High efficiency coil heat exchanger

Abstract

The application relates to the technical field of tubular heat exchangers, and discloses a high-efficiency disc tube heat exchanger which comprises a tank body, shell side medium flows through the tank body, tube sheets are fixedly installed on the inner walls of the two ends of the tank body, a first inlet and a first outlet are communicated on the outer circumferential surface of the tank body, and a plurality of heat exchange tubes are arranged through the tank body, the temperature of tube side medium after heat exchange is monitored in real time through a temperature sensor, when one-way flow causes the heat exchange temperature difference between the tail section of the heat exchange tube and the shell side medium to be reduced and a heat exchange dead angle to appear, the opening and closing states of the second inlet, the second outlet and the temperature sensor on the flanges of the two ends are synchronously switched, the flow direction of the tube side medium in the heat exchange tube is switched from left to right to right to left, the original tail section is changed into a feed first section, each section of the heat exchange tube alternately undertakes a high-load heat exchange task, and the problems of reduced heat exchange temperature difference in the tail section and reduced heat exchange efficiency caused by long-term one-way flow of a conventional disc tube heat exchanger are avoided.

Description

Technical Field

[0001] This invention relates to the field of tubular heat exchanger technology, and more specifically to a high-efficiency coil heat exchanger. Background Technology

[0002] Generally speaking, coil heat exchangers are a type of heat exchange equipment widely used in chemical, HVAC, food processing, and energy heat exchange fields. During the heat exchange process, the heat transfer between the internal and external media is achieved by relying on the coil wall to complete the heating or cooling of the liquid, water, and other media in the tank. Conventional coil heat exchangers mainly install the heat exchange coil inside a sealed tank, so that the coil is completely immersed in the medium to be exchanged in the tank. By passing heat exchange media such as steam, hot water, or low-temperature refrigerant into the coil, the medium inside the coil and the medium outside the tank can exchange heat through the tube wall. In the continuous operation of existing coil-type heat exchangers, taking the heat exchanger heat exchange condition as an example, the high-temperature heat medium enters the tube body from the feed end of the coil. In the initial stage, the heat medium temperature is the highest, forming a large temperature difference with the low-temperature medium in the tank, which can achieve efficient and rapid heat exchange. However, as the heat medium continues to flow along the coil pipeline towards the discharge end, heat is continuously transferred to the medium in the tank through the tube wall, and the temperature of the heat medium itself will continue to decrease. When the heat medium flows to the tail end of the coil outlet pipeline, the remaining temperature of the heat medium has dropped significantly, and the heat exchange temperature difference with the medium in the tank has decreased significantly, resulting in a significant decrease in the heat exchange capacity of the tail end of the coil, and uneven heat exchange efficiency between the beginning and end of the coil. The problem is that the front section of the coil feeds in this situation maintains a high-efficiency heat exchange state, while the tail section is in a low-efficiency heat exchange state for a long time. This not only results in insufficient overall heat exchange utilization of the coil and difficulty in improving the overall heat exchange efficiency of the equipment, but also creates heat exchange dead zones, leading to uneven temperature distribution of the medium inside the tank. At the same time, the long-term differential operation of heat exchange efficiency between the front and tail sections will cause the tail section of the coil to be in a low temperature difference heat exchange state for a long time, which will not be able to fully play its heat exchange role. Based on this, the present invention aims to provide a high-efficiency coil heat exchanger that can balance the temperature difference of heat exchange throughout the coil, eliminate the problem of low heat exchange efficiency in the tail section, and improve the overall heat exchange uniformity and operating efficiency. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a high-efficiency coil heat exchanger to solve the technical problems in the prior art.

[0004] The objective of this invention can be achieved through the following technical solutions: A high-efficiency coil heat exchanger includes: A tank body contains a shell-side medium flowing through it. Tube sheets are fixedly installed on the inner walls of both ends of the tank body. A first inlet and a first outlet are connected to the outer circular surface of the tank body. Multiple heat exchange tubes are arranged throughout the tank body, with each end of the heat exchange tube connected to two tube sheets. Tube-side medium flows through the heat exchange tubes. Each tank body has mounting brackets at both ends, and flange tubes are fixedly installed at both ends of the tank body via flanges. A temperature sensor is installed inside each flange tube. The flange tube is connected to the heat exchange tubes via tube sheets. The temperature sensor is used to monitor the temperature of the tube-side medium flowing through the flange tube. A second inlet and a second outlet are connected to the outer circular surface of each flange tube. The second inlet and second outlet on each flange tube open and close asynchronously. The second inlet on one flange tube opens and closes asynchronously with the second inlet on another flange tube. The temperature sensor inside each flange tube opens and closes synchronously with the corresponding second outlet. The shell-side medium flows sequentially through the first inlet, the tank body, and the first outlet. The tube-side medium flows sequentially through the second inlet on one flange tube, one flange tube, a heat exchange tube, another flange tube, and the second outlet on another flange tube.

