A powder conveying structure and conveying pipe

Abstract

The present invention discloses a powder conveying structure and a conveying pipe, and belongs to the technical field of powder anti-blocking conveying. The present invention comprises a turntable, and gas passing through the turntable can cause the turntable to rotate, and the side of the turntable away from the powder entry is connected to one end of a flexible telescopic strip, and the other end of the telescopic strip is a free end. The free end of the telescopic strip can be extended or shortened, and an increase in the rotation speed of the turntable can cause the free end of the telescopic strip to extend, and a decrease in the rotation speed of the turntable can cause the free end of the telescopic strip to shorten. The present invention sets a turntable, and gas passing through the turntable can drive the turntable to rotate, and the turntable can be set at a right-angle bend. By setting a flexible telescopic strip on the side of the turntable away from the powder entry, when the turntable rotates, the telescopic strip directly contacts and sweeps the powder accumulated at the right-angle bend to prevent the powder from accumulating.

Description

Technical Field

[0001] The invention relates to the technical field of powder material anti-blocking conveying, and in particular to a powder material conveying structure and a conveying pipe. Background Art

[0002] Pneumatic conveying system is a system that transports solid particulate materials to different locations through compressed air. It is widely used in many industries and has the advantages of high efficiency, speed, dust-free pollution, simple operation, energy saving and environmental protection.

[0003] Pneumatic conveying systems can achieve long-distance transportation. For example, in the field of food processing, pneumatic conveying systems can transport common powdered materials such as flour, powdered sugar, milk powder, seasoning powder, etc., referred to as powders. These powders usually need to be transported from the raw material warehouse to the processing equipment during the production process, and then mixed, processed, and packaged. Pneumatic conveying systems can perfectly meet this series of needs, ensuring that the powder does not scatter or get damp during the transportation process, avoiding pollution and waste.

[0004] There are multiple conveying pipes in the pneumatic conveying system, and some adjacent conveying pipes are perpendicular to each other to form right-angle bends. When the powder itself is not dry enough or the pneumatic conveying operation is carried out for a long time, some powder will gradually accumulate at the right-angle bend and block the conveying pipe. Summary of the invention

[0005] In view of the above-mentioned shortcomings, the present invention provides a powder conveying structure and a conveying pipe, wherein the powder conveying structure can prevent powder accumulation at the right-angle bend and avoid clogging the conveying pipe.

[0006] The first aspect of the present invention protects a powder conveying structure, which comprises a turntable, gas passing through the turntable can make the turntable rotate, the side of the turntable away from the powder entry is connected to one end of a flexible telescopic strip, and the other end of the telescopic strip is a free end;

[0007] The free end of the telescopic strip can be extended or shortened. The increase in the rotation speed of the rotating disk can extend the free end of the telescopic strip, and the decrease in the rotation speed of the rotating disk can shorten the free end of the telescopic strip.

[0008] Furthermore, the telescopic strip comprises an outer sleeve, one end of the outer sleeve is fixed on the turntable, an inner core strip is movably provided in the outer sleeve, and the inner core strip can move away from or approach the turntable.

[0009] Furthermore, an inertia ball is provided at one end of the inner core bar away from the turntable.

[0010] Furthermore, a through hole is provided on the side wall of the outer sleeve, and the through hole is spiral-shaped;

[0011] A protrusion is provided on the side surface of the inner core bar, and the protrusion is arranged in the through hole. When the inner core bar moves away from the turntable, the protrusion moves away from the turntable in a spiral shape.

[0012] Furthermore, the side of the rotating disk facing away from the powder material entry is also connected to one end of the bending strip;

[0013] The bending strip is formed by combining a first metal layer and a second metal layer, wherein the first metal layer is close to the central axis of the rotating disk;

[0014] The thermal expansion coefficient of the first metal layer is greater than the thermal expansion coefficient of the second metal layer.

[0015] Further, the rotating disk includes an inner ring and an outer ring which are arranged concentrically;

[0016] The inner ring and the outer ring are connected via a connecting plate, and the connecting plate is arranged obliquely, so that airflow passing through the connecting plate can drive the turntable to rotate.

[0017] Furthermore, an outer peripheral piece is provided on the outer wall of the outer ring, the outer peripheral piece is arranged obliquely, and the angle between the outer peripheral piece and the horizontal plane is an acute angle.

[0018] Furthermore, a side of the rotating disk close to where the powder enters is connected to the bracket via a rotating shaft.

