A U-tube heat exchanger

Abstract

This utility model provides a U-shaped tube heat exchanger, relating to the field of heat exchanger technology. The utility model includes a heat exchange module comprising an inlet chamber, a first heat exchange chamber, and a second heat exchange chamber. The inlet chamber, the first heat exchange chamber, and the second heat exchange chamber are assembled together by flanges to form a complete closed tank-like container. Flow channels are provided inside the first and second heat exchange chambers. When cleaning the surface of the copper tubes, the flange bolts between the first and second heat exchange chambers can be unscrewed, and a high-pressure water gun can be used to directly rinse the surface of the copper tubes. The valve of the rinsing port can then be opened, and the high-pressure water gun can be used to rinse along the rinsing port, ensuring that water carrying impurities flows away through the gaps between the flanges of the first and second heat exchange chambers. Simultaneously, the inlet chamber can be disassembled, allowing the high-pressure water gun to rinse the inside of each copper tube to remove impurities.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, and in particular to a U-tube heat exchanger. Background Technology

[0002] U-tube heat exchangers, as highly efficient heat exchange devices, are widely used in chemical, refrigeration, and energy fields. Their core principle is the indirect contact between two fluids at different temperatures (the liquid to be heated and the coolant) within a closed cavity, achieving heat transfer and exchange. Existing U-tube heat exchangers typically consist of a heat exchange chamber, U-shaped heat exchange tubes, coolant inlet and outlet, and the liquid to be heated inlet and outlet. The liquid to be heated flows inside the U-shaped tubes, while the coolant flows around the U-shaped tubes within the heat exchange chamber, completing heat exchange through the tube walls.

[0003] However, existing technologies have the following problems in practical applications: after long-term use, dirt (such as scale and impurities) easily adheres to the surface of the U-tube, and the tube may also be blocked due to the deposition of impurities in the liquid to be exchanged, which affects the heat exchange effect. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a U-tube heat exchanger.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a U-shaped tube heat exchanger, comprising a heat exchange module, wherein the heat exchange module includes a liquid inlet chamber, a first heat exchange chamber, and a second heat exchange chamber, wherein the liquid inlet chamber, the first heat exchange chamber, and the second heat exchange chamber are assembled together by means of flanges to form a complete closed tank-like container, wherein the first heat exchange chamber and the second heat exchange chamber are provided with flow channels, wherein the liquid to be heated flows inside the flow channels, and the coolant liquid flows inside the first heat exchange chamber and the second heat exchange chamber and exchanges heat with the liquid to be heated inside the flow channels.

[0006] Preferably, the assembly ports of the first and second heat exchange chambers are sealed by an installation plate. The flow channel is a copper tube with a U-shaped structure. The liquid inlet chamber is equipped with a partition, which divides the liquid inlet chamber into upper and lower cavities. The liquid to be exchanged enters the copper tube from the upper cavity of the liquid inlet chamber and then flows into the lower cavity of the liquid inlet chamber along the copper tube.

[0007] The effect achieved by the above components is as follows: the upper end of the liquid inlet chamber is connected to the liquid inlet, and the lower end of the liquid inlet chamber is connected to the liquid outlet. The liquid to be heat exchanged enters the upper region of the liquid inlet chamber from the liquid inlet and enters the copper tube. The liquid to be heat exchanged exchanges heat with the coolant inside the first heat exchange chamber and the second heat exchange chamber in the copper tube. Then it flows from the copper tube channel to the lower region of the liquid inlet chamber and is discharged from the liquid outlet. The U-shaped copper tube can increase the flow time of the liquid to be heat exchanged, thereby increasing the heat exchange time and improving the heat exchange effect.

[0008] Preferably, an assembly frame is fixedly connected to the surface of the copper tube, wherein the edge of the assembly frame slides horizontally in the internal cavity of the cylindrical structure formed by the first heat exchange chamber and the second heat exchange chamber, a gap is provided between the port of the assembly frame and the second heat exchange chamber, and the remaining part of the assembly frame divides the first heat exchange chamber and the second heat exchange chamber into upper and lower regions.

[0009] The aforementioned components achieve the following effects: the mounting bracket provides support for the copper tube, fixing it inside the first and second heat exchange chambers to prevent damage from collisions. Simultaneously, the mounting bracket separates the two sides of the U-shaped copper tube. Coolant enters the first heat exchange chamber through the coolant inlet. Due to the mounting bracket, the coolant flows along the side of the first heat exchange chamber to the second heat exchange chamber, then from the edge of the second heat exchange chamber to below the mounting bracket, and finally flows back to the first heat exchange chamber and exits through the coolant outlet. The mounting bracket increases the residence time of the coolant within the heat exchange chambers (first and second heat exchange chambers), thereby ensuring sufficient contact between the coolant and the copper tube to improve heat exchange efficiency.

