Positive-pressure flour conveying and supplying device for flour bin

Abstract

The invention relates to the technical field of bulk material conveying, and particularly discloses a flour bin positive pressure powder conveying and supplying device which comprises a feeding device and a conveying pipeline connected with the feeding device, a dredging mechanism is arranged at a bent pipe of the conveying pipeline, the bent pipe comprises a transverse pipe and a vertical pipe which are communicated, and the dredging mechanism comprises a guide part, a driving part, a dredging rod and a driving assembly. The guiding piece is cylindrical, the upper end of the guiding piece is hinged to the turning position of the bent pipe, the driving piece drives the guiding piece to rotate around the upper end of the guiding piece, and an annular guiding groove is formed in the guiding piece. The side facing material conveying serves as the front side, the dredging rod is arranged in the transverse pipe, the front end of the dredging rod is in sliding fit with the guide groove, the rear end of the dredging rod is connected with the driving assembly, the driving assembly drives the dredging rod to rotate in the mode of being attached to the inner wall of the transverse pipe, and the length of the dredging rod is matched with the distance change of the guide groove and the driving assembly. According to the powder supply device, when the bent pipe of the conveying pipeline is blocked, materials blocking the bent pipe can be dredged in time.

Description

Technical Field

[0001] The invention relates to the technical field of bulk material conveying, and in particular to a flour silo positive pressure conveying and feeding device. Background Art

[0002] Pneumatic conveying equipment uses the energy of air flow to transport powdered or granular materials. It is widely used in flour mills, food processing plants and other industries. When using pneumatic conveying equipment to transport flour, the flour collides with the inner wall of the pipeline at the bend of the conveying pipeline, which will lose some kinetic energy, causing flour to accumulate at the bend of the pipeline and cause pipeline blockage, affecting the normal transportation of flour.

[0003] The patent document with the authorization publication number CN116573421B discloses a pneumatic conveying equipment, including a discharge barrel, a first conveying pipe, a drying chamber and a second conveying pipe, the bottom of the discharge barrel is connected to the discharge regulating chamber, an adjusting roller is provided inside the discharge regulating chamber, the shaft of the adjusting roller is rotatably connected to the inner wall of the discharge regulating chamber, the adjusting roller is installed with the dividing plate, the dividing plates are arranged in a circular array along the center of the adjusting roller, the end of the dividing plate is installed with a cross bar, the end ball is rollingly connected to the cross bar, the bottom of the discharge regulating chamber is connected to the top of the discharge pipe, the bottom end of the discharge pipe is connected to The first conveying pipeline is connected, the unloading pipeline is perpendicular to the first conveying pipeline, one end of the first conveying pipeline is connected to the Roots blower, the other end of the first conveying pipeline is connected to the drying bin, and the other end of the drying bin is connected to the second conveying pipeline. A choke valve is installed at the connection between the second conveying pipeline and the drying bin, and the second conveying pipeline is composed of multiple groups of straight pipe sections and bend sections that are connected to each other. The bend section is provided with an insulation sleeve, and an electric heating wire is installed at the connection between the insulation sleeve and the bend section. A silicone rubber elastomer is installed on the inner wall of the bend section, and the silicone rubber elastomer is distributed on the side with a larger bending radius of the bend section.

[0004] The pneumatic equipment provided in the aforementioned patent document has a silicone elastomer installed on the inner wall of the curved pipe section. After colliding with the material, the silicone elastomer uses its own elasticity to eject the material, reducing the material's kinetic energy loss. At the same time, when the curved pipe section is blocked, the pipe is heated to expand the inner diameter of the pipe, increasing the flow space for the material. The silicone rubber elastomer expands due to heat, squeezing the material and destroying the stable structure of the accumulated material, which helps to clear the pipe. However, the expansion coefficient of silicone is relatively small. If the material is seriously accumulated, it is difficult to ensure that the expansion of the silicone will destroy the stable structure formed by the accumulated material. Continuing to transport the material into the conveying pipe at this time will cause the internal pressure of the pipe to increase, and the possibility of pipe blockage will increase. Summary of the Invention

[0005] The present invention provides a flour silo positive pressure conveying and feeding device, which aims to solve the problem in the related art that when flour is conveyed by pneumatic equipment, flour is easily accumulated at the bends of the pipeline and causes blockage at the bends of the pipeline, thereby affecting the normal conveying function of the pipeline.