[0005] As a further aspect of the present invention: a plurality of baffles arranged at equal intervals are fixedly installed on the inner wall of the tank, and the heat exchange tubes inside the tank pass through the baffles, with adjacent baffles arranged in a staggered manner.

[0006] As a further aspect of the present invention: an inner tube is fixedly installed on the side of each tube sheet facing the flange tube, the inner tube is connected to a portion of the heat exchange tubes through the tube sheet, an insert tube is slidably inserted into each flange tube, one end of the insert tube is fixedly installed with a three-way valve through the flange, each three-way valve has a corresponding flange tube, each three-way valve is connected to a third inlet and a third outlet, the third inlet and the third outlet are asynchronously opened and closed with the corresponding second inlet and second outlet, each mounting bracket is provided with a driving assembly, the insert tube and the three-way valve are driven to move by the driving assembly, when the driving assembly drives the insert tube and the three-way valve to approach the flange tube, one end of the insert tube is connected to the inner tube.

[0007] As a further aspect of the present invention: the inlet end of the inner tube is provided with a tapered hole, and the outer circular surface of the docking end of the insertion tube and the inner tube is provided with a tapered surface, and both the tapered hole and the tapered surface are necking structures.

[0008] As a further aspect of the present invention: the drive assembly includes an electric cylinder and a pipe seat, each of the mounting brackets is fixedly mounted with an electric cylinder, the movable end of the electric cylinder is fixedly mounted with a pipe seat, and the three-way valve is fixedly mounted on the pipe seat.

[0009] As a further aspect of the present invention: a gate valve is provided on the insertion tube, the insertion tube is connected to a three-way valve through the gate valve, a valve plate and a valve stem are slidably installed inside the gate valve, the valve stem is coaxially and fixedly connected to the valve plate, the top end of the valve stem extends above the gate valve, and the valve stem is driven to rise and fall by the output component. When one end of the insertion tube is connected to the inner tube, the output component drives the valve stem to rise and fall.

[0010] As a further embodiment of the present invention: the output component includes a limiting plate, an electric telescopic rod, a lifting plate, a tension spring, and a horizontal plate. The horizontal plate is fixedly installed on the top of the valve stem. The horizontal plate is connected to the top of the gate valve through the tension spring. The preload of the tension spring causes the horizontal plate to descend. The limiting plate is fixedly installed on the mounting bracket. The electric telescopic rod is fixedly installed on the limiting plate. The lifting plate is fixedly installed on the movable end of the electric telescopic rod. In the initial state, the horizontal height of the lifting plate is lower than that of the horizontal plate. When the drive component drives the insertion tube and the three-way valve to move so that one end of the insertion tube is connected to the inner tube, the horizontal plate moves above the lifting plate.

[0011] As a further aspect of the present invention: two symmetrically arranged extension plates are fixedly installed on one side of each lifting plate. When the horizontal plate moves above the lifting plate, the valve stem and tension spring are located between the two extension plates, and the extension plates are located below the horizontal plate. When the electric telescopic rod drives the lifting plate to rise, the horizontal plate rises synchronously, and the side of the horizontal plate facing the three-way valve slides in cooperation with the limiting plate.

