Calcium carbonate production line anti-blocking conveying equipment

Abstract

The present application relates to calcium carbonate conveying equipment technical field, disclose a kind of calcium carbonate production line anti-blocking conveying equipment, including installation bedplate, the top of the installation bedplate is fixedly installed spiral conveying cylinder, the outer wall of the spiral conveying cylinder is fixedly connected with driving motor, the output end of the driving motor is fixedly connected with spline shaft, the outer wall of the spline shaft is slidably equipped with spline sleeve, the outside of the spline sleeve is fixedly connected with driving shaft, the outer wall of the driving shaft is fixedly connected with spiral conveying blade.By driving motor driving driving shaft synchronous rotation, clear sticky scraper can be scraped in real time the damp agglomerate calcium carbonate powder adhered to the inner wall of spiral conveying cylinder, can reduce the long-term accumulation of powder and form wall sticking and blocking, while driving spiral conveying blade and clear sticky scraper whole axial small amplitude shift, can continue to disturb the powder in the cylinder compaction accumulation, scatter layered compacted material, effectively avoid the compaction arching and middle section jamming fault in calcium carbonate powder conveying process.

Description

Technical Field

[0001] This invention relates to the field of calcium carbonate conveying equipment technology, specifically to an anti-blocking conveying device for a calcium carbonate production line. Background Technology

[0002] Calcium carbonate, a mainstream inorganic filler powder in the plastics, rubber, coatings, and papermaking industries, is divided into two categories: light calcium carbonate and heavy calcium carbonate. Ultrafine calcium carbonate powder has particle sizes mostly in the micrometer range, with a large specific surface area. It is highly susceptible to moisture absorption during production workshop humidity fluctuations and storage and transportation, leading to particle agglomeration due to van der Waals forces. This results in extremely poor overall powder flowability. In continuous transfer stages of the production line, the industry commonly uses screw conveyors for closed-loop feeding. Compared to belt conveyors and pneumatic conveyors, screw conveyors offer advantages such as smaller footprint, better sealing, stable conveying capacity, and suitability for small and medium-sized production lines, making them an indispensable transfer and conveying device in calcium carbonate processing. Conventional screw conveyors consist of a cylinder, main conveyor shaft, screw blades, drive motor, and upper and lower hoppers. They rely on the motor to drive the screw blades to rotate and push the powder along the cylinder's axial direction. This unidirectional material conveying relies solely on a fixed structure and lacks a corresponding synchronous unblocking mechanism, leading to significant material blockage defects under long-term calcium carbonate powder conveying conditions.

[0003] The existing conventional modification methods for addressing material blockage in screw conveyors in the industry mainly fall into two categories. The first category involves fixing a single-layer scraper on the inner wall of the cylinder. The scraper and the screw blades are independent of each other, and the scraper passively removes a small amount of floating material from the cylinder wall by rotation. The scraper has no axial movement capability and cannot disturb the compacted powder in the middle of the cylinder. Moreover, the scraper can only scrape at fixed points, and large blind spots for material removal can easily form on the top, bottom, and sides of the cylinder. After long-term accumulation of moisture-soaked calcium carbonate, a hard, sticky layer is formed, which is difficult to remove with conventional fixed scrapers. The second category involves installing an independent vibrating motor on the outside of the cylinder, which relies on high-frequency vibration to loosen the material inside the cylinder. However, the vibrating motor is an external independent power unit, which requires a separate power supply line, significantly increasing the energy consumption of the entire machine. Continuous vibration will also aggravate fatigue wear of the cylinder welds and seals, shortening the service life of the equipment. At the same time, vibration can only slightly alleviate the accumulation of powder on the surface and has no significant loosening effect on the deep compacted and lumpy material inside the cylinder.

