RU36070U1 - Longer cleaning tank - Google Patents

Description

DESCRIPTION OF A USEFUL MODEL

Longer cleaning tank

This utility model relates to technological equipment of the dairy and other branches of the food industry.

For the production of food products with significant viscosity, a vertical tank with a scraper type 1 mixing device is known. The disadvantage of this tank is that the scrapers of the cleaning devices wear out relatively quickly during operation. This increases the duration of the cooling of the product in the tank due to incomplete cleaning of the cooled layers from the cooling surface. Therefore, scrapers in a known reservoir have to be replaced relatively often with new ones.

For the production of food products with medium and low viscosity, vertical type tanks with paddle mixers 1 are known. A disadvantage of the known tanks is that there is a relatively large gap between the edge of the blade and the inner wall of the tank. As a result, during the operation of such a reservoir, a wall layer of the product is formed, poorly mixed with the bulk of the product. This negatively affects the heat transfer coefficient on the product side. Especially strongly wall layer worsens heat transfer during processing in tanks with paddle mixers of products with medium viscosity.

The technical result that can be achieved in the proposed utility model is as follows. This utility model can be used both for processing foods with high viscosity and for processing products with medium and low viscosity. When using this tank for processing food products with high viscosity, the mixer works like a scraper. In this case, the technical result consists in lengthening the service life of the cleaning devices and faster cooling of the product. When using the proposed reservoir for processing products with medium and low viscosity, the scrapers are located in the immediate vicinity of the cylinder wall of the reservoir, but the walls themselves do not touch. In this case, the technical result consists in increasing the heat transfer coefficient on the product side by reducing the size of the wall layer.

6 A23 C 3/04

the tank shown in FIG. 1 and 2.

In FIG. 1 and 2 are indicated: 1 - upper bearing; 2 - hatch; 3 cover; 4 - pipe for refrigerant discharge; 5 - upper thrust; 6 - upper holder; 7 - upper lock nut; 8 - upper thread; 9 - shaft; 10 hexagon; 11 - lower thread; 12 - plate; 13 - scrapers; 14 - chill; a shirt; 15 - pipe for product outlet; 16 - supports; 17 bottoms; e; 18 - lower bearing; 19 - flow distributor; 20 - locking bolts; 21 - pipe for supplying the product; 22 - cylinder; 23 - swivel joints; 24 - eyes; 25 - lower locknut; 26 - lower holder; 27 - lower thrust; 28 - pipe for supplying a coolant; 29 bases of scraper devices.

The tank consists of a cylinder 22, outside of which there is a cooler; shirt 14 with a pipe for supplying coolant 28 and a pipe for removing coolant 4. The tank has a bottom; e 17 and a cover 3, and is mounted on supports 16. The scraper-mixing device is mounted on the shaft 9 Shaft 9 is fixed in the lower part by an angular contact bearing 18, and in the upper part by a radial bearing 1. The upper thread 8 is cut in the upper part of the shaft 9, and the lower thread 11 is cut in the lower part. The hexagon 10 is welded to the shaft in the middle part of the shaft. by which wasp w; there is a rotation of the shaft when installing the scrapers.

The scraper devices consist of bases 29, plates 12 and scrapers 13. The eyes 24 are welded to the bases of the scraper devices 29.

In the upper holder 6 and the lower holder 26 there is a central hole with an internal thread. The direction and pitch of the thread in the hole of the upper holder 6 are the same as that of the upper thread 8, the direction and pitch of the thread in the hole of the lower holder 26 is the same as that of the lower thread 11. Using the thread cut into the central holes of the holders, the upper holder 6 is screwed onto the upper thread 8, the lower holder 26 is screwed onto the lower thread 11. The holders 6 and 26 are fixed to the thread with lock nuts 7 and 25. There are four eyelets around the perimeter of the holders 6 and 26. Nroushins are located relative to each other at an angle of 90 °. The upper rods 5 are pivotally fixed in the eyes of the upper holder, and the lower rods 27 in the eyes of the lower holder. The opposite ends of the upper and lower rods are hinged 23 in the eyes 24.