[0010] Preferably, a buffer component is uniformly and fixedly connected to the surface of the copper tube, and the buffer component increases the length of the coolant flow path.

[0011] Preferably, the buffer component is an isolation plate, and multiple isolation plates are arranged vertically and staggered from left to right on the copper tube.

[0012] The effect achieved by the above components is that the arrangement of multiple baffles allows the coolant to flow in a fluctuating up-and-down pattern, further extending the coolant residence time and ensuring that the coolant can fully contact the copper pipe to improve heat exchange efficiency.

[0013] Preferably, the upper end of the first heat exchange chamber is connected to a coolant inlet, the lower end of the first heat exchange chamber is provided with a coolant outlet, and both the first and second heat exchange chambers are provided with hanging plates with circular holes.

[0014] The effect achieved by the above components is that during hoisting, the crane hook can be hooked into the circular hole of the hoisting plate, thereby using the crane to lift the entire equipment.

[0015] Preferably, the side of the second heat exchange chamber is connected to a flushing port, and the flushing port is connected to a valve.

[0016] The above-mentioned components achieve the following effects: when it is necessary to clean the surface of the copper tube, the flange bolts between the first heat exchange chamber and the second heat exchange chamber can be unscrewed, and then the surface of the copper tube can be directly rinsed with a high-pressure water gun. Then, the valve of the rinsing port can be opened and the high-pressure water gun can be used to rinse along the rinsing port to ensure that the water carrying the impurities flows away from the gaps where the flanges of the first heat exchange chamber and the second heat exchange chamber are separated. At the same time, the liquid inlet chamber can also be disassembled so that the high-pressure water gun can rinse the impurities inside the copper tube one by one.

[0017] Preferably, the bottom ends of the first heat exchange chamber and the second heat exchange chamber are both fixedly connected to a base. An adjustment component is installed at the lower end of the base. The adjustment component includes a track. The track and the base are slidably connected by a slide block. A horizontal rail is fixedly connected to the bottom of the track. A lead screw is provided at the upper end of the horizontal rail. Two lead screws are threadedly connected to the base. The lead screws are rotatably mounted on the horizontal rail by means of a bearing seat. A turntable is fixedly connected to the end of the lead screw.

[0018] The effect achieved by the above components is as follows: the surface of the horizontal rail is equipped with a bracket by means of bolts, wherein the other end of the bracket is used to support the first heat exchange chamber or the second heat exchange chamber. First, the flange bolts between the first heat exchange chamber and the second heat exchange chamber are removed, and then the two turntables are turned respectively, so that the screw rotates under the two bases, driving the two bases to slide horizontally on the surface of the rail by means of the slide, thereby separating the first heat exchange chamber and the second heat exchange chamber for easy maintenance and cleaning. When the first heat exchange chamber and the second heat exchange chamber are assembled together, the bracket is installed on the horizontal rail by bolts, and the bracket is used to support the first heat exchange chamber and the second heat exchange chamber to reduce the stress on the base and ensure stability.

[0019] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0020] In this invention, in the fields of chemical engineering and refrigeration, when the liquid to be exchanged (such as high-temperature process fluid) and the coolant (such as cooling water) flow through the above-mentioned path, the design of extending the contact time with the help of the U-shaped tube, strengthening the coolant disturbance with the isolation plate, and the detachable structure for easy cleaning can not only complete the heat exchange efficiently, but also avoid the problem of heat exchange efficiency reduction caused by dirt blockage after long-term use, thus significantly improving the stability and service life of the equipment. Attached Figure Description

[0021] Figure 1 This utility model provides a three-dimensional structural diagram of a U-shaped tube heat exchanger;

[0022] Figure 2 This utility model provides a schematic diagram of the flushing state of a U-tube heat exchanger.

[0023] Figure 3 This invention provides a schematic diagram of the coolant flow path in a U-shaped tube heat exchanger.

[0024] Figure 4 A schematic diagram of a partition plate in a U-shaped tube heat exchanger is provided for this utility model;

[0025] Figure 5 This utility model proposes a U-shaped tube heat exchanger. Figure 1 Enlarged view of point A.

