Water cooling wall for boiler

Abstract

The utility model relates to the technical field of boilers, in particular to a water cooling wall for a boiler, which comprises fins, a plurality of first steel pipes are fixedly connected to the middle of the fins, second steel pipes are fixedly communicated with the middle of the first steel pipes, a plurality of communicating holes are formed in the middle of the fins, and a plurality of first connecting frames are fixedly connected to the top ends of the fins. The middle of the first connecting frame is attached to the first steel pipe, a plurality of first connecting pieces are fixedly connected to the top ends of the fins, and the first connecting pieces are fixedly connected with the first connecting frame. Compared with the prior art, the effect of reinforcing the connection between the fins and the first steel pipes through the first connecting frames is good, and the situation that the joints of the fins and the first steel pipes crack is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to a water-cooled wall of a boiler. Background Art

[0002] The water-cooled wall is the main heating part of the boiler. It is composed of several rows of steel pipes distributed around the boiler furnace. Its interior is flowing water or steam, and the outside world receives the heat of the boiler furnace flame. It is the boiler heating surface that mainly absorbs the radiant heat released by the flame and high-temperature flue gas in the furnace. It is the main type of evaporation heating surface of various modern boilers and is also a basic component in the boiler water circulation loop.

[0003] In the prior art, a Chinese patent with the announcement number CN220017330U proposes a high-density membrane water-cooled wall, which strengthens the support and fixation of the entire water-cooled system through brackets and hangers to prevent pipeline vibration, deformation, etc.; a water flow meter and a temperature detector are added to stabilize the water supply speed and uniformity to ensure stable operation and excellent performance of the water supply system. However, in actual application, the boiler water-cooled wall is made of metal and is subject to thermal expansion and contraction. The membrane water-cooled wall in the water-cooled wall is welded by steel pipes and fins. The temperature of the steel pipes and fins will be slightly different during use. The membrane water-cooled wall has a small heat storage capacity and is relatively fast in heating and cooling. This will cause the connection between the steel pipes and fins of the membrane water-cooled wall to bear large tensile stress, which is easy to cause cracking at the connection between the steel pipes and fins of the membrane water-cooled wall. Therefore, we disclose a boiler water-cooled wall. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a water-cooled wall for a boiler to solve the problem that the connection between the steel tube and the fin of the membrane water-cooled wall is prone to cracking.

[0005] Based on the above-mentioned purpose, the utility model provides a water-cooled wall for a boiler, including fins, wherein the middle part of the fins is fixedly connected to several first steel pipes, the middle part of the first steel pipes is fixedly connected to the second steel pipes, the middle part of the fins is opened with several connecting holes, the top end of the fins is fixedly connected to several first connecting frames, the middle part of the first connecting frames is in contact with the first steel pipes, the top end of the fins is fixedly connected to several first connecting plates, and the first connecting plates are fixedly connected to the first connecting frames.

[0006] Preferably, the communicating hole is located below the second steel pipe, and both ends of the second steel pipe are fixedly connected to the first steel pipe.

[0007] Preferably, the first connecting frame is U-shaped, and both ends of the first connecting frame are fixedly connected to two adjacent fins.

[0008] Preferably, the first connecting frames are distributed in a rectangular array, the transverse setting value of the first connecting frames is the same as the value of the first steel pipe, and the longitudinal value of the first connecting frames is the same as the value of the first connecting piece.

[0009] Preferably, a second connecting piece is fixedly connected to one side of the fin, a connecting block is fixedly connected to the other side of the fin, a second connecting hole is opened in the middle of the connecting block, and a first connecting hole is opened in the middle of the second connecting piece.

[0010] Preferably, the second connecting hole is a cross-shaped hole, and the transverse central axes of the second connecting hole and the first connecting hole are in the same horizontal plane.

