A heat exchange tube with four tubes

Abstract

The utility model provides a heat exchange tube with four sleeves, comprising a tube (1), a tube (2), a tube (3), and a tube (4) arranged from outside to inside, wherein the tube (2) is inserted into the tube (1), a medium cavity is formed between the tubes (1) and (2), and both ends of the medium cavity are closed, and an inlet and outlet of the medium are arranged on the top of the tube (1); the tube (3) is inserted into the tube (2), a material cavity is formed between the tubes (2) and (3), and an inlet and outlet of the material are arranged on the top of the tube (2); the tube (4) is inserted into the tube (3), a medium cavity is formed between the tubes (3) and (4), and both ends of the medium cavity are closed; the inner cavity of the tube (4) is also a medium cavity, which is mutually connected with the medium cavity formed between the tubes (3) and (4), and the inlet and outlet of the medium are arranged on the tube (4), and the outlet of the medium is arranged on the tube (3). In the heat exchange tube with four sleeves described in the utility model, the material is between two media, and the material flows in the tube in reverse direction to achieve the purpose of heat exchange. The inner and outer sides of the material cavity are completely in contact with the medium, and the heat exchange area is greatly increased.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a heat exchange tube with a sleeve. Background Art

[0002] Heat exchanger is a device that transfers part of the heat of hot fluid to cold fluid. Heat exchanger plays an important role in chemical, petroleum, power, food and many other industrial production.

[0003] The heat exchange tube is one of the main components of the heat exchanger. It is placed inside the cylinder and is used for heat exchange between two media. It has high thermal conductivity and good isothermal properties. It is a device that can quickly transfer heat energy from one point to another with almost no heat loss. Therefore, it is called a heat transfer superconductor. Its thermal conductivity is thousands of times that of copper.

[0004] For the food industry, the heat exchange tubes for different media, different working conditions, different temperatures, and different pressures have different structural types.

[0005] The partition heat exchanger is the most widely used heat exchanger. In a partition heat exchanger, two fluids with different temperatures flow in a space separated by a wall, and heat is exchanged between the two fluids through heat conduction of the wall and convection of the fluid on the wall surface. There are shell and tube type, sleeve and tube type and other types of heat exchangers.

[0006] The most commonly used heat exchanger in the food industry is the shell and tube heat exchanger, which is a type of tubular heat exchanger. It is a concentric shell and tube connected by two standard tubes of different sizes. The outer one is called the shell side and the inner one is called the tube side. Two different media can flow in the shell side and the tube side in reverse (or in the same direction) to achieve the effect of heat exchange. This type of heat exchange is basically suitable for heat exchange of various foods. However, there are still certain limitations. For some special materials, such as those with high viscosity, poor viscous fluidity or granular. The heat transfer resistance is large and the heat exchange effect is very poor.

[0007] For very viscous materials, the fluidity is very poor. The increase in viscosity will lead to an increase in the thickness of the boundary layer (whether it is the laminar boundary layer or the laminar bottom layer of the turbulent boundary layer), thereby increasing the thermal resistance of the boundary layer heat conduction, which leads to a decrease in the intensity of convective heat transfer, so the heat transfer effect is very poor. The traditional partition-type heat exchange tube has only one material cavity and one medium cavity. Although the heat exchange process is also carefully calculated, the actual working conditions and material differences inevitably make the heat exchange less than ideal and fail to achieve the expected effect. Utility Model Content

[0008] The technical problem to be solved by the utility model is to overcome the problems existing in the prior art and provide a heat exchange tube with four sleeves.

[0009] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0010] A heat exchange tube with four sleeves comprises tube 1, tube 2, tube 3 and tube 4 arranged from outside to inside, tube 2 is inserted into tube 1, a medium cavity is formed between tube 1 and tube 2, both ends of the medium cavity are closed, and tube 1 is provided with an inlet and outlet for the medium; tube 3 is inserted into tube 2, a material cavity is formed between tube 2 and tube 3, and tube 2 is provided with an inlet and outlet for the material; tube 4 is inserted into tube 3, a medium cavity is formed between tube 3 and tube 4, and both ends of the medium cavity are closed; the inner cavity of tube 4 is also a medium cavity, which is interconnected with the medium cavity formed between tube 3 and tube 4, tube 4 is provided with an inlet and outlet for the medium, and tube 3 is provided with an outlet for the medium.

[0011] The inlet and outlet of the medium arranged on the tube 1 are on the outer wall of the tube 1 .

[0012] The inlet of the material chamber is arranged on the outer wall of the right end of the tube 2, and the outlet of the material chamber is arranged on the port at the left end of the tube 2.

[0013] The inlet of the medium arranged on the tube 4 is the right end port of the tube 4 , and the outlet is arranged on the outer wall of the right end of the tube 3 .

