A double-cone rotary vacuum dryer

Abstract

The utility model discloses a double cone rotary vacuum drying machine, including base and drying cylinder, the both ends of drying cylinder are symmetrical conical structure, the upper end fixed left side support of base one side, the upper end fixed right side support of base other side, drying cylinder one side is connected through left rotation axis and left side support, drying cylinder's other side is connected through right rotation axis and right side support, the top of drying cylinder is provided material crushing device, material crushing device is fixed on drying cylinder upper end opening place through fixing piece, through setting material crushing device, not only can prevent material to accumulate on the wall, and the multiple crushing blade of material crushing device built -in can effectively real -time smash the caked material, avoid secondary processing to improve the thermal conductivity, improve drying efficiency also.

Description

Technical Field

[0001] This utility model relates to the field of vacuum dryer technology, and more specifically, to a double cone rotary vacuum dryer. Background Technology

[0002] The double-cone rotary vacuum dryer is a high-efficiency drying equipment that integrates mixing and vacuum drying. It is widely used in the pharmaceutical, chemical, and food industries. The double-cone rotary vacuum dryer consists of a double-cone rotating tank. Inside the tank, under vacuum, steam or hot water is introduced into the jacket for heating. Heat is transferred to the wet material through the inner wall of the tank. The water vapor evaporated after the wet material absorbs heat is removed by a vacuum pump through the vacuum exhaust pipe. Because the tank is under vacuum and the rotation of the tank causes the material to constantly move up and down and tumble inside and out, the drying speed is accelerated, drying efficiency is improved, and uniform drying is achieved. However, current double-cone rotary vacuum dryers often experience material accumulation on the walls upon entering the dryer, leading to a lower heat transfer coefficient and a lower drying rate. Utility Model Content

[0003] The purpose of this invention is to provide a double-cone rotary vacuum dryer to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A double-cone rotary vacuum dryer includes a base and a drying cylinder. The two ends of the drying cylinder are symmetrically conical. A left support is fixed to the upper end of one side of the base, and a right support is fixed to the upper end of the other side of the base. One side of the drying cylinder is connected to the left support via a left rotation shaft, and the other side of the drying cylinder is connected to the right support via a right rotation shaft. A material crushing device is provided at the top of the drying cylinder.

[0005] Through the above technical solution, the drying cylinder is designed with a symmetrical structure at both ends, which can concentrate the material to the middle when rotating to avoid residue at both ends. The left and right supports provide a stable rotational support foundation, while the left and right rotation shafts realize a sealed structure to prevent vacuum leakage.

[0006] Preferably, the material crushing device is fixed to the upper opening of the drying cylinder by a fixing member. The material crushing device is equipped with a first reducer, a first drive motor is connected to one side of the first reducer, and a reducer base for supporting the first reducer is connected below the first reducer. A drive shaft penetrating the material crushing device is provided inside the first reducer base. A mechanical seal is sleeved on the outside of the drive shaft. A first flange is provided on the lower side of the mechanical seal. A sealing element is provided below the first flange for auxiliary sealing. Multiple sets of crushing blades are installed on the drive shaft below the sealing element. Adjacent crushing blades are separated and positioned by spacers. A locking nut is provided at the bottom of the drive shaft.

[0007] The material crushing device above the drying cylinder is an improvement of this utility model. The material crushing device is fixed to the opening at the top of the drying cylinder by bolts. The material crushing device can fully crush the material. The first reducer is set to match the critical speed of material crushing, prevent the crushing blades from idling or overloading, and can also adjust the torque required by the crushing blades. The drive shaft is set to transmit the power provided by the drive motor to the crushing blades. The spacer between adjacent crushing blades can adapt to different material particle sizes and avoid blade collision. The mechanical seal can prevent dust from entering the transmission system, and the locking nut can prevent the drive shaft from falling off. The entire material crushing device improves the efficiency of material crushing and prevents uneven material crushing density.

[0008] Preferably, a vacuum filter is provided on one side of the inner wall of the drying cylinder, and the vacuum filter is fixedly connected to the second flange.

