CN214038383U

CN214038383U - Boiler shell type gas boiler smoke return chamber structure

Info

Publication number: CN214038383U
Application number: CN202023102680.8U
Authority: CN
Inventors: 李帅; 孔凡良; 闫裕森; 蒋春光
Original assignee: Harbin Hongguang Boiler General Factory Co ltd
Current assignee: Harbin Hongguang Boiler General Factory Co ltd
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2021-08-24
Anticipated expiration: 2030-12-21

Abstract

A shell type gas boiler smoke return chamber structure relates to a smoke return chamber structure. The utility model discloses a there is the bracing fracture in the tube sheet before solving current boiler smoke return room, and the problem of thermal fatigue crackle phenomenon is produced to the threaded smoke tube of second return flue gas entry end. The utility model discloses a preceding tube sheet (2) are vertical to be installed at the front end of smoke-returning room (1), and heat preservation (3) are installed in the front on tube sheet (2), and sleeve pipe (4) are embedded in heat preservation (3), and the play cigarette side of every tobacco pipe (6) is inserted and is adorned in a sleeve pipe (4), and the play cigarette side and sleeve pipe (4) fixed connection of tobacco pipe (6), the one end welding of grabbing nail (5) is in the front on tube sheet (2), and the other end buries in heat preservation plastic refractory material (3). The installation position of the gripping nails (5) is arranged around the sleeve (4). The utility model is used in the shell type gas boiler.

Description

Boiler shell type gas boiler smoke return chamber structure

Technical Field

The utility model relates to a return smoke chamber structure, concretely relates to pot type gas boiler returns smoke chamber structure.

Background

With the wide use of clean energy in China, the demand of gas boilers is increasing. The WNS type is used as a classic gas boiler product and has been developed into a more mature and reliable boiler type through long-term use, update and generation change. However, after the boiler is operated for a period of time, the front tube plate of the smoke returning chamber of the boiler is pulled and supported to be broken, and the threaded smoke tube at the smoke inlet end of the second return stroke generates thermal fatigue cracks.

In conclusion, the front tube plate of the existing boiler smoke returning chamber has the problems of tension fracture and thermal fatigue crack phenomenon generated by the threaded smoke tube at the smoke inlet end of the second return stroke.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that the tube plate has the bracing fracture before the current boiler returns the smoke chamber, and the thread smoke tube of second return stroke flue gas entry end produces thermal fatigue crackle phenomenon. Further provides a boiler shell type gas boiler smoke returning chamber structure.

The technical scheme of the utility model is that: the utility model provides a pot type gas boiler returns cigarette room structure, it includes smoke return room and preceding tube sheet, the vertical front end of installing at smoke return room of preceding tube sheet, it still includes the heat preservation, a plurality of sleeve pipes and a plurality of grab nail, the heat preservation is installed in the front on the tube sheet, the sleeve pipe is embedded in the heat preservation, the play cigarette side plug-in mounting of every tobacco pipe is in a sleeve pipe, and the play cigarette side and the sleeve pipe fixed connection of tobacco pipe, the one end welding of grab nail is in the front on the tube sheet, the other end buries in the heat preservation or stretches out the heat preservation, the mounted position of grab nail is for arranging around the sheathed tube.

Furthermore, the smoke outlet side of the smoke tube is fixedly connected with the sleeve in a welding mode.

Further, the height of the welding leg between the smoke outlet side of the smoke tube and the sleeve is 4 mm.

Further, the staples are "L" shaped.

Further, the pitch between two adjacent gripping nails is 80mm-100 mm.

Further, the plurality of sleeves and the plurality of the staples are all made of 310S stainless steel.

Furthermore, the heat-insulating layer is made of refractory plastic material by ramming.

Compared with the prior art, the utility model has the following effect:

the utility model discloses use on pot shell type gas boiler, it is strong to make simple practicality, can be applied to the steam-heated water boiler of each tonnage of "WNS type". The utility model discloses an having add the effectual high temperature flue gas that has completely cut off the burning production in the boiler furnace of heat preservation in returning the smoke chamber, having guaranteed that the temperature of returning the preceding tube sheet of smoke chamber and male tobacco pipe can not be too high, the effectual phenomenon of high temperature out the thermal fatigue crack of tobacco pipe output when having solved the boiler long-time operation has ensured the safe operation of boiler. Thereby effectively solving the problem of cracking of the smoke tube when the smoke tube works in a high-temperature smoke environment for a long time. The novel smoke returning chamber of the boiler shell type gas boiler has good effect after being used, so the functional structure scheme of the novel smoke returning chamber of the boiler shell type gas boiler has certain popularization and application values on boilers with the same or similar structures.

Drawings

Fig. 1 is a schematic view of the present invention installed on a "WNS type" shell type gas boiler. Fig. 2 is a schematic structural diagram of the present invention. Figure 3 is an enlarged view of the staple. Fig. 4 is a partial enlarged view of fig. 1 at a.

Detailed Description

The first embodiment is as follows: the embodiment is described with reference to fig. 1 to 4, and the boiler-shell type gas boiler smoke return chamber structure of the embodiment includes a smoke return chamber 1 and a front tube plate 2, the front tube plate 2 is vertically installed at the front end of the smoke return chamber 1, the boiler-shell type gas boiler smoke return chamber structure further includes a heat insulation layer 3, a plurality of sleeves 4 and a plurality of gripping nails 5, the heat insulation layer 3 is installed on the front tube plate 2, the sleeves 4 are embedded in the heat insulation layer 3, the smoke outlet side of each smoke tube 6 is inserted in one sleeve 4, the smoke outlet side of each smoke tube 6 is fixedly connected with the sleeve 4, one end of each gripping nail 5 is welded on the front tube plate 2, the other end is embedded in the heat insulation layer 3 or extends out of the heat insulation layer 3, and the mounting positions of the gripping nails 5 are arranged around the sleeves 4.

