Large vertical fermentation tank

Abstract

The utility model discloses a large vertical fermentation tank which comprises a tank body, a stirring shaft is arranged in the tank body, at least two layers of stirrers are mounted on the stirring shaft, an intermediate bearing is arranged on the stirring shaft in a penetrating manner, the intermediate bearing is arranged between two adjacent layers of stirrers, the intermediate bearing comprises a shaft protecting sleeve, a bearing sleeve, a bearing seat and a base, the shaft protecting sleeve is mounted on the stirring shaft, and the bearing sleeve is mounted on the bearing seat. The bearing sleeve is installed between the bearing seat and the shaft protecting sleeve, limiting parts extending outwards are arranged on the top and bottom sides of the outer wall of the bearing sleeve, the bearing seat comprises a vertical part and a horizontal part connected to the bottom side of the outer wall of the vertical part, a limiting corner matched with the base is arranged at the bottom of the connecting position of the vertical part and the horizontal part, and the inner side of the vertical part is connected with the limiting parts in a clamped mode. The horizontal part and the base are connected with a middle bracket through connecting bolts; two ends of the middle bracket are connected with the inner wall of the tank body. The large vertical fermentation tank disclosed by the utility model can effectively reduce the vibration of the stirring shaft in the operation process of equipment, prolongs the service life of the stirring shaft, and is simple in structure and convenient to install.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to a large vertical fermentation tank. Background Art

[0002] Fermentation tanks are industrial devices used for microbial fermentation and are widely used in dairy products, beverages, bioengineering, pharmaceuticals, fine chemicals and other industries. The top of the fermentation tank is designed with a feed port, a stirring device is set inside the tank, and a filtered air inlet is set at the bottom of the tank. During the fermentation process, the filtered fresh air is continuously input into the fermentation tank through a pump, and the stirring device continuously stirs the fermentation liquid to fully mix the various substances in the fermentation liquid.

[0003] With the rapid development of the fermentation industry and the expansion of the scale of the fermentation industry, fermentation tanks are increasingly developing towards large-scale development. In order to save space, most large fermentation tanks are currently in the shape of a "thin and tall" vertical structure. A motor installed on the top of the tank body drives a stirring shaft that runs through the entire tank body to drive the stirring blades for stirring. In this process, it is particularly important to ensure the stability of the stirring shaft. In the prior art, in order to avoid radial shaking of the lower end of the stirring shaft, a fixed seat is usually set at the center of the bottom wall of the tank body, and the end of the stirring shaft is installed in the fixed seat. Although this structure can improve the stability of the end of the stirring shaft, it has a certain impact on the stirring and mixing effect of the material at the bottom of the tank body, and also causes certain interference to the setting of the air inlet auxiliary device. Utility Model Content

[0004] The utility model aims to provide a large vertical fermentation tank to solve the problems existing in the prior art.

[0005] The purpose of the utility model is achieved as follows: a large vertical fermentation tank comprises a tank body, a stirring shaft is arranged in the tank body, at least two layers of agitators are installed on the stirring shaft, an intermediate bearing is passed through the stirring shaft, the intermediate bearing is arranged between two adjacent layers of agitators, the intermediate bearing comprises a shaft protection sleeve, a bearing sleeve, a bearing seat and a base, the shaft protection sleeve is installed on the stirring shaft, the bearing sleeve is installed between the bearing seat and the shaft protection sleeve, the outer wall of the bearing sleeve has outwardly extending limiting portions on both sides of the top and bottom, the bearing seat comprises a vertical portion and a horizontal portion connected to the bottom side of the outer wall of the vertical portion, a limiting angle matching the base is provided at the bottom of the connection position between the vertical portion and the horizontal portion, the inner side of the vertical portion is clamped with the limiting portion, the horizontal portion and the base are connected to the intermediate bracket by connecting bolts, and the two ends of the intermediate bracket are connected to the inner wall of the tank body.

[0006] The large vertical fermentation tank of the utility model can effectively reduce the vibration of the stirring shaft during the operation of the equipment and increase the service life of the stirring shaft by arranging specially designed intermediate bearings and intermediate brackets on two adjacent layers of agitators without arranging a bottom fixing seat of the stirring shaft, and has the advantages of simple structure and easy installation.

[0007] As a further improvement of the present invention, the stirring shaft adopts a segmented structure, and adjacent sections are connected by flanges. The flanges include a first flange welded and fixed to the lower end of the upper stirring shaft and a second flange welded and fixed to the upper end of the lower stirring shaft. The upper surfaces of the first flange and the second flange are both covered with reinforcing ribs, which improve the reliability and stability of the stirring shaft connection and reduce the vibration of the stirring shaft during the operation of the equipment.

