Pipe belt conveyor trestle for lime kiln plant

Abstract

The utility model relates to bulk material conveying technical field, and disclose a kind of pipe belt conveyor trestle for lime kiln workshop, including support block, multiple groups of carrier roller group and belt, the inner cavity surface of support block is equipped with multiple groups of carrier roller support frame, multiple groups of carrier roller group are movably connected in support block by the carrier roller support frame, multiple groups of carrier roller group form annular to limit and guide belt curl into cylindrical, the carrier roller group includes the movable carrier roller located in the lower half portion both sides of support block inboard side.This utility model can make system when detecting material eccentric load, automatically, instantly, convert local pressure into accurate control to the form of bottom carrier roller, so that the movable carrier roller can be transformed into circular truncated cone, provide a deviation correction friction for the belt of deviation side, so as to effectively correct the phenomenon of deviation, guarantee pipe shape stability and sealing, prevent material spillage and equipment abnormal wear caused by deviation.

Description

Technical Field

[0001] This utility model relates to the field of bulk material conveying technology, specifically a pipe belt conveyor trestle for lime kiln workshops. Background Technology

[0002] Tubular belt conveyors, as a high-efficiency and environmentally friendly bulk material conveying equipment, have been widely used in industrial settings such as lime kilns. By rolling a flat conveyor belt into a cylindrical shape, they achieve closed-loop material conveying, effectively solving the dust and material spillage problems associated with traditional trough belt conveyors, and meeting the requirements of modern industry for clean production.

[0003] However, existing technologies still reveal a series of problems and shortcomings that urgently need to be addressed in actual operation, mainly in two aspects: First, the control of tubular stability. Due to uneven material distribution, belt tension fluctuations, or installation errors, existing technologies mostly rely on fixed-position side pressure rollers for limiting movement. However, this passive mechanical limiting cannot adapt to dynamically changing loads. When the side pressure rollers are improperly adjusted or the belt stiffness decreases due to fatigue, belt damage is very likely to occur, leading to seal failure and material leakage. Second, the handling of dynamic load impacts. In the conveying of materials such as limestone, the start-up and shutdown of upstream equipment or the sudden surge of large pieces of material after blockage can cause a sharp change in load, generating a "surge" phenomenon. This severe impact load not only instantly destroys the formed tubular shape, causing the belt to vibrate violently, but also causes periodic impact damage to the idler rollers, bearings, and drive system, significantly shortening the equipment's lifespan. Utility Model Content

[0004] In view of the shortcomings of existing pipe belt conveyors mentioned in the background art, this utility model provides a pipe belt conveyor trestle for lime kiln workshops, which has the advantages of adaptive correction and impact resistance, and solves the technical problems mentioned in the background art.

[0005] This utility model provides the following technical solution: a conveyor bridge for a lime kiln workshop, comprising a support block, multiple sets of idler rollers, and a belt. The inner surface of the support block is provided with multiple sets of idler roller support frames. The multiple sets of idler rollers are movably connected to the support block through the idler roller support frames. The multiple sets of idler rollers form a ring to restrict and guide the belt to curl into a cylindrical shape. Each idler roller set includes movable idler rollers located on both sides of the lower half of the inner side of the support block, and a pivoting idler roller located at the bottom of the inner side of the support block. The idler roller support frames have movable cavities corresponding to the positions of the movable idler rollers, and telescopic pistons that can extend and retract along these cavities are movably sleeved within the movable cavities. A telescopic piston is used to support the movable idler roller; an air chamber is opened on each of the two sides inside the support block, and the top of the air chamber is connected to the movable cavity of the idler roller support frame on the same side; a piston is movably sleeved in the air chamber, and a balance spring for providing a restoring elastic force is fixedly installed on one side of the piston; the idler roller includes a movable rotating shaft and an annular telescopic cylinders disposed at both ends of the movable rotating shaft, and the annular telescopic cylinders are connected to the air chambers through a rotary joint; the annular telescopic cylinders are movably connected to multiple expanding support rings distributed along their circumference, and the outer sides of the multiple sets of expanding support rings jointly support a shaped elastic sleeve shaft.

