CN214891267U

CN214891267U - Outer fin of pipe row group of slag cooler with transition bent plate

Info

Publication number: CN214891267U
Application number: CN202120781532.9U
Authority: CN
Inventors: 王振山; 蔡会生
Original assignee: Qingdao Giant Honor Electricity Power Equipment Co ltd
Current assignee: Qingdao Giant Honor Electricity Power Equipment Co ltd
Priority date: 2021-04-16
Filing date: 2021-04-16
Publication date: 2021-11-26
Anticipated expiration: 2031-04-16

Abstract

The utility model discloses a take outer fin of cold sediment machine bank of tubes group of transition bent plate, including the heat transfer barrel, the heat transfer barrel divide into outer tube bank and inner tube bank, outer tube bank and inner tube bank all are provided with outer fin heat abstractor, outer fin heat abstractor includes cold sediment machine heat exchange tube, cold sediment machine heat exchange tube outer wall rigidity is connected with the stress relief transition bent plate, avoids stress concentration to lead to cold sediment machine heat exchange tube to damage through the stress relief transition bent plate and leaks, the stress relief transition bent plate is kept away from cold sediment machine heat exchange tube one side central point and is put the outer fin of fixedly connected with, the stress dispersion board that two symmetries of fixedly connected with set up between cold sediment machine heat exchange tube outer wall and the stress relief transition bent plate inner wall, makes the stress of cold sediment machine heat exchange tube by the homodisperse through the stress dispersion board. The utility model discloses can be so that cold sediment machine heat exchange tube avoids leading to damaging because of stress concentration, greatly reduced cost of maintenance guarantees the biggest life of equipment.

Description

Outer fin of pipe row group of slag cooler with transition bent plate

Technical Field

The utility model relates to a slag cooler heat dissipation technical field especially relates to a take outer fin of cold sediment machine bank of tubes group of transition bent plate.

Background

The slag cooler is used as an auxiliary machine of the boiler, and has the function of cooling the slag burned in the boiler, so that the slag cooler can be reused and is beneficial to environmental protection.

At present, a roller slag cooler is generally adopted for a slag cooler, cooling water and boiler bottom slag indirectly exchange heat in a rolling barrel to cool the bottom slag, and cooled ash slag is conveyed to an outlet of the slag cooler through a spiral sheet in the barrel. The double-tube row modular slag cooler is one of roller slag coolers, the heat exchange cylinder is divided into an inner layer and an outer layer, and the two layers of cylinders are formed by combining modular tube rows. The heat transfer is participated in simultaneously in the inboard of outer bank of tubes, the outside of interior bank of tubes, the inboard of interior bank of tubes, and heat transfer area is big, and heat transfer capacity is strong, and the bank of tubes of modular can be pulled down alone, is convenient for change and maintain, and whole light in weight long service life. The defects of insufficient output force and short service life of a transmission system of the traditional water-cooling jacket roller slag cooler are overcome. Is mainly used for a deslagging system of a large CFB unit with the power of more than 300 MW. The two layers of cylinders of the slag cooler are composed of heat exchange tube banks, and outer fins are designed outside the inner tube bank, so that the wall adhesion rate of the slag cooler is improved, and the heat exchange area is increased. The cooling capacity of the slag cooler is improved.

Usually, the outer fins are all made by welding a section of flat steel on the heat exchange tube group, and in practical application, cracks are often generated at the gap between the heat exchange tube group and the outer fins at the high-temperature section. The reason for generating cracks is analyzed to be that large stress concentration exists near the fin gaps, and fatigue cracks are generated under the long-term action of high temperature and mechanical reciprocating force. The cracks result in water leakage from the bank of tubes. Once the pipe row group leaks water, a large amount of overhaul and maintenance workload can be generated. Therefore, a new outer fin capable of preventing the tube bank from leaking water is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the stress concentration of the outer rabbet gap of the heat exchange tube easily causes fatigue cracks.

In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides a take outer fin of cold sediment machine tube bank of transition bent plate, including the heat transfer barrel, the heat transfer barrel divide into outer tube bank and inner tube bank, outer tube bank and inner tube bank all are provided with outer fin heat abstractor, outer fin heat abstractor includes cold sediment machine heat exchange tube, cold sediment machine heat exchange tube outer wall rigidity is connected with the stress relief transition bent plate, avoids stress concentration to lead to cold sediment machine heat exchange tube to damage through the stress relief transition bent plate and leaks, the stress relief transition bent plate is kept away from cold sediment machine heat exchange tube one side central point and is put the outer fin of fixedly connected with, the stress dispersion board that two symmetries of fixedly connected with set up between cold sediment machine heat exchange tube outer wall and the stress relief transition bent plate inner wall, makes the stress of cold sediment machine heat exchange tube by the homodisperse through the stress dispersion board.

Preferably, the stress relief transition bent plate and the heat exchange tube of the slag cooler are welded through electric welding, two ends of the stress dispersion plate are welded with the outer wall of the heat exchange tube of the slag cooler and the stress relief transition bent plate, the outer fins and the stress relief transition bent plate are welded through electric welding, so that the fixed connection is sufficient, and the stress relief transition bent plate is not broken back under the stress action.

Preferably, the stress-relief transition bent plate and the outer fins are made of cast iron materials, the cast iron materials have good moulding and good heat conductivity, the stress dispersion plate is made of aluminum alloy materials, and the aluminum alloy materials are soft and good in heat conductivity.

