Tube bundle and tube box structure of single-row tube of air cooler

Abstract

The air cooler single-row tube bundle tube box structure comprises a steam distribution tube, and a first down-flow tube bundle set, a second down-flow tube bundle set and a counter-flow tube bundle set are arranged on the peripheral side of the steam distribution tube; a first converging tube bundle is fixedly installed on one side of the first downstream tube bundle set and one side of the reverse flow tube bundle set, a second converging tube bundle is installed on one side of the second downstream tube bundle set, the first converging tube bundle and the second converging tube bundle are each composed of a plurality of section tubes, and inserting pieces and locking pieces are arranged between the adjacent section tubes. Each section pipe is provided with the inserting piece and the locking piece, the inserting piece is installed on one section pipe, the locking piece is installed on the other section pipe, and when the two section pipes need to be welded, the inserting pieces and the locking pieces are connected in a clamped mode to form a joint ensuring stable connection, so that a gap between the two section pipes is stabilized, and the welding efficiency is improved. In this way, the adjacent section pipes can be flexibly assembled according to needs, welding is convenient, and meanwhile transportation and installation are convenient.

Description

Technical Field

[0001] The invention relates to the technical field of air coolers, and in particular to a single-row tube bundle tube box structure of an air cooler. Background Art

[0002] As an efficient heat exchange device, air coolers are widely used in industrial fields such as power plants and chemical plants to reduce the exhaust temperature of steam turbines, thereby improving work efficiency. Its core component is the tube bundle structure, which is composed of multiple pipes connected to each other to form a heat transfer network. The traditional air cooler tube bundle structure usually uses welding to connect the pipes, transporting multiple pipes separately, and then welding and assembling them at designated locations to reduce transportation pressure.

[0003] During the welding process, the pipes need to be aligned and placed. However, in actual operation, during the placement, assembly and welding of the pipes, if the placement is not good, the gap between the two pipes is larger on one side and smaller on the other side, or during the welding process, the position between the two pipes is affected by the external environment (factors such as workers walking and accidentally touching each other), resulting in an increase in the weld seam, etc., it is easy to cause the pipes to be misaligned, or the welding difficulty increases, resulting in incomplete welding. Once the welding quality is affected, the risk of high-pressure steam leakage will increase significantly.

[0004] Specifically, the welding gap caused by uneven pipe joints will directly affect the sealing and working reliability of the air cooler.

[0005] Sealing problem: Weld gaps will form leakage channels, causing steam leakage, reducing cycle efficiency and increasing energy loss.

[0006] Reliability issues: Weld defects can easily lead to pipeline ruptures, causing major safety accidents and economic losses. Summary of the invention

[0007] In order to solve at least one of the technical problems mentioned in the background technology, an object of the present invention is to provide a single-row tube bundle tube box structure of an air cooler, which is convenient for welding processing between pipes.

[0008] To achieve the above object, the present invention provides the following technical solutions: an air cooler single-row tube bundle box structure, comprising a steam distribution pipe, a first downstream tube bundle group, a second downstream tube bundle group and a countercurrent tube bundle group are arranged around the steam distribution pipe, and the countercurrent tube bundle group is located between the first downstream tube bundle group and the second downstream tube bundle group; The first downstream tube bundle group and the countercurrent tube bundle group have a first busbar bundle fixedly installed on one side away from the steam distribution pipe, and the second downstream tube bundle group has a second busbar bundle installed on one side away from the steam distribution pipe. The first busbar bundle is not connected to the second busbar bundle.

[0009] The first busbar bundle and the second busbar bundle are both composed of a plurality of tube sections, and plug-ins and locking pieces are provided between adjacent tube sections. The plug-in is installed on one of the tube sections, and the locking piece is installed on another tube section. The gaps between adjacent tube sections are sealed by welding, and when gaps are formed between adjacent tube sections, the locking piece is connected to the plug-in.

[0010] Furthermore, the locking element includes a first flange fixedly mounted on the circumferential side of the joint pipe, the axis of the first flange is parallel to the axis of the joint pipe, one of the axial side surfaces of the first flange is a first surface, the first surface of the first flange and the axial side surface of the joint pipe are in the same plane, a blind hole for inserting the locking element is provided on the first surface of the first flange, and the axis of the blind hole is parallel to the axis of the joint pipe.

[0011] Furthermore, the plug-in includes a second flange fixedly mounted on the circumferential side of the joint pipe, the axis of the second flange is parallel to the axis of the joint pipe, one of the axial side surfaces of the second flange is the second surface, the second surface of the second flange and the axial side surface of the joint pipe are in the same plane, and an insertion rod for inserting into a blind hole is fixedly mounted on the second surface of the second flange.

