Anti-wall sticking vacuum rake dryer

Abstract

The application discloses a kind of anti-sticking wall vacuum rake dryer, comprising: equipment base frame, drum drying chamber, feeding assembly and the motion rake group of rotation installation in the inside of drum drying chamber, the top surface of equipment base frame is fixedly installed with rolling drive table, drum drying chamber includes the rolling sleeve, inner clamp cover and liquid heat cover that are sequentially sleeved, the outside of rolling sleeve is equipped with transmission gear ring, and the inside of rolling drive table is equipped with with transmission gear ring surface transmission connection drive assembly.The application, by setting new motion rake group structure, utilizes drum drying chamber and motion rake group relative reverse rotation motion, in the relative rotation flow scraper motion of inner clamp cover, rotation flow scraper does cutting magnetic induction line motion to make vortex flow in rotation flow scraper, improves the temperature of rotation flow scraper by electrothermal effect in contact material to carry out heat conduction to material inside, improves material heating uniformity, improves drying effect and avoids the phenomenon of sticking wall caused by uneven heating of material.

Description

Technical Field

[0001] This invention relates to the field of dryer technology, specifically to an anti-sticking vacuum rake dryer. Background Technology

[0002] A vacuum rake dryer is a commonly used drying device, primarily used for drying moist materials. Its working principle involves placing the material in the drying chamber, then continuously supplying a heat source to gradually increase the pressure and temperature within the chamber, thereby evaporating the moisture from the material. Simultaneously, rakes inside the equipment continuously agitate and stir the material to ensure even heating and drying. Once all the moisture has evaporated, the equipment automatically stops heating and then uses a vacuum pump to reduce the pressure within the drying chamber to a certain negative pressure range, further promoting drying and protecting the dried material from secondary moisture absorption.

[0003] During the operation of a vacuum rake dryer, heat is conducted to the material through the inner wall of the drying chamber. However, the heat conduction surface is limited to the surface between the material and the inner wall. Uneven heating and slow rake rotation speeds prevent rapid material turning, leading to uneven heating in certain areas. On one hand, when some areas are too hot, surface moisture evaporates quickly to form a dry layer, but internal moisture cannot evaporate in time, resulting in excessively high internal temperatures and the formation of sticky substances, causing the material to stick to the wall. On the other hand, when some areas are too cold, moisture cannot evaporate quickly, resulting in insufficient surface moisture to form a dry layer, preventing internal moisture from escaping and causing sticking. Increasing the rake rotation speed not only affects the heating effect but also causes significant frictional damage to the anti-stick coating on the inner wall. Excessive rake rotation speed can create vortices on the material surface, preventing thorough drying and causing sticking. Conversely, excessively slow rake rotation speeds cause the material to remain in the drying chamber for too long, also leading to sticking. These methods have certain drawbacks.

[0004] In view of this, we have studied and improved the existing problems to provide a non-stick wall vacuum rake dryer to solve the current problems. The aim of this technology is to solve the problems and improve its practical value. Summary of the Invention

[0005] The present invention aims to solve one of the technical problems existing in the prior art or related technologies.

[0006] Therefore, the technical solution adopted by the present invention is as follows: a vacuum rake dryer with anti-stick wall, comprising: a base frame, a drum drying chamber, a feeding assembly, and a moving rake assembly rotatably installed inside the drum drying chamber. A rolling drive platform is fixedly installed on the top surface of the base frame. The drum drying chamber includes a rolling sleeve, an inner jacket, and a liquid heat jacket that are sequentially nested together. A transmission gear ring is provided on the outer side of the rolling sleeve, and a drive assembly is provided on the inner side of the rolling drive platform that is connected to the surface of the transmission gear ring for driving the drum drying chamber to rotate on the surface of the rolling drive platform. A plurality of uniformly distributed permanent magnet blocks are embedded in the surface of the inner jacket.

[0007] The feeding assembly includes a rotating support frame fixedly installed on one side of the rolling drive table and a rotating ring seat rotatably sleeved on the outer periphery of the rotating support frame. Several feeding hoppers are fixedly installed on the surface of the rotating ring seat. A conveying hopper located inside the rotating ring seat is fixedly installed on the top surface of the rotating support frame. A conveying roller is fixedly installed inside the conveying hopper, and a motor for driving the conveying roller to rotate is provided at one end of the conveying hopper.

[0008] The moving rake assembly includes a main shaft, several radial support assemblies fixedly sleeved on the outside of the main shaft, and swirling scrapers and turning strips fixedly installed on the outer periphery of the radial support assemblies. The swirling scrapers are arranged in a spiral shape and have several vortex lines embedded inside.