The pressing of the scrapers 13 against the wall of the cylinder 22 and their moving away from the wall is carried out by turning the holders 6 and 26 relative to the shaft 9. The length of the sections of the shaft on which the upper thread 8 and

the lower thread 11 must be such as to ensure movement of the scrapers 13 from their full pressing against the wall of the cylinder of the tank to a gap between the wall of the tank and the front edge of the scrapers of 4 mm.

For tanks designed for clockwise rotation of the shaft, the upper thread 8 is cut to the left, and the lower 11 to the right. For tanks designed to rotate the shaft counterclockwise, the upper thread 8 is cut to the right, and the lower 11 to the left. This direction of threading is made from the following considerations. If, due to the negligence of the operating staff, the locknuts 7 and 25 are not tightened tightly, then their spontaneous unscrewing is possible. In this case, the holders 6 and 26 due to the resistance of the mixed product will turn relative to the shaft in the direction opposite to the rotation of the shaft. With the indicated ratio of the direction of rotation of the shaft and the direction of threading, the scraper devices will move to the center of the tank due to the rotation of the holders relative to the shaft. This will lead to a decrease in the heat transfer coefficient, which will be immediately noted by control and measuring devices. However, no breakdown will occur. In the opposite direction of threading in the case of spontaneous unscrewing of the lock nuts 7 and 25 of the scraper 13 due to the rotation of the holders relative to the shaft, they will crash into the walls of the cylinder 22, which will cause damage to the tank and mixing devices.

A flow distributor 19 is connected to the bottom of the shaft 9 with the help of locking bolts 20. The flow distributor provides the flow in the center of the tank from top to bottom, from the center to the periphery in the bottom of the tank and from bottom to top. The location of the flow distributor in the lower part of the tank allows us to provide the described direction of product movement with both full and partial filling of the tank.

For penetration of maintenance personnel inside the tank, hatch 2 is used. Personnel penetrates into the tank through hatch 2 using a drain ladder.

The tank operates as follows. For processing high viscosity food products, the scrapers 13 are mounted close to the cylinder wall of the tank, and as they wear, the scrapers are periodically pushed to the cylinder wall. To process products of medium and low viscosity between the scrapers 13 and the cylinder wall of the tank 22, a clearance of K4 mm is left. In this case, the scrapers do not wear, and it is not necessary to push them to the walls.

The sliding and sliding of the scrapers is carried out by moving the holders 6 and 26 along the shaft 9. To do this, fix the hexagon 10 with a wrench and unscrew the lock nuts 7 and 25. Then, while continuing to hold the hexagon 10, rotate the holders 6 and 26 along the threads 8 and 11 until the desired degree pressing the scrapers 13 against the cylinder wall or until the necessary clearance is provided. After that, fix the hexagon 10 with a wrench and tighten the locknuts 7 and 25.

1. Surkov V.D., Lipatov N.N., Zolotin Yu.P. Technological equipment of the dairy industry. - M.: Light and food industry, 1983. - 432 p.

Literature

Claims (1)

A vertical type tank for cooling dairy and other viscous food products, containing a cylinder with a cooling jacket, a lid, a bottom, a hatch in the lid, nozzles for supplying and discharging the product and coolant, as well as a mixing device located in the cylinder of the tank, characterized in that to the central part of the shaft of the mixing device, a hexagon is welded, above and below which the thread is cut, the upper holder is screwed to the upper thread, the lower holder is screwed to the lower thread, the holders are screwed with internal thread cut in the hole located in the center of the holder, each holder is fixed with a lock nut, the holders have four eyes 90 ° apart from each other, the eyes are also welded to the base of the scrapers, the upper and lower holders are pivotally connected to the scraper through the eyes with rods, the length of the shaft sections on which the upper and lower threads are cut, should ensure the movement of the scrapers from their full pressing against the cylinder wall of the tank to a gap of 4 mm, while for tanks, p for clockwise rotation of the shaft, the thread cut above the hexagon is left, the thread cut below the hexagon is right, and for tanks designed to rotate the shaft counterclockwise, the thread cut above the hexagon is right, the thread cut below the hexagon is left, the flow distributor is located at the bottom of the tank.