Dry type heat exchanger tube pass structure of in-furnace brazing all-metal structure

Abstract

The utility model discloses a dry-type heat exchanger tube pass structure of a furnace brazing all-metal structure. The dry-type heat exchanger tube pass structure comprises a tube plate, a plurality of heat exchange tubes; and a baffle plate; the tube plate and the heat exchange tube are connected through one-time brazing, the baffle plates are distributed on the heat exchange tube at equal intervals in the horizontal direction at intervals up and down, and the baffle plates are connected to the tube plate through pull rods. The connecting strength and stability between the heat exchange tubes and the tube plates can be improved, the baffle plates can be conveniently installed, the stability and reliability of the whole tube pass structure are improved, and the service life of the tube pass structure is prolonged.

Description

Technical Field

[0001] The utility model relates to a tube-pass structure of a dry heat exchanger with a full-metal structure brazed in a furnace. Background Art

[0002] The traditional dry shell and tube heat exchanger is an expansion connection heat exchange tube structure. For any structure that uses a distributor for distribution and a distributor tube to connect the heat exchange tube, its baffles, whether spiral or arched, are all made of engineering plastics. Among them, the arched baffles require a jacket tube to support the spacing between the plates. Since the traditional tube-side structure assembly is cold processing, the engineering plastic structural parts used can meet the requirements of the operating temperature range, but the connection is unstable, which affects the strength and stability of the connection between the baffle and the heat exchange tube, and thus affects the service life of the tube-side structure. Utility Model Content

[0003] The utility model aims to address the deficiencies in the prior art and to provide a technical solution for the tube side structure of a dry heat exchanger with an all-metal structure brazed in a furnace, which can not only improve the connection strength and stability between the heat exchange tube and the tube sheet, but also facilitate the installation of the baffle, thereby improving the stability and reliability of the entire tube side structure and extending its service life.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A dry heat exchanger tube structure with a full metal structure brazed in a furnace, comprising:

[0006] a tube sheet;

[0007] A number of heat exchange tubes;

[0008] and a number of baffles;

[0009] Features:

[0010] The tube sheet and the heat exchange tube are connected by a single brazing, and the baffles are evenly spaced horizontally on the heat exchange tube, and the baffles are connected to the tube sheet by tie rods. The above structural design not only improves the connection strength and stability between the heat exchange tube and the tube sheet, but also facilitates the installation of the baffle, improves the stability and reliability of the entire tube structure, and extends its service life.

[0011] Furthermore, the heat exchange tubes are made of stainless steel tubes, titanium tubes or copper tubes to improve welding quality.

[0012] Furthermore, the baffles are positioned and fixed by welding, jacket tube spacing support fixation, or a combination of welding and jacket tube spacing support fixation, thereby improving the stability and reliability of the baffle installation.

[0013] Furthermore, the baffles and the jacket tube are both made of metal material, which has a melting point greater than 1000° C., and can replace traditional engineering plastics to extend the service life of the tube structure.

[0014] Furthermore, the brazing filler metal is copper or bronze, and its state is a ring or a paste.

[0015] Furthermore, before the tube sheet and the heat exchange tube are brazed in the furnace, solder needs to be reserved at each welding point to improve the quality of brazing.

[0016] Furthermore, the tube ends of the heat exchange tubes are brazed to the tube sheet through a knurled structure or a wire drawing structure, or are connected to the tube sheet through smooth surface insertion, thereby improving the quality of brazing.

[0017] Furthermore, at least one liquid inlet cover and at least one air collecting cover are provided on the opposite side of the tube sheet to the heat exchange tube. The liquid inlet cover is provided with a liquid inlet pipe, and the air collecting cover is provided with an air outlet pipe. When the refrigerant flows into the heat exchange tube through the liquid inlet pipe, heat exchange is performed between the fluid and the refrigerant in the heat exchange tube, and the gas formed after the heat exchange is discharged through the air outlet pipe.

[0018] Furthermore, the liquid inlet pipe is a straight pipe or a curved pipe, and the gas outlet pipe is a straight pipe or a curved pipe.

[0019] Furthermore, the tube-pass structure is applicable to single-system double-tube-pass, double-system double-tube-pass and multi-system double-tube-pass heat exchangers, thereby increasing the application scope of the tube-pass structure.

[0020] The utility model has the following beneficial effects due to the adoption of the above technical solution:

[0021] 1. The utility model can not only improve the connection strength and stability between the heat exchange tube and the tube sheet, but also facilitate the installation of the baffle, improve the stability and reliability of the entire tube structure, and extend its service life.

[0022] 2. The baffles are positioned and fixed by welding, sheath pipes or a combination of welding and sheath pipes to improve the stability and reliability of baffle installation. At the same time, both the baffles and sheath pipes are made of metal materials with a melting point greater than 1000°C, which can replace traditional engineering plastics and extend the service life of the pipe structure.

[0023] 3. The tube ends of the heat exchange tubes are brazed to the tube sheet through a knurled structure or a wire drawing structure, or connected to the tube sheet through a smooth plug-in to improve the quality of brazing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The utility model is further described below in conjunction with the accompanying drawings:

[0025] Figure 1 It is a schematic diagram of the tube structure of a dry heat exchanger with a full metal structure brazed in a furnace according to the utility model;

[0026] Figure 2 for Figure 1 A partial enlarged view of point Ⅰ in the middle.

[0027] In the figure: 1-tube sheet; 2-heat exchange tube; 3-liquid inlet pipe; 4-liquid inlet cover; 5-gas outlet pipe; 6-gas collecting cover; 7-jacket pipe; 8-baffle; 9-welding point. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0031] like Figure 1 to Figure 2 As shown, a tube structure of a dry heat exchanger with a full metal structure brazed in a furnace according to the utility model is shown, which includes a tube sheet 1, a plurality of heat exchange tubes 2 and a plurality of baffles 8.

