Vacuum drying equipment vacuum breaking and unloading system

Abstract

This utility model discloses a vacuum drying equipment vacuum unloading system. The inner cavity of the horizontal cylinder is a vacuum drying chamber, and a double-shaft auger system is installed inside the vacuum drying chamber. The vacuum system includes a vacuum pump, which is connected to the vacuum drying chamber through pipelines. One end of the sealed unloading device is connected to the bottom of the horizontal cylinder, and the other end is connected to the storage tank through a conical tube. An electromagnetic shielded sealing door is installed inside the sealed unloading device. The electromagnetic shielded sealing door is driven by a reducer to achieve linear extension and retraction of the lead screw. The surface of the electromagnetic shielded sealing door is covered with a lip-shaped silicone seal and an electromagnetic shielding mesh. It also includes an automatic suction valve and a cleaning and charging valve. During unloading, the cleaning and charging valve is filled with dry, anhydrous gas, so that the drying chamber is filled with positive pressure. Under the pressure drive of the positive pressure and in conjunction with the conveying unloading of the double-shaft auger, the unloading is faster and more efficient, improving the unloading efficiency. For the cleaning of residual material at the bottom, the positive pressure drive at the bottom reduces the cleaning difficulty and reduces hard damage to the inner cavity of the horizontal cylinder.

Description

Technical Field

[0001] This utility model relates to the field of material drying technology, and in particular to a vacuum breaking unloading system for a vacuum drying equipment suitable for low-temperature rapid and uniform drying of powder or granular materials in the chemical, plastics, pharmaceutical and food industries. Background Technology

[0002] Traditional drying equipment faces a series of challenging problems during unloading. In conventional methods, materials rely primarily on gravity or simple mechanical devices for unloading. For highly viscous materials or those with uneven particle size, this easily leads to poor unloading, pipe blockages, and low unloading efficiency. Furthermore, inadequate sealing of the unloading device allows large amounts of outside air and impurities to enter during unloading, contaminating the material. Post-unloading cleaning is difficult, with residual material adhering to the equipment's inner walls and pipes. Manual cleaning is time-consuming and labor-intensive, while chemical cleaning can corrode the equipment, severely impacting its lifespan and subsequent production efficiency. Summary of the Invention

[0003] To address the aforementioned issues, our company has developed a vacuum drying equipment vacuum breaking unloading system, which enables rapid and pollution-free material unloading while reducing the adhesion of residual material to the inner wall of the equipment and pipelines.

[0004] To solve the above-mentioned technical problems, this utility model provides a vacuum drying equipment vacuum breaking unloading system, comprising:

[0005] A horizontal cylindrical body, the inner cavity of which is a vacuum drying chamber, and a dual-shaft auger system is installed inside the vacuum drying chamber;

[0006] A vacuum system, including a vacuum pump, which is connected to the vacuum drying chamber via a pipeline;

[0007] The horizontal cylindrical body is connected to a sealed discharge structure, which includes:

[0008] A sealed unloading device, one end of which is connected to the bottom of the horizontal cylinder, and the other end of which is connected to the storage tank through a tapered tube;

[0009] The sealing unloading device is equipped with an electromagnetic shielding sealing door, which is linearly extended and retracted by a reducer-driven screw. The surface of the electromagnetic shielding sealing door is covered with a lip-shaped silicone seal and an electromagnetic shielding mesh.

[0010] It also includes an automatic suction valve and a cleaning and air filling valve connected to the vacuum drying chamber, wherein the cleaning and air filling valve is connected to an external drying and waterless air source.

[0011] Preferably, the material cleaning and air filling valve is located at the end and bottom of the upstream head of the horizontal cylinder in the discharge direction.

[0012] Preferably, the sealed discharge structure connects the downstream end and bottom of the horizontal cylinder in the discharge direction.

[0013] Preferably, the sealing unloading device includes a sealing buffer chamber, the lower part of which is connected to the tapered tube. The sealing buffer chamber is in close contact with the discharge end of the horizontal cylinder. One side of the sealing buffer chamber is connected to the horizontal cylinder at the discharge port of the horizontal cylinder. An electromagnetic shielding sealing door is provided in the sealing buffer chamber corresponding to the discharge port.

[0014] Preferably, a drive motor is provided on the other side of the sealed buffer cavity, the drive motor is connected to a lead screw through a reducer, and the lead screw passes through the side wall of the sealed buffer cavity and connects to the electromagnetic shielding sealing door.

[0015] Preferably, a shielding mesh is provided on one side of the sealing opening of the electromagnetic shielding sealing door.

[0016] Preferably, a lip-shaped silicone seal is fitted onto the lead screw on the other side of the sealing buffer cavity.