[0004] Therefore, a solution is proposed. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an anti-blocking conveying device for a calcium carbonate production line, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a calcium carbonate production line anti-clogging conveying device, comprising a mounting base, a spiral conveying cylinder fixedly mounted on the top of the mounting base, a drive motor fixedly connected to the outer wall of the spiral conveying cylinder, a spline shaft fixedly connected to the output end of the drive motor, a spline sleeve slidably mounted on the outer wall of the spline shaft, a drive shaft fixedly connected to the outer side of the spline sleeve, spiral conveying blades fixedly connected to the outer wall of the drive shaft, a plurality of cleaning scrapers fixedly connected to the outer edge of the spiral conveying blades, a drive wheel fixedly connected to the end of the spline shaft away from the drive motor, two driven wheels meshing with the outer side of the drive wheel, a reciprocating screw fixedly connected to the shaft center of the driven wheels, a threaded sleeve threaded onto the outer wall of the reciprocating screw, an axial linkage tie rod fixedly connected to the side wall of the threaded sleeve, and the other end of the axial linkage tie rod fixedly connected to the spline sleeve.

[0007] Preferably, a synchronous transmission assembly is provided on the outer wall of the spiral conveyor cylinder, the synchronous transmission assembly is driven by the drive wheel, and several fixed cylinders are arranged axially on the outer side of the spiral conveyor cylinder. A sealed pressure-storing installation cavity is opened inside the fixed cylinder, and a drive piston is sealed and slidably assembled inside the installation cavity. A piston push-pull rod is fixed at one end of the outer side of the drive piston.

[0008] Preferably, a sealed, pressurized mounting cavity is formed inside the fixed cylinder, and a drive piston is slidably assembled inside the mounting cavity. A piston push-pull rod is fixed to one end of the drive piston facing the outside of the spiral conveying cylinder. The piston push-pull rod can extend and retract synchronously with the drive piston. A mounting bracket is fixed to the outer wall of the spiral conveying cylinder, and a linear guide slide rod is horizontally fixed inside the mounting bracket. A slider is sleeved on the outer surface of the linear guide slide rod.

[0009] Preferably, the outer end of the piston push-pull rod is fixedly connected to a connector, and the force transmission connector is connected to the synchronous sliding slider. When the slider slides, the piston is driven synchronously by the connector and the piston push-pull rod to form a synchronous piston push-pull structure.

[0010] Preferably, the outer side of the fixed cylinder is connected to a connecting pipe, the end of the connecting pipe is connected to a jet pipe, the jet pipe extends into the inner cavity of the spiral conveying cylinder, the jet pipe wall is evenly provided with several directional spray holes, and the outer side of the fixed cylinder is connected to an air inlet pipe.

[0011] Preferably, one-way flow control valves are installed inside both the intake pipe and the connecting pipe, and the airflow directions of the two one-way flow control valves are opposite.

[0012] Preferably, the synchronous transmission assembly includes two active synchronous pulleys, both of which are coaxially fixed with the active pulley. The active synchronous pulleys are connected to the driven synchronous pulley via a synchronous belt. A second bevel gear is fixedly connected to the axis of the driven synchronous pulley, and a first bevel gear meshes with the outer side of the second bevel gear. An eccentric drive rotating disk is fixedly connected to the center of the end face of the first bevel gear. The second bevel gear is rotatably mounted on the outer wall of the screw conveyor cylinder via a support shaft. A hinge rod is hinged at the eccentric position of the eccentric drive rotating disk, and a drive rod is hinged to the end of the hinge rod away from the rotating disk. The drive rod is fixedly connected to all synchronous sliding blocks. When the rotating disk rotates, the drive rod is driven to reciprocate and translate as a whole through the hinge rod, thereby realizing the synchronous action of multiple sets of driving pistons inside the fixed cylinder.

[0013] Preferably, a scraping gap is reserved between the outer edge of the cleaning scraper and the inner wall of the spiral conveyor cylinder. When the cleaning scraper rotates synchronously with the drive shaft, it can continuously scrape off the agglomerated calcium carbonate powder adhering to the cylinder wall.

[0014] Preferably, the top of the spiral conveyor cylinder is connected to the feeding hopper, and the bottom discharge side of the spiral conveyor cylinder is connected to the unloading hopper. The inner cavities of the feeding hopper and the unloading hopper are connected to the conveying cavity of the spiral conveyor cylinder to form a material feeding and discharging assembly.

