Pneumatic conveying equipment for conveying magnetic powder

Abstract

The invention relates to the technical field of pneumatic conveying, and particularly discloses pneumatic conveying equipment for conveying magnetic powder. The device comprises a fan, a feeding device, a conveying pipeline, a dust removal device and a separation and collection device which are sequentially arranged in the gas flowing direction, the conveying pipeline comprises a straight pipe and a bent pipe, the bent pipe comprises a bent transition section, one end of the bent transition section is provided with a first connector, and the other end of the bent transition section is provided with a second connector; the bending transition section is of an asymmetric bending structure, and a groove space is formed. An arc-shaped swing piece is arranged in the groove space, and the bottom of the arc-shaped swing piece is connected with a first spring; a high-pressure air source is further arranged on one side of the bent pipe. By arranging the bent transition section, arranging the arc-shaped swing piece on the bent transition section and arranging the vibration buffer assembly, the occurrence of magnetic powder agglomeration can be reduced, and the abrasion of the magnetic powder to the inner wall of the pipeline is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of pneumatic conveying, in particular to a pneumatic conveying device for conveying magnetic powder. Background Art

[0002] Ferrite magnetic powder (such as ferroferric oxide, ferrous oxide, etc.) is used in the new energy vehicle industry. Since the magnetic powder itself is magnetic, the particles are easily adsorbed by magnetic force or static magnetic force to form clusters, and magnetic chain accumulation effect is likely to occur in the conveying pipeline, causing pipeline blockage and affecting the conveying efficiency. In addition, the hardness of magnetic powder is generally high. When it is carried by high-speed airflow and directly hits the inner wall of the pipeline or the corner of the bend, it will cause obvious abrasive wear to the conveying pipeline. Under long-term operation, it is easy to cause scratches, pits and even cracks on the lining and wall of the pipe, shortening the service life of the equipment and increasing maintenance costs.

[0003] Therefore, it is necessary to provide a new technical solution to overcome the above-mentioned defects. Summary of the Invention

[0004] The object of the present invention is to provide a pneumatic conveying device for conveying magnetic powder that can effectively solve the above technical problems.

[0005] In order to achieve the purpose of the present invention, the following technical solutions are adopted: A pneumatic conveying device for conveying magnetic powder, comprising: a fan, a feeding device, a conveying pipeline, a dust removal device, and a separation and collection device arranged in sequence along the direction of gas flow, wherein the conveying pipeline includes a straight pipe and a curved pipe; the curved pipe includes a curved transition section, one end of the curved transition section is provided with a first connection port, and the other end is provided with a second connection port; The bending transition section is an asymmetrical bending structure, forming a groove space; an arc-shaped pendulum piece is provided in the groove space, and the bottom of the arc-shaped pendulum piece is connected to a first spring; A high-pressure gas source is also provided on one side of the bent pipe, and the gas outlet end of the high-pressure gas source is connected to the bottom of the groove space through a connecting pipe, and a vibration buffer component is provided at the gas outlet end of the connecting pipe.

[0006] Furthermore, the vibration buffer assembly includes: a connecting block fixedly installed in the connecting pipe; a second spring connected to the top of the connecting block; and a piston connected to the other end of the second spring. The piston consists of a first cylinder, a second cylinder, and a third cylinder connected in sequence from top to bottom, and an air flow channel is formed between the first cylinder and the third cylinder.

[0007] Furthermore, a first air outlet and a second air outlet are symmetrically provided on the left and right side walls of the connecting pipe near the top. When the piston slides upward, the air flow channel is connected to the first air outlet and the second air outlet respectively.

[0008] Furthermore, the first air outlet is connected to the vibrator, and the second air outlet is connected to the housing.

[0009] Furthermore, the outer shell is cylindrical as a whole and hollow inside, forming a circular installation space. The air inlet end of the circular space is connected to the second air outlet, and the air outlet end of the circular space is located on the side opposite to the air inlet end; the outer shell is coaxially connected to the fan blade, and the other end of the fan blade is coaxially connected to the swing blade.

[0010] Furthermore, the blade of the swing blade changes in length in a step-by-step manner from the root to the end.

[0011] Furthermore, a connecting rod is fixedly installed on the top of the connecting tube, a hinged rod is connected to the connecting rod, the bottom end of the hinged rod is hinged to the top of the first cylinder, and the top end of the hinged rod is hinged to the bottom of the shell.