[0009] In a preferred embodiment, the present invention can be further configured as follows: the surfaces of the rolling sleeve, inner jacket and liquid heat jacket are provided with through-feed ports, the rolling sleeve, inner jacket and liquid heat jacket are provided with discharge ports, and the surface of the rolling drive table is provided with through-hole grooves arranged opposite to the discharge ports. The feed port and the bottom material outlet of the conveyor hopper are located on the same vertical line, and valves are provided on the surfaces of both the feed port and the discharge port.

[0010] In a preferred embodiment, the present invention may be further configured such that: the liquid heat jacket is provided with a plurality of heat-conducting coils inside, and the heat-conducting coils are filled with a heating medium; the liquid heat jacket is provided with a heating wire for heating; and the liquid heat jacket is provided with a vacuum pump for reducing the internal air pressure of the liquid heat jacket.

[0011] In a preferred embodiment, the present invention can be further configured such that: the surface of the rotating ring seat is provided with a plurality of radially arranged strips, the inner side of the rotating support frame is fixedly installed with a drive motor, the output end of the drive motor is provided with a clutch, and the output end of the clutch is respectively provided with two transmission shafts fixedly connected to the ends of the strips and the moving rake assembly.

[0012] In a preferred embodiment, the present invention may be further configured such that the radial support assembly includes a fixed sleeve fitted onto the surface of the main shaft and a plurality of elastic support bars fixedly installed on the outside of the fixed sleeve, wherein the elastic support bars are elastic metal strip structures.

[0013] In a preferred embodiment, the present invention may be further configured such that: one side of the swirl scraper is provided with a scraping blade, and the inner side of the liquid heat jacket is provided with an anti-stick coating, wherein the anti-stick coating is one of a ceramic coating or a PTFE coating.

[0014] In a preferred embodiment, the present invention can be further configured such that: a plurality of permanent magnet blocks are arranged in a matrix on the surface of the inner jacket, and the magnetic poles of the plurality of permanent magnet blocks are arranged in the same direction along the radial direction of the liquid heat jacket.

[0015] In a preferred embodiment, the present invention can be further configured such that: the number of swirling scrapers is several and they are evenly arranged in a circumferential direction around the outer periphery of the radial support assembly; the internal vortex lines of two swirling scrapers arranged opposite each other about the center of the main shaft are connected to each other to form a closed loop structure; and the vortex lines are conductive copper wire structures.

[0016] The beneficial effects achieved by this invention are as follows:

[0017] 1. In this invention, by setting up a novel moving rake group structure, the drum drying chamber and the moving rake group rotate in opposite directions. During the relative movement of the inner jacket and the swirling scraper, the swirling scraper moves to cut magnetic field lines, causing eddies to be generated inside the swirling scraper. The electrothermal effect increases the temperature of the swirling scraper, which conducts heat to the inside of the material during contact, improving the uniformity of material heating, improving the drying effect, and avoiding the phenomenon of sticking to the wall caused by uneven heating of the material.

[0018] 2. In this invention, by configuring a new motion working mode, the drum drying chamber and the moving rake group rotate in opposite directions together, which increases the relative speed between the equipment frame and the moving rake group, and quickly turns the material over. The swirling scraper and the turning strip turn the material over globally, thereby avoiding local adhesion.

[0019] 3. In this invention, by setting a radial support assembly as a support structure for the swirling scraper and the turning strip, the radial support assembly provides elastic contact between the swirling scraper and the turning strip and the inner wall of the liquid heat jacket, reducing the friction between the moving rake assembly and the inner wall of the liquid heat jacket, and providing a certain degree of protection for the anti-stick coating. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the feeding assembly and moving rake assembly according to an embodiment of the present invention;

[0022] Figure 3 This is an exploded view of the drum drying chamber according to an embodiment of the present invention;

[0023] Figure 4This is one embodiment of the present invention. Figure 3 A schematic diagram of the structure at point A;

[0024] Figure 5 This is a schematic diagram of the moving rake assembly structure according to an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the radial support component installation structure according to an embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the swirling scraper and vortex line structure according to an embodiment of the present invention.

