Raw material lifting conveyor for sesame oil production

Abstract

The present application relates to sesame oil production technical field, specifically for a kind of raw material lifting conveyor based on sesame oil production, it include the rack of oblique setting, the low end of rack is equipped with feed inlet, high end is equipped with discharge port, rack is equipped with conveying belt and the driving mechanism for driving conveying belt operation, it further include tensioning wheel, movablely assembled in rack by elastic biasing assembly and resist contact at the return flow surface of conveying belt, to make the conveying surface of conveying belt keep tensioned state;Center convex band is positioned at the center of conveying belt;Two belt soft supports, are located in the annular cavity of conveying belt and are respectively located at the two sides of center convex band, the belt soft support is configured as can rotate towards the position close to the center of conveying belt, to make the load bearing surface of conveying belt form the groove shape of center recess, barrier structure, is set on the conveying surface of conveying belt, the barrier structure is configured as when the center recess of conveying belt forms the discharge gap for excess material to slide down.

Description

Technical Field

[0001] This invention relates to the field of sesame oil production technology, specifically to a raw material lifting conveyor for sesame oil production. Background Technology

[0002] In sesame oil production, the cleaned and roasted sesame seeds need to be continuously lifted and transported from a lower pre-processing device to a higher pressing, grinding, or temporary storage stage. Inclined belt conveyors have become the mainstream equipment for this stage due to their simple structure and continuous conveying capability. Existing inclined belt conveyors typically include an inclined frame with a feed inlet at the lower end and a discharge outlet at the upper end. A conveyor belt is wound inside the frame and driven by a drive mechanism to circulate. To prevent material from sliding down the inclined belt surface, crossbars are usually fixed on the belt surface, and skirts are installed on both sides of the belt.

[0003] Existing hoisting conveyors typically rely solely on the conveyor belt to carry material upwards. When the upstream material volume exceeds the design value, the drive drum torque increases sharply, and the motor is prone to burnout due to excessive stall current (i.e., "motor burnout from stalling"). Although some overload protection solutions exist in this field, they all have significant drawbacks: Although the electronically controlled regulation scheme (sensor + frequency converter + controller) can monitor the load, the air in the sesame oil production workshop is filled with a large amount of sesame dust and oil mist from roasting the seeds, forming a typical heavily polluted environment of "dust + oil". Dust can easily penetrate the sensor probe, causing the detection signal to drift or fail, while oil mist accelerates the aging and short circuit of electrical components, resulting in a high system failure rate, high maintenance costs, and the inability to achieve highly reliable pure mechanical protection.

[0004] Friction torque limiters are connected in series in the transmission chain. When overloaded, they cut off the torque by slipping between the driving disc and the driven disc. However, they are essentially "passive sacrificial" protection: they cannot actively reduce the amount of material on the belt. If the load continues, the machine still needs to be stopped for cleaning. Moreover, frequent slippage will cause severe wear of the friction plates, drift of the torque setting value, and decrease in protection accuracy over long-term operation. The machine must be stopped regularly for adjustment or replacement.

[0005] The plow-type unloader has a fixed scraper in the middle of the conveyor to forcibly remove excess material. The scraper scrapes hard against the herringbone pattern and corrugated skirt of the conveyor belt surface. Long-term operation damages the belt surface structure, shortens the belt life, and increases running resistance. At the same time, the scraper squeezes and shears the sesame particles, which can easily cause the sesame seeds to break and release oil or produce powder. This not only wastes raw materials but also directly affects the quality and purity of subsequent oil products. In addition, traditional plow-type unloaders are installed at a fixed height and cannot adaptively adjust according to the distribution of materials in the belt width direction. They cannot detect off-center loads or achieve uniform material distribution and anti-off-center operation.

[0006] Therefore, this application proposes a raw material lifting conveyor for sesame oil production. Summary of the Invention

[0007] The purpose of this invention is to provide a raw material lifting conveyor for sesame oil production to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a raw material lifting conveyor for sesame oil production, comprising an inclined frame, an inlet at the lower end of the frame and an outlet at the upper end, a conveyor belt and a drive mechanism for driving the conveyor belt within the frame, and further comprising: The tensioning pulley is movably mounted on the frame via an elastic biasing component and abuts against the return surface of the conveyor belt to keep the conveying surface of the conveyor belt taut. The conveyor belt is provided with a central convex belt at its center position; Two belt supports are set inside the annular cavity of the conveyor belt and located on both sides of the central convex belt. The belt supports are configured to rotate toward the center of the conveyor belt, thereby forming a groove shape that is recessed toward the center on the conveyor belt bearing surface. The load sensing mechanism includes a telescopic airbag that deforms with the force of the belt soft support and a pull handle connected to the belt soft support. The load sensing mechanism is configured to respond to the material pressure on the belt soft support by driving the pull handle to rotate the belt soft support towards the center through the compression of the telescopic airbag. This causes the belt soft support on the corresponding side to be under increased pressure and tilt towards the center when the material on the conveyor belt is overloaded, resulting in an increased amount of indentation in the center of the conveyor belt. A baffle structure is disposed on the conveying surface of the conveyor belt, the baffle structure being configured to form a discharge gap for excess material to slide down when the center of the conveyor belt is recessed.

[0009] Preferably, the elastic biasing assembly includes: a guide frame fixed to the frame; a slide block slidably mounted inside the guide frame; a spring plate disposed at the top of the guide frame and abutting against the slide block; and a tensioning wheel rotatably mounted on the slide block and abutting against the inner wall of the return surface of the conveyor belt.