[0006] Preferably, when the movable idler is subjected to radial pressure, it drives the telescopic piston to contract, compressing the gas in the movable chamber and the air chamber. The compressed gas enters the annular telescopic cylinder on the same side of the idler through the rotary joint, so as to drive the expansion support ring on that side to extend outward, causing the elastic sleeve shaft to partially expand and deform.

[0007] Preferably, when one side of the movable idler is pressed, the shaped elastic sleeve shaft deforms into a frustum shape on the pressed side to provide an increased axial frictional pushing force to the corresponding side of the belt.

[0008] Preferably, when the idler roller is subjected to an impact load from the belt, the expansion support ring can contract to provide elastic cushioning.

[0009] Preferably, when the impact load increases to the point that the expansion support ring contracts significantly, the resulting air pressure can overcome the elastic force of the balance spring on the opposite side and push the piston on the opposite side, thereby pushing the movable roller on the opposite side to move towards the center through the telescopic piston on the opposite side, so as to compress the cylindrical shape formed by the belt.

[0010] Preferably, the idler assembly further includes a fixed idler located on the upper half of the inner side of the support block. The fixed idler is used to assist the belt in forming a cylindrical shape and to press and seal the overlap at the top of the belt.

[0011] Preferably, the balance spring drives the piston to maintain the basic air pressure in the air chamber when there is no external pressure, and keeps the telescopic piston and the expansion support ring in a predetermined initial position.

[0012] This utility model has the following beneficial effects: 1. This utility model, through the linkage design of movable idler, air chamber, piston and rotating idler, enables the system to automatically and instantly convert local pressure into precise control of the bottom idler shape when material is detected to be unbalanced. This allows the rotating idler to transform into a frustum shape, providing a strong, center-directed corrective friction force for the belt on the off-center side, thereby effectively correcting the pipe deviation, ensuring pipe stability and sealing, and preventing material spillage and abnormal equipment wear caused by pipe deviation.

[0013] 2. This invention, through the elastic buffer design of the expanded support ring in the idler roller and its air circuit interconnection with the movable idler rollers on both sides, enables the system to possess a two-stage protection capability against load impacts. The first stage absorbs the kinetic energy of general "surges" through elastic deformation; the second stage, in the event of severe impacts or material jamming, uses pneumatic feedback to drive the idler rollers on both sides to squeeze the belt, thereby loosening the material and clearing blockages. This greatly enhances the system's impact resistance and protects the belt and structure from damage.

[0014] 3. This utility model, through a pure mechanical pneumatic feedback system with a balance spring and interconnected air chamber as its core, enables the entire correction and buffer mechanism to automatically and accurately reset without external commands after action. This not only eliminates expensive sensors and electronic control units, reducing costs and maintenance complexity, but also ensures extremely high reliability and long-term stability in harsh industrial environments such as dust and humidity, achieving true intelligent adaptive control. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the air cavity of the support block of this utility model; Figure 3 This utility model Figure 2 A magnified view of the structure at point A in the middle.

