RU172499U1 - HORIZONTAL TYPE NETWORK CAMERA - Google Patents

Abstract

The utility model relates to the power system, to horizontal type network heaters, which are used in heating plants for heating network water. bottoms, with inspection hatches made in it and longitudinal partitions between passage chambers fixed by a welded joint HAND to the tube plate and pins to the bottom. Inspection hatches may not be available. Thus, the use of the claimed horizontal chamber water heater water chamber allows to obtain the following technical result: - To simplify the design of the water heater of the network heater. flat, which is made of a metal sheet. - Reduce the load on the flange connection and, accordingly, reduce the number of pins and improve its o density. - Reduce the stress in the tube plate and thin it to 60 mm. - Discard the additional cylindrical shell attached to the elliptical bottom in the rotary chamber and, accordingly, reduce the length of the heater by 400-800 mm.

Description

The utility model relates to a power system, to horizontal type network heaters, which are used in heating plants for heating network water.

Existing designs of a horizontal type network heater have an inlet and a rotary water chambers that are closed by elliptical bottoms (Heat exchangers of power plants. Aronson K.E., Blinkov S.N., Brezgin V.I. et al. Edited by Brodov Yu.M. Yekaterinburg : Sokrat Publishing House, 2002, 968 pp. Fig. 4.11). Bottoms of large diameter (2500 ... 3200 mm) are connected to the chambers using flange connections, the density of which at high loads is a difficult technical task. To reduce the load on the bottom, tube plate, flange connection (respectively, to reduce their thickness), anchor ties are used.

The water chamber with anchor ties (Fig. 7.9 in the cited book) is taken as a prototype. In the known construction, longitudinal partitions were welded on one side to the bottom or tube plate, and on the other hand had a movable seal, i.e. they did not transmit longitudinal efforts. The drawback of the design with anchors is the manufacture of special anchor ties that require additional tube-free sections and the installation of which is time-consuming.

The purpose of the claimed utility model is to simplify the design of the water chamber of the network heater.

This goal is achieved by the design of the water chamber of a horizontal type network heater, characterized by the presence of a tube plate, a bottom, with inspection hatches and longitudinal partitions between the passage chambers, fixed by a welded connection to the tube plate and studs with a bottom, and betraying longitudinal forces. Inspection hatches may be missing.

The longitudinal partitions are of sufficient thickness (20 mm) and, for example, are arranged in four way heaters so that they can replace anchor ties. For ease of removal of the bottom, one of the connections should be detachable, as a rule, this is a hairpin connection with the bottom, but it is necessary to ensure its density.

The essence of the claimed utility model is illustrated by the example of the design of the input chamber of the four-way network heater with a flat bottom, depicted in the following figures:

FIG. 1 - the design of the input chamber of the four-way network heater with a flat bottom;

FIG. 2 - View A from the inspection hatches;

FIG. 3 - Section BB of the water chamber.

The input chamber of the horizontal type network heater shown in FIG. 1 is formed by a cylindrical shell 1 welded to the tube plate 2 (seam α is shown in Figs. 1 and 3) and a flat bottom 3 attached to the cylindrical shell 1 by a flange connection with studs 4. Four inspection hatches are made in the bottom 3. Entrance chamber usually offset from the center of the housing to improve steam supply. The location of the longitudinal partitions 6 (Fig. 2, dashed lines) and the studs 7, provides an even distribution of the load from the pressure on the bottom 3 and the tube plate 2.

From FIG. 2 it follows that the average size of each not toughened part of the bottom 3 decreases by about 2-3 times compared with the free bottom, which leads to a decrease in maximum stresses by 4-9 times. This allows you to use a simpler flat instead of an elliptical bottom. To tighten the bottom 3 and reduce its thickness, additional stiffeners can be used.

The claimed solution is implemented as follows.

The longitudinal partitions 6 are welded to the tube plate 2 (Fig. 3, seam β) and are attached to the bottom 3 using studs 7, which are screwed from the outside of the bottom and screwed into inserts 8, welded into the longitudinal partitions 6 (Fig. 3, view B , seam ϕ). Gaskets or washers are recommended for stud sealing.

In the rotary chamber there is a smaller number of longitudinal partitions, in places where there are no separate anchor ties can be installed to more evenly distribute the load on the bottom.

It is advisable to use longitudinal partitions that transmit longitudinal forces, and with elliptical bottoms, as this leads to a decrease in the thickness of the tube plate and unloading the flange of the bottom.

Calculations show that the use of an inlet chamber with longitudinal partitions transmitting longitudinal forces significantly reduces the load on the tube plate and it can be thinned from 110-140 mm to 60 mm, i.e. to the minimum thickness determined by the conditions of the density of the rolling connection of the tubes.

When using an elliptical bottom with a large radial stiffness at the edges, it is necessary to install an additional less rigid cylindrical shell around the bottom and the tube plate in the rotary chamber. When using a cover with a flat bottom and a cylindrical shell, there is no need for an additional chamber.

Thus, the use of the claimed water chamber of a horizontal type network heater allows to obtain the following technical result:

- Simplify the design of the water chamber of the network heater.

- Replace the elliptical bottom, which has a standard range of diameters and is made by stamping on a high power press, with a flat one, which is made of a metal sheet.

- Reduce the load on the flange connection and accordingly reduce the number of pins and improve its density.

- Reduce the stress in the tube plate and thin it to 60 mm.

- Refuse from the additional cylindrical shell attached to the elliptical bottom in the rotary chamber and, accordingly, reduce the length of the heater by 400-800 mm.

Claims (1)

The water chamber of a horizontal type network heater, consisting of a tube plate, a bottom and longitudinal partitions between the passage chambers welded to the tube plate, is characterized by the connection of the partitions to the bottom with studs screwed on the outside of the chamber.

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