A drying apparatus for polyurethane production

Abstract

The present application relates to a kind of drying equipment for polyurethane production, belong to drying machine technical field.It includes drying cylinder, the bottom of the both ends of the drying cylinder is placed with support base plate, the one side of the drying cylinder is provided with driving structure, the top of the middle of the drying cylinder is provided with discharge port, the bottom of the middle of the drying cylinder is provided with discharge port, the top of the drying cylinder is provided with filter, the driving structure is provided with automatic telescopic component, the end of the driving structure is detachably installed with scraper structure, the bottom of the scraper structure is provided with angle adjusting assembly, the inner wall of the drying cylinder is provided with trigger component, the automatic telescopic component is used to periodically adjust the telescopic amount of scraper structure.The present application is linked to control automatic telescopic component and angle adjusting assembly by trigger component, so that elastic scraper realizes periodic telescopic pressure change and dynamic angle adjustment, effectively solve the problem of easy wall sticking, coking, not completely scraped during drying process.

Description

Technical Field

[0001] This invention relates to the field of drying technology, and in particular to a drying device for polyurethane production. Background Technology

[0002] In the production and processing of polyurethane materials, it is often necessary to heat and dry powder raw materials such as slurries, granules, or semi-finished products to remove moisture and other volatile components. Currently, the industry commonly uses drum-type, rake-type, or paddle-type drying equipment for continuous drying operations, but there are significant technical problems in actual production.

[0003] Due to the high viscosity, poor fluidity, and easy softening of raw materials when heated, they easily adhere to the inner wall of the drying cylinder during the drying process and are difficult to remove on their own. Traditional equipment often uses scrapers with fixed angles and pressures to scrape the wall. The scrapers are in rigid contact with the cylinder wall for a long time, and the frictional heat generated during no-load operation is severe. This can easily cause the residual raw materials to overheat, solidify, and coke locally, which not only affects the drying quality but also damages the cylinder wall and scrapers. Furthermore, when the scraper with a fixed angle is working, a stable wedge-shaped material accumulation area is easily formed at the leading edge. The material is continuously heated and dried in the gap, gradually forming a self-locking structure, which further aggravates the adhesion and coking, leading to scraping failure, cleaning difficulties, and high equipment failure rate.

[0004] Therefore, this application provides a drying apparatus for polyurethane production to meet the requirements. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a drying device for polyurethane production, so as to solve the problem of easy sticking to the wall during the drying process.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A drying device for polyurethane production includes a drying cylinder with supporting base plates at both ends. A drive structure is located on one side of the drying cylinder, a discharge port is located at the top center of the drying cylinder, and a discharge port is located at the bottom center of the drying cylinder. A filter is located at the top of the drying cylinder. An automatic telescopic component is installed on the drive structure, and a scraper structure is detachably installed at the end of the drive structure. An angle adjustment component is located at the bottom of the scraper structure, and a trigger component is located on the inner wall of the drying cylinder. The automatic telescopic component is used to periodically adjust the telescopic amount of the scraper structure, changing the scraping pressure between the scraper structure and the inner wall of the drying cylinder, avoiding material solidification and coking caused by frictional heat generation under no-load conditions, and improving scraping efficiency. The angle adjustment component is used to dynamically adjust the working angle of the scraper structure, increasing the normal peeling force of the scraper structure on the material adhering to the wall, breaking the adhesion interface between the material and the cylinder wall, inhibiting the formation of a stable self-locking structure in the wedge-shaped accumulation area at the leading edge of the scraper structure, avoiding material coking in the gap, and improving scraping efficiency. The trigger component is used to link and control the automatic telescopic component and the angle adjustment component to achieve preset periodic adjustment of the telescopic amount and working angle of the scraper structure.

[0007] Optionally, the drive end of the drive structure is driven to be connected to a rake shaft, a plurality of rake arms are evenly arranged on the outer periphery of the rake shaft, a movable rod is slidably connected inside the rake arm, a limit ring is fixedly installed inside the rake arm, and a connecting piece is fixedly connected to the top of the movable rod.

[0008] Optionally, the scraper structure includes a connecting plate, the connecting plate and the connecting member are rotatably connected by the angle adjustment component, the connecting plate is provided with a guide protrusion, an installation plate is detachably installed inside the connecting plate, an elastic scraper is installed on the installation plate, and a guide groove is formed on the elastic scraper.

