A conveying device for wheat flour production

Abstract

This invention relates to the field of powder conveying technology and discloses a conveying device for wheat flour production, including a U-shaped trough and multiple shafted blades. A drive module is provided at one end of the U-shaped trough, and a cover plate is fixed above the U-shaped trough. The device also includes: a central hanger bearing module, fixed within the U-shaped trough to support and connect the shafted blades; the central hanger bearing module includes a bearing seat with air holes; and a reversing air jet module, assembled within the central hanger bearing module. The reversing air jet module includes airflow baffles fixed on both sides of the bearing seat and a pneumatic feeding assembly that rotates with the shafted blades. The central hanger bearing module of this invention, with airflow baffles and a pneumatic feeding assembly on both sides of the bearing seat, utilizes an external air source system to form a swirling air curtain at the hanger bearing that rotates with the shafted blades. During screw conveyor operation, this provides power to the material flowing through the hanger bearing, allowing it to pass quickly; thereby reducing the risk of material caking and clogging at the hanger bearing.

Description

Technical Field

[0001] This invention relates to the field of powder conveying technology, and in particular to a conveying device for wheat flour production. Background Technology

[0002] Screw conveyors are continuous conveying equipment widely used in industries such as grain, feed, building materials, and chemicals. They propel materials by rotating a shaft with helical blades within a closed trough. When conveying long distances, hanger bearings must be installed in the middle to support the screw shaft and prevent blade rubbing against the casing due to deflection caused by excessive shaft span.

[0003] However, the existing hanger bearing has two inherent geometric defects: first, the bearing itself occupies the conveying cross section, reducing the effective passage area and creating a bottleneck effect; second, the spiral blades must be disconnected at the hanger bearing, creating a thrust blind zone, where the material can only be pushed through by the material behind, lacking active thrust. In flour production, flour and flour processing by-products contain high moisture content. When using a screw conveyor to transport materials, the material at the hanger bearing needs to be pushed forward by the material behind. High-moisture powdery materials are prone to caking and clogging at the hanger bearing under the pushing force, further increasing the risk of clogging. This can cause spillage or even motor overload and damage, thus affecting continuous production. Summary of the Invention

[0004] The purpose of this invention is to provide a conveying device for wheat flour production in order to solve the above problems. By introducing a reversible pneumatic drive, it actively generates axial thrust in the thrust blind zone of the hanger bearing and automatically switches the blowing direction according to the degree of material blockage, thereby achieving the goal of moving from passive adaptation to active intervention.

[0005] The present invention achieves the above objectives through the following technical solutions: A conveying device for wheat flour production includes a U-shaped trough and multiple shafted blades. A drive module is provided at one end of the U-shaped trough, and a cover plate is fixed on the top of the U-shaped trough. The device also includes a central hanging bearing module, which is fixed in the U-shaped trough to support and connect the shafted blades. The central hanging bearing module includes a bearing seat with air holes. The reversing jet module is assembled inside the central bearing module. The reversing air blowing module includes airflow baffles fixed on both sides of the bearing seat and pneumatic feeding components that rotate with the shaft blades. The airflow baffles have airflow channels in opposite directions, and the pneumatic feeding components have nozzles with adjustable directions. The nozzles and airflow channels are mating mechanisms. The air source system is connected to the air holes provided in the bearing seat through the air passage. The reversing control valve is located in the air passage and controls the airflow direction. When compressed air flows into the forward airflow channel of the airflow baffle through the bearing seat, the pneumatic feeding components on both sides of the bearing seat simultaneously generate airflow thrust along the spiral shaft and in the same axial direction. When the reversing control valve switches the airflow direction, the reverse airflow channels of the airflow baffles on both sides of the bearing seat are vented, and the pneumatic feeding components provide reverse airflow thrust accordingly, realizing alternating forward and reverse air blowing.

[0006] Preferably, the bearing housing is provided with an oil injection hole for bearing lubrication, and a first air intake channel and a second air intake channel are respectively provided on both sides of the oil injection hole. A transverse through hole is provided at the bottom of the first air intake channel and the second air intake channel. The first air intake channel and the second air intake channel are respectively connected to the air source system.