[0012] Furthermore, there are multiple blind holes distributed circumferentially around the first flange.

[0013] Furthermore, a protrusion is fixedly connected to a side of the first flange away from the first surface, and part of the blind holes is located in the protrusion.

[0014] Furthermore, a plurality of first latch teeth are fixedly installed on the inner wall of the blind hole, and the plurality of first latch teeth are distributed axially along the blind hole. A second latch tooth matched with the first latch teeth is fixedly installed on the lower side of the insertion rod. The maximum distance between the upper side of the first latch tooth and the inner wall of the blind hole in the vertical plane is a first spacing, and the maximum distance between the lower side of the second latch tooth and the peripheral side surface of the insertion rod in the vertical plane is a second spacing. The first spacing is greater than the second spacing. When welding between the first flange and the second flange, the second latch tooth is located between adjacent first latch teeth and abuts against the first latch teeth.

[0015] Furthermore, the first flange and the second flange have the same outer diameter, and when the first surface of the first flange overlaps with the second surface of the second flange, the second latching teeth are located between adjacent first latching teeth and abut against the first latching teeth.

[0016] Furthermore, arc grooves are provided on the first surface of the first flange and the second surface of the second flange, and elastic members are provided in the arc grooves. When the first surface overlaps with the second surface, the two elastic members also overlap.

[0017] Furthermore, the elastic member is an elastic rubber ring, the arc groove is circular, and the elastic rubber ring fills the arc groove. When the two elastic rubber rings are in contact, a sealed cavity is formed within the range of the elastic rubber ring.

[0018] Compared with the prior art, the beneficial effect of the present invention is that by adopting a combination of multiple joint tubes and plug-ins and locks, the busbar bundle can be flexibly assembled. Each joint tube is respectively installed with a plug-in and a lock, the plug-in is installed on one of the joint tubes, and the lock is installed on the other joint tube. When two joint tubes need to be welded, the plug-in and the lock are mutually engaged to form a node to ensure stable connection, thereby stabilizing the gap between the two joint tubes, so that adjacent joint tubes can be flexibly assembled according to needs, which is convenient for welding, transportation and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the first busbar and the second busbar bundle of the present invention; Figure 3 For the present invention Figure 2 A partial enlarged schematic diagram of the structure at center A; Figure 4 It is a schematic diagram of the plug-in structure of the present invention; Figure 5 It is a schematic diagram of the lock structure of the present invention; Figure 6 It is a cross-sectional view of the first flange and the second flange structure of the present invention.

[0020] In the figure: 1, steam distribution pipe; 2, first downstream tube bundle group; 3, second downstream tube bundle group; 4, countercurrent tube bundle group; 5, first converging tube bundle; 6, second converging tube bundle; 7, joint pipe; 8, plug-in; 9, locking piece; 10, first flange; 11, blind hole; 12, second flange; 13, plug-in rod; 14, arc groove; 15, elastic rubber ring; 16, first latch tooth; 17, second latch tooth; 18, bump. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1 and Figure 2The present embodiment provides a single-row tube bundle box structure of an air cooler, including a steam distribution pipe 1, a first downstream tube bundle group 2, a second downstream tube bundle group 3 and a countercurrent tube bundle group 4 are arranged around the steam distribution pipe 1, and the countercurrent tube bundle group 4 is located between the first downstream tube bundle group 2 and the second downstream tube bundle group 3; A first busbar tube bundle 5 is fixedly installed on the side of the first downstream tube bundle group 2 and the countercurrent tube bundle group 4 away from the steam distribution pipe 1, and a second busbar tube bundle 6 is installed on the side of the second downstream tube bundle group 3 away from the steam distribution pipe 1. The first busbar tube bundle 5 is not connected to the second busbar tube bundle 6.

[0023] By setting the steam distribution pipe 1, the first downstream tube bundle group 2, the second downstream tube bundle group 3 and the countercurrent tube bundle group 4, a more efficient steam cooling work efficiency is achieved. Specifically, the steam is first evenly distributed to the first downstream tube bundle group 2 through the steam distribution pipe 1, and the first heat exchange with the air is carried out. The internal water vapor is partially converted into liquid water and enters the first converging tube bundle 5 along the first downstream tube bundle group 2. The remaining water vapor that has not been converted into liquid water enters the countercurrent tube bundle group 4. In the countercurrent tube bundle group 4, the water vapor is cooled again and converted into liquid water. The gas is discharged from the countercurrent tube bundle group 4. At the same time, the water vapor in the steam distribution pipe 1 that has not entered the first downstream tube bundle group 2 will enter the second downstream tube bundle group 3 along the steam distribution pipe 1 for cooling. Due to the countercurrent configuration of the first and second downstream tube bundle groups 3 and the countercurrent tube bundle group 4, sufficient cooling of the steam and water acquisition are achieved, and finally the purpose of efficient and energy-saving cooling is achieved.