[0008] As a further improvement of the present invention, the lower surface of the first flange and the upper surface of the second flange are provided with mutually matching stepped limiting structures to improve the alignment accuracy and connection efficiency.

[0009] As a further improvement of the utility model, the shaft protection sleeve and the bearing seat both adopt a split structure, the shaft protection sleeve has docking ears at both ends, and the outer wall of the bearing seat has a docking plate, which further improves the installation efficiency.

[0010] As a further improvement of the utility model, a motor seat is provided on one side of the top of the tank body, a driving motor is installed on the motor seat, a driving pulley is installed on the output shaft of the driving motor, a bracket is provided at the center of the top of the tank body, the upper end of the stirring shaft is inserted into the bracket and connected to the transmission shaft through a clamp shell coupling, a driven pulley is installed on the upper end of the transmission shaft, a transmission belt is connected between the driving pulley and the driven pulley, and the structure has high stability.

[0011] As a further improvement of the utility model, the agitator includes an intermediate agitator installed in the middle of the agitator shaft and a bottom agitator installed at the end of the agitator shaft, the agitator blades of the intermediate agitator are inclined, and the agitator blades of the bottom agitator are vertically arranged. Through the arrangement of the bottom agitator, it is ensured that the air intake at the bottom of the tank body can be fully dispersed and fully mixed with the material, and then the various substances in the fermentation liquid are fully mixed through the intermediate agitator to ensure the fermentation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of a large vertical fermentation tank of the utility model.

[0013] Figure 2 for Figure 1 Enlarged view of point K in the middle.

[0014] Figure 3 for Figure 1 Enlarged view of point P in the middle.

[0015] Among them, 1 tank body, 2 stirring shaft, 3 middle stirrer, 4 bottom stirrer, 5 motor seat, 6 driving motor, 7 driving pulley, 8 bracket, 9 clamp shell coupling, 10 transmission shaft, 11 driven pulley, 13 middle bearing, 13A shaft protection sleeve, 13B bearing sleeve, 13C bearing seat, 13D base, 13E docking ear, 13F docking plate, 14 middle bracket, 15 first flange, 16 second flange, 17 reinforcing rib plate. DETAILED DESCRIPTION

[0016] like Figure 1-3 The large vertical fermentation tank shown includes a tank body 1, a stirring shaft 2 is arranged in the tank body 1, and a three-layer stirrer is installed on the stirring shaft 2, which includes two middle stirrers 3 installed in the middle of the stirring shaft 2 and a bottom stirrer 4 installed at the end of the stirring shaft 2. The stirring blades of the middle stirrer 3 are arranged obliquely, and the stirring blades of the bottom stirrer 4 are arranged vertically. Through the arrangement of the bottom stirrer 4, it is ensured that the air intake at the bottom of the tank body 1 can be fully dispersed and fully mixed with the material, and then the various substances in the fermentation liquid are fully mixed through the middle stirrer 3 to ensure the fermentation effect.

[0017] A motor seat 5 is provided on one side of the top of the tank body 1, a driving motor 6 is installed on the motor seat 5, a driving pulley 7 is installed on the output shaft of the driving motor 6, a bracket 8 is provided at the center of the top of the tank body 1, the upper end of the stirring shaft 2 is inserted into the bracket 8 and connected to the transmission shaft 10 through a clamping shell coupling 9, a driven pulley 11 is installed on the upper end of the transmission shaft 10, a transmission belt is connected between the driving pulley 7 and the driven pulley 11, and the structure has high stability.

