A tunnel-type heating conveyor

Abstract

The present application relates to material conveying technical field, specifically to a kind of tunnel type heating conveying equipment, and tunnel type heating conveying equipment includes furnace seat and adjusting mechanism;Furnace seat is provided with conveying belt and roller chain, and conveying belt is formed with closed conveying loop on furnace seat;Roller chain extends along the width direction of conveying belt, and is formed with closed movement loop on furnace seat;Roller chain has a plurality of first and last articulated chain rollers, and chain roller extends along the movement path of roller chain;Each chain roller is all sleeved with deviation correction sleeve, deviation correction sleeve can rotate around its axis, and and conveying belt friction contact;Adjusting mechanism is configured to adjust the distance of roller chain movement in reverse according to the offset of conveying belt.When conveying belt appears offset, through the reverse axial movement of deviation correction sleeve, and under the action of friction force, conveying belt is moved synchronously, deviation correction of conveying belt is realized, so that it can effectively avoid the wear of conveying belt caused by relative sliding, and also can avoid that conveying belt bears high stress for a long time.

Description

A tunnel-type heating conveying equipment Technical Field

[0001] This invention relates to the field of material conveying technology, and in particular to a tunnel-type heated conveying device. Background Technology

[0002] As an indispensable continuous heating equipment in the industrial production field, the core function of the tunnel oven is to achieve baking, drying or curing of various materials by means of the synergistic effect of three heat transfer methods: heat conduction, heat convection and heat radiation. Its application scenarios cover many key areas such as baking and shaping of food ingredients in food processing, drying of moisture in electronic component production, and curing and molding of materials in the chemical industry.

[0003] In the overall operation system of a tunnel furnace, the conveyor belt plays a crucial role in the continuous transport of materials and is a key component ensuring smooth production. However, during actual operation, the conveyor belt is prone to misalignment due to various factors. Once the conveyor belt misaligns, it not only directly affects the stability and accuracy of material transport, leading to deviations in material position and even material falling, thus impacting production efficiency and product quality, but it also exacerbates abnormal friction between the conveyor belt and related equipment components, shortening the conveyor belt's lifespan, increasing equipment maintenance costs and downtime for repairs, and severely affecting the overall operational stability of the tunnel furnace. Therefore, correcting the conveyor belt's misalignment is essential.

[0004] In related technologies, such as Chinese patent CN216735983U, a conveyor belt correction device is disclosed. This device mainly includes a frame, a detection unit, and a correction roller. The detection unit is mounted on the frame to detect the edge of the conveyor belt. The correction roller extends along the width direction of the conveyor belt, with one end hinged to the frame and the other end sliding along the conveying direction of the belt to form a horizontal oscillating motion. When the conveyor belt deviates and is detected by the detection unit, the correction roller oscillates horizontally at a corresponding angle according to the amount of belt deviation. When the correction roller tilts, the direction of the conveyor belt's movement on the correction roller also changes accordingly, thereby achieving correction.

[0005] However, when the aforementioned straightening rollers swing horizontally, they slide relative to the conveyor belt. This sliding friction continuously wears down the conveyor belt, damaging its structural integrity. Furthermore, when the straightening rollers are tilted, they primarily rely on friction to achieve straightening. However, due to material properties, roughness, and environmental factors, the coefficient of friction is low, and the frictional force is limited. To ensure the straightening effect, the tension needs to be increased to enhance friction. This causes the conveyor belt to endure high stress for extended periods, exacerbating its fatigue damage, aging deformation, and increasing pressure on other transmission components, accelerating component wear and affecting the operational stability of the tunnel furnace. Summary of the Invention

[0006] Therefore, it is necessary to provide a tunnel-type heating conveyor system to address the problems of severe conveyor belt wear and short service life caused by current belt alignment equipment in the process of correcting the belt alignment of tunnel furnaces.

[0007] The above objectives are achieved through the following technical solutions:

[0008] A tunnel-type heating and conveying device, the tunnel-type heating and conveying device comprising:

[0009] Furnace base:

[0010] A conveyor belt is provided on the furnace base, and a closed conveying loop is formed on the furnace base;

[0011] A roller chain is disposed on the furnace base and extends along the width direction of the conveyor belt, forming a closed motion loop on the furnace base; the roller chain has multiple chain rollers with hinged ends, the chain rollers extending along the motion path of the roller chain; each chain roller is fitted with a correction sleeve, the correction sleeve being able to rotate around its own axis and being able to make frictional contact with the conveyor belt.

[0012] The adjustment mechanism is configured to adjust the distance the roller chain moves in the opposite direction according to the offset of the conveyor belt, and the greater the offset, the greater the moving distance.

[0013] Furthermore, the adjustment mechanism includes a sensing component and a transmission component. The sensing component includes two sensors, both of which are disposed on the furnace base and spaced apart along the width direction of the conveyor belt, and both are configured to sense the distance the edge of the conveyor belt moves outward. The transmission component includes a driving sprocket, a driven sprocket, and a first driving member, both disposed on the furnace base. The driving sprocket and the driven sprocket are both rotatable around their own axes and both form a transmission engagement with the roller chain. The first driving member is configured to provide the driving force for the rotation of the driving sprocket.

[0014] Furthermore, the sensing element is a photoelectric sensor.