[0015] This invention provides an anti-clogging conveying device for a calcium carbonate production line. It has the following beneficial effects: 1. When the equipment is running, the drive motor drives the drive shaft to rotate synchronously. The cleaning scraper can scrape off the damp and clumps of calcium carbonate powder adhering to the inner wall of the spiral conveyor cylinder in real time, which can reduce the long-term accumulation and caking of powder, resulting in wall blockage. At the same time, the spline shaft drives the drive wheel and driven wheel to drive the reciprocating screw to rotate. The axial linkage tie rod pulls the spline sleeve to slide back and forth along the spline shaft, causing the spiral conveyor blades and the cleaning scraper to move slightly axially. This can continuously disturb the compacted powder in the cylinder, break up the layered and compacted material, and effectively avoid the failure of compaction bridging and material jamming in the middle section during the conveying of calcium carbonate powder.

[0016] 2. This invention relies on the synchronous transmission assembly matched with the drive wheel to drive the drive rod to reciprocate and translate, and then through the slider and connecting parts, the piston push-pull rod drives the drive piston in the fixed cylinder to reciprocate in the sealed installation cavity. This can generate a high-pressure airflow inside the fixed cylinder. The high-pressure airflow is injected into the spiral conveyor cylinder through the directional nozzle of the jet pipe, which can promptly impact and break up the loose agglomerated powder scraped off by the cleaning scraper, preventing the scraped powder from adhering to the cylinder wall again and causing re-blockage, and further improving the anti-blockage effect of calcium carbonate powder conveying. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the mounting base structure of the present invention; Figure 3 This is a schematic diagram of the feeding hopper structure of the present invention; Figure 4 This is a schematic diagram of the hinge rod structure of the present invention; Figure 5 This is a schematic diagram of the spiral conveyor blade structure of the present invention; Figure 6 This is a schematic diagram of the mounting bracket structure of the present invention; Figure 7 for Figure 4 Enlarged view of point A in the middle; Figure 8 This is a cross-sectional view of the fixing cylinder of the present invention.

[0018] The components include: 1. mounting base; 2. screw conveyor cylinder; 3. feeding hopper; and 4. discharging hopper. 51. Fixed cylinder; 52. Piston push-pull rod; 53. Jet pipe; 54. Drive piston; 55. Mounting cavity; 56. Connecting pipe; 61. Rotating disk; 62. Hinge rod; 63. Drive rod; 64. Slider; 65. Connector; 66. Mounting bracket; 67. Slide rod; 68. Bevel gear one; 69. Bevel gear two; 71. Cleaning scraper; 72. Spiral conveyor blade; 73. Driven wheel; 74. Driving wheel; 75. Reciprocating screw; 76. Threaded sleeve; 77. Splined sleeve; 78. Splined shaft; 79. Drive shaft; 710. Axial linkage rod; 8. Drive motor. Detailed Implementation

