Magnesium powder conveying device

Abstract

The invention relates to the technical field of magnesium powder transportation, in particular to a magnesium powder conveying device which comprises a material distributing tank and a conveying pipe, the conveying pipe is a turbulent flow double-sleeve pipe and comprises an outer sleeve pipe and an inner sleeve pipe connected to the top of the inner wall of the outer sleeve pipe, and openings evenly distributed in the conveying direction at intervals are formed in the bottom of the inner sleeve pipe; a ring set is fixedly connected into the inner sleeve and comprises a drainage ring and a stop ring, a mounting ring is elastically connected to the side, away from the conveying direction, of the stop ring, an iris mechanism is arranged in the mounting ring, and a flow guide plate is rotationally connected to the side, away from the conveying direction, of the mounting ring. A driving assembly I for driving the iris mechanism to change the size of the through hole and a driving assembly II for driving the flow guide plate to rotate are arranged on the inner sleeve. According to the magnesium powder conveying device, magnesium powder is not prone to being accumulated and agglomerated in the conveying pipe, and when the accumulation and blocking phenomena occur, the magnesium powder can be rapidly dispersed, the conveying pipe can be dredged, and normal conveying of powder is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of magnesium powder transportation, and in particular to a magnesium powder conveying device. Background Art

[0002] Pneumatic conveying is a material handling technology that uses airflow as a driving force to transport granular or powdered materials from one place to another through a pipeline. Pneumatic conveying mainly relies on the airflow generated by air or other gases (such as nitrogen) in the pipeline to push the material. When a single-tube conveying device is used to convey powdered materials, the powder is easy to adhere to the inner wall of the conveying pipeline and form agglomerates. In the subsequent conveying process of the powder, the powder is easy to come into contact with the agglomerates, causing the volume of the agglomerates to gradually increase, affecting the conveying efficiency of the conveying pipeline, and even causing the conveying pipeline to be blocked.

[0003] A Chinese patent with announcement number CN116513723B discloses a long-distance coal powder conveying device, including a support plate, and a lifting component, a conveying component and a discharging component are sequentially arranged on the upper end of the support plate along its length direction. The lifting component includes a feeding barrel installed on the upper end of the support plate, and a spiral blade is rotatably connected to the inside of the feeding barrel through a support shaft, and a spiral groove that slides with the spiral blade is opened on the inner wall of the feeding barrel. A driving motor connected to the spiral blade is installed at either end of the feeding barrel through a motor seat, a feed barrel is installed on the upper side of the feeding barrel away from the conveying pipeline in a connected manner, and a lower feeding barrel is arranged on the lower side of the feeding barrel close to the conveying pipeline in a connected manner, a supporting rod is installed on the inner side wall of the lower feeding barrel, and a shifting rod is installed on the upper end of the supporting rod, and the shifting rod is in sliding contact with the side wall of the spiral blade.

[0004] The above technical solution conveys coal powder by means of a spiral blade that slides with the inner wall of the feeding barrel, so that there is no gap between the spiral blade and the inner wall of the feeding barrel, thereby ensuring that the coal powder in the feeding barrel is completely conveyed to the lower barrel, avoiding coal powder remaining on the inner wall of the feeding barrel; the coal powder on the surface of the spiral blade is scraped off by a lever, thereby avoiding coal powder remaining on the surface of the spiral blade and causing waste.

[0005] However, in actual implementation, the lever cannot clean the powder on the entire spiral blade, causing the powder to adhere to and accumulate on the spiral blade more easily. In addition, the lever cannot clean the support shaft, causing the powder to adhere to and accumulate on the support shaft, which not only affects the conveying efficiency, but also makes it relatively difficult to clean the inside of the auger conveying mechanism, increasing the complexity and cost of maintenance. In addition, since flammable powders such as magnesium powder are sensitive to temperature, high temperatures will accelerate their oxidation process, increasing the risk of spontaneous combustion. The drive motor in the above technical solution will generate heat during operation, and its temperature needs to be additionally controlled to avoid safety hazards.

[0006] Therefore, the art needs a magnesium powder conveying device to solve the above problems. Summary of the invention

[0007] The present invention provides a magnesium powder conveying device, aiming to solve the problem that when a single-tube conveying device or an auger conveying mechanism is used to convey magnesium powder in the related art, the magnesium powder adheres to the inner wall of the conveying pipe or the auger and is difficult to clean, which affects the conveying efficiency and increases the complexity and cost of equipment maintenance.