[0024] See also Figure 2 and Figure 3 The first busbar bundle 5 and the second busbar bundle 6 at the bottom are relatively long, which makes them inconvenient to transport. Generally, the first busbar bundle 5 and the second busbar bundle 6 are divided into separate pipes, and multiple pipes are transported separately and then welded and assembled at designated locations to reduce transportation pressure.

[0025] Specifically, the first busbar bundle 5 and the second busbar bundle 6 are composed of a plurality of node tubes 7, and plug-ins 8 and locking members 9 are provided between adjacent node tubes 7. The plug-in 8 is installed on one of the node tubes 7, and the locking member 9 is installed on another node tube 7. The gaps between adjacent node tubes 7 are sealed by welding. When gaps are formed between adjacent node tubes 7, the locking member 9 is connected to the plug-in 8.

[0026] See also Figure 2 - Figure 6By adopting a combination of multiple node tubes 7 and plug-ins 8 and locks 9, the busbar bundle can be flexibly assembled. Each node tube 7 is respectively installed with a plug-in 8 and a lock 9, the plug-in 8 is installed on one node tube 7, and the lock 9 is installed on another node tube 7. When two node tubes 7 need to be welded, the plug-in 8 and the lock 9 are mutually engaged to form a node to ensure stable connection, thereby stabilizing the gap between the two node tubes 7. In this way, adjacent node tubes 7 can be flexibly assembled according to needs, which is convenient for welding, transportation and installation.

[0027] See also Figure 2 , Figure 3 and Figure 5 The lock 9 includes a first flange 10 fixedly mounted on the side of the joint pipe 7, the axis of the first flange 10 is parallel to the axis of the joint pipe 7, one of the axial sides of the first flange 10 is the first surface, the first surface of the first flange 10 and the axial side of the joint pipe 7 are in the same plane, and a blind hole 11 for inserting the lock 9 is provided on the first surface of the first flange 10, and the axis of the blind hole 11 is parallel to the axis of the joint pipe 7. The blind hole 11 is a one-way hole, so that after the gap between the two joint pipes 7 is welded, it can prevent external air from entering the blind hole 11.

[0028] See also Figure 2 , Figure 3 and Figure 4 The plug-in 8 includes a second flange 12 fixedly mounted on the side surface of the joint pipe 7, the axis of the second flange 12 is parallel to the axis of the joint pipe 7, one of the axial side surfaces of the second flange 12 is the second surface, the second surface of the second flange 12 is in the same plane as the axial side surface of the joint pipe 7, and an insertion rod 13 for inserting into the blind hole 11 is fixedly mounted on the second surface of the second flange 12.

[0029] The first flange 10 can be welded to the side of the joint pipe 7, and the second flange 12 can also be welded to the side of the joint pipe 7. Because the first surface of the first flange 10 is coplanar with the axial side surface of the node tube 7, the first flange 10 is located at the edge of the node tube 7. Because the second surface of the second flange 12 is coplanar with the axial side surface of the node tube 7, the second flange 12 is also located at the edge of the node tube 7. When two adjacent node tubes 7 need to be connected, the first flange 10 and the second flange 12 located on one of the node tubes 7 will contact, so that it is convenient to insert the insertion rod 13 on the second flange 12 into the blind hole 11 on the first flange 10. Through the interaction force between the insertion rod 13 and the inner wall of the blind hole 11, the relative position of the first flange 10 and the second flange 12 is positioned, that is, the position of the two adjacent node tubes 7 is positioned. When the gap between the two node tubes 7 is small, welding processing is performed, which is simple and quick.

[0030] There are multiple blind holes 11, which are distributed circumferentially around the first flange 10. The second flange 12 is also provided with a plug rod 13 corresponding to the first flange 10. The multiple plug rods 13 cooperate with the blind holes 11 to improve the support strength and prevent a single plug rod 13 from breaking or the first flange 10 from rotating relative to the second flange 12.

[0031] In order to save materials, a convex block 18 is fixedly connected to the side of the first flange 10 away from the first surface, and part of the blind hole 11 is located in the convex block 18. That is, when the blind hole 11 is drilled on the first flange 10, it will be drilled into the convex block 18. This can reduce the thickness of the entire flange and increase the depth of the blind hole 11.