[0017] Preferably, the upper part of the tapered tube is connected to the sealed buffer chamber, and the lower part is connected to the unloading valve, which is connected to the storage tank through the unloading pipe.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] This utility model's sealing unloading device works in conjunction with an electromagnetic shielding sealing door. The lip-shaped silicone sealant provides a tight seal, effectively blocking external impurities and providing a clean unloading environment for materials, ensuring product quality. The electromagnetic shielding sealing door also efficiently shields electromagnetic interference, allowing the equipment to be used for unloading electromagnetically sensitive materials such as electronic materials and high-end pharmaceuticals, thus broadening its application range. During unloading, the cleaning and inflation valve fills the drying chamber with dry, anhydrous gas, creating positive pressure. Driven by this positive pressure and in conjunction with the dual-shaft auger conveying unloading, unloading becomes faster and more efficient, improving unloading efficiency. Simultaneously, the bottom residual material is cleaned using a bottom positive pressure drive, reducing cleaning difficulty, minimizing hard damage to the horizontal cylinder's inner cavity, and extending the equipment's lifespan. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of 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 1A schematic diagram of the vacuum drying equipment configured with the vacuum breaking and unloading system of this embodiment;

[0022] Figure 2 for Figure 1 A magnified view of a portion of the central section (I).

[0023] Among them, 1 - horizontal cylinder, 2 - vacuum drying chamber, 3 - dual-shaft auger system, 4 - vacuum pump, 5 - sealed unloading device, 6 - sealed buffer chamber, 7 - conical tube, 8 - unloading port, 9 - electromagnetic shielding sealing door, 10 - drive motor, 11 - lead screw, 12 - electromagnetic shielding mesh, 13 - lip silicone seal, 14 - unloading valve, 15 - unloading pipe, 16 - storage hopper, 17 - automatic suction valve, 18 - cleaning and air charging valve. Detailed Implementation

[0024] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0025] like Figure 1 and Figure 2 As shown in the figure, this embodiment provides a vacuum drying equipment vacuum breaking unloading system, and its specific implementation method is as follows.

[0026] A vacuum drying equipment vacuum unloading system includes: a horizontal cylindrical body 1, the inner cavity of which is a vacuum drying chamber 2, the vacuum drying chamber 2 having a built-in dual-shaft auger system 3; a vacuum system including a vacuum pump 4, the vacuum pump 4 being connected to the vacuum drying chamber 2 via a pipeline; the horizontal cylindrical body 1 is connected to a sealed discharge structure, the sealed discharge structure including: a sealed unloading device 5, one end of which is connected to the bottom of the horizontal cylindrical body 1, and the other end of which is connected to a storage tank 16 via a tapered tube 13. Specifically, the sealed unloading device 5 includes a sealed buffer chamber 6, the lower part of which is connected to the tapered tube 7, the sealed buffer chamber 6 being close to the discharge end of the horizontal cylindrical body 1, one side of which is connected to the horizontal cylindrical body 1 and positioned at the discharge port 8 connected to the horizontal cylindrical body 1, and an electromagnetic shielding sealing door 9 corresponding to the discharge port 8 within the sealed buffer chamber 6. A drive motor 10 is installed on the other side of the sealed buffer cavity 6. The drive motor 10 is connected to a lead screw 11 via a reducer. The lead screw 11 passes through the side wall of the sealed buffer cavity 6 and connects to the electromagnetic shielding sealing door 9. An electromagnetic shielding mesh 12 is installed on the sealing side of the electromagnetic shielding sealing door 9. A lip-shaped silicone seal 13 is fitted onto the lead screw 11 on the other side of the sealed buffer cavity 6. The upper part of the tapered tube 13 is connected to the sealed buffer cavity 6, and the lower part is connected to the unloading valve 14. The unloading valve 14 is connected to the storage tank 16 via an unloading pipe 15.

[0027] It also includes an automatic suction valve 17 and a cleaning and air-charging valve 18 connected to the vacuum drying chamber 2. The cleaning and air-charging valve 18 is externally connected to a drying, waterless air source. The cleaning and air-charging valve 18 is located at the end and bottom of the upstream head in the discharge direction of the horizontal cylinder 1. The sealed discharge structure is connected to the end and bottom of the downstream tail in the discharge direction of the horizontal cylinder 1.

[0028] The sealing unloading device 5 works in conjunction with the electromagnetic shielding sealing door 9, and the lip-shaped silicone seal 13 provides a tight seal, effectively blocking external impurities and providing a clean unloading environment for materials, ensuring product quality. The electromagnetic shielding sealing door can also effectively shield electromagnetic interference, making the equipment suitable for unloading electromagnetically sensitive materials such as electronic materials and high-end pharmaceuticals, thus broadening its application range. During unloading, the cleaning and inflation valve fills the drying chamber with dry, anhydrous gas, creating positive pressure. Driven by this positive pressure and in conjunction with the conveying unloading of the dual-shaft auger, unloading becomes faster and more efficient, improving unloading efficiency. At the same time, the bottom residual material is cleaned by the bottom positive pressure drive, reducing cleaning difficulty, minimizing hard damage to the inner cavity of the horizontal cylinder, and extending the equipment's lifespan.

