Boiler furnace arch water wall pipeline

Abstract

The utility model relates to a furnace arch water wall pipeline of a boiler. The furnace arch water wall pipeline comprises a bent pipe and a sealing box. A bending part is arranged at the central position of the bending pipe, the bending part is arranged in a sealing box, a filling material for absorbing and relieving the stress of the bending pipe is arranged in the sealing box, and the sealing box is fixed with the bending pipe through the filling material. According to the boiler furnace arch water-cooled wall pipeline, after the boiler furnace arch water-cooled wall pipeline is arranged, the stress concentration of a furnace arch structure is greatly weakened, and the continuous and accumulated service life of a boiler is greatly prolonged; the sealing effect is good and the use is reliable. The structure has the advantages of simplicity and convenience in installation, low cost, good structure stress concentration prevention effect and the like.

Description

Technical Field

[0001] The utility model relates to the field of thermal power generation equipment, in particular to a boiler flame-folding angle water-cooled wall pipeline. Background Art

[0002] In the face of the adjustment of the national power structure, thermal power generating units will not be operated without deep peak regulation. Due to the frequent start and stop of the units and the frequent changes in load, the wall temperature of the metal parts and the temperature, pressure and flow rate of the related working medium change frequently, causing the metal parts to bear more negative effects than the normal operation. For example, various fatigue (especially thermal fatigue), stress corrosion, impact, wear, etc., which the metal parts are subjected to, each action will increase the damage to the related parts. It accelerates the "low-cycle fatigue" failure caused by the structural stress of the boiler's flame angle, causing the boiler to burst and stop. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a boiler flame-folding angle water-cooled wall pipe.

[0004] The technical solution adopted by the utility model to solve the technical problem is: a boiler flame bending angle water-cooled wall pipeline in the application comprises a bending pipe and a sealing box;

[0005] A bending portion is provided at the central position of the bending tube, and the bending portion is arranged in the sealing box. A filling material for absorbing and relieving the stress of the bending tube is provided in the sealing box, and the sealing box is fixed to the bending tube through the filling material.

[0006] In one embodiment of the present application, the bending portion is in a gate shape, and the pipe opening of the bending pipe is provided with a prefabricated groove.

[0007] In one embodiment of the present application, the sealing box is formed by folding a 3 mm steel plate.

[0008] In one embodiment of the present application, the material of the bent tube is consistent with the material of the boiler flame bending angle water-cooled wall.

[0009] In one embodiment of the present application, the bending tube is a steel tube with a diameter of 63 mm and a wall thickness of 8 mm, or a steel tube with a diameter of 60 mm and a wall thickness of 7.5 mm.

[0010] In one embodiment of the present application, the filling material is formed by cooling a high-temperature castable.

[0011] Beneficial effects of the utility model: A boiler flame-bending angle water-cooled wall pipe in the present application includes a bent pipe and a sealing box; a bent portion is provided at the central position of the bent pipe, the bent portion is arranged in the sealing box, a filler for absorbing and relieving the stress of the bent pipe is provided in the sealing box, and the sealing box is fixed to the bent pipe through the filler. After the boiler flame-bending angle water-cooled wall pipe is provided, the present application greatly reduces the concentration of structural stress of the flame-bending angle, greatly improves the continuous and cumulative service life of the boiler; the sealing effect is good and the use is reliable. It has the advantages of simple and convenient installation, low cost, and good effect in preventing structural stress concentration. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic structural diagram of a bent tube of a boiler water-cooled wall pipe at a flame bending angle according to the present application;

[0013] Figure 2 This is a schematic diagram of the overall structure of a boiler flame-bending angle water-cooled wall pipe of the present application;

[0014] The reference numerals are as follows:

[0015] 1-bending tube, 11-bending portion, 2-sealing box, 3-filling material. DETAILED DESCRIPTION

[0016] The following will describe the implementation methods of the present application with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for illustrating the present application, not for limiting the scope of protection of the present application.

