A rake dryer stirring mechanism

Abstract

The utility model relates to a kind of harrow dryers stirring mechanism, including stirring shaft and harrow tooth, the stirring shaft includes central shaft, side shaft, the side shaft is equipped with multiple, and it is evenly distributed along central shaft, the harrow tooth is set in side shaft outer end, the central shaft inside sleeve joint has drain pipe, multiple water guide pipes are fixedly connected on drain pipe, water guide pipe corresponds with side shaft, and sleeve joint is in side shaft, the water guide pipe outer end is equipped with the water-collecting hopper of horn shape, water-collecting hopper outer end opening is larger, the opening of one end close to water guide pipe is smaller, gap is equipped between the outer edge of water-collecting hopper and side shaft inner wall, condensate flows into water-collecting hopper from gap.The utility model is configured with drainage mechanism inside stirring shaft, ensures the effective discharge of condensate, prevents condensate reverse absorption steam heat, to improve the efficiency of heat exchange.

Description

Technical Field

[0001] This utility model relates to the field of dryer equipment technology, specifically to a rake dryer stirring mechanism. Background Technology

[0002] A rake dryer is a type of conductive heating vacuum drying equipment that primarily utilizes a dual heating system—a jacket and a hollow stirring shaft—to transfer heat. Under vacuum conditions, this equipment enables low-temperature dehydration of materials. The jacket is located on the outside of the drum, while the stirring shaft is inside. Both are circulated with a heating medium, such as steam, thermal oil, or hot water, to transfer heat to the material. In rake dryers using steam as the heating medium, condensate is generated during heat exchange. Because the jacket is located on the outside of the drum, condensate drainage is relatively convenient. However, condensate drainage from inside the stirring shaft is more difficult. The presence of condensate can absorb heat from the steam, reducing the heat transfer efficiency between the steam and the material, and consequently prolonging the heating time. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned technical problems and provide a stirring mechanism for a rake dryer.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a stirring mechanism for a rake dryer, comprising a stirring shaft and rake teeth. The stirring shaft includes a central shaft and side shafts. Multiple side shafts are provided and are evenly distributed along the central shaft. The rake teeth are located at the outer ends of the side shafts. A drain pipe is sleeved inside the central shaft. Multiple water guide pipes are fixedly connected to the drain pipes. The water guide pipes correspond to the side shafts and are sleeved inside the side shafts. A funnel-shaped water collecting funnel is provided at the outer end of each water guide pipe. The opening at the outer end of the water collecting funnel is larger, and the opening at the end near the water guide pipe is smaller. A gap is provided between the outer edge of the water collecting funnel and the inner wall of the side shaft, and condensate flows into the water collecting funnel from the gap.

[0005] Furthermore, a funnel-shaped silicone ring is provided in the gap, with the inner edge of the silicone ring connected to the water collection funnel and the outer edge of the silicone ring in contact with the inner wall of the side shaft.

[0006] Furthermore, the side shaft includes a shaft body and a shaft cover, which are detachable and sealed together. The shaft cover is located at the outer end of the shaft body, and the rake teeth are fixedly mounted on the shaft cover.

[0007] Furthermore, a one-way valve is provided at the inner end of the water guide pipe, and the one-way valve allows the flow direction to be from one end of the water collection funnel to one end of the drain pipe.

[0008] Furthermore, the opening at the beginning of the drain pipe is smaller, while the opening at the end is larger.

[0009] Furthermore, both ends of the central shaft are equipped with rotatable tee connectors, which are used to connect to steam pipes.

[0010] Furthermore, the tail end of the drain pipe extends to the outside of the central axis.

[0011] The beneficial effects of this invention are as follows: By configuring a drainage mechanism inside the stirring shaft, this invention ensures the effective discharge of condensate and prevents the condensate from absorbing heat from the steam in reverse, thereby improving the efficiency of heat exchange. During the operation of the rake dryer, condensate gradually accumulates as the heat exchange process continues. When the side shaft rotates to a vertically downward position, the accumulated condensate flows into the water collection funnel below through the gap. When the side shaft rotates upward, the condensate flows into the guide pipe along the water collection funnel. A funnel-shaped silicone ring is installed at the gap. When the side shaft is in a vertically downward position, the accumulated condensate, under the action of gravity, compresses the silicone ring, causing it to flow into the lower part of the water collection funnel. When the side shaft rotates upward, the condensate squeezes the silicone ring, making it adhere tightly to the inner wall of the side shaft, minimizing the backflow of condensate and ensuring its smooth discharge. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the stirring mechanism of a rake dryer according to this utility model; Figure 2 This is a schematic diagram of the longitudinal section structure of the stirring mechanism of a rake dryer according to this utility model; Figure 3 yes Figure 2 Enlarged view of part A in the middle.

[0013] 1. Stirring shaft; 2. Rake teeth; 3. Central shaft; 4. Side shaft; 5. Drain pipe; 6. Water guide pipe; 7. Water collection funnel; 8. Gap; 9. Silicone ring; 10. Shaft body; 11. Shaft cover; 12. One-way valve; 13. T-connector. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0015] Embodiments of this utility model: such as Figure 1-3As shown, a rake dryer stirring mechanism includes a stirring shaft 1 and rake teeth 2. The stirring shaft 1 includes a central shaft 3 and side shafts 4. Multiple side shafts 4 are provided and are evenly distributed along the central shaft 3. The rake teeth 2 are located at the outer end of the side shafts 4. A drain pipe 5 is sleeved inside the central shaft 3. Multiple water guide pipes 6 are fixedly connected to the drain pipe 5. The water guide pipes 6 correspond to the side shafts 4 and are sleeved inside the side shafts 4. A funnel-shaped water collecting funnel 7 is provided at the outer end of the water collecting funnel 7. The outer end of the water collecting funnel 7 has a larger opening and the end closer to the water guide pipe 6 has a smaller opening. A gap 8 is provided between the outer edge of the water collecting funnel 7 and the inner wall of the side shaft 4. Condensed water flows into the water collecting funnel 7 from the gap 8.