[0027] Figure label:

[0028] 100. Equipment base frame; 110. Roll drive table;

[0029] 200. Drum drying chamber; 210. Rolling sleeve; 220. Inner jacket; 230. Liquid heat jacket; 211. Transmission gear ring; 221. Permanent magnet block;

[0030] 300. Feeding assembly; 310. Rotary support frame; 320. Rotary ring seat; 330. Feeding hopper; 340. Conveying hopper; 350. Conveying roller;

[0031] 400. Moving rake assembly; 410. Main shaft; 420. Radial support assembly; 430. Swirl scraper; 440. Turning bar; 421. Fixed sleeve; 422. Elastic support bar; 431. Scraping blade; 432. Vortex line. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0033] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing a non-stick wall vacuum rake dryer.

[0034] Combination Figure 1-7As shown, the present invention provides an anti-sticking vacuum rake dryer, comprising: a base frame 100, a drum drying chamber 200, a feeding assembly 300, and a moving rake assembly 400 rotatably installed inside the drum drying chamber 200. A rolling drive platform 110 is fixedly installed on the top surface of the base frame 100. The drum drying chamber 200 includes a rolling sleeve 210, an inner jacket 220, and a liquid heat jacket 230 that are sequentially sleeved together. A transmission gear ring 211 is provided on the outer side of the rolling sleeve 210, and a drive assembly is provided on the inner side of the rolling drive platform 110 that is connected to the surface of the transmission gear ring 211 for driving the drum drying chamber 200 to rotate on the surface of the rolling drive platform 110. A plurality of uniformly distributed permanent magnet blocks 221 are embedded in the surface of the inner jacket 220.

[0035] The feeding assembly 300 includes a rotating support frame 310 fixedly installed on one side of the rolling drive table 110 and a rotating ring seat 320 rotatably sleeved on the outer periphery of the rotating support frame 310. A plurality of feeding hoppers 330 are fixedly installed on the surface of the rotating ring seat 320. A conveying hopper 340 located inside the rotating ring seat 320 is fixedly installed on the top surface of the rotating support frame 310. A conveying roller 350 is fixedly installed inside the conveying hopper 340, and a motor for driving the conveying roller 350 to rotate is provided at one end of the conveying hopper 340.

[0036] The motion rake assembly 400 includes a main shaft 410, several radial support assemblies 420 fixedly sleeved on the outside of the main shaft 410, and swirling scrapers 430 and turning strips 440 fixedly installed on the outer periphery of the radial support assemblies 420. The swirling scrapers 430 are arranged in a spiral shape and have several vortex lines 432 embedded inside.

[0037] In this embodiment, the surfaces of the rolling sleeve 210, the inner jacket 220, and the liquid heat jacket 230 are provided with through-feed ports, the rolling sleeve 210, the inner jacket 220, and the liquid heat jacket 230 are provided with discharge ports, and the surface of the rolling drive table 110 is provided with through-hole slots arranged opposite to the discharge ports. The feed port and the bottom material outlet of the conveying hopper 340 are located on the same vertical line, and valves are provided on the surfaces of both the feed port and the discharge port.

[0038] Specifically, material is discharged and filled through the discharge port and feed port on the surface of the drum drying chamber 200.

[0039] In this embodiment, the liquid heat jacket 230 is provided with a plurality of heat-conducting coils inside, and the heat-conducting coils are filled with a heating medium. The liquid heat jacket 230 is provided with a heating wire for heating inside, and a vacuum pump for reducing the internal air pressure of the liquid heat jacket 230 is provided inside.

[0040] Specifically, the overall temperature of the liquid heat jacket 230 is increased by the internal heating structure to heat the material, and the pressure and temperature inside the liquid heat jacket 230 are gradually increased, thereby evaporating the moisture in the material.

[0041] In this embodiment, the surface of the rotating ring seat 320 is provided with a plurality of radially arranged strips, and a drive motor is fixedly installed on the inner side of the rotating support frame 310. The output end of the drive motor is provided with a clutch, and the output end of the clutch is respectively provided with two transmission shafts fixedly connected to the ends of the strips and the moving rake assembly 400.

[0042] Specifically, the rotating support frame 310 uses a surface drive motor to drive the rotation of the rotating ring seat 320 and the moving rake assembly 400, and switches between the rotating ring seat 320 and the moving rake assembly 400 under the control of the clutch to drive either the rotating ring seat 320 or the moving rake assembly 400 to rotate or to make the rotating ring seat 320 and the moving rake assembly 400 rotate synchronously.

[0043] In this embodiment, the radial support assembly 420 includes a fixed sleeve 421 sleeved on the surface of the main shaft 410 and a plurality of elastic support bars 422 fixedly installed on the outside of the fixed sleeve 421. The elastic support bars 422 are elastic metal strip structures.

