A boiler heating surface structure

Abstract

The utility model relates to a boiler technical field especially relates to a kind of boiler heating surface structure, including water cooling wall, the water cooling wall is by multiple water cooling pipe composition, the inside hollow of each water cooling pipe, water cooling pipe is coaxially provided with spiral guide vane, the inside fixed of spiral guide vane in water cooling pipe and the inside of water cooling pipe is formed spiral flow channel by separating;Thickening layer;Connecting mechanism.The utility model increases the thickness of one side of the heating surface on water cooling pipe, on the one hand, improve the heat resistance of water cooling wall under high temperature, ensure the stability and reliability of water cooling wall under high temperature environment, on the other hand, thickened water cooling pipe, prevent pipe body from being directly washed and abraded, and the connecting mechanism of detachable use designed, not only can be fixed firm, and replacement maintenance is convenient;Also by the spiral guide vane set, water flow can be guided to form rotating flow along the pipe wall, increase the turbulence degree of fluid, to enhance the heat exchange between water and the pipe wall of water cooling pipe.

Description

Technical Field

[0001] This utility model relates to the field of boiler technology, and in particular to a boiler heating surface structure. Background Technology

[0002] The statements herein provide only background information in relation to this invention and do not necessarily constitute prior art.

[0003] The boiler heating surface refers to the metal wall that separates combustion products from the steam-water working fluid, achieving heat exchange through the metal surface in contact with the flame or flue gas. It mainly consists of water-cooled walls, superheaters, reheaters, and economizers, covering the entire boiler combustion chamber and flue area.

[0004] The water-cooled wall is the main heat-receiving part of the boiler. It consists of several rows of steel pipes distributed around the boiler furnace. Its interior is filled with flowing water or steam. It receives heat from the flames in the boiler furnace and mainly absorbs the radiant heat from the high-temperature combustion products in the furnace. However, during use, the particles of the combustion material will be carried by the airflow to scour, wear and impact the working surface of the water-cooled wall in the combustion chamber, which can easily cause the wall of the heated surface of this part to gradually thin, or even cause tube rupture and boiler shutdown, affecting normal production. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned shortcomings by providing a boiler heating surface structure.

[0006] To solve the above technical problems, the present invention adopts the following technical solution: a boiler heating surface structure, including a water-cooled wall disposed inside the boiler and subjected to high-temperature radiation and convective heat, wherein the water-cooled wall is composed of a plurality of water-cooled tubes disposed in parallel on the inner wall of the boiler, each of the water-cooled tubes being hollow inside, and a spiral guide plate being coaxially disposed inside the water-cooled tube, the spiral guide plate being fixed inside the water-cooled tube and separating the interior of the water-cooled tube to form a spiral flow channel;

[0007] A thickening layer is provided on the outside of the water-cooled pipe and distributed near the hot side of the boiler to increase the thickness of the hot surface of the water-cooled pipe.

[0008] A connecting mechanism is provided on the top of the thickened layer for detachably connecting the thickened layer to the outer wall of the water-cooling pipe.

[0009] Furthermore, the thickened layer is provided with multiple straight flow channels, and the multiple straight flow channels are evenly distributed along the circumference of the thickened layer.

[0010] Furthermore, the connecting mechanism includes a fixing ring fixed on the thickened layer, an insert block disposed inside the fixing ring, and a slot adapted to be inserted into the peripheral surface of the water-cooling pipe.

[0011] Furthermore, an opening is provided on the upper side of the plurality of straight flow channels and on the end face of the thickened layer. The connecting mechanism also includes a communicating cavity disposed on the end face of the fixing ring and communicating with the plurality of openings. A through-hole is provided on the communicating cavity at the end of the insert block. The through-hole extends into the water-cooling pipe and communicates with the interior of the water-cooling pipe.

[0012] Furthermore, the fixing ring includes an elastic annular member, and the two ends of the annular member are respectively provided with a first connecting portion and a second connecting portion;

[0013] After the first connecting part and the second connecting part are aligned, the annular component forms a complete ring.

[0014] Furthermore, both the first connecting part and the second connecting part are provided with one or more screw holes, and a fixing bolt is adapted to be provided in the screw hole.

[0015] The beneficial effects of this utility model are reflected in:

[0016] This invention, through the addition of a thickened layer and a connecting mechanism, increases the thickness of the hot side of the water-cooled tube. This improves the heat resistance of the water-cooled wall at high temperatures, ensuring its stability and reliability in high-temperature environments. Furthermore, the thickened water-cooled tube prevents direct erosion and wear. The designed detachable connecting mechanism not only provides secure fixing but also facilitates replacement and maintenance. Additionally, the spiral guide vanes within the water-cooled tube create a spiral flow channel that guides the water flow along the tube wall, increasing turbulence. This turbulence helps break down the boundary layer of the water flow, enhancing heat exchange between the water and the tube wall. This allows the water-cooled tube to more effectively absorb heat generated inside the boiler, thus transferring heat to the water more efficiently. Attached Figure Description

[0017] Figure 1 This is a perspective view of the overall structure of an embodiment of the present utility model.