[0016] With the above structure, during the operation of the rake dryer, as the heat exchange process continues, condensate gradually accumulates. When the side shaft 4 rotates to the vertical downward position, the condensate flows through the gap 8 to the bottom of the water collection funnel 7. During the upward rotation of the side shaft 4, the condensate enters the water collection funnel 7, causing the condensate to flow along the water guide pipe 6 into the drain pipe 5 and be discharged from its tail.

[0017] like Figure 3 As shown, a funnel-shaped silicone ring 9 is provided in the gap 8. The inner edge of the silicone ring 9 is installed and connected to the water collection funnel 7, and the outer edge of the silicone ring 9 is in contact with the inner wall of the side shaft 4.

[0018] The silicone ring 9 is made of high-temperature resistant silicone material.

[0019] With the above structure, when the side shaft 4 is vertically downward, the condensate water is pressed against the silicone ring 9 by gravity, causing it to flow into the bottom of the water collection funnel. When the side shaft 4 rotates upward, the condensate water squeezes the silicone ring 9, making it stick tightly to the inner wall of the side shaft, thus minimizing the backflow of condensate water.

[0020] like Figure 1 As shown, the side shaft 4 includes a shaft body 10 and a shaft cover 11, which are detachable and sealed together. The shaft cover 11 is located at the outer end of the shaft body 10, and the rake teeth 2 are fixedly mounted on the shaft cover 11.

[0021] It is worth noting that the shaft body 10 and the shaft cover 11 are connected by thread, flange or other means.

[0022] With the above structure, the shaft body 10 and the shaft cover 11 are detachable and sealed together, which facilitates maintenance and replacement of the silicone ring 9.

[0023] like Figure 2 As shown, a one-way valve 12 is provided at the inner end of the water guide pipe 6. The one-way valve 12 allows the flow direction to be from one end of the water collection funnel 7 to one end of the drain pipe 5.

[0024] With the above structure, the one-way valve 12 can intercept the condensate in the drain pipe 5, preventing the condensate in the drain pipe 5 from flowing back.

[0025] like Figure 2 As shown, the opening at the beginning of the drain pipe 5 is smaller, and the opening at the end is larger.

[0026] The above structure facilitates the flow of condensate from the beginning to the end for discharge.

[0027] like Figure 2 As shown, both ends of the central shaft 3 are provided with rotatable tee connectors 13, and steam pipes are connected through the tee connectors 13.

[0028] The tail end of the drain pipe 5 extends to the outside of the central shaft 3.

[0029] The above structure facilitates the entry of steam into the central shaft 3, allowing it to exchange heat with the material inside the rake dryer.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0032] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A stirring mechanism for a rake dryer, comprising a stirring shaft (1) and rake teeth (2), wherein the stirring shaft (1) comprises a central shaft (3) and side shafts (4), wherein multiple side shafts (4) are provided and evenly distributed along the central shaft (3), and the rake teeth (2) are disposed at the outer ends of the side shafts (4), characterized in that: The central shaft (3) is fitted with a drain pipe (5), and multiple water guide pipes (6) are fixedly connected to the drain pipe (5). The water guide pipes (6) correspond to the side shaft (4) and are fitted inside the side shaft (4). The outer end of the water guide pipe (6) is provided with a funnel-shaped water collection funnel (7). The outer end of the water collection funnel (7) has a large opening, and the opening at the end near the water guide pipe (6) is smaller. A gap (8) is provided between the outer edge of the water collection funnel (7) and the inner wall of the side shaft (4). Condensed water flows into the water collection funnel (7) from the gap (8).

2. The stirring mechanism of a rake dryer according to claim 1, characterized in that: The gap (8) is provided with a funnel-shaped silicone ring (9), the inner edge of the silicone ring (9) is connected to the water collection funnel (7), and the outer edge of the silicone ring (9) is in contact with the inner wall of the side shaft (4).

3. The stirring mechanism of a rake dryer according to claim 2, characterized in that: The side shaft (4) includes a shaft body (10) and a shaft cover (11), which are detachable and sealed together. The shaft cover (11) is located at the outer end of the shaft body (10), and the rake teeth (2) are fixedly located on the shaft cover (11).

4. The stirring mechanism of a rake dryer according to claim 1, characterized in that: The inner end of the water guide pipe (6) is provided with a one-way valve (12), and the one-way valve (12) allows the flow direction to be from one end of the water collection funnel (7) to one end of the drain pipe (5).

5. The stirring mechanism of a rake dryer according to claim 1, characterized in that: The drain pipe (5) has a smaller opening at the beginning and a larger opening at the end.

6. The stirring mechanism of a rake dryer according to claim 1, characterized in that: The central shaft (3) is provided with rotatable tee connectors (13) at both ends, and the steam pipe is connected through the tee connectors (13).

7. The stirring mechanism of a rake dryer according to claim 6, characterized in that: The tail end of the drain pipe (5) extends to the outside of the central shaft (3).

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