Sealing device for boiler through-wall pipe

Abstract

The utility model relates to a boiler through-wall pipe sealing device, which belongs to the technical field of boilers and comprises a plurality of ceiling superheater pipelines, a plurality of high-temperature superheater pipelines and a stress absorption component, the ceiling superheater pipelines are connected through a sealing plate, and a first through hole penetrating through the top and the bottom of the sealing plate is formed in the sealing plate; the high-temperature superheater pipeline is arranged in the first through hole in a penetrating manner; the stress absorption assembly comprises a protective sleeve arranged outside the high-temperature superheater pipeline in a sleeving mode and a comb-shaped plate connected with the protective sleeve and the ceiling superheater pipeline.

Description

TECHNICAL FIELD

[0001] The utility model relates to a boiler technology field more specifically, relate to a kind of boiler wall pipe sealing device. BACKGROUND

[0002] The main combustion mode of large-scale boiler of coal-fired power plant is pulverized coal combustion, raw coal is ground into coal powder of certain fineness by coal mill, and the coal powder is burned in the furnace of boiler by air, to provide heat source for boiler, the furnace of boiler has a large space, and the coal powder is suspended in the space and burned, and dense pipes (called water-cooled wall) are arranged on the wall around the furnace, water or mixture of water and steam flows through the pipes, which can absorb the radiation heat of high-temperature combustion in the furnace and protect the furnace wall from being damaged.

[0003] The high-temperature superheater pipe of the boiler passes through the sealing plate and enters the furnace, and the superheater pipe and the ceiling pipe are perpendicular to each other (as shown in the description). Figure One In actual long-term application, the sealing box hinders the free expansion of the pipe, which causes the high-temperature superheater pipe to crack, seriously affects the safe operation of the unit, and causes "non-stop" loss. CONTENT OF THE UTILITY MODEL

[0004] The utility model solves the technical problems that the high-temperature superheater pipe of the boiler passes through the sealing plate and enters the furnace, and the superheater pipe and the ceiling pipe are perpendicular to each other (as shown in the description). Figure One In actual long-term application, the sealing box hinders the free expansion of the pipe, which causes the high-temperature superheater pipe to crack, seriously affects the safe operation of the unit, and causes "non-stop" loss.

[0005] The utility model adopts the technical scheme that:

[0006] A kind of boiler wall pipe sealing device is constructed, comprising:

[0007] The ceiling superheater pipe is provided with a plurality of ceiling superheater pipes, and the plurality of ceiling superheater pipes are connected by sealing plate, and the sealing plate is provided with first through hole penetrating its top and bottom;

[0008] The high-temperature superheater pipe is arranged in the first through hole.

[0009] The stress absorption assembly comprises a protective sleeve sleeved outside the high-temperature superheater pipe and a comb-shaped plate connected with the protective sleeve and the ceiling superheater pipe.

[0010] Optionally, the top of the ceiling superheater pipe is provided with a sealing box, a second through hole for the high-temperature superheater pipe to pass through is formed in the middle of the sealing box, and the sealing box is provided with cast sealing material.

[0011] Optionally, the protective sleeve is made of the same material as the high-temperature superheater pipe, and the top and bottom of the protective sleeve are welded to the high-temperature superheater pipe.

[0012] Optionally, the comb-shaped plate is welded to the protective sleeve and the ceiling superheater pipe.

[0013] Optionally, a plurality of high-temperature superheater pipes are provided, and each two high-temperature superheater pipes form a group, and the protective sleeves outside each group of high-temperature superheater pipes are connected through the comb-shaped plate.

[0014] Optionally, the cast sealing material is uniformly mixed by refractory aggregate, powder, binder and additive.

[0015] Optionally, the binder can be cement, water glass or organic resin.

[0016] Optionally, the additive can be water reducing agent, thickening agent, explosion-proof agent or antioxidant.

[0017] The beneficial effects of the utility model lie in:

[0018] The first through hole in the sealing plate provides an accurate passing position for the high-temperature superheater pipe, reduces the air and ash leakage caused by the pipe passing through the wall, helps to maintain the negative pressure condition inside the boiler, reduces heat loss, improves the thermal efficiency of the boiler, the stress absorption assembly comprises a protective sleeve sleeved outside the high-temperature superheater pipe and a comb-shaped plate connected with the protective sleeve and the ceiling superheater pipe, so that when the high-temperature superheater pipe expands, the expansion stress is absorbed by the comb-shaped plate or acts on the protective sleeve, without damaging the pipe passing through the wall, avoiding cracking of the pipe passing through the wall, the comb-shaped plate and the protective sleeve can effectively absorb and disperse the stress, prevent the pipe from being damaged due to excessive stress, reduce stress concentration and wear caused by vibration and thermal expansion, and help to prolong the service life of the boiler and the pipe. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the present application will be further described below with reference to the drawings and embodiments, and the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the premise of the drawings.

