connected to the exhaust pump 15 through the filter 13 and the exhaust pipe 14 in sequence. The filter 13 is used to filter the powder, and the exhaust pump 15 is used to extract the gas in the exhaust pipe 14.

[0115] With this arrangement, when the discharge is not timely and the air pressure in the mixing channel is too high, the exhaust pump 15 can be started to extract the gas in the exhaust pipe 14, so that part of the air flow in the mixing channel is discharged through the filter device 13, the exhaust pipe 14 and the exhaust pump 15 in sequence to reduce the air pressure in the mixing channel.

[0116] Furthermore, since the filter device 13 can filter the powder, discharge of the powder can be avoided.

[0117] As an optional embodiment, Figure 3 and Figure 7 As shown, the bottom of the silo 1 is provided with a first opening, and the top of the air inlet silo 2 is provided with a second opening. The first valve 3 includes a valve core 31 and a second drive mechanism. The top of the valve core 31 is connected to the first opening, and the bottom of the valve core 31 is connected to the second opening, thereby connecting the first opening to the second opening through the valve core 31. A plurality of vent holes 3101 are formed through the valve core 31, allowing the first opening to communicate with the second opening through each of the vent holes 3101.

[0118] The valve core 31 is made of a flexible material, meaning it can deform when squeezed. When the valve core 31 is squeezed and deformed, the opening of each vent hole 3101 also changes. The second drive mechanism is connected to the valve core 31 and is adapted to compress the valve core 31 inward. Specifically, the second drive mechanism can compress the valve core 31, causing it to contract inward, thereby reducing the opening of the vent hole 3101. Correspondingly, by reducing the degree of compression of the valve core 31 by the second drive mechanism, the valve core 31 rebounds, increasing the opening of the vent hole 3101.

[0119] With this arrangement, when two powders need to be mixed, each powder is placed separately into silo 1. Gas is then continuously introduced into air inlet 2. The gas enters silo 1 through the air vents 3101 and continues to flow upward within silo 1, carrying the powders upward with it. The powders are then mixed with the air flow and enter the mixing channel from the bottom, where they flow upward.

[0120] When the flow rate of air entering the silo 1 needs to be reduced, the second drive mechanism is used to compress the valve core 31, causing the valve core 31 to contract inward, thereby reducing the opening of the vent 3101. When the flow rate of air entering the silo 1 needs to be increased, the degree of compression of the valve core 31 by the second drive mechanism is reduced, thereby increasing the opening of the vent 3101.

[0121] The sidewall of silo 1 is a tapered surface 631, and the inner diameter of silo 1 gradually decreases from top to bottom. The sidewall of air inlet silo 2 is also a tapered surface 631, and the inner diameter of air inlet silo 2 gradually decreases from bottom to top. This results in a smaller valve core 31, and thus a smaller vent hole 3101, preventing powder from falling through vent hole 3101.

[0122] It is worth noting that, since the powder has a certain viscosity, even if the opening of the vent hole 3101 is not reduced, the viscosity of the powder can ensure that it cannot fall through the vent hole 3101.

[0123] The second driving mechanism may be a pneumatic clamp.

[0124] In some embodiments, such as Figure 8 As shown, the second driving mechanism includes an upper rotating ring 32, multiple first rotating bodies 33, multiple first connecting members 34, multiple first extrusion strips 35, multiple third motors 36, a lower rotating ring 37, multiple second rotating bodies 38, multiple second connecting members 39, multiple second extrusion strips 310 and multiple fourth motors 311.

[0125] The upper rotating ring 32 is provided with a plurality of first rotating bodies 33, each of which is capable of radially rotating about the upper rotating ring 32. The first rotating bodies 33 are sequentially arranged along the circumference of the upper rotating ring 32. Each third motor 36 is in transmission connection with a corresponding first rotating body 33, so that each third motor 36 can drive a corresponding first rotating body 33 to rotate radially about the upper rotating ring 32.

[0126] Two first connecting members 34 are hingedly connected to each first rotating body 33. A first extruded strip 35 is connected between two adjacent first connecting members 34 on two adjacent first rotating bodies 33. Specifically, for each of the two first connecting members 34 on a first rotating body 33, a first extruded strip 35 is connected between one first connecting member 34 and a first connecting member 34 on a first rotating body 33 adjacent to it; and a first extruded strip 35 is connected between another first connecting member 34 and a first connecting member 34 on another first rotating body 33 adjacent to it.