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see the appendix Figure 1 - Appendix Figure 8This invention provides an anti-clogging conveying device for a calcium carbonate production line. The device uses a mounting base 1 as the foundation for all components. The mounting base 1 also buffers the mechanical vibrations generated during operation, maintaining the precision of the various transmission structures and reducing abnormal wear of components during long-term operation. The top of the mounting base 1 is rigidly fixed to the spiral conveying cylinder 2 using flange welding. The spiral conveying cylinder 2 is horizontally arranged to meet the requirements of closed conveying of calcium carbonate powder. The top side of the spiral conveyor cylinder 2 is connected to the feeding hopper 3, and the bottom discharge side is connected to the discharging hopper 4. The inner cavities of both the feeding hopper 3 and the discharging hopper 4 are connected to the conveying cavity of the spiral conveyor cylinder 2. Together, they constitute the material feeding and discharging assembly. The feeding hopper 3 is designed with a conical flared structure that is wider at the top and narrower at the bottom. Compared with a straight cylinder feeding structure, it can receive calcium carbonate powder falling from the upstream process, reduce the material falling drop, and significantly reduce the splashing dust of ultrafine calcium carbonate powder. At the same time, the conical slope can initially guide the agglomerated powder, preventing large pieces of material from directly impacting the inside of the cylinder and causing dust. Localized material accumulation occurs; the discharge hopper 4 can flexibly connect to downstream silos, packaging machines, and other supporting equipment to achieve uninterrupted continuous powder transfer. The upper and lower hoppers cooperate to ensure smooth material flow throughout the entire conveying path, reducing the causes of material blockage from both the inlet and outlet ends. The drive motor 8 is fixedly mounted on the outer wall of the screw conveyor cylinder 2. The power output end of the drive motor 8 is coaxially connected to the spline shaft 78. The outer wall of the spline shaft 78 is uniformly machined with external rectangular splines. The spline sleeve 77 is slidably fitted onto the outside of the spline shaft 78. The inner wall of the spline sleeve 77 is opened to fit the spline shaft 78. The spline and the two together form a spline sliding pair, which has the following functions: First, all the rotational torque output by the drive motor 8 can be transmitted to the spline sleeve 77 through the meshing tooth surfaces of the inner and outer splines. The tooth surface contact area is large, the torque transmission is stable, and there will be no slippage or loss of rotation, ensuring sufficient power for powder conveying. Second, while the spline sleeve 77 rotates synchronously with the spline shaft 78, it is not constrained by the rotational motion and can slide back and forth without jamming along the axial direction of the spline shaft 78, realizing synchronous compatibility of rotational conveying and axial movement.A drive shaft 79 is fixedly connected to the outside of the spline sleeve 77. The drive shaft 79 passes through the sealing end caps at both ends of the screw conveyor cylinder 2. The end caps are filled with wear-resistant packing sealant to prevent calcium carbonate dust inside the cylinder from leaking outward along the shaft seam, and at the same time reduce dust from entering the spline sliding pair and causing jamming and wear. The outer wall of the drive shaft 79 is welded with screw conveyor blades 72 in sections along the axial direction. Multiple cleaning scrapers 71 are evenly welded to the outer circumference of each section of screw conveyor blades 72. The outer edge of the cleaning scraper 71 has a pre-reserved scraping gap with the inner wall of the screw conveyor cylinder 2. This gap serves two purposes. It can ensure that the cleaning scraper 71 completely removes the moisture and caking calcium carbonate deposits adhering to the cylinder wall. On the other hand, it can avoid direct hard friction between the cleaning scraper 71 and the cylinder steel plate, reduce the mixing of metal shavings into the calcium carbonate powder and cause product contamination, and at the same time reduce the wear rate of the scraper and the cylinder, and extend the replacement cycle of vulnerable parts. The cleaning scraper 71 and the spiral conveyor blade 72 are fixedly connected as one unit, and the two rotate synchronously with the drive shaft 79. The scraping action and the material pushing action are synchronized. The scraped powder can be immediately carried away by the spiral blade and will not accumulate locally on the cylinder wall.

[0021] The end of the spline shaft 78 furthest from the drive motor 8 is fixedly connected to a drive wheel 74. Two driven wheels 73 are symmetrically meshed on the left and right sides of the drive wheel 74. The symmetrical meshing layout on both sides can cancel out the radial lateral force generated by the gear meshing, avoiding radial wobble of the spline shaft 78 caused by the force on one side of the gear, and greatly reducing the wear of the spline shaft 78 and the bearings at both ends. The reciprocating screw 75 is rigidly fixed coaxially at the axial center of each driven wheel 73. The reciprocating screw 75 is machined with a continuous reciprocating thread. The threaded sleeve 76 is matched with the threaded sleeve 76 on the outer wall of the reciprocating screw 75. The threaded sleeve 76 is precisely fitted with the screw thread. When the driven wheel 73 drives the reciprocating screw 75 to rotate continuously, the threaded sleeve 76 can make a uniform and smooth continuous reciprocating linear motion along the reciprocating screw 75. A laterally fastened axial linkage rod 710 is welded to the side wall of the threaded sleeve 76. The end of the axial linkage rod 710 away from the threaded sleeve 76 is rigidly welded to the side wall of the spline sleeve 77. During the reciprocating linear movement of the threaded sleeve 76, the axial linkage rod 710 continuously pushes and pulls the spline sleeve 77, thereby driving the drive shaft 79, the spiral conveyor blade 72, and the cleaning scraper 71 to move slightly axially along the spline shaft 78. The axially moving spiral conveyor blade 72 can repeatedly disturb the calcium carbonate powder that is continuously squeezed and compacted inside the cylinder, break up the dense material layer formed in the middle of the cylinder, destroy the powder bridging structure, and solve the compaction and jamming problem from the middle of the material conveying path. At the same time, the axially moving cleaning scraper 71 can scrape back and forth along the entire length of the cylinder to achieve cleaning of the entire inner wall of the cylinder without dead corners, further enhancing the anti-clogging effect.