[0010] Preferably, the drive mechanism includes: two pulleys, which are rotatably connected to the lower end and the upper end of the frame, respectively; a conveyor belt is wound around the outer surface of the two pulleys; and a drive motor, which is fixedly connected to the frame and is used to drive the pulleys to rotate, thereby driving the conveyor belt to run in a cycle.

[0011] Preferably, the sensing mechanism further includes an air cylinder and an air circuit assembly connecting the telescopic airbag and the air cylinder; there are two telescopic airbags, which are respectively disposed on both sides of the tensioning wheel, and the top of each telescopic airbag is rotatably connected to the corresponding side of the belt support via a rotating shaft; the air circuit assembly includes an air supply pipe sleeved on the outer surface of the tensioning wheel, the two ends of the air supply pipe are respectively connected to the two telescopic airbags, the side of the air supply pipe is connected to a side passage pipe, the end of the side passage pipe away from the air supply pipe is fixedly connected to the air cylinder, and the side passage pipe is connected to the interior of the air cylinder through multiple side pipes.

[0012] Preferably, the sensing mechanism further includes: a movable piston rod, which is slidably connected to the top of the air cylinder and is pushed downward by the gas entering the upper space of the air cylinder; a pull handle, one end of which is rotatably connected to the top of the movable piston rod, and the other end of which is rotatably connected to one side of the corresponding side of the belt soft support, so that when the movable piston rod moves downward, it pulls the belt soft support to rotate and tilt; and a return spring, which is connected between the movable piston rod and the air cylinder, and is used to drive the movable piston rod to return to its original position after moving downward.

[0013] Preferably, a traction assembly is provided between the belt support and the central convex belt. The traction assembly includes a plurality of limiting balls. Each belt support has a plurality of limiting balls on its side near the center of the conveyor belt. The side of the central convex belt has a traction groove for the limiting balls to slide, so that when the belt support rotates and tilts, the sliding of the limiting balls in the traction groove will cause the center of the conveyor belt to be synchronously concave.

[0014] Preferably, the partition structure includes multiple sets of partitions arranged at intervals along the conveying direction of the conveyor belt. Each set of partitions includes two symmetrically arranged fixed plate seats, each fixed plate seat being fixedly connected to the conveying surface of the conveyor belt. Each fixed plate seat has a movable gate plate slidably connected to its side in a direction close to or away from the conveying surface. A limit rod is fixedly connected to the movable gate plate, the limit rod slidably passing through the fixed plate seat, and a spring sleeve for driving the movable gate plate to reset is provided on the outer surface of the limit rod.

[0015] Preferably, the partition structure further includes an adjustment linkage assembly, which includes: a displacement link connected to the center of the conveyor belt's conveying surface; an adjustment plate fixedly connected to both sides of the displacement link, the adjustment plate being located directly below the movable gate on the corresponding side; an arc groove formed on the side of the movable gate; a movable block slidably connected within the arc groove; and a push handle, one end of the adjustment plate being rotatably connected to the movable block via the push handle. The adjustment linkage assembly is configured such that when the center of the conveyor belt is recessed, the displacement link causes the adjustment plate to tilt, and the adjustment plate, via the push handle, pulls the movable block to slide within the arc groove, pushing the movable gate to slide and misalign relative to the fixed plate seat, thereby forming a discharge gap between the fixed plate seat and the movable gate.

[0016] Preferably, it also includes a return box, which is disposed at the lower end of the frame and below the conveyor belt, for receiving the material discharged from the unloading gap.

[0017] Preferably, the side of the conveyor belt is fixedly connected with a corrugated skirt.

[0018] Compared with the prior art, the beneficial effects of the present invention are: 1. Two soft belt supports are located on both sides of the central convex belt and can rotate and flip towards the center of the conveyor belt. When the pressure increases, the bearing surface automatically forms a groove shape that is concave towards the center. Under the action of gravity, the material gathers towards the center of the belt, which fundamentally prevents small and slippery sesame seeds from falling from both sides of the conveyor belt. When the material is unbalanced to the left and right, the soft belt support on the side with greater pressure flips at a larger angle and the belt surface on that side is concave more deeply. The differential movement on both sides causes the material to automatically slide and spread towards the center, achieving uniform material distribution that adapts to the load without manual intervention.

[0019] 2. The tensioning wheel is movably mounted on the frame and abuts against the return surface of the conveyor belt via an elastic biasing component. The spring plate applies a continuous biasing force to the tensioning wheel via the slide block. When the conveyor belt becomes loose due to wear and stretching, the spring plate automatically pushes the slide block to slide and compensate, so that the tensioning wheel continuously presses against the return surface and the conveyor surface is always taut. There is no need to stop the machine for manual adjustment, which effectively avoids slippage, deviation and material slippage caused by belt looseness.

[0020] 3. The load-sensing mechanism uses the material's own gravity as its power source, forming a purely mechanical-pneumatic self-feedback closed loop: the belt support is compressed, the telescopic airbag is compressed, gas enters the air cylinder through the air passage, pushing the moving piston rod downwards, and the pull handle pulls the belt support further towards the center, increasing the belt surface indentation. The greater the load, the deeper the indentation, achieving adaptive adjustment of "deep indentation under heavy load and shallow indentation under light load"; no sensors, controllers, or power supply are required throughout the process, all components are mechanical and pneumatic, resistant to high-temperature and high-dust grease workshop environments, resulting in high reliability and low manufacturing cost.

