Brazing type double-layer tubular heat exchanger

Abstract

The utility model relates to the technical field of heat exchangers, in particular to a brazing type double-layer tubular heat exchanger which can improve the stability of the overall heat exchange performance. Comprising an outer pipe, a flow dividing cover, a baffle, a partition plate and heat exchange inner pipes, the baffle is arranged between the outer pipe and the flow dividing cover, the outer pipe, the flow dividing cover and the baffle are connected in a fastened mode, the partition plate is fixedly installed on the baffle, the interior of the flow dividing cover is divided into two cavities through the partition plate, and the multiple sets of heat exchange inner pipes are arranged on the baffle in a communicating mode. A liquid inlet of each heat exchange inner pipe is formed in the upper side of the partition plate, and a liquid outlet of each heat exchange inner pipe is formed in the lower side of the partition plate.

Description

Technical Field

[0001] This utility model relates to the technical field of heat exchangers, and in particular to a brazed double-layer tube heat exchanger. Background Technology

[0002] In industrial production and energy conversion processes, heat exchangers, as heat exchange devices, directly affect the overall system's operational performance and energy consumption levels through their performance and efficiency. Traditional heat exchangers come in various structures, but they generally suffer from problems such as low heat exchange efficiency, uneven fluid distribution, and high maintenance costs.

[0003] Traditional shell-and-tube heat exchangers, while simple in structure and easy to manufacture, often face problems such as low heat transfer coefficients and difficult cleaning when handling high-viscosity, fouling-prone, or corrosive fluids. Plate heat exchangers, on the other hand, have high heat exchange efficiency, but their pressure-bearing capacity is limited, and their sealing performance is easily affected by fluid properties, thus restricting their application range.

[0004] To address the aforementioned issues, double-tube heat exchangers have gradually gained attention as a novel and efficient heat exchange device. However, traditional double-tube heat exchangers still have certain shortcomings in fluid distribution, mixing, and heat transfer uniformity, especially when handling high flow rates and large flow conditions, where local overheating or undercooling can easily occur, affecting the overall heat exchange performance. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a brazed double-layer tube heat exchanger that can improve the stability of overall heat exchange performance.

[0006] This utility model discloses a brazed double-layer tube heat exchanger, comprising an outer tube, a flow divider, a baffle, a partition, and an inner heat exchange tube. A baffle is provided between the outer tube and the flow divider, and the outer tube, the flow divider, and the baffle are fastened together. The partition is fixedly installed on the baffle and divides the interior of the flow divider into two sets of chambers. Several sets of inner heat exchange tubes are connected and arranged on the baffle. The liquid inlet of each set of inner heat exchange tubes is located on the upper side of the partition, and the liquid outlet of each inner heat exchange tube is located on the lower side of the partition.

[0007] This utility model discloses a brazed double-layer tube heat exchanger, wherein several sets of reinforcing hanging plates are arranged on the upper side inside the outer tube, and the reinforcing hanging plates are fastened to the inner wall of the outer tube. An upper reinforcing rod is inserted through the reinforcing hanging plate and is fastened to a baffle. Several sets of reinforcing support plates are arranged on the lower side inside the outer tube, and the reinforcing hanging plates are fastened to the inner wall of the outer tube. A lower reinforcing rod is inserted through the reinforcing support plate and is fastened to a baffle.

[0008] This utility model discloses a brazed double-layer tube heat exchanger, wherein a temperature probe is inserted through the reinforcing support plate for testing the internal temperature of the outer tube.

[0009] This utility model discloses a brazed double-layer tube heat exchanger, wherein the bottom end of the outer tube is connected to a waste discharge pipe, and the waste discharge pipe is fitted with a sealing plug on a sealing cap.

[0010] This utility model discloses a brazed double-layer tube heat exchanger, wherein the bottom end of the outer tube is provided with two sets of arc-shaped support plates, and each set of arc-shaped support plates is provided with a support frame.