[0008] A magnesium powder conveying device of the present invention comprises a material distribution tank and a conveying pipe connected to the material distribution tank, wherein the conveying pipe is a turbulent double-tube, the turbulent double-tube comprises an outer sleeve and an inner sleeve connected to the top of the inner wall of the outer sleeve, and the bottom of the inner sleeve is provided with openings evenly spaced along the conveying direction; A ring group is fixedly connected inside the inner sleeve, and the ring group includes a drainage ring and a stop ring. The drainage ring is located above the middle position of the opening, and the stop ring is located on the side of the drainage ring facing the conveying direction, and the outer periphery of the stop ring is completely in contact with the inner wall of the inner sleeve; The side of the stop ring facing away from the conveying direction is elastically connected to a mounting ring, an iris mechanism is arranged inside the mounting ring, and the side of the mounting ring facing away from the conveying direction is rotatably connected to a guide plate, the iris mechanism forms a through hole in the center of the mounting ring, and the inner sleeve is provided with a driving component 1 for driving the iris mechanism to change the size of its through hole and a driving component 2 for driving the guide plate to rotate.

[0009] Beneficial effect: The present invention provides a mounting ring and a guide plate. When magnesium powder in the outer sleeve is accumulated or blocked, the through hole in the center of the iris mechanism is reduced by driving component 1 to increase the resistance to the airflow, thereby guiding more airflow into the outer sleeve through the guide plate, thereby increasing the impact force of the airflow. The guide plate is driven to swing by driving component 2, so that the airflow entering between the guide ring and the mounting ring is guided by the guide plate to form a turbulent flow blowing toward the magnesium powder accumulation, which helps to loosen the accumulated magnesium powder and unclog the conveying pipe.

[0010] Preferably, the iris mechanism includes a turntable and a plurality of blades, a mounting ring having a mounting groove along its inner circumference, the turntable is rotatably connected in the mounting groove, the blades are arranged between the turntable and the groove wall of the mounting groove, a through hole is formed in the center of the mounting ring, a push groove is provided on the turntable, a limit groove is provided on the mounting ring, and convex columns corresponding to the push groove and the limit groove extend on both sides of the blades respectively. When the air pressure pushes the mounting ring to move in the conveying direction, the driving assembly drives the turntable to rotate, and the turntable drives the blades to move to shrink the through hole.

[0011] Preferably, the mounting ring is slidably matched with the inner sleeve along the conveying direction through a limit assembly, and the driving assembly includes a driving rod and a driving groove. The driving rod is fixedly connected to the turntable, and the driving groove is provided on the inner wall of the inner sleeve. A movable groove is provided on the outer periphery of the mounting ring, and the driving rod passes through the movable groove and extends into the driving groove. When the air pressure pushes the mounting ring to move in the conveying direction, the driving rod moves along the driving groove, driving the turntable to rotate to reduce the through hole.

[0012] Beneficial effect: When the airflow pushes the installation ring to move in the conveying direction, the driving groove and the driving rod cooperate to drive the blades, thereby achieving the effect of changing the size of the through hole. The structure is compact and ingenious, no electrical drive is required, and energy consumption is reduced.

[0013] Preferably, an elastic member is connected between the guide plate and the mounting ring. When the guide plate is not subjected to external force, the guide plate is in a state of being tilted from top to bottom toward a side away from the mounting ring. The second driving component includes elastic blocks arranged on the wall of the inner sleeve at intervals along the conveying direction. The elastic blocks are elastically connected to the inner sleeve along the radial direction of the inner sleeve. When the mounting ring moves along the conveying direction, the elastic blocks drive the guide plate to rotate.

[0014] Beneficial effect: The guide plate is rotated by the spring block to adjust the angle of the guide plate, so that the guide plate changes the direction of the airflow, which is conducive to generating turbulence and accelerating the dispersion of magnesium powder agglomeration.

[0015] Preferably, a wedge surface is provided on the side of the spring block facing the conveying direction and the side away from the conveying direction respectively, a slide groove is provided on the inner wall of the inner sleeve, the spring block is elastically connected to the slide groove, and when the spring block is not subjected to external force, part of the structure of the wedge surface is located outside the slide groove.