[0020] Figure 1 It is the overall cut schematic diagram of the present application.

[0021] Figure 2 It is the overall top schematic diagram of the present application.

[0022] Figure 3 It is the overall side schematic diagram of the present application.

[0023] The reference signs are:

[0024] 100, ceiling superheater pipe; 110, sealing plate;

[0025] 200, high-temperature superheater pipe; 210, sealing box; 212, pouring sealing material;

[0026] 300, stress absorption assembly; 310, protective sleeve; 320, comb-shaped plate. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme in the present application will be clearly and completely described below with reference to the drawings in the present application. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0028] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0029] In the embodiments of the present application, unless specifically defined and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature can be above or obliquely above the second feature, or only indicate that the first feature is higher than the second feature in horizontal height. The first feature can be below or obliquely below the second feature, or only indicate that the first feature is lower than the second feature in horizontal height.

[0030] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0031] The utility model embodiment such as Figures 1-3As shown in the figure, it relates to a boiler wall tube sealing device, comprising a ceiling superheater pipe 100, a high-temperature superheater pipe 200, a stress absorption assembly 300, the ceiling superheater pipe 100 is provided with a plurality of, and the plurality of ceiling superheater pipes 100 are connected by a sealing plate 110, the sealing plate 110 is provided with a first through hole penetrating through the top and bottom thereof; the high-temperature superheater pipe 200 is arranged in the first through hole; the stress absorption assembly 300 comprises a protective sleeve 310 sleeved outside the high-temperature superheater pipe 200 and a comb-shaped plate 320 connected with the protective sleeve 310 and the ceiling superheater pipe, further, the first through hole on the sealing plate 110 provides an accurate arrangement position for the high-temperature superheater pipe 200, reduces the air and ash leakage problem caused by the pipe penetrating the wall, and helps to maintain the negative pressure condition inside the boiler, reduces the heat loss, improves the thermal efficiency of the boiler, the stress absorption assembly 300 comprises the protective sleeve 310 sleeved outside the high-temperature superheater pipe 200 and the comb-shaped plate 320 connected with the protective sleeve 310 and the ceiling superheater pipe, so that when the high-temperature superheater pipe 200 is expanded, the expansion stress will be absorbed by the comb-shaped plate 320 or acted on the protective sleeve 310, without damaging the wall-penetrating pipe, avoiding the cracking of the wall-penetrating pipe, the comb-shaped plate 320 and the protective sleeve 310 can effectively absorb and disperse these stresses, prevent the pipe from being damaged due to excessive stress, reduce the stress concentration and wear caused by vibration and thermal expansion, help to prolong the service life of the boiler and the pipe, in some embodiments, an elastic sealing ring is added around the first through hole where the high-temperature superheater pipe 200 is arranged, the sealing ring is made of high-temperature-resistant and wear-resistant materials such as ceramic fiber or graphite, when the pipe is expanded by heat, the elastic sealing ring can absorb part of the expansion amount, maintain the sealing performance, and reduce the air and ash leakage problem.

[0032] In the embodiment, the top of the ceiling superheater pipe 100 is provided with a sealing box 210, a second through hole is formed in the middle of the sealing box 210 for the high-temperature superheater pipe 200 to pass through, and a pouring sealing material 212 is arranged in the sealing box 210. The comb-shaped plate 320 is welded on the top of the sealing box 210. Further, the sealing box 210 can effectively prevent leakage at the connection between the high-temperature superheater pipe 200 and the ceiling superheater pipe 100. The pouring sealing material in the sealing box 210 can fill the small gap between the pipe and the sealing box 210, further improving the sealing effect. The comb-shaped plate 320 is welded on the top of the sealing box 210, which can effectively disperse the stress caused by the thermal expansion of the pipe. In some embodiments, reinforcing ribs are added at the connection between the comb-shaped plate 320 and the sealing box 210 to improve the overall strength and stability of the structure. The reinforcing ribs can disperse the stress caused by the thermal expansion of the pipe or other factors to prevent the connection from breaking.