[0015] Furthermore, both ends of the correction sleeve are inclined planes and parallel to each other, and the inclined planes have a near point and a far point; the correction sleeve is divided into two sub-sleeves along its own axis, and the two sub-sleeves of the same correction sleeve form a rotatable connection; the tunnel-type heating conveying equipment also includes an adjustment component, which is configured to, before the correction sleeve and the conveyor belt form a friction fit, arrange the near point and the far point of the inclined plane of the correction sleeve on the side close to the conveyor belt at intervals along a direction perpendicular to the conveyor belt surface, and the near point is closer to the conveyor belt surface than the far point.

[0016] Furthermore, the positioning assembly includes a reset sleeve disposed on the furnace base; the roller chain passes through the reset sleeve; a plurality of first magnets are inserted into the side wall of the reset sleeve, the plurality of first magnets are arranged circumferentially, and the magnetic polarities of the first magnets located in one semicircle and the first magnets located in the other semicircle are opposite; a plurality of second magnets are inserted into the side wall of each of the sub-sleeves, the plurality of second magnets are arranged circumferentially, and the magnetic polarities of the second magnets located in one semicircle and the second magnets located in the other semicircle are opposite.

[0017] Furthermore, the roller chain can slide in a direction perpendicular to the conveyor belt surface to tension the conveyor belt; each of the chain rollers is provided with a blocking part at its hinge, the blocking part being configured to limit the included angle between two adjacent chain rollers and to prevent two adjacent chain rollers from folding outwards.

[0018] Furthermore, the tunnel-type heating conveyor also includes a second drive unit configured to provide a driving force for the sliding of the roller chain.

[0019] Furthermore, there are two roller chains, which are symmetrically arranged about the conveyor belt and move in opposite directions; the correction sleeve can slide along its own axis and initially forms a stop with the chain roller.

[0020] Furthermore, the tunnel-type heated conveyor also includes a drive assembly configured to provide driving force for the movement of the conveyor belt.

[0021] Furthermore, the drive assembly includes a drive roller, a driven roller, and a third drive member, all of which are disposed on the furnace base. The drive roller and the driven roller are both rotatable about their own axes and are in transmission engagement with the conveyor belt. The third drive member is configured to provide the drive force for the rotation of the drive roller.

[0022] The beneficial effects of this invention are:

[0023] This invention relates to a tunnel-type heating and conveying equipment. It incorporates a roller chain and an adjusting mechanism, with a correction sleeve rotatably fitted onto each roller of the roller chain. When the conveyor belt deviates, the adjusting mechanism drives the roller chain to move in the opposite direction. Simultaneously, the friction between the correction sleeve and the conveyor belt causes the conveyor belt to move in the opposite direction, thus correcting the deviation. This avoids sliding wear on the conveyor belt caused by relative sliding between the correction sleeve and the conveyor belt, while ensuring that most of the friction between the correction sleeve and the conveyor belt is used to drive the conveyor belt's movement. This reduces the required tension on the conveyor belt, preventing it from bearing high stress for extended periods. This extends the conveyor belt's service life, reduces pressure between the conveyor belt and other transmission components, decreases wear on other transmission components, and improves the operational stability of the tunnel furnace.

[0024] Furthermore, by setting up an adjustment component and utilizing the structural characteristics of the correction sleeve, which has two inclined surfaces that are parallel to each other and is divided into two rotating sleeves along its own axis, the position of the adjacent chain roller gap and the corresponding position of the conveyor belt can be switched during the movement of the conveyor belt, thus ensuring the tension effect of the conveyor belt.

[0025] Furthermore, by setting two roller chains with opposite rotation directions, the two roller chains can correct the conveyor belt in two directions respectively, thereby making the usage of each correction sleeve nearly consistent and improving utilization. Attached Figure Description

[0026] Figure 1 is a three-dimensional structural schematic diagram of the tunnel-type heating and conveying equipment provided in an embodiment of the present invention;

[0027] Figure 2 is a three-dimensional structural diagram of a tunnel heating and conveying device without a furnace base provided in an embodiment of the present invention;

[0028] Figure 3 is a front view of the tunnel heating and conveying device without the furnace base provided in an embodiment of the present invention.

[0029] Figure 4 is a front view structural schematic diagram of a tunnel heating and conveying device without furnace base, conveyor belt and drive assembly provided in an embodiment of the present invention;

[0030] Figure 5 is an exploded view of some parts of the tunnel heating and conveying equipment provided in an embodiment of the present invention, with the furnace base, conveyor belt and drive assembly removed.

[0031] Figure 6 is a side view of a portion of the structure of the tunnel heating and conveying equipment provided in an embodiment of the present invention, with the furnace base, conveyor belt and drive assembly removed.

[0032] Figure 7 is a cross-sectional view along direction AA in Figure 6;

[0033] Figure 8 is a magnified view of the structure at point Z in Figure 7;

[0034] Figure 9 is a three-dimensional structural diagram of the tunnel heating conveyor provided in the embodiment of the present invention when the two chain rollers, two correction sleeves and two connecting sections are assembled.

[0035] Figure 10 is an exploded view of the two chain rollers, two correction sleeves and one connecting section of the tunnel heating conveying device provided in the embodiment of the present invention;

[0036] Figure 11 is a cross-sectional view of the tunnel heating conveyor provided in an embodiment of the present invention, showing the assembly of two chain rollers, two correction sleeves and a connecting section.

[0037] Figure 12 is a cross-sectional view of the correction sleeve of the tunnel heating and conveying equipment provided in an embodiment of the present invention.