[0018] Figure 2 This is an exploded perspective three-dimensional structural view of a portion of the related structure assembled on a water-cooled pipe according to an embodiment of the present invention.

[0019] Figure 3 This is a perspective view of the connecting mechanism according to an embodiment of the present invention.

[0020] In the picture:

[0021] 1. Water-cooled pipe; 2. Spiral guide plate; 3. Thickened layer; 4. Connecting mechanism; 41. Fixing ring; 411. First connecting part; 412. Second connecting part; 42. Insert block; 43. Connecting cavity; 5. Straight flow channel; 6. Slot. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0023] Please see Figure 1-3 This utility model discloses a boiler heating surface structure, including a water-cooled wall installed inside the boiler and subjected to high-temperature radiation and convective heat. The water-cooled wall is composed of multiple water-cooled pipes 1 arranged in parallel on the inner wall of the boiler. The interior of each water-cooled pipe 1 is hollow. A spiral guide plate 2 is coaxially arranged inside the water-cooled pipe 1. The spiral guide plate 2 is fixed inside the water-cooled pipe 1 and separates the interior of the water-cooled pipe 1 to form a spiral flow channel.

[0024] Thickening layer 3 is disposed on the outside of the water-cooled pipe 1 and distributed near the hot side of the boiler to increase the hot surface thickness of the water-cooled pipe 1;

[0025] A connecting mechanism 4 is disposed on the top of the thickened layer 3, for making the thickened layer 3 detachably connected to the outer wall of the water-cooling pipe 1.

[0026] In specific implementation, the water-cooled wall is composed of multiple parallel water-cooled tubes 1 arranged inside the boiler, and the spiral guide plates 2 are coaxially welded inside each water-cooled tube 1 that constitute the water-cooled wall and the spiral flow channels formed by the spiral guide plates 2 inside the water-cooled tube 1 can guide the water flow to form a rotating flow along the tube wall, increase the degree of fluid turbulence, and the turbulence helps to break the boundary layer of the water flow, enhance the heat exchange between the water and the tube wall of the water-cooled tube 1, so that the water-cooled tube 1 can absorb the heat generated inside the boiler more effectively, thereby transferring the heat to the water more efficiently.

[0027] A thickened layer 3 is detachably connected to the outside of the water-cooled pipe 1 using a connecting mechanism 4. Since the thickened layer 3 is arranged towards the heat, it thickens the hot surface of the water-cooled wall, improves the heat resistance of the water-cooled wall at high temperatures, and ensures the stability and reliability of the water-cooled wall in high-temperature environments.

[0028] It should be noted that the thickened layer 3 uses a coating material with high thermal conductivity (such as a copper alloy coating or a ceramic coating), which can further improve the heat conduction efficiency and reduce heat concentration;

[0029] Furthermore, a sufficient expansion gap is left between the thickened layer 3 and the water-cooling pipe 1 to prevent deformation and warping after expansion.

[0030] In one embodiment, a plurality of straight flow channels 5 are provided through the thickened layer 3, and the plurality of straight flow channels 5 are evenly distributed along the circumference of the thickened layer 3. This design allows fluid to enter the interior of the thickened layer 3 through the plurality of straight flow channels 5 vertically penetrating the thickened layer 3, thereby further increasing the heat conduction area and heat conduction capacity of the water-cooled wall.

[0031] It should be further noted that the lower sides of two adjacent thickened layers 3 can be connected by means of conduits and screws, so that the straight flow channels 5 that penetrate vertically through the end face of the thickened layer 3 assembled on the water cooling pipe 1 are interconnected.

[0032] In one embodiment, the connecting mechanism 4 includes a fixing ring 41 fixed to the thickened layer 3 and an insert 42 disposed inside the fixing ring 41. The peripheral surface of the water-cooling pipe 1 is provided with a slot 6 adapted to the insertion of the insert 42. With this design, by fixing the fixing ring 41 on the top of the thickened layer 3 using methods including but not limited to screws, when the thickened layer 3 is closed on the heat-facing side of the water-cooling pipe 1, the insert 42 integrally formed inside the fixing ring 41 will be adapted to be inserted into the slot 6 on the peripheral surface of the water-cooling pipe 1. The adapted combination of the above structures can fix the thickened layer 3 to the outer wall of the water-cooling pipe 1, increase the thickness of the heat-facing surface of the water-cooling pipe 1, improve the heat resistance of the water-cooling pipe 1 at high temperatures, and ensure the stability and reliability of the water-cooling pipe 1 in high-temperature environments.

