Composite tube plate finned tube type protective gas cooler

Abstract

The utility model discloses a composite tube plate finned tube type protective gas cooler, which relates to the technical field of protective gas coolers, and comprises a water inlet / outlet flange, a water chamber, an upper layer tube plate, a lower layer tube plate, a square flange, a plurality of heat exchange tubes and rolling type annular fins, each heat exchange tube is an integrally-formed U-shaped tube, and a plurality of through openings used for being connected with the heat exchange tubes are formed in the upper-layer tube plate. The heat exchange tube is an integrally-formed U-shaped tube, the whole tube is free of welding spots, structural blockage and cracking are avoided, the lower-layer tube plate, the composite linkage protection plate and the upper-layer tube plate are designed at the position where the heat exchange tube is connected with the water chamber, stability of the heat exchange tube is guaranteed in an external welding mode, meanwhile, a cavity is formed through the composite linkage protection plate, and the heat exchange tube is more stable. And the leakage detection assembly is arranged, leakage between the heat exchange pipe and the water chamber is monitored, and safety is high.

Description

Technical Field

[0001] The utility model relates to the technical field of protective gas coolers, in particular to a composite tube plate fin tube type protective gas cooler. Background Art

[0002] Shielding gas (N2+H2) coolers are used to cool strip in cold rolling mills' galvanizing lines and continuous annealing furnaces. These furnaces are filled with shielding gas containing a low dew point and low oxygen content, allowing the strip to undergo a reducing atmosphere. These coolers are critical to the strip cooling process and are typically constructed using fin-and-tube heat exchangers. The key to this equipment is ensuring long-term operational stability and absolute watertightness.

[0003] Existing fin-tube coolers have at least the following drawbacks: 1. The heat exchange tubes are typically connected using multiple welds. During use, scaling easily forms at these weld points, which can clog the tubes over time. Furthermore, under high-temperature conditions, these welds can crack, leaking water into the furnace and raising the shielding gas dew point. 2. The connections between the heat exchange tubes and the inlet and outlet water pipes are simple, typically consisting of a simple separate water tank welded to the inlet pipe flange, which lacks stability and leak protection. Utility Model Content

[0004] In response to the above-mentioned deficiencies in the prior art, the utility model provides a composite tube sheet finned tube type protected gas cooler. The heat exchange tube adopts an integrally formed U-shaped tube. The entire tube has no welding points to avoid structural blockage and cracking. The position where the heat exchange tube is connected to the water chamber is designed with a lower tube sheet, a composite link guard plate and an upper tube sheet. The stability of the heat exchange tube is ensured by external welding. At the same time, a cavity is formed by the composite link guard plate, and a leak detection component is provided to monitor whether there is enough leakage between the heat exchange tube and the water chamber, which has high safety.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a composite tube sheet finned tube type protective gas cooler, comprising an inlet and outlet flange, a water chamber, an upper tube sheet, a lower tube sheet, a square flange, a plurality of heat exchange tubes and a rolled annular fin, wherein the rolled annular fin is arranged on a plurality of parallel arranged heat exchange tubes, each heat exchange tube adopts an integrally formed U-shaped tube, the upper tube sheet is provided with a plurality of through holes for connecting the heat exchange tubes, the lower tube sheet is provided with a plurality of through holes corresponding to the heat exchange tubes, the heat exchange tubes pass through the through holes of the lower tube sheet and the tube openings of the heat exchange tubes are aligned with the upper tube sheet. The through-ports of the layer tube sheets are connected, and the outer surface of the heat exchange tube is welded to the lower tube sheet and the upper tube sheet. A method flange is provided on the upper surface of the upper tube sheet, and the water chamber passes through the inside of the method flange and is buckled on the upper surface of the upper tube sheet. Lifting ears are provided on both sides of the method flange and the lifting ears can seal both sides of the water chamber. A partition is provided in the center of the water chamber and the partition separates the through-ports corresponding to the inlet and outlet flanges. A circle of composite link guard plate is provided between the lower tube sheet and the upper tube sheet, and the composite link guard plate can enclose the through hole inside it to form a cavity. The method flange is fixed to the lower tube sheet, and a leak detection component is provided on the side wall of the composite link guard plate.