[0012] Furthermore, buffer powder is placed on the arc-shaped swing piece.

[0013] Furthermore, an inverted conical hole is opened on the surface of the arc-shaped swing piece, the diameter of the inverted conical hole gradually increases from top to bottom, and an anti-blocking piece is slidably installed in the inverted conical hole.

[0014] Furthermore, the anti-blocking member includes a connecting column, a plug arranged at the top of the connecting column, and a connecting piece arranged at the bottom of the connecting column, and the connecting piece is used to connect adjacent plugs.

[0015] Compared with the prior art, the present invention has the following beneficial effects: the present invention can reduce the occurrence of magnetic powder agglomeration and reduce the wear caused by the magnetic powder on the inner wall of the pipe by setting a bending transition section, setting an arc-shaped pendulum in the bending transition section, and setting a vibration buffer component. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0017] Figure 1 This is a schematic structural diagram of a pneumatic conveying device for conveying magnetic powder according to the present invention; Figure 2 A schematic plan view of a pneumatic conveying device for conveying magnetic powder according to the present invention; Figure 3The present invention is a pneumatic conveying device for conveying magnetic powder Figure 2 A partial enlarged schematic diagram of part A; Figure 4 The present invention is a pneumatic conveying device for conveying magnetic powder Figure 3 A partial enlarged schematic diagram of part B; Figure 5 The present invention is a pneumatic conveying device for conveying magnetic powder Figure 4 A partial enlarged schematic diagram of part C in the middle; Figure 6 The figure is a partial structural schematic diagram of an anti-blocking component of a pneumatic conveying device for conveying magnetic powder according to the present invention.

[0018] In the figure: 1. Fan; 2. Storage chamber; 3. Feeding device; 4. Conveying pipeline; 5. Dust removal device; 6. Separation and collection device; 7. High-pressure air source; 8. Bend pipe; 81. Bending transition section; 82. First connecting port; 83. Second connecting port; 84. Groove space; 9. Arc-shaped pendulum; 10. Buffer powder; 11. First spring; 12. Vibration buffer assembly; 13. Connecting block; 14. Second spring; 15. Piston; 16. Air flow channel; 17. Articulated rod; 18. Housing; 19. Fan blade; 20. Vibrator; 21. Swinging blade; 22. Valve; 151. First cylinder; 152. Second cylinder; 153. Third cylinder; 91. Inverted cone hole; 92. Anti-blocking part; 23. Connecting pipe. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments.

[0020] In the description of the present invention, it should be understood that the terms "center", "transverse", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" 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, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention. When a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a centered component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centered component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a centered component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0021] like Figures 1 to 6 As shown, the present invention relates to a pneumatic conveying device for conveying magnetic powder, comprising: a fan 1 for sucking in air and sending it out under pressure.

[0022] The feeding device 3 includes a storage chamber 2 and a feeding mechanism for regulating the material flow, wherein the feeding mechanism is preferably a rotary feeder; the magnetic powder falls from the storage bin into the rotary feeder and is continuously pushed to the discharge end as the spiral blade rotates, thereby achieving uniform feeding.

[0023] The conveying pipe 4 is composed of pipeline components such as a straight pipe and a curved pipe 8. The straight pipe is used for linear conveying, and the curved pipe 8 is used to change the conveying direction. The straight pipe and the curved pipe 8 are connected by a flange to form a closed channel to ensure that the magnetic powder is smoothly conveyed with the airflow; the conveying pipe 4 can be made of plastic material or a material that does not contain copper and zinc elements. A protective coating can be sprayed on the inner wall of the conveying pipe 4.

[0024] The dust removal device 5 is used to purify the conveying air flow and remove dust particles in the air flow; taking a common bag-type dust collector as an example, the bag-type dust collector includes a sealed casing with multiple interconnected filter bag chambers inside. A number of bag filter bags are installed in each chamber. The dust-laden gas enters from the inlet of the sealed casing and passes through the filter bags. The dust is trapped on the filter bags, and the purified gas is discharged from the other side to achieve a filtering effect, and is removed by backblowing the filter bags or centrifugal separation.

[0025] The separation and collection device 6 is used to separate the magnetic powder in the pipeline from the conveying gas and collect the magnetic powder.