[0026] Legend: 1. Heat exchange module; 11. Liquid inlet chamber; 12. First heat exchange chamber; 13. Second heat exchange chamber; 14. Liquid inlet; 15. Coolant inlet; 16. Liquid outlet; 17. Coolant outlet; 18. Copper pipe; 19. Buffer component; 110. Baffle; 111. Mounting plate; 112. Assembly rack; 2. Flushing port; 3. Base; 4. Bracket; 5. Lead screw; 6. Rail; 7. Horizontal rail; 8. Slide; 9. Turntable. Detailed Implementation

[0027] Example 1, as Figure 1-5 As shown, a U-tube heat exchanger includes a heat exchange module 1, which includes an inlet chamber 11, a first heat exchange chamber 12, and a second heat exchange chamber 13. The inlet chamber 11, the first heat exchange chamber 12, and the second heat exchange chamber 13 are assembled into a complete closed tank-like container by means of flanges. The first heat exchange chamber 12 and the second heat exchange chamber 13 are provided with flow channels, in which the liquid to be heated flows. The coolant liquid flows in the first heat exchange chamber 12 and the second heat exchange chamber 13 and exchanges heat with the liquid to be heated in the flow channels.

[0028] The first heat exchange chamber 12 and the second heat exchange chamber 13 are assembled with the port sealed. The flow channel is a copper tube 18, which has a U-shaped structure. The liquid inlet chamber 11 is equipped with a partition 110, which divides the liquid inlet chamber 11 into upper and lower cavities. The liquid to be exchanged enters the copper tube 18 from the upper cavity of the liquid inlet chamber 11 and then flows into the lower cavity of the liquid inlet chamber 11 along the copper tube 18. The upper end of the liquid inlet chamber 11 is connected to the liquid inlet port 14, and the lower end of the liquid inlet chamber 11 is connected to the liquid outlet port 16. The liquid to be heat exchanged enters the upper region of the liquid inlet chamber 11 through the liquid inlet port 14 and enters the copper tube 18. The liquid to be heat exchanged exchanges heat with the coolant inside the first heat exchange chamber 12 and the second heat exchange chamber 13 in the copper tube 18, and then flows from the copper tube 18 to the lower region of the liquid inlet chamber 11 and is discharged from the liquid outlet port 16. The U-shaped copper tube 18 can increase the flow time of the liquid to be heat exchanged, thereby increasing the heat exchange time and improving the heat exchange effect. The surface of the copper tube 18 is fixedly connected to the mounting bracket 112. The edge of the mounting bracket 112 slides horizontally in the internal cavity of the cylindrical structure formed by the first heat exchange chamber 12 and the second heat exchange chamber 13. A gap is provided between the port of the mounting bracket 112 and the second heat exchange chamber 13. The rest of the mounting bracket 112 divides the first heat exchange chamber 12 and the second heat exchange chamber 13 into upper and lower regions. The mounting bracket 112 provides support for the copper tube 18, fixing it inside the first heat exchange chamber 12 and the second heat exchange chamber 13 to prevent damage from collisions. Simultaneously, the mounting bracket 112 separates the two sides of the U-shaped copper tube 18. Coolant enters the first heat exchange chamber 12 through the coolant inlet 15. The mounting bracket 112 allows the coolant to flow along the side of the first heat exchange chamber 12 to the second heat exchange chamber 13, then from the edge of the second heat exchange chamber 13 to below the mounting bracket 112, and finally back to the first heat exchange chamber 12 and out through the coolant outlet 17. The mounting bracket 112 increases the residence time of the coolant within the heat exchange chambers (first heat exchange chamber 12 and second heat exchange chamber 13), ensuring sufficient contact between the coolant and the copper tube 18 to improve heat exchange efficiency.

[0029] A buffer member 19 is uniformly fixedly connected to the surface of the copper tube 18. The buffer member 19 increases the length of the coolant flow path. The buffer member 19 is an isolation plate, and multiple isolation plates are arranged vertically and staggered from left to right on the copper tube 18. The arrangement of multiple isolation plates allows the coolant flow path to be a back-and-forth undulating pattern, further extending the coolant residence time, thereby ensuring that the coolant can fully contact the copper tube 18 to improve heat exchange efficiency. The upper end of the first heat exchange chamber 12 is connected to a coolant inlet 15, and a coolant outlet 17 is provided at the bottom of the first heat exchange chamber 12. Both the first heat exchange chamber 12 and the second heat exchange chamber 13 are provided with hanging plates at their upper ends, and circular holes are opened on the hanging plates. During hoisting, the crane hook can be hooked into the circular holes of the hanging plates, and the entire equipment can be lifted by the crane.