[0018] In order to ensure the stability of the stirring shaft 2 during the operation of the equipment, an intermediate bearing 13 is provided on the stirring shaft 2, and the intermediate bearing 13 is arranged between two adjacent layers of stirrers. Figure 2As shown, the intermediate bearing 13 includes a shaft protection sleeve 13A, a bearing sleeve 13B, a bearing seat 13C and a base 13D. The shaft protection sleeve 13A is installed on the stirring shaft 2 and connected to the stirring shaft 2 by a key. The bearing sleeve 13B is installed between the bearing seat 13C and the shaft protection sleeve 13A and is made of polytetrafluoroethylene. The outer wall of the bearing sleeve 13B has a limiting portion extending outward on both sides of the top and bottom. The bearing seat 13C includes a vertical portion and a horizontal portion connected to the bottom side of the outer wall of the vertical portion. The bottom of the connection position between the vertical portion and the horizontal portion is provided with a limiting angle that matches the base 13D. The inner side of the vertical portion is clamped with the limiting portion (compared with the prior art in which a limiting convex ring is provided on the outer wall of the bearing sleeve, and the limiting convex ring and the vertical portion of the bearing seat are plugged in, this clamping connection method has better stability), the horizontal portion and the base 13D are connected to the intermediate bracket 14 through connecting bolts, and the two ends of the intermediate bracket 14 are connected to the inner wall of the tank body 1. The shaft protection sleeve 13A and the bearing seat 13C are both split structures, with docking ears 13E at both ends of the shaft protection sleeve 13A, and a docking plate 13F on the outer wall of the bearing seat 13C. The inner side of the docking plate 13F is vertically welded and fixed to the outer wall of the vertical part of the bearing seat 13B, and the lower end of the docking plate 13F is vertically welded and fixed to the horizontal part of the bearing seat 13B, and at least two connection holes are provided in the longitudinal direction of the docking plate 13F.

[0019] The stirring shaft 2 adopts a segmented structure, and adjacent segments are connected by flanges. The flanges include a first flange 15 welded and fixed to the lower end of the upper stirring shaft 2 and a second flange 16 welded and fixed to the upper end of the lower stirring shaft 2. The upper surfaces of the first flange 15 and the second flange 16 are both ring-shaped with reinforcing ribs 17 surrounding the stirring shaft 2, further improving the reliability and stability of the connection of the stirring shaft 2 and reducing the vibration of the stirring shaft 2 during the operation of the equipment.

[0020] The present utility model is not limited to the above-mentioned embodiments. On the basis of the technical solution disclosed in the present utility model, technicians in this field can make some substitutions and deformations to some technical features therein according to the disclosed technical content without creative labor, and these substitutions and deformations are all within the protection scope of the present utility model.

Claims

1. A large vertical fermentation tank, comprising a tank body, wherein a stirring shaft is provided in the tank body, and at least two layers of stirrers are installed on the stirring shaft, characterized in that: An intermediate bearing is passed through the stirring shaft, and the intermediate bearing is arranged between two adjacent layers of agitators. The intermediate bearing includes a shaft protection sleeve, a bearing sleeve, a bearing seat and a base. The shaft protection sleeve is installed on the stirring shaft, and the bearing sleeve is installed between the bearing seat and the shaft protection sleeve. The outer wall of the bearing sleeve has limiting portions extending outward on both sides of the top and bottom. The bearing seat includes a vertical portion and a horizontal portion connected to the bottom side of the outer wall of the vertical portion. A limiting angle matching the base is provided at the bottom of the connection position between the vertical portion and the horizontal portion. The inner side of the vertical portion is clamped with the limiting portion. The horizontal portion and the base are connected to the intermediate bracket by connecting bolts, and both ends of the intermediate bracket are connected to the inner wall of the tank body.

2. The large vertical fermentation tank according to claim 1, characterized in that: The stirring shaft adopts a segmented structure, and adjacent segments are connected by flanges. The flanges include a first flange welded and fixed to the lower end of the upper stirring shaft and a second flange welded and fixed to the upper end of the lower stirring shaft. The upper surfaces of the first flange and the second flange are both covered with reinforcing ribs.

3. The large vertical fermentation tank according to claim 2, characterized in that: The lower surface of the first flange and the upper surface of the second flange are provided with mutually matching stepped limiting structures.

4. The large vertical fermentation tank according to claim 1, characterized in that: The shaft protection sleeve and the bearing seat both adopt a split structure, the two ends of the shaft protection sleeve are provided with docking ears, and the outer wall of the bearing seat is provided with a docking plate.

5. The large vertical fermentation tank according to any one of claims 1 to 4, characterized in that: A motor seat is provided on one side of the top of the tank body, a driving motor is installed on the motor seat, a driving pulley is installed on the output shaft of the driving motor, a bracket is provided at the center of the top of the tank body, the upper end of the stirring shaft is inserted into the bracket and connected to the transmission shaft through a clamping shell coupling, a driven pulley is installed on the upper end of the transmission shaft, and a transmission belt is connected between the driving pulley and the driven pulley.

6. The large vertical fermentation tank according to any one of claims 1 to 4, characterized in that: The stirrer comprises a middle stirrer installed in the middle of the stirring shaft and a bottom stirrer installed at the end of the stirring shaft. The stirring blades of the middle stirrer are arranged obliquely, and the stirring blades of the bottom stirrer are arranged vertically.

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