[0007] Preferably, the airflow baffle includes a baffle body fixed at both ends of the bearing housing. The baffle body has an inner ring air inlet groove and an outer ring air inlet groove on the end face away from the bearing housing. The inner ring air inlet groove and the outer ring air inlet groove on both sides of the bearing housing are respectively connected to the first air inlet channel and the second air inlet channel.

[0008] Preferably, the intermediate bearing module also includes a bearing embedded in the bearing housing, a connecting shaft for connecting the shafted blades, and a hanger mounting plate for fixing the bearing housing. The airflow baffle is fixed to the bearing housing and limits the bearing.

[0009] Preferably, the pneumatic feeding assembly includes an annular plate disposed between the swivel blade and the airflow baffle. The annular plate is engaged and limited by the connecting shaft. Multiple fan-shaped grooves are circumferentially opened at one end of the annular plate near the airflow baffle. A notch is provided in the middle of the outer arc surface of the fan-shaped groove. A fan-shaped air nozzle is fitted inside the fan-shaped groove. A limiting shaft is provided between the fan-shaped air nozzle and the fan-shaped groove. The fan-shaped air nozzle is rotatably engaged with the limiting shaft. A second chamber and a first chamber are respectively opened inside the fan-shaped air nozzle corresponding to the inner ring air inlet groove and the outer ring air inlet groove.

[0010] Preferably, the fan-shaped nozzle includes an airflow baffle welded and fixed in the second chamber and the first chamber, and the first chamber and the second chamber are provided with air jets with opposite inclination directions, and a guide plate is fixedly welded inside the air jet.

[0011] Preferably, it also includes a dust suppression mechanism, which is located on the unloading side of the central bearing module and is used to suppress the flow of dust generated by the pneumatic feeding component. The dust suppression mechanism includes a dust suppression base plate, a labyrinth baffle is fixed on the lower end face of the dust suppression base plate, the bottom of the labyrinth baffle fits with the shafted rotary blade to form a sealing structure, a plug-in plate is fixed on the lower end face of the dust suppression base plate, a limit slot is fixed on the U-shaped groove corresponding to the plug-in plate, the dust suppression base plate and the U-shaped groove are plugged in and matched, and a self-cleaning component that matches the shafted rotary blade is provided at the center of the dust suppression base plate.

[0012] Preferably, the self-cleaning component includes a hinge seat fixed at the center of the dust-suppressing base plate, a swing shaft rotatably fitted on the hinge seat, a counterweight ball rotatably fitted at the lower end of the swing shaft, a striker fixed on the swing shaft, and a fixing block that is a mating mechanism with the striker fixed on the lower end face of the dust-suppressing base plate.

[0013] Preferably, it also includes a buffer gas tank, which is respectively located between the reversing control valve and the first intake channel and the second intake channel.

[0014] Preferably, it also includes a current monitoring module and a controller. The current monitoring module collects the current signal of the motor in the drive module in real time. The controller judges the blockage status based on the motor current signal and controls the reversing control valve to switch the corresponding working mode: normal mode: the current is lower than the threshold and the air is continuously blown in the forward direction; unblocking mode: the current is higher than the threshold and the air is blown alternately in the forward and reverse directions.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The hanging bearing module of the present invention has airflow baffles and pneumatic feeding components on both sides of the bearing seat. Through an external air source system, high-pressure air is used to form a swirling air curtain at the hanging bearing that rotates with the shaft blades. When the screw conveyor is in operation, it provides power for the material flowing through the hanging bearing, so that it can pass through quickly; thereby reducing the risk of material being squeezed and caking at the hanging bearing and causing blockage.

[0016] 2. The fan-shaped nozzle and airflow baffle of the present invention, by setting up a dual airflow channel and controlling the deflection of the fan-shaped nozzle by changing the air supply channel, realize the adjustment of the jet direction, so that the fan-shaped nozzle can jet backward. The multiple fan-shaped nozzles set at both ends of the bearing seat work together to disperse and clear the material by alternating jetting back and forth in the early stage of material blockage, thereby reducing the probability of material blockage at the bearing.

