High-speed wet mixing granulator sealing device capable of being automatically cleaned

Abstract

The utility model discloses a high-speed wet mixing granulator sealing device capable of being automatically cleaned, which comprises a cylinder body, a stirring paddle is arranged in the cylinder body, one end of the stirring paddle is fixedly connected with a connector, an air seal and cleaning cavity is arranged in the connector, and the air seal and cleaning cavity is fixedly connected with the cylinder body. An air inlet is formed in the air sealing and cleaning cavity, a water inlet is formed in the other symmetrical air sealing and cleaning cavity, and a stirring paddle transmission shaft sealing assembly is arranged on the lower bottom wall of the cylinder body. By means of the structure, under the combination of air seal and transmission seal, materials can be effectively prevented from entering the air seal and the interior of the cleaning cavity in the moving time, friction pollution of the materials can be effectively prevented to a certain extent, and in addition, the air inlet and the water inlet can be alternately opened and closed, so that the cleaning efficiency is improved. Air and water are alternately used for flushing the air seal and cleaning the cavity, and rapid and automatic cleaning is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing devices, in particular to a sealing device for a high-speed wet mixing granulator which can be automatically cleaned. Background Art

[0002] Wet mixing granulator is mainly used in the pharmaceutical industry. It is a special equipment for wet mixing and granulating medicinal powder, adhesive, etc. It is also suitable for granulating powder materials in food and chemical industries. It has multiple functions such as mixing and granulating. It mainly processes products of powder materials with large viscosity and dry powder materials. The materials are subjected to multi-dimensional shear under stirring, so that they are fully mixed in a flowing state. Then, the adhesive is injected through the spray gun system to form uniform wet granules. However, when stirring the materials, the stirring shaft needs to be sealed to effectively prevent the leakage of the materials. For example, a Chinese patent discloses an axial sealing device for the chopping shaft of a wet mixing granulator, and its application number is : CN201820419711.6, the side walls of the first sealing ring and the second sealing ring are provided with reinforcement strips, and the outer side walls of the first sealing ring and the second sealing ring are sleeved with reinforcement rings. The device effectively improves the sealing performance of the axial sealing device of the chopping shaft through a flexible sealing sleeve and a seal, and overcomes the problem of material leakage due to sealing failure. However, when cleaning the stirring system, the stirring paddle needs to be removed from the stirring transmission device to expose the sealing device and clean the sealing device. For larger wet mixing granulators, the stirring paddles they are equipped with are also larger and heavier. They need to be removed for cleaning and then reinstalled with the help of lifting equipment, which is relatively inconvenient and affects the cleaning efficiency. Utility Model Content

[0003] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art and to provide a sealing device for a high-speed wet mixing granulator that can be automatically cleaned. The sealing device can effectively prevent materials from entering the air seal and the interior of the cleaning chamber during movement through the combination of an air seal and a transmission seal, and can effectively prevent friction contamination of the materials to a certain extent. In addition, the air inlet and the water inlet can be switched on and off to achieve air and water alternating flushing of the air seal and the cleaning chamber, thereby facilitating rapid automatic cleaning.

[0004] The present invention also provides a sealing device for a high-speed wet mixing granulator with automatic cleaning, comprising: a cylinder body, a stirring paddle is provided inside the cylinder body, one end of the stirring paddle is fixedly connected to a connector, an air seal and a cleaning cavity are provided inside the connector, an air inlet is provided inside the air seal and the cleaning cavity, a water inlet is provided inside the other symmetrical air seal and the cleaning cavity, a mounting groove is provided inside the connector, the connector is fixedly connected to the stirring paddle drive shaft through the mounting groove, and a stirring paddle drive shaft sealing assembly is provided on the lower bottom wall of the cylinder body. Through the above components, through the combination of the air seal and the transmission seal, it is possible to effectively prevent the material from entering the air seal and the cleaning cavity during the movement time, and to a certain extent, effectively prevent the friction contamination of the material. In addition, the air inlet and the water inlet can be rotated to switch the air inlet and the water inlet, so as to realize the air and water rotation flushing of the air seal and the cleaning cavity, which is convenient for rapid automatic cleaning.

[0005] According to the utility model, the sealing device of the high-speed wet mixing granulator with automatic cleaning is provided with two air-sealing and cleaning chambers symmetrically distributed on both sides of the agitator drive shaft. These components can prevent material leakage and cooperate with the automatic cleaning of the parts.

[0006] According to the utility model, a self-cleaning sealing device for a high-speed wet-mixing granulator comprises a paddle drive shaft sealing assembly comprising a compression cap, the interior of which is threadedly connected to the paddle drive shaft, and a double-layered toothed PTFE seal disposed on the exterior of the paddle drive shaft. The double-layered PTFE seal, facing away from the compression cap, is provided with a double-layered lip seal. These components provide static and dynamic sealing of the paddle drive shaft via the paddle drive shaft sealing assembly.