[0127] Each first extrusion strip 35 is attached to the top of the outer wall of the valve core 31. At this time, each first extrusion strip 35 is arranged in sequence along the circumference of the valve core 31.

[0128] In this arrangement, each third motor 36 is used to correspondingly drive each first rotating body 33 to rotate, so that when each first rotating body 33 drives the two first connecting members 34 hinged thereon to move closer to the axis of the valve core 31, each first extrusion strip 35 moves closer to the axis of the valve core 31 and compresses the top of the valve core 31, causing the top of the valve core 31 to shrink toward its axis, thereby reducing the opening of the top of the vent 3101. Furthermore, when each third motor 36 is used to correspondingly drive each first rotating body 33 to rotate, so that when each first rotating body 33 drives the two first connecting members 34 hinged thereon to move away from the axis of the valve core 31, each first extrusion strip 35 moves away from the axis of the valve core 31 and loosens the top of the valve core 31, thereby increasing the opening of the top of the vent 3101.

[0129] Regarding the lower swivel ring 37 and the upper swivel ring 32, a plurality of second rotating bodies 38 are sleeved on the upper swivel ring 32, enabling each second rotating body 38 to rotate radially around the upper swivel ring 32. The second rotating bodies 38 are sequentially arranged along the circumference of the upper swivel ring 32. Each fourth motor 311 is in transmission connection with a corresponding second rotating body 38, enabling each fourth motor 311 to drive a corresponding second rotating body 38 to rotate radially around the upper swivel ring 32.

[0130] Two second connecting members 39 are hingedly connected to each second rotating body 38. A second extruded strip 310 is connected between two adjacent second connecting members 39 on two adjacent second rotating bodies 38. That is, for each of the two second connecting members 39 on a second rotating body 38, a second extruded strip 310 is connected between one second connecting member 39 and a second connecting member 39 on a second rotating body 38 adjacent to that second rotating body 38; and a second extruded strip 310 is connected between another second connecting member 39 and a second connecting member 39 on another second rotating body 38 adjacent to that second rotating body 38.

[0131] Each second extrusion strip 310 is attached to the top of the outer wall of the valve core 31. At this time, each second extrusion strip 310 is sequentially arranged along the circumference of the valve core 31.

[0132] With this arrangement, each fourth motor 311 is used to correspondingly drive each second rotating body 38 to rotate, so that when each second rotating body 38 drives the two second connecting members 39 hinged thereon to move closer to the axis of the valve core 31, each second extrusion strip 310 moves closer to the axis of the valve core 31 and compresses the bottom of the valve core 31, causing the bottom of the valve core 31 to shrink toward its axis, thereby reducing the opening of the vent 3101. Furthermore, when each fourth motor 311 is used to correspondingly drive each second rotating body 38 to rotate, so that when each second rotating body 38 drives the two second connecting members 39 hinged thereon to move away from the axis of the valve core 31, each second extrusion strip 310 moves away from the axis of the valve core 31 and loosens the bottom of the valve core 31, thereby increasing the opening of the bottom of the vent 3101.

[0133] Furthermore, the opening of the vent hole 3101 can be increased or decreased from bottom to top as needed by the linkage of the third motor 36 and the fourth motor 311. When the opening of the vent hole 3101 decreases from bottom to top, it is easier for the vent hole 3101 to fall when there is a blockage in the vent hole 3101.

[0134] The valve core 31 may be made of rubber.

[0135] Regarding the connection between the third motor 36 and the first rotating body 33, a second gear 331 is connected to the first rotating body 33, and a third gear 361 is connected to the motor shaft of the third motor 36. The second gear 331 is engaged with the third gear 361, so that the third motor 36 can drive the first rotating body 33 to rotate.

[0136] Regarding the connection between the fourth motor 311 and the second rotating body 38, a fourth gear 381 is connected to the second rotating body 38, and a fifth gear 3111 is connected to the motor shaft of the fourth motor 311. The fourth gear 381 is engaged with the fifth gear 3111, so that the fourth motor 311 can drive the second rotating body 38 to rotate.

[0137] An additional support frame should be connected between the air inlet bin 2 and the material bin 1 to compensate for the problem that the valve core 31 made of flexible material cannot provide supporting force.