[0006] A positive pressure conveying and powder feeding device for a flour silo of the present invention comprises a feeding device and a conveying pipe connected to the feeding device, a dredging mechanism is provided at the bend of the conveying pipe, the bend comprises a connected horizontal pipe and a vertical pipe, the dredging mechanism comprises a guide, a driving member, a dredging rod and a driving assembly, the guide member is cylindrical, the upper end of the guide member is hinged to the bend of the bend, the driving member drives the guide member to rotate around the bend between it and the bend, and an annular guide groove is provided on the guide member; with the side facing the material conveying as the front side, the dredging rod is arranged in the horizontal pipe, the front end of the dredging rod is slidably matched with the guide groove, the rear end of the dredging rod is connected to the driving assembly, and the driving assembly drives the dredging rod to rotate in accordance with the inner wall of the horizontal pipe, and the length of the dredging rod adapts to the distance change between the guide groove and the driving assembly.

[0007] The beneficial effects are as follows: ensuring the normal operation of the flour feeding device and avoiding blockage at the bend in the process of flour conveying. The bend of the conveying pipeline is a key position where materials are easily accumulated and blocked. By setting a dredging mechanism, especially the cooperation of the guide member, the driving member, the dredging rod and the driving assembly, the blocked material can be dredged in time when blockage occurs at the bend. When the driving assembly is working, it drives the dredging rod to rotate inside the horizontal pipe and at the connection between the horizontal pipe and the vertical pipe, thereby promoting the flow of blocked materials and redirecting the accumulated flour into the normal conveying process, avoiding uneven flow of flour after local accumulation, and helping to ensure that the flour maintains a uniform flow rate during the entire conveying process, thereby improving the quality stability of subsequent production links. In addition, the dredging mechanism cleans the flour in the pipeline in time, which can avoid the situation where flour is retained, deteriorated or wasted in the pipeline due to blockage, saving material costs and reducing material losses that may occur during the cleaning process. In addition, the entire dredging device is controlled by a drive component and does not require human intervention, which greatly reduces the workload and labor intensity of manual pipe cleaning and reduces the company's labor costs. The dredging mechanism is closely integrated with the feeding device and the conveying pipeline to form a complete automated conveying system. This integrated design not only improves the overall performance of the system, but also facilitates centralized monitoring and management by operators, further improving the automation level of the production process.

[0008] Preferably, a receiving groove parallel to the axis of the transverse tube is provided on the lower side of the inner wall of the transverse tube, and the dredging rod slides with the accommodating groove in the vertical direction. A blocking rod is also provided in the accommodating groove for vertical sliding. The upper end face of the blocking rod is an arc surface that is adapted to the inner wall of the transverse tube, and the dredging rod slides unidirectionally in contact with the upper end face of the blocking rod.

[0009] The beneficial effects are: the receiving groove is used to store the dredging rod under normal conveying conditions, to prevent the dredging rod from affecting the conveying of flour in the horizontal tube when the flour is conveyed normally. The design of the blocking rod can play a temporary blocking role during the dredging process. When the dredging rod moves to a certain position, the blocking rod can temporarily close the receiving groove to prevent flour from entering the receiving groove and affecting the subsequent resetting of the dredging rod.

[0010] Preferably, the upper end of the blocking rod is elastically connected to a limiting block, the dredging rod is provided with a limiting groove movably opposite to the limiting block, one side of the limiting block is a vertical surface, and the thickness of the limiting block decreases from bottom to top.

[0011] The beneficial effects are: it is convenient for the dredging rod to automatically reset after completing the dredging operation. The dredging rod and the blocking rod are matched with the limit block and the limit groove through one-way sliding. That is, when the dredging rod rotates in the horizontal pipe in one direction, the inclined end of the limit block is squeezed and the limit block will not block the rotation of the dredging rod in that direction. When the dredging rod rotates in the horizontal pipe in another direction, the vertical surface of the limit block blocks the rotation of the dredging rod in that direction. The dredging rod and the blocking rod are relatively fixed, and the dredging rod is relative to the accommodating groove again. After the blocking rod moves down, the dredging rod can be put back into the accommodating groove, further ensuring the automation of the overall operation of the dredging mechanism.

[0012] Preferably, the front end of the dredging rod is rotatably connected to connecting rod one through a torsion spring, and the connecting rod one slides in cooperation with the guide groove. The rear end of the dredging rod is rotatably connected to connecting rod two, and the connecting rod two is rotatably connected to the driving assembly through a torsion spring. When the blocking rod pushes the dredging rod to move upward and out of the accommodating groove, the torsion spring connected to connecting rod one and connecting rod two accumulates force.

