Heat exchanger

Abstract

The utility model discloses a heat exchanger, belongs to the technical field of heat exchange equipment, and solves the problems that gaps among fins can cause scaling among the fins, and scales in the gaps are difficult to remove, so that the heat exchanger is not easy to clean after being applied in a water environment for a long time. And the heat exchange efficiency of the heat exchanger with the fins is obviously reduced. Comprising a plurality of heat exchange spiral pipes, upper connecting pipes and lower connecting pipes, the upper connecting pipes and the lower connecting pipes are communicated with the adjacent heat exchange spiral pipes, and the upper connecting pipes and the lower connecting pipes between the adjacent heat exchange spiral pipes are alternately arranged at intervals. Hot fluid is input and flows into the heat exchange pipes after passing through the heat insulation vertical pipes and the heat insulation transverse pipes, the heat exchange pipes are designed in a spiral mode, the screw pitch is large, interval gaps are formed, operators can clean scales in the pipes conveniently, maintenance is facilitated through the design, and efficient heat exchange performance can be kept.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange equipment, in particular to a heat exchanger. Background Art

[0002] Heat exchange tubes are one of the core components in heat exchangers and heat storage devices. They are responsible for carrying fluid and exchanging heat through the tube wall. Heat exchange tubes are usually made of metal materials such as copper, stainless steel or carbon steel, which have good thermal conductivity and can effectively transfer heat. The design and layout of heat exchange tubes are crucial to the performance of the entire heat exchanger.

[0003] Heat exchange tubes can be smooth or have enhanced features, such as finned tubes, which increase heat exchange efficiency by increasing surface area. Heat exchange tubes can be arranged in a variety of ways, including spiral, U-shaped or in-line, each with its own specific application scenarios and advantages.

[0004] In a heat exchanger, hot fluid flows outside the tube, while cold fluid flows inside the tube, achieving heat exchange through the tube wall. The design of heat exchange tubes needs to consider factors such as fluid flow rate, pressure drop, heat transfer efficiency, and corrosion resistance. In addition, the size, shape, and material selection of heat exchange tubes will also affect their performance and cost.

[0005] In order to improve the heat exchange efficiency, the designers of heat exchange tubes will use a variety of technologies, such as optimizing the tube diameter, increasing the tube length, using finned tubes or changing the flow pattern of the fluid. In practical applications, heat exchange tubes need to be cleaned and maintained regularly to avoid scaling and corrosion and ensure the long-term stable operation of the heat exchanger.

[0006] The fin is an extension of the heat exchange tube. It improves the heat exchange efficiency by increasing the contact area with the external low-temperature fluid. In terms of scaling and other problems in actual applications, the fin is more suitable for the environment in contact with the gas. Once it is applied to liquid, such as water, the gap between the fins will cause scaling, and the scaling in the gap is difficult to remove. Therefore, after the heat exchanger is used in the water environment for a long time, the heat exchange efficiency of the heat exchanger with fins will be significantly reduced.

[0007] Therefore, a heat exchanger is proposed to solve or alleviate the above problems. Utility Model Content

[0008] The utility model aims to solve the shortcomings in the prior art and provides a heat exchanger.

[0009] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0010] A heat exchanger includes a mountain-shaped insulated horizontal tube, an insulated vertical tube connected to the insulated horizontal tube, and a plurality of groups of heat exchange tubes connected below the insulated horizontal tube. The heat exchange tubes include a plurality of heat exchange spiral tubes, and upper connecting tubes and lower connecting tubes connecting adjacent heat exchange spiral tubes. The upper connecting tubes and lower connecting tubes are alternately arranged between adjacent heat exchange spiral tubes.

[0011] Preferably, the diameter of the heat exchange spiral tube is the same as that of the upper connecting tube and the lower connecting tube, and the pitch of the heat exchange spiral tube is 3-5 times the diameter of the heat exchange spiral tube.

[0012] Preferably, there is a distance between the upper connecting tube and the heat-insulating transverse tube, and the distance is 3-5 times the diameter of the heat-exchange spiral tube.

[0013] Preferably, the diameters of the heat-insulating horizontal tube and the heat-insulating vertical tube are the same and larger than the diameter of the heat-exchange spiral tube.