[0006] Preferably, the leak detection assembly includes a ball valve and an exhaust and drain pipe, the ball valve is connected and arranged on one side of the composite link guard plate, the exhaust and drain pipe is connected and arranged on the other side of the composite link guard plate, and a detachable pipe cap is provided on the exhaust and drain pipe.

[0007] Preferably, windshields are provided around the edges of the upper tube sheet and the lower tube sheet.

[0008] Preferably, side plates are respectively provided at the bottom of the lower tube plate and on both sides of the corresponding heat exchange tubes.

[0009] Preferably, the U-shaped position of the heat exchange tube is provided with a bottom supporting tube sheet, the bottom supporting tube sheet is provided with multiple openings, the U-shaped position of the heat exchange tube is inserted into the opening and the heat exchange tube is welded to the bottom supporting tube sheet.

[0010] Preferably, the bottom supporting tube sheet is provided with a bottom U-shaped guard plate wrapped around the U-shaped position of the heat exchange tube.

[0011] Preferably, the side panels are designed with bent edges.

[0012] Preferably, the upper tube sheet and the lower tube sheet are both designed as composite tube sheets.

[0013] Preferably, the heat exchange tube is made of SUS304 or SUS316.

[0014] The utility model provides a composite tube plate fin tube type protective gas cooler, which has the following beneficial effects:

[0015] The heat exchange tube in this utility model adopts an integrally formed U-shaped tube, and the entire tube has no welding points to avoid structural blockage and cracking. The position where the heat exchange tube is connected to the water chamber is designed with a lower tube plate, a composite link guard plate and an upper tube plate. The stability of the heat exchange tube is ensured by external welding. At the same time, a cavity is formed by the composite link guard plate, and a leak detection component is provided to monitor whether there is enough leakage between the heat exchange tube and the water chamber, which has high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an exploded view of a composite tube plate fin tube type protective gas cooler according to the utility model.

[0017] In the figure: 1. Bottom U-shaped guard plate; 2. Bottom support tube sheet; 3. Heat exchange tube; 4. Side plate; 5. Rolled annular fin; 6. Lower tube sheet; 7. Composite link guard plate; 8. Exhaust and drain pipe; 9. Pipe cap; 10. Wind shield; 11. Upper tube sheet; 12. Square flange; 13. Lifting lug; 14. Partition; 15. Water chamber; 16. Inlet and outlet flange; 17. Ball valve. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0019] like Figure 1As shown, a composite tube sheet finned tube type protective gas cooler includes an inlet and outlet flange 16, a water chamber 15, an upper tube sheet 11, a lower tube sheet 6, a square flange 12, a plurality of heat exchange tubes 3 and a rolled annular fin 5. The rolled annular fin 5 is arranged on a plurality of parallel arranged heat exchange tubes 3. Each heat exchange tube 3 adopts an integrally formed U-shaped tube. The upper tube sheet 11 is provided with a plurality of through holes for connecting the heat exchange tubes 3. The lower tube sheet 6 is provided with a plurality of through holes corresponding to the heat exchange tubes 3. The heat exchange tubes 3 pass through the lower tube sheet 6. The through hole and the nozzle of the heat exchange tube 3 are connected to the through hole of the upper tube sheet 11, and the outer surface of the heat exchange tube 3 is welded to the lower tube sheet 6 and the upper tube sheet 11. The upper surface of the upper tube sheet 11 is provided with a method flange 12. The water chamber 15 passes through the inside of the method flange 12 and is buckled on the upper surface of the upper tube sheet 11. The method flange 12 is provided with a lifting ear 13 on both sides and the lifting ear 13 can block both sides of the water chamber 15. A partition 14 is provided in the center of the water chamber 15 and the partition 14 separates the opening and corresponds to the inlet and outlet flange 16. A circle of multiple holes is provided between the lower tube sheet 6 and the upper tube sheet 11. The composite link guard plate 7 can surround the through hole to form a cavity inside it, the method flange 12 is fixed to the lower tube plate 6, and the side wall of the composite link guard plate 7 is provided with a leak detection component; the leak detection component includes a ball valve 17 and an exhaust and drain pipe 8, the ball valve 17 is connected and arranged on one side of the composite link guard plate 7, and the exhaust and drain pipe 8 is connected and arranged on the other side of the composite link guard plate 7, and a pipe cap 9 is detachably provided on the exhaust and drain pipe 8; the edges of the upper tube plate 11 and the lower tube plate 6 are surrounded by a windshield 10; the bottom of the lower tube plate 6 Side plates 4 are respectively provided on both sides of the corresponding heat exchange tubes 3; a bottom supporting tube sheet 2 is provided at the U-shaped position of the heat exchange tube 3, and a plurality of openings are provided on the bottom supporting tube sheet 2. The U-shaped position of the heat exchange tube 3 is inserted into the opening and the heat exchange tube 3 is welded to the bottom supporting tube sheet 2; a bottom U-shaped guard plate 1 is provided on the bottom supporting tube sheet 2 and wrapped around the U-shaped position of the heat exchange tube 3; the side plates 4 are designed with edge bending; the upper tube sheet 11 and the lower tube sheet 6 are both designed with composite tube sheets; the heat exchange tube 3 is made of SUS304 or SUS316.