[0021] 4. The limiting ball and the traction groove constitute the traction assembly. When the belt soft support flips, the sliding traction of the limiting ball in the traction groove causes the center position of the conveyor belt to be simultaneously recessed, so that the bearing surface forms a complete and continuous groove shape. The rolling friction of the ball is small, the wear is low, and it does not scratch the belt body. At the same time, it plays a limiting and guiding role in the relative movement between the belt soft support and the central convex belt, so the transmission is smooth and reliable.

[0022] 5. The separator composed of the fixed plate base and the movable gate plate forms a complete partition under normal conditions, preventing materials from sliding down the inclined belt surface; when overloaded, the movable gate plate slides and misaligns with the fixed plate base to form a discharge gap, automatically discharging excess material. It integrates the dual functions of "anti-slip partition" and "automatic discharge valve" and requires no additional power source.

[0023] 6. The adjustment linkage component transmits the amount of concavity at the center of the belt surface through the displacement linkage, adjustment plate, push handle, movable block and arc groove to the misalignment of the movable gate, realizing the pure mechanical linkage of "concavity-discharge". The sliding cooperation between the arc groove and the movable block makes the force transmission direction transition smoothly and avoids transmission jamming. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the structure inside the conveyor belt in this invention; Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A; Figure 4 This is an exploded structural diagram of the conveyor belt and belt support in this invention; Figure 5 This is a schematic diagram of the tensioning wheel and conveyor belt in this invention; Figure 6 This is a schematic diagram of the structure of the belt soft support in this invention; Figure 7 For the present invention Figure 6 Enlarged structural diagram at point B; Figure 8 This is a schematic diagram of the structure of the central convex band and the limiting ball in this invention; Figure 9 This is a schematic diagram of the structure of the fixed plate base and the movable gate in this invention.

[0025] In the diagram: 100, frame; 101, support; 102, discharge port; 103, feed port; 104, conveyor belt; 105, pulley; 106, drive motor; 107, corrugated skirt; 200, belt support; 201, tension pulley; 202, central convex belt; 203, slide; 204, guide frame; 205, spring plate; 206, rotating shaft; 207, telescopic airbag; 208, air supply pipe; 20 9. Side passage pipe; 210. Air cylinder; 211. Bypass pipe; 212. Moving piston rod; 213. Return spring; 214. Pull handle; 300. Fixed plate seat; 301. Movable gate; 302. Limit rod; 303. Spring sleeve; 304. Adjustment plate; 305. Displacement connecting rod; 306. Arc groove; 307. Movable block; 308. Push handle; 309. Traction groove; 310. Limiting ball; 400. Return box. Detailed Implementation

[0026] The technical solutions of 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.

[0027] Example 1: Please refer to Figures 1 to 9 This invention provides a technical solution: a raw material lifting conveyor for sesame oil production, comprising an inclined frame 100. A support 101 is fixedly connected to the side of the frame 100, with the lower end of the support 101 abutting the ground to provide stable support for the inclined frame 100. Diagonal bracing can also be installed between the support 101 and the frame 100 for reinforcement. A feed inlet 103 is located at the lower end of the frame 100, and a discharge outlet 102 is located at the upper end. Roasted sesame seeds fall from the feed inlet 103 onto the conveyor belt 104, are conveyed obliquely upwards by the conveyor belt 104, and finally discharge from the discharge outlet 102 to enter the next process.

[0028] The frame 100 has two rotatably connected pulleys 105, located at the lower and upper ends of the frame 100 respectively. A conveyor belt 104 is wound around and tensioned on the outer surfaces of the two pulleys 105 to form a closed loop. A drive motor 106 is fixedly connected to the side of the frame 100. The drive motor 106 can be connected to the pulleys 105 via couplings, reducers, and other transmission components to drive the pulleys 105 to rotate, thereby driving the conveyor belt 104 to circulate. Corrugated skirts 107 are fixedly connected to both sides of the conveyor belt 104. The corrugated skirts 107 are corrugated rubber skirts extending along the entire conveying direction and can be connected to the conveyor belt 104 by vulcanization bonding. The corrugated structure allows it to bend with the concavity and deformation of the belt surface, preventing material from spilling from both sides of the belt surface under normal conditions.

[0029] Furthermore, a guide frame 204 is fixedly connected to the inner wall of the middle section of the frame 100. A slide block 203 is slidably mounted inside the guide frame 204 in the direction close to or away from the return surface of the conveyor belt 104. A spring plate 205 is provided on the inner top of the guide frame 204, and the spring plate 205 abuts against the slide block 203. The spring plate 205 can be made of arc-shaped spring steel plate, with one end fixedly connected to the inner top of the guide frame 204 and the free end pressing against the top of the slide block 203. This is an alternative method. The two ends of the spring plate 205 can also be connected to the inner top of the guide frame 204 and the top of the slide block 203, respectively. Due to elastic deformation, the spring plate 205 applies a continuous biasing force to the slide block 203 in the direction of the return surface of the conveyor belt 104. A tension wheel 201 is rotatably mounted on the slide block 203, and the outer circumferential surface of the tension wheel 201 abuts against the inner wall of the return surface of the conveyor belt 104.