[0017] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application, and thus the drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0018] Example

[0019] like Figure 1-Figure 2 As shown, a boiler flame bending angle water-cooled wall pipe in the present application includes a bending pipe 1 and a sealing box 2;

[0020] A bending portion 11 is provided at the central position of the bending tube 1 , and the bending portion 11 is arranged in the sealing box 2 . A filler 3 for absorbing and relieving the stress of the bending tube 1 is provided in the sealing box 2 . The sealing box 2 is fixed to the bending tube 1 via the filler 3 .

[0021] The bending portion 11 is in the shape of a gate, and a prefabricated groove is provided at the pipe opening of the bending pipe 1. The bending pipe 1 is in the shape of a π as a whole, and each right angle is rounded to reduce the pipe stress.

[0022] The sealing box 2 is formed by folding a 3 mm steel plate.

[0023] The material of the bending tube 1 is consistent with the material of the boiler flame bending angle water-cooled wall.

[0024] The bending tube 1 is a steel tube with a diameter of 63 mm and a wall thickness of 8 mm, or a steel tube with a diameter of 60 mm and a wall thickness of 7.5 mm.

[0025] The filler 3 is formed by cooling the high temperature castable. The filler of the high temperature castable is usually a powdery or granular material, including aluminum oxide, magnesium oxide, silica sand, quartz powder, expanded perlite, etc. The bending tube 1 can be fixed in the sealing box by filling the high temperature castable, and the stress of the bending tube 1 can be absorbed and relieved by the high temperature castable.

[0026] A boiler flame-bending angle water-cooled wall pipe in the present application is constructed by the following method:

[0027] 1. Select pipes with the same specifications, dimensions and materials as the corresponding folding angle water-cooled wall (such as Φ63*8 / Φ60*7.5, SA-210C).

[0028] 2. Use pipes of the same specifications, dimensions and materials to design and manufacture a set of pipes that absorb and relieve the structural stress of the flame bending angle:

[0029] 3. A special flame-folding angle water-cooled wall sealing device is designed and manufactured using 3mm steel plate (consistent with the material of the water-cooled wall tube), and installed in the flame-folding angle wind box corresponding to the back of a boiler flame-folding angle water-cooled wall pipeline. The windward side of the furnace is sealed with high-temperature castables.

[0030] A boiler flame-bending angle water-cooled wall pipe in the present application includes a bent pipe and a sealing box; a bent portion is provided at the central position of the bent pipe, the bent portion is arranged in the sealing box, a filler for absorbing and relieving the stress of the bent pipe is provided in the sealing box, and the sealing box is fixed to the bent pipe through the filler. After the boiler flame-bending angle water-cooled wall pipe is provided in the present application, the concentration of structural stress of the flame-bending angle is greatly reduced, and the continuous and cumulative service life of the boiler is greatly improved; the sealing effect is good and the use is reliable. It has the advantages of simple and convenient installation, low cost, and good effect in preventing structural stress concentration.

[0031] The above embodiments are merely illustrative of the principles and effects of the present application, and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. A boiler flame angle water-cooled wall pipe, characterized in that: It comprises a bending tube (1) and a sealing box (2); A bending portion (11) is provided at the central position of the bending tube (1), and the bending portion (11) is arranged in the sealing box (2). A filling material (3) for absorbing and relieving the stress of the bending tube (1) is provided in the sealing box (2), and the sealing box (2) is fixed to the bending tube (1) via the filling material (3).

2. A boiler flame angle water-cooled wall pipe according to claim 1, characterized in that: The bending portion (11) is in the shape of a gate, and the pipe opening of the bending pipe (1) is provided with a prefabricated groove.

3. The boiler flame angle water-cooled wall pipe according to claim 1, characterized in that: The sealing box (2) is formed by folding a 3 mm steel plate.

4. The boiler flame angle water-cooled wall pipe according to claim 1, characterized in that: The material of the bent tube (1) is consistent with the material of the boiler flame bending angle water-cooled wall.

5. The boiler flame angle water-cooled wall pipe according to claim 1, characterized in that: The bent tube (1) is a steel tube with a diameter of 63 mm and a wall thickness of 8 mm, or a steel tube with a diameter of 60 mm and a wall thickness of 7.5 mm.

6. The boiler flame angle water-cooled wall pipe according to claim 1, characterized in that: The filling material (3) is formed by cooling a high-temperature castable.

Images