[0012] The beneficial effects of this invention are: 1. In this invention, the temperature of the tube-side medium after heat exchange is monitored in real time by a temperature sensor. When unidirectional flow causes the temperature difference between the tail end of the heat exchange tube and the shell-side medium to shrink and a heat exchange dead zone to appear, the opening and closing states of the second inlet, the second outlet and the temperature sensor on the flange tubes at both ends are switched simultaneously. This changes the flow direction of the tube-side medium in the heat exchange tube from left to right to right to left, turning the original tail section into the first feeding section. This allows each section of the heat exchange tube to take turns undertaking high-load heat exchange tasks, avoiding the problem of shrinking heat exchange temperature difference and reduced heat exchange efficiency in the tail section caused by long-term unidirectional flow in conventional coil heat exchangers. This achieves a balanced utilization of the heat exchange capacity of the entire heat exchange tube, eliminates heat exchange dead zones, and ensures a uniform temperature field of the shell-side medium inside the tank. 2. In this invention, the shell-side medium flows in a tortuous manner around the baffles inside the tank by means of baffles arranged at equal intervals and staggered positions, which slows down the flow velocity, prolongs the heat exchange time and increases the contact area. At the same time, in conjunction with the inner tube connected to the tube sheet, the insert tube slidably inserted into the flange tube and the three-way valve, the conical surface of the insert tube end is driven by an electric cylinder to connect with the conical hole of the inner tube, so that part of the heat exchange tube is connected to the flange tube and the other part of the heat exchange tube is connected to the inner tube, so that the tube-side medium in the two parts of the heat exchange tube flows in opposite directions. Thus, heat exchange tubes in the initial stage of feeding are formed at both ends of the tank at the same time, avoiding the problem of long-term inefficiency in the tail section when flowing in one direction, so that both ends maintain a large heat exchange temperature difference and further improve the overall heat exchange efficiency. 3. In this invention, by setting a gate valve on the insertion tube and using the preload of the tension spring to keep the horizontal plate, valve stem, and valve plate lowered and the gate valve closed when the insertion tube is separated from the inner tube, the gate valve can only be opened by the electric telescopic rod driving the lifting plate to rise after the insertion tube and the inner tube are connected and the horizontal plate has moved above the lifting plate and the extension plate. At the same time, the horizontal plate slides against the limiting plate to prevent the insertion tube and the inner tube from being directly separated when the gate valve is open. This avoids the risk of leakage caused by the medium in the flange tube flowing through the insertion tube into the three-way valve at the moment of separation between the insertion tube and the inner tube, and ensures the safety and sealing of the entire process of connection and separation between the insertion tube and the inner tube. Attached Figure Description

[0013] The invention will now be further described with reference to the accompanying drawings.

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional structural diagram of the tank body and flange pipe in this invention; Figure 3 In this invention Figure 1 Enlarged structural diagram of section A; Figure 4 In this invention Figure 2 Enlarged structural diagram of section B; Figure 5 This is a schematic diagram of the structure of the insertion tube into the flange tube in this invention; Figure 6 This is a schematic diagram of the structure in this invention where the lifting plate drives the horizontal plate to rise; Figure 7 This is a schematic diagram of the inner tube structure in this invention.

[0015] In the diagram: 1. Tank body; 101. First inlet; 102. First outlet; 103. Heat exchange tube; 104. Tube sheet; 105. Baffle plate; 2. Flange tube; 201. Second inlet; 202. Second outlet; 3. Inner tube; 301. Tapered orifice; 4. Insert tube; 401. Tapered surface; 5. Mounting bracket; 6. Electric cylinder; 7. Tube seat; 8. Three-way valve; 801. Third inlet; 802. Third outlet; 9. Gate valve; 901. Valve plate; 902. Valve stem; 903. Tension spring; 904. Horizontal plate; 10. Limiting plate; 11. Electric telescopic rod; 12. Lifting plate; 1201. Extension plate. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Please see Figures 1-7 As shown, the present invention is a high-efficiency coil heat exchanger, comprising: Tank 1, through which shell-side medium flows, has tube sheets 104 fixedly installed on the inner walls of both ends. A first inlet 101 and a first outlet 102 are connected to the outer circumference of the tank 1. Multiple heat exchange tubes 103 are arranged through the tank 1, with each end of a heat exchange tube 103 connected to two tube sheets 104 respectively. Tube-side medium flows within the heat exchange tubes 103. Each end of the tank 1 is equipped with a mounting bracket 5. Flange tubes 2 are fixedly installed at both ends of the tank 1 via flanges. Each flange tube 2 contains a temperature sensor. The flange tube 2 is connected to the heat exchange tube 103 via the tube sheet 104. The temperature sensors are used to monitor the flow of medium within the flange tube 2. The temperature of the shell-side medium is controlled by a second inlet 201 and a second outlet 202 connected to the outer circumference of each flange tube 2. The second inlet 201 and the second outlet 202 on each flange tube 2 are opened and closed asynchronously. The second inlet 201 on one flange tube 2 is opened and closed asynchronously with the second inlet 201 on another flange tube 2. The temperature sensor in each flange tube 2 is opened and closed synchronously with the corresponding second outlet 202. The shell-side medium flows sequentially through the first inlet 101, the tank 1 and the first outlet 102. The tube-side medium flows sequentially through the second inlet 201 on one flange tube 2, one flange tube 2, the heat exchange tube 103, another flange tube 2 and the second outlet 202 on the other flange tube 2.