[0016] Preferably, the inner wall of the inner sleeve is provided with a slide groove II along the radial direction of the inner sleeve, and a protrusion is elastically connected to the slide groove II. When the mounting ring moves along the conveying direction to pass over the protrusion, the protrusion pops out to prevent the mounting ring from moving toward the side away from the conveying direction. The protrusion is respectively provided with an inclined wedge surface II on the side facing the conveying direction and the side away from the conveying direction. When the protrusion is not subjected to external force, part of the structure of the inclined wedge surface II is located outside the slide groove II.

[0017] Beneficial effect: By setting the protrusion, after the conveying pipe is unblocked and the air pressure is stabilized, the mounting ring pushes the protrusion to reset it, so that the guide plate can hit the bullet under the drive of the mounting ring, which will cause vibration to the turbulent double sleeve, which is conducive to the separation of magnesium powder from the pipe wall and avoids the accumulation of more magnesium powder at the place where magnesium powder is attached, causing agglomeration.

[0018] Preferably, the mounting ring is rotatably connected to a rotating shaft, the guide plate is rotatably connected to the rotating shaft, the rotating shaft is fixedly connected to a push plate, the push plate is located on the side of the guide plate facing the conveying direction, and a driving component three is provided between the inner sleeve and the rotating shaft for driving the rotating shaft to drive the push plate to rotate. When the mounting ring moves along the conveying direction, the driving component three drives the rotating shaft to drive the push plate to push the guide plate to rotate toward the side away from the conveying direction.

[0019] Beneficial effect: The push plate of the driving component three is driven to push the guide plate to rotate, thereby avoiding the problem that the airflow has too much impact on the guide plate when the conveying pipe is blocked, and the guide plate cannot be rotated to adjust the angle only by the push of the spring block.

[0020] Preferably, drive component three includes a connecting rod, a guide block, guide groove one and guide groove two, one end of the connecting rod is fixedly connected to the rotating shaft, and the other end is rotatably connected to the guide block, guide groove one and guide groove two are arranged on the inner wall of the inner sleeve, and guide groove one is arranged obliquely from bottom to top along the conveying direction, the guide block is slidably matched with guide groove one, and when the mounting ring moves along the conveying direction, the guide block moves along guide groove one and drives the rotating shaft to rotate through the connecting rod, and the rotating shaft drives the push plate to push the guide plate to rotate.

[0021] The beneficial effects of the present invention are: (1) The present invention provides a mounting ring and a guide plate. When magnesium powder in the outer sleeve is accumulated or blocked, the through hole in the center of the iris mechanism is reduced by driving component 1 to increase the resistance to the airflow, thereby directing more airflow into the outer sleeve through the guide plate, increasing the impact force of the airflow, and helping to blow away the agglomerated or attached magnesium powder; (2) The guide plate is driven to swing by the driving component 2, so that the airflow entering between the guide ring and the mounting ring is guided by the guide plate, forming a turbulent flow blowing toward the magnesium powder accumulation area, which helps to loosen the accumulated magnesium powder, thereby realizing the rapid dredging of the conveying pipe; (3) The magnesium powder conveying device of the present invention is not only not easy to cause magnesium powder to accumulate and clump in the conveying pipe, but also can quickly disperse the magnesium powder and dredge the conveying pipe when accumulation and blockage occur, thereby ensuring the normal transportation of the powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The figure is a schematic diagram of the overall structure of a magnesium powder conveying device of the present invention.

[0023] Figure 2 The present invention is a schematic structural diagram of a turbulent double-tube magnesium powder conveying device.

[0024] Figure 3 It is a cross-sectional view of a turbulent double-tube magnesium powder conveying device of the present invention.

[0025] Figure 4 The invention discloses a schematic assembly diagram of a turbulent double sleeve and a mounting ring of a magnesium powder conveying device.

[0026] Figure 5 It is a structural schematic diagram of a mounting ring of a magnesium powder conveying device of the present invention.

[0027] Figure 6 The structure diagram of the iris mechanism of a magnesium powder conveying device of the present invention is shown in FIG. Figure 1 .

[0028] Figure 7 The structure diagram of the iris mechanism of a magnesium powder conveying device of the present invention is shown in FIG. Figure 2 .