[0009] The above technical solution, with its symmetrical upper and lower vacuum filters, can intercept particulate matter from multiple directions. The second flange provides convenient replacement conditions for the vacuum filter, facilitating quick disassembly and cleaning.

[0010] Preferably, a first bearing housing is fitted on the right rotating shaft, a conductive ring is provided on one side of the first bearing housing, the conductive ring is mounted on the right rotating shaft, a sprocket assembly is provided on the other side of the first bearing housing, the sprocket assembly passes through the right rotating shaft, and a vacuum seal is mounted on the right side of the sprocket assembly on the right rotating shaft.

[0011] Through the above technical solution, the first bearing housing can support the right-hand rotating shaft and transmit the load, and also plays a sealing role. Traditional wires with holes in the shaft wall will break the vacuum state, while the presence of the conductive ring can prevent vacuum leakage.

[0012] Preferably, the end of the right rotating shaft is connected to a vacuum tube, and the outlet end of the vacuum tube is connected to a vacuum hose via a fixing member.

[0013] Through the above technical solution, the vacuum tube can evacuate the inside of the drying cylinder to ensure that the material is not contaminated when it enters, and the vacuum hose can adjust the direction of vacuuming.

[0014] Preferably, a second reducer is connected to the bottom side of the transmission sprocket, and a second drive motor is connected to the top side of the second reducer.

[0015] Through the above technical solution, the second reducer can work together with the first reducer to increase the output torque and meet the load requirements of the transmission sprocket.

[0016] Preferably, a second bearing housing is fitted on the left rotating shaft, and a heat source seal is provided on one side of the second bearing housing. The heat source seal is fitted on the left rotating shaft, and a three-way pipe is provided on the left side of the heat source seal. A hot water outlet pipe is connected to the lower side of the left rotating shaft, and a hot water inlet pipe is connected to the end of the left rotating shaft.

[0017] Through the above technical solutions, heat source seals can prevent the heat energy source from escaping and maintain the system's airtightness.

[0018] Preferably, the drying cylinder is provided with a feed inlet at the top.

[0019] Compared with the prior art, the present invention has the following beneficial effects: By installing a material crushing device above the drying cylinder, not only can material accumulation on the cylinder wall be prevented, but the multiple sets of crushing blades built into the material crushing device can effectively crush agglomerated materials in real time, avoiding secondary processing, thereby improving the thermal conductivity and drying efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a cross-sectional structural schematic diagram of a double-cone rotary vacuum dryer according to an embodiment of the present utility model; Figure 2 This is a cross-sectional structural schematic diagram of a double cone rotary vacuum dryer with a material crushing device according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the material crushing device structure of a double cone rotary vacuum dryer according to an embodiment of the present utility model.

[0022] Figure label: 1. Base; 2. Drying cylinder; 3. Left side support; 4. Right side support; 5. Left rotating shaft; 6. Right rotating shaft; 7. Material crushing device; 701. First drive motor; 702. First reducer; 703. Transmission shaft; 704. Mechanical seal; 705. Reducer base; 706. First flange; 707. Sealing element; 708. Crushing blade; 709. Spacer; 710. Locking nut; 8. Vacuum filter; 9. Second flange; 10. First bearing seat; 11. Conductive ring; 12. Sprocket assembly; 13. Vacuum seal; 14. Vacuum tube; 15. Vacuum hose; 16. Second reducer; 17. Second bearing seat; 18. Heat source seal; 19. Hot water outlet pipe; 20. Hot water inlet pipe; 21. Feed inlet; 22. Second drive motor; 23. T-connector. Detailed Implementation

[0023] The utility model will now be further described in conjunction with the accompanying drawings and specific embodiments: Example 1: like Figure 1 As shown, a double cone rotary vacuum dryer includes a base 1 and a rotary drying cylinder 2. The two ends of the drying cylinder 2 are symmetrically cone-shaped, and there is a feed inlet 21 set at the top of the drying cylinder 2. Before the machine is running, the wet material can be added into the drying cylinder 2 through the feed inlet 21.

