Novel stirring rake type drying machine with triangular rake teeth

Abstract

The utility model provides a novel stirring rake type drying machine with triangular rake teeth, which mainly comprises an end socket, a feed port, a barrel, the rake teeth, a stirring paddle, a thermal medium inlet, a stirring shaft, a scraping plate, a discharge valve and a thermal medium outlet, the left end of the barrel is connected with the end socket through a flange and a bolt, and the right end of the barrel is welded with the end socket. The two ends of the stirring shaft are supported on end sockets on the two sides of the round barrel through the sealing system, the stirring paddle is connected with the rake teeth, the scraping plate is arranged at the end sockets, the discharging valve is arranged at the discharging port, and the thermal medium inlet and the thermal medium outlet are formed in the two sides of the barrel. The stirring paddle is a triangular stirring paddle and has the advantages that the heat exchange area is large, the stirring torque is small, the stirring paddle cannot be broken and the like, the stirring shaft, the stirring paddle and the rake teeth are provided with internal heating flow channels, heating is even, the heat exchange efficiency is high, and materials can be evenly mixed only by rotating forwards in the drying process. And during discharging, the materials can be pushed to the position of the discharging valve only by reversing during stirring.

Description

Technical Field

[0001] The utility model relates to the field of drying machine equipment, in particular to a novel triangle rake-tooth stirring rake type drying machine. Technical Background

[0002] The rake dryer is designed and strengthened based on the technology of the traditional domestic vacuum rake dryer for various slurry, paste, granular, powder, fiber and other materials. The working principle of the rake dryer is that the material rotates back and forth axially under the stirring of the rake teeth that rotate forward and reverse continuously, and the surface in contact with the inner wall of the shell is constantly renewed. It is indirectly heated by steam, evenly stirred by the rake teeth, and crushed by the crushing rods, so that the moisture on the surface of the material can be discharged more advantageously.

[0003] Rake dryers are widely used in chemical, food, pharmaceutical, environmental protection and other industrial fields. These drying devices are all heated externally, which is prone to wall sticking, uneven heating, long drying time, high energy consumption, serious scarring inside the device, small volume, volatilization affecting product quality, slow gas recovery, etc. The traditional stirring device is only equipped with rake teeth for stirring, and the stirring paddle needs to be constantly switched forward and reverse to make the materials fully mixed, which has problems such as low heat exchange efficiency and small heat exchange area. A Chinese patent with announcement number CN205014756U discloses a vacuum rake dryer, including a chassis frame, an explosion-proof motor, a reducer, a cylinder with a heating jacket on the outer layer and a dust collector arranged on the cylinder, a feed port, a manhole, a temperature measuring interface and a dust collector interface are arranged at the upper end of the cylinder, a discharge port, a temperature measuring interface, a pressure measuring interface, a sampling port and a compressed air inlet are arranged at the lower end, a hollow stirring shaft is horizontally penetrated inside, and hollow rake teeth distributed in a circle are vertically arranged on the stirring shaft, a double-channel rotary joint is provided at one end of the stirring shaft, and the other end is connected to the reducer through a gear, a siphon is arranged in the double-channel rotary joint, and the end of the siphon extends to the lower side of the inside of the stirring shaft, a vacuum port and an air outlet are arranged on the top of the dust collector, and a filter cartridge is arranged inside. This new type can improve the drying efficiency and drying uniformity to a certain extent, and ensure the negative pressure environment inside the cylinder through the setting of bag dust collector to prevent the powder material from being sucked away during vacuuming. However, during the drying process, the material will gradually become viscous and adhere to the inner wall of the cylinder section, which will have a great impact on the drying and recovery of the material. In addition, the equipment is complex and may have defects such as uneven heating, long drying time, high energy consumption, low heat exchange efficiency, and small heat exchange area.

[0004] Based on the above technical defects, it is urgent to develop a new type of triangular rake-tooth stirring rake dryer to improve the traditional stirring device, improve the heat exchange efficiency and increase the heat exchange area. Utility Model Content

[0005] The utility model provides a novel triangle rake-tooth stirring rake dryer to solve the problems of uneven heating, long drying time, uneven stirring and mixing, low heat exchange efficiency, large stirring torque, etc. proposed in the above technical background.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a novel triangular rake-tooth stirring rake dryer, mainly comprising a head, a feed port, a cylinder, rake teeth, a stirring paddle, a heat medium inlet, a stirring shaft, a scraper, a discharge valve and a heat medium outlet, the left end of the cylinder is connected to the head through a flange and bolts, the right end of the cylinder is welded to the head, both ends of the stirring shaft are supported on the heads on both sides of the circular cylinder through a sealing system, the stirring paddle is connected to the rake teeth, the scraper is arranged at the head, the discharge valve is arranged at the discharge port, and the heat medium inlet and the heat medium outlet are arranged on both sides of the cylinder.

