Heat exchanger assembly and control method of heat exchanger assembly

Abstract

The invention discloses a heat exchanger assembly and a control method of the heat exchanger assembly, and relates to the technical field of heat exchange tube leakage detection.The heat exchanger assembly comprises a heat exchanger, a heat exchange tube is arranged in the heat exchanger, a first flow channel is formed in the heat exchange tube, a second flow channel is formed between the inner wall of the heat exchanger and the heat exchange tube, and the first flow channel exchanges heat with the second flow channel; the two leakage detection assemblies each comprise a plugging piece, at least one of the two leakage detection assemblies is provided with a pressurization structure, the pressurization structure is used for pressurizing fluid supplied into the first flow channel after the end of the heat exchange tube is plugged, and at least one of the two leakage detection assemblies is provided with a pressure detection piece; the pressure detection piece is used for detecting the pressure in the first flow channel. According to the heat exchanger assembly, the leakage condition of the heat exchange tube can be judged according to the size relation between the internal pressure of the first flow channel and the pressurization pressure of the pressurization structure, the length of the heat exchange tube does not need to be traversed, and the detection efficiency can be improved.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger tube leakage detection technology, and in particular to a heat exchanger assembly and a control method for the heat exchanger assembly. Background Technology

[0002] Shell-and-tube heat exchangers consist of a shell and multiple heat exchange tubes. The fluid in the tubes exchanges heat with the fluid in the shell. If there is a leak in the heat exchange tubes, the fluid in the tubes will be lost, reducing the amount of fluid participating in heat exchange and thus reducing the heat exchanger's heat exchange capacity. Traditional methods for detecting leaks in heat exchange tubes include eddy current, ultrasound, visual inspection, X-ray, and gamma ray. However, these methods require traversing the length of the heat exchange tubes, which is time-consuming and inefficient, and there is room for improvement. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a heat exchanger assembly that eliminates the need to traverse the length of the heat exchange tubes, thereby shortening the detection time and improving the detection efficiency.

[0004] A heat exchanger assembly according to an embodiment of the present invention includes: a heat exchanger, wherein a heat exchange tube is disposed within the heat exchanger, a first flow channel is formed within the heat exchange tube, and a second flow channel is formed between the inner wall of the heat exchanger and the heat exchange tube, wherein the first flow channel exchanges heat with the second flow channel; two leakage detection components, each of the two leakage detection components including a sealing element, the sealing elements of the two leakage detection components being respectively used to seal both ends of the heat exchange tube, at least one of the two leakage detection components being provided with a pressurizing structure, the pressurizing structure being used to pressurize the fluid supplied to the first flow channel after the ends of the heat exchange tube are sealed, and at least one of the two leakage detection components being provided with a pressure detection element, the pressure detection element being used to detect the pressure in the first flow channel.

[0005] According to the heat exchanger assembly of the present invention, by forming a first flow channel and a second flow channel within the heat exchanger, and separating the first flow channel and the second flow channel by a heat exchange tube, the first fluid in the first flow channel and the second fluid in the second flow channel can exchange heat through the tube wall of the heat exchange tube, thereby realizing the heat exchange function of the heat exchanger. Moreover, the two ends of the heat exchange tube can be sealed by the sealing components of two leakage detection components, the first flow channel can be pressurized by at least one pressurizing structure, and the internal pressure of the first flow channel can be detected by at least one pressure detection component. The leakage of the heat exchange tube can be determined based on the relationship between the internal pressure of the first flow channel and the pressurizing pressure of the pressurizing structure, and there is no need to traverse the length of the heat exchange tube, which can shorten the detection time and improve the detection efficiency.

[0006] According to some embodiments of the present invention, each of the leak detection components includes a robotic arm movably mounted within the heat exchanger, and a sealing element is mounted on the movable end of the robotic arm so that the robotic arm drives the sealing element to seal or open the end of the heat exchange tube.

[0007] According to some embodiments of the present invention, in a heat exchanger assembly, there are multiple heat exchange tubes, and the multiple heat exchange tubes are spaced apart and distributed in the heat exchanger. The robotic arm is rotatably mounted in the heat exchanger, and the robotic arm is adapted to drive the sealing member to the end of any one of the multiple heat exchange tubes.