[0030] After assembly, the biasing force of the spring plate 205 is transmitted to the tensioning wheel 201 through the slide 203, so that the tensioning wheel 201 continuously presses the return surface of the conveyor belt 104, keeping the conveyor surface in a taut state. When the conveyor belt 104 stretches and loosens due to wear or stretching, the elastic restoring force of the spring plate 205 automatically pushes the slide 203 to slide along the guide frame 204 to compensate, and the tensioning wheel 201 follows suit to press it tight. There is no need to stop the machine for manual adjustment, which avoids slippage, deviation and material slippage caused by belt loosening.

[0031] Furthermore, a central convex belt 202 is fixedly connected to the center of the conveyor belt 104 annular cavity. The central convex belt 202 extends continuously along the conveying direction, and its cross-section can be rectangular or trapezoidal. It can be integrally vulcanized or bonded to the conveyor belt 104. Two belt supports 200 are also provided within the annular cavity, located on either side of the central convex belt 202. Under normal conditions, they jointly support the inner wall of the conveying surface of the conveyor belt 104, preventing the conveying surface from collapsing to both sides under the weight of the material. The belt supports 200 can be arc-shaped, with their supporting surfaces conforming to the shape of the inner wall of the conveying surface of the conveyor belt 104. A low-friction lining, such as an ultra-high molecular weight polyethylene lining, can be laminated onto the supporting surface to reduce resistance to the operation of the conveyor belt 104. Each belt support 200 is configured to rotate and flip towards the center of the conveyor belt 104.

[0032] The tensioning pulley 201 has two telescopic airbags 207 on both sides. The telescopic airbags 207 can be rubber bellows type airbags, and their tops are rotatably connected to the corresponding belt support 200 via a rotating shaft 206. An air supply pipe 208 is coaxially sleeved on the outer surface of the tensioning pulley 201. A bearing or clearance fit can be provided between the air supply pipe 208 and the tensioning pulley 201 to ensure that the air supply pipe 208 does not rotate with the tensioning pulley 201 and that the air circuit connection is stable. Both ends of the air supply pipe 208 are connected to the inner cavities of the two telescopic air bags 207 respectively; the side of the air supply pipe 208 is connected to a side pipe 209, and the end of the side pipe 209 away from the air supply pipe 208 is fixedly connected to and connected to the air cylinder 210. The side pipe 209 is also connected to the interior of the air cylinder 210 through multiple bypass pipes 211. The multiple bypass pipes 211 are arranged at intervals along the axial direction of the side pipe 209 to increase the flow area and smooth the air pressure fluctuations in the air cylinder 210.

[0033] It is worth mentioning that a movable piston rod 212 adapted to its inner cavity is slidably connected axially to the top of the air cylinder 210. A sliding seal, such as a sealing ring, is provided between the movable piston rod 212 and the inner wall of the air cylinder 210. The piston end of the movable piston rod 212 inside the air cylinder 210 and the upper space of the air cylinder 210 form a piston pair. A pull handle 214 is rotatably connected to the top of the movable piston rod 212. The pull handle 214 is a rigid rod, and its other end is rotatably connected to one side of the corresponding side belt soft support 200. A return spring 213 is connected between the movable piston rod 212 and the air cylinder 210, and normally holds the movable piston rod 212 in the initial upper position.

[0034] In summary, the telescopic airbag 207, air supply pipe 208, side pipe 209, bypass pipe 211, air cylinder 210, moving piston rod 212, pull handle 214, and return spring 213 together constitute the load-sensing mechanism, i.e., the load-sensing mechanism, which responds to the material pressure on the belt soft support 200 in this embodiment. The above-mentioned air circuit is a closed air circuit, filled with a fixed amount of gas, which can be pre-charged to a set pressure through the inflation port provided on the air circuit. This is a conventional method in the pneumatic field.

[0035] Furthermore, each belt support 200 is equipped with multiple limiting balls 310 on the side near the center of the conveyor belt 104. The limiting balls 310 can be steel balls embedded in the side mounting holes of the belt support 200. The side of the central convex belt 202 facing the belt support 200 has a traction groove 309 extending along the conveying direction, and each limiting ball 310 is slidably disposed in the corresponding traction groove 309. When the belt support 200 flips towards the center of the conveyor belt 104, the limiting balls 310 slide along the traction groove 309, transmitting the flipping motion to the central convex belt 202, causing the center of the conveyor belt 104 to concave synchronously, so that the bearing surface forms a complete and continuous groove shape concave towards the center; on the other hand, it limits and guides the relative movement between the belt support 200 and the central convex belt 202; the rolling friction of the balls is small, the wear is low, and they will not scratch the belt body.

[0036] The conveyor belt 104 has multiple sets of spaced separators arranged along the conveying direction on its conveying surface. Each set of separators includes two symmetrically arranged fixed plates 300. Each fixed plate 300 is fixedly connected to the conveying surface of the conveyor belt 104, using conventional connection methods such as bolt fixing or vulcanization bonding. Each fixed plate 300 has a movable gate 301 slidably connected to its side along the direction of approach or away from the conveying surface. A limit rod 302 is fixedly connected to the movable gate 301, and the limit rod 302 slidably passes through the fixed plate 300, guiding the sliding of the movable gate 301. A sleeve spring 303 is fitted on the outer surface of the limit rod 302. The sleeve spring 303 can be a cylindrical helical compression spring, with its two ends abutting against the fixed plate 300 and the movable gate 301 respectively, used to drive the movable gate 301 to reset relative to the fixed plate 300.