[0017] 3. The dust suppression mechanism of this invention reduces the dust that will inevitably be generated when the fan-shaped air nozzle pushes the material through the labyrinth baffle, making up for the shortcomings of pneumatic blowing. The self-cleaning component performs periodic vibration cleaning with the belt shaft blades, keeping the labyrinth baffle clean and preventing the material from gradually adsorbing onto the surface of the labyrinth baffle and forming a blockage. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of a conveying device for wheat flour production according to the present invention; Figure 2 This is a schematic diagram of the hanger bearing area in a conveying device for wheat flour production according to the present invention; Figure 3 This is an assembly diagram of the hanging bearing module described in this invention; Figure 4 This is a schematic diagram of the airflow baffle described in this invention; Figure 5 This is a schematic diagram of the structure of the pneumatic feeding assembly described in this invention; Figure 6 This is a schematic diagram of the internal structure of the fan-shaped air nozzle described in this invention; Figure 7 This is an assembly diagram of the dust suppression mechanism described in this invention; Figure 8 This is the present invention. Figure 7 A magnified view of area A in the middle.

[0020] The annotations in the attached figures are explained as follows: 1. U-shaped channel; 2. Drive module; 3. Rotary blade with shaft; 4. Cover plate; 5. Middle hanger bearing module; 6. Dust suppression mechanism; 51. Hanger mounting plate; 52. Bearing seat; 53. Bearing; 54. Connecting shaft; 55. Airflow baffle; 56. Pneumatic feeding assembly; 61. Limit slot; 62. Dust suppression base plate; 63. Insertion plate; 64. Labyrinth baffle; 65. Self-cleaning assembly; 521. First air intake channel; 522. Second air intake channel; 52 3. Oil injection hole; 551. Partition body; 552. Inner ring air inlet groove; 553. Outer ring air inlet groove; 561. Ring plate; 562. Fan-shaped groove; 563. Limiting shaft; 564. Fan-shaped nozzle; 565. First chamber; 566. Second chamber; 651. Hinge seat; 652. Swing shaft; 653. Counterweight ball; 654. Strike pin; 655. Fixing block; 5641. Jet nozzle; 5642. Guide plate; 5643. Airflow baffle. Detailed Implementation

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] The present invention will be further described below with reference to the accompanying drawings: like Figures 1-8 As shown, a conveying device for wheat flour production includes a U-shaped trough 1 and multiple shafted rotary blades 3. The shafted rotary blades 3 are typically 2-3 meters long per section, depending on the conveying distance, and are connected via hanging bearings. A drive module 2, a motor with a reducer, is located at one end of the U-shaped trough 1 and is connected to the shafted rotary blades 3 via a chain coupling. A cover plate 4 is fixed above the U-shaped trough 1, sealing the upper surface to prevent powder overflow during conveying. The feed end is connected to the cover plate 4 and has a feed inlet, while the discharge outlet is located below the other end of the U-shaped trough 1. The device also includes a central hanging bearing module 5, which is fixed within the U-shaped trough 1 to support and connect the shafted rotary blades 3. The central hanging bearing module 5 includes a bearing seat 52 with air holes. Existing basic central hanging bearings include a bearing seat casting, a bearing, and a bearing cover; this design adds a reversing air jet module at the central hanging bearing.

[0024] The reversing jet module is assembled within the central bearing module 5. In this design, the reversing jet module is a sub-assembly of the entire central bearing module 5. The reversing air blowing module includes airflow baffles 55 fixed on both sides of the bearing housing 52 and a pneumatic feeding assembly 56 that rotates with the shafted vane 3. The airflow baffles 55 are fixed to the bearing housing 52, and the mating ends of the airflow baffles 55 and the bearing housing 52 are provided with boss structures adapted to the bearing mounting holes. The airflow baffles 55 on both sides of the bearing housing 52 are fixed to the bearing housing 52 by internal hex bolts, thus centering and limiting the bearing 53. The central bearing module 5 also includes a bearing 53 embedded in the bearing housing 52, a connecting shaft 54 ​​for connecting the shafted vane 3, and a hanging mounting plate 51 for fixing the bearing housing 52. The connecting shaft 54 ​​is installed in the bearing 53 together with the inner ring of the bearing. The airflow baffles 55 and the connecting shaft 54 ​​are clearance-fitted in the central area, and the pneumatic feeding assembly 56 is spline-fitted with the connecting shaft 54 ​​and rotates synchronously with the connecting shaft 54. The airflow baffle 55 has airflow channels with opposite directions, and the pneumatic feeding assembly 56 has a nozzle with adjustable direction. The nozzle and the airflow channel are a cooperating mechanism. By changing the high-pressure airflow supply in different airflow channels, the jet direction of the adjustable nozzle inside the pneumatic feeding assembly 56 is changed to assist in pushing and clearing the material.