[0011] This utility model discloses a brazed double-layer tube heat exchanger, wherein the top end of the outer tube is provided with two sets of lifting lugs.

[0012] This utility model discloses a brazed double-layer tube heat exchanger, wherein an identification nameplate is provided on the outer wall of the outer tube.

[0013] This utility model discloses a brazed double-layer tube heat exchanger, wherein the waste discharge tube and the outer tube are fastened together by brazing.

[0014] Compared with existing technologies, the advantages of this invention are as follows: By setting a baffle between the outer tube and the flow divider, and installing a partition on the baffle to divide the interior of the flow divider into two sets of chambers, the fluid can flow in a partitioned manner within the heat exchanger. This design helps optimize the fluid flow path, reduce fluid mixing and eddy currents, thereby improving heat exchange efficiency. Simultaneously, the inner tube directly connects the two sets of chambers, allowing for more direct and efficient heat transfer. The combined design of the flow divider and partition ensures that the fluid entering the heat exchanger is evenly distributed to each chamber, avoiding localized overheating or undercooling that is common in traditional double-walled tube heat exchangers under high flow rate and high flow conditions. This uniform fluid distribution enhances the stability of the overall heat exchange performance. The brazing process is used to securely connect components such as the outer tube, flow divider, baffle, and partition, which not only improves the overall structural strength of the heat exchanger but also significantly enhances its pressure resistance. Furthermore, the brazing connection provides excellent sealing performance, effectively preventing fluid leakage and ensuring stable operation of the heat exchanger under harsh conditions. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the heat exchanger inner tube installation structure;

[0017] Figure 3 This is a cross-sectional structural schematic diagram of the present invention;

[0018] Figure 4 yes Figure 3 Enlarged structural diagram of section A in the middle;

[0019] The following are labels in the attached diagram: 1. Outer pipe; 2. Diverter hood; 3. Baffle; 4. Partition; 5. First fluid inlet; 6. First fluid outlet; 7. Heat exchange inner pipe; 8. Second fluid inlet; 9. Second fluid outlet; 10. Reinforcing hanging plate; 11. Upper reinforcing rod; 12. Reinforcing support plate; 13. Lower reinforcing rod; 14. Temperature probe; 15. Waste discharge pipe; 16. Sealing plug; 17. Support frame; 18. Arc-shaped support plate; 19. Lifting lug; 20. Identification plate. Detailed Implementation

[0020] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0021] like Figures 1 to 4 As shown, this utility model discloses a brazed double-layer tube heat exchanger, comprising an outer tube 1, a flow divider 2, a baffle 3, a partition 4, and an inner heat exchange tube 7. A baffle 3 is disposed between the outer tube 1 and the flow divider 2. The outer tube 1, the flow divider 2, and the baffle 3 are fastened together. The partition 4 is fixedly installed on the baffle 3, dividing the interior of the flow divider 2 into two sets of chambers. Several sets of inner heat exchange tubes 7 are connected to the baffle 3, and the liquid inlet of each set of inner heat exchange tubes 7 is located on the upper side of the partition 4. The outlet of the heat exchange inner tube 7 is located on the lower side of the partition 4; a heat exchange chamber is provided inside the outer tube 1, and a second fluid inlet 8 and a second fluid outlet 9 are connected to the outer tube 1; a first fluid inlet 5 and a first fluid outlet 6 are connected to the flow divider 2, and the first fluid inlet 5 and the first fluid outlet 6 are respectively connected to two sets of chambers separated by the partition 4 inside the flow divider 2; a baffle is provided between the outer tube and the flow divider, and a baffle is installed on the baffle. The baffle divides the interior of the flow divider into two chambers, enabling zoned flow of fluid within the heat exchanger. This design optimizes the fluid flow path, reduces fluid mixing and eddy currents, thereby improving heat exchange efficiency. Simultaneously, the inner tubes directly connect the two chambers, allowing for more direct and efficient heat transfer. The combined design of the flow divider and baffle ensures that the fluid entering the heat exchanger is evenly distributed to each chamber, avoiding localized overheating or undercooling that is common in traditional double-tube heat exchangers under high flow rate and high flow conditions. This uniform fluid distribution enhances the stability of the overall heat exchange performance. Brazing is used to securely connect components such as the outer tubes, flow divider, baffles, and baffles, improving the overall structural strength of the heat exchanger and significantly enhancing its pressure resistance. Furthermore, the brazed connection provides excellent sealing performance, effectively preventing fluid leakage and ensuring stable operation of the heat exchanger under harsh conditions.