[0030] The side of the second heat exchange chamber 13 is connected to a flushing port 2, and the port of flushing port 2 is connected to a valve. When it is necessary to clean the surface of the copper tube 18, the flange bolts between the first heat exchange chamber 12 and the second heat exchange chamber 13 can be unscrewed, and then the surface of the copper tube 18 can be directly flushed with a high-pressure water gun. Then, the valve of flushing port 2 can be opened, and the high-pressure water gun can be used to flush along flushing port 2 to ensure that the water carrying impurities flows away from the gaps where the flanges of the first heat exchange chamber 12 and the second heat exchange chamber 13 are separated. At the same time, the liquid inlet chamber 11 can also be disassembled so that the high-pressure water gun can be used to flush the impurities inside the copper tube 18 one by one. The bottom of the first heat exchange chamber 12 and the second heat exchange chamber 13 are both fixedly connected to a base 3. The lower end of the base 3 is equipped with an adjusting component, which includes a rail 6. The rail 6 and the base 3 are slidably connected by a sliding block 8. The bottom of the rail 6 is fixedly connected to a horizontal rail 7, and the upper end of the horizontal rail 7 is... Two lead screws 5 are provided, each threadedly connected to a base 3. The lead screws 5 are rotatably mounted on a horizontal rail 7 via bearing seats. A turntable 9 is fixedly connected to the end of the lead screw 5. A bracket 4 is bolted to the surface of the horizontal rail 7. The other end of the bracket 4 is used to support the first heat exchange chamber 12 or the second heat exchange chamber 13. First, the flange bolts between the first heat exchange chamber 12 and the second heat exchange chamber 13 are removed. Then, the two turntables 9 are turned respectively, allowing the lead screws 5 to rotate threadedly under the two bases 3. This causes the two bases 3 to slide horizontally on the surface of the rail 6 via a slide block 8, thereby separating the first heat exchange chamber 12 and the second heat exchange chamber 13 for easy maintenance and cleaning. When the first heat exchange chamber 12 and the second heat exchange chamber 13 are assembled together, the bracket 4 is bolted to the horizontal rail 7 and used to support the first heat exchange chamber 12 and the second heat exchange chamber 13, reducing the stress on the base 3 and ensuring stability.

[0031] Working principle: The heat exchanger consists of an inlet chamber 11, a first heat exchange chamber 12, and a second heat exchange chamber 13, assembled into a closed tank-like container via flanges. This forms independent flow channels for the liquid to be exchanged (U-shaped copper tube 18) and for the coolant (internal cavities of the heat exchange chambers). Heat transfer between the two fluids occurs through the walls of the copper tube 18. The inlet chamber 11 is divided into upper and lower independent cavities by a partition 110. The liquid to be exchanged enters the U-shaped copper tube 18 (flow channel) from the upper cavity of the inlet chamber 11. Due to the U-shape of the copper tube 18, the liquid undergoes a backflow within the tube and then flows into the lower cavity of the inlet chamber 11 from the other end of the copper tube 18, finally exiting from the outlet 16. The U-shaped structure extends the flow time of the liquid to be exchanged within the tube, ensuring a longer contact time for heat exchange with the external coolant and improving heat exchange efficiency. The coolant enters through the coolant inlet 15 at the upper end of the first heat exchange chamber 12. Divided by the mounting frame 112 (a support structure for fixing the copper tubes 18), which divides the interior of the first and second heat exchange chambers 13 into upper and lower regions with only gaps at the edges, the coolant first flows along the side of the first heat exchange chamber 12 to the second heat exchange chamber 13, then flows through the edge gaps into the area below the mounting frame 112, finally converging at the coolant outlet 17 below the first heat exchange chamber 12 for discharge. The buffer members 19 (staggered baffles) on the surface of the copper tubes 18 force the coolant flow path to become a "reciprocating up-and-down undulating" pattern, further extending the residence time of the coolant within the heat exchange chamber, ensuring full contact with the surface of the copper tubes 18, and maximizing heat exchange efficiency.

[0032] After prolonged use, dirt may easily accumulate on the surface of the copper tube 18, and impurities may deposit inside the tube. In this case, it can be cleaned in the following ways: remove the flange between the first and second heat exchange chambers 13 to expose the copper tube 18; use a high-pressure water gun to directly rinse the surface of the copper tube 18, and at the same time open the flushing port 2 valve on the side of the second heat exchange chamber 13 to allow the wastewater carrying dirt to be discharged from the flange gap and the flushing port 2; if the tube is blocked, the liquid inlet chamber 11 can be removed to rinse the inside of the U-shaped copper tube 18 one by one to thoroughly remove impurities.