[0020] The detailed connection means are well-known in the art. The following mainly introduces the working principle and process, which are as follows:

[0021] According to the instruction manual Figure 1As can be seen, the partition 14 in the center of the water chamber 15 in the present invention is used to separate the opening, so that the opening corresponds to the inlet and outlet flanges 16, which are connected to the external inlet and outlet water pipes. Of course, the opening also corresponds to the inlet and outlet of the heat exchange tube 3. Rolled annular fins 5 are installed on multiple parallel heat exchange tubes 3, which is a well-known technology. The inlet and outlet flanges 16, water chamber 15, square flange 12, upper tube sheet 11 and heat exchange tubes 3 are connected in sequence to form the main body of the cooler. In the present invention, each heat exchange tube 3 is a one-piece U-shaped tube, with no welds in the entire tube, to avoid structural blockage and cracking. A composite link guard plate 7, capable of enclosing the through-holes, is positioned between the lower tube sheet 6 and the upper tube sheet 11. A flange 12 secures the lower tube sheet 6, thereby simultaneously securing the composite link guard plate 7 and the upper tube sheet 11. The outer surfaces of the heat exchange tubes 3 are welded to the lower tube sheet 6 and the upper tube sheet 11, ensuring the stability of the heat exchange tubes 3 and preventing them from shaking during operation. The composite link guard plate 7 forms a cavity, and a leak detection assembly installed on the sidewall of the composite link guard plate 7 detects leaks at the connection between the heat exchange tubes 3 and the upper tube sheet 11, monitoring the leaks between the heat exchange tubes 3 and the water chamber 15, providing high safety.

[0022] Among them, the leak detection component includes a ball valve 17 and an exhaust and drain pipe 8. The ball valve 17 is connected and arranged on one side of the composite link guard plate 7, and the exhaust and drain pipe 8 is connected and arranged on the other side of the composite link guard plate 7. The exhaust and drain pipe 8 is removably provided with a pipe cap 9. An air pump is connected to the outside through the ball valve 17 to inflate the cavity and use soapy water to find leaks.

[0023] Among them, windshield plates 10 are provided around the edges of the upper tube sheet 11 and the lower tube sheet 6, which on the one hand increase stability and on the other hand increase the sealing of the cavity and improve the leak detection accuracy.

[0024] The bottom of the lower tube sheet 6 is equipped with side panels 4 on either side of the corresponding heat exchange tubes 3. These panels are designed with curved edges to increase their strength. A bottom support tube sheet 2 is provided at the U-shaped position of the heat exchange tubes 3. This bottom support tube sheet 2 has multiple openings, which are inserted into the U-shaped position of the heat exchange tubes 3 and welded to the bottom support tube sheet 2. A bottom U-shaped guard plate 1 is provided on the bottom support tube sheet 2, wrapping around the U-shaped position of the heat exchange tubes 3. All of this is to increase the stability of the heat exchange tubes 3.