The second embodiment is as follows: the present embodiment is described with reference to fig. 1 to 2 and 4, and the smoke outlet side of the smoke tube 6 of the present embodiment is fixedly connected with the sleeve 4 by welding. So set up, it is more firm to connect, is convenient for guarantee firm connection between tobacco pipe and the sleeve pipe. Other components and connections are the same as in the first embodiment.

The third concrete implementation mode: the present embodiment is described with reference to fig. 1 to 2 and 4, and the height of the leg between the smoke outlet side of the smoke tube 6 and the sleeve 4 is 4 mm. So set up, be convenient for guarantee that the welding department is more firm, prevent to take place to open because of tobacco pipe and sleeve pipe are heated the back and weld the phenomenon such as. Other components and connection relationships are the same as those in the second embodiment.

The fourth concrete implementation mode: the present embodiment will be described with reference to fig. 3, and the staple 5 of the present embodiment is L-shaped. So set up, be convenient for connect the heat preservation. Other compositions and connection relations are the same as those of the third embodiment.

The fifth concrete implementation mode: the present embodiment is described with reference to fig. 1 to 2 and 4, and the pitch between two adjacent staples 5 of the present embodiment is 80mm to 100 mm. So set up, be convenient for guarantee the fastness of heat preservation installation. Other compositions and connection relationships are the same as those in the first, second, third or fourth embodiment.

The sixth specific implementation mode: referring to fig. 1 to 4, the present embodiment will be described, and the plurality of sleeves 4 and the plurality of staples 5 of the present embodiment are all made of 310S stainless steel. By the arrangement, the high-temperature high-. Other compositions and connection relationships are the same as in the first, second, third, fourth or fifth embodiment.

The seventh embodiment: the present embodiment will be described with reference to fig. 1 to 2 and 4, and the insulating layer 3 of the present embodiment is formed by ramming a plastic refractory. So set up, can effectually completely cut off the high temperature flue gas that the burning produced in the boiler furnace. Other compositions and connection relationships are the same as in the first, second, third, fourth, fifth or sixth embodiment.

The working principle of the present invention is explained with reference to fig. 1 to 4:

the utility model discloses a with two return tube banks of boiler back combustion chamber front tube plate regions, install 310S stainless steel sleeve and grab nail additional and smash plastic refractory at the pipe end. The structure comprises three parts, namely a stainless steel gripping nail phi 5L (65), a heat insulation layer made of refractory plastic material and a stainless steel sleeve phi 60X3L (120). The sleeve is inserted into the smoke tube by 60mm, and the tail end of the smoke tube in the high-temperature area is reinforced. The sleeve and the smoke tube are welded, and the height of the welding leg is 4 mm. The grabbing nails are welded on the back combustion chamber and the back tube plate and arranged along the area in the drawing, the grabbing nail pitch is 80-100mm, the grabbing nails are welded with the front tube plate of the back combustion chamber, and the height of a welding leg is 2 mm. And 2mm of asphalt is coated on the surfaces of the grabbing nails and the pipes, and then pouring of the refractory plastic is carried out. Wherein the sleeve pipe and the grab nail all have adopted 310S stainless steel, have outstanding high temperature oxygen resistance, and the highest service temperature reaches 1200 ℃ to the plastic refractory of ramming on the preceding tube sheet of smoke return chamber can effectually completely cut off the high temperature flue gas that the burning produced in the boiler furnace courage, has guaranteed that the temperature of the preceding tube sheet of smoke return chamber and inserted tobacco pipe can not be too high, the effectual phenomenon of solving the boiler and going out the thermal fatigue crack of tobacco pipe output high temperature when long-time operation, has ensured the safe operation of boiler.

Claims

1. The utility model provides a pot type gas boiler returns cigarette room structure, it includes returns cigarette room (1) and preceding tube sheet (2), and the vertical front end of installing in smoke return room (1) of preceding tube sheet (2), its characterized in that: it still includes heat preservation (3), a plurality of sleeve pipes (4) and a plurality of grab nail (5), heat preservation (3) are installed in the front on tube sheet (2), sleeve pipe (4) are embedded in heat preservation (3), the play cigarette side plug-in mounting of every tobacco pipe (6) is in a sleeve pipe (4), and the play cigarette side and sleeve pipe (4) fixed connection of tobacco pipe (6), the one end welding of grab nail (5) is in front on tube sheet (2), the other end buries in heat preservation (3), the mounted position of grab nail (5) is for arranging around sleeve pipe (4).

2. The structure of the smoke returning chamber of the shell type gas boiler as claimed in claim 1, wherein: the smoke outlet side of the smoke pipe (6) is fixedly connected with the sleeve (4) in a welding mode.

3. The structure of the smoke returning chamber of the shell type gas boiler as claimed in claim 2, wherein: the height of the welding leg between the smoke outlet side of the smoke tube (6) and the sleeve (4) is 4 mm.

4. A shell type gas boiler smoke returning chamber structure according to claim 3, characterized in that: the grabbing nails (5) are L-shaped.

5. The structure of the smoke returning chamber of the shell type gas boiler as claimed in claim 4, wherein: the pitch between two adjacent gripping nails (5) is 80mm-100 mm.

6. The structure of the smoke returning chamber of the shell type gas boiler as claimed in claim 5, wherein: the plurality of sleeves (4) and the plurality of the gripping nails (5) are all made of 310S stainless steel.

7. The structure of the smoke returning chamber of the shell type gas boiler as claimed in claim 6, wherein: the heat-insulating layer (3) is made of refractory plastic material by ramming.