[0016] In the diagram: 1. Support block; 11. Air chamber; 111. Piston; 112. Balance spring; 12. Rotary joint; 13. Expansion support ring; 2. Idler support frame; 21. Telescopic piston; 3. Idler assembly; 31. Movable idler; 32. Rotating idler; 4. Belt. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1 A conveyor bridge for a lime kiln workshop includes a support block 1. Multiple sets of idler roller support frames 2 are provided on the inner surface of the support block 1, and idler roller groups 3 are movably connected to the idler roller support frames 2. The multiple sets of idler roller groups 3 form a ring, and a belt 4 is movably installed in the center of the annular inner cavity formed by the idler roller groups 3. When the belt 4 transports materials, it is constrained by the structure of the multiple sets of idler roller groups 3 and gradually curls to form a cylindrical shape, completely enclosing the material for transport. The idler roller group 3 includes a fixed idler roller located in the upper half of the inner side of the support block 1, which assists the belt 4 in forming a cylinder, and the top overlap is pressed to form a seal. The idler roller group 3 also includes movable idler rollers 31 located on both sides of the lower half of the inner side of the support block 1. Movable cavities are opened in the idler roller support frames 2 at the movable idler rollers 31, and telescopic pistons 21 are movably sleeved through the movable cavities. The telescopic pistons 21 support the movable idler rollers 31 and allow the movable idler rollers 31 to telescopically move along the movable cavities. Openings are provided on both sides inside the support block 1. There is an air chamber 11, the top of which is connected to the movable cavity inside the telescopic piston 21 on the same side. A piston 111 is movably sleeved inside the air chamber 11. A balance spring 112 is fixedly installed on one side of the piston 111. The balance spring 112 pushes the piston 111 to maintain the air pressure inside the air chamber 11, so that the air pressure pushes the telescopic piston 21 to maintain the pushing position of the movable roller 31. The roller group 3 also includes a rotating roller 32 located at the bottom inside the support block 1. The rotating roller 32 includes a movable shaft. Both ends of the movable shaft are provided with annular telescopic cylinders, and multiple expansion support rings 13 are movably connected through the annular telescopic cylinders. The expansion support rings 13 are distributed along the annular telescopic cylinders. The outer side of the multiple sets of expansion support rings 13 movably supports a tangible elastic sleeve shaft. The elastic sleeve shaft is supported by the expansion support rings 13 to form a cylinder coaxial with the movable shaft. The outer side of the annular telescopic cylinder is provided with a communication port, and a rotary joint 12 is movably connected at the communication port. The bottom end of the rotary joint 12 is connected to the air chamber 11.

[0019] Please see Figure 2When the material distribution within the belt 4 is uneven, the heavier material on one side can easily cause the tube center to shift, forming a biased tube. In this device, when the material on one side of the movable idler roller 31 is heavier and subjected to greater pressure, the material presses the telescopic piston 21 on that side to move inward, thereby forming a high pressure in the air chamber 11 on that side, pushing the piston 111 to press the balance spring 112. At this time, the gas on the other side of the piston 111 is pressed into the annular telescopic cylinder through the rotary joint 12, pushing the expansion support ring 13 in the annular telescopic cylinder on that side to extend outward. At this time, the diameter of the support ring formed by the expansion support ring 13 on that side increases, expanding the elastic sleeve shaft on that side of the rotating idler roller 32, causing the elastic sleeve shaft to deform into a frustum shape. During the rotation of the frustum-shaped rotating idler roller 32, a greater frictional pushing force is generated on the side with more material. When the belt 4 is corrected back to the center position, it no longer squeezes the movable idler roller 31 on that side. The balance spring 112 pushes the piston 111 back to the balance position, pushing the movable idler roller 31 to reset, thereby avoiding the biased tube phenomenon caused by the center of gravity shifting on the heavier side.

[0020] Please see Figure 3 When material slides down or gets stuck in the rising section, causing a sudden increase in load, the belt is prone to violent shaking due to the sudden increase in load, thus forming a surge phenomenon that disrupts the stability of the belt. In this device, when material slides down or gets stuck in a section, causing an increase in load, the impact of the material falls onto the support roller 32, first pressing the expansion support rings 13 at both ends of the support roller 32 to contract. This elastic deformation absorbs the impact kinetic energy of the material falling and the increased load, and converts it into slight, high-frequency vibrations to release it, thereby greatly reducing the instantaneous impact force on the belt. When the load changes more significantly due to larger loads or material jamming, the pressure expansion support ring 13 contracts sharply, causing the resulting air pressure to push the piston 111 in the opposite direction against the balance spring 112. At this time, the telescopic pistons 21 on both sides are pushed outward, pushing the movable roller 31 inward. The compression of the movable rollers 31 on both sides causes the annular belt 4 to deform slightly, thereby helping to loosen the jammed material and preventing the material from continuing to jam and causing blockage. After the jammed material is released, the pressure at the rotating roller 32 is normal. At this time, the balance spring 112 drives the piston 111 to return to the balance position, realizing the self-reset of the device.