[0009] Optionally, the automatic telescopic assembly is disposed inside the rake arm. The automatic telescopic assembly includes a mounting base one, which is fixedly installed inside the rake arm. A telescopic spring is installed on the mounting base one, and the other end of the telescopic spring is installed on a mounting base two. A circular slider is fixedly connected to the top of the mounting base two.

[0010] Optionally, the circular slider is slidably connected to the inner wall of the rake arm, and the travel of the circular slider is limited by a limiting ring.

[0011] Optionally, the angle adjustment component is disposed inside the connector. The angle adjustment component includes a rotating shaft, the top of which is fixedly connected to the bottom of the connecting plate, a connecting rod fixedly connected to the bottom of the rotating shaft, and arc-shaped sliders fixedly connected to both ends of the connecting rod.

[0012] Optionally, the connector has two symmetrically arranged arc-shaped grooves inside, and the arc-shaped grooves are slidably connected to the arc-shaped slider.

[0013] Optionally, the triggering component includes a plurality of annular bosses, which are inclined and slidably connected to guide grooves on the elastic scraper for adjusting the working angle of the elastic scraper.

[0014] Optionally, the inner side of the annular boss is provided with several arc-shaped protrusions for adjusting the extension and retraction length of the elastic scraper.

[0015] Optionally, the arc-shaped protrusion is adapted to the shape and position of the guide groove on the elastic scraper to achieve precise guidance and positioning.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: In the above solution, an automatic telescopic component is built into the rake arm, resulting in a compact structure and high space utilization. The telescopic spring provides a stable elastic restoring force, which, together with the arc-shaped protrusion, enables periodic automatic telescopic movement. No external power is required, making it energy-saving and simple in structure. The circular slider slides against the inner wall of the rake arm, resulting in low frictional resistance, fast response, and smooth operation without jamming. Mounting base one and mounting base two ensure even force distribution on the spring, extending its service life. The limit ring restricts the telescopic stroke, ensuring moderate pressure and safe operation. This component can dynamically change the scraping pressure, avoiding overheating due to no-load friction, and fundamentally preventing material from solidifying and coking due to high temperature, thus improving scraping efficiency and equipment stability.

[0017] By incorporating an angle adjustment component within the connector, the system achieves high integration without occupying additional space. The rotating shaft, connecting rod, arc-shaped slider, and arc-shaped groove work together to achieve continuous and stable adjustment of the scraper angle without jamming or impact. The arc-shaped groove limits the swing range, ensuring reasonable and safe angle changes. The purely mechanical structure requires no electrical control, resulting in a low failure rate and strong anti-interference capabilities. It is suitable for harsh working conditions such as high temperature, high humidity, and high viscosity. Dynamic angle adjustment can significantly enhance the normal peeling force, powerfully breaking down the adhesion interface between the material and the cylinder wall, while simultaneously inhibiting the formation of wedge-shaped accumulation zones and preventing material coking and self-locking within the gaps, thus greatly improving the wall cleaning effect and drying quality.

[0018] By setting up a trigger component, a combination design of inclined annular boss and arc-shaped protrusion is adopted. It is purely mechanically passively triggered, without the need for sensors and electronic control systems. It is low in cost, highly reliable, and long in life. The annular boss slides and engages with the two sides of the guide groove on the elastic scraper, continuously driving the elastic scraper to dynamically change angle. The movement is smooth and stable. The arc-shaped protrusion is precisely matched with the bottom surface of the guide groove, periodically controlling the amount of extension and retraction. The adjustment accuracy is high. Multiple triggers can be achieved in the same circumference, so that the scraper can complete multiple extension and retraction and angle change actions within one rotation. The wall cleaning frequency is high and the effect is good. The two work together to control the angle and extension and retraction of the elastic scraper, realizing a composite scraping mode, effectively solving the problems of material sticking to the wall, coking, and accumulation. Attached Figure Description

[0019] Figure 1 A three-dimensional structural diagram of a drying equipment used in polyurethane production; Figure 2 A cross-sectional view of a drying equipment used in polyurethane production; Figure 3 This is a schematic diagram of the three-dimensional structure of the driving structure; Figure 4 A three-dimensional structural diagram of the scraper structure and the automatic telescopic component; Figure 5 This is a schematic diagram of the three-dimensional structure of the angle adjustment component; Figure 6 A schematic diagram of the 3D structure of the trigger component; Figure 7 A three-dimensional structural diagram of the trigger component and scraper structure; Figure 8 for Figure 7 Enlarged schematic diagram of the structure at point A in the diagram.