[0138] As an optional embodiment, Figure 10 As shown, the powder mixing device further includes a base 16 and a vibration device 17. The base 16 is arranged on the placement surface, the vibration device 17 is arranged on the base 16, and the air inlet bin 2 is arranged on the vibration device 17, and the vibration device 17 is used to vibrate the air inlet bin 2.

[0139] This arrangement allows the vibration device 17 to provide micro-vibration to the air inlet bin 2, the silo 1, the cylinder 4, etc., preventing the powder from adhering to the inner wall of the silo 1, the inner wall of the annular cavity, the feed channel 63, and the mixing channel. It also further promotes contact between the powders, thereby enhancing fluidization uniformity.

[0140] Specifically, the vibration device 17 includes a first vibration base 171 , a second vibration base 172 , a second elastic member 173 , a third elastic member 174 , an eccentric member 175 and a fifth motor.

[0141] The first vibration seat 171 is connected to the base 16 via the second elastic member 173, and the second vibration seat 172 is connected to the first vibration seat 171 via the third elastic member 174. The fifth motor is mounted on the second vibration seat 172, and the eccentric member 175 is connected to the electrode shaft of the fifth motor. A cover plate is provided on the second vibration seat 172, and the air intake bin 2 is fixedly connected to the cover plate. Thus, when the fifth motor drives the eccentric member 175 to rotate, the eccentric member 175 generates forces in different directions on the fifth motor, causing the fifth motor to generate micro-vibrations in different directions, thereby causing the second vibration seat 172 to generate micro-vibrations, and further causing the feed bin 1 to generate micro-vibrations.

[0142] The arrangement of the second elastic member 173 and the third elastic member 174 enables both the first vibration seat 171 and the second vibration seat 172 to generate displacement to achieve vibration.

[0143] The second elastic member 173 and the third elastic member 174 may be springs.

[0144] The base 16 is U-shaped, and the first vibration seat 171 is arranged in the U-shaped base 16. The two sides of the first vibration seat 171 are respectively connected to the inner wall of the base 16 through the second elastic member 173, so that the first vibration seat 171 can generate lateral displacement while supporting the first vibration seat 171.

[0145] The first vibration seat 171 is provided with a mounting groove, and the second vibration seat 172 is provided in the mounting groove. The top surface and the bottom surface of the second vibration seat 172 are respectively connected to the inner wall of the mounting groove through the third elastic member 174, so that the second vibration seat 172 can generate an up and down displacement while supporting the second vibration seat 172.

[0146] In this way, the vibration of the second vibration seat 172 can be achieved by cooperating with the fifth motor to drive the eccentric member 175 to rotate.

[0147] Although the embodiments of the present application are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations shall fall within the scope defined by the present application.

Claims

1. A powder mixing device, characterized in that: include: A silo (1) suitable for containing powder; An air inlet bin (2) connected to the bottom of the silo (1) and suitable for introducing gas; a first valve (3), the bottom of the silo (1) being in communication with the air inlet silo (2) via the first valve (3); A cylinder (4), the bottom of which is connected to the top of the silo (1), and a discharge port (41) is provided on the cylinder (4); A first core (5) is arranged in the cylinder (4), a flow hole is provided on the first core (5) along the extension direction of the cylinder (4), and a plurality of first protrusions (51) are provided on the inner wall of the flow hole. Each of the first protrusions (51) is arranged in sequence along the extension direction of the cylinder (4), and each of the first protrusions (51) is arranged to be inclined downward to form a first groove (52) between the first core (5) and the inner wall of the flow hole; The second core (6) is arranged in the flow hole, and a mixing flow channel is formed between the outer wall of the second core (6) and the inner wall of the flow hole, and the discharge port (41) is connected to the top of the mixing flow channel; a plurality of second protrusions (61) are arranged on the outer wall of the first core (5), and each second protrusion (61) is arranged in sequence along the extension direction of the cylinder (4), and each second protrusion (61) is arranged to be tilted downward to form a second groove (62) between the outer wall of the second core (6).

