PL214340B1 - Cooler worm screw - Google Patents

Description

(21) Filing Number: 387361 ^{(51) Int.Cl.}

F23J 1/06 (2006.01)

Patent Office of the Republic of Poland (22) Date of filing: February 27, 2009 (54)

Radiator snail

(73) The right holder of the patent: APC PRESMET SPÓŁKA Z OGRANICZONĄ ODPOWIEDZIALNOŚCIĄ, Opole, PL (43) Application was announced: 30.08.2010 BUP 18/10 (45) The grant of the patent was announced: 31.07.2013 WUP 07/13 (72) Inventor (s): JANUSZ JABŁOŃSKI, Bogatynia, PL BOLESŁAW ŁUKASZEWICZ, Zgorzelec, PL JANUSZ ZAJĄCZKOWSKI, Opole, PL JACEK CHOJKA, Jelenia Góra, PL TADEUSZ SAWICKI, Opole, PL ANDRZEJ WRÓBLEWSKI, Katowice, PL

PL 214 340 B1

Description of the invention

The subject of the invention is a cooling screw adapted to cooling slag and ash with high temperatures of 1100 ° C to 500 ° C. Coolers of this type are used in power plants and combined heat and power plants as well as in the reverse cycle as heaters in various types of technological processes used in the processing industry. Due to the necessity to limit the dimensions, and at the same time to obtain high thermal efficiency, these coolers have both a cooled shaft and spiral ribbons. Especially coolers with cooled ribbons are structurally and technologically complex. This is manifested by high production costs and, at the same time, reduced durability and reliability in operation.

For this reason, new solutions are sought, more favorable than those used so far. Large temperature differences between the cooling and cooled media cause thermal shocks, which is manifested by rapid dimensional changes.

In practice, this usually causes the screw to buckle, which results in abrasion of the radiator housing.

The object of the invention is the use of axial expansion compensation in the construction of the worm screw.

Careful observation of the operation of the coolers in question allowed to determine the location and construction of the expansion joints.

The cooling screw according to the invention is characterized in that the screw core has a spiral gap between the cooled ribbons, tightly covered with a compensator.

Preferably, the cooling screw has a compensator in the form of a flattened tube with an outer diameter of 3 to 8 times the size of a spiral gap with a cut-out wall with a wrap angle of 90 ° to 180 ° and a wall thickness of 0.1 to 0.6 of the screw core thickness. .

Preferably, the screw core is mounted on the drive shaft with a radial play with a gap of 0.1 to 0.3 times the wall thickness of the screw core. It should be emphasized that the cooling screw according to the invention is more labor-consuming in production compared to the previously used screws.

Nevertheless, it is advantageous that the durability of the cooling screw according to the invention will be up to two times higher than those used so far. The economic effect results from the difference in total costs in the production and operation of coolers with the previously used screws and the screw according to the invention. This economic effect exceeds the production cost of the cooling screw according to the invention, which is its main advantage.

The subject of the invention is shown in the drawing with an exemplary embodiment, in which Fig. 1 shows a cross-section of a screw.

Cooler screw, the screw core 1 of which has a spiral gap 3 between the cooled ribbons 2 and is sealed with a compensator 4. The compensator 4 is in the form of a flattened pipe 5 with an outer diameter d of 3 to 8 of the size S of a spiral gap 3 with a cut-out wall 6 with a wrap angle ai a size from 90 ° to 180 ° and a thickness g _{1 of the} wall 6 equal to 0.1 to 0.6 of the thickness g _{2 of the} core of 1 screw.

The core 1 of the screw is mounted on the drive shaft 7 with a radial play with a gap S1 equal to 0.1 to 0.3 of the thickness g2 of the wall of the core 1 of the screw.

Claims (3)

Patent claims 1. Cooler screw with a hollow core on which cooled spiral ribbons are wound, adapted to cool the slag and ash, characterized in that the screw core (1) between the cooled ribbons (2) has a spiral gap (3) tightly covered with a compensator (4). 2. The radiator worm according to claim 3. The compensator (4) is in the form of a flattened pipe (5) with an outer diameter d equal to 3 to 8 of the slot size (3) with a cut-out wall (6) with a wrap angle α and size from 90 ° to 180 °. ° and a thickness g1 of the wall (6) equal to 0.1 to 0.6 of the thickness g2 of the screw core (1). 3. The radiator worm according to claim The method according to claim 1 or 2, characterized in that the screw core (1) is mounted on the drive shaft (7) with a radial play with a gap S1 equal to 0.1 to 0.3 of the wall thickness g2 of the screw core (1).