[0014] Preferably, the number of the heat exchange spiral tubes in each group of heat exchange tubes is four, the number of the lower connecting tubes in each group of heat exchange tubes is two, the number of the upper connecting tube in each group of heat exchange tubes is one, the heat-insulating transverse tube includes a transverse tube and three longitudinal tubes connected thereto, two of the heat exchange spiral tubes are connected to two adjacent longitudinal tubes, and the remaining two heat exchange spiral tubes are evenly spaced between the two adjacent longitudinal tubes, the two lower connecting tubes are respectively connected to the lower ends of the two outermost heat exchange spiral tubes and the two middle heat exchange spiral tubes, and the upper connecting tube is connected to the upper ends of the two middle heat exchange spiral tubes.

[0015] Preferably, the heat-insulating vertical pipe is coaxially connected with an introduction pipe, the diameter of the introduction pipe is smaller than the diameter of the heat-insulating vertical pipe, and the upper end of the introduction pipe is fixedly connected with a connecting flange.

[0016] Preferably, the thermal conductivity of the insulated vertical tube and the insulated horizontal tube is the same, and the thermal conductivity of the heat exchange tube is greater than the thermal conductivity of the insulated horizontal tube.

[0017] The utility model has the following beneficial effects:

[0018] The utility model can input the fluid with heat through the introduction pipe, and after passing through the heat-insulating vertical pipe and the heat-insulating horizontal pipe, enter the heat exchange tube, and contact the external fluid through the heat exchange spiral tube. Since the pitch of the heat exchange spiral tube is large, there is a large gap between each circle of the heat exchange spiral tube to facilitate the operator to remove the scale attached therein, and at the same time, it can also maintain a good heat exchange effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model.

[0020] 1. Insulated vertical pipe; 2. Inlet pipe; 3. Connecting flange; 4. Insulated horizontal pipe; 5. Heat exchange spiral pipe; 6. Lower connecting pipe; 7. Upper connecting pipe. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] A heat exchanger, such as Figure 1 As shown, it includes a mountain-shaped insulated horizontal pipe 4, an insulated vertical pipe 1 connected to the insulated horizontal pipe 4, and a plurality of groups of heat exchange tubes connected to the bottom of the insulated horizontal pipe 4. The insulated vertical pipe 1 is coaxially connected to an inlet pipe 2, the diameter of the inlet pipe 2 is smaller than the diameter of the insulated vertical pipe 1, and the upper end of the inlet pipe 2 is fixedly connected to a connecting flange 3.

[0023] The heat exchange tubes include a plurality of heat exchange spiral tubes 5, and upper connecting tubes 7 and lower connecting tubes 6 connecting adjacent heat exchange spiral tubes 5. The upper connecting tubes 7 and lower connecting tubes 6 are alternately arranged between adjacent heat exchange spiral tubes 5. The diameter of the heat exchange spiral tubes 5 is the same as that of the upper connecting tubes 7 and the lower connecting tubes 6, and the pitch of the heat exchange spiral tubes 5 is 3-5 times the diameter of the heat exchange spiral tubes 5. There is a spacing between the upper connecting tube 7 and the insulating cross tube 4, and the spacing is 3-5 times the diameter of the heat exchange spiral tubes 5.

[0024] The diameter of the insulated horizontal tube 4 and the insulated vertical tube 1 is the same, and is larger than the diameter of the heat exchange spiral tube 5. The thermal conductivity of the insulated vertical tube 1 and the insulated horizontal tube 4 is the same, and the thermal conductivity of the heat exchange tube is larger than the thermal conductivity of the insulated horizontal tube 4. Specifically, the insulated horizontal tube 4 and the insulated vertical tube 1 can adopt insulated oil pipes, and the heat exchange spiral tube 5, the upper connecting tube 7 and the lower connecting tube 6 are all made of copper.

[0025] There are four heat exchange spiral tubes 5 in each group of heat exchange tubes, two lower connecting tubes 6 in each group of heat exchange tubes, and one upper connecting tube 7 in each group of heat exchange tubes. The heat-insulating transverse tube 4 includes a transverse tube and three longitudinal tubes connected thereto. Two heat exchange spiral tubes 5 are connected to two adjacent longitudinal tubes, and the remaining two heat exchange spiral tubes 5 are evenly spaced between the two adjacent longitudinal tubes. The two lower connecting tubes 6 are respectively connected to the lower ends of the two outermost heat exchange spiral tubes 5 and the two middle heat exchange spiral tubes 5, and the upper connecting tube 7 is connected to the upper ends of the two middle heat exchange spiral tubes 5.