[0011] The beneficial effects of the present invention are as follows: the first connecting frame fixes the position of the first steel pipe by connecting with the fin, thereby avoiding the cracking of the connection caused by the deformation difference between the fin and the first steel pipe due to the temperature difference between the fin and the first steel pipe, so that the first connecting frame has a better effect of reinforcing the connection between the fin and the first steel pipe, reducing the occurrence of cracking at the connection between the fin and the first steel pipe, further reinforcing the connection between the fin and the first steel pipe through the first connecting piece, and the first connecting piece can increase the heating area of ​​the first steel pipe, thereby improving the use effect of the water-cooled wall;

[0012] When two water-cooled walls are vertically connected, the second connecting piece and the connecting block are connected first, and then a cross connecting piece is used to penetrate the first connecting hole and the second connecting hole to connect the second connecting piece and the connecting block, thereby stabilizing the connection effect of the two water-cooled walls and extending the service life of the water-cooled walls. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 This is a schematic diagram of an embodiment of the present utility model;

[0015] Figure 2 This is a schematic diagram of the three-dimensional structure of the connection between the second connecting piece and the connecting block of the utility model;

[0016] The following are marked in the figure:

[0017] 1. Fin; 2. First steel pipe; 3. Second steel pipe; 4. Connecting hole; 5. First connecting frame; 6. First connecting piece; 7. Second connecting piece; 8. Connecting block; 9. First connecting hole; 10. Second connecting hole. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0019] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the usual meanings understood by people with ordinary skills in the field to which this utility model belongs. The "first", "second" and similar words used in this utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0020] like Figure 1 、 Figure 2As shown, a water-cooled wall of a boiler includes fins 1, a plurality of first steel pipes 2 are fixedly connected to the middle of the fins 1, a second steel pipe 3 is fixedly connected to the middle of the first steel pipe 2, a plurality of connecting holes 4 are opened in the middle of the fins 1, a plurality of first connecting frames 5 are fixedly connected to the top of the fins 1, the middle of the first connecting frames 5 are fitted with the first steel pipe 2, a plurality of first connecting pieces 6 are fixedly connected to the top of the fins 1, the first connecting pieces 6 are fixedly connected to the first connecting frames 5, the connecting holes 4 are located below the second steel pipe 3, both ends of the second steel pipe 3 are fixedly connected to the first steel pipe 2, the first connecting frame 5 is U-shaped, the two ends of the first connecting frame 5 are fixedly connected to two adjacent fins 1, the first connecting frames 5 are distributed in a rectangular array, and the horizontal setting value of the first connecting frame 5 is the same as that of the first steel pipe 2 The value of the first connecting frame 5 is the same as the value of the first connecting piece 6. When in use, a number of first steel tubes 2 are fixedly connected through the middle of the fin 1, so that the fin 1 and the first steel tube 2 form a membrane water-cooled wall, which reduces the air leakage in the combustion chamber of the boiler and shortens the cooling time of the start and stop of the boiler. The second steel tube 3 is fixedly connected through the middle of the first steel tube 2, so that the second steel tube 3 can increase the water storage capacity of the inner cavity of the first steel tube 2, and can also slow down the flowing water in the first steel tube 2, change the flow direction of the flowing water, increase the pressure of the water hitting the first steel tube 2 when it flows, and slow down the formation of scale in the first steel tube 2. A number of connecting holes 4 are opened in the middle of the fin 1, so that the high-temperature flue gas in the furnace can increase the flow through the connecting hole 4 with the fin 1 and the first The contact area of ​​the steel tube 2 is optimized to optimize the air flow distribution and improve the situation where the single side of the fin 1 and the first steel tube 2 is heated more. A plurality of first connecting frames 5 are fixedly connected through the top of the fin 1. The middle part of the first connecting frame 5 is in contact with the first steel tube 2, so that the first connecting frame 5 fixes the position of the first steel tube 2 by connecting with the fin 1, avoiding the cracking of the connection caused by the deformation difference of the fin 1 and the first steel tube 2 caused by the temperature difference between the fin 1 and the first steel tube 2. The first connecting frame 5 strengthens the connection effect of the fin 1 and the first steel tube 2, reducing the cracking of the connection between the fin 1 and the first steel tube 2. A plurality of first connecting pieces 6 are fixedly connected through the top of the fin 1. The first connecting piece 6 is fixedly connected to the first connecting frame 5, so that the first connecting piece 6 is further The connection state of the reinforced fin 1 and the first steel tube 2 is improved, and the first connecting piece 6 can increase the heating area of ​​the first steel tube 2, thereby improving the use effect of the water-cooled wall. The connecting hole 4 is located below the second steel tube 3, so that the airflow will first pass through the second steel tube 3 when passing through the connecting hole 4, so that the contact area between the second steel tube 3 and the airflow is larger, and both ends of the second steel tube 3 are fixedly connected to the first steel tube 2. The first connecting frame 5 is U-shaped, and the two ends of the first connecting frame 5 are fixedly connected to the two adjacent fins 1, so that the first connecting frame 5 has a better fixing effect on the fin 1 and the first steel tube 2. The first connecting frames 5 are distributed in a rectangular array, and the horizontal setting value of the first connecting frame 5 is the same as the value of the first steel tube 2, and the longitudinal value of the first connecting frame 5 is the same as the value of the first connecting piece 6.The first connecting frame 5 and the first connecting piece 6 can strengthen the connection between the fin 1 and the first steel pipe 2, and can also increase the heating area of ​​the water-cooled wall and improve the use effect of the water-cooled wall.