[0013] The beneficial effects are: the front end of the dredge rod is connected to the connecting rod one through a torsion spring, the connecting rod one slides with the guide groove, the rear end of the dredge rod is connected to the connecting rod two through a torsion spring, and the connecting rod two is rotatably connected to the driving assembly. This design allows the dredge rod to flexibly adjust the position and angle of the front end according to the direction of the guide groove during movement. The flexibility of the connecting rod one allows the front end of the dredge rod to fit more closely to the inner wall of the pipe, especially at the bend of the pipe or in areas with thick material accumulation, which can more effectively remove flour accumulation. In addition, the design of the connecting rod one and the connecting rod two can also make the dredge rod move smoothly under the action of the driving assembly. At the same time, the torsion spring can absorb certain vibrations and impacts to ensure that the movement of the dredge rod is smoother.

[0014] Preferably, the driving assembly includes a rotating ring gear, a driving gear and a driving source, the driving source is installed on the outside of the transverse tube, the driving end of the driving source is connected to the driving gear, the rotating ring gear is located on the inside of the transverse tube, the inner wall of the rotating ring gear is flush with the inner wall of the transverse tube, the rotating ring gear rotates in conjunction with the transverse tube, and the dredging rod is connected to the rotating ring gear.

[0015] The beneficial effects are: ensuring the stability of the driving component driving the dredging rod to rotate in the horizontal pipe, the driving source engages with the rotating ring gear through the driving gear, and transmits power to the rotating ring gear, and the rotating ring gear then drives the dredging rod to move. This driving gear transmission method can accurately control the movement speed and direction of the dredging rod, ensuring that the dredging rod moves smoothly and evenly in the pipeline, avoiding poor dredging effect or component damage due to uneven power transmission.

[0016] Preferably, the dredging rod includes a connecting rod and a movable rod, the connecting rod is hollow, the movable rod is in sliding cooperation with the connecting rod, and the movable rod is in sliding cooperation with the guide groove.

[0017] The beneficial effects are: the retractable dredging rod design can reduce the risk of the dredging rod getting stuck due to the uneven inner wall of the pipe or material accumulation during movement. The movable rod can slide in the connecting rod to automatically adjust its position to avoid damage caused by rigid collision.

[0018] Preferably, with the side facing the axis of the transverse tube as the inner side, a plurality of paddles are provided on the inner side of the movable rod, each of the paddles is arranged at intervals along the length direction of the movable rod, and the paddles are rotatably connected to the movable rod through a torsion spring.

[0019] The beneficial effects are: further improving the dredging effect of flour, when the dredging rod rotates in the horizontal tube, the paddle rotates with the dredging rod and promotes the dispersion of the accumulated materials, thereby improving the dredging effect of the materials, and in the process of the material rotating from top to bottom, the movable rod slides out of the connecting rod, and the paddle also has a tendency to move forward along the axis of the horizontal tube. When the paddle moves forward, it can assist in pushing the material in the horizontal tube forward.

[0020] Preferably, with the side facing the axis of the transverse tube as the inner side, a plurality of protrusions are provided on the outer side of the movable rod at intervals along its own length direction, and each of the protrusions is elastically connected to the movable rod along the radial direction of the transverse tube.

[0021] The beneficial effect is that when the movable rod slides out relative to the connecting rod, the protrusion pops out and hits the horizontal pipe, thereby increasing the kinetic energy of the material in the horizontal pipe and further promoting the unblocking of the material in the horizontal pipe.

[0022] Preferably, an extension tube is further provided on the lower side of the vertical tube, and a movable part is provided in the extension tube. The movable part slides along the inner wall of the extension tube in the vertical direction, the lower end of the movable part is connected to the extension tube through a cylinder, and the guide part is movably abutted against the upper end surface of the movable part.

[0023] The beneficial effects are: the design of the extension tube and the movable part effectively increases the internal space of the elbow, promotes the unblocking of materials in the elbow, and when the material is blocked in the elbow, the guide part is driven to rotate in the elbow through the driving part. When the driving part rotates toward the front side, it presses the movable part downward, and the overall space inside the elbow is increased.

[0024] Preferably, a cleaning port is provided on the side wall of the extension tube.

[0025] The beneficial effect is: the cleaning port is used to facilitate the staff to clean the material remaining at the bend after the material is conveyed. After the material is conveyed, the movable part moves to the lower side of the cleaning port, and the material remaining inside the bend falls on the upper side of the movable part. The cleaning port can be opened to clean the material on the upper side of the movable part, avoiding the material from remaining and deteriorating at the bend, affecting the subsequent material conveying quality.