[0022] The outer wall of the spiral conveyor cylinder 2 is also equipped with a synchronous transmission assembly. The synchronous transmission assembly and the drive wheel 74 achieve pure mechanical transmission cooperation. The synchronous transmission assembly includes two sets of drive synchronous wheels. The two sets of drive synchronous wheels are coaxially locked and fixed on the end face of the drive wheel 74. They can rotate synchronously and at the same speed as the drive wheel 74, realizing the synchronous diversion of conveying power to the pulse blowing mechanism. Each set of active synchronous pulleys is connected to the driven synchronous pulley via a thickened rubber synchronous belt. The teeth of the synchronous belt are fully engaged with the teeth of the synchronous pulleys. A bevel gear 69 is fixedly connected to the shaft of the driven synchronous pulley. The bevel gear 69 is rotatably mounted on the outer wall of the screw conveyor cylinder 2 via an independent support shaft. The outer side of the bevel gear 69 meshes with a bevel gear 68. The two sets of bevel gears are arranged perpendicularly and orthogonally, which can convert the horizontal rotational power into vertical plane rotational power. This adapts to the arrangement space of the outer eccentric transmission structure and reduces the lateral area occupied by the whole machine. The center of the end face of the bevel gear 68 is rigidly fixed to the eccentric drive rotating disk 61. A hinge hole is opened on the disk surface of the eccentric drive rotating disk 61 at a position off the center. The hinge rod 62 is hinged to the hinge rod 62 inside the hinge hole with a pin. When the eccentric drive rotating disk 61 rotates at a constant speed, one end of the hinge rod 62 follows the eccentric trajectory and makes a continuous circular oscillation. The other end of the hinge rod 62 away from the rotating disk 61 is hinged to the side wall of the drive rod 63, continuously pulling the drive rod 63 to make an overall reciprocating translational motion in a direction parallel to the screw conveyor cylinder 2.

[0023] Two sets of mounting brackets 66 are symmetrically fixed to the outer wall of the screw conveyor cylinder 2. A linear guide slide rod 67 is horizontally fixed between the two sets of mounting brackets 66. The linear guide slide rod 67 is arranged parallel to the axis of the screw conveyor cylinder 2. Several sliders 64 are slidably sleeved on the outer surface of the linear guide slide rod 67. All sliders 64 are uniformly and tightly connected to the drive rod 63. The linear guide slide rod 67 and the sliders 64 cooperate with each other to provide a limit for the entire piston push-pull structure, constraining the drive rod 63 and the piston push-pull rod 52 to only move along the cylinder axis, avoiding radial displacement during piston movement, and ensuring that the drive piston 54 slides in the mounting cavity 55 in a sealed manner without air leakage. Multiple sliders 64 are synchronously fixed on the same drive rod 63, which can synchronously drive all piston push-pull units to move synchronously, ensuring that the pulse jet action of the fixed cylinder 51 at all points along the cylinder axis is synchronous and the airflow disturbance inside the cylinder is uniform.

[0024] Several fixed cylinders 51 are evenly arranged axially on the outer side of the spiral conveyor cylinder 2. Multiple sets of fixed cylinders 51 are arranged along the entire length of the cylinder, ensuring that the feeding section, middle section, and discharge section of the cylinder all have pulse purging capabilities to thoroughly break up agglomerated powder. A sealed, pressurized mounting cavity 55 is opened inside each fixed cylinder 51. A drive piston 54 is sealed and slidably assembled inside the mounting cavity 55. A wear-resistant rubber sealing ring is installed in the annular groove of the outer ring of the drive piston 54. The outer ring of the sealing ring is tightly fitted to the inner wall of the mounting cavity 55 throughout its entire length, isolating the gas inside and outside the cavity and ensuring compressed air storage and pressurization. To improve efficiency and prevent air leakage from causing insufficient purge air pressure and the inability to break up clumps of powder, a piston push-pull rod 52 is rigidly fixed to one end of the drive piston 54 facing the outside of the spiral conveyor cylinder 2. The piston push-pull rod 52 can move synchronously with the drive piston 54. The outer end of the piston push-pull rod 52 away from the drive piston 54 is fixed to the connecting piece 65. The other side of the connecting piece 65 is fixedly connected to the slider 64. During the reciprocating sliding of the slider 64, the drive piston 54 is pushed and pulled synchronously through the connecting piece 65 and the piston push-pull rod 52, forming a synchronous piston push-pull structure.