[0026] The curved pipe 8 includes a curved transition section 81, one end of the curved transition section 81 is provided with a first connecting port 82, and the other end is provided with a second connecting port 83, the first connecting port 82 and the second connecting port 83 are respectively used to connect straight pipes; a valve 22 is provided on the side wall of the curved pipe 8 for relieving pressure when needed.

[0027] The bending transition section 81 is an asymmetric bending structure, with a small curvature of the upper bending transition and a gentle transition. The lower bending section has a large bending angle and a depth and thickness greater than that of a straight pipe. The lower bending transition curvature is large and extends obliquely relative to the horizontal plane. Specifically, it bends first to the upper right and then to the second connection port 83, so that the lower bending forms a groove space 84. During the pneumatic conveying process, the magnetic powder is washed onto the inner wall of the groove space 84 by the action of the airflow. The provision of the groove space 84 can avoid the sudden drop in pressure caused by the expansion of the eddy current zone, maintain the stability of the airflow velocity in the pipeline, and thus reduce the impact speed of the magnetic powder on the side wall of the bent pipe 8. In addition, since the magnetic powder is hard, it is easy to cause wear on the inner wall of the pipeline, thereby delaying the wear of the bent pipe 8. The groove space 84 can also increase the internal space of the pipeline by weakening the particle agglomeration caused by the magnetic field gradient, thereby playing a bearing and installation role.

[0028] An arc-shaped pendulum 9 is connected to the groove space 84. The arc-shaped pendulum 9 is in the shape of a thin sheet and can be made of austenitic stainless steel or rubber material; the bottom of the arc-shaped pendulum 9 is connected to a first spring 11, and the other end of the first spring 11 is connected to the inner wall of the curved pipe 8; buffer powder 10 can be pre-placed on the arc-shaped pendulum 9, and the buffer powder 10 can be selected from magnetic powder to be transported or non-magnetic powder. The use of magnetic powder can be continuously replenished during the transportation process, and the use of non-magnetic powder can reduce the possibility of accumulation, and the powder can be processed by the dust removal device 5; during the pneumatic conveying process, when the gas carrying magnetic powder passes through the arc-shaped pendulum 9, it impacts the pre-placed buffer powder 10, and the impact is absorbed and dispersed by the buffer powder 10 many times, which can significantly reduce the impact wear on the inner wall of the curved pipe 8; at the same time, the gas will also drive the arc-shaped pendulum 9 to vibrate slightly, thereby improving the dispersion efficiency.

[0029] A high-pressure gas source 7 is further provided on one side of the curved pipe 8 , and a gas outlet end of the high-pressure gas source 7 is connected to the bottom of the groove space 84 via a connecting pipe 23 .

[0030] A vibration buffer assembly 12 is provided at the air outlet end of the connecting pipe 23; the vibration buffer assembly 12 includes: a connecting block 13 fixedly installed in the connecting pipe 23, and an air flow hole is provided on the connecting block 13 so that gas can pass through the connecting block 13; the top of the connecting block 13 is connected to a second spring 14; the other end of the second spring 14 is connected to a piston 15, and the piston 15 is slidably installed in the connecting pipe 23; the piston 15 is composed of a first cylinder 151, a second cylinder 152, and a third cylinder 153 connected in sequence from top to bottom, and the cross-section of the three cylinders is generally in the shape of an "I"; a vent is provided on the third cylinder 153 so that gas can pass through; an air flow channel 16 is formed between the first cylinder 151 and the third cylinder 153; when the high-pressure gas source 7 is started, the gas is filled into the air flow channel 16 through the connecting pipe 23, the connecting block 13, and the third cylinder 153 in sequence, thereby causing the piston 15 to slide upward as a whole.

[0031] A first air outlet and a second air outlet are symmetrically provided on the side walls on the left and right sides near the top of the connecting pipe 23. The first air outlet and the second air outlet are arranged on the path where the piston 15 slides upward. When the piston 15 slides upward, the air flow channel 16 is connected to the first air outlet and the second air outlet respectively.

[0032] The first air outlet is connected to a vibrator 20, and the second air outlet is connected to the outer shell 18; the vibrator 20 is preferably a pneumatic ball vibrator or a pneumatic vibrator; taking the pneumatic ball vibrator as an example, the vibrating end of the pneumatic ball vibrator is in contact with the bottom of the arc-shaped pendulum 9, and when ventilated, the high-density steel ball inside it hits the arc-shaped pendulum 9 in the vibration cavity, which can generate strong vibration and impact; the outer shell 18 is cylindrical as a whole, and its interior is hollow, forming a circular installation space, the air inlet end of the circular space is connected to the second air outlet, and the air outlet end of the circular space is located on the side opposite to the air inlet end.