[0026] The beneficial effects of the present invention are: (1) Ensure the normal operation of the powder feeding device and avoid blockage at the bend during flour transportation. The bend of the conveying pipeline is a key position where materials are easily accumulated and blocked. By setting up a dredging mechanism, especially the cooperation of the guide, drive, dredging rod and drive assembly, the blocked material can be dredged in time when blockage occurs at the bend. When the drive assembly is working, it drives the dredging rod to rotate inside the horizontal pipe and at the connection between the horizontal pipe and the vertical pipe, promoting the flow of blocked materials and redirecting the accumulated flour into the normal conveying process, avoiding uneven flow of flour after local accumulation, and helping to ensure that the flour maintains a uniform flow rate during the entire conveying process, thereby improving subsequent production. The quality stability of the production process is improved, and the dredging mechanism cleans the flour in the pipeline in time, which can avoid the flour from being retained, deteriorating or wasted in the pipeline due to blockage, saving material costs and reducing the possible material loss during the cleaning process; in addition, the entire dredging device is controlled by the drive component and does not require manual intervention, which greatly reduces the workload and labor intensity of manual pipeline cleaning and reduces the company's labor costs. The dredging mechanism is closely integrated with the feeding device and the conveying pipeline to form a complete automated conveying system. This integrated design not only improves the overall performance of the system, but also facilitates centralized monitoring and management by operators, further improving the automation level of the production process.

[0027] (2) The receiving groove is used to store the dredging rod under normal conveying conditions to prevent the dredging rod from affecting the conveying of flour in the transverse tube when the flour is normally conveyed. The design of the blocking rod can play a temporary blocking role during the dredging process. When the dredging rod moves to a certain position, the blocking rod can temporarily close the receiving groove to prevent flour from entering the receiving groove. The dredging rod and the blocking rod are matched with each other through the one-way sliding of the limit block and the limit groove, that is, when the dredging rod rotates in one direction in the transverse tube, the inclined end of the limit block is squeezed and the limit block does not block the rotation of the dredging rod in this direction. When the dredging rod rotates in the transverse tube in another direction, the vertical surface of the limit block blocks the rotation of the dredging rod in this direction. The dredging rod and the blocking rod are relatively fixed, and the dredging rod is relative to the receiving groove again. After the blocking rod moves down, the dredging rod can be re-entered into the receiving groove, further ensuring the automation of the overall operation of the dredging mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is the front view of the present invention.

[0029] Figure 2 This is a state diagram of the dredging mechanism of the present invention when dredging materials in the elbow.

[0030] Figure 3 yes Figure 2 main view.

[0031] Figure 4 This is another state diagram of the dredging mechanism in the present invention when dredging materials in the elbow.

[0032] Figure 5 yes Figure 4 main view.

[0033] Figure 6 It is a structural schematic diagram of the connection between the dredging rod, the rotating gear ring and the guide member in the present invention.

[0034] Figure 7 It is a structural schematic diagram of the connection between the dredging rod and the connecting rod 1 and the connecting rod 2 in the present invention.

[0035] Reference numerals: 1. Feeding device; 11. Conveying pipeline; 12. Bend pipe; 121. Horizontal pipe; 122. Vertical pipe; 123. Accommodating groove; 13. Extension pipe; 131. Cleaning port; 14. Movable part; 2. Guide member; 21. Guide groove; 22. Connecting shaft; 3. Driving source; 31. Driving gear; 32. Rotating ring gear; 4. Clearing rod; 41. Connecting rod; 411. Limiting groove; 42. Movable rod; 421. Paddle; 422. Bump; 43. Blocking rod; 431. Limiting block; 44. Connecting rod 1; 45. Connecting rod 2. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0037] like Figures 1 to 5 As shown, the flour silo positive pressure conveying and feeding device of the present invention includes a feeding device 1, a fan and a conveying pipe 11. The feeding device 1 is used to quantitatively feed materials into the conveying pipe 11, wherein the feeding device 1 includes but is not limited to a screw feeder and a vibrating feeder. The fan is used to provide airflow, and the fan includes but is not limited to a centrifugal fan and a Roots blower. The conveying pipe 11 connects the feeding device 1 and the receiving end. The conveying pipe 11 includes a horizontally arranged transverse pipe 121 and a vertically arranged vertical pipe 122. The connection between the horizontal pipe 121 and the vertical pipe 122 forms a bend pipe 12. In this embodiment, the material is conveyed from the horizontal pipe 121 to the vertical pipe 122. In order to avoid the material from being blocked at the bend pipe 12 of the conveying pipe 11, a dredging mechanism is provided at the bend pipe 12 of the conveying pipe 11. The dredging mechanism is used to dredge the material at the bend pipe 12 when the bend pipe 12 is blocked.