[0025] The wall of the fixed cylinder 51 is connected to the air inlet pipe and the connecting pipe 56, which are connected to the external atmosphere. The end of the connecting pipe 56 away from the fixed cylinder 51 is connected to the diversion pipe. The end of the diversion pipe is connected to the jet pipe 53. The jet pipe 53 extends laterally into the inner cavity of the screw conveyor cylinder 2. Several directional spray holes are evenly opened along the length of the jet pipe 53. All spray holes face the inner wall of the cylinder and the main material channel, so as to target the suspended agglomerated powder scraped off by the cleaning scraper 71. One-way flow control valves are installed inside the air inlet pipe and the connecting pipe 56. The airflow directions of the two one-way flow control valves are completely opposite. The two work together to achieve automatic circulation and storage of air. When the drive piston 54 pushes the compressed air to the cylinder side, the one-way valve inside the air inlet pipe automatically closes. The one-way valve of the connecting pipe 56 opens synchronously, and the compressed high-pressure airflow in the mounting cavity 55 is transported along the pipeline to the jet pipe 53. It is ejected at high speed from the directional nozzle to form a pulse airflow. The instantaneous impact force can break up the wet calcium powder clumps peeled off by the scraper, preventing the powder from falling back and adhering to the cylinder wall again to form secondary blockage. When the drive piston 54 retracts outward and the volume of the mounting cavity 55 expands to form a negative pressure, the one-way valve inside the connecting pipe 56 automatically closes and the one-way valve of the air inlet pipe opens. The ambient air pressure quickly replenishes the mounting cavity 55 to complete the air storage and wait for the next compression jet cycle. With the above structure, the triple anti-blocking action works synchronously to solve the problem of calcium carbonate powder conveying blockage from three directions: wall adhesion, compaction, and agglomeration.