[0020] Figure label: 1. Drying cylinder; 101. Support base plate; 2. Drive structure; 201. Rake shaft; 202. Rake arm; 203. Moving rod; 204. Limiting ring; 205. Connecting piece; 3. Discharge port; 4. Outlet port; 5. Filter; 6. Scraper structure; 601. Connecting plate; 602. Guide protrusion; 603. Mounting plate; 604. Elastic scraper; 605. Guide groove; 7. Automatic telescopic assembly; 701. Mounting seat one; 702. Telescopic spring; 703. Mounting seat two; 704. Circular slider; 8. Angle adjustment assembly; 801. Rotating shaft; 802. Connecting rod; 803. Arc-shaped slider; 804. Arc-shaped groove; 9. Trigger assembly; 901. Annular boss; 902. Arc-shaped protrusion. Detailed Implementation

[0021] To further illustrate the technical means and effects adopted by the present invention in order to achieve the intended purpose, the following detailed description is provided in conjunction with the accompanying drawings and preferred embodiments, based on the specific implementation methods, structures, features and effects of the present invention.

[0022] like Figures 1 to 8As shown, an embodiment of the present invention provides a drying device for polyurethane production, including a drying cylinder 1, with supporting base plates 101 placed at the bottom of both ends of the drying cylinder 1, a drive structure 2 provided on one side of the drying cylinder 1, a discharge port 3 provided at the top center of the drying cylinder 1, a discharge port 4 provided at the bottom center of the drying cylinder 1, a filter 5 provided at the top of the drying cylinder 1, an automatic telescopic component 7 provided on the drive structure 2, a scraper structure 6 detachably installed at the end of the drive structure 2, an angle adjustment component 8 provided at the bottom of the scraper structure 6, and a trigger component 9 provided on the inner wall of the drying cylinder 1. The telescopic component 7 is used to periodically adjust the telescopic amount of the scraper structure 6, changing the scraping pressure between the scraper structure 6 and the inner wall of the drying cylinder 1, avoiding material solidification and coking caused by no-load frictional heat generation, and improving scraping efficiency. The angle adjustment component 8 is used to dynamically adjust the working angle of the scraper structure 6, increasing the normal peeling force of the scraper structure 6 on the wall-adhering material, breaking the adhesion interface between the material and the cylinder wall, inhibiting the formation of a stable self-locking structure in the wedge-shaped accumulation area at the leading edge of the scraper structure 6, avoiding material coking in the gap, and further improving scraping efficiency. The trigger component 9 is used for linkage control of the automatic telescopic component. Component 7 and angle adjustment assembly 8 enable preset periodic adjustment of the extension and retraction of scraper structure 6 and working angle. The overall structure is compact and reasonable. The supporting base plate 101 ensures stable operation of drying cylinder 1. The discharge port 3 and outlet port 4 are vertically aligned to ensure continuous and smooth material flow, improving production continuity. Filter 5 filters volatile liquid moisture to prevent material from being carried out, meeting environmental protection and cost control requirements. Automatic extension assembly 7 can periodically adjust the extension and retraction of the scraper, dynamically changing the scraping pressure and avoiding long-term no-load hard friction between the scraper and the cylinder wall, preventing problems at the source. Friction generates heat, causing solidification and coking, reducing the difficulty of scraping. The angle adjustment component 8 can dynamically adjust the working angle of the scraper, greatly improving the normal peeling force on the material adhering to the wall, effectively breaking the strong adhesion interface between the material and the cylinder wall, resulting in more thorough wall cleaning. The dynamic angle change can destroy the stable self-locking structure of the wedge-shaped accumulation area at the leading edge of the scraper, preventing the material from remaining in the gap between the scraper and the cylinder wall to dry and coke, keeping the gap unobstructed. The trigger component 9 realizes the linkage and synchronization of extension and angle adjustment, and precise control according to the preset cycle. No manual intervention is required, resulting in a high degree of automation and significantly improved scraping efficiency and drying quality.