[0033] In the embodiment, the material of the protective sleeve 310 is the same as that of the high-temperature superheater pipe 200, and the top and bottom of the protective sleeve 310 are welded to the high-temperature superheater pipe 200. Further, since the material of the protective sleeve 310 is the same as that of the high-temperature superheater pipe 200, their expansion coefficients are similar when heated, which helps to reduce the stress caused by the difference in thermal expansion and prevent damage to the pipe or sleeve caused by excessive stress. In the embodiment, the top and bottom of the protective sleeve 310 can be welded to the high-temperature superheater pipe 200 by spot welding. At this time, pouring sealing material 212 can be added between the high-temperature superheater pipe 200 and the protective sleeve 310 to increase the sealing degree of the utility model. In some embodiments, the top and bottom of the protective sleeve 310 can be welded to the high-temperature superheater pipe 200 by circle welding to increase the stability of the utility model while ensuring the sealing degree.

[0034] In the embodiment, the comb-shaped plate 320 is welded to the protective sleeve 310 and the ceiling superheater pipe. Through welding, the comb-shaped plate 320, the protective sleeve 310, and the ceiling superheater pipe form a firm and integral connection, which significantly enhances the stability of the structure and makes the entire system more robust and durable. Welding also helps to disperse the stress caused by the thermal expansion of the pipe or other factors. When the pipe is heated and expanded, welding can absorb and disperse these stresses, preventing damage to the pipe or connecting components caused by stress concentration. In some embodiments, temperature sensors can be installed on the ceiling superheater pipe 100 and the high-temperature superheater pipe 200 to monitor the temperature of the pipe in real time, which helps to detect temperature abnormalities in a timely manner and prevent pipe damage caused by overheating.

[0035] In the embodiment, the high-temperature superheater pipes 200 are provided in plurality, and two high-temperature superheater pipes 200 form a group, the protective sheaths 310 outside the high-temperature superheater pipes 200 in each group are connected by the comb-shaped plates 320, and further, the grouped pipe system is more orderly, facilitating daily management and maintenance. This helps to improve work efficiency and reduce operation difficulty, and the two high-temperature superheater pipes 200 in each group make each group of pipes a relatively independent unit, when a group of pipes fails, it can be quickly isolated and repaired without affecting the normal operation of other groups of pipes. Specifically, the comb-shaped plates 320 as connecting components can effectively disperse the stress generated due to pipe thermal expansion or other factors, when the pipe is heated and expanded, the comb-shaped plates 320 can absorb and disperse these stresses, preventing pipe or connecting component damage caused by stress concentration.

[0036] In the embodiment, the binding agent can be cement, water glass, organic resin, etc.

[0037] In the embodiment, the additive can be water reducing agent, thickening agent, anti-explosion agent, antioxidant, etc. It should be understood that those skilled in the art can make improvements or changes according to the above description, and all these improvements and changes shall belong to the protection scope of the appended claims of the utility model.

Claims

1. A boiler penetration seal apparatus, characterized by, The utility model relates to a stress absorption assembly for high-temperature superheater pipes, comprising: a roof superheater pipe (100) provided with a plurality of roof superheater pipes (100) connected by a sealing plate (110) with a first through hole passing through the top and bottom of the sealing plate (110); a high-temperature superheater pipe (200) passing through the first through hole; a stress absorption assembly (300) comprising a protective sleeve (310) sleeved outside the high-temperature superheater pipe (200) and a comb-shaped plate (320) connected with the protective sleeve (310) and the roof superheater pipe.

2. A boiler penetration sealing device according to claim 1, characterised in that The top of the roof superheater pipe (100) is provided with a sealing box (210) with a second through hole in the middle for the high-temperature superheater pipe (200) to pass through, and the sealing box (210) is provided with a pouring sealing material (212) inside, and the comb-shaped plate (320) is welded on the top of the sealing box (210).

3. A boiler penetration sealing device according to claim 1, characterised in that The protective sleeve (310) is made of the same material as the high-temperature superheater pipe (200), and the top and bottom of the protective sleeve (310) are welded with the high-temperature superheater pipe (200).

4. A boiler penetration sealing device according to claim 1, wherein The comb-shaped plate (320) is welded with the protective sleeve (310) and the roof superheater pipe.

5. A boiler penetration sealing device according to claim 1, wherein The high-temperature superheater pipe (200) is provided with a plurality of high-temperature superheater pipes (200), and each two high-temperature superheater pipes (200) form a group, and the protective sleeve (310) outside each group of high-temperature superheater pipes (200) is connected by the comb-shaped plate (320).

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