[0026] Working Principle: When the equipment is running, the drive motor 8 is started, which drives the spline shaft 78 to rotate continuously. The spline shaft 78 relies on its own external spline structure to mesh with the spline sleeve 77, transmitting rotational power synchronously to the spline sleeve 77 and the drive shaft 79 rigidly connected to the spline sleeve 77. The drive shaft 79 rotates circumferentially as a whole, and the spiral conveying blades 72 fixed on the outer wall of the drive shaft 79 rotate synchronously. The spiral conveying blades 72 continuously push the calcium carbonate powder falling from the upper feed hopper 3 into the spiral conveying cylinder 2 based on their own spiral curved surface. Under the pushing action of the spiral conveying blades 72, the powder moves axially along the spiral conveying cylinder 2 and is finally discharged from the bottom feed hopper 4, completing the continuous powder conveying operation. The multiple sets of cleaning scrapers 71 on the outer edge of the spiral conveying blades 72 rotate synchronously with the drive shaft 79. The outer edge of the cleaning scraper 71 maintains a small scraping gap with the inner wall of the spiral conveying cylinder 2, continuously scraping away the damp and agglomerated calcium carbonate powder adhering to the inner wall of the cylinder during the rotation, avoiding Powder accumulates and clumps over a long period, causing blockages on the walls. While the splined shaft 78 continuously rotates to convey the material, the drive wheel 74, fixedly mounted at the end of the splined shaft 78 away from the drive motor 8, rotates synchronously and coaxially. The drive wheel 74 meshes with two sets of driven wheels 73 on both sides, causing the two sets of driven wheels 73 to rotate synchronously. This, in turn, drives the reciprocating screw 75 to rotate synchronously. The threaded sleeve 76 on the outside of the reciprocating screw 75 moves continuously in a straight axial direction, reciprocating along the screw's body. During operation, the spline sleeve 77 is continuously pushed and pulled by the axial linkage rod 710. The spline sleeve 77 slides back and forth along the axis of the spline shaft 78 based on the sliding fit structure between it and the spline shaft 78. This drives the drive shaft 79, the spiral conveyor blade 72, and the cleaning scraper 71 to move slightly in the same direction in the same direction. The spiral conveyor blade 72, which moves back and forth in the axis, can continuously disturb the compacted calcium carbonate powder in the cylinder, break up the layered material, and effectively prevent the powder from being compacted and causing blockage and bridging problems in the middle section. Meanwhile, two sets of active synchronous pulleys, coaxially fixed to the outer side of the active wheel 74, rotate synchronously with the active wheel 74. The active synchronous pulleys drive the driven synchronous pulleys to rotate synchronously via a synchronous belt. The driven synchronous pulleys drive the bevel gear 69 to rotate, and the bevel gear 69 rotates synchronously and meshes with the bevel gear 68 to complete the power reversal. The eccentric drive rotating disk 61, fixed at the center of the end face of the bevel gear 68, rotates synchronously. When the rotating disk 61 rotates, it drives one end of the hinge rod 62 to oscillate eccentrically. The other end of the hinge rod 62 is hinged to the side wall of the drive rod 63, which continuously pulls the drive rod 63 to reciprocate in a direction parallel to the spiral conveyor cylinder 2. When the drive rod 63 reciprocates, it drives all the sliders 64 to slide synchronously along the slide rod 67. During the sliding process, the sliders 64 will pull the piston push rod 52 to extend and retract synchronously through the connecting piece 65. The piston push rod 52 drives the drive piston 54 in the mounting cavity 55 inside the fixed cylinder 51 to slide back and forth in a sealed manner. When the drive piston 54 moves to the right, the inside of the mounting cavity 55 As the volume of the sealed space decreases, the air inside the cavity is compressed to form a high-pressure airflow. The one-way flow control valve inside the air inlet pipe is closed, while the one-way flow control valve inside the connecting pipe 56 is opened. The high-pressure airflow is transported to the jet pipe 53 through the connecting pipe 56, and finally injected at high speed into the spiral conveyor cylinder 2 from the directional nozzles distributed on the wall of the jet pipe 53. The high-pressure pulse airflow can impact and disperse the agglomerated calcium carbonate powder scraped off by the cleaning scraper 71 and suspended in the cylinder, preventing the scraped powder from adhering to the cylinder wall again and causing secondary blockage. When the drive piston 54 moves in the direction, the volume inside the mounting cavity 55 increases to form a negative pressure. The one-way flow control valve inside the connecting pipe 56 is closed, while the one-way flow control valve inside the air inlet pipe is opened. The ambient atmospheric pressure air enters the mounting cavity 55 through the air inlet pipe to complete one air storage cycle. As the drive piston 54 continues to reciprocate, the fixed cylinder 51 can continuously spray intermittent pulse airflow into the cylinder, which works in conjunction with the wall scraping action of the cleaning scraper 71 and the axial disturbance action of the spiral conveyor blades 72 to solve the problem of blockage in the conveying of calcium carbonate powder.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A blockage-prevention conveying device for a calcium carbonate production line, characterized in that: The system includes a mounting base (1), on which a spiral conveyor cylinder (2) is fixedly mounted. A drive motor (8) is fixedly connected to the outer wall of the spiral conveyor cylinder (2). A spline shaft (78) is fixedly connected to the output end of the drive motor (8). A spline sleeve (77) is slidably fitted to the outer wall of the spline shaft (78). A drive shaft (79) is fixedly connected to the outer side of the spline sleeve (77). A spiral conveyor blade (72) is fixedly connected to the outer wall of the drive shaft (79). The outer edge of the spiral conveyor blade (72) is fixedly connected to... Multiple cleaning scrapers (71) are connected. The spline shaft (78) is fixedly connected to a drive wheel (74) at one end away from the drive motor (8). Two driven wheels (73) are meshed on the outer side of the drive wheel (74). A reciprocating screw (75) is fixedly connected to the shaft center of the driven wheel (73). A threaded sleeve (76) is threaded on the outer wall of the reciprocating screw (75). An axial linkage rod (710) is fixedly connected to the side wall of the threaded sleeve (76). The other end of the axial linkage rod (710) is fixedly connected to the spline sleeve (77).