[0023] like Figures 1 to 3As shown, the drive end of the drive structure 2 is connected to a rake shaft 201. Several rake arms 202 are evenly arranged on the outer periphery of the rake shaft 201. A moving rod 203 is slidably connected inside the rake arm 202. A limit ring 204 is fixedly installed inside the rake arm 202. A connector 205 is fixedly connected to the top of the moving rod 203. The rake shaft 201 is directly connected to the drive structure 2, and the power transmission is direct and efficient, ensuring the stable rotation of the scraper structure 6 for scraping materials. The power loss is small and the operation is reliable. The multiple rake arms 202 are evenly distributed and the force is balanced, which can cover the entire inner wall of the drying cylinder 1 for scraping without cleaning dead corners. The moving rod 203 and the rake arm 202 slide together to provide stable guidance for the extension and retraction of the scraper, avoiding deviation and jamming when the scraper extends and retracts. The limit ring 204 precisely limits the stroke of the moving rod 203 to prevent the scraper from extending too far and damaging the cylinder wall or retracting too far and causing incomplete scraping, thus improving the safety and stability of the equipment operation. The connector 205 provides a stable installation base for the scraper structure 6 and the angle adjustment component 8, ensuring that the connection of each component is tight and the transmission is precise.

[0024] like Figures 4 to 5 As shown, the scraper structure 6 includes a connecting plate 601, which is rotatably connected to the connector 205 via an angle adjustment assembly 8. A guide protrusion 602 is provided on the connecting plate 601. An installation plate 603 is detachably installed inside the connecting plate 601, and an elastic scraper 604 is installed on the installation plate 603. A guide groove 605 is provided on the elastic scraper 604. The connecting plate 601 and the connector 205 are rotatably connected, allowing for flexible adjustment of the scraper angle in conjunction with the angle adjustment assembly 8 to adapt to the scraping requirements of materials with different viscosities. The guide protrusion... 602 guides the drying material to both sides to prevent material from accumulating near the connecting plate 601, improving operational stability. The detachable design of the mounting plate 603 facilitates quick disassembly, replacement, and maintenance of the elastic scraper 604, reducing equipment maintenance costs and shortening downtime. The elastic scraper 604 has deformation capability and can adapt to slight deformation of the cylinder wall, resulting in more closely fitted scraping and cleaner wall cleaning. The guide groove 605 and the trigger component 9 precisely cooperate to achieve precise triggering of scraper extension and angle adjustment, ensuring stable and reliable operation and improving control accuracy.

[0025] like Figures 3 to 4As shown, the automatic telescopic assembly 7 is installed inside the rake arm 202. The automatic telescopic assembly 7 includes a first mounting base 701, which is fixedly installed inside the rake arm 202. A telescopic spring 702 is installed on the first mounting base 701, and the other end of the telescopic spring 702 is installed on a second mounting base 703. A circular slider 704 is fixedly connected to the top of the second mounting base 703. The circular slider 704 is slidably connected to the inner wall of the rake arm 202, and its travel is limited by a limiting ring 204. The assembly is built into the rake arm 202, has a compact structure, does not occupy additional space, and results in a small overall size and low noise. With high space utilization, mounting base 1 701 and mounting base 2 703 provide stable support for the telescopic spring 702, ensuring uniform force distribution and smooth extension and contraction, thus extending the service life of the spring. The telescopic spring 702 provides elastic restoring force, which, together with the trigger component 9, enables the scraper to extend and retract periodically without external power, saving energy and having a simple structure. The circular slider 704 slides in contact with the inner wall of the rake arm 202, resulting in low frictional resistance, smooth extension and retraction without jamming, and fast response speed. The limit ring 204 limits the slider stroke, accurately controls the extension length of the scraper, avoids mechanical impact, protects the cylinder wall and scraper, and improves the durability of the equipment.