[0038] in:

[0039] 1. Furnace base;

[0040] 2. Conveyor belt;

[0041] 3. Roller chain; 301. Chain roller; 3011. Blocking part; 3012. Slide groove; 302. Connecting section;

[0042] 4. Correction sleeve; 401. Near point; 402. Far point; 403. Original center plane; 404. Split sleeve; 4041. Insert ring; 405. Slider;

[0043] 502, Transmission assembly; 5021, Drive sprocket; 50211, First clamping plate; 5022, Driven sprocket; 50221, Second clamping plate;

[0044] 6. Positioning assembly; 601. Reset sleeve;

[0045] 7. Second drive cylinder;

[0046] 8. Drive assembly; 801. Drive roller; 802. Driven roller;

[0047] 9. Base;

[0048] 10. Rotating shaft;

[0049] 11. Reversing roller. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0051] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage," unless otherwise specified, include both direct and indirect connections (linkages). In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0052] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0053] The tunnel heating conveying equipment provided by the embodiments of the present invention will be described below with reference to Figures 1 to 12. It is particularly suitable for conveying materials that need to be heated by a tunnel furnace.

[0054] Specifically, the tunnel-type heating and conveying equipment is configured to include a furnace base 1; a conveyor belt 2 is provided on the furnace base 1. The conveyor belt 2 has a ring structure and extends horizontally in the front-to-back direction. The belt surface of the conveyor belt 2 is set horizontally to facilitate the carrying of materials. The conveyor belt 2 forms a closed conveying loop on the furnace base 1 to facilitate the conveying of materials. To provide the driving force for the movement of the conveyor belt 2, the tunnel heating conveyor equipment is further configured to include a drive assembly 8. The drive assembly 8 includes a drive roller 801, a driven roller 802, and a third drive component, all of which are mounted on the furnace base 1. The drive roller 801 and the driven roller 802 extend horizontally in the left-right direction and are arranged at intervals in the front-back direction, and are both located on the inner side of the conveyor belt 2. The drive roller 801 and the driven roller 802 respectively form frictional contact with the inner belt surfaces at the front and rear ends of the conveyor belt 2. The third drive component can be configured as a second drive motor. The motor shaft of the second drive motor is coaxial and fixedly inserted into the drive roller 801, which facilitates the rotation of the drive roller 801. When the drive roller 801 rotates, the driven roller 802 follows, driving the conveyor belt 2 to form a closed conveying loop.

[0055] To achieve tensioning of the conveyor belt 2, a tensioning roller is also provided on the furnace base 1. The tensioning roller extends horizontally in the left-right direction and can rotate around its own axis. It is located inside the conveyor belt 2 and is in frictional contact with the inner surface of the conveyor belt 2. It can also slide in a direction perpendicular to the surface of the conveyor belt 2 to tension the conveyor belt 2. To facilitate the provision of driving force for the sliding of the tensioning roller, a fourth driving component is also provided on the furnace base 1. The fourth driving component can be set as a first driving cylinder. The output shaft of the first driving cylinder extends in a direction perpendicular to the surface of the conveyor belt 2 and is rotatably sleeved on the tensioning roller, ensuring that the tensioning roller can be driven to slide in a direction perpendicular to the surface of the conveyor belt 2 while avoiding affecting the rotation of the tensioning roller.

[0056] Understandably, the first drive cylinder can be any of a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder.

[0057] During the operation of conveyor belt 2, it is highly susceptible to deviation due to the following factors: deviations in the dimensional accuracy of conveyor belt 2 during manufacturing; misalignment with the overall structure of the tunnel furnace during installation; deformation of conveyor belt 2 due to continuous stress and temperature changes during long-term use; and stress imbalance caused by uneven distribution of conveyed materials. These factors can all cause conveyor belt 2 to deviate from the preset conveying path. Once conveyor belt 2 deviates, it not only directly affects the stability and accuracy of material conveying, leading to material position deviations and even material falling, thus impacting production efficiency and product quality, but also exacerbates abnormal friction between conveyor belt 2 and related equipment components, shortening its service life, increasing equipment maintenance costs and downtime frequency, and severely affecting the overall operational stability of the tunnel furnace. Therefore, designing and applying an effective deviation correction device for conveyor belt 2 to promptly correct its deviation is of great significance for ensuring the normal operation of the tunnel furnace, improving production efficiency, and reducing equipment wear.

[0058] To correct the deviation of the conveyor belt 2, a correction roller is also provided on the furnace base 1. The correction roller extends horizontally in the front-to-back direction and can rotate around its own axis. It is located inside the conveyor belt 2 and makes frictional contact with the inner surface of the conveyor belt 2. The right end of the correction roller is hinged to the furnace base 1, and the left end is a free end, so that the correction roller can swing horizontally around the hinge point.

[0059] During use, when the conveyor belt 2 deviates, the correction roller swings horizontally at a corresponding angle according to the amount of deviation of the conveyor belt 2; when the correction roller tilts, the direction of movement of the conveyor belt 2 on the correction roller also changes accordingly, thereby achieving correction.

[0060] While the above process can correct the deviation of conveyor belt 2, the linear velocity direction at different positions on the surface of the correction roller differs from the running direction of conveyor belt 2 during its oscillation. Conveyor belt 2, while moving with the correction roller, must also maintain its original conveying direction. This inconsistency in movement direction directly leads to sliding friction between the two. Long-term relative sliding will continuously wear down the bottom surface of conveyor belt 2, damaging its structural integrity. This wear is particularly severe for conveyor belts made of softer materials or with special coatings, significantly shortening their service life and increasing the frequency and cost of equipment maintenance and replacement.