[0029] Figure 8 yes Figure 3 A partial enlarged view of part A.

[0030] Fig. 9 The present invention is a schematic structural diagram of a guide plate of a magnesium powder conveying device.

[0031] Fig.10 The present invention is a schematic structural diagram of a guide groove 1 and a guide groove 2 of a magnesium powder conveying device.

[0032] Fig.11 The present invention is a schematic diagram of the cooperation between a guide block and a guide groove of a magnesium powder conveying device.

[0033] Reference numerals: 1. material distribution tank; 2. outer sleeve; 3. inner sleeve; 31. opening; 32. guide groove; 33. driving groove; 34. spring block; 35. inclined wedge surface one; 36. convex block; 37. inclined wedge surface two; 38. guide groove one; 39. guide groove two; 4. drainage ring; 5. stop ring; 6. mounting ring; 60. slider; 61. turntable; 62. blade; 621. boss; 63. through hole; 64. push groove; 65. limit groove; 66. driving rod; 67. movable groove; 7. guide plate; 8. rotating shaft; 81. push plate; 82. connecting rod; 83. guide block. DETAILED DESCRIPTION

[0034] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0035] like Figures 1 to 11 As shown, a magnesium powder conveying device of the present invention comprises a material distribution tank 1 and a conveying pipe connected to the material distribution tank 1, wherein the conveying pipe is a turbulent double sleeve, and the turbulent double sleeve comprises an outer sleeve 2 and an inner sleeve 3 connected to the top of the inner wall of the outer sleeve 2, and the magnesium powder is conveyed in the outer sleeve 2. The bottom of the inner sleeve 3 is provided with openings 31 evenly spaced along the conveying direction. A ring group is fixedly connected inside the inner sleeve 3, and the ring group comprises a drainage ring 4 and a stop ring 5, wherein the drainage ring 4 is located above the middle position of the opening 31, and the stop ring 5 is located on the side of the drainage ring 4 facing the conveying direction, and the outer periphery of the stop ring 5 is completely in contact with the inner wall of the inner sleeve 3.

[0036] like Figure 4 and Figure 5As shown, the side of the stop ring 5 away from the conveying direction is elastically connected to the mounting ring 6 through a spring. An iris mechanism is arranged inside the mounting ring 6, and the iris mechanism forms a through hole 63 at the center of the mounting ring 6. The side of the mounting ring 6 away from the conveying direction is rotatably connected to the guide plate 7, and the inner sleeve 3 is provided with a driving component 1 for driving the iris mechanism to change the size of the through hole 63 and a driving component 2 for driving the guide plate 7 to rotate.

[0037] When magnesium powder is normally conveyed, nitrogen is introduced into the turbulent double sleeves. The nitrogen flow drives the magnesium powder to move in the outer sleeve 2. When the auxiliary air flow in the inner sleeve 3 passes through the opening 31 and the drainage ring 4, strong turbulence is generated in the outer sleeve 2. This turbulence can reduce the formation of lumps or bridges of materials during the conveying process, ensuring the continuous flow of materials. However, when the conveying device is started and stopped, the sudden generation and disappearance of turbulence may cause magnesium powder to accumulate or be blocked in the outer sleeve 2, affecting normal transportation. When magnesium powder accumulates or is blocked, the air pressure at the accumulation site will increase, and the airflow at the accumulation site will enter the drainage ring 4 from the opening 31, causing the air pressure between the drainage ring 4 and the stop ring 5 to increase. The airflow pushes the mounting ring 6 to move in the conveying direction. At the same time, the iris mechanism is driven by the driving component 1 to shrink the through hole 63 in the middle of the mounting ring 6, and the guide plate 7 is driven by the driving component 2 to swing, so that part of the airflow entering between the drainage ring 4 and the mounting ring 6 is guided by the guide plate 7 to form a turbulent flow blowing toward the magnesium powder accumulation site, which helps to loosen the accumulated magnesium powder and unclog the conveying pipe.