[0038] The dredging mechanism includes a guide member 2, a driving member, a dredging rod 4 and a driving assembly. The guide member 2 is cylindrical, with the side facing the material conveying as the front side. The guide member 2 is located at the front end of the transverse tube 121. In the initial state, the axis of the guide member 2 coincides with the transverse tube 121. Figure 2 and Figure 4 As shown, the upper end of the guide member 2 is hinged to the bend of the elbow 12, and the guide member 2 is connected to a driving member. Specifically, the driving member can be a motor. The concave side of the elbow 12 is rotatably connected to a connecting shaft 22. The upper end of the guide member 2 is fixed to the connecting shaft 22. The driving member is installed on the outside of the elbow 12, and the driving end of the driving member is fixed to the connecting shaft 22. When the driving member is in operation, it drives the connecting shaft 22 to rotate and drives the guide member 2 to rotate around the connecting shaft 22. An annular guide groove 21 is provided on the rear side of the guide member 2, and the axis of the guide groove 21 coincides with the axis of the guide member 2.

[0039] like Figures 2 to 6As shown, the dredging rod 4 is arranged in the transverse tube 121, the front end of the dredging rod 4 slides with the guide groove 21, and the rear end of the dredging rod 4 is connected to the driving assembly. The driving assembly drives the conveying cylinder to rotate in accordance with the inner wall of the transverse tube 121. The driving assembly includes a driving source 3, a driving gear 31 and a rotating ring gear 32. The driving source 3 can be a motor. The driving source 3 is installed on the outside of the transverse tube 121. The driving end of the driving source 3 is connected to the driving gear 31, and the rotating ring gear 32 is located on the inside of the transverse tube 121. An annular groove for installing the rotating ring gear 32 is provided on the inside of the transverse tube 121. The rotating ring gear 32 is rotatably installed in the annular groove, and the inner wall of the rotating ring gear 32 is flush with the inner wall of the transverse tube 121. The side wall of the transverse tube 121 is provided with a notch, and the driving gear 31 meshes with the rotating ring gear 32 at the notch of the transverse tube 121. When the driving source 3 is working, it drives the driving gear 31 to rotate, and when the driving gear 31 rotates, it drives the rotating ring gear 32 to rotate.

[0040] like Figure 6 and Figure 7 As shown, the rear end of the dredging rod 4 is connected to the rotating ring gear 32 via a second connecting rod 45, one end of the second connecting rod 45 is hinged to the rear end of the dredging rod 4, and the other end of the second connecting rod 45 is rotatably connected to the rotating ring gear 32 via a torsion spring. The front end of the dredging rod 4 is slidably connected to the guide groove 21 via a first connecting rod 44, one end of the first connecting rod 44 is slidably connected to the guide groove 21, and the other end of the first connecting rod 44 is rotatably connected to the front end of the dredging rod 4 via a torsion spring. The dredging rod 4 is a telescopic structure, and the length of the dredging rod 4 adapts to the change in the distance between the guide groove 21 and the drive assembly. Specifically, the dredging rod 4 includes a connecting rod 41 and a movable rod 42. The connecting rod 41 is hollow, and the movable rod 42 slides with the connecting rod 41, and the movable rod 42 slides with the guide groove 21.

[0041] A receiving groove 123 is provided on the lower side of the inner wall of the transverse tube 121. The receiving groove 123 is parallel to the axis of the transverse tube 121. The dredging rod 4 is movably accommodated within the receiving groove 123. The dredging rod 4 slides in the vertical direction with the receiving groove 123, that is, the dredging rod 4 slides in or out of the receiving groove 123 in the vertical direction. A blocking rod 43 is also provided in the receiving groove 123 for vertical sliding. The blocking rod 43 is used to block the receiving groove 123 after the dredging rod 4 slides out of the receiving groove 123 to prevent material from accumulating in the receiving groove 123 and affecting the dredging rod 4 from re-entering the receiving groove 123 after dredging the material. In the initial state, the guide member 2 is vertically arranged at the front end of the transverse tube 121 and is coaxial with the transverse tube 121. The dredging rod 4 is located in the receiving groove 123, the blocking rod 43 is located at the lower end of the dredging rod 4, and the upper end surface of the dredging rod 4 is an arc surface adapted to the inner wall of the transverse tube 121. The lower end of the blocking rod 43 is connected to a cylinder, which is used to push the blocking rod 43 to slide up and down in the accommodating groove 123.