[0025] The air supply system is connected to the air vents in the bearing housing 52 via an air passage. This system is a high-pressure air supply system, connected to the equipment via a gas pipeline and equipped with a main valve. The main valve then connects to the air passages in the bearing housing 52. The reversing control valve is a solenoid valve located between the main valve and the bearing housing 52, controlling the airflow supply in different channels to control the jet direction of the pneumatic feeding assembly 56. Specifically, when compressed air flows into the forward airflow channel of the airflow baffle 55 through the bearing housing 52, the pneumatic feeding assemblies 56 on both sides of the bearing housing 52 simultaneously generate airflow thrust along the spiral axis and in the same axial direction. When the reversing control valve switches the airflow direction, the reverse airflow channels of the airflow baffle 55 on both sides of the bearing housing 52 are vented, and the pneumatic feeding assembly 56 subsequently provides reverse airflow thrust, achieving alternating forward and reverse blowing. The airflow baffles 55 on both sides of the bearing housing 52 have the same main structure as the pneumatic feeding assembly 56, but the arrangement of the airflow channels and the opening position of the nozzles are adapted to make the two sides of the bearing housing 52 synchronized when controlling the jet direction. During normal material conveying, the pneumatic feeding assemblies 56 on both sides spray jets along the axial direction and towards the discharge end, forming a multi-point swirling air curtain in the middle hanger bearing area that rotates with the shaft blade 3, thereby providing the material with downward flow thrust. When material blockage or poor material flow occurs, the jet direction is changed alternately to loosen the material and prevent it from continuing to accumulate and compact, thus avoiding material blockage.

[0026] As one embodiment of the present invention, such as Figure 3 and Figure 4As shown; the bearing housing 52 has an oil injection hole 523 for bearing lubrication, and a first air intake channel 521 and a second air intake channel 522 are respectively opened on both sides of the oil injection hole 523. A transverse through hole is opened at the bottom of the first air intake channel 521 and the second air intake channel 522, as shown. Figure 4 As shown, the through holes are perpendicular to the first intake channel 521 and the second intake channel 522, respectively, and the two are internally connected. The through holes allow the first intake channel 521 and the second intake channel 522 to simultaneously connect to the airflow baffles 55 at both ends of the bearing housing 52. The first intake channel 521 and the second intake channel 522 are respectively connected to the air source system.

[0027] As one embodiment of the present invention, such as Figures 3-4 As shown, the airflow baffle 55 includes a baffle body 551 fixed to both ends of the bearing housing 52. An inner ring air inlet groove 552 and an outer ring air inlet groove 553 are provided on the end face of the baffle body 551 away from the bearing housing 52. The inner ring air inlet groove 552 communicates with the first air inlet channel 521, and the outer ring air inlet groove 553 communicates with the second air inlet channel 522. The inner ring air inlet groove 552 and the outer ring air inlet groove 553 on both sides of the bearing housing 52 communicate with the first air inlet channel 521 and the second air inlet channel 522, respectively.

[0028] In actual operation, when high-pressure airflow is introduced into the outer ring air inlet groove 553 and the inner ring air inlet groove 552, it flows to the end through the air inlet hole connected to the bearing seat 52.