[0038] like Figures 5 to 7 As shown, the iris mechanism includes a rotating disk 61 and six blades 62. The mounting ring 6 is provided with a mounting groove along its inner circumference. The rotating disk 61 is rotatably connected in the mounting groove. The blades 62 are arranged between the rotating disk 61 and the groove wall of the mounting groove. A plurality of blades 62 form a through hole 63 at the center of the mounting ring 6. The rotating disk 61 is provided with a pushing groove 64, and the mounting ring 6 is provided with a limiting groove 65. Both sides of the blades 62 extend protruding columns 621 corresponding to the pushing groove 64 and the limiting groove 65. When the air pressure pushes the mounting ring 6 to move in the conveying direction, the driving component drives the rotating disk 61 to rotate, and the rotating disk 61 drives the blades 62 to move to reduce the through hole 63.

[0039] like Figures 4 to 7 As shown, the mounting ring 6 is slidably matched with the inner sleeve 3 along the conveying direction through a limiting assembly. The limiting assembly includes a slider 60 and a guide groove 32. The guide groove 32 is opened on the inner wall of the inner sleeve 3 along the conveying direction. The slider 60 is fixedly connected to the outer periphery of the mounting ring 6, and the slider 60 is slidably connected in the guide groove 32 along the conveying direction.

[0040] The driving assembly 1 includes a driving rod 66 and a driving groove 33. The driving rod 66 is fixedly connected to the rotating disk 61. The driving groove 33 is formed on the inner wall of the inner sleeve 3. A movable groove 67 is formed on the outer periphery of the mounting ring 6. The driving rod 66 penetrates the movable groove 67 and extends into the driving groove 33. When the airflow pushes the mounting ring 6 to move in the conveying direction, the driving rod 66 moves along the driving groove 33, driving the rotating disk 61 to rotate, so as to reduce the through hole 63.

[0041] like Figure 4 and Figure 8 As shown, an elastic member is connected between the guide plate 7 and the mounting ring 6. As an example, the elastic member is a spring. When the guide plate 7 is not acted upon by an external force, it is in a state of being tilted from top to bottom toward the side away from the mounting ring 6. The second driving component includes a spring block 34 arranged on the wall of the inner sleeve 3 at intervals along the conveying direction. A slide groove 1 is provided on the inner wall of the inner sleeve 3. The spring block 34 is elastically connected to the slide groove 1 along the radial direction of the inner sleeve 3. The side of the spring block 34 facing the conveying direction and the side away from the conveying direction are respectively provided with an inclined wedge surface 1 35. When the spring block 34 is not acted upon by an external force, a part of the structure of the inclined wedge surface 1 35 is located outside the slide groove 1.

[0042] When the mounting ring 6 moves along the conveying direction, the spring block 34 blocks the guide plate 7 from following the movement of the mounting ring 6, thereby driving the guide plate 7 to rotate to the side away from the conveying direction, thereby changing the direction of the airflow. As the mounting ring 6 moves, the guide plate 7 squeezes the spring block 34 into the slide groove 1 under the pull of the spring between it and the mounting ring 6. The guide plate 7 loses the push of the spring block 34 and rotates toward the mounting ring 6. When the guide plate 7 contacts the next spring block 34, it is pushed and rotated again, thereby changing the direction of the airflow with the guide plate 7 and forming a turbulent flow that impacts the magnesium powder accumulation.

[0043] The inner wall of the inner sleeve 3 is provided with a second slide groove along the radial direction of the inner sleeve 3, and a protrusion 36 is elastically connected in the second slide groove through a spring. The side of the protrusion 36 facing the conveying direction and the side away from the conveying direction are respectively provided with a second inclined wedge surface 37. When the protrusion 36 is not subjected to external force, part of the structure of the second inclined wedge surface 37 is located outside the second slide groove. When the mounting ring 6 moves along the conveying direction to pass over the protrusion 36, the protrusion 36 pops out to prevent the mounting ring 6 from moving to the side away from the conveying direction. After the accumulated magnesium powder is loosened and carried away by the airflow, the air pressure in the inner sleeve 3 and the outer sleeve 2 is restored to be stable, and the spring between the mounting ring 6 and the stop ring 5 pushes the mounting ring 6 to move to the side away from the conveying direction. The mounting ring 6 squeezes the second inclined wedge surface 37 to make the protrusion 36 enter the second slide groove.