[0033] The base 3 at the bottom of the first and second heat exchange chambers 13 can be adjusted in position by adjusting components (rail 6, lead screw 5, turntable 9, etc.): rotating the turntable 9 drives the lead screw 5 to rotate, which allows the base 3 to slide horizontally along the rail 6, thereby separating or merging the first and second heat exchange chambers 13, which facilitates disassembly and assembly during maintenance; in the assembled state, the bracket 4 on the horizontal rail 7 can assist in supporting the heat exchange chamber, reduce the stress on the base 3, and ensure the stability of the equipment.

[0034] In the fields of chemical engineering and refrigeration, when the liquid to be exchanged (such as high-temperature process fluid) and the coolant (such as cooling water) flow through the above-mentioned path, the design of extending the contact time with the help of U-shaped tubes, strengthening the coolant disturbance with the isolation plate, and the detachable structure for easy cleaning can not only complete the heat exchange efficiently, but also avoid the problem of heat exchange efficiency decline due to dirt blockage after long-term use, thus significantly improving the stability and service life of the equipment.

[0035] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may use the disclosed technical content to make changes or modifications to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the scope of the utility model's technical solution, still fall within the protection scope of this utility model's technical solution. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through specific circumstances.

Claims

1. A U-tube heat exchanger, comprising a heat exchange module (1), characterized in that: The heat exchange module (1) includes an inlet chamber (11), a first heat exchange chamber (12), and a second heat exchange chamber (13). The inlet chamber (11), the first heat exchange chamber (12), and the second heat exchange chamber (13) are assembled into a complete closed tank-like container by means of flanges. The first heat exchange chamber (12) and the second heat exchange chamber (13) are provided with flow channels, in which the liquid that needs to be heated flows inside the flow channels. The coolant liquid flows inside the first heat exchange chamber (12) and the second heat exchange chamber (13) and exchanges heat with the liquid that needs to be heated inside the flow channels.

2. The U-tube heat exchanger according to claim 1, characterized in that: The first heat exchange chamber (12) and the second heat exchange chamber (13) are sealed at the assembly state port by the mounting plate (111). The flow channel is a copper tube (18), which has a U-shaped structure. The liquid inlet chamber (11) is provided with a partition (110). The partition (110) divides the liquid inlet chamber (11) into upper and lower cavities. The liquid to be exchanged enters the copper tube (18) from the upper cavity of the liquid inlet chamber (11) and then flows into the lower cavity of the liquid inlet chamber (11) along the copper tube (18).

3. The U-tube heat exchanger according to claim 2, characterized in that: The surface of the copper tube (18) is fixedly connected to an assembly frame (112), wherein the edge of the assembly frame (112) slides horizontally in the internal cavity of the cylindrical structure formed by the first heat exchange chamber (12) and the second heat exchange chamber (13), a gap is provided between the port of the assembly frame (112) and the second heat exchange chamber (13), and the remaining part of the assembly frame (112) divides the first heat exchange chamber (12) and the second heat exchange chamber (13) into upper and lower regions.

4. The U-tube heat exchanger according to claim 3, characterized in that: The surface of the copper tube (18) is uniformly fixedly connected with a buffer member (19), which increases the length of the coolant flow path.

5. The U-tube heat exchanger according to claim 4, characterized in that: The buffer component (19) is an isolation plate, and multiple isolation plates are arranged vertically and staggered on the copper tube (18) from left to right.

6. The U-tube heat exchanger according to claim 5, characterized in that: The upper end of the first heat exchange chamber (12) is connected to a coolant inlet (15), and the lower part of the first heat exchange chamber (12) is provided with a coolant outlet (17).

7. The U-tube heat exchanger of claim 6, wherein: Both the first heat exchange chamber (12) and the second heat exchange chamber (13) are equipped with hanging plates at their upper ends, and circular holes are opened on the hanging plates.

8. The U-tube heat exchanger of claim 7, wherein: The side of the second heat exchange chamber (13) is connected to a flushing port (2), and the flushing port (2) is connected to a valve.

9. The U-tube heat exchanger of claim 8, wherein: The bottom ends of the first heat exchange chamber (12) and the second heat exchange chamber (13) are both fixedly connected to a base (3), and an adjustment component is installed at the lower end of the base (3).

10. The U-tube heat exchanger of claim 9, wherein: The adjusting component includes a track (6), which is slidably connected to the base (3) by means of a slide (8). A horizontal rail (7) is fixedly connected to the bottom of the track (6), and a lead screw (5) is provided at the upper end of the horizontal rail (7). The two lead screws (5) are threadedly connected to the base (3) respectively. The lead screw (5) is rotatably mounted on the horizontal rail (7) by means of a bearing seat. A turntable (9) is fixedly connected to the end of the lead screw (5).

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