[0022] In a preferred embodiment, several sets of reinforcing hanging plates 10 are arranged on the upper side inside the outer tube 1. The reinforcing hanging plates 10 are fastened to the inner wall of the outer tube 1. Upper reinforcing rods 11 are inserted through the reinforcing hanging plates 10 and fastened to the baffle 3. Several sets of reinforcing support plates 12 are arranged on the lower side inside the outer tube 1. The reinforcing hanging plates 10 are fastened to the inner wall of the outer tube 1. Lower reinforcing rods 13 are inserted through the reinforcing support plates 12 and fastened to the baffle 3. The reinforcing hanging plates 10 and reinforcing support plates 12 serve as supporting structures, located on the upper and lower sides inside the outer tube 1, respectively, and are fastened to the outer tube 1. The inner wall of tube 1 is connected, providing additional support for the internal components of the entire heat exchanger; this enhances the overall structural stability of the heat exchanger, effectively resisting fluid impact and vibration when handling high flow rates and large flow conditions, and preventing internal components from loosening or being damaged; due to the addition of the reinforcing hanging plate 10, reinforcing support plate 12, and upper and lower reinforcing rods 11 and 13, the pressure-bearing capacity of the entire heat exchanger is significantly improved; the reinforced structure reduces wear of internal components caused by vibration and impact, thereby extending the service life of the heat exchanger; the stable structure also reduces downtime and maintenance costs caused by improper maintenance or accidental damage.

[0023] As a preferred embodiment, a temperature probe 14 is interspersed on the reinforced support plate 12 for testing the internal temperature of the outer tube 1. The temperature probe 14 can monitor the internal temperature of the outer tube 1 in real time and accurately, which helps to promptly detect and adjust potential overheating or overcooling problems, thereby optimizing heat exchange performance. By monitoring the temperature in real time, it is possible to promptly detect and prevent safety accidents that may be caused by excessively high or low temperatures, which helps to improve the overall safety and reliability of the heat exchanger. Based on the data provided by the temperature probe 14, operators can more accurately adjust the operating parameters of the heat exchanger. This data also provides an important reference for the regular maintenance and upkeep of the equipment, which helps to reduce maintenance costs and extend the service life of the equipment. When the heat exchanger malfunctions or its performance deteriorates, the data provided by the temperature probe 14 can serve as an important basis for fault diagnosis. By analyzing the changes in temperature distribution, the problem can be quickly located, providing strong support for rapid repair and resumption of production.

[0024] As a preferred embodiment, the bottom end of the outer tube 1 is connected to a waste discharge pipe 15, and a sealing plug 16 is installed on the sealing cap of the waste discharge pipe 15. The waste discharge pipe 15 makes the cleaning and maintenance of the heat exchanger more convenient. After the heat exchanger has been running for a long time, some impurities, dirt or deposits will accumulate inside. These substances will affect the heat exchange efficiency and may cause corrosion and other problems. By opening the sealing plug 16, the waste liquid or impurities inside can be discharged through the waste discharge pipe 15, thereby facilitating cleaning and maintenance. Regular cleaning of the heat exchanger can remove accumulated dirt and deposits, keep the heat exchange surface clean and smooth, and thus improve the heat exchange efficiency. The presence of the waste discharge pipe 15 makes this cleaning process easier to implement and helps to maintain the long-term efficient operation of the heat exchanger. By cleaning and removing internal impurities in a timely manner, corrosion and wear on the internal structure of the heat exchanger can be reduced, thereby extending its service life.