2. The anti-blocking conveying equipment for a calcium carbonate production line according to claim 1, characterized in that: The outer wall of the spiral conveying cylinder (2) is provided with a synchronous transmission assembly, which is driven by the drive wheel (74). Several fixed cylinders (51) are arranged axially on the outer side of the spiral conveying cylinder (2). A sealed pressure storage installation cavity (55) is opened inside the fixed cylinder (51). A drive piston (54) is sealed and slidably assembled inside the installation cavity (55). A piston push rod (52) is fixed at one end of the outer side of the drive piston (54).

3. The anti-blocking conveying equipment for a calcium carbonate production line according to claim 2, characterized in that: The fixed cylinder (51) has a sealed pressure storage installation cavity (55) inside. The installation cavity (55) has a sealed sliding assembly of a drive piston (54). The drive piston (54) has a piston push-pull rod (52) fixed at one end facing the outside of the spiral conveying cylinder (2). The piston push-pull rod (52) can extend and retract synchronously with the drive piston (54). The outer wall of the spiral conveying cylinder (2) has a fixed mounting bracket (66). The mounting bracket (66) has a horizontally fixed linear guide slide rod (67) inside. The outer surface of the linear guide slide rod (67) is fitted with a slider (64).

4. The anti-blocking conveying equipment for a calcium carbonate production line according to claim 3, characterized in that: The outer end of the piston push-pull rod (52) is fixedly connected to a connector (65). The force transmission connector (65) is connected to the synchronous sliding slider (64). When the slider (64) slides, it drives the piston (54) synchronously through the connector (65) and the piston push-pull rod (52) to form a piston synchronous push-pull structure.

5. The anti-blocking conveying equipment for a calcium carbonate production line according to claim 3, characterized in that: The fixed cylinder (51) is connected to a connecting pipe (56) on the outside. The end of the connecting pipe (56) is connected to a jet pipe (53). The jet pipe (53) extends into the inner cavity of the spiral conveying cylinder (2). Several directional spray holes are evenly opened on the wall of the jet pipe (53). The fixed cylinder (51) is connected to an air inlet pipe on the outside.

6. The anti-blocking conveying equipment for a calcium carbonate production line according to claim 5, characterized in that: Both the intake pipe and the connecting pipe (56) are equipped with one-way flow control valves, and the airflow conduction directions of the two one-way flow control valves are opposite.

7. The anti-blocking conveying equipment for a calcium carbonate production line according to claim 2, characterized in that: The synchronous transmission assembly includes two active synchronous pulleys, both of which are coaxially fixed with the active pulley (74). The active synchronous pulleys are connected to the driven synchronous pulleys via a synchronous belt. The driven synchronous pulleys are fixedly connected to a second bevel gear (69) at their shaft. The second bevel gear (69) meshes with a first bevel gear (68) on its outer side. An eccentric drive rotating disk (61) is fixedly connected to the center of the end face of the first bevel gear (68). The second bevel gear (69) is rotatably mounted on the outer wall of the spiral conveying cylinder (2) via a support shaft. A hinge rod (62) is hinged at the eccentric position of the eccentric drive rotating disk (61). A drive rod (63) is hinged at the end of the hinge rod (62) away from the rotating disk (61). The drive rod (63) is fixedly connected to all the synchronous sliding blocks (64). When the rotating disk (61) rotates, the drive rod (63) is driven to reciprocate and translate as a whole through the hinge rod (62), thereby realizing the synchronous action of the drive pistons (54) in multiple fixed cylinders (51).

8. The anti-blocking conveying equipment for a calcium carbonate production line according to claim 7, characterized in that: The outer edge of the cleaning scraper (71) and the inner wall of the spiral conveyor cylinder (2) are reserved to scrape off the clumps of calcium carbonate powder adhering to the cylinder wall. When the cleaning scraper (71) rotates synchronously with the drive shaft (79), it can continuously scrape off the clumps of calcium carbonate powder adhering to the cylinder wall.

9. The anti-blocking conveying equipment for a calcium carbonate production line according to claim 1, characterized in that: The top of the spiral conveyor cylinder (2) is connected to the feeding hopper (3), and the bottom discharge side of the spiral conveyor cylinder (2) is connected to the discharge hopper (4). The inner cavities of the feeding hopper (3) and the discharge hopper (4) are connected to the conveying cavity of the spiral conveyor cylinder (2) to form a material feeding and discharging assembly.

Images