阅读说明：本技术 一种锅炉管排固定方法及其装置 (Boiler tube bank fixing method and device ) 是由 张丹平 包英捷 余长开 吴迅 罗彬� 曾多 陈飞云 李超 兰小洪 程峰 于 2020-05-27 设计创作，主要内容包括：本发明公开了一种锅炉管排固定方法,包括对管屏指定位置最外圈管子在特定的位置进行短接、最外圈管子的切割处接冷夹管三通、将受热面管以先分后合的方式将管屏夹住及在冷夹管支管的水平段上焊接梳形板这四个步骤,本发明还公开了一种锅炉管排固定装置,包括冷夹管三通,冷夹管三通包括三叉管及两个冷夹管支管,冷夹管支管的一端固定连接形成连接部,且两个冷夹管支管间形成供管排通过的容纳部,三叉管的一端与连接部固定连通,且与容纳部位于同一水平线上。本发明由于管排穿过冷夹管支管间的容纳部及三叉管,实现冷夹管三通固定管排,并通过在冷夹管支管上设置梳形板,从而防止管排上的管子出列,提高火电厂锅炉受热面的安全性及可靠性。(The invention discloses a boiler tube bank fixing method which comprises the four steps of carrying out short connection on the outermost ring tube at a specific position at the specified position of a tube panel, connecting a cold clamping tube tee joint to the cutting position of the outermost ring tube, clamping the tube panel by a heated surface tube in a manner of separating and then combining, and welding a comb-shaped plate on the horizontal section of a cold clamping tube branch tube. The tube bank penetrates through the accommodating part and the Y-shaped tube between the cold clamping tube branch tubes, so that the cold clamping tube tee joint is fixed, and the comb-shaped plates are arranged on the cold clamping tube branch tubes, so that tubes on the tube bank are prevented from being discharged, and the safety and the reliability of the heating surface of the boiler of the thermal power plant are improved.)

1. A method for fixing a boiler tube bank is characterized by comprising the following steps:

s1: cutting short circuits are conducted on the outermost ring of pipes at the specified positions of the pipe screens at specific positions;

s2: the cutting position of the outermost ring of pipe is connected with a cold pipe clamping tee (1);

s3: the tube panel is clamped by the heated surface tube in a way of first separation and then combination.

2. The method of claim 1, wherein: further comprising S4: and a comb-shaped plate (4) matched with the pitch and the pipe diameter of the fixed pipe row (2) is welded on the horizontal section of the cold clamping pipe branch pipe (12).

3. A fixing method of a tube bank of a boiler as claimed in claim 1 or 2, characterized in that: the tube panel finger positions are at the high inlet section, the high outlet section and the high rediscreen bottom.

4. A fixing method of a tube bank of a boiler as claimed in claim 1 or 2, characterized in that: the fixed position of the cold clamping pipe tee joint (1) is determined according to flow distribution.

5. The method of claim 4, wherein: the flow distribution is related to resistance and heating.

6. The method of claim 5, wherein: and (3) the resistance of the outermost ring of pipes before and after short circuit is required to be kept consistent, and the heating condition is determined iteratively by combining the results of thermodynamic calculation and wall temperature calculation.

7. The utility model provides a boiler bank of tubes fixing device which characterized in that: including cold double-layered pipe tee bend (1), cold double-layered pipe tee bend (1) includes Y-pipe (11) and two cold double-layered pipe branch pipes (12), the one end fixed connection of cold double-layered pipe branch pipe (12) forms connecting portion (13), and forms between two cold double-layered pipe branch pipes (12) and supply portion (3) that hold that bank of tubes (2) pass through, the one end of Y-pipe (11) and connecting portion (13) fixed connection of two cold double-layered pipe branch pipe (12) junctions, and link up each other between the three, Y-pipe (11) are located same water flat line with portion (3) that hold, bank of tubes (2) pass Y-pipe (11).

8. The boiler bank of tubes fixing device of claim 7, wherein: the cold-clamping pipe branch pipes (12) are arranged in parallel.

9. A boiler tube bank fixing device as claimed in claim 7 or 8, wherein: and a comb-shaped plate (4) matched with the pitch and the pipe diameter of the pipe row (2) is welded on the horizontal section of the cold clamping pipe branch pipe (12).

10. A boiler tube bank fixture according to claim 9, wherein: and a sliding block (5) is arranged between the tube rows (2).