[0018] In one embodiment of this invention, it should be noted that the temperature sensor described in this invention is prior art, and this invention does not improve upon it. Therefore, it is not necessary to disclose its specific mechanical and circuit structures, and this does not affect the integrity of this invention.

[0019] The working principle of this invention: The tube-side medium flowing inside the heat exchange tube 103 is typically a heating or cooling medium such as steam, hot water, heat transfer oil, or cooling water. The shell-side medium flowing inside the tank 1 is typically a heated or cooled material such as water or liquid. Both are heat exchange media, and heat exchange is achieved through the tube wall of the heat exchange tube 103. The shell-side medium flows sequentially through the first inlet 101, the tank 1, and the first outlet 102. The tube-side medium flows sequentially through the second inlet 201 on a flange 2, the flange 2, the heat exchange tube 103, another flange 2, and the second outlet 202 on another flange 2. Specifically, the shell-side medium is first injected into the tank 1 through the first inlet 101. As the shell-side medium flows towards the first outlet 102 within the tank 1, it comes into contact with the heat exchange tube 103, exchanging heat with the tube-side medium through the tube wall of the heat exchange tube 103, and then is discharged from the first outlet 102. Figure 2 Taking the illustrated state as an example, when the second inlet 201 on the left flange pipe 2 is opened, the second outlet 202 on the left and its temperature sensor are both closed. Simultaneously, the second inlet 201 on the right flange pipe 2 is closed, while the second outlet 202 on the right and its temperature sensor are both open. At this time, the tube-side medium is injected through the left second inlet 201, flows sequentially through the left flange pipe 2 and each heat exchanger pipe 103, and then enters the right flange pipe 2. The flow direction is from left to right. During the transport of the tube-side medium within the heat exchanger pipe 103, it exchanges heat with the shell-side medium in the tank 1 via the pipe wall. The temperature of the tube-side medium after heat exchange is monitored by the right-side temperature sensor, and then discharged from the right second outlet 202. When the tube-side medium flows unidirectionally for a long period, the high-temperature heat medium... After entering from the inlet, the temperature continuously decreases along the pipeline, and the heat exchange temperature difference between the tail section of heat exchange tube 103 and the shell-side medium is significantly reduced, resulting in a decrease in heat exchange efficiency. The temperature sensor detects that the temperature change of the tube-side medium after heat exchange is small and the difference is not obvious, indicating that a heat exchange dead zone has appeared in the unidirectional flow tail section. At this time, the flow direction of the tube-side medium is switched, the second inlet 201 on the right flange tube 2 is opened, the corresponding second outlet 202 and temperature sensor are closed, and the second inlet 201 on the left flange tube 2 is closed, while the second outlet 202 and temperature sensor on the left are opened, so that the tube-side medium flows from right to left through the heat exchange tube 103, thereby turning the original tail section into the feed head section, restoring efficient heat exchange, eliminating heat exchange dead zones, and balancing the heat exchange temperature difference of each section of the heat exchange tube 103.

[0020] like Figures 1-2As shown, in a preferred embodiment of the present invention, a plurality of baffles 105 arranged at equal intervals are fixedly installed on the inner wall of the tank 1, and the heat exchange tubes 103 in the tank 1 pass through the baffles 105, with adjacent baffles 105 arranged in a staggered manner.

[0021] In practical application, the shell-side medium must bypass the baffle 105 when flowing in the tank 1. This slows down the flow velocity of the shell-side medium, prolonging the heat exchange time with the heat exchange tube 103. On the other hand, it changes the flow direction of the shell-side medium, forming a tortuous flow path that flows back and forth from top to bottom and from bottom to top. This causes the shell-side medium to repeatedly flow back and forth along the length of the heat exchange tube 103 through each section of the tube wall, increasing the contact area between the shell-side medium and the heat exchange tube 103 and improving the heat exchange efficiency. Combined with the periodic switching of the flow direction of the tube-side medium, this further alleviates the problems of uneven heat exchange at the beginning and end and inefficiency at the end.