[0061] Meanwhile, after the straightening roller completes its horizontal swing and is in an inclined position, its corrective force on the conveyor belt 2 mainly depends on the frictional force generated between them. After the straightening roller tilts, its supporting force and frictional force on the conveyor belt 2 can be decomposed into components along the conveying direction of the conveyor belt 2 and perpendicular to the conveying direction. The frictional component perpendicular to the conveying direction is the key force for correcting the conveyor belt 2's deviation. However, in actual operation, due to the material properties and surface roughness of the conveyor belt 2 and the straightening roller, as well as factors such as dust and humidity in the operating environment, the coefficient of friction between them is usually small, resulting in a relatively limited frictional force. To ensure that the frictional force is strong enough to effectively correct the conveyor belt 2's deviation, it is necessary to increase the tension between the conveyor belt 2 and the straightening roller to increase the frictional force, thereby increasing the frictional force. However, excessive tension will keep the conveyor belt 2 in a high-stress state for a long time. On the one hand, it will aggravate the fatigue damage of the conveyor belt 2 itself and accelerate the aging and deformation of the conveyor belt 2. On the other hand, it will increase the pressure between the conveyor belt 2 and other transmission components of the equipment, leading to increased wear of the transmission components. This will not only further shorten the service life of the conveyor belt 2, but may also cause failure of the equipment transmission system, affecting the overall stability and reliability of the tunnel furnace operation.

[0062] Based on this, in the tunnel heating and conveying equipment provided in this embodiment of the invention, a roller chain 3 is used instead of a correction roller. The roller chain 3 has a ring structure and is set on the furnace base 1, extending horizontally in the left and right directions. At the same time, a closed motion loop is formed on the furnace base 1 to facilitate the correction of the conveyor belt 2. The roller chain 3 has multiple spaced chain rollers 301, which extend along the motion path of the roller chain 3. Connecting joints 302 are hinged between adjacent chain rollers 301, so that adjacent chain rollers 301 are hinged end to end. Each chain roller 301 is fitted with a correction sleeve 4, which can rotate around its own axis and can make frictional contact with the conveyor belt 2. The tunnel heating and conveying equipment also includes an adjustment mechanism, which is configured to adjust the distance of movement of the roller chain 3 in the opposite direction according to the offset of the conveyor belt 2. The larger the offset, the greater the movement distance.

[0063] Thus, when conveyor belt 2 deviates to the left, the adjusting mechanism drives the roller chain 3 to move to the right. Simultaneously, the friction between the correcting sleeve 4 and the conveyor belt 2 drives the conveyor belt 2 to move to the right. The greater the deviation of the conveyor belt 2, the greater the movement distance of the roller chain 3, thus achieving correction. Similarly, when conveyor belt 2 deviates to the right, the adjusting mechanism drives the roller chain 3 to move to the left. Simultaneously, the friction between the correcting sleeve 4 and the conveyor belt 2 drives the conveyor belt 2 to move to the left. The greater the deviation of the conveyor belt 2, the greater the movement distance of the roller chain 3, thus achieving correction.

[0064] This ensures that the direction of movement of the correction sleeve 4 along the roller chain 3 is completely consistent with the direction of offset that the conveyor belt 2 needs to correct, and their movement trends on the contact surface are synchronized: the movement of the roller chain 3 is transmitted to the conveyor belt 2 through the static friction between the correction sleeve 4 and the conveyor belt 2, driving the conveyor belt 2 back to the preset path, rather than causing slippage by forcibly changing direction. This synchronous movement correction method ensures that the correction sleeve 4 and the conveyor belt 2 are always dominated by static friction, with almost no relative slippage, thus avoiding wear on the surface and internal structure of the conveyor belt 2 from the source. It is especially suitable for conveyor belts 2 with special coatings or softer materials, effectively maintaining their structural integrity.

[0065] Meanwhile, the friction contact point between the correction sleeve 4 and the conveyor belt 2 is always aligned with the direction of movement of the roller chain 3. In this case, the frictional force does not need to be decomposed into multiple components; instead, most of it is directly converted into an effective force to drive the conveyor belt 2 to correct its deviation. The static friction-based action mode itself has higher force transmission efficiency. The frictional force required for the same correction effect is significantly lower than that of the traditional sliding friction mode, indirectly reducing the tension load on the conveyor belt 2, preventing it from bearing high stress for extended periods, and delaying fatigue damage and aging.

[0066] By reducing the tension requirement of conveyor belt 2, the stress burden on the transmission components is indirectly alleviated: on the one hand, the contact pressure between conveyor belt 2 and the drive roller 801 and driven roller 802 returns to a reasonable range, avoiding component wear caused by excessive compression; on the other hand, there is no additional forced force during the correction process (such as the lateral impact force when the correction roller swings), resulting in a more balanced overall stress on the equipment and a more stable operating load on the transmission system. This low-stress operating state not only extends the service life of conveyor belt 2 but also simultaneously reduces the maintenance frequency and failure risk of core transmission components such as drive roller 801 and driven roller 802, thereby improving the overall operational stability and long-term effectiveness of the tunnel-type heating conveyor equipment.

