Tubular heat exchanger structure

Abstract

The utility model relates to a tubular heat exchanger structure which comprises a plurality of heat exchange tubes, the two ends of each heat exchange tube are respectively connected with a tube plate, the two tube plates are respectively connected with a clamping flange, and the clamping flanges are connected with flange connectors through bolts. The two ends of the outer pipe are each connected with a welding sleeve, and the two welding sleeves are connected to the two pipe plates correspondingly. And an O-shaped ring is arranged between the outer wall of the tube plate and the inner wall of the welding sleeve. A flange sealing ring is arranged between the end face of the flange connector and the end face of the tube plate. A medium inlet is formed in the side wall of one end of the outer pipe, and a medium outlet is formed in the side wall of the other end. The tube plate is flush with the end face of the heat exchange tube. And a baffle plate is arranged in the outer pipe. The tubular heat exchanger structure aims to overcome the existing defects, welding can be conducted in an automatic welding mode, and the welding quality problem is solved.

Description

Technical Field

[0001] The utility model relates to a tubular heat exchanger structure. Background Art

[0002] As food safety requirements become increasingly stringent, more and more products need to be sterilized at high temperatures to meet commercial sterility requirements. Therefore, tubular heat exchangers have become an important part of this process. How to deal with the internal components that are easily damaged during repeated heating and cooling? The original heat exchanger structure is inconvenient to disassemble. Manual welding can only be used during the production process, which will lead to problems such as the inability to guarantee welding quality, the risk of inadequate welding, and a long production cycle.

[0003] Conventional heat exchangers cannot separate the tube sheet and the end joints. The tube sheet is connected to the end joints by welding, and a welding distance of 1-2 mm is required between the tube sheet and the end of the heat exchange tube. Manual welding is used, and the welding quality cannot be controlled. There may be false welding and cold welding, which may lead to the risk of leakage during the subsequent use of the heat exchanger.

[0004] Therefore, a tubular heat exchanger structure is proposed to address the above problems. Utility Model Content

[0005] The purpose of the utility model is to overcome the existing defects and provide a tubular heat exchanger structure, which can be welded by automatic welding to solve the welding quality problem.

[0006] The technical solution for achieving the above-mentioned purpose is: a tubular heat exchanger structure, comprising a plurality of heat exchange tubes, each end of the plurality of heat exchange tubes being connected to a tube sheet, each of the two tube sheets being connected to a clamping flange, and the clamping flanges being connected to flange joints via bolts; each end of the outer tube is connected to a welding sleeve, and the two welding sleeves are respectively connected to the two tube sheets.

[0007] Preferably, an O-ring is provided between the outer wall of the tube sheet and the inner wall of the welding sleeve.

[0008] Preferably, a flange sealing ring is provided between the end face of the flange joint and the end face of the tube sheet.

[0009] Preferably, a medium inlet is provided on one end side wall of the outer tube, and a medium outlet is provided on the other end side wall.

[0010] Preferably, the tube sheet is flush with the end surface of the heat exchange tube.

[0011] Preferably, a baffle is provided inside the outer tube.

[0012] Preferably, the outer wall of the tube plate is provided with a groove, and the O-ring is located in the groove.

[0013] The beneficial effects of the present invention are as follows: the tubular heat exchanger structure is composed of flange joints and clamping flanges connected by bolts at both ends, and then sealed by flange sealing rings, so as to ensure that the materials in the tube side are isolated from the external environment. During the installation process, the clamping flanges are fixed through the limiting grooves on the tube plate, and then the flange sealing rings are installed, and then the flange joints are installed. The entire installation process is limited by the limiting grooves, and manual adjustment by the installer is not required. During the disassembly process, it is only necessary to remove the connecting bolts to easily replace the flange sealing ring, which meets the requirements of inspection and maintenance during use, major maintenance and daily minor maintenance.

[0014] The tube sheet is set flush with the heat exchange tube, and the welding of the tube sheet and the heat exchange tube can be done by fully automatic welding, which ensures the quality stability of the welding. The new structure of the heat exchanger adopts flange connection. During use, the pressure resistance of the flange is higher than that of the heat exchanger with conventional joints or clamp connections, which greatly improves the practicality of the heat exchanger in some high-pressure working conditions. In the process of heating and cooling, the tube sheets and welding sleeves at both ends of the new structure are sealed with O-rings, and both ends are movable. During use, the stress between the heat exchange tube and the outer tube is different, resulting in different deformation. This structure can eliminate the problem of different deformation between the two, and will not cause desoldering or rupture between the heat exchange tube and the tube sheet, and there will be no problem of weld falling off between the outer tube and the welding sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the tubular heat exchanger of the present utility model.