[0033] A connecting rod is fixedly installed on the top of the connecting tube 23, and a hinged rod 17 is connected to the connecting rod. The hinged rod 17 is slidably connected to the connecting rod or hinged to the connecting rod. The sliding direction is the direction in which the hinged rod 17 approaches or moves away from the arc-shaped swing piece 9. The sliding direction can be guided by setting a common limit block; the bottom end of the hinged rod 17 is hinged to the top of the first cylinder 151, and the top end of the hinged rod 17 is hinged to the bottom of the outer shell 18; the outer shell 18 is coaxially connected to the fan blade 19, and the other end of the fan blade 19 is coaxially connected to the swing blade 21; the blade of the swing blade 21 changes in length in a stepped manner from the root to the end, and the blade at the end is half exposed to the outside of the buffer powder 10.

[0034] Optionally, a plurality of inverted conical holes 91 are provided on the surface of the arc-shaped pendulum piece 9. The aperture of the inverted conical holes 91 gradually increases from top to bottom. An anti-blocking member 92 is slidably installed in the inverted conical hole 91. The anti-blocking member 92 is located between the arc-shaped pendulum piece 9 and the outer shell 18. The anti-blocking member 92 is used to prevent the inverted conical hole 91 from being blocked and to open the inverted conical hole 91. The anti-blocking member 92 includes a connecting column, a plug provided at the top of the connecting column, and a connecting piece provided at the bottom of the connecting column. The connecting piece is used to connect adjacent plugs so that the plugs can synchronously block the inverted conical hole 91 or be separated from the inverted conical hole 91. The connecting column passes through the inverted conical hole 91 of the arc-shaped pendulum piece 9 from bottom to top and slides with the inverted conical hole 91. The plug is located above the arc-shaped pendulum piece 9 and is used to block the inverted conical hole 91 provided on the arc-shaped pendulum piece 9. When the anti-blocking member 92 is separated from the inverted conical hole 91, the connecting piece 92 is opened. When the pneumatic ball vibrator and the outer shell 18 are separated, the anti-blocking member 92 and the inverted conical hole 91 are misaligned and matched, so that the inverted conical hole 91 is in an open state, thereby realizing the intermittent ventilation function. At this time, the air discharged from the pneumatic ball vibrator and the outer shell 18 is discharged into the buffer powder 10 on the upper layer of the arc-shaped pendulum 9 through the inverted conical hole 91. The airflow can make the buffer powder 10 locally fluidized, thereby cutting off the aggregation of magnetic chains; in addition, a third through hole can also be opened on the connecting pipe 23 to allow the gas to be directly discharged into the groove space 84 to increase the pressure.

[0035] When the high-pressure gas source 7 is started, the high-pressure gas is blown into the connecting pipe 23 and drives the piston 15 to slide upward. During the sliding process, the anti-blocking piece 92 is misaligned with the inverted conical hole 91, so that the inverted conical hole 91 is in an open state. At this time, the gas in the groove space 84 can be discharged from the inverted conical hole 91 into the buffer powder 10; in this process, the piston 15 drives the outer shell 18 to slide toward the arc-shaped pendulum piece 9 through the hinge rod 17, and squeezes the arc-shaped pendulum piece 9, causing the arc-shaped pendulum piece 9 to deform, and at the same time causes the fan blade 19 to move axially, thereby axially stirring the buffer powder 10; then, the piston 15 is connected to the first air outlet and the second air outlet respectively, so that the high-pressure gas is blown out from the first air outlet and the second air outlet respectively; the high-pressure gas blown out from the first air outlet drives the air The pneumatic vibrator 20 is driven by the pneumatic ball vibrator, thereby vibrating the arc-shaped pendulum 9, and further breaking up the agglomeration of the buffer powder 10 on the arc-shaped pendulum 9; at the same time, the high-pressure gas blown out from the second air outlet drives the gas into the interior of the outer shell 18, drives the fan blades 19 to rotate, and flows out from the air outlet end of the outer shell 18. During the rotation of the fan blades 19, the swing blades 21 are driven to rotate coaxially, and the powder enters from the root of the blades, and is broken layer by layer through the different shear strengths of the middle and end sections in turn, avoiding a one-time impact that is too strong and cannot penetrate into the inner layer agglomeration; when the high-pressure gas source 7 stops supplying gas, the second spring 14 drives the piston 15 to reset, and then drives the hinged rod 17 and the outer shell 18 to reset; in addition, at least two outer shells 18 can be provided, and the kneading effect can be achieved through intermittent air supply and reset.