[0029] As one embodiment of the present invention, such as Figures 4-6 As shown, the pneumatic feeding assembly 56 includes an annular plate 561 disposed between the rotating blade 3 and the airflow baffle 55. The center of the annular plate 561 is limited by a spline engagement with the connecting shaft 54. Multiple fan-shaped grooves 562 are circumferentially formed on one end of the annular plate 561 near the airflow baffle 55. A notch is provided in the middle of the outer arc surface of each fan-shaped groove 562. A fan-shaped nozzle 564 fits within each fan-shaped groove 562. One end of the fan-shaped nozzle 564 near the fan-shaped groove 562 is open, and the other end is closed. The closed side of the fan-shaped nozzle 564 is in contact with the airflow baffle 55. A limiting shaft 563 is provided between the fan-shaped nozzle 564 and the fan-shaped groove 562. The fan-shaped nozzle 564 has a countersunk hole. One end of the limiting shaft 563 engages with the countersunk hole, and the other end passes through the annular plate 561 and is limited by bolts. The fan-shaped nozzle 564 and the limiting shaft 563 are rotatably engaged. The fan-shaped air nozzle 564 has a second chamber 566 and a first chamber 565 respectively corresponding to the inner ring air inlet groove 552 and the outer ring air inlet groove 553. The inside of the fan-shaped air nozzle 564 is equally divided into the second chamber 566 and the first chamber 565, and both are connected to the outer ring air inlet groove 553 and the inner ring air inlet groove 552 respectively. The outer walls of the first chamber 565 and the second chamber 566 are provided with vent holes that connect to the internal space of the fan-shaped groove 562.

[0030] As one embodiment of the present invention, such as Figures 5-6 As shown, the fan-shaped nozzle 564 includes an airflow baffle 5643 welded and fixed in the second chamber 566 and the first chamber 565. When airflow enters the first chamber 565 or the second chamber 566, the fan-shaped nozzle 564 is deflected by the reaction force due to the obstruction of the airflow baffle 5643, and remains stable under the action of continuous airflow. The first chamber 565 and the second chamber 566 have jet nozzles 5641 with opposite inclination directions. The two jet nozzles 5641 on the fan-shaped nozzle 564 are mating with the openings of the fan-shaped groove 562. A guide plate 5642 is fixedly welded inside the jet nozzle 5641. The guide plate 5642 has a wedge-shaped structure with a thicker outer side and a thinner inner side in the jet nozzle 5641, so that the airflow is blown out at the jet nozzle 5641 along the guiding direction of the guide plate 5642.

[0031] In operation, high-pressure airflow enters the airflow baffle 55 through the bearing housing 52. In normal mode, air enters through the first air intake channel 521, filling the inner ring air intake groove 552. As the pneumatic feeding assembly 56 rotates with the belt-driven vane 3, the airflow in the inner ring air intake groove 552 enters the second chamber 566, causing the fan-shaped nozzle 564 to rotate in the opposite direction of the airflow to its maximum displacement. At this time, the corresponding jet nozzle 5641 rotates to the opening of the fan-shaped nozzle 564, and the high-pressure airflow is ejected from the jet nozzle 5641. It is worth noting that although the fan-shaped nozzle 564 will pass through a section of arc-shaped air supply interruption position when it continues to rotate, the high-pressure airflow will continuously overflow through the fitting gap in actual use, thus having a limited impact on the overall effect. The fan-shaped nozzles 564 at both ends of the bearing housing 52 are as follows: Figure 2 As shown, the openings are in the same direction. When supplying air to the first air intake channel 521, a continuous air curtain is formed simultaneously, which pushes the material at the hanger bearing forward. When the blowing direction is changed, the air supply to the first air intake channel 521 is stopped, and air is supplied to the second air intake channel 522. The airflow enters the first chamber 565 through the outer ring air intake groove 553 in the airflow baffle 55. Similarly, it pushes the fan-shaped nozzle 564 to rotate in the opposite direction, so that the jet nozzle 5641 in the first chamber 565 matches the opening in the fan-shaped groove 562, and the second chamber 566 enters a closed state. The jet direction of the jet nozzle 5641 in the first chamber 565 is opposite to that in the second chamber 566, thus changing the jet direction. It is worth noting that during the deflection of the fan-shaped nozzle 564, there is always a gap between the fan-shaped nozzle 564 and the two side walls of the fan-shaped groove 562 that is simultaneously connected to the inner ring air intake groove 552 and the outer ring air intake groove 553. When the air supply channel is changed, the air in this area can be depressurized to the other channel through the vent hole, so that the deflection of the fan-shaped nozzle 564 can respond quickly. When material blockage occurs, the direction of air blowing from the fan-shaped air nozzle 564 is changed alternately by switching the air supply channels, thereby loosening and clearing the material at the hanger bearing.