[0032] When welding the two flanges, the required size of the weld between the two pipe sections 7 varies depending on the welding gun or the size of the welding rod. However, the coordination between the blind hole 11 and the insertion rod 13 makes it difficult to adjust the size of the weld between the two pipe sections 7 .

[0033] See also Figure 4 , Figure 5 and Figure 6 A plurality of first latch teeth 16 are fixedly installed on the inner wall of the blind hole 11, and the plurality of first latch teeth 16 are distributed axially along the blind hole 11. A second latch tooth 17 adapted to the first latch tooth 16 is fixedly installed on the lower side of the insertion rod 13. The maximum distance between the upper side of the first latch tooth 16 and the inner wall of the blind hole 11 on the vertical plane is a first spacing, and the maximum distance between the lower side of the second latch tooth 17 and the peripheral side of the insertion rod 13 on the vertical plane is a second spacing. The first spacing is greater than or equal to the second spacing. When the first flange 10 and the second flange 12 are welded, the second latch tooth 17 is located between adjacent first latch teeth 16 and abuts against the first latch teeth 16.

[0034] A row of first latch teeth 16 arranged axially is fixedly mounted on the lower inner wall of the blind hole 11. Since the first spacing is greater than or equal to the second spacing, that is, when the insertion rod 13 is inserted into the blind hole 11, there is space in the blind hole 11 to accommodate the insertion rod 13 and the second latch teeth 17. Therefore, when the insertion rod 13 and the second latch teeth 17 are inserted into the interior, when the peripheral surface of the insertion rod 13 contacts the upper inner wall of the blind hole 11, the second latch teeth 17 on the insertion rod 13 will not contact the first latch teeth 16. When the insertion rod 13 moves to a suitable position, that is, the spacing between the first flange 10 and the second flange 12 When the requirement is met, the second flange 12 moves downward a short distance relative to the first flange 10, driving the insertion rod 13 and the second latch 17 on the insertion rod 13 to move, so that the second latch 17 is inserted between the adjacent first latch 16. Under the interaction force between the first latch 16 and the second latch 17, the insertion rod 13 will find it difficult to move axially in the blind hole 11. At this time, the distance between the first flange 10 and the second flange 12 is a fixed value, that is, the gap between the two adjacent section pipes 7 is a fixed value, so that the gap between the two section pipes 7 can be determined as needed to facilitate welding.

[0035] The first flange 10 and the second flange 12 have the same outer diameter. When the first surface of the first flange 10 overlaps with the second surface of the second flange 12 , the second latching teeth 17 are located between adjacent first latching teeth 16 and abut against the first latching teeth 16 .

[0036] The first flange 10 and the second flange 12 have the same outer diameter. When the first surface of the first flange 10 overlaps with the second surface of the second flange 12, the second latching teeth 17 are located between the adjacent first latching teeth 16 and are in close contact with the first latching teeth 16. That is, the insertion rod 13 is first inserted into the blind hole 11. At this time, the first flange 10 and the second flange 12 do not overlap. After the spacing between the first flange 10 and the second flange 12 moves to a suitable distance, the second flange 12 moves downward relative to the first flange 10, the first latching teeth 16 and the second latching teeth 17 are engaged, and the first flange 10 and the second flange 12 also overlap, so that when welding, a circle is formed, which is convenient for welding, reduces the occurrence of dead angles, and reduces the difficulty of welding. The first surface of the first flange 10 and the second surface of the second flange 12 are both provided with arc grooves 14 , and elastic members are disposed in the arc grooves 14 . When the first surface overlaps with the second surface, the two elastic members also overlap.

[0037] By providing an arc groove 14 between the two flanges and filling the arc groove 14 with an elastic member, the technical effect of increasing the interaction force between the first latching teeth 16 and the second latching teeth 17 is achieved. When the latching teeth of the flanges are engaged with each other, the elastic member will be compressed, thereby increasing the abutment force between the latching teeth, enhancing the interaction force between the latching teeth, and making the engagement more tight and reliable.

[0038] The elastic member is an elastic rubber ring 15 , the arc groove 14 is circular, and the elastic rubber ring 15 fills the arc groove 14 . When the two elastic rubber rings 15 are in contact, a sealed cavity is formed within the range of the elastic rubber ring 15 .