[0019] Furthermore, the support comprises cross-arranged beams, and a blade is provided on a side of the beams facing away from the turntable.

[0020] A second aspect of the present invention protects a conveying pipe, which comprises a vertical pipe and a horizontal pipe vertically arranged with respect to the vertical pipe, wherein the vertical pipe comprises the above-mentioned powder conveying structure.

[0021] Beneficial effects: The present invention sets a turntable, and the gas passing through it can drive the turntable to rotate, so that the turntable can be placed at a right-angle bend. By setting a flexible telescopic strip on the side of the turntable away from the powder entry, when the turntable rotates, the flexible telescopic strip follows the rotation and has two functions. The first function is that the telescopic strip directly contacts and sweeps the powder accumulated at the right-angle bend to prevent the powder from accumulating; the second function is that when the telescopic strip rotates, the free end can hit the wall of the conveying pipe to generate vibration, shake the powder off, and prevent the powder from accumulating. By setting a telescopic strip whose free end can be extended or shortened, the free end extends when the turntable speed increases, and shortens when the turntable speed decreases. At different speeds, the length of the telescopic strip is different, so that cleaning of different positions of the conveying pipe can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] in:

[0024] Figure 1 It is a schematic diagram of the overall structure of the delivery pipe in the first state in one embodiment of the present invention;

[0025] Figure 2 for Figure 1 A partial enlarged view of part A;

[0026] Figure 3 It is the main view of the first state;

[0027] Figure 4 It is a schematic diagram of the overall structure of the delivery pipe at an angle in the second state in one embodiment of the present invention;

[0028] Figure 5 It is the front view of the conveying pipe in the second state;

[0029] Figure 6 for Figure 5 A partial enlarged view of part B;

[0030] Figure 7 It is a schematic diagram of the overall structure of the delivery pipe in the second state from another angle in one embodiment of the present invention;

[0031] In the figure, 1, powder conveying structure; 11, turntable; 111, inner ring; 112, connecting plate; 113, outer ring; 114, peripheral plate; 12, telescopic strip; 121, outer sleeve; 1211, through hole; 122, inner core strip; 1221, protrusion; 1222, inertia ball; 13, bending strip; 14, bracket; 141, crossbeam; 142, blade; 15, rotating shaft;

[0032] 2. Delivery pipe; 21. Vertical pipe; 22. Horizontal pipe. DETAILED DESCRIPTION

[0033] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] refer to Figure 1 to Figure 7The first aspect of the present invention protects a powder conveying structure, which includes a turntable 11. Gas passing through the turntable 11 can cause the turntable 11 to rotate. The side of the turntable 11 that is away from the powder entry is connected to one end of a flexible telescopic strip 12, and the other end of the telescopic strip 12 is a free end. One side of the turntable 11 faces the feed end, which is the air inlet end; the other side of the turntable 11 faces the discharge end, which is the air outlet end. The turntable 11 is provided with one side of the telescopic strip 12 facing the discharge end. Figure 3 For example, the bottom of the conveying pipe in the figure is the feed end, and the right end of the conveying pipe is the discharge end. This figure only represents the right-angle bend position in the pneumatic conveying system, not the entire conveying pipeline.

[0035] The free end of the telescopic strip 12 can be extended or shortened. The increase in the rotation speed of the turntable 11 can extend the free end of the telescopic strip 12, and the decrease in the rotation speed of the turntable 11 can shorten the free end of the telescopic strip 12. The free end of the telescopic strip 12 begins to extend only when the turntable 11 rotates to a certain speed, not when it just starts to rotate, and reaches the extension limit when the free end extends to a certain extent and will not continue to extend. Similarly, the free end of the telescopic strip 12 begins to retract only when the rotation speed of the turntable 11 is lower than a certain speed, not when it just starts to decelerate, and stops retracting when it retracts to the initial state.

[0036] The present invention sets a turntable 11, and the gas passing through can drive the turntable 11 to rotate, and the turntable 11 can be set at a right-angle bend. By setting a flexible telescopic strip 12 on the side of the turntable 11 away from the powder entering, when the turntable 11 rotates, the flexible telescopic strip 12 follows the rotation and has two functions. The first function is that the telescopic strip 12 directly contacts and sweeps the powder accumulated at the right-angle bend to prevent the powder from accumulating; the second function is that when the telescopic strip 12 rotates, the free end can knock the pipe wall of the conveying pipe to generate vibration, shake the powder off, and prevent the powder from accumulating. By setting the telescopic strip 12 whose free end can be extended or shortened, the free end is extended when the speed of the turntable 11 increases, and the free end is shortened when the speed of the turntable 11 decreases. At different speeds, the length of the telescopic strip 12 is different, so that cleaning of different positions of the conveying pipe is achieved. The telescopic strip 12 can interfere with the movement trajectory of the powder to different degrees as the turntable 11 rotates at different speeds, and the different movement trajectories of the powder can also prevent the powder from accumulating at the right-angle bend.