[0037] Furthermore, a displacement connecting rod 305 is connected to the center of the conveying surface of the conveyor belt 104. Adjusting plates 304 are fixedly connected to both sides of the displacement connecting rod 305, and the adjusting plates 304 are located directly below the corresponding movable gate 301. An arc groove 306 is formed on the side of the movable gate 301, and a movable block 307 is slidably connected within the arc groove 306. One end of the adjusting plate 304 is rotatably connected to the movable block 307 via a push handle 308. The arc shape of the arc groove 306 is adapted to the movement trajectory of the movable block 307 when pulled by the push handle 308, so that the pulling force is smoothly converted into a force that pushes the movable gate 301 to slide, avoiding transmission jamming.

[0038] In summary, the fixed plate base 300, the movable gate 301, and the adjusting plate 304 together form a complete baffle structure, which runs synchronously with the conveyor belt 104 and prevents the sesame raw material from sliding down the inclined belt surface during the conveying process. The above-mentioned separator, together with the adjusting linkage assembly composed of the displacement connecting rod 305, the adjusting plate 304, the arc groove 306, the movable block 307, and the push handle 308, constitute the baffle structure of this embodiment.

[0039] Furthermore, a return box 400 is provided at the lower end of the frame 100. The return box 400 is located below the conveyor belt 104, with its top open facing the belt surface. It is used to receive the material discharged and falling from the self-unloading gap. The return box 400 can be fixed to the bottom of the frame 100 by bolts. The material collected in it can be fed back into the feed port 103 to participate in the lifting, realizing the recycling of overloaded materials and avoiding raw material waste and workshop floor pollution.

[0040] Specifically, under normal conveying conditions: the drive motor 106 drives the pulley 105 to rotate, causing the conveyor belt 104 to circulate; the roasted sesame seeds fall onto the belt surface from the feed inlet 103, and the various baffle structures separate and support the material layer along the conveying direction, preventing it from sliding down the inclined surface. The corrugated skirt 107 prevents the material from spilling from both sides, and the material moves up the belt surface to the discharge outlet 102 for discharge. At this time, the material layer thickness is within the rated range, the pressure on the belt soft support 200 is small, the telescopic air bladder 207 only undergoes slight deformation, the air pressure in the upper space of the air cylinder 210 is insufficient to overcome the return spring 213 and push the moving piston rod 212 down, the pull handle 214 does not generate effective pulling force, the two belt soft supports 200 maintain near-horizontal support, and the belt surface is flat; the movable gate 301 is aligned with the fixed plate seat 300 with no unloading gap, and the sleeve spring 303 is in normal condition.

[0041] Uneven material distribution under eccentric loading conditions: When feeding fluctuations cause uneven material distribution on the belt and accumulation on one side, the pressure on the belt support 200 on that side increases. This pressure is transmitted through the rotating shaft 206 to the telescopic air bladder 207. The gas inside the telescopic air bladder 207 enters the upper space of the air cylinder 210 through the air supply pipe 208, side pipe 209, and various bypass pipes 211. The increased air pressure pushes the piston end of the moving piston rod 212 downward against the return spring 213. The downward-moving moving piston rod 212 pulls the corresponding side of the belt support 200 downward via the pull handle 214, causing the belt support 200 to flip closer to the center of the conveyor belt 104. At the same time, the limiting ball 310 slides along the traction groove 309, and the center of the traction conveyor belt 104 is simultaneously lowered. As a result, the side with more material buildup has a larger indentation and tilt angle, and the material slides and gathers towards the center of the belt under the action of gravity; the side with less material buildup has less pressure and less overturning, so the belt surface automatically levels itself and the material layer automatically spreads evenly, achieving uniform material distribution that adapts to the load.

[0042] Overload discharge condition: When the material on the belt surface is overloaded and the central depression continues to increase, the displacement connecting rod 305 moves downward synchronously with the center of the belt surface, pulling the two side adjustment plates 304 to tilt. The other end of the adjustment plate 304 pulls the movable block 307 to slide in the arc groove 306 via the push handle 308, pushing the movable gate plate 301 to overcome the elastic force of the sleeve spring 303 and slide upward relative to the fixed plate seat 300. The fixed plate seat 300 and the movable gate plate 301 gradually form a discharge gap. Excess material slides down from the discharge gap, passes through the belt surface, and falls into the return box 400 below for collection. This process constitutes a mechanical negative feedback regulation: the greater the load, the deeper the depression, the larger the gap, and the faster the discharge, so that the material stuck on the belt is always under control, fundamentally avoiding the overload burnout of the drive motor 106 and the stalling of the conveyor caused by the accumulation of material on the belt.

[0043] Automatic reset mode: As excess material is discharged and the load on the belt surface decreases, the pressure on the belt support 200 decreases, the telescopic air bladder 207 rebounds and extends, and the gas in the air passage flows back from the air cylinder 210 through the bypass pipe 211, the side passage pipe 209, and the air supply pipe 208. At the same time, the reset spring 213 drives the moving piston rod 212 to move upward and reset, and the pull handle 214 is released. Under the tension of the conveyor belt 104 itself and the cooperation of the limiting ball 310 and the traction groove 309, the belt support 200 rotates in the opposite direction to reset, the center depression of the belt surface is restored, the displacement connecting rod 305 moves upward, the adjusting plate 304 returns to its original position, the sleeve spring 303 drives the movable gate 301 to reset along the limiting rod 302 and realign with the fixed plate seat 300, the unloading gap closes, and the conveyor automatically returns to the rated conveying state. This cycle repeats continuously, and the conveyor always operates adaptively and continuously near the rated load.