[0044] When the mounting ring 6 moves to the side away from the conveying direction, the spring block 34 blocks the guide plate 7 from following the mounting ring 6 and squeezes the guide plate 7 to rotate to the side of the conveying direction. After the guide plate 7 squeezes the inclined wedge surface 35 to make the spring block 34 enter the slide groove, the spring between the guide plate 7 and the mounting ring 6 drives the guide plate 7 to rotate to the side away from the conveying direction. When the guide plate 7 contacts the next spring block 34, the above-mentioned activity process is repeated, so as to achieve fine adjustment of the rotation direction of the guide plate 7 when the mounting ring 6 is reset, which is beneficial to blowing away a small amount of magnesium powder attached to the wall of the outer sleeve 2, and when the spring pushes the mounting ring 6 to move to the side away from the conveying direction, the guide plate 7 hits the spring block 34, which will cause vibration to the turbulent double sleeve, which is beneficial to the separation of magnesium powder from the tube wall and avoids the accumulation of more magnesium powder at the magnesium powder attachment point to cause agglomeration.

[0045] like Figures 9 to 11 As shown, in order to avoid too great an impact of the airflow on the guide plate 7 during blockage, the guide plate 7 cannot be rotated to adjust the angle only by the push of the spring block 34. In this embodiment, the mounting ring 6 is rotatably connected to the rotating shaft 8, and the guide plate 7 is rotatably connected to the rotating shaft 8. The rotating shaft 8 is fixedly connected to a push plate 81, and the push plate 81 is located on the side of the guide plate 7 facing the conveying direction. A driving component three is provided between the inner sleeve 3 and the rotating shaft 8 for driving the rotating shaft 8 to drive the push plate 81 to rotate. When the mounting ring 6 moves along the conveying direction, the driving component three drives the rotating shaft 8 to drive the push plate 81 to push the guide plate 7 to rotate toward the side away from the conveying direction.

[0046] The driving component three includes a connecting rod 82, a guide block 83, a guide groove 1 38 and a guide groove 2 39. One end of the connecting rod 82 is fixedly connected to the rotating shaft 8, and the other end is rotatably connected to the guide block 83. The guide groove 1 38 and the guide groove 2 39 are arranged on the inner wall of the inner sleeve 3, and the guide groove 1 38 is arranged obliquely from bottom to top along the conveying direction. The guide block 83 is slidably matched with the guide groove 1 38. When the mounting ring 6 moves along the conveying direction, the guide block 83 moves along the guide groove 1 38 and drives the rotating shaft 8 to rotate through the connecting rod 82. The rotating shaft 8 drives the push plate 81 to push the guide plate 7 to rotate.

[0047] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0049] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A magnesium powder conveying device, comprising a material distribution tank (1) and a conveying pipe connected to the material distribution tank (1), characterized in that: The conveying pipe is a turbulent double-tube, comprising an outer sleeve (2) and an inner sleeve (3) connected to the top of the inner wall of the outer sleeve (2), and the bottom of the inner sleeve (3) is provided with openings (31) evenly spaced along the conveying direction; A ring group is fixedly connected inside the inner sleeve (3), the ring group comprising a drainage ring (4) and a stop ring (5), the drainage ring (4) is located above the middle position of the opening (31), the stop ring (5) is located on the side of the drainage ring (4) facing the conveying direction, and the outer periphery of the stop ring (5) is completely in contact with the inner wall of the inner sleeve (3); The side of the stop ring (5) facing away from the conveying direction is elastically connected to a mounting ring (6), an iris mechanism is arranged inside the mounting ring (6), and the side of the mounting ring (6) facing away from the conveying direction is rotatably connected to a guide plate (7), the iris mechanism forms a through hole (63) at the center of the mounting ring (6), and the inner sleeve (3) is provided with a driving component 1 for driving the iris mechanism to change the size of the through hole (63) thereof, and a driving component 2 for driving the guide plate (7) to rotate.

2. The magnesium powder conveying device according to claim 1, characterized in that: The iris mechanism comprises a rotating disk (61) and a plurality of blades (62). A mounting groove is provided along the inner circumference of the mounting ring (6). The rotating disk (61) is rotatably connected to the mounting groove. The blades (62) are arranged between the rotating disk (61) and the groove wall of the mounting groove. The plurality of blades (62) form a through hole (63) at the center of the mounting ring (6). A pushing groove (64) is provided on the rotating disk (61). A limiting groove (65) is provided on the mounting ring (6). Convex columns (621) corresponding to the pushing groove (64) and the limiting groove (65) are respectively extended on both sides of the blades (62). When the air pressure pushes the mounting ring (6) to move in the conveying direction, the driving component drives the rotating disk (61) to rotate, and the rotating disk (61) drives the blades (62) to move to reduce the through hole (63).