Preferably, the outer fins are made of a plurality of equal-length flat cast iron materials, the stress relief transition bent plate is of a groove-shaped integral structure formed by bending the flat cast iron materials, and the groove-shaped integral structure has good shaping and certain elasticity when stress is concentrated, so that the outer fins are more durable.

The utility model has the advantages as follows:

the utility model discloses well stress transition bent plate has certain "moulding" because of itself for bending structure, the stress concentration that the closed angle of flat cast iron butt joint department leads to can be absorbed by "moulding" of itself, under the long-term effect of high temperature and mechanical reciprocating force, can not produce fatigue crack yet, even produce the crackle, the crackle only takes place on the bent plate that passes through, can not cause bank of tubes to organize the phenomenon of leaking, the cold sediment machine that has significantly reduced overhauls the maintenance work load, reduce the maintenance cost, increase equipment life.

Drawings

FIG. 1 is a partial front view of an outer fin of a tube bank of a slag cooler with a transition bent plate according to the present invention;

FIG. 2 is a side sectional view of the outer fins of the tube bank of the slag cooler with the transition bent plate of the present invention;

fig. 3 is a cross-sectional view of the heat exchange cylinder of the outer fins of the tube bank of the slag cooler with the transition bent plate of the utility model.

In the figure: 1. a heat exchange pipe of the slag cooler; 2. eliminating stress excessive bending plate; 3. an outer fin; 4. a stress dispersion plate; 5. an outer tube bank; 6. and (4) arranging the inner pipes.

Detailed Description

The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.

Referring to fig. 1 and 3, the outer fin of the tube bank of the slag cooler with the transition bent plate comprises a heat exchange cylinder body, wherein the heat exchange cylinder body is divided into an outer tube bank 5 and an inner tube bank 6, the outer tube bank 5 and the inner tube bank 6 are both provided with outer fin heat dissipation devices, each outer fin heat dissipation device comprises a heat exchange tube 1 of the slag cooler, the outer wall of the heat exchange tube 1 of the slag cooler is fixedly connected with a stress relief excessive bent plate 2, the center of one side, away from the heat exchange tube 1 of the slag cooler, of the stress relief excessive bent plate 2 is fixedly connected with an outer fin 3, and two stress dispersion plates 4 which are symmetrically arranged are fixedly connected between the outer wall of the heat exchange tube 1 of the slag cooler and the inner wall of the stress relief excessive bent plate 2.

As shown in fig. 2, the stress relief transition bent plate 2 and the outer fins 3 are made of cast iron materials, the stress dispersion plate 4 is made of aluminum alloy materials, the outer fins 3 are made of a plurality of equal-length flat cast iron materials, the stress relief transition bent plate 2 is of a 'groove-shaped' integral structure formed by bending the flat cast iron materials, the stress relief transition bent plate 2 and the heat exchange tube 1 of the slag cooler are welded through electric welding, two ends of the stress dispersion plate 4 are welded with the outer wall of the heat exchange tube 1 of the slag cooler and the stress relief transition bent plate 2, and the outer fins 3 and the stress relief transition bent plate 2 are welded through welding.

The utility model discloses when using, can be absorbed by "moulding" of itself when equipment operation produces stress, under the long-term effect of high temperature and mechanical reciprocating force, can not produce fatigue crack yet, even produce the crackle, the crackle only takes place on the transition bent plate, can not cause bank of tubes phenomenon of leaking, and can evenly conduct the stress to the excessive bent plate of stress relief through the stress dispersion board, and the excessive bent plate of effectual stress relief is protected.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. The utility model provides a take outer fin of cold sediment machine bank of tubes group of transition bent plate, includes the heat transfer barrel, its characterized in that: the heat exchange barrel body is divided into an outer tube row group (5) and an inner tube row group (6), the outer tube row group (5) and the inner tube row group (6) are provided with outer fin heat dissipation devices, each outer fin heat dissipation device comprises a slag cooler heat exchange tube (1), the outer wall of the slag cooler heat exchange tube (1) is fixedly connected with stress relief transition bent plates (2), the stress relief transition bent plates (2) are far away from outer fins (3) fixedly connected with the center of one side of the slag cooler heat exchange tube (1), and two stress dispersion plates (4) symmetrically arranged are fixedly connected between the outer wall of the slag cooler heat exchange tube (1) and the inner wall of the stress relief transition bent plates (2).

2. The outer fin of the tube bank group of the slag cooler with the transition bent plate as claimed in claim 1, wherein: the stress-relief over-bent plate is welded with the heat exchange tube (1) of the slag cooler through electric welding, two ends of the stress dispersion plate (4) are welded with the outer wall of the heat exchange tube (1) of the slag cooler and the stress-relief over-bent plate (2), and the outer fins (3) are welded with the stress-relief over-bent plate (2).

3. The outer fin of the tube bank group of the slag cooler with the transition bent plate as claimed in claim 1, wherein: the stress-relief transition bent plate (2) and the outer fins (3) are made of cast iron materials, and the stress dispersion plate (4) is made of aluminum alloy materials.

4. The outer fin of the tube bank group of the slag cooler with the transition bent plate as claimed in claim 1, wherein: the outer fins (3) are made of a plurality of equal-length flat cast iron materials, and the stress relief transition bent plate (2) is of a groove-shaped integral structure formed by bending the flat cast iron materials.