[0022] like Figures 1-7 As shown, in a preferred embodiment of the present invention, an inner tube 3 is fixedly installed on the side of each tube sheet 104 facing the flange tube 2. The inner tube 3 is connected to a portion of the heat exchange tubes 103 through the tube sheet 104. An insert tube 4 is slidably inserted into each flange tube 2. A three-way valve 8 is fixedly installed at one end of the insert tube 4 through a flange. Each three-way valve 8 corresponds to a flange tube 2. Each three-way valve 8 is connected to a third inlet 801 and a third outlet 802. The third inlet 801 and the third outlet 802 are asynchronously opened and closed with the corresponding second inlet 201 and second outlet 202, respectively. A driving assembly is provided on each mounting bracket 5. The insert tube 4 and the three-way valve 8 are driven to move by the driving assembly. When the driving assembly drives the insert tube 4 and the three-way valve 8 to approach the flange tube 2, one end of the insert tube 4 is connected to the inner tube 3.

[0023] Specifically, the inner tube 3 has a tapered hole 301 at its inlet end, and the insertion tube 4 has a tapered surface 401 on its outer circular surface at the docking end with the inner tube 3. Both the tapered hole 301 and the tapered surface 401 are necked structures. Specifically, the drive assembly includes an electric cylinder 6 and a pipe seat 7. Each mounting bracket 5 is fixedly mounted with an electric cylinder 6, and the movable end of the electric cylinder 6 is fixedly mounted with a pipe seat 7. The three-way valve 8 is fixedly mounted on the pipe seat 7.

[0024] In one embodiment, it should be noted that the electric cylinder 6 described in this invention is prior art, and this invention does not improve upon it. Therefore, it is not necessary to disclose its specific mechanical and circuit structures, and this does not affect the integrity of this invention.

[0025] In practical application, this embodiment connects the inner tube 3 to the tube sheet 104. The electric cylinder 6 drives the tube seat 7 to drive the three-way valve 8 and the insertion tube 4 to approach the flange tube 2 simultaneously, so that the tapered surface 401 at the end of the insertion tube 4 is inserted into the tapered hole 301 of the inner tube 3. The metal sealing connection is achieved by relying on the constricted tapered structure of the two. Since the inner tube 3 is connected to a portion of the heat exchange tubes 103 through the tube sheet 104, and the third inlet 801 and third outlet 802 on the three-way valve 8 are asynchronously opened and closed with the corresponding second inlet 201 and second outlet 202, when the insert tube 4 is connected to the inner tube 3, a portion of the heat exchange tubes 103 remain connected to the flange tube 2, while the other portion of the heat exchange tubes 103 are connected to the inner tube 3. When the flow direction of the tube-side medium in the flange tube 2 is from left to right, the tube-side medium in the heat exchange tubes 103 connected to the inner tube 3 flows from right to left. This results in heat exchange tubes 103 at both ends of the tank 1 being in the initial feeding stage, and both ends can maintain a large heat exchange temperature difference, eliminating the problem of low heat exchange efficiency at the tail end when flowing in a single direction, and further improving the overall heat exchange efficiency.

[0026] like Figures 1-6 As shown, in a preferred embodiment of the present invention, a gate valve 9 is provided on the insertion tube 4. The insertion tube 4 is connected to a three-way valve 8 through the gate valve 9. A valve plate 901 and a valve stem 902 are slidably installed inside the gate valve 9. The valve stem 902 is coaxially and fixedly connected to the valve plate 901. The top end of the valve stem 902 extends above the gate valve 9. The valve stem 902 is driven to rise and fall by the output component. When one end of the insertion tube 4 is connected to the inner tube 3, the output component drives the valve stem 902 to rise and fall.

[0027] Specifically, the output component includes a limiting plate 10, an electric telescopic rod 11, a lifting plate 12, a tension spring 903, and a horizontal plate 904. The horizontal plate 904 is fixedly installed on the top of the valve stem 902. The horizontal plate 904 is connected to the top of the gate valve 9 via the tension spring 903. The preload of the tension spring 903 causes the horizontal plate 904 to descend. The limiting plate 10 is fixedly installed on the mounting bracket 5. The electric telescopic rod 11 is fixedly installed on the limiting plate 10. The lifting plate 12 is fixedly installed on the movable end of the electric telescopic rod 11. In the initial state, the horizontal height of the lifting plate 12 is lower than the horizontal height of the horizontal plate 904. When the drive component drives the insertion tube 4 and the three-way valve 8 to move so that one end of the insertion tube 4 is connected to the inner tube 3, the horizontal plate 904 moves above the lifting plate 12. Specifically, each of the lifting plates 12 has two symmetrically arranged extension plates 1201 fixedly installed on one side. When the horizontal plate 904 moves above the lifting plate 12, the valve stem 902 and the tension spring 903 are located between the two extension plates 1201, and the extension plates 1201 are located below the horizontal plate 904. When the electric telescopic rod 11 drives the lifting plate 12 to rise, the horizontal plate 904 rises synchronously, and the side of the horizontal plate 904 facing the three-way valve 8 slides in cooperation with the limiting plate 10.