[0044] In this embodiment, the assembly is performed in the following order: First, the frame 100 is welded, aligned, and positioned; the bracket 101 is fixed with anchor bolts. The bearing seats of the two pulleys 105 are installed, and the annular conveyor belt 104 is fitted. The central convex belt 202, the corrugated skirt 107, and the pre-embedded nut seat are all completed during belt manufacturing. Then, the drive motor 106 is connected to the coupling. The guide frame 204, slide 203, spring plate 205, and tension wheel 201 (including mandrel, roller, and bearing) are pre-assembled into a component and then installed as a whole into the middle section of the frame 100. The air supply pipe 208 is then fitted and secured with clamps. Position the guide frame 204; hoist two belt soft supports 200, connect the lower flange of the telescopic airbag 207 to the end flange of the air supply pipe 208, and hoist the upper end of the soft support back ear plate via the rotating shaft 206; install the side pipe 209, bypass pipe 211, air cylinder 210, moving piston rod 212, return spring 213 and pull handle 214, pre-charge the air circuit and check for leaks; install the fixed plate seat 300, movable gate 301 (including limit rod 302 and sleeve spring 303), displacement connecting rod 305 and adjustment linkage assembly on the belt surface one by one; finally, position the return box 400.

[0045] During commissioning: Check the belt tension and misalignment under no-load conditions. Adjust the preload by finely adjusting the bolts at the spring plate 205 pressure plate. Adjust the air preload pressure via the valve stem and the preload of the return spring 213 via the spring seat nut to set the action threshold of the load-sensing mechanism (higher preload pressure and greater return spring preload require a larger load to trigger the soft support to flip and the unloading gap to open). After setting, tighten the locking nut. The above assembly and commissioning are standard operations in the field of mechanical assembly and can be performed by those skilled in the art based on the description in this embodiment.

[0046] Example 2: This example is based on Example 1, and has the same basic structure, component connection relationship, and working process as Example 1. It is a miniaturized example configured for a small sesame oil production line with a daily processing capacity of approximately 75 tons of sesame seeds and a rated conveying capacity of approximately 5 tons / hour. The difference is: 1. Overall Specifications: The frame angle of 100 is changed to 25°, and the lifting height is approximately 2.5m; the conveyor belt width of 104 is changed to B=400mm, and the belt speed is approximately 0.5m / s; the low-end drive roller is changed to a Φ320mm roller, and the high-end redirecting roller is changed to a Φ280mm roller; the drive motor 106 is changed to a 1.5kW cycloidal pinwheel reducer motor with an output speed of approximately 30r / min, directly connected to the low-end drive roller via a coupling, corresponding to a belt speed of approximately 0.5m / s; the spacing between the separators is changed to 300mm; the height of the corrugated skirt 107 is changed to 60mm; the average material layer under rated working conditions is approximately 12mm.

[0047] 2. Replacement of the elastic biasing component: The spring plate 205 is replaced with an arched spring steel plate, the two ends of which are fixedly connected to the inner top of the guide frame 204 and the top of the slide block 203 by bolts respectively. The steel plate is bent and deformed to apply a continuous biasing force to the slide block 203 toward the return surface of the conveyor belt 104. The tensioning effect is the same as the "fixed at the upper end and pressure at the free end" form of Embodiment 1.

[0048] Replacement of the 3-belt soft support 200: The curved support plate is replaced with a flat support plate, and the support surface is also screwed with an ultra-high molecular weight polyethylene liner.

[0049] Replacement of the 4-center convex belt 202: An NBR convex strip is used, which is clamped to the center of the conveyor belt 104 by a pressure plate and countersunk bolts, making it easy to inspect and replace after wear.

[0050] Replacement of 5 telescopic airbag 207: adopt a double-layer corrugated airbag, increase the compression stroke to about 100mm, and the rest of the air circuit is the same as in Example 1; the bypass pipe 211 is changed to 3 pipes on each side pipe 209.

[0051] The connection between the fixed plate seat 300 and the conveyor belt 104 is changed to integral molding with the belt body through vulcanization, eliminating the bolt embedded parts. The rest of the structure is the same as in Example 1.

[0052] In the above replacements, the tensioning wheel 201 is still assembled in the middle section of the frame 100 via the slide 203 and guide frame 204, with its outer circumferential surface abutting the inner wall of the return surface of the conveyor belt 104; the telescopic airbag 207 is still suspended from the back ear plate of the belt soft support 200 via the rotating shaft 206 and connected to the air cylinder 210 via the air supply pipe 208; the movable gate 301 is still slidably connected to the fixed plate seat 300 via the limit rod 302 and the sleeve spring 303. The assembly position, interaction mode, and process of material being conveyed from the feed port 103 to the discharge port 102 via the belt surface of each replacement component are the same as in Embodiment 1.

[0053] Example 3: This example is based on Example 1, and has the same basic structure, component connection relationship, and working process as Example 1. It is a large-scale example configured for a large sesame oil production line with a daily processing capacity of approximately 300 tons of sesame seeds and a rated conveying capacity of approximately 20 tons / hour. The difference is: 1. Overall Specifications: The tilt angle of the frame 100 is changed to 30°, the lifting height is about 5m, the total length of the frame is about 10.5m, and the support 101 is correspondingly denser; the width of the conveyor belt 104 is changed to B=800mm, and the belt speed is about 0.8m / s; the spacing of the separators is changed to 400mm; the height of the corrugated skirt 107 is changed to 100mm; the average material layer under rated working conditions is about 30mm, and the material layer triggered by overload is about 55mm, which is about 1.7 times the rated value.

