SU10016A1 - The spiral element of the superheater for grease pipes of locomotive, etc. boilers - Google Patents

Description

The present invention relates to a spiral element of a superheater for flue pipes of locomotive, etc., boilers and is aimed at improving the operation of these superheaters by increasing their heating surface and increasing heat transfer achieved by using spiral pipes of oval or circular cross section.

In the schematic drawing of FIG. 1 shows a longitudinal section of a fire tube with a superheater element placed in it; FIG. 2 is a cross section of the superheater element along the line CD in FIG. 1, fig. 3 is a cross section of the inlet and outlet pipes of the element along the line DE in FIG. 1, fig. 4 shows the form of the element with the use of three round helically bent pipes and one, also spiral, reverse pipe; FIG. The 5th element of the element from the end of the smoke tube, FIG. 6 is a cross-section of the element along the line b, in FIG. 4, FIG. 7-shape element with the use of four round bent

pipes and one, also spiral, return pipe.

Steam through the inlet pipe W (Fig. 1) of countercurrent A enters the superheater element formed by two spirals L and L, parallel to twisted of flattened pipes. The use of oval-shaped pipes and the separation of a jet of steam into two by passing it through two pipes increases the heating surface of the element. On a long spiral path of pipes, l l l pairs, mixing vigorously, heats up and goes out to the hook-bent and connected to these pipes end of the centrally located straight outlet pipe m and is led along it to the collecting chamber.

In the embodiment of the element shown in FIG. 4-7, the steam from the introductory tube o (fig. 4) or o (fig. 7) enters respectively into three or four spirally bent round tubes n, n ..., from which it comes out through one reverse of the same section, with the same pitch, but a correspondingly larger pipe P (P) into the collective j chamber. In these cases, by directing steam in 3, 4 jets, a large heating surface is reached, and removing the return pipe from the axial direction will allow freer passage of hot gases washing the superheater.

The subject of the patent.

1. The spiral element of the superheater for the fire tubes of steam locomotive, etc., boilers, characterized in that the element (Fig. 1-3) is formed from two parallel spirals twisted from flattened pipes and attached to the inlet tube and to the hook-like front bent end 3 of a centrally located steam outlet pipe l.

2. Modification of the element described in paragraph 1, characterized by the use (Fig. 4-7) of three or four round instead of two flat, spiral pipes, with which, instead of a forward return pipe, the same spiral pipe of the same pitch is used, and in the main spiral pipes.