[0039] The two layers of circular arc grooves 14 and the elastic rubber rings 15 filling them realize a solution of a dynamic sealing cavity. When the two elastic rubber rings 15 abut against each other, they form a sealable cavity, which can effectively isolate gas or liquid leakage. The specific operation process is: first, the first flange 10 with the circular arc groove 14 is abutted against the second flange 12. At this time, the elastic rubber ring 15 will be stretched and fill the remaining gap in this stretching process, and finally form a sealed cavity, which perfectly blocks the leakage of substances.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. An air cooler single-row tube bundle box structure, comprising a steam distribution pipe (1), wherein a first downstream tube bundle group (2), a second downstream tube bundle group (3) and a countercurrent tube bundle group (4) are arranged around the steam distribution pipe (1), and the countercurrent tube bundle group (4) is located between the first downstream tube bundle group (2) and the second downstream tube bundle group (3); A first busbar tube bundle (5) is fixedly mounted on the side of the first downstream tube bundle group (2) and the countercurrent tube bundle group (4) away from the steam distribution pipe (1), and a second busbar tube bundle (6) is mounted on the side of the second downstream tube bundle group (3) away from the steam distribution pipe (1), wherein the first busbar tube bundle (5) is not connected to the second busbar tube bundle (6). The first busbar bundle (5) and the second busbar bundle (6) are both composed of a plurality of node tubes (7), and a plug-in (8) and a locking piece (9) are provided between adjacent node tubes (7). The plug-in (8) is installed on one of the node tubes (7), and the locking piece (9) is installed on another node tube (7). The gap between adjacent node tubes (7) is sealed by welding, and when a gap is formed between adjacent node tubes (7), the locking piece (9) is connected to the plug-in (8).

2. The single-row tube bundle tube box structure of the air cooler according to claim 1 is characterized in that: The locking element (9) comprises a first flange (10) fixedly mounted on the side surface of the joint tube (7); the axis of the first flange (10) is parallel to the axis of the joint tube (7); one of the axial side surfaces of the first flange (10) is a first surface; the first surface of the first flange (10) and the axial side surface of the joint tube (7) are in the same plane; a blind hole (11) for inserting the locking element (9) is provided on the first surface of the first flange (10); the axis of the blind hole (11) is parallel to the axis of the joint tube (7).

3. The single-row tube bundle tube box structure of the air cooler according to claim 2 is characterized in that: The plug-in unit (8) comprises a second flange (12) fixedly mounted on the side surface of the joint tube (7); the axis of the second flange (12) is parallel to the axis of the joint tube (7); one of the axial side surfaces of the second flange (12) is a second surface; the second surface of the second flange (12) and the axial side surface of the joint tube (7) are in the same plane; and an insertion rod (13) for inserting into the blind hole (11) is fixedly mounted on the second surface of the second flange (12).

4. The single-row tube bundle tube box structure of the air cooler according to claim 2 is characterized in that: There are a plurality of blind holes (11), which are distributed circumferentially around the first flange (10).

5. The single-row tube bundle tube box structure of the air cooler according to claim 2, characterized in that: A protrusion (18) is fixedly connected to a side of the first flange (10) away from the first surface, and part of the blind hole (11) is located inside the protrusion (18).

6. The single-row tube bundle tube box structure of the air cooler according to claim 3 is characterized in that: A plurality of first latch teeth (16) are fixedly mounted on the inner wall of the blind hole (11), and the plurality of first latch teeth (16) are distributed axially along the blind hole (11). A second latch tooth (17) matched with the first latch tooth (16) is fixedly mounted on the lower side of the insertion rod (13). The maximum distance between the upper side of the first latch tooth (16) and the inner wall of the blind hole (11) on a vertical plane is a first spacing, and the maximum distance between the lower side of the second latch tooth (17) and the peripheral side surface of the insertion rod (13) on a vertical plane is a second spacing. The first spacing is greater than or equal to the second spacing. When the first flange (10) and the second flange (12) are welded, the second latch tooth (17) is located between adjacent first latch teeth (16) and abuts against the first latch teeth (16).

7. The single-row tube bundle tube box structure of the air cooler according to claim 6, characterized in that: The first flange (10) and the second flange (12) have the same outer diameter; when the first surface of the first flange (10) overlaps with the second surface of the second flange (12), the second latching teeth (17) are located between adjacent first latching teeth (16) and abut against the first latching teeth (16).

8. The single-row tube bundle tube box structure of the air cooler according to claim 7, characterized in that: The first surface of the first flange (10) and the second surface of the second flange (12) are both provided with arc grooves (14), and elastic members are arranged in the arc grooves (14). When the first surface overlaps with the second surface, the two elastic members also overlap.

9. The single-row tube bundle tube box structure of the air cooler according to claim 8, characterized in that: The elastic member is an elastic rubber ring (15), the arc-shaped groove (14) is circular, the elastic rubber ring (15) fills the arc-shaped groove (14), and when the two elastic rubber rings (15) are in contact, a sealed cavity is formed within the range of the elastic rubber ring (15).

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