[0025] As a preferred embodiment, the bottom end of the outer tube 1 is provided with two sets of arc-shaped support plates 18, and each set of arc-shaped support plates 18 is provided with a set of support frames 17. The combined design of the arc-shaped support plates 18 and the support frames 17 can effectively enhance the overall structural stability of the heat exchanger. The arc-shaped design of the arc-shaped support plates 18 helps to better disperse the stress at the bottom end of the outer tube 1. When the heat exchanger is subjected to external pressure or internal fluid pressure, the arc-shaped support plates can evenly transfer the stress to the support frames 17, thereby avoiding structural damage caused by stress concentration. The support frames 17 not only provide stable support, but also make the installation and positioning of the heat exchanger easier. By adjusting the height and position of the support frames, the horizontal installation and precise positioning of the heat exchanger can be easily achieved, reducing errors and inconveniences during the installation process. The arc-shaped support plates 18 and the support frames 17 can also protect the bottom of the heat exchanger from direct impact and wear. In industrial production environments, the bottom of the heat exchanger may come into contact with the ground, other equipment, or transportation vehicles, etc. This design can reduce the risk of bottom damage and extend the service life of the heat exchanger.

[0026] As a preferred embodiment of the above embodiment, the top end of the outer tube 1 is provided with two sets of lifting lugs 19. The lifting lugs 19 provide a convenient interface for the installation and disassembly of the heat exchanger. With the lifting lugs, the heat exchanger can be easily hoisted to the designated position using hoisting equipment, which greatly simplifies the installation and maintenance process and improves work efficiency. The lifting lugs 19 are not only used for hoisting, but also enhance the overall structural stability of the heat exchanger to a certain extent. During the operation of the heat exchanger, certain vibrations and stresses will be generated due to the flow of internal fluids and temperature changes. The lifting lugs, through their robust structure and firm connection with the heat exchanger, help to disperse and resist these vibrations and stresses, thereby protecting the heat exchanger from damage. During the transportation of the heat exchanger, the lifting lugs can be used to easily fix the heat exchanger to the transport vehicle and ensure that it remains stable and smooth during transportation. This helps to reduce the risk of damage during transportation and protect the performance of the heat exchanger from being affected. The design of the lifting lugs allows the heat exchanger to adapt to different installation environments. Whether it is horizontal or vertical installation, it can be achieved by adjusting the position and angle of the lifting lugs. This flexibility makes the application of the heat exchanger in industrial production more widespread and convenient.

[0027] As a preferred embodiment of the above embodiment, an identification nameplate 20 is provided on the outer wall of the outer tube 1. The identification nameplate 20 helps users quickly understand the basic information of the heat exchanger, facilitating subsequent installation, use, and maintenance. Through the serial number and other information on the identification nameplate, the production batch and quality records of the heat exchanger can be easily traced, which helps enterprises to manage product quality and provide after-sales service. At the same time, when multiple heat exchangers coexist, the identification nameplate also helps to distinguish and identify different equipment, facilitating management and maintenance. The safety warning information on the identification nameplate can remind users to pay attention to safety issues during use and maintenance, which helps to reduce the probability of safety accidents and ensure the safety of personnel and equipment.

[0028] As a preferred embodiment of the above, the waste discharge pipe 15 and the outer pipe 1 are fastened together by brazing. Brazing is a welding method that uses a low-melting-point filler metal to fill the joint gap and diffuse with the base material to achieve a connection. Since the filler metal can form a strong intermetallic bond after solidification, the brazed connection has high strength and can ensure that the connection between the waste discharge pipe 15 and the outer pipe 1 remains stable and reliable under long-term operation and various working conditions. During the brazing process, the filler metal completely fills and seals the joint gap, forming a dense metal layer, thereby effectively preventing fluid leakage. Therefore, the brazed connection provides a reliable sealing guarantee between the waste discharge pipe 15 and the outer pipe 1.

