SU1476298A1 - Heat-exchange tube - Google Patents

Abstract

The invention relates to heat engineering and can be used in heat exchange devices operating in a corrosive environment. The purpose of the invention is to intensify heat transfer and increase the operational reliability of the pipe when operating in corrosive environments. A multilayer protective coating 3 is applied to the surface of the pipe 1 and transverse ribs 2. The ribs at the points of contact with the pipe have slots 4, the cavities of which are filled with coating material, and the portions 5 of the ribs between the slots are bent at an angle to the pipe surface. The material of the layer deposited on the surface of the pipe, the ribs and the cavities filling the cavity has a thermal conductivity close to that of the pipe material and the ribs. The slits can be made either in the form of narrow slits or in the form of semicircles. This embodiment allows for a tight fit of the fins on the pipe, to improve their thermal contact and to provide the necessary durability of the coating with variable t-modes of operation. 3 hp ff, 6 ill.

Description

FIG. 2

The invention relates to heat engineering and can be used in heat transfer devices operating in a corrosive environment.

The purpose of the invention is to intensify heat exchange 5 and increase operational reliability when working in corrosive environments.

FIG. 1 depicts the described heat exchange tube; in fig. 2 - the same

The diameter is smaller than the outer diameter of the pipe 1 and the slots 4 are made. Then the fins 2 are fitted onto the pipe 1. When seated, the sections 5 are bent in the direction opposite to the advancement of the edge 2 along the pipe 1. Due to the spring properties of the material, the fins 2 sections 5 tightly cover the outer surface of the pipe 1. Making cuts 4 in the form of semicircles allows to obtain

cross section; in fig. 3 — node I sections 5 with good spring properties of FIG. one; in fig. 4 - the same, execute you and ensure a tight fit of the ribs 2 on the pipe 1.

In operation, one of the coolants flows inside the pipe 1, and the other,. including corrosive environments, washes the outside of the ribs 2. Heat transfer occurs through the wall of the pipe 1.

The use of a highly heat-conducting material as the first layer 6 of coating 3 improves thermal contact.

There are slots 4, the cavities of which are filled with 20 ribs 2 with pipe 1 and provide the covering material 3 with the necessary materials, and the sections 5 with the required resistance of the coating with variable ber 2 between the slots 4 are bent at an angle to the surface of the pipe 1. Protective corrosion-resistant coating 3 can be made multi-layered, and the material of the layer 6 deposited on the surface of the pipe 1, the ribs 2 and the slot-filling cavity has a thermal conductivity close to the warm protective coating of the multi-layer; in fig. 5 — rib with slots in the form of narrow slits; in fig. 6 - the same, with slits in the form of semicircular holes.

The heat exchange pipe 1 contains transverse ribs 2 adjacent to its surface, and a protective coating 3 applied to the surface of pipe 1 and ribs 2. Ribs 2 in places of contact with pipe 1 have 25

on temperature modes of operation.

Claims (4)

1. A heat exchange tube with transverse fins adjacent to its surface and a protective coating applied to the surface of the pipe and fins, characterized by and the fins 2 can be used in the contention that, for the purpose of intensification, thermal construction steels, such as art. 20, art. 3, as well as aluminum and its alloys. As the first layer 6, non-ferrous metals can be used, for example copper, applied by spraying or electroplating exchange of increased operational reliability when operating in corrosive environments, the edges at the points of contact with the pipe have slots, the cavities of which are filled with the coating material, and the areas of the edges The diameter is smaller than the outer diameter of the pipe 1 and the slots 4 are made. Then the fins 2 are fitted onto the pipe 1. When seated, the sections 5 are bent in the direction opposite to the advancement of the edge 2 along the pipe 1. Due to the spring properties of the material, the fins 2 sections 5 tightly cover the outer surface of the pipe 1. Making cuts 4 in the form of semicircles allows to obtain areas 5 with good spring properties and ensure a tight fit of the fin 2 with the pipe 1 and ensure the durability of the coating when on temperature modes of operation.  20 ribs 2 with pipe 1 and ensured durability of the coating when p 25 Invention Formula fins 2 with pipe 1 and provide the necessary durability of the coating with variable 1. A heat exchange tube with transverse fins adjacent to its surface and a protective coating applied to the surface of the pipe and fins, characterized by In order to intensify heat with the aim of intensifying heat exchange to increase operational reliability when working in corrosive environments, the fins at the points of contact with the pipe have slots, the cavities of which are filled with coating material, and the fins are the path, and the second layer can be the ground between the slits, bent at an angle to the sweat coverings or heat-resistant enamels on the surface of the pipe. 2. A pipe according to claim 1, characterized in that the protective coating is multi-layered, whereby the material of the layer applied to the surface of the pipe, the ribs and the backing, or combinations of these materials. When making the coating 3 with a single layer, the above-mentioned enamels are used as its material. The slits 4 can be made in the form of narrow slits of a length from one to three thicknesses of the rib 2, as well as in the form of semicircles with a radius greater than the thickness of the rib 2. 40 has a thermal conductivity, close to the thermal conductivity of the material of the pipe and ribs. 3. The pipe according to claim 1, characterized in that that the slits are made in the form of narrow slits. In the process of manufacturing the rib 2, 45 4. The pipe according to claim 1, characterized in that it is provided with a hole under the pipe 1, having the cuts made in the form of semicircles. 2. A pipe according to claim 1, characterized in that the protective coating is multi-layered, the material of the layer applied to the surface of the pipe, the ribs and has a thermal conductivity, close to the thermal conductivity of the material of the pipe and ribs. 3. The pipe according to claim 1, characterized in that FIG. 3 / s ij ss / s. , /, .. s FIG. f FIG. H