[0042] like Figure 2As shown, an extension tube 13 is further provided on the lower side of the vertical tube 122, and a movable part 14 is provided in the extension tube 13. The movable part 14 slides in the vertical direction against the inner wall of the extension tube 13, and the lower end of the extension tube 13 is closed. The lower end of the movable part 14 is connected to the lower end of the extension tube 13 through a cylinder. The movable part 14 is elastically connected to the protruding end of the cylinder. The upper end of the movable part 14 is in an arc shape, and the guide part 2 is movably abutted against the upper end surface of the movable part 14. When the guide part 2 rotates in the bent tube 12, it squeezes the movable part 14 downward. A cleaning port 131 is also provided on the side wall of the extension tube 13. The cleaning port 131 is used to facilitate the staff to clean the residual materials at the elbow 12 after the material transportation is completed. After the material transportation is completed, the cylinder drives the movable part 14 to move to the lower side of the cleaning port 131, and the material in the elbow 12 falls on the upper side of the movable part 14. The cleaning port 131 can be opened to clean the material on the upper side of the movable part 14, so as to avoid the residual deterioration of the material at the elbow 12 and affect the subsequent material transportation quality.

[0043] When the material is blocked at the bend 12, the guide member 2 is driven by the driving member to rotate inside the bend 12. When the driving member rotates toward the front side, it presses the movable member 14 downward, thereby increasing the internal space of the bend 12 and promoting the unblocking of the material at the bend 12. At the same time, the blocking rod 43 is pushed upward by the cylinder, pushing the unblocking rod 4 to the outside of the receiving groove 123. When the unblocking rod 4 moves to the outside of the receiving groove 123, the torsion spring connected to the connecting rod 1 44 and the connecting rod 2 45 is in a force storage state. The driving source 3 of the driving assembly is started. When the driving source 3 is working, it drives the rotating ring gear 32 to rotate through the driving gear 31. The unblocking rod 4 rotates synchronously with the rotating ring gear 32. The unblocking rod 4 is in contact with the inner wall of the horizontal pipe 121 under the elastic force of the torsion spring. When the unblocking rod 4 rotates with the rotating ring gear 32, the material at the bottom of the horizontal pipe 121 and the vertical pipe 122 is stirred, thereby promoting the dispersion of the material.

[0044] like Figure 4 As shown, in order to ensure that the dredging rod 4 can be smoothly reset after the material at the bend 12 is dredged, the dredging rod 4 slides unidirectionally against the upper end surface of the blocking rod 43. Specifically, the upper end of the blocking rod 43 is elastically connected to the limiting block 431, and a groove is provided on the blocking rod 43. The limiting block 431 is connected to the groove through a spring. When the limiting block 431 is squeezed, it enters the groove. The dredging rod 4 is provided with a limiting groove 411 which is movable opposite to the limiting block 431. One side of the limiting block 431 is a vertical surface, and the other side of the limiting block 431 is an inclined surface. The thickness of the limiting block 431 decreases from bottom to top.

[0045] When the driving source 3 rotates forward, the dredging rod 4 rotates along the inner wall of the transverse tube 121, and contacts the inclined surface of the stop block 431 at intervals, squeezing the stop block 431 into the groove on the blocking rod 43. When the driving source 3 rotates forward, the stop block 431 will not block the dredging rod 4 from rotating in the transverse tube 121. When the material in the curved tube 12 is completely dredged, the driving source 3 rotates in the reverse direction, and the dredging rod 4 rotates along the inner wall of the transverse tube 121 until the stop groove 411 abuts the vertical surface of the stop block 431. The stop block 431 then blocks the dredging rod 4 from further rotation, and the dredging rod 4 and the receiving groove 123 are vertically opposite. Then, the driving source 3 is turned off and the guide member 2 is reset. The cylinder then drives the blocking rod 43 downward, and the dredging rod 4 re-enters the receiving groove 123 under the action of the torsion spring.