[0044] Furthermore, the swirl scraper 430 has a scraping blade 431 on one side, and the inner side of the liquid heat jacket 230 has an anti-stick coating, which is either a ceramic coating or a PTFE coating.

[0045] Specifically, a scratch-resistant and wear-resistant ceramic coating or PTFE coating is used as the internal anti-stick structure of the liquid heat jacket 230, and the protective effect of the coating is further improved by the elastic radial support component 420.

[0046] In this embodiment, a plurality of permanent magnet blocks 221 are arranged in a matrix on the surface of the inner jacket 220, and the magnetic poles of the plurality of permanent magnet blocks 221 are arranged in the same direction along the radial direction of the liquid heat jacket 230.

[0047] Furthermore, the number of swirl scrapers 430 is several and they are evenly arranged in a circumferential direction around the outer periphery of the radial support assembly 420. The vortex lines 432 inside the two swirl scrapers 430 arranged opposite to the center of the main shaft 410 are connected to each other to form a closed loop structure. The vortex lines 432 are conductive copper wire structures.

[0048] Specifically, under the synchronous counter-rotation of the drum drying chamber 200 and the moving rake group 400, the eddy current line 432 repeatedly cuts the magnetic field lines, generating current inside. The short-circuit loop of the eddy current line 432 causes the current to be consumed by the resistance of the eddy current line 432 itself, generating a large amount of heat. The heat of the swirling scraper 430 further heats the material, and the moving swirling scraper 430 effectively heats the internal part of the material and makes the heating more uniform.

[0049] Working principle and usage process of this invention:

[0050] When using this vacuum rake dryer, the internal drive assembly of the roller drive table 110 drives the drum drying chamber 200 to rotate on the surface of the roller drive table 110, so that the feed port on the surface of the drum drying chamber 200 is connected to the bottom surface of the conveyor hopper 340. The liquid heat jacket 230 is started for preheating and feeding. The drive motor on the surface of the rotating support frame 310 drives the rotating ring seat 320 and the moving rake group 400 to rotate synchronously. The rotating ring seat 320 rotates on the surface of the rotating support frame 310, the feeding hopper 330 picks up the material and rotates along the outer circumference of the rotating support frame 310 to the top of the conveyor hopper 340 to transfer the material into the conveyor hopper 340. The rotation of the conveyor roller 350 outputs the material into the drum drying chamber 200, realizing automatic feeding operation.

[0051] After the material is fed, the surface door of the drum drying chamber 200 is closed. The clutch assembly causes the surface drive motor of the rotating support frame 310 to drive the moving rake group 400 to continue rotating while the rotating ring seat 320 stops rotating. The internal drive assembly of the rolling drive table 110 drives the drum drying chamber 200 to rotate at a constant speed on the surface of the rolling drive table 110. Inside the liquid heat jacket 230, the material is agitated by the rolling and turning of the drum drying chamber 200 and the rotation of the moving rake group 400. By continuously supplying heat source, the pressure and temperature inside the liquid heat jacket 230 are gradually increased, thereby evaporating the moisture in the material. Meanwhile, the material is continuously turned over and stirred in the drum drying chamber 200 and the moving rake assembly 400 to ensure that the material is heated and dried evenly. The pressure in the drying chamber is reduced to a certain negative pressure range by a vacuum pump to promote the drying of the material. As the inner jacket 220 moves relative to the swirling scraper 430, the swirling scraper 430 moves by cutting magnetic field lines, which generates eddies inside the swirling scraper 430. The electrothermal effect increases the temperature of the swirling scraper 430, which conducts heat to the inside of the material during contact, improving the uniformity of material heating, improving the drying effect, and avoiding the phenomenon of sticking to the wall caused by uneven heating of the material. The radial support assembly 420 provides elastic contact between the swirling scraper 430 and the turning strip 440 and the inner wall of the liquid heat jacket 230, reducing the friction between the moving rake assembly 400 and the inner wall of the liquid heat jacket 230, and providing a certain degree of protection for the anti-stick coating.