[0026] like Figures 4 to 5 As shown, the angle adjustment component 8 is housed inside the connector 205. The angle adjustment component 8 includes a rotating shaft 801, the top of which is fixedly connected to the bottom of the connecting plate 601. A connecting rod 802 is fixedly connected to the bottom of the rotating shaft 801, and arc-shaped sliders 803 are fixedly connected to both ends of the connecting rod 802. Two arc-shaped grooves 804 are symmetrically arranged inside the connector 205, and the arc-shaped grooves 804 are slidably connected to the arc-shaped sliders 803. The component is built into the connector 205, exhibiting high integration and a compact structure, without affecting the overall operation of the equipment. The rotating shaft 801 enables the connecting plate 601 and the scraper to rotate stably, and the angle adjustment is flexible and smooth without jamming. The connecting rod 802 and the arc-shaped slider 803 are synchronously driven to ensure that the angle adjustment on both sides of the scraper is consistent and the force is uniform, avoiding uneven wear on one side. The arc-shaped groove 804 and the arc-shaped slider 803 are slidably matched to provide precise guidance for angle adjustment, limit the rotation range, and prevent the scraper angle from being too large or too small. The adjustment is purely mechanical, requiring no electrical control, with a low failure rate and stable operation, and is suitable for the harsh working environment of high temperature and high viscosity in drying equipment.

[0027] like Figure 2 , Figures 6 to 8As shown, the trigger component 9 includes several annular bosses 901, which are inclined and slidably connected to the guide grooves 605 on the elastic scraper 604 for adjusting the working angle of the elastic scraper 604. Several arc-shaped protrusions 902 are provided on the inner side of the annular bosses 901 for adjusting the extension and retraction length of the elastic scraper 604. The arc-shaped protrusions 902 are matched in shape and position to the guide grooves 605 on the elastic scraper 604 to achieve precise guidance and positioning. The inclined annular bosses 901 contact the scraper as it rotates, smoothly pushing the scraper angle to change during the adjustment process. Gentle and impact-free, the precise cooperation between the arc-shaped protrusion 902 and the guide groove 605 enables fixed-point and quantitative control of the scraper's extension and retraction length, achieving high adjustment accuracy. The annular boss 901 and the arc-shaped protrusion 902 allow for multiple extension and retraction and angle adjustments within one rotation of the scraper, resulting in high scraping frequency and excellent wall cleaning effect. Mechanical contact triggering eliminates the need for sensors and electrical control systems, resulting in a simple structure, low cost, and high reliability. It is suitable for continuous industrial production scenarios, simultaneously controlling both extension and angle actions to enhance the scraping effect and effectively solve the problems of material sticking to the wall, coking, and accumulation, ensuring drying quality and continuous equipment operation.

[0028] The working principle of the technical solution provided by this invention is as follows: Before starting the equipment, the material is placed into the drying cylinder 1 through the top discharge port 3, then the discharge port 3 is closed, and the equipment is started. The drive structure 2 drives the rake shaft 201, rake arm 202, and scraper structure 6 to rotate at a uniform speed inside the drying cylinder 1. The material is evenly distributed on the cylinder wall under the stirring, spreading, and pushing of the rotating scraper, achieving efficient thermal drying. The liquid moisture volatilized in the material rises to the top and is filtered by the filter 5 to prevent the material from being carried out. While rotating and drying, the trigger component 9 on the cylinder wall will periodically contact the scraper structure 6, synchronously driving the automatic telescopic component 7 and the angle adjustment component 8 to move, so that the scraper structure 6 forms a compound motion of telescopic pressure change and swing angle change. This ensures that the material sticking to the wall is strongly scraped off, while avoiding the long-term hard friction between the scraper and the cylinder wall to generate heat and preventing the material from accumulating and coking at the front edge of the scraper. Finally, the dried material is smoothly discharged from the bottom discharge port 4.

[0029] The drive structure 2 provides rotational power for the entire equipment. Its output end directly drives the rake shaft 201 to rotate. The rake shaft 201 drives multiple rake arms 202, which are evenly distributed in the circumference, to revolve synchronously. The rake arm 202 is equipped with a radially sliding movable rod 203. The top of the movable rod 203 is connected to the scraper structure 6 through the connector 205, providing a rotational base and radial extension space for the elastic scraper 604 at the top. The rake arm 202 is fixed with a limiting ring 204 to limit the maximum extension and retraction stroke of the movable rod 203 and the scraper, preventing the elastic scraper 604 from excessively squeezing the cylinder wall and causing damage, or from excessive retraction causing scraping failure. The overall transmission is direct and the force is even, achieving 360-degree full coverage scraping of the inner wall of the drying cylinder 1, with no cleaning dead corners.