[0028] In one aspect of this embodiment, it should be noted that the electric telescopic rod 11 described in this invention is prior art, and this invention does not improve upon it. Therefore, it is not necessary to disclose its specific mechanical and circuit structures, and this does not affect the integrity of this invention.

[0029] In practical application, this embodiment controls the opening and closing of the insertion tube 4 by setting a gate valve 9: when the insertion tube 4 is separated from the inner tube 3, under the pre-tightening force of the tension spring 903, the horizontal plate 904, valve stem 902 and valve plate 901 are in a descending state, the gate valve 9 is closed, the passage of the insertion tube 4 is cut off, and when the tube side medium flows in the flange tube 2, the tube side medium will not flow out from the insertion tube 4, but can enter the inner tube 3 through the tapered hole 301 of the inner tube 3, and then flow into all the heat exchange tubes 103; After the insertion tube 4 is connected to the inner tube 3, the horizontal plate 904 moves with the three-way valve 8 above the lifting plate 12 and the two extension plates 1201. At this time, the valve stem 902 and the tension spring 903 are located between the two extension plates 1201, allowing the electric telescopic rod 11 to drive the lifting plate 12 to rise. The extension plates 1201 then simultaneously drive the horizontal plate 904 to rise, which in turn drives the valve stem 902 and the valve plate 901 to rise and open the gate valve 9. This ensures that the gate valve 9 can only be opened when the insertion tube 4 is connected to the inner tube 3, allowing the tube-side medium to enter through the third inlet 801. The insert tube 4, inner tube 3 and part of the heat exchange tube 103 are inserted into the tube 4. At the same time, when the horizontal plate 904 rises, one side of it slides with the limiting plate 10 and is actually abutted by the limiting plate 10. If the drive assembly drives the three-way valve 8 to move and separate the insert tube 4 from the inner tube 3, the horizontal plate 904 will be blocked by the limiting plate 10 and cannot move. This restricts the direct separation of the insert tube 4 and the inner tube 3 when the insert tube 4 and the inner tube 3 are connected and the gate valve 9 is open. This prevents the tube-side medium filled in the flange tube 2 from being injected into the three-way valve 8 through the insert tube 4 and causing leakage. Therefore, only when the electric telescopic rod 11 drives the lifting plate 12 to descend and reset, causing the horizontal plate 904, valve stem 902 and valve plate 901 to descend, cut off the passage of the insertion tube 4 and close the gate valve 9, can the insertion tube 4 and the inner tube 3 be separated, ensuring the safety and sealing of the entire process of docking and separating the insertion tube 4 and the inner tube 3.

[0030] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A high-efficiency coil heat exchanger, characterized in that, include: A tank (1) contains a shell-side medium. Tube sheets (104) are fixedly installed on the inner walls of both ends of the tank (1). A first inlet (101) and a first outlet (102) are connected to the outer circular surface of the tank (1). Multiple heat exchange tubes (103) are arranged through the tank (1). The two ends of the heat exchange tubes (103) are respectively connected to two tube sheets (104). Tube-side medium flows through the heat exchange tubes (103). Each tank (1) has a mounting bracket (5) at both ends. Flange tubes (2) are fixedly installed at both ends of the tank (1) through flanges. A temperature sensor is installed in each flange tube (2). The flange tubes (2) are connected to the heat exchange tubes (103) through the tube sheets (104). The temperature sensors are used to monitor the flow of tube-side medium in the flange tubes (2). The temperature of the medium is such that each flange (2) has a second inlet (201) and a second outlet (202) connected to its outer circular surface. The second inlet (201) and the second outlet (202) on each flange (2) are opened and closed asynchronously. The second inlet (201) on one flange (2) is opened and closed asynchronously with the second inlet (201) on another flange (2). The temperature sensor in each flange (2) is opened and closed synchronously with the corresponding second outlet (202). The shell-side medium flows sequentially through the first inlet (101), the tank (1) and the first outlet (102). The tube-side medium flows sequentially through the second inlet (201) on one flange (2), one flange (2), the heat exchange tube (103), another flange (2) and the second outlet (202) on another flange (2).