[0007] Furthermore, the stirring shaft and the stirring paddle are provided with a single-channel internal heating flow channel, in which a heating medium can be conducted, and the heating medium flows in a closed circuit, so that the flow channel is forcibly heated by the heating medium circulating in a closed circuit, thereby effectively avoiding a short circuit of the heating medium, achieving uniform heating, high heat exchange efficiency, and short drying time.

[0008] Furthermore, the stirring paddle is a triangular stirring paddle with a hollow tube inside, which has the advantages of large heat exchange area, high heat exchange efficiency, small stirring torque, and the stirring paddle will not break, and the mixing of the product on the entire heat exchange surface is optimized.

[0009] Furthermore, both ends of the stirring shaft are supported on the heads on both sides of the circular cylinder through a sealing system. The stirring shaft is connected to a stirring paddle. The stirring shaft is provided with evenly distributed rake teeth. The stirring paddle is connected to the rake teeth. The rake teeth are designed in the shape of a scraper. The tip of the triangular rake teeth will flip the material, thereby achieving the purpose of repeatedly mixing and stirring the material, so that when drying, stirring only needs to be forward, and the material can be evenly mixed and stirred without the need for constant switching of forward and reverse stirring, and the product can be discharged during reverse rotation.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] (1) A new type of triangle rake-tooth stirring rake dryer not only effectively improves the heat exchange efficiency and has a small stirring torque, but also has an internal heating channel designed for the stirring shaft, stirring paddle and rake ruler. The heating channel can conduct the heating medium and is forced to heat by the closed-loop heating medium, which effectively avoids the short circuit of the heating medium. It has the advantages of uniform heating, large heat exchange area, short drying time and no breakage of the stirring paddle.

[0012] (2) The stirring shaft is connected to the stirring paddle, which is provided with evenly distributed rake teeth. The stirring paddle is connected to the rake teeth. The rake teeth are designed in the shape of a scraper. The rake teeth are tilted in different directions and the angles on both sides of the center line are opposite. The rake teeth on the stirring paddle push the material to move to both sides. The tip of the triangular rake teeth will flip the material. When drying, stirring only needs to rotate the material forward to obtain uniform mixing and stirring, without the need to switch between forward and reverse stirring. When discharging, stirring only needs to be reversed to push the material to the discharge valve position. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the front view of a new type of triangle rake-tooth stirring rake dryer;

[0014] Figure 2 It is a schematic diagram of the circulation path of a new type of triangle rake-tooth stirring rake dryer;

[0015] Figure 3 It is a new type of triangle rake-tooth stirring rake dryer stirring paddle schematic diagram;

[0016] Figure 4 It is a front view of a new type of triangle rake-tooth stirring paddle of a rake dryer.

[0017] Description of the symbols in the figure

[0018] 1. Head, 2. Feed inlet, 3. Cylinder, 4. Rake teeth, 5. Agitator, 6. Heat medium inlet, 7. Agitator shaft, 8. Scraper, 9. Discharge valve, 10. Heat medium outlet. DETAILED DESCRIPTION

[0019] The present invention will be further described below through the following embodiments in conjunction with the accompanying drawings.

[0020] See attached pictures Figures 1 to 4A new type of triangular rake-tooth stirring rake dryer mainly includes a head 1, a feed inlet 2, a cylinder 3, rake teeth 4, a stirring paddle 5, a heat medium inlet 6, a stirring shaft 7, a scraper 8, a discharge valve 9, and a heat medium outlet 10. The cylinder 3 is sealed with a head, the left end of the circular cylinder is connected to the head 1 by a flange and bolts, the right end of the circular cylinder 3 is welded to the head, and a hollow stirring shaft 7 is horizontally penetrated inside. The stirring shaft 7, the stirring paddle 5 and the rake teeth 4 are all forcibly heated by a closed-loop heating medium. The stirring shaft 7, the stirring paddle 5 and the rake teeth 4 are designed with an internal heating flow channel, and the heating medium can be conducted in the heating flow channel. The heating medium is forcibly heated by the closed-loop heating medium, which effectively avoids the short circuit of the heating medium, makes the heating uniform and the heat exchange efficiency high, and the drying time is short. A transmission device is provided at one end of the stirring shaft 7, and scrapers 8 for scraping the head are provided at both ends of the stirring shaft 7 to prevent the material from sticking to the head. The stirring shaft 7 is provided with evenly distributed rake teeth 4, which are connected to the stirring paddle 5. The stirring shaft 7, the stirring paddle 5 and the rake teeth 4 together form an agitator, and the function of the agitator is to mix the product during the drying process and discharge the product when rotating in the opposite direction. The stirring paddle 5 is a triangular stirring paddle, which increases the heat exchange area and reduces the stirring torque, so that the stirring paddle 5 will not break, and the mixing of the product on the entire heat exchange surface is optimized. The rake teeth 4 are specially designed triangular rake teeth in the shape of a scraper. The inclination directions of the rake teeth 4 are different, and the angles on both sides of the center line are opposite. The rake teeth on the stirring paddle 5 push the material to move to both sides, and the tip of the triangular rake teeth 4 will flip the material. When drying, stirring only needs to rotate forward, and the material can be evenly mixed and stirred without the need for constant switching of forward and reverse stirring. The scraper of the stirring paddle 5 has a certain angle. When reversing, the bottom end of the triangle will push the material to the middle, that is, the material can be pushed to the position of the discharge valve 9, and then discharged from the discharge port.