[0016] In the figure: 1. Flange sealing ring; 2. Bolt; 3. Flange joint; 4. Clamping flange; 5. Welding sleeve; 6. Tube sheet; 7. Outer tube; 8. Heat exchange tube; 9. Baffle; 10. O-ring; 11. Medium inlet; 12. Medium outlet. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center," "up," "down," "left," "right," "vertical," "horizontal," "inside," "outside," and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be construed as limiting the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] like Figure 1 As shown, a tubular heat exchanger structure includes multiple heat exchange tubes 8, each connected to a tube sheet 6 at each end. A snap-on flange 4 is attached to each of the two tube sheets 6. The snap-on flanges 4 are connected to flange joints 3 via bolts 2. A flange sealing ring 1 is provided between the end faces of the flange joints 3 and the end faces of the tube sheet 6. The tube sheet 6 is flush with the end faces of the heat exchange tubes 8. The flange sealing ring 1 uses a special-shaped sealing ring for sealing, forming multiple internal and external sealing surfaces, ensuring that the tubes are isolated from the external environment. During use, the heat exchanger adopts a detachable structure and can be replaced at any time. The flange connection is fixed by bolts, making disassembly for inspection and cleaning more convenient during use.

[0020] Specifically, each end of the outer tube 7 is connected to a welding sleeve 5, which is then connected to two tube sheets 6. An O-ring 10 is positioned between the outer wall of the tube sheet 6 and the inner wall of the welding sleeve 5. The outer wall of the tube sheet 6 is provided with a groove, and the O-ring 10 is positioned within the groove. The O-rings seal the ends, allowing relative movement between the welding sleeve and the tube sheet during heat exchange, thus eliminating stress changes that may occur during use.

[0021] Specifically, a medium inlet 11 is provided on one side wall of the outer tube 7, and a medium outlet 12 is provided on the other side wall. A baffle 9 is provided inside the outer tube 7.

[0022] Specifically, in a tubular heat exchanger structure, the middle tube side carries materials or water, and the shell side carries hot water, tower water, ice water and other media to achieve heating or cooling of materials;

[0023] The two ends of the tubular heat exchanger structure are composed of flange joints 3 and clamping flanges 4 connected by bolts 2, and then sealed by flange sealing rings 1 to ensure that the materials in the pipe are isolated from the external environment. During the installation process, the clamping flanges 4 are fixed through the limiting grooves on the tube sheet 6, and then the flange sealing rings 1 are installed, and then the flange joints 3 are installed. The entire installation process is limited by the limiting grooves, and no manual adjustment is required by the installer. During the disassembly process, it is only necessary to take out the connecting bolts 2 to easily replace the flange sealing ring 1 to meet the maintenance, major maintenance and routine minor maintenance during use; the welding of the tube sheet 6 and the heat exchange tube 8 can be fully automatic. Since the end of the heat exchange tube 8 is flush with the end of the tube sheet 6, the conventional heat exchanger structure requires a welding distance of 1-2 mm between the tube sheet and the end of the heat exchange tube. If manual welding is used, the welding quality cannot be controlled, and it may There are cases of false welding and cold welding, which may lead to the risk of leakage during the subsequent use of the heat exchanger. The structure adopts an automatic welding method in which the tube sheet 6 and the heat exchange tube 8 are flush, which ensures the quality stability of the welding. The heat exchanger with the new structure adopts flange connection. During use, the pressure resistance of the flange is higher than that of the heat exchanger with conventional joints or clamp connections, which greatly improves the practicality of the heat exchanger in some high-pressure working conditions. In the heat exchanger with the new structure, during the heating and cooling process, the tube sheets 6 and the welding sleeves 5 at both ends are sealed with O-rings, and both ends are movable. During use, the stress between the heat exchange tube and the outer tube is different, resulting in different deformation. This structure can eliminate the problem of different deformation between the two, and will not cause desoldering or rupture between the heat exchange tube and the tube sheet, and there will be no problem of weld falling off between the outer tube and the welding sleeve.

[0024] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tubular heat exchanger structure, characterized in that: The invention comprises a plurality of heat exchange tubes (8), each of the two ends of the plurality of heat exchange tubes (8) being connected to a tube sheet (6), each of the two tube sheets (6) being connected to a clamping flange (4), and the clamping flange (4) being connected to a flange joint (3) via a bolt (2); and each of the two ends of an outer tube (7) being connected to a welding sleeve (5), and the two welding sleeves (5) being connected to the two tube sheets (6) respectively.

2. The tubular heat exchanger structure according to claim 1, characterized in that: An O-ring (10) is provided between the outer wall of the tube plate (6) and the inner wall of the welding sleeve (5).

3. The tubular heat exchanger structure according to claim 1, characterized in that: A flange sealing ring (1) is provided between the end surface of the flange joint (3) and the end surface of the tube plate (6).

4. The tubular heat exchanger structure according to claim 1, characterized in that: A medium inlet (11) is provided on one end side wall of the outer tube (7), and a medium outlet (12) is provided on the other end side wall.

5. The tubular heat exchanger structure according to claim 1, characterized in that: The tube sheet (6) is flush with the end surface of the heat exchange tube (8).

6. The tubular heat exchanger structure according to claim 1, characterized in that: A baffle (9) is provided inside the outer tube (7).

7. The tubular heat exchanger structure according to claim 2, characterized in that: The outer wall of the tube plate (6) is provided with a groove, and the O-ring (10) is located in the groove.

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