[0067] Furthermore, the adjustment mechanism is configured to include a sensing component and a transmission component 502. The sensing component includes two sensors, both of which are mounted on the furnace base 1 and arranged horizontally at intervals in the left-right direction, located on the left and right sides of the conveyor belt 2 respectively. Both sensors are configured to sense the distance the conveyor belt 2's edge moves outward. The sensors can be photoelectric sensors. Two bases 9 are mounted on the furnace base 1, arranged horizontally at intervals in the left-right direction, located on the left and right sides of the conveyor belt 2 respectively. Each base 9 has a rotating shaft 10 rotatably mounted on it. The transmission component 502 includes a drive sprocket 5021, a driven sprocket 5022, and a first drive component. The first drive component is inserted into one of the bases 9. The first drive component can be a first drive motor, and the first drive motor and the rotating shaft 10 on the base 9 are coaxial and fixedly connected. The drive sprocket 5021 is a columnar structure with a regular hexagonal cross-section. During installation, it is fitted onto the rotating shaft 10 on the base 9, which is equipped with the first drive motor, and forms a spline fit with the rotating shaft 10 to ensure that it can be driven to rotate by the first drive motor. The drive sprocket 5021 is located inside the roller chain 3 and is in frictional contact with the four correction sleeves 4. The driven sprocket 5022 is a columnar structure with a regular hexagonal cross-section. During installation, it is fitted onto the rotating shaft 10 on another base 9 and forms a spline fit with the rotating shaft 10. The driven sprocket 5022 is located inside the roller chain 3 and is in frictional contact with the four correction sleeves 4. When the drive sprocket 5021 rotates, the driven sprocket 5022 follows, so that the roller chain 3 forms a closed motion loop.

[0068] Understandably, to prevent the roller chain 3 from twisting, first clamping plates 50211 are vertically fixed at both ends of the drive sprocket 5021. The first clamping plates 50211 clamp the correction sleeve 4 in the middle, thereby preventing the roller chain 3 from twisting by limiting the correction sleeve 4. Second clamping plates 50221 are vertically fixed at both ends of the driven sprocket 5022. The two second clamping plates 50221 clamp the correction sleeve 4 in the middle, thereby preventing the roller chain 3 from twisting by limiting the correction sleeve 4.

[0069] During use, when the conveyor belt 2 shifts to the left, the photoelectric sensor on the left side senses the shift of the conveyor belt 2. Then, the first drive motor is started. According to the shift of the conveyor belt 2 sensed by the photoelectric sensor on the left side, the first drive motor drives its motor shaft to rotate a preset number of times, which synchronously drives the drive sprocket 5021 to rotate. Under the follow-up of the driven sprocket 5022, the roller chain 3 moves to the right a preset distance. Simultaneously, through the frictional cooperation between the correction sleeve 4 and the conveyor belt 2, the conveyor belt 2 is driven to move to the right a preset distance, thus achieving correction.

[0070] Similarly, when the conveyor belt 2 deviates to the right, the photoelectric sensor on the right side senses the amount of deviation of the conveyor belt 2; then the first drive motor is started. According to the amount of deviation of the conveyor belt 2 sensed by the photoelectric sensor on the right side, the first drive motor drives its motor shaft to rotate a preset number of revolutions, and synchronously drives the drive sprocket 5021 to rotate. Under the follow-up of the driven sprocket 5022, the roller chain 3 moves to the left a preset distance. Simultaneously, through the frictional cooperation between the correction sleeve 4 and the conveyor belt 2, the conveyor belt 2 is driven to move to the left a preset distance, thereby achieving deviation correction.

[0071] In other embodiments, the sensing element can also be either a laser sensor or an infrared sensor. Taking an infrared sensor as an example, the infrared sensor has a transmitter and a receiver, wherein the transmitter is used to emit infrared light and the receiver is used to receive infrared light. During installation, the transmitter and receiver of the same infrared sensor are placed on the upper and lower sides of the conveyor belt 2 respectively, so as to determine the offset of the conveyor belt 2 based on the amount of infrared light blocked by the conveyor belt 2.

[0072] In other embodiments, to improve the reliability of the correction sleeve 4 during correction, both ends of the correction sleeve 4 are set to be inclined planes and parallel to each other. A preset angle is formed between the inclined plane and the axis of the correction sleeve 4, which is not equal to 90 degrees. The inclined plane has a near point 401 and a far point 402, which are arranged opposite to each other. The near point 401 is the point on the inclined plane with the shortest distance to the original center plane 403 of the correction sleeve 4, and the far point 402 is the point on the inclined plane with the farthest distance to the original center plane 403 of the correction sleeve 4. The correction sleeve 4 is divided into two sub-sleeves 404 along its own axis. In the same correction sleeve 4, a retaining ring 4041 is vertically arranged on the end face of the first sub-sleeve 404 facing the second sub-sleeve 404. The insert ring 4041 and the sleeve 404 are coaxially arranged and have a T-shaped cross-section. An annular slot is provided on the end face of the second sleeve 404 facing the first sleeve 404. The slot is coaxially arranged and has a T-shaped cross-section. The insert ring 4041 is rotatably inserted into the slot during installation, so that the two sleeves 404 of the same correction sleeve 4 form a rotatable connection. The tunnel heating conveying equipment also includes an adjustment component 6. The adjustment component 6 is configured to form a near point 401 and a far point 402 on the inclined surface of the correction sleeve 4 near the conveyor belt 2 before the correction sleeve 4 and the conveyor belt 2 form a friction fit. The near point 401 is closer to the surface of the conveyor belt 2 than the far point 402.