[0054] 2. Alternative Drive Arrangement: The drive motor 106 is fixedly connected to the side of the frame 100 near the high end. It is a 4kW cycloidal pinwheel reducer motor with an output speed of approximately 31 r / min. It is directly connected to the high-end pulley 105 via a coupling. The high-end drive roller is a Φ500mm roller, and the low-end redirecting roller is a Φ400mm roller, corresponding to a belt speed of approximately 0.8 m / s. The drive motor 106 is fixed to the side of the frame 100 near the high end, and its output shaft is directly connected to the shaft end of the high-end pulley 105 via a coupling. The high-end pulley 105 is the drive roller, and the low-end pulley 105 is the redirecting roller. Since the material is conveyed from the low end to the high end, the high-end drive can prevent slack side traction on the conveyor belt 104 in the heavy-load section.

[0055] Replacement of tensioning roller 201: The two roller sections are enlarged to Φ280mm×120mm, and the outer circle of the roller is covered with an 8mm thick NBR oil-resistant rubber layer to increase friction with the return surface and reduce belt wear; the through-length mandrel and the air supply pipe 208 coaxially sleeved on the outer surface of the middle section of the mandrel are replaced with a DN100×4 seamless steel pipe with the same structure as in Example 1.

[0056] 4. Replacement of the elastic biasing component: The spring plate 205 is replaced by two 60Si2Mn arc-shaped spring steel plates stacked together, with a thickness of 4mm, a width of 60mm, and an arc height of about 30mm. The upper ends are fixed to the top of the guide frame 204 by a pressure plate, and the free ends press against the top surface of the slide block 203 to meet the tension biasing force required after the bandwidth is increased.

[0057] 5. Enlarged version of the sensing mechanism: The telescopic airbag 207 has a free height of about 400 mm and a compression stroke of about 100 mm; the air cylinder 210 is replaced with a Φ133×5 cylinder; the moving piston rod 212 is replaced with a Φ40 plunger with a stroke of 80 mm; the number of bypass pipes 211 on each side pipe 209 is increased to 5; the air circuit pre-charge pressure is about 0.06 MPa; the pull handle 214 is correspondingly lengthened to 160 mm.

[0058] 6. Enlarged form of traction assembly and central convex belt: The central convex belt 202 is enlarged to 80mm wide and 20mm high, and is still vulcanized with the belt body in one step; the limiting ball 310 is changed to Φ16 steel ball, and the number of balls on each side is increased to 6; the traction groove 309 is correspondingly enlarged to 17mm wide and 8mm deep.

[0059] 7. Enlarged form of the partition structure: The relative sliding stroke of the movable gate 301 is increased to about 40mm; the two limit rods 302 are replaced with Φ10 optical shafts, and each limit rod 302 is fitted with a set of springs 303, with the two sets arranged in parallel to provide sufficient restoring force; the fixed plate seat 300 is still fixed to the belt surface by vulcanized embedded parts and bolts, the same as in Example 1.

[0060] The remaining structural components, such as guide frame 204, slide 203, belt soft support 200, rotating shaft 206, side passage pipe 209, displacement connecting rod 305, adjusting plate 304, arc groove 306, movable block 307, push handle 308, and return box 400, are the same as in Embodiment 1. In the above substitutions, the belt soft support 200 is still connected to the telescopic airbag 207 via the rotating shaft 206 and cooperates with the traction groove 309 via the limiting ball bearing 310; the displacement connecting rod 305 is still connected to the center position of the conveying surface of the conveyor belt 104, and its two side adjusting plates 304 are connected to the movable gate 301 via the push handle 308; the telescopic airbag 207, air supply pipe 208, side passage pipe 209, bypass pipe 211, air cylinder 210, moving piston rod 212, pull handle 214, and return spring 213 still constitute the load-sensing mechanism that responds to the material pressure received by the belt soft support 200. The assembly positions, interaction methods, and material distribution, resetting processes of each component are the same as in Example 1.

[0061] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

Claims

1. A raw material lifting conveyor for sesame oil production, comprising an inclined frame (100), an inlet (103) at the lower end of the frame (100) and an outlet (102) at the upper end, a conveyor belt (104) and a drive mechanism for driving the conveyor belt (104) within the frame (100), characterized in that, Also includes: The tensioning pulley (201) is movably mounted on the frame (100) via an elastic biasing component and abuts against the return surface of the conveyor belt (104) so ​​that the conveying surface of the conveyor belt (104) remains taut. The conveyor belt (104) is provided with a central convex belt (202) at its center position; Two belt supports (200) are both disposed in the annular cavity of the conveyor belt (104) and located on both sides of the central convex belt (202). The belt supports (200) are configured to rotate toward the center of the conveyor belt (104), thereby forming a groove shape that is recessed toward the center on the bearing surface of the conveyor belt (104). The load sensing mechanism includes a telescopic airbag (207) that deforms with the force of the belt soft support (200) and a pull handle (214) connected to the belt soft support (200). The load sensing mechanism is configured to respond to the material pressure on the belt soft support (200) by driving the pull handle (214) through the compression of the telescopic airbag (207) to rotate the belt soft support (200) towards the center. When the material on the conveyor belt (104) is overloaded, the corresponding side of the belt soft support (200) is subjected to increased pressure and tilts towards the center, and the amount of indentation in the center of the conveyor belt (104) increases. A partition structure is provided on the conveying surface of the conveyor belt (104), the partition structure being configured to form a discharge gap for excess material to slide down when the center of the conveyor belt (104) is recessed.