[0029] This utility model discloses a brazed double-layer tube heat exchanger. During operation, the sealing plug 16 on the waste pipe 15 is closed to ensure system sealing. A first fluid is introduced into two sets of chambers within the distribution shroud 2 through the first fluid inlet 5 and the first fluid outlet 6. Simultaneously, a second fluid is introduced into the heat exchange chamber of the outer tube 1 through the second fluid inlet 8. The first fluid is divided into two independent flows by the partition 4 within the distribution shroud 2, each entering the inlet of the inner heat exchange tube 7. The first fluid in the inner heat exchange tube 7 exchanges heat with the second fluid passing through the heat exchange chamber of the outer tube 1. Since the inlet and outlet of the inner heat exchange tube 7 are located on the upper and lower sides of the partition 4, respectively... The fluid forms convection inside the tube, enhancing the heat exchange effect. After heat exchange, the first fluid flows out from the outlet of the inner heat exchange tube 7, passes through the chamber in the diversion shroud 2, and is finally discharged from the first fluid outlet 6. At the same time, the second fluid is heated or cooled in the heat exchange chamber of the outer tube 1 and then discharged from the second fluid outlet 9, completing the heat exchange process. The internal temperature of the outer tube 1 is monitored in real time by the temperature probe 14 to ensure that the heat exchanger operates within a suitable temperature range. The waste discharge pipe 15 is checked regularly, and the sealing plug 16 is opened when necessary to discharge impurities or waste liquid, keeping the inside of the heat exchanger clean. All connecting parts are checked and tightened regularly to ensure the stability and sealing of the heat exchanger structure.

[0030] The present invention relates to a brazed double-layer tube heat exchanger, the installation method, connection method, or setting method of which are all common mechanical methods. As long as the beneficial effect can be achieved, it can be implemented.

[0031] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A brazed double-layer tube heat exchanger, characterized in that, It includes an outer tube, a flow divider, a baffle, a partition, and a heat exchange inner tube. A baffle is provided between the outer tube and the flow divider. The outer tube, the flow divider, and the baffle are fastened together. The partition is fixedly installed on the baffle. The partition divides the interior of the flow divider into two sets of chambers. Several sets of heat exchange inner tubes are connected on the baffle. The liquid inlet of each set of heat exchange inner tubes is located on the upper side of the partition, and the liquid outlet of the heat exchange inner tubes is located on the lower side of the partition.

2. The brazed double-layer tube heat exchanger as described in claim 1, characterized in that, Several sets of reinforcing hanging plates are arranged on the upper side inside the outer tube. The reinforcing hanging plates are fastened to the inner wall of the outer tube. Upper reinforcing rods are inserted through the reinforcing hanging plates and are fastened to the baffles. Several sets of reinforcing support plates are arranged on the lower side inside the outer tube. The reinforcing hanging plates are fastened to the inner wall of the outer tube. Lower reinforcing rods are inserted through the reinforcing support plates and are fastened to the baffles.

3. A brazed double-layer tube heat exchanger as described in claim 2, characterized in that, Temperature probes are interspersed on the reinforced support plate to test the internal temperature of the outer tube.

4. The brazed double-layer tube heat exchanger as described in claim 1, characterized in that, The bottom end of the outer tube is connected to a waste discharge pipe, and the waste discharge pipe is fitted with a sealing plug on a sealing cap.

5. A brazed double-layer tube heat exchanger as described in claim 1, characterized in that, The bottom end of the outer tube is provided with two sets of arc-shaped support plates, and each set of arc-shaped support plates is provided with a support frame.

6. A brazed double-layer tube heat exchanger as described in claim 1, characterized in that, The top of the outer tube is equipped with two sets of lifting lugs.

7. A brazed double-layer tube heat exchanger as described in claim 1, characterized in that, A nameplate is provided on the outer wall of the outer tube.

8. A brazed double-layer tube heat exchanger as described in claim 4, characterized in that, The waste discharge pipe and the outer pipe are fastened together by brazing.

Images