[0021] As a preferred implementation in this embodiment, Figure 1 and Figure 2 As shown, one side of the fin 1 is fixedly connected to the second connecting piece 7, the other side of the fin 1 is fixedly connected to the connecting block 8, the middle of the connecting block 8 is provided with a second connecting hole 10, the middle of the second connecting piece 7 is provided with a first connecting hole 9, the second connecting hole 10 is a cross-shaped hole, the transverse central axis of the second connecting hole 10 and the first connecting hole 9 are in the same horizontal plane, the second connecting piece 7 is fixedly connected to one side of the fin 1, the other side of the fin 1 is fixedly connected to the connecting block 8, the middle of the connecting block 8 is provided with a second connecting hole 10, the middle of the second connecting piece 7 is provided with a first connecting hole 9, so that When two water-cooled walls are vertically connected, the second connecting piece 7 and the connecting block 8 can be connected. Then, a cross connector is used to penetrate the first connecting hole 9 and the second connecting hole 10 to connect the second connecting piece 7 and the connecting block 8, thereby stabilizing the connection effect of the two water-cooled walls and extending the service life of the water-cooled walls. The second connecting hole 10 is a cross-shaped hole, and the transverse central axis of the second connecting hole 10 and the first connecting hole 9 are in the same horizontal plane, so that the connection between the second connecting piece 7 and the connecting block 8 can use a cross connector, which is stable and not prone to shaking, and is not prone to loosening after long-term use.

[0022] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Within the scope of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0023] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A water-cooled wall for a boiler, comprising fins (1), characterized in that: The middle of the fin (1) is fixedly connected to a plurality of first steel pipes (2), the middle of the first steel pipe (2) is fixedly connected to a second steel pipe (3), the middle of the fin (1) is provided with a plurality of connecting holes (4), the top of the fin (1) is fixedly connected to a plurality of first connecting frames (5), the middle of the first connecting frame (5) is in contact with the first steel pipe (2), the top of the fin (1) is fixedly connected to a plurality of first connecting pieces (6), and the first connecting pieces (6) are fixedly connected to the first connecting frame (5).

2. The boiler water-cooled wall according to claim 1, characterized in that: The communicating hole (4) is located below the second steel pipe (3), and both ends of the second steel pipe (3) are fixedly connected to the first steel pipe (2).

3. The boiler water-cooled wall according to claim 1, characterized in that: The first connecting frame (5) is U-shaped, and two ends of the first connecting frame (5) are fixedly connected to two adjacent fins (1).

4. The boiler water-cooled wall according to claim 1, characterized in that: The first connecting frames (5) are distributed in a rectangular array, the transverse setting value of the first connecting frames (5) is the same as the value of the first steel pipe (2), and the longitudinal value of the first connecting frames (5) is the same as the value of the first connecting piece (6).

5. The boiler water-cooled wall according to claim 1, characterized in that: One side of the fin (1) is fixedly connected to a second connecting piece (7), and the other side of the fin (1) is fixedly connected to a connecting block (8), a second connecting hole (10) is provided in the middle of the connecting block (8), and a first connecting hole (9) is provided in the middle of the second connecting piece (7).

6. The boiler water-cooled wall according to claim 5, characterized in that: The second connecting hole (10) is a cross-shaped hole, and the transverse central axes of the second connecting hole (10) and the first connecting hole (9) are in the same horizontal plane.

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