[0029] The working process of this embodiment is as follows: The material unloading process begins with the self-priming feeding stage. Under the vacuum environment created by the vacuum pump, the material is automatically drawn into the vacuum drying chamber of the horizontal cylinder through the automatic suction valve. After the drying operation is completed, the unloading process begins. First, the vacuum pump is turned off, and then the cleaning and charging valve is opened. The external drying and anhydrous gas source is introduced into the vacuum drying chamber through this valve, changing the pressure inside the chamber to positive pressure. At this time, the drive motor is started, and the motor drives the lead screw through the reducer. The lead screw pushes the electromagnetic shielded sealing door to extend and retract linearly. At the same time, the unloading valve located at the bottom of the conical tube is opened. Under the action of positive pressure, the material flows towards the outlet with lower pressure. The built-in dual-shaft auger system continues to operate, and its interlaced spiral blades rotate in opposite directions under the drive of the motor, playing a role in stirring and conveying the material, helping the material to smoothly reach the unloading port.

[0030] For small amounts of material that are difficult to convey by the dual-shaft auger system and adhere to the bottom of the horizontal cylinder, the gas pressure injected through the cleaning and charging valve can be further increased. Under the strong push of positive pressure, these residual materials are blown to the unloading device. After unloading, the drive motor reverses, pushing the electromagnetic shielding sealing door back to its original position and closing it via a lead screw. The lip-shaped silicone seal covering the surface of the electromagnetic shielding sealing door and its tight fit with the sealing buffer chamber achieve a seal, maintaining the cleanliness of the vacuum drying chamber and preventing external impurities from entering, thus preparing for the next round of drying and unloading. The entire unloading process, under strict sealing and precise pressure and power control, ensures that the material is not contaminated and completes the unloading operation efficiently.

[0031] The above description of the embodiments is only for the purpose of helping to understand the present utility model, but does not constitute a limitation of the present utility model. Those skilled in the art can make various changes, modifications, substitutions, integrations and variations without departing from the spirit and scope of the present utility model. Therefore, all equivalent technical solutions should also fall within the scope of the present utility model and should be defined by the claims.

Claims

1. A vacuum drying equipment vacuum breaking unloading system, characterized in that, include: A horizontal cylindrical body, the inner cavity of which is a vacuum drying chamber, and a dual-shaft auger system is installed inside the vacuum drying chamber; A vacuum system, including a vacuum pump, which is connected to the vacuum drying chamber via a pipeline; The horizontal cylindrical body is connected to a sealed discharge structure, which includes: A sealed unloading device, one end of which is connected to the bottom of the horizontal cylinder, and the other end of which is connected to the storage tank through a tapered tube; The sealing unloading device is equipped with an electromagnetic shielding sealing door, which is linearly extended and retracted by a reducer-driven screw. The surface of the electromagnetic shielding sealing door is covered with a lip-shaped silicone seal and an electromagnetic shielding mesh. It also includes an automatic suction valve and a cleaning and air filling valve connected to the vacuum drying chamber, wherein the cleaning and air filling valve is connected to an external drying and waterless air source.

2. The vacuum drying equipment vacuum breaking unloading system according to claim 1, characterized in that, The material cleaning and air filling valve is located at the end and bottom of the upstream head of the horizontal cylinder in the discharge direction.

3. The vacuum drying equipment vacuum breaking unloading system according to claim 1, characterized in that, The sealed discharge structure connects the downstream end and bottom of the horizontal cylinder in the discharge direction.

4. The vacuum drying equipment vacuum breaking unloading system according to claim 1, characterized in that, The sealed unloading device includes a sealed buffer chamber, the lower part of which is connected to the tapered tube. The sealed buffer chamber is in close contact with the discharge end of the horizontal cylinder. One side of the sealed buffer chamber is connected to the horizontal cylinder at the discharge port of the horizontal cylinder. An electromagnetic shielding sealing door is provided in the sealed buffer chamber corresponding to the discharge port.

5. The vacuum drying equipment vacuum breaking unloading system according to claim 4, characterized in that, A drive motor is installed on the other side of the sealed buffer cavity. The drive motor is connected to a lead screw through a reducer. The lead screw passes through the side wall of the sealed buffer cavity and connects to the electromagnetic shielding sealing door.

6. The vacuum drying equipment vacuum breaking unloading system according to claim 1, characterized in that, A shielding mesh is installed on one side of the sealing opening of the electromagnetic shielded door.

7. The vacuum drying equipment vacuum breaking unloading system according to claim 4, characterized in that, A lip-shaped silicone seal is fitted onto the lead screw on the other side of the sealed buffer cavity.

8. The vacuum drying equipment vacuum breaking unloading system according to claim 4, characterized in that, The upper part of the tapered tube is connected to the sealed buffer chamber, and the lower part is connected to the unloading valve. The unloading valve is connected to the storage tank through the unloading pipe.

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