[0024] like Figure 1 As shown, the left end of the drying cylinder 2 is connected to the left support 3 via the left rotating shaft 5, and the right end of the drying cylinder 2 is connected to the right support 4 via the right rotating shaft 6. Both the left rotating shaft 5 and the right rotating shaft 6 are hollow. A vacuum tube 14 is connected to the end of the right rotating shaft 6. The outlet end of the vacuum tube 14 is connected to the vacuum hose 15 via bolts. After the material is added into the drying cylinder 2 and the drying cylinder 2 is sealed, the vacuum tube 14 and the vacuum hose 15 start to extract the air in the drying cylinder 2 to form a negative pressure environment. The vacuum hose 15 can adjust the direction of vacuuming to ensure the stability of the extracted air.

[0025] like Figure 1 and Figure 2As shown, a first bearing housing 10 is fitted onto the right rotating shaft 6. A conductive ring 11 is provided on the left side of the first bearing housing 10 and is mounted on the right rotating shaft 6. A sprocket assembly 12 is provided on the right side of the first bearing housing 10, and the sprocket assembly 12 passes through the right rotating shaft 6. A vacuum seal 13 is also mounted on the right side of the sprocket assembly 12 and is mounted on the right rotating shaft 6. The conductive ring 11, the first bearing housing 10, and the vacuum seal 13 can all ensure the sealing of the dryer during vacuuming. This is a significant improvement over the traditional method of drilling holes in the shaft wall of the rotating shaft to install wires, which would disrupt the vacuum. The presence of the conductive ring 11 can prevent vacuum leakage. A symmetrical vacuum filter 8 is provided on one side of the inner wall of the drying cylinder 2. The vacuum filter 8 and the second flange 9 are fixedly connected. When the vacuum tube 14 and the vacuum hose 15 are used for vacuuming, the vacuum filter 8 is also activated to intercept material dust or small particles to prevent them from entering the vacuum pipe. A second reducer 16 is connected to the bottom side of the sprocket assembly 12. A second drive motor 22 is connected to the upper side of the second reducer 16. The second drive motor 22 can provide power to the second reducer 16.

[0026] like Figure 1 As shown, a second bearing housing 17 is fitted on the left rotating shaft 5. A heat source seal 18 is provided on the left side of the second bearing housing 17. The heat source seal 18 is fitted on the left rotating shaft 5. A three-way pipe 23 is provided on the left side of the heat source seal 18. A hot water outlet pipe 19 is connected to the lower side of the left rotating shaft 5. A hot water inlet pipe 20 is connected to the end of the left rotating shaft 5. After vacuuming is completed, indirect heating and heat transfer are performed. First, the valve of the three-way pipe 23 on the side of the hot water outlet pipe 19 is closed. Then, hot water is added to the hot water inlet pipe 20 to transfer the heat source to the inside of the drying cylinder 2, providing heat to the drying cylinder 2 and ensuring rapid heating of the equipment. The hot water outlet pipe 19 can recover the cooling medium after the equipment releases heat and guide it back to the heat source for reheating. The heat source seal 18 can isolate the heat energy source from escaping and maintain the system's airtightness.

[0027] Example 2: Please see Figure 2 and Figure 3A double-cone rotary vacuum dryer is disclosed. This equipment includes a material crushing device 7, which is fixed to the top of the drying cylinder 2 by bolts at both ends. A first reducer 702 is installed on the top of the material crushing device 7. A first drive motor 701 is connected to one side of the first reducer 702, providing power to the first reducer 702. A reducer base 705 is connected below the first reducer 702 to support it. A drive shaft 703, penetrating the material crushing device 7, is located inside the reducer base 702. A mechanical seal 704 is fitted around the drive shaft 703, located below the reducer base 705. A radial first flange 706 is provided below the mechanical seal 704, through which the drive shaft 703 passes. A sealing element 70 is located below the first flange 706. 7 is used for auxiliary sealing. Multiple sets of crushing blades 708 are installed on the drive shaft 703 on the lower side of the seal 707. Adjacent crushing blades 708 are separated and positioned by spacers 709. A locking nut 710 is provided at the bottom of the drive shaft 703. After the first drive motor 701 provides power to the first reducer 702, the first reducer 702 can control the torque required for the operation of the crushing blades 708 to adapt to the critical degree of crushing different materials. The drive shaft 703 can provide the power required for the operation of the crushing blades 708. The presence of multiple sets of crushing blades 708 can ensure the uniformity of material crushing during equipment operation and prevent materials from being stuck on the wall due to different sizes. Adding a spacer 709 between adjacent crushing blades 708 can prevent the crushing blades 708 from colliding. The locking nut 710 can ensure the stability of the entire material crushing device 7 during operation.