[0037] refer to Figure 2 , Figure 5 or Figure 6 In a specific embodiment, the telescopic strip 12 includes an outer sleeve 121 , one end of which is fixed on the turntable 11 , and an inner core strip 122 is movably provided in the outer sleeve 121 , and the inner core strip 122 can move away from or approach the turntable 11 .

[0038] In this embodiment, the outer sleeve 121 and the inner core strip 122 are provided, and the inner core strip 122 can be partially pulled out from the outer sleeve 121. Since one end of the outer sleeve 121 is fixed on the turntable 11, when the turntable 11 rotates, the inner core strip 122 can be thrown out from the free end of the outer sleeve 121 by inertia, so as to achieve the extension of the telescopic strip 12. By extending the telescopic strip 12 by inertia, the length of the telescopic strip 12 can be controlled by the speed of the turntable 11, and the implementation method is simple and reliable.

[0039] refer to Figure 2 or Figure 7 In a specific embodiment, an inertia ball 1222 is provided at one end of the inner core strip 122 away from the turntable 11. The inertia ball 1222 is a metal ball. The metal ball itself has a certain weight and a large inertia. When the turntable 11 rotates, the metal ball can be thrown out, and then the inner core strip 122 is pulled out from the outer sleeve 121, so that the telescopic strip 12 is extended. Among them, the material of the metal ball is preferably stainless steel, because stainless steel contains a certain amount of chromium elements, which react with oxygen to form a dense chromium oxide protective film, which effectively prevents the contact between the inside of the steel and the external environment and prevents the occurrence of corrosion. In addition, elements such as nickel and molybdenum further enhance the corrosion resistance and pitting resistance of stainless steel. In this way, the metal ball can be prevented from being corroded by the powder and reacting with the material. In addition, the inertia ball 1222 is a metal ball. When it hits the conveying pipe, the vibration effect of the conveying pipe is good, which can effectively shake off the powder and prevent the powder from accumulating.

[0040] refer to Figure 6 In a specific embodiment, a through hole 1211 is provided on the side wall of the outer sleeve 121, and the through hole 1211 is spiral. The through hole 1211 is provided as a single whole, one end of the through hole 1211 is close to the top of the outer sleeve 121, and the other end of the through hole 1211 spirally extends toward the bottom of the outer sleeve 121 to form a spiral through hole 1211. Specifically, a spring can be used instead of the outer sleeve 121, and the gap between the spring coils is the through hole 1211. The steel wire diameter of the spring itself is relatively thick, and the gap between the steel wires is relatively narrow, which can prevent the spring from being deformed when the turntable 11 rotates at a high speed.

[0041] A protrusion 1221 is provided on the side of the inner core bar 122 . The protrusion 1221 is disposed in the through hole 1211 . When the inner core bar 122 moves away from the turntable 11 , the protrusion 1221 moves away from the turntable 11 in a spiral shape.

[0042] by Figure 6For example, in this embodiment, the protrusion 1221 and the through hole 1211 are provided so that the protrusion 1221 can spirally rise or fall along the through hole 1211, so that the protrusion 1221 can self-rotate when the inner core strip 122 is extended or retracted in the outer sleeve 121. In this way, the inertia of the inertia ball 1222 can be converted into the self-rotation of the inner core strip 122, preventing the outer sleeve 121 from being broken due to excessive inertia; at the same time, the swinging direction of the inner core strip 122 can be limited to a certain extent, preventing the inner core strip 122 from excessively hitting the conveying pipe.