[0021] The working principle of this utility model is as follows: In operation, the drive unit starts, driving the belt 4 to begin running. Material falls from the feeding point onto the flat belt 4. As the belt 4 moves forward, constrained by the annular channel formed by multiple sets of idler rollers 3, the belt 4 is forcibly curled into a cylindrical shape, completely enclosing the material and conveying it in a sealed manner. At this time, under the preload of the balance spring 112, the piston 111 maintains the basic air pressure in the air chamber 11, causing the telescopic piston 21 to support the movable idler roller 31 in a predetermined initial position. Simultaneously, the expansion support ring 13 of the rotating idler roller 32 also remains in its initial state, ensuring that its outer elastic sleeve is a standard cylindrical shape.

[0022] When the material distribution within belt 4 is uneven, for example, when there is a large accumulation of material on the right side, the right side of belt 4 is compressed due to the increased load, applying a greater radial pressure to the right-side movable idler roller 31. This pressure pushes the right-side telescopic piston 21 to contract into the movable cavity of the idler roller support frame 2. The contraction of the telescopic piston 21 compresses the gas in its movable cavity and the right-side air chamber 11, generating a pressure higher than the system's base air pressure. This high-pressure gas pushes the right-side piston 111 to move and compresses the balance spring 112 on the same side. The compressed high-pressure gas is transported through the rotary joint 12 to the annular telescopic cylinder on the right side of the bottom support idler roller 32. The high-pressure gas pushes the expansion support ring 13 on the right side of the support idler roller 32, causing it to extend outward. This causes the diameter of the elastic sleeve shaft on the right side of the support idler roller 32 to increase, changing its overall shape from a cylinder to a frustum shape with a thicker right side and a thinner left side. When this frustum-shaped support idler roller 32 rotates, it generates a stronger axial frictional pushing force towards the centerline on the belt 4 that is biased to the right. This additional corrective force pushes the material and belt 4 toward the center, thereby correcting the deviation of the tube core and eliminating the "offset tube" phenomenon.

[0023] Once the bias is corrected and the pressure on the right side returns to normal, the compressed balance spring 112 releases its elasticity, pushing the piston 111 back to its original position, pushing the gas back, and driving the entire system, including the telescopic piston 21, the movable roller 31, and the expansion support ring 13, to automatically return to their initial balanced positions.

[0024] When material slides down the rising section or a small amount of material suddenly falls and impacts the bottom support roller 32, the impact force first acts on the expansion support ring 13, causing it to undergo elastic deformation. This deformation process effectively absorbs the impact kinetic energy of the material and converts it into minute high-frequency vibrations and heat energy, thereby significantly reducing the instantaneous impact force transmitted to the belt 4 and the frame, achieving buffering against "surges".

[0025] If the material impact force is enormous or blockage occurs, causing the load to increase rapidly and continuously, the immense pressure on the support roller 32 will force the expansion support ring 13 to contract significantly. This significant contraction of the expansion support ring 13 generates extremely high air pressure within its annular telescopic cylinder. This high-pressure gas, transmitted through the rotary joint 12 and the air passage, overcomes the elastic force of the balance spring 112 within the air chamber 11 on the opposite indirect impact side, pushing the piston 111 on the opposite side to move in the opposite direction. The movement of the piston 111 converts the air pressure into thrust, driving the telescopic piston 21 on the opposite side to push outward. The telescopic piston 21 then pushes the movable roller 31 on the opposite side towards the center of the circular tube formed by the belt 4, subjecting the belt tube to a slight, instantaneous squeezing deformation. This squeezing action can loosen the jammed material, disrupt its stable blockage structure, assist in restoring material flow, and thus clear the blockage.