[0032] As one embodiment of the present invention, such as Figure 2 , Figure 7 and Figure 8 As shown, it also includes a dust suppression mechanism 6, which is located on the unloading side of the central bearing module 5. This mechanism suppresses the flow of dust generated by the pneumatic feeding assembly 56. When the material at the bearing is moved by airflow assistance, the high-pressure airflow generates significant dust pollution. Therefore, a dust suppression mechanism 6 is needed downstream of the discharge point to prevent excessive dust from flowing out of the conveyor as smoke. The dust suppression mechanism 6 includes a dust suppression base plate 62, with a labyrinth baffle 64 fixed to its lower end face. The labyrinth baffle 64 consists of multiple staggered rectangular strips irregularly arranged on the lower end face of the dust suppression base plate 62 and welded to it. The bottom of the labyrinth baffle 64 engages with the shafted rotary blade 3, forming a sealing structure. The maze baffle 64 and the dust-suppressing base plate 62 are inverted and filled in the arched area between the rotating section of the shafted blade 3 and the cover plate 4. The dust-suppressing base plate 62 and the maze baffle 64 together form a complete U-shaped groove 1 section with the rotating section of the shafted blade 3. A plug-in plate 63 is fixed to the lower end face of the dust-suppressing base plate 62. The plug-in plate 63 is set on both sides of the lower end face of the dust-suppressing base plate 62 along the direction perpendicular to the U-shaped groove 1 for installing the dust-suppressing base plate 62. A limit slot 61 is fixed on the U-shaped groove 1 corresponding to the plug-in plate 63. The dust-suppressing base plate 62 is plugged into the U-shaped groove 1. After installation, the dust-suppressing base plate 62 is limited by the cover plate 4 and the limit slot 61, so that the dust-suppressing base plate 62 has a movement gap. A self-cleaning component 65 that cooperates with the shafted blade 3 is provided at the center of the dust-suppressing base plate 62.

[0033] As one embodiment of the present invention, such as Figure 2 , Figure 7 and Figure 8As shown, the self-cleaning component 65 includes a hinge seat 651 fixed at the center of the dust-suppressing base plate 62. The hinge seat 651 has a T-shaped structure, is inserted upside down into the center of the dust-suppressing base plate 62, and is fixed to the dust-suppressing base plate 62 by bolts. The center of the lower end face of the dust-suppressing base plate 62 does not have a labyrinth baffle 64. A swing shaft 652 is rotatably fitted on the hinge seat 651. A counterweight ball 653 is rotatably fitted at the lower end of the swing shaft 652. The top of the swing shaft 652 is hinged inside the hinge seat 651 and limited by a retaining spring. A rotating shaft is provided at the bottom, and the counterweight ball 653 is mounted on the rotating shaft, allowing it to rotate freely around the swing shaft 652. The counterweight ball 653 and the rotating blade 3 form a cooperating mechanism. During the feeding process, as the rotating blade 3 rotates to its highest point, it contacts the counterweight ball 653, pushing it and the swing shaft 652 downwards. After a certain distance, the counterweight ball 653 disengages from the rotating blade 3 and resets under gravity. It oscillates periodically during continuous feeding. A striking pin 654 is fixed to the swing shaft 652, and a fixing block 655, which cooperates with the striking pin 654, is fixed to the lower end face of the dust suppression plate 62. The fixing block 655 is integrally fixed to the dust suppression plate 62. When the counterweight ball 653 and the swing shaft 652 oscillate periodically, the striking pin 654 strikes the fixing block 655, causing the entire dust suppression plate 62 to vibrate periodically, thereby shaking off the material adhering to the labyrinth baffle 64 and keeping the labyrinth baffle 64 clean.