[0052] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A stick wall preventing vacuum rake dryer characterized by, The device base (100), the drum drying chamber (200), the feeding assembly (300) and the moving rake group (400) rotatingly installed in the drum drying chamber (200) are included, the top surface of the device base (100) is fixedly installed with a rolling driving table (110), the drum drying chamber (200) includes a rolling sleeve (210), an inner clamping sleeve (220) and a liquid heating sleeve (230) which are sequentially sleeved from outside to inside, the outer side of the rolling sleeve (210) is provided with a transmission gear ring (211), and the inner side of the rolling driving table (110) is provided with a driving assembly in surface transmission connection with the transmission gear ring (211) for driving the drum drying chamber (200) to rotate on the surface of the rolling driving table (110), and the surface of the inner clamping sleeve (220) is embeddedly installed with a plurality of uniformly distributed permanent magnets (221); The feeding assembly (300) includes a rotating support frame (310) fixedly installed on one side of the rolling driving table (110) and a rotating ring seat (320) rotatingly sleeved on the outer periphery of the rotating support frame (310), the surface of the rotating ring seat (320) is fixedly installed with a plurality of feeding hoppers (330), the top surface of the rotating support frame (310) is fixedly installed with a conveying hopper (340) located on the inner side of the rotating ring seat (320), the inside of the conveying hopper (340) is fixedly installed with a conveying roller (350), and one end of the conveying hopper (340) is provided with a motor for driving the conveying roller (350) to rotate; The moving rake group (400) includes a main shaft rod (410), a plurality of radial support assemblies (420) fixedly sleeved on the outer side of the main shaft rod (410), and a rotational flow scraper (430) and a material turning strip (440) fixedly installed on the outer periphery of the radial support assembly (420), the rotational flow scraper (430) and the material turning strip (440) are elastically abutted with the inner wall of the liquid heating sleeve (230) by the radial support assembly (420), the rotational flow scraper (430) is arranged in a spiral shape and internally embeddedly installed with a plurality of vortex lines (432); The radial support assembly (420) includes a fixed sleeve seat (421) sleeved on the surface of the main shaft rod (410) and a plurality of elastic support strips (422) fixedly installed on the outer side of the fixed sleeve seat (421), and the elastic support strip (422) is an elastic metal strip structure; The number of the rotational flow scrapers (430) is several and they are uniformly arranged in the circumferential direction on the outer periphery of the radial support assembly (420), the internal vortex lines (432) of two rotational flow scrapers (430) oppositely arranged about the center of the main shaft rod (410) are connected and combined to form a closed loop structure, and the vortex line (432) is a conductive copper wire structure; One side of the rotational flow scraper (430) is provided with a scraping edge (431), the inner side of the liquid heating sleeve (230) is provided with an anti-sticking coating, and the anti-sticking coating is one of a ceramic coating and a PTFE coating; A plurality of the permanent magnets (221) are arranged in a matrix on the surface of the inner clamping sleeve (220), and the magnetic pole arrangement directions of the plurality of permanent magnets (221) are the same and are arranged along the radial direction of the liquid heating sleeve (230). ​ The drum drying chamber (200) and the moving rake group (400) are relatively reverse rotating, in the relative rotating flow of the inner jacket (220) and the flow scraper (430), the flow scraper (430) cuts the magnetic induction lines to make the flow scraper (430) generate eddy current, and the temperature of the flow scraper (430) is increased by the electric heating effect to conduct heat to the material inside the material.

2. A vacuum rake dryer with anti-sticky walls according to claim 1, characterized in that The surface of the rolling sleeve (210), the inner jacket (220) and the liquid heat sleeve (230) is provided with a feed inlet penetratingly arranged, the rolling sleeve (210), the inner jacket (220) and the liquid heat sleeve (230) are provided with a discharge outlet, and the surface of the rolling driving table (110) is provided with a through hole groove arranged opposite to the discharge outlet, the feed inlet and the bottom material port of the conveying hopper (340) are located on the same vertical line, and the surfaces of the feed inlet and the discharge outlet are provided with valves.

3. A vacuum rake dryer with anti-sticky walls according to claim 1, characterized in that The inside of the liquid heat sleeve (230) is provided with a plurality of heat conduction coils, the inside of the heat conduction coil is filled with a heating medium, the inside of the liquid heat sleeve (230) is provided with an electric heating wire for heating, and the inside of the liquid heat sleeve (230) is provided with a vacuum pump for reducing the internal gas pressure of the liquid heat sleeve (230).

4. A vacuum rake dryer with anti-sticky walls according to claim 1, characterized in that The surface of the rotating ring seat (320) is provided with a plurality of radial banner strips, the inner side of the rotating support frame (310) is fixedly installed with a driving motor, the output end of the driving motor is provided with a clutch, and the output end of the clutch is respectively provided with two transmission shafts fixedly connected with the banner strips and the end of the moving rake group (400).

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