3. The magnesium powder conveying device according to claim 2, characterized in that: The mounting ring (6) is slidably matched with the inner sleeve (3) along the conveying direction through a limit assembly. The driving assembly 1 comprises a driving rod (66) and a driving groove (33). The driving rod (66) is fixedly connected to the turntable (61). The driving groove (33) is formed on the inner wall of the inner sleeve (3). A movable groove (67) is formed on the outer periphery of the mounting ring (6). The driving rod (66) penetrates the movable groove (67) and extends into the driving groove (33). When the air pressure pushes the mounting ring (6) to move in the conveying direction, the driving rod (66) moves along the driving groove (33), driving the turntable (61) to rotate, thereby reducing the through hole (63).

4. The magnesium powder conveying device according to claim 1, characterized in that: An elastic member is connected between the guide plate (7) and the mounting ring (6); when the guide plate (7) is not acted upon by an external force, the guide plate (7) is in a state of being tilted from top to bottom toward a side away from the mounting ring (6); the second driving component comprises elastic blocks (34) arranged on the wall of the inner sleeve (3) at intervals along the conveying direction; the elastic blocks (34) are elastically connected to the inner sleeve (3) along the radial direction of the inner sleeve (3); when the mounting ring (6) moves along the conveying direction, the elastic blocks (34) drive the guide plate (7) to rotate.

5. The magnesium powder conveying device according to claim 4, characterized in that: The spring block (34) is provided with an inclined wedge surface (35) on one side facing the conveying direction and on the other side facing away from the conveying direction, respectively. A slide groove (3) is provided on the inner wall of the inner sleeve (3). The spring block (34) is elastically connected to the slide groove (3). When the spring block (34) is not subjected to external force, part of the structure of the inclined wedge surface (35) is located outside the slide groove (3).

6. The magnesium powder conveying device according to claim 5, characterized in that: The inner wall of the inner sleeve (3) is provided with a second slide groove along the radial direction of the inner sleeve (3), and a protrusion (36) is elastically connected in the second slide groove. When the mounting ring (6) moves along the conveying direction to pass over the protrusion (36), the protrusion (36) pops out to prevent the mounting ring (6) from moving toward the side away from the conveying direction. The protrusion (36) is provided with a second inclined wedge surface (37) on the side facing the conveying direction and the side away from the conveying direction, respectively. When the protrusion (36) is not subjected to external force, part of the structure of the second inclined wedge surface (37) is located outside the second slide groove.

7. The magnesium powder conveying device according to claim 6, characterized in that: The mounting ring (6) is rotatably connected to a rotating shaft (8), the guide plate (7) is rotatably connected to the rotating shaft (8), the rotating shaft (8) is fixedly connected to a push plate (81), the push plate (81) is located on a side of the guide plate (7) facing the conveying direction, and a driving component three is provided between the inner sleeve (3) and the rotating shaft (8) for driving the rotating shaft (8) to drive the push plate (81) to rotate. When the mounting ring (6) moves along the conveying direction, the driving component three drives the rotating shaft (8) to drive the push plate (81) to push the guide plate (7) to rotate toward a side away from the conveying direction.

8. The magnesium powder conveying device according to claim 7, characterized in that: The driving assembly three comprises a connecting rod (82), a guide block (83), a guide groove 1 (38) and a guide groove 2 (39). One end of the connecting rod (82) is fixedly connected to the rotating shaft (8), and the other end is rotatably connected to the guide block (83). The guide groove 1 (38) and the guide groove 2 (39) are arranged on the inner wall of the inner sleeve (3), and the guide groove 1 (38) is arranged obliquely from bottom to top along the conveying direction. The guide block (83) and the guide groove 1 (38) are slidably matched. When the mounting ring (6) moves along the conveying direction, the guide block (83) moves along the guide groove 1 (38) and drives the rotating shaft (8) to rotate through the connecting rod (82). The rotating shaft (8) drives the push plate (81) to push the guide plate (7) to rotate.

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