Technical Field

The invention relates to the field of boilers in thermal power plants, in particular to a method and a device for fixing a boiler tube bank.

Background

In a thermal power plant, welded round steel and sliders are adopted between pipes in a high-temperature superheater and a high-temperature reheater tube panel on a boiler to position the pipes, the uneven heat and cold of the pipes and the different expansion caused by the uneven heat load of the boiler in a hot state are different, a large number of pipe clamps are pulled off, the pipes are listed, the heat absorption capacity of the listed pipes is increased, the abrasion is strengthened, the overtemperature and abrasion pipe explosion are caused, and the pipes are easy to coke at the listed pipes.

In order to solve the problems, a heat-resistant steel clamping plate is used for fixing a tube panel so as to fix a boiler tube row and prevent tubes from being discharged, but the heat-resistant steel clamping plate has the problems of insufficient strength and easy burning loss in use due to the fact that the heat-resistant steel clamping plate is in a high-temperature working environment of 1000 ℃ and does not contain a cooling medium, so that the fixing effect is poor, the service life is short, and the cost is high.

Disclosure of Invention

In view of the above-mentioned shortcomings, an object of the present invention is to provide a method and an apparatus for fixing a tube bank of a boiler, wherein each tube bank is fixed by a cold clamping tube tee, so that the reliability of tube sliders of tube banks of a high-temperature heating surface is improved, and the tubes are not easy to be discharged, thereby improving the safety and reliability of the heating surface of the boiler of a thermal power plant.

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

a boiler tube bank fixing method comprises the following steps:

s1: cutting short circuits are conducted on the outermost ring of pipes at the specified positions of the pipe screens at specific positions;

s2: the cutting position of the outermost pipe is connected with a cold pipe clamping tee;

s3: clamping the tube panel of the heated surface tube in a way of first separation and then combination;

s4: and a comb-shaped plate matched with the pitch and the pipe diameter of the fixed pipe row is welded on the horizontal section of the cold clamping pipe branch pipe.

Preferably, the tube panel finger positions are at the high inlet section, the high outlet section and the high re-panel bottom.

Preferably, the fixed position of the cold trap tee is determined according to flow distribution.

Preferably, the flow distribution is related to resistance and heating.

Preferably, the resistance of the outermost ring of pipes before and after short circuit is kept consistent, and the heating condition is determined iteratively by combining the results of thermodynamic calculation and wall temperature calculation.

The utility model provides a boiler tube bank fixing device, includes cold clamp pipe tee bend, cold clamp pipe tee bend includes Y-pipe and two cold clamp pipe branch pipes, the one end fixed connection of cold clamp pipe branch pipe forms connecting portion, and forms the portion of holding that supplies the bank of tubes to pass through between two cold clamp pipe branch pipes, the one end of Y-pipe and the connecting portion fixed connection of two cold clamp pipe branch pipe junctions, and link up each other between the three, Y-pipe and holding position are on same water flat line, the bank of tubes passes the Y-pipe.

Preferably, the cold-clamping pipe branch pipes are arranged in parallel.

Preferably, the horizontal section of the cold pipe clamping branch pipe is welded with a comb-shaped plate matched with the pipe row pitch and the pipe diameter.

Preferably, a slide block is arranged between the tube rows.

The invention has the beneficial effects that: the tube bank penetrates through the accommodating part between the two cold-clamping tube branch pipes and penetrates through the Y-shaped pipe, so that the tube bank is fixed on the cold-clamping tube tee joint, and the comb-shaped plates are arranged on the cold-clamping tube branch pipes, so that tubes on the tube bank are prevented from being discharged, and the safety and the reliability of the heating surface of the boiler of the thermal power plant are improved.

The invention is further described with reference to the following figures and examples.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a block diagram of a cold trap tee of the present invention;

FIG. 2 is a block diagram of the present invention tube array on a cold trap tee;

FIG. 3 is a cross-sectional view taken along plane A of FIG. 2;

FIG. 4 is a top view of FIG. 2;

FIG. 5 is a block diagram of a branch of the cold trap pipe of FIG. 1;

fig. 6 is a top view of fig. 5.

The reference numerals in the drawings are explained below.

Cold clamping pipe tee joint-1, Y-pipe-11, cold clamping pipe branch pipe-12, connecting part-13, pipe row-2, containing part-3, comb-shaped plate-4 and slide block-5.

Detailed Description

In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.