[0073] Thus, when the conveyor belt 2 is running, its bottom surface maintains frictional contact with the lower correction sleeve 4. Under the action of friction, the conveyor belt 2 can synchronously drive the contacting correction sleeve 4 to rotate around its own axis. During this process, the rotation direction of the correction sleeve 4 is matched with the conveying direction of the conveyor belt 2, forming a stable linkage relationship in which the conveyor belt 2 drives the correction sleeve 4 to rotate.

[0074] For the two alignment sleeves 4 closest to the conveyor belt 2 but not in direct contact, as the conveyor belt 2 runs, when the alignment sleeve 4 that is in contact with the conveyor belt 2 rotates to a specific angle, the far point 402 of its inclined surface will form a stop engagement with the inclined surfaces of the two non-contact alignment sleeves 4. At this time, the rotational torque of the alignment sleeve 4 that is in contact is transmitted to the non-contact alignment sleeves 4 through the stop action. However, since the alignment sleeve 4 is divided into two rotatably connected sub-sleeves 404 along its own axis, only the sub-sleeve 404 on the side of the non-contact alignment sleeves 4 closest to the conveyor belt 2 will rotate, while the other sub-sleeve 404 remains stationary. This avoids the torque being transmitted to the other non-contact alignment sleeves 4. If the two sub-sleeves 404 are fixedly connected, the rotation of the alignment sleeve 4 that is in contact will drive the alignment sleeves 4 on the entire roller chain 3 to rotate synchronously, causing a large number of non-contact alignment sleeves 4 to idle, which not only generates ineffective frictional loss, but may also cause the roller chain 3 to twist due to the asynchronous rotation of multiple alignment sleeves 4. The rotation of the single-sided sleeve 404 allows the sleeve 404 that is about to come into contact with the conveyor belt 2 to enter the adaptation rotation state in advance, which not only prepares for subsequent contact with the conveyor belt 2, but also avoids unnecessary friction loss, and indirectly reduces the impact and wear when the conveyor belt 2 comes into contact with the correction sleeve 4.

[0075] Furthermore, when the conveyor belt 2 deviates, and the adjusting mechanism drives the roller chain 3 to move in the opposite direction, the pre-rotated sleeve 404, which is closer to the conveyor belt 2, has its rotation direction matched with the deviation correction direction of the conveyor belt 2. The rotation trend of the sleeve 404 is consistent with the movement trend of the conveyor belt 2 to return to the preset path. When the two come into contact, they can quickly form a stable static friction fit, rather than sliding friction caused by the conflict of rotation directions. This pre-fitted rotation state ensures that the correction sleeve 4 and the conveyor belt 2 always have static friction as the main force during the correction process, fundamentally reducing the wear of the conveyor belt 2 surface caused by relative sliding, which is especially suitable for conveyor belt types with easily damaged surfaces.

[0076] Furthermore, during the operation of conveyor belt 2, as shown in Figure 11, if a deviation occurs (such as a deviation to the left), the edge on the deviation side may curl inward due to being suspended (detached from the original support structure). This curling will increase the thickness of the edge of conveyor belt 2, which will not only damage the flatness of the conveyor belt 2 surface, but also prevent the curled area from effectively contacting the correction sleeve 4, thereby affecting the transmission of the correction force. In some cases, the uneven force at the curled edge may even exacerbate the further deviation of conveyor belt 2, thus disrupting the overall tension balance.

[0077] In this device, the two ends of the correction sleeve 4 are designed as parallel inclined surfaces. Through the adjustment component 6, before the correction sleeve 4 forms a frictional engagement with the conveyor belt 2, the inclined surfaces are kept such that the closer point 401 is closer to the surface of the conveyor belt 2 than the farther point 402. When the conveyor belt 2 shifts to the left and its edges curl, the adjustment mechanism drives the roller chain 3 to move to the right. At this time, the left edge of the conveyor belt 2 will contact the inclined surface of the left correction sleeve 4 before the farther point 402 of the lower correction sleeve 4 engages with the stop of the left correction sleeve 4.

[0078] Because the inclined plane has a near point 401 away from the conveyor belt 2 and a far point 402 close to the conveyor belt 2, the curled edge of the conveyor belt 2 will be lifted upward under the guidance of the inclined plane: the curled area slides along the inclined plane from the far point 402 to the near point 401, gradually unfolds and restores the flatness of the belt surface, and finally forms a complete frictional contact with the cylindrical surface of the correction sleeve 4. This process not only solves the problem of poor contact caused by the curled edge, but also ensures that the correction force can be evenly transmitted to the edge of the conveyor belt 2, avoiding the influence of insufficient local force on the correction effect.

[0079] Meanwhile, the presence of the inclined structure can also optimize the compatibility of the gap between the conveyor belt 2 and the chain roller 301: when the conveyor belt 2 drives the correction sleeve 4 to rotate, the gap between the adjacent chain rollers 301 will continuously switch with the rotation of the correction sleeve 4 and the corresponding position of the conveyor belt 2. The support gap that may exist due to the gap will be filled by the dynamic contact of the inclined surface, so that the conveyor belt 2 is always in a continuous support state in which part of the area is in contact with the cylindrical surface of the correction sleeve 4 and part of the area is in transition with the inclined surface of the adjacent correction sleeve 4. This avoids the local sagging of the conveyor belt 2 due to the gap, thereby ensuring the overall tension balance of the conveyor belt 2 and maintaining a stable conveying posture.