[0030] When the telescopic spring 702 of the automatic telescopic component 7 is in its naturally extended state, it pushes the circular slider 704 outward through the mounting base 703. The circular slider 704 drives the moving rod 203, the connecting piece 205, and the scraper structure 6 to extend radially as a whole, so that the elastic scraper 604 lightly adheres to the cylinder wall with appropriate basic pressure, ensuring basic scraping effect. When the elastic scraper 604 rotates with the rake arm 202 to the position of the arc-shaped protrusion 902 of the trigger component 9, the arc-shaped protrusion 902 precisely engages with the guide groove 605 on the elastic scraper 604, generating an inward radial thrust on the scraper structure 6. On the one hand, the bending angle between the elastic scraper 604 and the inner wall of the drying cylinder 1 increases, and on the other hand, the elastic scraper 604 and the moving rod 203... The circular slider 704 moves inward synchronously and compresses the telescopic spring 702 to store energy. At this time, the contact pressure between the scraper and the cylinder wall is reduced, avoiding hard friction. When the elastic scraper 604 passes the arc protrusion 902, the pushing force disappears, the bending angle of the elastic scraper 604 becomes smaller, and the telescopic spring 702 releases elastic potential energy, quickly pushing the circular slider 704, the moving rod 203, and the elastic scraper 604 to revert and extend outward, restoring the scraping pressure. Each rotation of the scraper structure 6 passes through the arc protrusion 902 multiple times, realizing multiple extension and contraction periodic pressure-changing movements, effectively avoiding the high temperature generated by long-term rigid friction between the scraper and the cylinder wall, fundamentally preventing the material from solidifying and coking due to overheating, and extending the service life of the scraper and the cylinder wall.

[0031] The annular boss 901 is inclined circumferentially. When the drive structure 2 drives the scraper structure 6 to rotate around the cylinder wall, the elastic scraper 604 slides continuously along the inclined surface of the annular boss 901 through the guide groove 605. The annular boss 901, utilizing its own inclination, applies a continuous guiding force to the guide groove 605, thereby causing the connecting plate 601 and the elastic scraper 604 to continuously, smoothly, and dynamically change the scraping angle around the rotating shaft 801. The rotating shaft 801 rotates synchronously with the connecting plate 601, and the connecting rod 802 at the bottom of the rotating shaft 801 drives the arc-shaped slider 80... 3. The scraper slides in the arc-shaped groove 804 within the connector 205. The arc-shaped groove 804 limits and guides the arc-shaped slider 803, ensuring that the scraper angle changes within a reasonable range. The movement is smooth, without jamming or impact. By continuously and dynamically changing the scraping angle, the normal peeling force of the elastic scraper 604 on the wall-adhering material is significantly improved, which strongly destroys the adhesion interface between the material and the cylinder wall. At the same time, the included angle of the leading edge of the elastic scraper 604 changes continuously, making it impossible to form a stable wedge-shaped accumulation area. This fundamentally avoids the material from drying and coking in the gap between the scraper structure 6 and the cylinder wall.