[0026] When the heat exchanger is exchanging heat, it is connected to the external pipeline through the connecting flange 3, so as to realize the connection between the pipeline and the introduction pipe 2. After the connection, the fluid to be heated enters the insulation horizontal pipe 4 through the introduction pipe 2 and the insulation vertical pipe 1. The fluid in the insulation horizontal pipe 4 flows downward through the heat exchange spiral tube 5, and the lower connecting pipe 6 flows to the middle heat exchange spiral tube 5. The two middle heat exchange spiral tubes 5 are connected through the upper connecting tube 7, so that the fluid therein forms a reflux, so that the fluid and the external hot fluid can fully exchange heat. The larger pitch ensures that when the external fluid contacts the heat exchange spiral tube 5, it can ensure that the surfaces of the heat exchange spiral tube 5, the upper connecting tube 7, and the lower connecting tube 6 can all contact with the external fluid. In this way, the external fluid can fully heat the internal fluid. Since the insulation horizontal pipe 4 and the insulation vertical tube 1 can play the role of heat insulation, the structure of this part can contact other containers, so that the heat exchange tube will not directly contact the container, avoiding the heat loss caused by the contact between the fluid and the container.

[0027] In addition, after the external fluid has been in contact with the heat exchange tube for a long time, even if scale is formed on the heat exchange spiral tube 5, the upper connecting tube 7, and the lower connecting tube 6, sufficient space can be maintained on the outside of these structures to facilitate operators to clean the scale attached to the surface of the above structures. In this way, the cleaned heat exchanger can be used again without replacing the heat exchanger.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A heat exchanger, characterized in that: The invention comprises a heat-insulating horizontal tube (4) in a mountain shape, a heat-insulating vertical tube (1) connected to the heat-insulating horizontal tube (4), and a plurality of groups of heat-exchanging tubes connected to the bottom of the heat-insulating horizontal tube (4), wherein the heat-exchanging tubes comprise a plurality of heat-exchanging spiral tubes (5), and an upper connecting tube (7) and a lower connecting tube (6) connected to adjacent heat-exchanging spiral tubes (5), wherein the upper connecting tubes (7) and the lower connecting tubes (6) are alternately arranged between adjacent heat-exchanging spiral tubes (5).

2. A heat exchanger according to claim 1, characterized in that: The diameter of the heat exchange spiral tube (5) is the same as that of the upper connecting tube (7) and the lower connecting tube (6), and the pitch of the heat exchange spiral tube (5) is 3-5 times the diameter of the heat exchange spiral tube (5).

3. A heat exchanger according to claim 1, characterized in that: There is a distance between the upper connecting tube (7) and the heat-insulating transverse tube (4), and the distance is 3 to 5 times the diameter of the heat-exchange spiral tube (5).

4. A heat exchanger according to claim 1, characterized in that: The diameters of the heat-insulating horizontal pipe (4) and the heat-insulating vertical pipe (1) are the same, and are larger than the diameter of the heat-exchange spiral pipe (5).

5. A heat exchanger according to claim 1, characterized in that: The number of the heat exchange spiral tubes (5) in each group of heat exchange tubes is four, the number of the lower connecting tubes (6) in each group of heat exchange tubes is two, and the number of the upper connecting tube (7) in each group of heat exchange tubes is one. The heat-insulating transverse tube (4) comprises a transverse tube and three longitudinal tubes connected thereto. Two of the heat exchange spiral tubes (5) are connected to two adjacent longitudinal tubes, and the remaining two heat exchange spiral tubes (5) are evenly spaced and arranged between the two adjacent longitudinal tubes. The two lower connecting tubes (6) are respectively connected to the lower ends of the two outermost heat exchange spiral tubes (5) and the two middle heat exchange spiral tubes (5), and the upper connecting tube (7) is connected to the upper ends of the two middle heat exchange spiral tubes (5).

6. A heat exchanger according to claim 5, characterized in that: The heat-insulating vertical pipe (1) is coaxially connected to an introduction pipe (2), the diameter of the introduction pipe (2) is smaller than the diameter of the heat-insulating vertical pipe (1), and the upper end of the introduction pipe (2) is fixedly connected to a connecting flange (3).

7. A heat exchanger according to claim 1, characterized in that: The thermal conductivity coefficients of the thermal insulation vertical tube (1) and the thermal insulation horizontal tube (4) are the same, and the thermal conductivity coefficient of the heat exchange tube is greater than the thermal conductivity coefficient of the thermal insulation horizontal tube (4).

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