[0033] In one embodiment, the upper side of the plurality of straight flow channels 5 and the end face of the thickened layer 3 are provided with openings. The connecting mechanism 4 further includes a communicating cavity 43 disposed on the end face of the fixing ring 41 and communicating with the plurality of openings. The communicating cavity 43 is provided with a through-hole at the end of the insert block 42, and the through-hole extends into the water-cooling pipe 1 and communicates with the interior of the water-cooling pipe 1. This design, by having the openings on the end face of the thickened layer 3 correspondingly communicating with the plurality of straight flow channels 5, and the communicating cavity 43 at the corresponding opening position on the end face of the fixing ring 41 and the through-hole at the end of the insert block 42 on the communicating cavity 43, allows the interior of the water-cooling pipe 1 to communicate with the vertically penetrating straight flow channels 5 on the thickened layer 3, thereby improving the heat resistance of the water-cooled wall and increasing its thermal conductivity.

[0034] In one embodiment, the fixing ring 41 includes an elastic annular member, and the two ends of the annular member are respectively provided with a first connecting portion 411 and a second connecting portion 412;

[0035] After the first connecting part 411 and the second connecting part 412 are mated, the annular component forms a complete ring. This design, using the integrally formed first connecting part 411 and second connecting part 412 at both ends of the annular component, and the annular component manufactured with an elastic structure, allows the annular component to be joined together to form a complete ring after the first connecting part 411 and the second connecting part 412 are mated, which can be used to fix the thickened layer 3 onto the water-cooling pipe 1.

[0036] It should be noted that the elastic ring-shaped part can deform towards or away from each other, making it easy to insert into the connecting mechanism 4, which is fixedly snapped onto the outer circumference of the top of the water-cooling pipe 1.

[0037] In one embodiment, both the first connecting portion 411 and the second connecting portion 412 are provided with one or more screw holes, and a fixing bolt is adapted to be installed in the screw hole. With this design, by machining one or more screw holes at corresponding positions on the first connecting portion 411 and the second connecting portion 412, and by using bolts to be rotated and passed through the screw holes on the first connecting portion 411 and the second connecting portion 412 in sequence for fixation, the fixing ring 41 is fixed on the water cooling pipe 1.

[0038] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0039] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0040] Additionally, "multiple" refers to two or more.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A boiler heating surface structure, characterized in that: The water-cooled wall is installed inside the boiler and subjected to high-temperature radiation and convective heat. The water-cooled wall is composed of multiple water-cooled pipes (1) arranged in parallel on the inner wall of the boiler. Each water-cooled pipe (1) is hollow inside. A spiral guide plate (2) is coaxially arranged inside the water-cooled pipe (1). The spiral guide plate (2) is fixed inside the water-cooled pipe (1) and separates the inside of the water-cooled pipe (1) to form a spiral flow channel. A thickening layer (3) is provided on the outside of the water-cooled pipe (1) and distributed near the hot side of the boiler to increase the hot surface thickness of the water-cooled pipe (1); A connecting mechanism (4) is provided on the top of the thickened layer (3) for making the thickened layer (3) detachably connected to the outer wall of the water-cooling pipe (1).

2. The boiler heating surface structure according to claim 1, characterized in that: Multiple straight flow channels (5) are provided through the thickened layer (3), and the multiple straight flow channels (5) are evenly distributed along the circumference of the thickened layer (3).

3. The boiler heating surface structure according to claim 2, characterized in that: The connecting mechanism (4) includes a fixing ring (41) fixed on the thickened layer (3) and an insert (42) located inside the fixing ring (41). The circumferential surface of the water cooling pipe (1) is provided with a slot (6) adapted to the insertion of the insert (42).

4. The boiler heating surface structure according to claim 3, characterized in that: The upper side of the multiple straight flow channels (5) and the end face of the thickened layer (3) are provided with openings. The connecting mechanism (4) also includes a connecting cavity (43) provided on the end face of the fixing ring (41) and communicating with the multiple openings. The connecting cavity (43) is provided with a through-hole at the end of the insert (42). The through-hole extends into the water cooling pipe (1) and communicates with the inside of the water cooling pipe (1).

5. The boiler heating surface structure according to claim 3, characterized in that: The fixing ring (41) includes an elastic ring member, and the two ends of the ring member are respectively provided with a first connecting part (411) and a second connecting part (412). After the first connecting part (411) and the second connecting part (412) are connected, the annular part forms a complete ring.

6. The boiler heating surface structure according to claim 5, characterized in that: Both the first connecting part (411) and the second connecting part (412) are provided with one or more screw holes, and a fixing bolt is adapted to be provided in the screw hole.

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