[0036] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology. It will not be described in detail here. The content not described in detail in this specification belongs to the existing technology known to professional and technical personnel in this field.

[0037] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A pneumatic conveying device for conveying magnetic powder, comprising: A fan (1), a feeding device (3), a conveying pipe (4), a dust removal device (5), and a separation and collection device (6) are sequentially arranged along the gas flow direction, wherein the conveying pipe (4) comprises a straight pipe and a curved pipe (8); the curved pipe (8) comprises a bent transition section (81), and one end of the bent transition section (81) is provided with a first connecting port (82), and the other end is provided with a second connecting port (83); The bending transition section (81) is an asymmetrical bending structure, forming a groove space (84); an arc-shaped pendulum piece (9) is provided in the groove space (84), and the bottom of the arc-shaped pendulum piece (9) is connected to a first spring (11); A high-pressure gas source (7) is also provided on one side of the curved pipe (8), and the gas outlet end of the high-pressure gas source (7) is connected to the bottom of the groove space (84) via a connecting pipe (23), and a vibration buffer component (12) is provided at the gas outlet end of the connecting pipe (23).

2. A pneumatic conveying device for conveying magnetic powder according to claim 1, characterized in that: The vibration buffer assembly (12) comprises: a connecting block (13) fixedly mounted in the connecting pipe (23); a second spring (14) connected to the top of the connecting block (13); and a piston (15) connected to the other end of the second spring (14). The piston (15) is composed of a first cylinder (151), a second cylinder (152), and a third cylinder (153) connected in sequence from top to bottom, and an air flow channel (16) is formed between the first cylinder (151) and the third cylinder (153).

3. A pneumatic conveying device for conveying magnetic powder according to claim 2, characterized in that: A first air outlet and a second air outlet are symmetrically provided on the left and right side walls of the connecting pipe (23) near the top. When the piston (15) slides upward, the air flow channel (16) is connected to the first air outlet and the second air outlet respectively.

4. A pneumatic conveying device for conveying magnetic powder according to claim 3, characterized in that: The first air outlet is connected to a vibrator (20), and the second air outlet is connected to a housing (18).

5. A pneumatic conveying device for conveying magnetic powder according to claim 4, characterized in that: The outer shell (18) is cylindrical in shape as a whole and hollow inside, forming a circular installation space. The air inlet end of the circular space is connected to the second air outlet, and the air outlet end of the circular space is located on the side opposite to the air inlet end. The outer shell (18) is coaxially connected to the fan blade (19), and the other end of the fan blade (19) is coaxially connected to the swing blade (21).

6. A pneumatic conveying device for conveying magnetic powder according to claim 5, characterized in that: The blade of the swing blade (21) changes in length in a step-like manner from the root to the end.

7. A pneumatic conveying device for conveying magnetic powder according to claim 5, characterized in that: A connecting rod is fixedly mounted on the top of the connecting tube (23), and a hinged rod (17) is connected to the connecting rod. The bottom end of the hinged rod (17) is hinged to the top of the first cylinder (151), and the top end of the hinged rod (17) is hinged to the bottom of the housing (18).

8. The pneumatic conveying device for conveying magnetic powder according to claim 1, characterized in that: Buffer powder (10) is placed on the arc-shaped swing piece (9).

9. A pneumatic conveying device for conveying magnetic powder according to claim 8, characterized in that: An inverted tapered hole (91) is provided on the surface of the arc-shaped swing piece (9), wherein the diameter of the inverted tapered hole (91) gradually increases from top to bottom, and an anti-blocking member (92) is slidably installed in the inverted tapered hole (91).

10. The pneumatic conveying device for conveying magnetic powder according to claim 9, characterized in that: The anti-blocking member (92) comprises a connecting column, a plug provided at the top of the connecting column, and a connecting piece provided at the bottom of the connecting column, wherein the connecting piece is used to connect adjacent plugs.

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