[0034] During operation, the high-pressure gas ejected from the fan-shaped nozzle 564 propels the material at the hanger bearing downwards. In this process, a large number of particles are rapidly blown up, forming dust containing a significant amount of particulate matter. This dust is blocked above the rotating blade 3 by the dust suppression plate 62 and the labyrinth baffle 64, using a partially sealed approach. The multi-layered labyrinth baffles gradually reduce the kinetic energy of the particles in the dust, causing it to settle and fall back into the conveying area of ​​the rotating blade 3 below. Simultaneously, the rotating blade 3 drives the self-cleaning component 65 to continuously vibrate and self-clean, preventing material from gradually adsorbing onto the surface of the labyrinth baffle 64 and causing blockages.

[0035] As one embodiment of the present invention, such as Figures 1-8 As shown; it also includes a buffer gas tank, which is respectively located between the reversing control valve and the first intake channel 521 and the second intake channel 522.

[0036] In actual operation, when the fan-shaped air nozzle 564 rotates to switch directions, there should always be high-pressure gas leaking out in its rotation gap to prevent powder backflow. This is especially true for the air jet 5641. Therefore, by setting up a buffer air tank, when the reversing control valve switches the air supply path, the high-pressure gas in the buffer air tank will continue to provide high-pressure gas for a period of time, thereby filling the transition time when the airflow switches, and ensuring that there is still high-pressure airflow flowing out along the mating gap when the fan-shaped air nozzle 564 rotates.

[0037] As shown in the figure, one embodiment of the present invention also includes a current monitoring module and a controller. The current monitoring module and the controller are conventional configurations such as a PLC and sensors. The current monitoring module collects the current signal of the motor in the drive module 2 in real time. When material blockage occurs, the motor load increases, and the current increases accordingly. The controller determines the material blockage status based on the motor current signal and controls the reversing control valve to switch the corresponding working mode. Normal mode: When the current is below the threshold, continuous positive air blowing is performed; pneumatic material pushing is used to fill the thrust gap at the hanger bearing.

[0038] Unblocking mode: When the current is higher than the threshold, air is blown alternately in both directions to loosen the material and prevent it from caking and clogging at the hanger bearing.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A conveying device for wheat flour production, comprising a U-shaped trough (1) and multiple shafted rotary blades (3), wherein a drive module (2) is provided at one end of the U-shaped trough (1), and a cover plate (4) is fixed above the U-shaped trough (1), characterized in that, Also includes: The middle hanger bearing module (5) is fixed in the U-shaped groove (1) to support the connecting shaft blade (3). The middle hanger bearing module (5) includes a bearing seat (52) with an air hole. The reversing jet module is assembled in the middle hanging bearing module (5). The reversing air blowing module includes airflow baffles (55) fixed on both sides of the bearing seat (52) and a pneumatic feeding assembly (56) that rotates with the belt shaft blade (3). The airflow baffles (55) are provided with airflow channels in opposite directions. The pneumatic feeding assembly (56) is provided with nozzles with adjustable direction. The nozzles and airflow channels are a matching mechanism. The air supply system is connected to the air hole provided in the bearing housing (52) through the air passage; A reversing control valve, located in the air circuit, controls the direction of airflow. When compressed air flows into the forward airflow channel of the airflow baffle (55) through the bearing housing (52), the pneumatic feeding assemblies (56) on both sides of the bearing housing (52) simultaneously generate airflow thrust along the spiral shaft and in the same axial direction. When the reversing control valve switches the airflow direction, the reverse airflow channel of the airflow baffle (55) on both sides of the bearing housing (52) is ventilated, and the pneumatic feeding assembly (56) provides reverse airflow thrust accordingly, realizing alternating forward and reverse blowing.

2. The conveying device for wheat flour production according to claim 1, characterized in that: The bearing housing (52) is provided with an oil injection hole (523) for bearing lubrication. A first air intake channel (521) and a second air intake channel (522) are provided on both sides of the oil injection hole (523). A transverse through hole is provided at the bottom of the first air intake channel (521) and the second air intake channel (522). The first air intake channel (521) and the second air intake channel (522) are respectively connected to the air source system.