[0007] According to the utility model, a self-cleaning sealing device for a high-speed wet-mixing granulator comprises a bottom fixing plate fixedly mounted on the side of the double-layer lip seal away from the double-layer toothed PTFE seal. The outer portion of the bottom fixing plate is rotatably connected to the cylinder body. With these components, the double-layer toothed PTFE seal exhibits a low friction coefficient and excellent self-lubrication, achieving a reliable sealing effect under high-speed rotation and high-pressure conditions.

[0008] According to the utility model, a sealing device for a high-speed wet-mixing granulator capable of automatic cleaning is provided. The air inlet of the air-sealing and cleaning chamber is fixedly connected to an air inlet pipe, one end of which is tightly connected to the air inlet pipe. By connecting the air inlet pipe through the air inlet, air is introduced into the air-sealing and cleaning chamber, thereby achieving an airtight seal and preventing contamination caused by material leakage during the mixing process.

[0009] According to the utility model, a sealing device for a high-speed wet-mixing granulator capable of automatic cleaning is provided. The water inlet of the airtight seal and cleaning chamber is fixedly connected to a water inlet pipe, one end of which is tightly connected to the water inlet. By opening the inlet, water enters the airtight seal and cleaning chamber through the water inlet pipe, thereby cleaning the chamber and preventing material from remaining inside and affecting the mixing effect of the next round.

[0010] Beneficial effects: Compared with the existing technology, this new type of automatically cleanable high-speed wet mixing granulator sealing device can effectively prevent materials from entering the air seal and the inside of the cleaning cavity during movement through the combination of air seal and transmission seal, and can effectively prevent friction contamination of materials to a certain extent. In addition, the air inlet and water inlet can be rotated to flush the air seal and the cleaning cavity, which is convenient for rapid automatic cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0012] Figure 1 This is a complete structural diagram of the sealing device of the automatic-cleaning high-speed wet-mixing granulator of the utility model;

[0013] Figure 2 This is a structural diagram of the sealing assembly of the agitator drive shaft of the automatic-cleaning high-speed wet-mixing granulator sealing device of the utility model;

[0014] Figure 3 This is a diagram showing the structure of the air seal and cleaning cavity of the sealing device of the high-speed wet mixing granulator with automatic cleaning capability of the utility model;

[0015] Figure 4 This is a structural diagram of the compression cover of the sealing device of the high-speed wet mixing granulator with automatic cleaning according to the utility model;

[0016] Figure 5 This is a structural diagram of a double-layer toothed PTFE seal of the automatic-cleaning high-speed wet-mixing granulator sealing device of the utility model;

[0017] Figure 6 This is a structural diagram of the double-layer lip seal and bottom fixed plate of the sealing device of the automatic cleaning high-speed wet mixing granulator of the utility model.

[0018] Legend:

[0019] 1. Cylinder body; 2. Agitator; 3. Agitator drive shaft; 4. Agitator drive shaft sealing assembly; 5. Air inlet; 6. Water inlet; 7. Air sealing and cleaning chamber; 8. Compression cover; 9. Double-layer toothed PTFE seal; 10. Double-layer lip seal; 11. Bottom fixing plate; 12. Connector; 13. Air inlet pipe; 14. Water inlet pipe. DETAILED DESCRIPTION

[0020] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0021] Reference Figure 1-6 The embodiment of the utility model is a sealing device of a high-speed wet mixing granulator with automatic cleaning, which includes: a cylinder body 1, a stirring paddle 2 is provided inside the cylinder body 1 to stir the material, one end of the stirring paddle 2 is fixedly connected to a connecting head 12, the stirring paddle transmission shaft 3 is fixed, and the stirring paddle 2 is connected to the stirring paddle transmission shaft 3, and an airtight sealing and cleaning cavity 7 is provided inside the connecting head 12 for airtight sealing and automatic cleaning. An air inlet 5 is provided inside the airtight sealing and cleaning cavity 7, which is connected to the air inlet pipe 13, and another symmetrical airtight sealing and cleaning cavity 7 is provided inside the water inlet 6, which is connected to the water inlet pipe 14, and an installation groove is provided inside the connecting head 12, and the connecting head 12 is fixedly connected to the stirring paddle transmission shaft 3 through the installation groove, and the stirring paddle 2 is driven to rotate by rotating the power. The lower bottom wall of the cylinder body 1 is provided with a stirring paddle transmission shaft sealing assembly 4.