[0080] Furthermore, the positioning component 6 is configured to include a reset sleeve 601, which is fixed on the inner wall of the base 9 located behind the roller chain 3 in the direction of movement and extends horizontally in the left and right directions; the roller chain 3 can pass through the reset sleeve 601 during movement; a plurality of first magnets are inserted into the side wall of the reset sleeve 601, the plurality of first magnets are arranged circumferentially, and the magnetic pole polarity of the first magnet in one semicircle is N, and the magnetic pole polarity of the first magnet in the other semicircle is S; a plurality of second magnets are inserted into the side wall of each sub-sleeve 404, the plurality of second magnets are arranged circumferentially, and the magnetic pole polarity of the second magnet in one semicircle is N, corresponding to the near point 401, and the magnetic pole polarity of the second magnet in the other semicircle is S, corresponding to the far point 402.

[0081] During use, when the roller chain 3 passes through the reset sleeve 601, the magnetic cooperation of the first magnet and the second magnet causes the sleeve 404 to rotate. Before the correction sleeve 4 and the conveyor belt 2 form a frictional fit, the correction sleeve 4 is arranged with a near point 401 and a far point 402 on the inclined surface of the conveyor belt 2 at intervals in a direction perpendicular to the surface of the conveyor belt 2. The near point 401 is closer to the surface of the conveyor belt 2 than the far point 402, ensuring the guiding effect of the correction sleeve 4 on the inclined surface of the conveyor belt 2 on the edge curling of the conveyor belt 2.

[0082] In a further embodiment, each base 9 may be provided with a reset sleeve 601 on its inner sidewall, and each reset sleeve 601 may be fitted with a plurality of first magnets, so that the rotational posture of the correction sleeve 4 can be guided before and after the correction sleeve 4 and the conveyor belt 2 form a frictional engagement.

[0083] In other embodiments, to simplify the structure, the two bases 9 are configured to slide simultaneously in a direction perpendicular to the surface of the conveyor belt 2, thereby driving the roller chain 3 to slide in a direction perpendicular to the surface of the conveyor belt 2. The roller chain 3 synchronously drives the conveyor belt 2 to move through the correction sleeve 4, thereby tensioning the conveyor belt 2. At this time, the function of the roller chain 3 is the same as that of the tensioning roller, so the tensioning roller can be omitted, thereby simplifying the structure. To provide the driving force for the sliding of the bases 9, the tunnel heating conveying equipment also includes a second driving component, which is a second driving cylinder 7. There are two second driving cylinders 7, both of which are set on the furnace base 1. The output shaft of the second driving cylinder 7 extends in a direction perpendicular to the surface of the conveyor belt 2 and is fixed on the two bases 9 respectively, thereby driving the bases 9 to slide in a direction perpendicular to the surface of the conveyor belt 2. To ensure the tensioning effect of the roller chain 3, a blocking part 3011 is provided at the hinge of each roller 301. The blocking part 3011 is a plate-shaped structure that extends in a direction parallel to the axis of the roller 301 and is located outside the connecting section 302. It can also form a stop engagement with the connecting section 302, thereby limiting the included angle between two adjacent rollers 301. The included angle between two adjacent rollers 301 is limited to a maximum of 180 degrees and can only be folded inwards, with the included angle decreasing. This ensures that it can form a transmission engagement with the driving sprocket 5021 and the driven sprocket 5022, but cannot be folded outwards. This prevents the two adjacent rollers 301 from folding outwards under the pressure of the conveyor belt 2 when tensioning the conveyor belt 2, which would affect the tensioning effect of the conveyor belt 2.

[0084] It is understandable that the second drive cylinder 7 can be configured as any one of a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder.

[0085] In other embodiments, to improve the utilization rate of the correction sleeve 4, two reversing rollers 11 are provided on the furnace base 1. The reversing rollers 11 extend horizontally in the left-right direction. The two reversing rollers 11 are arranged at intervals in the front-back direction and are both located between the driving roller 801 and the driven roller 802. They are symmetrically arranged about the conveyor belt 2. Both reversing rollers 11 can rotate around their own axis and are both located below the lower conveyor belt 2. They both lift the lower conveyor belt 2 upwards, so that the lifted part of the conveyor belt 2 forms an inverted U-shaped structure. The two reversing rollers 11 simultaneously form frictional contact with the conveyor belt 2, avoiding wear of the conveyor belt 2 due to relative sliding. There are two roller chains 3. Both roller chains 3 are located below the lower conveyor belt 2 and are respectively located at the two corners of the inverted U-shaped structure. They are both inclined and symmetrically arranged about the conveyor belt 2, forming a figure-eight structure with the larger opening facing the conveyor belt 2. The upper part is configured as follows: A groove 3012 is provided on the circumferential side wall of the chain roller 301. The groove 3012 is annular and coaxial with the chain roller 301, extending along the axial direction of the chain roller 301. A slider 405 is provided on the inner circumferential wall of the correction sleeve 4. The slider 405 is annular and coaxial with the correction sleeve 4, and is slidably inserted into the groove 3012. Under the sliding cooperation of the slider 405 and the groove 3012, the correction sleeve 4 can slide along its own axial direction. Initially, the slider 405 is located at the limit position of the groove 3012, so that the chain roller 301 of the roller chain 3 used for correction can synchronously drive the correction sleeve 4 to move synchronously, which facilitates synchronously driving the conveyor belt 2 to move and realize correction. For the other roller chain 3, during the correction process of the conveyor belt 2, the correction sleeve 4 can slide axially relative to the chain roller 301 under the drive of the conveyor belt 2, avoiding relative sliding.