[0046] like Figures 2 to 6 As shown, in order to further improve the dredging effect of the dredging rod 4 on the material, a plurality of paddles 421 are further provided on the movable rod 42, with the side facing the axis of the horizontal tube 121 as the inner side, each paddle 421 is located on the inner side of the movable rod 42, and each paddle 421 is arranged at intervals along the length direction of the movable rod 42, and the paddle 421 is rotatably connected to the movable rod 42 through a torsion spring. When the movable rod 42 extends from the connecting rod 41, the paddle 421 is separated from the connecting rod 41 and rotates under the action of the torsion spring, and the movable rod 42 is retracted into the connecting rod. 41, the paddle 421 is squeezed and fits together with the movable rod 42 again. After the paddle 421 rotates relative to the movable rod 42, when the dredging rod 4 rotates in the horizontal tube 121, the paddle 421 rotates with the dredging rod 4 and promotes the dispersion of the accumulated materials, thereby improving the dredging effect of the materials. In the process of the material rotating from top to bottom, the movable rod 42 slides out of the connecting rod 41, and the paddle 421 also has a tendency to move forward along the axis of the horizontal tube 121. When the paddle 421 moves forward, it can assist in pushing the material in the horizontal tube 121 forward.

[0047] like Figure 6 and Figure 7 As shown, the outer side of the movable rod 42 is provided with a plurality of protrusions 422 spaced along its length. Each protrusion 422 is elastically connected to the movable rod 42 along the radial direction of the transverse tube 121. Specifically, the movable rod 42 is provided with a plurality of grooves, and each protrusion 422 is mounted in a corresponding groove via a spring. The end of the protrusion 422 away from the movable rod 42 is hemispherical. When the movable rod 42 slides relative to the connecting rod 41, the protrusion 422 pops out and strikes the transverse tube 121, increasing the kinetic energy of the material within the transverse tube 121 and further promoting the flow of the material within the transverse tube 121.

[0048] In order to further enhance the automation of the operation of the dredging mechanism in the conveying pipeline 11 and reduce manual intervention during the dredging process, a monitoring device may be provided in the conveying pipeline 11. The monitoring device may be a powder flow meter, which may be provided on the upper side of the elbow 12 and is used to monitor the powder flow in the conveying pipeline 11 in real time. The powder supply device further includes a control unit, to which the powder flow meter is connected and transmits monitoring signals to the control unit in real time. The control unit is also connected to the driving source 3, the motor, and the cylinders in the dredging mechanism and is used to control the opening and closing states of the driving source 3 and the motor and the extension and contraction states of the cylinders.

[0049] When blockage occurs at the bend 12, the powder flowmeter monitors that the powder flow in the conveying pipe 11 decreases and transmits the monitoring signal to the control unit. The control unit controls the operation of the driving source 3 and the motor. The motor drives the guide to rotate through the connecting shaft 22. The control unit controls the cylinder connected to the blocking rod 43 to extend and push the dredging rod 4 out of the receiving groove 123. When the driving source 3 is working, it drives the dredging rod 4 to rotate in the horizontal pipe 121 and dredge the material.

[0050] After the accumulated materials at the bend 12 are cleared, the control unit receives the signal from the split flow meter, controls the driving source 3 to rotate in the opposite direction, and controls the motor to rotate to drive the guide member 2 to reset. When the dredging rod 4 rotates to the upper side of the receiving groove 123, the dredging rod 4 is fixed relative to the blocking rod 43 in the circumferential direction of the transverse tube 121. The control center controls the cylinder connected to the blocking rod 43 to retract, driving the blocking rod 43 to move downward. Under the action of the torsion spring, the dredging rod 4 is reset into the receiving groove 123. After the powder feeding device stops running, the control center controls the cylinder connected to the movable part 14 to retract until the movable part 14 moves to the lower side of the cleaning port 131. The staff cleans the materials remaining on the upper side of the movable part 14 through the cleaning port 131. After the cleaning operation is completed, the control center controls the cylinder connected to the movable part 14 to extend, pushing the movable part 14 to its original position.

[0051] The flour silo positive pressure conveying powder feeding device provided by the present invention is provided with a dredging mechanism at the bend of the pipe, so that when the bend of the pipe is blocked, the blocked material can be dredged in time to ensure the normal operation of the powder feeding device.