[0021] When the utility model is used:

[0022] At the beginning, the material enters the cylinder 3 from the feed inlet 2, and then the transmission device is turned on, and the stirring shaft 7 is started to rotate forward. The rotation of the stirring shaft 7 drives the rotation of the stirring paddle 5, and the rotation of the stirring paddle 5 drives the rake teeth 4 at the bottom to flip the material, so that the material is stirred in the cylinder. The rake teeth 4 are specially designed triangular rake teeth, which are designed in the shape of a scraper. The inclination directions of the rake teeth 4 are different, and the angles on both sides of the center line are opposite. The rake teeth 4 on the stirring paddle 5 push the material to move to both sides, and the tip of the triangular rake teeth 4 will flip the material. When stirring, only forward rotation is required to obtain uniform mixing and stirring of the material. When discharging, stirring only needs to be reversed to push the material to the position of the discharge valve 9. Scrapers 8 for scraping the head are provided at both ends of the stirring shaft 7, which can effectively prevent the material from sticking to the head. The stirring shaft 7, the stirring paddle 5 and the rake teeth 4 are all forced to heat the material by the closed-loop heating medium. An internal heating channel is provided, and the heating is uniform and the heat exchange efficiency is high. A vacuum target dryer discharge valve 9 is provided at the discharge port. The discharge valve 9 blows compressed gas to the valve plug surface and the sealing ring surface through the blowing hole, and blows away the adhered material to achieve the effect of keeping the rake dryer clean and sealed. After the drying is completed, the stirring shaft 7 is started to rotate in the opposite direction, and the product is finally discharged through the discharge valve 9.

[0023] In general, the triangular rake-tooth stirring rake dryer has a simple structure. The stirring shaft, stirring paddle and rake ruler are designed with internal heating channels. The heating medium can be conducted in the heating channel, and the closed-loop circulating heating medium is forced to heat, which effectively avoids the short circuit of the heating medium. It has the advantages of uniform heating, high heat exchange efficiency, large heat exchange area, short drying time, small stirring torque, and the stirring paddle will not break. At the same time, the stirring shaft is connected to the stirring paddle, and the stirring shaft is provided with evenly distributed rake teeth. The stirring paddle is connected to the teeth. The rake teeth are designed in the shape of a scraper. The inclination direction of the rake teeth is different, and the angles on both sides of the center line are opposite. The rake teeth on the stirring paddle push the material to move to both sides, and the tip of the triangular rake teeth will flip the material. When drying, stirring only needs to rotate the material forward to obtain uniform mixing and stirring, without the need to continuously switch between forward and reverse stirring. When discharging, stirring only needs to be reversed to push the material to the discharge valve position.

[0024] The above implementation scheme is only used to illustrate and not to limit the technical solution of the utility model. Any modification or partial replacement that does not deviate from the spirit of the utility model should be included in the scope of the claims of the utility model.

Claims

1. A new type of triangle rake-tooth stirring rake dryer, characterized in that: It mainly includes a head, a feed port, a cylinder, rake teeth, a stirring paddle, a heat medium inlet, a stirring shaft, a scraper, a discharge valve and a heat medium outlet. The left end of the cylinder is connected to the head through a flange and bolts, and the right end of the cylinder is welded to the head. Both ends of the stirring shaft are supported on the heads on both sides of the cylinder through a sealing system. The stirring paddle is connected to the rake teeth, the scraper is arranged at the head, the discharge valve is arranged at the discharge port, and the heat medium inlet and the heat medium outlet are arranged on both sides of the cylinder.

2. A novel triangular rake-tooth stirring rake dryer according to claim 1, characterized in that: The stirring shaft, stirring paddle and rake teeth are designed with internal heating channels, and the stirring shaft, stirring paddle and rake teeth are forcibly heated by a closed-circuit circulating heating medium.

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