[0032] The annular boss 901 of the trigger component 9 is always slidably connected to the two sides of the guide groove 605 on the elastic scraper 604, which is responsible for dynamically adjusting the scraping angle of the elastic scraper 604. It is continuously driven throughout the process without interruption or stop. The arc-shaped protrusion 902 cooperates with the bottom surface of the guide groove 605 on the elastic scraper 604, which is responsible for adjusting the radial extension and retraction of the elastic scraper 604, realizing periodic extension and retraction triggering. The two work together to realize a composite scraping mode of continuous dynamic adjustment of the angle of the elastic scraper 604 and quantitative adjustment of the extension and retraction cycle, which greatly improves the scraping efficiency and equipment stability.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A drying apparatus for polyurethane production, characterized by, The device includes a drying cylinder (1), with supporting base plates (101) placed at the bottom of both ends of the drying cylinder (1), a driving structure (2) provided on one side of the drying cylinder (1), a discharge port (3) provided at the top of the middle of the drying cylinder (1), a discharge port (4) provided at the bottom of the middle of the drying cylinder (1), a filter (5) provided at the top of the drying cylinder (1), an automatic telescopic component (7) provided on the driving structure (2), a scraper structure (6) detachably installed at the end of the driving structure (2), an angle adjustment component (8) provided at the bottom of the scraper structure (6), and a trigger component (9) provided on the inner wall of the drying cylinder (1). The automatic telescopic component (7) is used to periodically adjust the telescopic amount of the scraper structure (6), change the scraping pressure between the scraper structure (6) and the inner wall of the drying cylinder (1), avoid material solidification and coking caused by no-load friction heat generation, and improve scraping efficiency. The angle adjustment component (8) is used to dynamically adjust the working angle of the scraper structure (6), increase the normal peeling force of the scraper structure (6) on the wall-adhering material, destroy the adhesion interface between the material and the cylinder wall, inhibit the formation of a stable self-locking structure in the wedge-shaped accumulation area at the leading edge of the scraper structure (6), avoid coking of the material in the gap, and improve scraping efficiency. The trigger component (9) is used to control the automatic telescopic component (7) and the angle adjustment component (8) in a coordinated manner, so as to realize the preset periodic adjustment of the telescopic amount and working angle of the scraper structure (6).

2. The drying apparatus for polyurethane production according to claim 1, characterized by, The drive end of the drive structure (2) is connected to a rake shaft (201). Several rake arms (202) are evenly arranged on the outer periphery of the rake shaft (201). A moving rod (203) is slidably connected inside the rake arm (202). A limit ring (204) is fixedly installed inside the rake arm (202). A connector (205) is fixedly connected to the top of the moving rod (203).

3. The drying apparatus for polyurethane production according to claim 2, characterized by The scraper structure (6) includes a connecting plate (601), which is rotatably connected to the connecting piece (205) via the angle adjustment component (8). A guide protrusion (602) is provided on the connecting plate (601), and an installation plate (603) is detachably installed inside the connecting plate (601). An elastic scraper (604) is installed on the installation plate (603), and a guide groove (605) is provided on the elastic scraper (604).

4. The drying equipment for polyurethane production according to claim 3, characterized in that, The automatic telescopic assembly (7) is located inside the rake arm (202). The automatic telescopic assembly (7) includes a mounting base one (701), which is fixedly installed inside the rake arm (202). A telescopic spring (702) is installed on the mounting base one (701), and the other end of the telescopic spring (702) is installed on the mounting base two (703). A circular slider (704) is fixedly connected to the top of the mounting base two (703).

5. The drying equipment for polyurethane production according to claim 4, characterized in that, The circular slider (704) is slidably connected to the inner wall of the rake arm (202), and the travel of the circular slider (704) is limited by the limiting ring (204).

6. The drying equipment for polyurethane production according to claim 5, characterized in that, The angle adjustment component (8) is disposed inside the connector (205). The angle adjustment component (8) includes a rotating shaft (801). The top of the rotating shaft (801) is fixedly connected to the bottom of the connecting plate (601). A connecting rod (802) is fixedly connected to the bottom of the rotating shaft (801). Arc-shaped sliders (803) are fixedly connected to both ends of the connecting rod (802).

7. The drying equipment for polyurethane production according to claim 6, characterized in that, The connector (205) has two symmetrical arc-shaped grooves (804) inside, and the arc-shaped grooves (804) are slidably connected to the arc-shaped slider (803).

8. The drying equipment for polyurethane production according to claim 7, characterized in that, The triggering component (9) includes several annular bosses (901), which are inclined and slidably connected to the guide grooves (605) on the elastic scraper (604) to adjust the working angle of the elastic scraper (604).

9. The drying equipment for polyurethane production according to claim 8, characterized in that, The inner side of the annular boss (901) is provided with several arc-shaped protrusions (902) for adjusting the extension and retraction length of the elastic scraper (604).

10. The drying equipment for polyurethane production according to claim 9, characterized in that, The arc-shaped protrusion (902) is adapted to the shape and position of the guide groove (605) on the elastic scraper (604) to achieve precise guidance and positioning.

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