2. The raw material lifting conveyor for sesame oil production according to claim 1, characterized in that, The elastic bias component includes: Guide frame (204), the guide frame (204) is fixed to the frame (100); A slide (203) is slidably mounted inside a guide frame (204); A spring sheet (205) is disposed at the top of the guide frame (204) and abuts against the slide (203); The tensioning wheel (201) is rotatably mounted on the slide (203) and abuts against the inner wall of the return surface of the conveyor belt (104).

3. The raw material lifting conveyor for sesame oil production according to claim 1, characterized in that, The drive mechanism includes: Two pulleys (105) are rotatably connected to the lower end and the upper end of the frame (100), respectively; The conveyor belt (104) is wound around the outer surface of the two pulleys (105); A drive motor (106) is fixedly connected to the frame (100) and is used to drive the pulley (105) to rotate so as to drive the conveyor belt (104) to run in a cycle.

4. The raw material lifting conveyor for sesame oil production according to claim 1, characterized in that, The sensing mechanism also includes an air cylinder (210) and an air passage assembly connecting the telescopic airbag (207) and the air cylinder (210); The telescopic airbags (207) are two in number and are respectively located on both sides of the tensioning wheel (201). The top of each telescopic airbag (207) is rotatably connected to the corresponding side of the belt soft support (200) through a rotating shaft (206). The air circuit assembly includes an air supply pipe (208) sleeved on the outer surface of the tension wheel (201). Both ends of the air supply pipe (208) are respectively connected to the two telescopic air bags (207). A side passage pipe (209) is connected to the side of the air supply pipe (208). The end of the side passage pipe (209) away from the air supply pipe (208) is fixedly connected to the air cylinder (210). The side passage pipe (209) is connected to the interior of the air cylinder (210) through multiple side pipes (211).

5. A raw material lifting conveyor for sesame oil production according to claim 4, characterized in that, The sensing mechanism also includes: The movable piston rod (212) is slidably connected to the top of the air cylinder (210) and is pushed downward by the gas entering the upper space of the air cylinder (210); A pull handle (214) is provided, one end of which is rotatably connected to the top of the movable piston rod (212), and the other end of which is rotatably connected to one side of the corresponding side of the belt soft support (200), so that when the movable piston rod (212) moves down, the belt soft support (200) is pulled to rotate and tilt via the pull handle (214); A reset spring (213) is connected between the movable piston rod (212) and the air cylinder (210) to drive the movable piston rod (212) to reset after it has moved down.

6. A raw material lifting conveyor for sesame oil production according to claim 1, characterized in that, A traction assembly is provided between the belt support (200) and the central convex belt (202), the traction assembly comprising: Multiple limiting balls (310) are provided on one side of each belt support (200) near the center of the conveyor belt (104). A traction groove (309) is provided on the side of the central convex belt (202) for the limiting balls (310) to slide, so that when the belt support (200) rotates and tilts, the limiting balls (310) slide in the traction groove (309) to synchronously pull the center of the conveyor belt (104) into the depression.

7. A raw material lifting conveyor for sesame oil production according to claim 1, characterized in that, The partition structure includes multiple sets of partitions spaced apart along the conveying direction of the conveyor belt (104), each set of partitions including: Two fixed plate seats (300) are symmetrically arranged. Each fixed plate seat (300) is fixedly connected to the conveying surface of the conveyor belt (104). Each fixed plate seat (300) has a movable gate (301) slidably connected to its side along the direction close to or away from the conveying surface. A limiting rod (302) is fixedly connected to the movable gate (301). The limiting rod (302) slides through the fixed plate seat (300). A sleeve spring (303) for driving the movable gate (301) to reset is sleeved on the outer surface of the limiting rod (302).

8. A raw material lifting conveyor for sesame oil production according to claim 7, characterized in that, The partition structure further includes a position adjustment linkage component, which includes: Displacement link (305), the displacement link (305) is connected to the center position of the conveying surface of the conveyor belt (104); Adjustment plate (304), the adjustment plate (304) is fixedly connected to both sides of the displacement connecting rod (305), and the adjustment plate (304) is located directly below the movable gate (301) on the corresponding side; An arc groove (306) is formed on the side of the movable gate (301); Movable block (307), which is slidably connected within the arc groove (306); Push handle (308), one end of the adjusting plate (304) is rotatably connected to the movable block (307) through the push handle (308); The adjustment linkage assembly is configured such that when the center of the conveyor belt (104) is recessed, the displacement link (305) drives the adjustment plate (304) to tilt, and the adjustment plate (304) pulls the movable block (307) to slide in the arc groove (306) via the push handle (308), pushing the movable gate (301) to slide and misalign relative to the fixed plate seat (300) to form a discharge gap between the fixed plate seat (300) and the movable gate (301).

9. A raw material lifting conveyor for sesame oil production according to claim 8, characterized in that: It also includes a return box (400), which is located at the lower end of the frame (100) and below the conveyor belt (104) to receive the material discharged from the unloading gap.

10. A raw material lifting conveyor for sesame oil production according to claim 1, characterized in that: The side of the conveyor belt (104) is fixedly connected with a corrugated skirt (107).

Images