2. The high-efficiency coil heat exchanger according to claim 1, characterized in that, The inner wall of the tank (1) is fixedly equipped with multiple baffles (105) arranged at equal intervals. The heat exchange tubes (103) inside the tank (1) pass through the baffles (105), and adjacent baffles (105) are arranged in a staggered manner.

3. The high-efficiency coil heat exchanger according to claim 1, characterized in that, Each tube sheet (104) has an inner tube (3) fixedly installed on the side facing the flange tube (2). The inner tube (3) is connected to a portion of the heat exchange tubes (103) through the tube sheet (104). Each flange tube (2) has a slidably inserted tube (4). One end of the tube (4) is fixedly installed with a three-way valve (8) through the flange. Each three-way valve (8) has a corresponding flange tube (2). Each three-way valve (8) is connected to a third inlet (801) and a third outlet (802). The third inlet (801) and the third outlet (802) are asynchronously opened and closed with the corresponding second inlet (201) and second outlet (202), respectively. Each mounting bracket (5) is provided with a drive assembly. The tube (4) and the three-way valve (8) are driven to move by the drive assembly. When the drive assembly drives the tube (4) and the three-way valve (8) to approach the flange tube (2), one end of the tube (4) is connected to the inner tube (3).

4. A high-efficiency coil heat exchanger according to claim 3, characterized in that, The inner tube (3) has a conical hole (301) at its inlet end, and the outer circular surface of the insertion tube (4) and the inner tube (3) has a conical surface (401). Both the conical hole (301) and the conical surface (401) are necked structures.

5. A high-efficiency coil heat exchanger according to claim 3, characterized in that, The drive assembly includes an electric cylinder (6) and a pipe seat (7). Each mounting bracket (5) is fixedly mounted with an electric cylinder (6). The moving end of the electric cylinder (6) is fixedly mounted with a pipe seat (7). The three-way valve (8) is fixedly mounted on the pipe seat (7).

6. A high-efficiency coil heat exchanger according to claim 3, characterized in that, A gate valve (9) is provided on the insertion tube (4). The insertion tube (4) is connected to the three-way valve (8) through the gate valve (9). A valve plate (901) and a valve stem (902) are slidably installed inside the gate valve (9). The valve stem (902) is coaxially and fixedly connected to the valve plate (901). The top of the valve stem (902) extends above the gate valve (9). The valve stem (902) is driven to rise and fall by the output component. When one end of the insertion tube (4) is connected to the inner tube (3), the output component drives the valve stem (902) to rise and fall.

7. A high-efficiency coil heat exchanger according to claim 6, characterized in that, The output component includes a limiting plate (10), an electric telescopic rod (11), a lifting plate (12), a tension spring (903), and a horizontal plate (904). The horizontal plate (904) is fixedly installed on the top of the valve stem (902). The horizontal plate (904) is connected to the top of the gate valve (9) through the tension spring (903). The tension spring (903) has a preload force that causes the horizontal plate (904) to descend. The limiting plate (10) is fixedly installed on the mounting bracket (5). The electric telescopic rod (11) is fixedly installed on the limiting plate (10). The lifting plate (12) is fixedly installed on the movable end of the electric telescopic rod (11). In the initial state, the horizontal height of the lifting plate (12) is lower than that of the horizontal plate (904). When the drive component drives the insertion tube (4) and the three-way valve (8) to move so that one end of the insertion tube (4) is connected to the inner tube (3), the horizontal plate (904) moves above the lifting plate (12).

8. A high-efficiency coil heat exchanger according to claim 7, characterized in that, Two symmetrically arranged extension plates (1201) are fixedly installed on one side of each lifting plate (12). When the horizontal plate (904) moves above the lifting plate (12), the valve stem (902) and the tension spring (903) are located between the two extension plates (1201), and the extension plates (1201) are located below the horizontal plate (904). When the electric telescopic rod (11) drives the lifting plate (12) to rise, the horizontal plate (904) rises synchronously, and the side of the horizontal plate (904) facing the three-way valve (8) slides with the limiting plate (10).

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