[0043] refer to Figure 1 to Figure 7 Any one, Figure 1~Figure 3 The bending strip 13 in the embodiment is not bent, Figure 4~Figure 7 The bending strip 13 in the rotating disk 11 is bent. In a specific embodiment, the side of the rotating disk 11 away from the powder entry is also connected to one end of the bending strip 13. The bending strip 13 is formed by combining a first metal layer and a second metal layer, and the first metal layer is close to the central axis of the rotating disk 11. The thermal expansion coefficient of the first metal layer is greater than the thermal expansion coefficient of the second metal layer. According to actual needs, the bending strip 13 can be plate-shaped or cylindrical. Regardless of the shape of the bending strip 13, it has a first metal layer and a second metal layer. Among them, the metal of the first metal layer can be selected from the expansion coefficient of: zinc with 36.0x10^(-6) / ℃, manganese with 23.0x10^(-6) / ℃, cadmium with 41.0x10^(-6) / ℃ or aluminum with 23.1x10^(-6) / ℃. The metal of the second metal layer can be selected from iron with an expansion coefficient of 12x10^(-6) / °C, copper with an expansion coefficient of 16.9x10^(-6) / °C, or titanium with an expansion coefficient of 10.8x10^(-6) / °C.

[0044] In this embodiment, the bending strip 13 is provided. Since the expansion coefficient of the first metal layer is greater than that of the second metal layer, the bending strip 13 can bend outward when the temperature is high. In this way, when the turntable 11 rotates, the bending strip 13 can hit the conveying pipe, thereby vibrating the powder to fall and prevent clogging. By providing the bending strip 13, when the rotation speed of the turntable 11 is not high, the function of preventing the conveying pipe from being blocked can also be achieved when the temperature is high.

[0045] refer to Figure 2 In a specific embodiment, the rotating disk 11 includes an inner ring 111 and an outer ring 113 which are arranged concentrically. The inner ring 111 and the outer ring 113 are connected by a connecting plate 112, and the connecting plate 112 is arranged obliquely. The airflow passing through the connecting plate 112 can drive the rotating disk 11 to rotate.

[0046] By setting the inner ring 111 and the outer ring 113, the gas can pass smoothly. The telescopic strip 12 and the bending strip 13 are both arranged on the inner ring 111, and the number of the telescopic strip 12 and the bending strip 13 is no more than 3, the telescopic strip 12 can be 1, 2 or 3, and the bending strip 13 can be 1, 2 or 3. Because too many will also cause obstruction to the powder, and then form a blockage. Similarly, the ring body of the inner ring 111 and the ring body of the outer ring 113 are as narrow as possible to prevent blocking the powder. The number of connecting plates 112 is two or three. The connecting plate 112 is arranged at an angle, and when the gas passes through the connecting plate 112, it can push the connecting plate 112 to move in the horizontal plane, thereby driving the turntable 11 to rotate. The connecting plate 112 in this embodiment can be used as a connecting member of the inner ring 111 and the outer ring 113, and can also be used as a driving member for the rotation of the turntable 11. Effectively reduce the components in the turntable 11 to prevent the turntable 11 from blocking the powder.

[0047] refer to Figure 2 In a specific embodiment, an outer peripheral sheet 114 is provided on the outer wall of the outer ring 113. The outer peripheral sheet 114 is provided at an angle, and the angle between the outer peripheral sheet 114 and the horizontal plane is an acute angle. The outer peripheral sheet 114 is provided for two purposes in this embodiment. The first purpose is that the gas passes through the outer peripheral sheet 114 to increase the driving force of the turntable 11; the second purpose is to reduce the movement of part of the material close to the wall of the conveying pipe. Figure 3 If the powder moves upward along the wall of the conveying pipe, it is easy to accumulate at the corner of the upper left corner. After the peripheral sheet 114 is set, the peripheral sheet 114 can block part of the powder, or interfere with the movement trajectory of the powder, so that the powder passes through the middle position of the turntable 11 as much as possible, preventing the powder from accumulating at the corner of the conveying pipe.

[0048] refer to Figure 3 or Figure 5 In a specific embodiment, the side of the turntable 11 close to the powder entry is connected to the bracket 14 through the rotating shaft 15. The volume of the bracket 14 itself should be as small as possible, preferably a plate-shaped bracket 14 to reduce the obstruction of the powder. In this embodiment, by setting the bracket 14, the working stability of the turntable 11 is increased. The telescopic strip 12 can better clean the accumulated powder.