[0028] After the material crushing device 7 breaks down the material into target particles, the subsequent operation of the dryer is the same as in Embodiment 1, and will not be described again in this embodiment.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[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] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0032] 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.

Claims

1. A double-cone rotary vacuum dryer, comprising a base (1) and a drying cylinder (2), characterized in that, The drying cylinder (2) has a symmetrical conical structure at both ends. The upper end of one side of the base (1) is fixed with a left support (3), and the upper end of the other side of the base (1) is fixed with a right support (4). One side of the drying cylinder (2) is connected to the left support (3) via a left rotating shaft (5), and the other side of the drying cylinder (2) is connected to the right support (4) via a right rotating shaft (6). A material crushing device (7) is provided at the top of the drying cylinder (2). The material crushing device (7) is fixed to the upper opening of the drying cylinder (2) by a fastener. The material crushing device (7) is equipped with a first reducer (702). A first drive motor (701) is connected to one side of the first reducer (702). The machine (702) is connected to a reducer base (705) for supporting the first reducer (702). The first reducer (702) base is provided with a drive shaft (703) that passes through the material crushing device (7). A mechanical seal (704) is sleeved on the outside of the drive shaft (703). A first flange (706) is provided on the lower side of the mechanical seal (704). A sealing element (707) is provided below the first flange (706) for auxiliary sealing. Multiple sets of crushing blades (708) are installed on the drive shaft (703) below the sealing element (707). Adjacent crushing blades (708) are separated and positioned by spacers (709). A locking nut (710) is provided at the bottom of the drive shaft (703).

2. The double-cone rotary vacuum dryer according to claim 1, characterized in that, A number of vacuum filters (8) are provided on one side of the inner wall of the drying cylinder (2), and the vacuum filters (8) are fixedly connected to the second flange (9).

3. The double-cone rotary vacuum dryer according to claim 1, characterized in that, A first bearing seat (10) is fitted on the right rotating shaft (6). A conductive ring (11) is provided on one side of the first bearing seat (10). The conductive ring (11) is installed on the right rotating shaft (6). A sprocket assembly (12) is provided on the other side of the first bearing seat (10). The sprocket assembly (12) passes through the right rotating shaft (6). A vacuum seal (13) is installed on the right side of the sprocket assembly (12) on the right rotating shaft (6).

4. A double-cone rotary vacuum dryer according to claim 3, characterized in that, The end of the right rotating shaft (6) is connected to the vacuum tube (14), and the outlet end of the vacuum tube (14) is connected to the vacuum hose (15) through a fixing member.

5. A double-cone rotary vacuum dryer according to claim 3, characterized in that, The bottom side of the sprocket assembly (12) is connected to a second reducer (16), and the upper side of the second reducer (16) is connected to a second drive motor (22).

6. A double-cone rotary vacuum dryer according to claim 1, characterized in that, The left rotating shaft (5) is fitted with a second bearing seat (17), and a heat source seal (18) is provided on one side of the second bearing seat (17). The heat source seal (18) is fitted on the left rotating shaft (5). A three-way pipe (23) is provided on the left side of the heat source seal (18). A hot water outlet pipe (19) is connected to the lower side of the left rotating shaft (5), and a hot water inlet pipe (20) is connected to the end of the left rotating shaft (5).

7. A double-cone rotary vacuum dryer according to claim 1, characterized in that, The top of the drying cylinder (2) is provided with a feed inlet (21).

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