[0014] The heat exchange tube with four sleeves described in the utility model has the material between two media, and the material flows in the tube in reverse to achieve the purpose of heat exchange. The inner and outer sides of the material cavity are in full contact with the medium, and the heat exchange area is greatly increased. The increase in thermal conductivity will reduce the thermal resistance of the boundary layer, which means that the convective heat transfer intensity will increase, greatly improving the heat exchange effect. The structure is simple and can withstand high pressure. The heat transfer area can be increased or decreased as needed, and it is easy to use. The production efficiency is greatly improved and the manufacturing cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the internal structure of the heat exchange tube described in the utility model.

[0016] Figure 2 It is a schematic diagram of the structure of tube 4.

[0017] Figure 3 It is a schematic diagram of the structure of tube 3.

[0018] Figure 4 It is a schematic diagram of the structure of tube 2.

[0019] Figure 5 It is a schematic diagram of the structure of tube 1. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-5 A heat exchange tube with four sleeves, including tube 1, tube 2, tube 3, and tube 4 arranged from outside to inside. Tube 2 is inserted into tube 1, and medium cavity A is formed between tube 1 and tube 2, and both ends of the medium cavity A are closed. The upper part of tube 1 is provided with a medium inlet and outlet, and the medium inlet and outlet 5 and 6 provided on the upper part of tube 1 are on the outer wall of tube 1. Tube 3 is inserted into tube 2, and material cavity B is formed between tube 2 and tube 3, and the upper part of tube 2 is provided with a material inlet and outlet; tube 4 is inserted into tube 3, and medium cavity C is formed between tube 3 and tube 4, and both ends of the medium cavity are closed; the inner cavity of tube 4 is also medium cavity C, which is interconnected with the medium cavity formed between tube 3 and tube 4, and the inlet of medium is provided on tube 4, and the outlet of medium is provided on tube 3.

[0022] The inlet 7 of the material chamber is arranged on the outer wall of the right end of the tube 2 , and the outlet 8 of the material chamber is arranged on the port at the left end of the tube 2 .

[0023] The medium inlet 9 arranged on the tube 4 is the right end port of the tube 4 , and the outlet 10 is arranged on the outer wall of the right end of the tube 3 .

[0024] As shown in the figure, it is not difficult to see that in traditional heat exchange tubes, materials enter straight tubes, while in existing heat exchange tubes, materials enter annular straight tubes. The material is between two media, and the tube flows in reverse to achieve the purpose of heat exchange. The inside and outside of the material cavity are fully in contact with the medium, and the heat exchange area is greatly increased. The increase in thermal conductivity will reduce the thermal resistance of the boundary layer, which means that the intensity of convective heat transfer will increase, greatly improving the heat exchange effect. The structure is simple and can withstand high pressure. The heat transfer area can be increased or decreased as needed, and it is easy to use. It greatly improves production efficiency and reduces manufacturing costs.

[0025] It is obvious 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 regarded as exemplary and non-restrictive from any point of view, 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. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0026] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A heat exchange tube with four sleeves, characterized in that: The invention comprises a tube 1 (1), a tube 2 (2), a tube 3 (3) and a tube 4 (4) which are arranged from outside to inside. The tube 2 (2) is inserted into the tube 1 (1), a medium cavity is formed between the tube 1 (1) and the tube 2 (2), and both ends of the medium cavity are closed. The tube 1 (1) is provided with a medium inlet and outlet. The tube 3 (3) is inserted into the tube 2 (2), a material cavity is formed between the tube 2 (2) and the tube 3 (3), and the tube 2 (2) is provided with a material inlet and outlet. The tube 4 (4) is inserted into the tube 3 (3), a medium cavity is formed between the tube 3 (3) and the tube 4 (4), and both ends of the medium cavity are closed. The inner cavity of the tube 4 (4) is also a medium cavity, which is interconnected with the medium cavity formed between the tube 3 (3) and the tube 4 (4). The tube 4 (4) is provided with a medium inlet and outlet, and the tube 3 (3) is provided with a medium outlet.

2. The heat exchange tube with four sleeves according to claim 1, characterized in that: The inlet and outlet of the medium arranged on the tube one (1) are on the outer wall of the tube one (1).

3. The heat exchange tube with four sleeves according to claim 1, characterized in that: The inlet of the material chamber is arranged on the outer wall of the right end of the second tube (2), and the outlet of the material chamber is arranged on the port at the left end of the second tube (2).

4. The heat exchange tube with four sleeves according to claim 1, characterized in that: The inlet of the medium arranged on the fourth tube (4) is the right end port of the fourth tube (4), and the outlet is arranged on the outer wall of the right end of the third tube (3).

Images