[0026] Once the impact has passed or the blockage has been cleared, the load returns to normal. Under the restoring force of each balance spring 112, the piston 111, telescopic piston 21, movable idler roller 31, and expansion support ring 13 all automatically reset, and the system returns to the standby balanced state.

[0027] 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.

[0028] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A conveyor bridge for a lime kiln workshop, comprising a support block (1), multiple sets of idler rollers (3), and a belt (4), wherein the inner surface of the support block (1) is provided with multiple sets of idler roller support frames (2), the multiple sets of idler rollers (3) are movably connected to the support block (1) through the idler roller support frames (2), and the multiple sets of idler rollers (3) form a ring to restrict and guide the belt (4) to be rolled into a cylindrical shape, characterized in that: The idler roller assembly (3) includes movable idler rollers (31) located on both sides of the lower half of the inner side of the support block (1), and a rotating idler roller (32) located at the bottom of the inner side of the support block (1); the idler roller support frame (2) has a movable cavity corresponding to the position of the movable idler roller (31), and a telescopic piston (21) that can move along the movable cavity is movably sleeved through the movable cavity. The telescopic piston (21) is used to support the movable idler roller (31); an air chamber (11) is opened on each side inside the support block (1), and the top of the air chamber (11) is connected to the idler roller support frame on the same side. (2) The active chamber is connected; a piston (111) is movably sleeved in the air chamber (11), and a balance spring (112) for providing reset elastic force is fixedly installed on one side of the piston (111); the rotating roller (32) includes a movable shaft and an annular telescopic cylinders set at both ends of the movable shaft. The annular telescopic cylinders are connected to the air chamber (11) through a rotary joint (12); the annular telescopic cylinders are movably connected to a plurality of expansion support rings (13) distributed along its circumference. The outer sides of the plurality of expansion support rings (13) jointly support a shaped elastic sleeve shaft.

2. The pipe belt conveyor trestle for a lime kiln workshop according to claim 1, characterized in that: When the movable roller (31) is subjected to radial pressure, it drives the telescopic piston (21) to contract, compressing the gas in the movable chamber and the air chamber (11). The compressed gas enters the annular telescopic cylinder on the same side of the rotating roller (32) through the rotary joint (12), so as to drive the expansion support ring (13) on that side to extend outward, causing the elastic sleeve shaft to expand and deform locally.

3. The pipe belt conveyor trestle for a lime kiln workshop according to claim 2, characterized in that: When one side of the movable roller (31) is pressed, the shaped elastic sleeve shaft deforms into a frustum shape on the pressed side to provide an increased axial frictional pushing force to the corresponding side of the belt (4).

4. The pipe belt conveyor trestle for a lime kiln workshop according to claim 1, characterized in that: When the idler roller (32) is subjected to an impact load from the belt (4), the expansion support ring (13) can contract to provide elastic cushioning.

5. The pipe conveyor trestle for a lime kiln workshop according to claim 4, characterized in that: When the impact load increases to the point that the expansion support ring (13) contracts significantly, the resulting air pressure can overcome the elastic force of the balance spring (112) on the opposite side and push the piston (111) on the opposite side, which in turn pushes the movable roller (31) on the opposite side to move towards the center through the telescopic piston (21) on the opposite side, so as to squeeze the cylindrical shape formed by the belt (4).

6. The pipe belt conveyor trestle for a lime kiln workshop according to claim 1, characterized in that: The idler group (3) also includes a fixed idler located on the upper half of the inner side of the support block (1). The fixed idler is used to assist the belt (4) in forming a cylindrical shape and to press and seal the overlap at the top of the belt (4).

7. The pipe belt conveyor trestle for a lime kiln workshop according to claim 1, characterized in that: The balance spring (112) drives the piston (111) to maintain the basic air pressure in the air chamber (11) when there is no external pressure, and keeps the telescopic piston (21) and the expansion support ring (13) in a predetermined initial position.

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