3. The conveying device for wheat flour production according to claim 2, characterized in that: The airflow baffle (55) includes a baffle body (551) fixed at both ends of the bearing seat (52). The baffle body (551) has an inner ring air inlet groove (552) and an outer ring air inlet groove (553) on one end face away from the bearing seat (52). The inner ring air inlet groove (552) and the outer ring air inlet groove (553) on both sides of the bearing seat (52) are respectively connected to the first air inlet channel (521) and the second air inlet channel (522).

4. A conveying device for wheat flour production according to claim 3, characterized in that: The hanging bearing module (5) also includes a bearing (53) embedded in the bearing housing (52), a connecting shaft (54) for connecting the shafted vane (3), and a hanging mounting plate (51) for fixing the bearing housing (52). The airflow baffle (55) is fixed to the bearing housing (52) to limit the bearing (53).

5. A conveying device for wheat flour production according to claim 4, characterized in that: The pneumatic feeding assembly (56) includes an annular plate (561) disposed between the swivel blade (3) and the airflow baffle (55). The annular plate (561) is engaged and limited with the connecting shaft (54). Multiple fan-shaped grooves (562) are circumferentially opened at one end of the annular plate (561) near the airflow baffle (55). A notch is provided in the middle of the outer arc surface of the fan-shaped groove (562). A fan-shaped air nozzle (564) is fitted inside the fan-shaped groove (562). A limiting shaft (563) is provided between the fan-shaped air nozzle (564) and the fan-shaped groove (562). The fan-shaped air nozzle (564) is rotatably engaged with the limiting shaft (563). A second chamber (566) and a first chamber (565) are respectively opened inside the fan-shaped air nozzle (564) corresponding to the inner ring air inlet groove (552) and the outer ring air inlet groove (553).

6. A conveying device for wheat flour production according to claim 5, characterized in that: The fan-shaped nozzle (564) includes an airflow baffle (5643) welded and fixed in the second chamber (566) and the first chamber (565). The first chamber (565) and the second chamber (566) have jet nozzles (5641) with opposite inclination directions. A guide plate (5642) is fixedly welded inside the jet nozzle (5641).

7. A conveying device for wheat flour production according to claim 6, characterized in that: It also includes a dust suppression mechanism (6), which is located on the unloading side of the central bearing module (5) to suppress the flow of dust generated by the pneumatic feeding assembly (56). The dust suppression mechanism (6) includes a dust suppression base plate (62), a labyrinth baffle (64) is fixed on the lower end face of the dust suppression base plate (62), the bottom of the labyrinth baffle (64) fits with the shafted rotary blade (3) to form a sealing structure, a plug-in plate (63) is fixed on the lower end face of the dust suppression base plate (62), and a limit slot (61) is fixed on the U-shaped groove (1) corresponding to the plug-in plate (63). The dust suppression base plate (62) and the U-shaped groove (1) are plugged in and matched. A self-cleaning component (65) that matches the shafted rotary blade (3) is provided at the center of the dust suppression base plate (62).

8. A conveying device for wheat flour production according to claim 7, characterized in that: The self-cleaning component (65) includes a hinge seat (651) fixed at the center of the dust suppression base plate (62), a swing shaft (652) rotatably fitted on the hinge seat (651), a counterweight ball (653) rotatably fitted at the lower end of the swing shaft (652), a striker (654) fixed on the swing shaft (652), and a fixing block (655) fixed on the lower end face of the dust suppression base plate (62) as a cooperating mechanism with the striker (654).

9. A conveying device for wheat flour production according to claim 2, characterized in that: It also includes a buffer gas tank, which is located between the reversing control valve and the first intake channel (521) and the second intake channel (522).

10. A conveying device for wheat flour production according to claim 8, characterized in that: It also includes a current monitoring module and a controller. The current monitoring module collects the current signal of the motor in the drive module (2) in real time. The controller judges the blockage status based on the motor current signal and controls the reversing control valve to switch the corresponding working mode. Normal mode: When the current is below the threshold, it continues to blow air in the positive direction; Unblocking mode: When the current is higher than the threshold, air is blown alternately in both directions.

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