[0032] The tube sheet 1 and the heat exchange tube 2 are connected by a single brazing. After the tube end of the heat exchange tube 2 is inserted into the tube sheet 1, a welding point 9 is formed between the tube sheet 1. Before the tube sheet 1 and the heat exchange tube 2 are brazed in the furnace, solder needs to be reserved at each welding point to improve the quality of brazing.

[0033] The heat exchange tube 2 is made of stainless steel, titanium or copper to improve welding quality.

[0034] The tube ends of the heat exchange tubes 2 are brazed to the tube sheet 1 through a knurled structure or a wire drawing structure, or are connected to the tube sheet 1 through smooth plug-in, thereby improving the quality of brazing.

[0035] The tube sheet 1 is provided with at least one liquid inlet cover 4 and at least one gas collecting cover 6 on the opposite side of the heat exchange tube 2. The liquid inlet cover 4 is provided with a liquid inlet pipe 3, and the gas collecting cover 6 is provided with an air outlet pipe 5. When the refrigerant flows into the heat exchange tube 2 through the liquid inlet pipe 3, the fluid exchanges heat with the refrigerant in the heat exchange tube 2, and the gas formed after the heat exchange is discharged through the air outlet pipe 5. The liquid inlet pipe 3 is a straight pipe or a curved pipe, and the air outlet pipe 5 is a straight pipe or a curved pipe. The matching method can be that the liquid inlet pipe is a straight pipe and the air outlet pipe is a curved pipe, or the liquid inlet pipe is a curved pipe and the air outlet pipe is a straight pipe, or both the liquid inlet pipe and the air outlet pipe are straight pipes, or both the liquid inlet pipe and the air outlet pipe are curved pipes. In actual refrigeration conditions, it is preferred to use a structure in which the liquid inlet pipe is a straight pipe and the air outlet pipe is a curved pipe.

[0036] The baffles 8 are distributed on the heat exchange tubes 2 at equal intervals in the horizontal direction, and are connected to the tube sheet 1 via tie rods. The above-mentioned structural design not only improves the connection strength and stability between the heat exchange tubes 2 and the tube sheet 1, but also facilitates the installation of the baffles 8, thereby improving the stability and reliability of the entire tube structure and extending its service life.

[0037] The baffle plate 8 is positioned and fixed by welding, fixed by spacing support of the sheath tube 7, or a combination of welding and fixed by spacing support of the sheath tube 7, so as to improve the stability and reliability of the installation of the baffle plate 8.

[0038] The baffle plate 8 and the jacket tube 7 are both made of metal material, the melting point of which is greater than 1000° C., and can replace traditional engineering plastics to extend the service life of the pipe structure.

[0039] The brazing filler metal is copper or bronze, and its state is ring or paste.

[0040] The tube-pass structure is suitable for single-system double-tube-pass, double-system double-tube-pass and multi-system double-tube-pass heat exchangers, increasing the application scope of the tube-pass structure.

[0041] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention to achieve basically the same technical effects are all included in the protection scope of the present invention.

Claims

1. A dry heat exchanger tube structure with a full metal structure brazed in a furnace, comprising: a tube sheet; A number of heat exchange tubes; and a number of baffles; Features: The tube sheet and the heat exchange tube are connected by brazing once, the baffles are distributed on the heat exchange tube at equal intervals in the horizontal direction, and the baffles are connected to the tube sheet by a tie rod.

2. The dry heat exchanger tube structure of a furnace brazed all-metal structure according to claim 1, characterized in that: The heat exchange tube is made of stainless steel tube, titanium tube or copper tube.

3. The dry heat exchanger tube structure of a furnace brazed all-metal structure according to claim 1, characterized in that: The baffles are positioned and fixed by welding, jacket tube spacing support fixation, or a combination of welding and jacket tube spacing support fixation.

4. The dry heat exchanger tube structure of a furnace brazed all-metal structure according to claim 3, characterized in that: The baffle plate and the jacket tube are both made of metal material.

5. The dry heat exchanger tube structure of a furnace brazed all-metal structure according to claim 1, characterized in that: The brazing filler metal is copper or bronze.

6. The dry heat exchanger tube structure of a furnace brazed all-metal structure according to claim 1, characterized in that: Before the tube sheet and the heat exchange tube are brazed in the furnace, solder needs to be reserved at each welding point.

7. The dry heat exchanger tube structure of a furnace brazed all-metal structure according to claim 1, characterized in that: The tube ends of the heat exchange tubes are brazed to the tube sheet through a knurled structure or a wire drawing structure, or are connected to the tube sheet through smooth surface insertion.

8. The dry heat exchanger tube structure of a furnace brazed all-metal structure according to claim 1, characterized in that: The tube sheet is provided with at least one liquid inlet cover and at least one gas collecting cover on the side opposite to the heat exchange tube. The liquid inlet cover is provided with a liquid inlet pipe, and the gas collecting cover is provided with an air outlet pipe.

9. The dry heat exchanger tube structure of a furnace brazed all-metal structure according to claim 8, characterized in that: The liquid inlet pipe is a straight pipe or a curved pipe, and the air outlet pipe is a straight pipe or a curved pipe.

10. The dry heat exchanger tube structure of a furnace brazed all-metal structure according to claim 1, characterized in that: The tube pass structure is suitable for single-system double-tube passes, double-system double-tube passes and multi-system double-tube passes heat exchangers.

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