2. The powder mixing device according to claim 1, characterized in that: Also includes: A cover body (7), the cover body (7) comprising an outer cover body (71) and an inner cover body (72) connected to each other, the outer cover body (71) being sleeved around the periphery of the inner cover body (72), an annular cavity being formed between the inner wall of the outer cover body (71) and the outer wall of the inner cover body (72), the outer cover body (71) being connected to the top of the cylinder (4), and a first feed port (713) being connected to the outer cover body (71); The second valve (8) is connected to the outer cover (71) and divides the annular cavity into a feed cavity (7111) and a discharge cavity (7112); the first feed port (713) is connected to the feed cavity (7111), and the discharge cavity (7112) is connected to the top of the mixing channel.

3. The powder mixing device according to claim 2, characterized in that: The second valve (8) comprises: a plurality of baffles (82), each of the baffles (82) being disposed in the annular cavity and being rotatably connected to the outer cover (71) so as to be rotatable between a first position and a second position, and each of the baffles (82) being evenly disposed along the circumference of the annular cavity; A first driving mechanism (81), each of the baffles (82) is connected to the driving mechanism respectively, and the first driving mechanism (81) is used to drive each of the baffles (82) to rotate, wherein: When each of the baffles (82) is rotated to the first position, each two adjacent baffles (82) abut against each other, so that each of the baffles (82) cuts off the feed cavity (7111) and the discharge cavity (7112); When each of the baffles (82) is rotated to the second position, a material passing gap is formed between each two adjacent baffles (82).

4. The powder mixing device according to claim 2, characterized in that: A feed channel (63) is provided on the second core (6) along the extension direction of the cylinder (4), and a second feed port (723) is connected to the inner cover (72), and the second feed port (723) is communicated with the top of the feed channel (63). The powder mixing device further comprises: A one-way valve (9), wherein the bottom of the feed channel (63) is connected to the silo (1) through the one-way valve (9), so that the feed channel (63) is unidirectionally connected to the silo (1).

5. The powder mixing device according to claim 4, characterized in that: Also includes: A heat exchange cavity (10) is connected to the inner cover (72), a heat exchange channel is provided in the heat exchange cavity (10), a liquid inlet pipe (102) and a liquid outlet pipe (103) are provided on the heat exchange cavity (10), the liquid inlet pipe (102) and the liquid outlet pipe (103) are respectively connected to the heat exchange channel, a channel (101) is provided on the heat exchange cavity (10), and the second feed port (723) is connected to the top of the feed channel (63) through the channel (101).

6. The powder mixing device according to claim 1, characterized in that: The air inlet bin (2) is provided with a plurality of air inlets (21), and the air inlets (21) are sequentially arranged along the circumference of the air inlet bin (2). The powder mixing device further comprises: An air intake pipeline (11) is arranged around the periphery of the air intake bin (2), each of the air intake ports (21) is respectively connected to the air intake pipeline (11), and the air intake pipeline (11) is suitable for introducing gas.

7. The powder mixing device according to claim 1, characterized in that: The discharge openings (41) are provided in plurality, and the discharge openings (41) are sequentially provided along the circumference of the cylinder (4). The powder mixing device further comprises: A discharge pipeline (12) is arranged around the outer periphery of the cylinder (4), and each of the discharge ports (41) is respectively connected to the discharge pipeline (12).

8. The powder mixing device according to claim 1, characterized in that: The cylinder (4) is provided with an exhaust port, which is communicated with the top of the mixing channel. The powder mixing device further comprises a filtering device (13), an exhaust pipe (14) and an exhaust pump (15). The exhaust port is communicated with the exhaust pump (15) through the filtering device (13) and the exhaust pipe (14) in sequence. The filtering device (13) is used to filter powder, and the exhaust pump (15) is used to extract gas from the exhaust pipe (14).

9. The powder mixing device according to claim 1, characterized in that: The bottom of the silo (1) is provided with a first opening, the top of the air inlet silo (2) is provided with a second opening, and the first valve (3) comprises: A valve core (31), the top of which is connected to the first opening, and the bottom of which is connected to the second opening. The valve core (31) is made of a flexible material and is provided with a plurality of vent holes (3101). The first opening can be connected to the second opening through the vent holes (3101). The second driving mechanism is connected to the valve core (31) and is adapted to compress the valve core (31) inwardly to reduce the opening of the vent hole (3101).

10. The powder mixing device according to claim 1, characterized in that: Also includes: Base (16); A vibration device (17) is arranged on the base (16), and the air intake bin (2) is arranged on the vibration device (17). The vibration device (17) is used to generate vibration for the air intake bin (2).

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