[0086] Meanwhile, the two roller chains 3 rotate in opposite directions and can only rotate in one direction. They are adapted to the two directions of the conveyor belt 2 for correction, so that for each roller chain 3, its chain roller 301 can form a motion cycle and ensure that it will contact the conveyor belt 2. This makes the usage of each correction sleeve 4 nearly consistent and improves the utilization rate.

[0087] It should be noted that, in order to ensure that the slider 405 is at the limit position of the slide groove 3012 before the correction sleeve 4 and the conveyor belt 2 form a frictional engagement, the reset sleeve 601 and the correction sleeve 4 are configured to form a frictional engagement. Thus, during the process of the roller chain 3 passing through the reset sleeve 601, the correction sleeve 4 remains stationary through the frictional engagement with the reset sleeve 601, while the chain roller 301 slides axially relative to the correction sleeve 4 and moves to the limit position of the slider 405 in the slide groove 3012. This ensures that the chain roller 301 of the roller chain 3 used for correction can synchronously drive the correction sleeve 4 to move synchronously, which facilitates synchronously driving the conveyor belt 2 to move and achieve correction.

[0088] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0089] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A tunnel-type heating and conveying device, characterized in that, The tunnel-type heating and conveying equipment includes: a furnace base; a conveyor belt disposed on the furnace base and forming a closed conveying loop on the furnace base; a roller chain disposed on the furnace base and extending along the width direction of the conveyor belt, forming a closed motion loop on the furnace base; the roller chain has multiple chain rollers with hinged ends, the chain rollers extending along the motion path of the roller chain; each chain roller is fitted with a correction sleeve, the correction sleeve being rotatable around its own axis and capable of frictional contact with the conveyor belt; both ends of the correction sleeve are inclined planes, parallel to each other, the inclined planes having a near point and a far point; the correction sleeve is divided into two sub-sleeves along its own axis, the two sub-sleeves of the same correction sleeve forming a rotatable connection; and an adjusting component configured to bring the correction sleeve closer to the conveyor belt before the correction sleeve and the conveyor belt form a frictional engagement. The inclined surface on the side forms the near point and the far point, which are arranged at intervals along a direction perpendicular to the conveyor belt surface, and the near point is closer to the conveyor belt surface than the far point; the positioning assembly includes a reset sleeve, which is disposed on the furnace base; the roller chain passes through the reset sleeve; a plurality of first magnets are inserted into the side wall of the reset sleeve, which are arranged circumferentially, and the first magnets located in one semicircle and the first magnets located in the other semicircle have opposite magnetic polarities facing inward; a plurality of second magnets are inserted into the side wall of each of the sub-sleeves, which are arranged circumferentially, and the second magnets located in one semicircle and the second magnets located in the other semicircle have opposite magnetic polarities facing inward; the adjustment mechanism is configured to adjust the distance of movement of the roller chain in the opposite direction according to the offset of the conveyor belt, and the greater the offset, the greater the movement distance.

2. The tunnel-type heating and conveying equipment according to claim 1, characterized in that, The adjustment mechanism includes a sensing component and a transmission component. The sensing component includes two sensors, both of which are disposed on the furnace base and spaced apart along the width direction of the conveyor belt. Both sensors are configured to sense the distance the edge of the conveyor belt moves outward. The transmission component includes a drive sprocket, a driven sprocket, and a first drive member, both disposed on the furnace base. The drive sprocket and the driven sprocket are both rotatable around their own axes and are in transmission engagement with the roller chain. The first drive member is configured to provide the driving force for the rotation of the drive sprocket.

3. The tunnel-type heating and conveying equipment according to claim 2, characterized in that, The sensing element is a photoelectric sensor.

4. The tunnel-type heating and conveying equipment according to claim 1, characterized in that, The roller chain can slide in a direction perpendicular to the conveyor belt surface to tension the conveyor belt; each of the chain rollers is provided with a blocking part at the hinge, the blocking part is configured to limit the included angle between two adjacent chain rollers and prevent the two adjacent chain rollers from folding outward.

5. The tunnel-type heating and conveying equipment according to claim 4, characterized in that, The tunnel-type heating conveyor also includes a second drive unit configured to provide a driving force for the sliding of the roller chain.

6. The tunnel-type heating and conveying equipment according to claim 1, characterized in that, There are two roller chains, which are symmetrically arranged about the conveyor belt and move in opposite directions; the correction sleeve can slide along its own axis and initially forms a stop with the chain roller.

7. The tunnel-type heating and conveying equipment according to claim 1, characterized in that, The tunnel-type heated conveyor also includes a drive assembly configured to provide driving force for the movement of the conveyor belt.

8. The tunnel-type heating and conveying equipment according to claim 7, characterized in that, The drive assembly includes a drive roller, a driven roller, and a third drive member, all mounted on the furnace base. The drive roller and the driven roller are both rotatable around their own axes and are in transmission engagement with the conveyor belt. The third drive member is configured to provide the drive force for the rotation of the drive roller.

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