[0049] refer to Figure 6 In a specific embodiment, the support 14 includes cross beams 141, and a blade 142 is provided on the side of the cross beam 141 facing away from the turntable 11. The number of cross beams 141 is 1, 2 or 3. Preferably, there are 2 cross beams 141, which are vertically arranged. Such an arrangement has high stability and does not affect the passability of the powder. The cross beam 141 is plate-shaped, and the plane where the cross beam 141 is located is perpendicular to the plane where the turntable 11 is located. Figure 6The bottom side of the crossbeam 141 is provided with a blade 142. The blade 142 has two functions. The first function is to guide the flow or reduce the resistance so that the powder can pass through the crossbeam 141 smoothly and prevent the crossbeam 141 from blocking the powder. The second function is that the blade 142 itself has a cutting effect. When there are lumps in the powder, the blade 142 can break the powder when passing through the blade 142. Avoid the accumulation of lumps of powder at the right-angle bend and cause subsequent blockage.

[0050] The second aspect of the present invention protects a conveying pipe, wherein the conveying pipe 2 includes a vertical pipe 21 and a horizontal pipe 22 arranged perpendicularly to the vertical pipe 21, and the vertical pipe 21 includes the above-mentioned powder conveying structure 1. The vertical pipe 21 and the horizontal pipe 22 are arranged perpendicularly, which only discloses a more extreme case. When the vertical pipe 21 and the horizontal pipe 22 are perpendicular, blockage can be prevented, and when the angle between the vertical pipe 21 and the horizontal pipe 22 is greater than 90°, blockage can be prevented even more. According to actual needs, the powder conveying structure 1 can be arranged near the curved pipe, or the powder conveying structure 1 can be arranged in a straight pipe to break up and change the movement trajectory of the powder, and prevent powder accumulation and blockage.

[0051] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A delivery pipe, characterized in that: The invention comprises a vertical tube (21) and a horizontal tube (22) arranged perpendicular to the vertical tube (21), wherein the vertical tube (21) comprises a rotating disk (11), and gas passing through the rotating disk (11) can cause the rotating disk (11) to rotate, and a side of the rotating disk (11) facing away from where powder enters is connected to one end of a flexible telescopic strip (12), and the other end of the telescopic strip (12) is a free end; The free end of the telescopic strip (12) can be extended or shortened; an increase in the rotation speed of the rotating disk (11) can cause the free end of the telescopic strip (12) to extend, and a decrease in the rotation speed of the rotating disk (11) can cause the free end of the telescopic strip (12) to shorten; The telescopic strip (12) comprises an outer sleeve (121), one end of the outer sleeve (121) is fixed to the rotating disk (11), an inner core strip (122) is movably provided inside the outer sleeve (121), and the inner core strip (122) can move away from or approach the rotating disk (11); An inertia ball (1222) is provided at one end of the inner core strip (122) away from the rotating disk (11), and when the rotating disk (11) rotates, the inertia ball (1222) can hit the conveying pipe; The rotating disk (11) comprises an inner ring (111) and an outer ring (113) which are arranged concentrically; The inner ring (111) and the outer ring (113) are connected via a connecting plate (112); the connecting plate (112) is arranged at an angle, and airflow passing through the connecting plate (112) can drive the rotating disk (11) to rotate; The side of the rotating disk (11) facing away from the powder material entrance is also connected to one end of the bending strip (13); The bending strip (13) is formed by combining a first metal layer and a second metal layer, and the first metal layer is close to the central axis of the rotating disk (11); The thermal expansion coefficient of the first metal layer is greater than the thermal expansion coefficient of the second metal layer. Since the thermal expansion coefficient of the first metal layer is greater than the thermal expansion coefficient of the second metal layer, when the temperature is high, the bending strip (13) can bend outward, and when the rotating disk (11) rotates, the bending strip (13) can hit the conveying pipe; A through hole (1211) is provided on the side wall of the outer sleeve (121), and the through hole (1211) is spiral-shaped; A protrusion (1221) is provided on the side surface of the inner core strip (122), and the protrusion (1221) is arranged in the through hole (1211); when the inner core strip (122) moves away from the turntable (11), the protrusion (1221) moves away from the turntable (11) in a spiral shape.

2. The delivery pipe according to claim 1, characterized in that: An outer peripheral piece (114) is provided on the outer wall of the outer ring (113); the outer peripheral piece (114) is arranged obliquely, and the angle between the outer peripheral piece (114) and the horizontal plane is an acute angle.

3. The delivery pipe according to claim 1, characterized in that: The side of the rotating disk (11) close to where the powder enters is connected to the bracket (14) via a rotating shaft (15).

4. The delivery pipe according to claim 3, characterized in that: The support (14) comprises cross-arranged crossbeams (141), and a blade (142) is provided on a side of the crossbeam (141) facing away from the rotating disk (11).

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