[0025] The upper tube sheet 11 and the lower tube sheet 6 both adopt a composite tube sheet design; the heat exchange tube 3 is made of SUS304 or SUS316.

[0026] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A composite tube sheet fin tube type protective gas cooler, characterized in that: The invention comprises an inlet and outlet flange (16), a water chamber (15), an upper tube sheet (11), a lower tube sheet (6), a square flange (12), a plurality of heat exchange tubes (3) and a rolled annular fin (5), wherein the rolled annular fin (5) is arranged on a plurality of heat exchange tubes (3) arranged in parallel, each heat exchange tube (3) adopts an integrally formed U-shaped tube, the upper tube sheet (11) is provided with a plurality of through-holes for connecting the heat exchange tubes (3), the lower tube sheet (6) is provided with a plurality of through-holes corresponding to the heat exchange tubes (3), the heat exchange tubes (3) pass through the through-holes of the lower tube sheet (6), and the tube openings of the heat exchange tubes (3) are connected to the through-holes of the upper tube sheet (11), and the outer surface of the heat exchange tubes (3) is in contact with the lower tube sheet (6) and the upper tube sheet (11). Welding, the upper surface of the upper tube sheet (11) is provided with a method flange (12), the water chamber (15) passes through the inside of the method flange (12) and is buckled on the upper surface of the upper tube sheet (11), the method flange (12) is provided with ears (13) on both sides, and the ears (13) can block both sides of the water chamber (15), a partition (14) is provided in the center of the water chamber (15), and the partition (14) separates the opening and corresponds to the inlet and outlet flange (16), a circle of composite link guard plate (7) is provided between the lower tube sheet (6) and the upper tube sheet (11), the composite link guard plate (7) can surround the through hole inside it to form a cavity, the method flange (12) is fixed to the lower tube sheet (6), and the side wall of the composite link guard plate (7) is provided with a leak detection component.

2. The composite tube sheet fin tube type shielding gas cooler according to claim 1, characterized in that: The leak detection assembly comprises a ball valve (17) and an exhaust and drain pipe (8), wherein the ball valve (17) is arranged on one side of the composite link guard plate (7), and the exhaust and drain pipe (8) is arranged on the other side of the composite link guard plate (7), and a pipe cap (9) is detachably provided on the exhaust and drain pipe (8).

3. The composite tube sheet fin tube type shielding gas cooler according to claim 1, characterized in that: Windshields (10) are provided around the edges of the upper tube plate (11) and the lower tube plate (6).

4. The composite tube sheet fin tube type shielding gas cooler according to claim 1, characterized in that: Side plates (4) are respectively provided at the bottom of the lower tube plate (6) and at positions on both sides corresponding to the heat exchange tubes (3).

5. The composite tube sheet fin tube type shielding gas cooler according to claim 1, characterized in that: The U-shaped position of the heat exchange tube (3) is provided with a bottom support tube sheet (2), and a plurality of openings are provided on the bottom support tube sheet (2). The U-shaped position of the heat exchange tube (3) is inserted into the opening, and the heat exchange tube (3) is welded to the bottom support tube sheet (2).

6. The composite tube sheet fin tube type shielding gas cooler according to claim 5, characterized in that: The bottom supporting tube sheet (2) is provided with a bottom U-shaped protective plate (1) wrapped around the U-shaped position of the heat exchange tube (3).

7. The composite tube sheet fin tube type shielding gas cooler according to claim 4, characterized in that: The side panels (4) are designed with bent edges.

8. The composite tube sheet fin tube type shielding gas cooler according to claim 1, characterized in that: The upper tube sheet (11) and the lower tube sheet (6) both adopt a composite tube sheet design.

9. The composite tube sheet fin tube type shielding gas cooler according to claim 1, characterized in that: The heat exchange tube (3) is made of SUS304 or SUS316.

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