[0022] There are two air-sealing and cleaning chambers 7 and they are symmetrically distributed on both sides of the agitator drive shaft 3. The air inlet 5 of the air-sealing and cleaning chamber 7 is fixedly connected with an air inlet pipe 13, a pipe for conveying water, one end of the air inlet pipe 13 is tightly connected to the air inlet pipe 13, a ventilation pipe, and the water inlet 6 of the air-sealing and cleaning chamber 7 is fixedly connected with a water inlet pipe 14, and one end of the water inlet pipe 14 is tightly connected to the water inlet 6.

[0023] The agitator drive shaft sealing assembly 4 includes a clamping cover 8, the interior of the clamping cover 8 is threadedly connected to the agitator drive shaft 3, which has a fixing function to ensure the sealing effect. The outside of the agitator drive shaft 3 is provided with a double-layer toothed PTFE seal 9, which has a low friction coefficient and good self-lubricating properties, and can improve the sealing effect during movement. The double-layer toothed PTFE seal 9 is provided with a double-layer lip seal 10 on the side away from the clamping cover 8, which can prevent the entry of pollutants such as dirt, dust and water, and has a protective effect. The double-layer lip seal 10 is fixedly installed with a bottom fixing plate 11 on the side away from the double-layer toothed PTFE seal 9 to fix the entire sealing assembly, and the outside of the bottom fixing plate 11 is rotatably connected to the cylinder body 1.

[0024] Working principle: First, open the air inlet 5 to allow the gas to enter the air seal and cleaning cavity 7 through the air inlet pipe 13, and at the same time close the water inlet 6 to achieve the sealing of the agitator drive shaft 3, and use the agitator seal assembly 4 to achieve static and dynamic sealing of the agitator drive shaft 3, and then add the material to the inside of the cylinder 1, start the power source to rotate the agitator 2, at this time, under the combination of air seal and transmission seal, it can effectively prevent the material from entering the inside of the air seal and cleaning cavity 7 during the movement time, thereby preventing the material from generating friction contamination. After the material is stirred, when the material is discharged from the cylinder 1 for cleaning, the air inlet 5 and the water inlet 6 are switched on and off in rotation, thereby realizing the air and water rotation flushing of the air seal and cleaning cavity 7, so that automatic cleaning can be completed.

[0025] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A sealing device for a high-speed wet mixing granulator capable of automatic cleaning, characterized in that: include: A cylinder body (1) is provided with a stirring paddle (2) inside the cylinder body (1), one end of the stirring paddle (2) is fixedly connected to a connector (12), an air-sealing and cleaning cavity (7) is provided inside the connector (12), an air inlet (5) is provided inside the air-sealing and cleaning cavity (7), a water inlet (6) is provided inside the other symmetrical air-sealing and cleaning cavity (7), a mounting groove is provided inside the connector (12), the connector (12) is fixedly connected to a stirring paddle transmission shaft (3) through the mounting groove, and a stirring paddle transmission shaft sealing assembly (4) is provided on the lower bottom wall of the cylinder body (1).

2. The automatic cleaning sealing device of a high-speed wet mixing granulator according to claim 1, characterized in that: There are two air-sealing and cleaning chambers (7) symmetrically distributed on both sides of the stirring paddle transmission shaft (3).

3. The automatic cleaning sealing device of a high-speed wet mixing granulator according to claim 1, characterized in that: The stirring paddle drive shaft sealing assembly (4) comprises a pressing cover (8), the interior of the pressing cover (8) is threadedly connected to the stirring paddle drive shaft (3), the exterior of the stirring paddle drive shaft (3) is provided with a double-layer toothed polytetrafluoroethylene seal (9), and a double-layer lip seal (10) is provided on the side of the double-layer toothed polytetrafluoroethylene seal (9) away from the pressing cover (8).

4. The automatic cleaning sealing device of a high-speed wet mixing granulator according to claim 3, characterized in that: A bottom fixing plate (11) is fixedly mounted on the side of the double-layer lip seal (10) away from the double-layer toothed polytetrafluoroethylene seal (9), and the outside of the bottom fixing plate (11) is rotatably connected to the cylinder body (1).

5. The automatic cleaning sealing device of a high-speed wet mixing granulator according to claim 1, characterized in that: The air inlet (5) of the air-sealing and cleaning chamber (7) is fixedly connected to an air inlet pipe (13), and one end of the air inlet pipe (13) is tightly connected to the air inlet pipe (13).

6. The automatic cleaning sealing device of a high-speed wet mixing granulator according to claim 1, characterized in that: The water inlet (6) of the airtight sealing and cleaning cavity (7) is fixedly connected to a water inlet pipe (14), and one end of the water inlet pipe (14) is tightly connected to the water inlet (6).

Images