[0052] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A flour silo positive pressure conveying and feeding device, comprising a feeding device (1) and a conveying pipe (11) connected to the feeding device (1), characterized in that: A dredging mechanism is provided at the bend (12) of the conveying pipeline (11), the bend (12) comprising a communicating horizontal pipe (121) and a vertical pipe (122), the dredging mechanism comprising a guide member (2), a driving member, a dredging rod (4) and a driving assembly, the guide member (2) being cylindrical, the upper end of the guide member (2) being hinged to the bend of the bend (12), the driving member driving the guide member (2) to rotate around the bend with the bend (12), and the guide member (2) ) is provided with an annular guide groove (21); with the side facing the material conveying as the front side, the dredging rod (4) is arranged in the transverse tube (121), the front end of the dredging rod (4) is slidably matched with the guide groove (21), and the rear end of the dredging rod (4) is connected to the driving component, and the driving component drives the dredging rod (4) to rotate in contact with the inner wall of the transverse tube (121), and the length of the dredging rod (4) is adapted to the distance change between the guide groove (21) and the driving component.

2. The flour silo positive pressure conveying and feeding device according to claim 1, characterized in that: A receiving groove (123) parallel to the axis of the transverse tube (121) is provided on the lower side of the inner wall of the transverse tube (121), and the dredging rod (4) is slidably matched with the receiving groove (123) in the vertical direction. A blocking rod (43) is also vertically slidably provided in the receiving groove (123), and the upper end surface of the blocking rod (43) is in the shape of an arc surface adapted to the inner wall of the transverse tube (121). The dredging rod (4) slides unidirectionally in contact with the upper end surface of the blocking rod (43).

3. The flour silo positive pressure conveying and feeding device according to claim 2, characterized in that: The upper end of the blocking rod (43) is elastically connected to a limiting block (431), and the dredging rod (4) is provided with a limiting groove (411) that is movably opposed to the limiting block (431). One side of the limiting block (431) is a vertical surface, and the thickness of the limiting block (431) decreases from bottom to top.

4. The flour silo positive pressure conveying and feeding device according to claim 2, characterized in that: The front end of the dredging rod (4) is rotatably connected to a connecting rod 1 (44) via a torsion spring, and the connecting rod 1 (44) is slidably engaged with the guide groove (21). The rear end of the dredging rod (4) is rotatably connected to a connecting rod 2 (45), and the connecting rod 2 (45) is rotatably connected to the driving assembly via a torsion spring. When the blocking rod (43) pushes the dredging rod (4) to move upward and out of the accommodating groove (123), the torsion spring connected to the connecting rod 1 (44) and the connecting rod 2 (45) stores force.

5. The flour silo positive pressure conveying and feeding device according to claim 1, characterized in that: The driving assembly comprises a rotating ring gear (32), a driving gear (31) and a driving source (3), wherein the driving source (3) is mounted on the outside of the transverse tube (121), a driving end of the driving source (3) is connected to the driving gear (31), the rotating ring gear (32) is located on the inside of the transverse tube (121), an inner wall of the rotating ring gear (32) is flush with an inner wall of the transverse tube (121), the rotating ring gear (32) is rotatably matched with the transverse tube (121), and the dredging rod (4) is connected to the rotating ring gear (32).

6. The flour silo positive pressure conveying and feeding device according to claim 1, characterized in that: The dredging rod (4) comprises a connecting rod (41) and a movable rod (42); the connecting rod (41) is hollow; the movable rod (42) is in sliding engagement with the connecting rod (41); and the movable rod (42) is in sliding engagement with the guide groove (21).

7. The flour silo positive pressure conveying and feeding device according to claim 6, characterized in that: With the side facing the axis of the transverse tube (121) as the inner side, a plurality of paddles (421) are provided on the inner side of the movable rod (42), and the paddles (421) are arranged at intervals along the length direction of the movable rod (42). The paddles (421) are rotatably connected to the movable rod (42) via a torsion spring.

8. The flour silo positive pressure conveying and feeding device according to claim 6, characterized in that: With the side facing the axis of the transverse tube (121) as the inner side, the outer side of the movable rod (42) is provided with a plurality of protrusions (422) at intervals along its own length direction, and each protrusion (422) is elastically connected to the movable rod (42) along the radial direction of the transverse tube (121).

9. The flour silo positive pressure conveying and feeding device according to claim 1, characterized in that: An extension tube (13) is further provided on the lower side of the vertical tube (122), and a movable part (14) is provided in the extension tube (13). The movable part (14) slides in a vertical direction against the inner wall of the extension tube (13), and the lower end of the movable part (14) is connected to the extension tube (13) via a cylinder, and the guide part (2) is in movable contact with the upper end surface of the movable part (14).

10. The flour silo positive pressure conveying and feeding device according to claim 9, characterized in that: A cleaning port (131) is provided on the side wall of the extension tube (13).

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