[0008] According to some embodiments of the present invention, the heat exchanger assembly further includes two heat exchanger tube sheets, which are spaced apart and distributed within the heat exchanger. The two ends of the heat exchange tube are respectively connected to the two heat exchanger tube sheets. The inner wall of the heat exchanger and the side of each heat exchanger tube sheet opposite to the heat exchange tube define a receiving cavity, and the robotic arm is movably mounted in the receiving cavity.

[0009] According to some embodiments of the present invention, in a heat exchanger assembly, the sealing member is located in the receiving cavity after the heat exchange tube is opened, and the receiving cavity is in communication with the first flow channel; wherein, the heat exchanger is provided with a first inlet communicating with one of the receiving cavities and a first outlet communicating with the other of the receiving cavities.

[0010] According to some embodiments of the present invention, the heat exchanger assembly further includes a main shell and two end caps, the two end caps being connected to both ends of the main shell, and two heat exchanger tube sheets being connected one-to-one to the connection points between the two end caps and the main shell. The end caps and the corresponding heat exchanger tube sheets define the receiving cavity, and the outer peripheral wall of the heat exchange tube, the main shell, and the two heat exchanger tube sheets together define the second flow channel.

[0011] According to some embodiments of the present invention, the heat exchanger assembly has a second inlet and a second outlet in the main housing, both of which are connected to the second flow channel; wherein the second inlet and the second outlet are located at the axial ends of the main housing, and / or the second inlet and the second outlet are located at the radial sides of the main housing.

[0012] According to some embodiments of the present invention, the heat exchanger assembly includes a plurality of mechanical joints that are rotatably connected in sequence, one of the mechanical joints located at one end is rotatably connected to the inner wall of the heat exchanger, and the mechanical joint located at the other end is connected to the sealing member.

[0013] According to some embodiments of the present invention, the heat exchanger assembly is configured as a resilient sealing plug; and / or, the pressurization structure is configured as a pressurization pump; and / or, the pressure detection element is configured as a pressure sensor.

[0014] The present invention also proposes a control method for a heat exchanger assembly.

[0015] According to the control method of the heat exchanger assembly of the present invention, the control method is applicable to the heat exchanger assembly described in any of the above embodiments, and the control method includes: sealing one end of one of the heat exchange tubes; pressurizing the first flow channel; detecting the internal pressure of the first flow channel; and determining the leakage status of the heat exchange tube based on the magnitude of the internal pressure of the heat exchange tube and the pressurized pressure.

[0016] The control method of the heat exchanger assembly and the advantages of the heat exchanger assembly over the prior art are the same, and will not be repeated here.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of a heat exchanger assembly according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the control method for the heat exchanger assembly according to the present invention.

[0019] Figure label: Heat exchanger assembly 100, Heat exchanger 1, heat exchange tube 11, first flow channel 111, second flow channel 12, first inlet 13, first outlet 14, main shell 15, second inlet 151, second outlet 152, end cap 16. Leak detection component 2, sealing component 21, pressurization structure 22, robotic arm 24, mechanical joint 241, Heat exchanger tube sheet 3, receiving cavity 31, connecting pipe 4, control unit 5. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] The following is for reference. Figures 1-2 The heat exchanger assembly 100 according to an embodiment of the present invention can determine the leakage of the heat exchange tube 11 based on the relationship between the internal pressure of the first flow channel 111 and the pressure of the pressurizing structure 22, without having to traverse the length of the heat exchange tube 11, thus shortening the detection time and improving the detection efficiency.

[0024] like Figure 1 As shown, a heat exchanger assembly 100 according to an embodiment of the present invention includes: a heat exchanger 1 and two leakage detection components 2.

[0025] Heat exchanger 1 is provided with heat exchange tube 11, and a first flow channel 111 is formed inside the heat exchange tube 11. A second flow channel 12 is formed between the inner wall of heat exchanger 1 and the heat exchange tube 11. The first flow channel 111 and the second flow channel 12 exchange heat. Both leakage detection components 2 include a sealing element 21. The sealing element 21 of the two leakage detection components 2 is used to seal both ends of the heat exchange tube 11. At least one of the two leakage detection components 2 is provided with a pressurizing structure 22. The pressurizing structure 22 is used to pressurize the fluid supplied to the first flow channel 111 after the ends of the heat exchange tube 11 are sealed. At least one of the two leakage detection components 2 is provided with a pressure detection element. The pressure detection element is used to detect the pressure in the first flow channel 111.

[0026] Specifically, the heat exchanger 1 has a heat exchange function, allowing two fluids to exchange heat within it. The heat exchanger 1 is equipped with a heat exchange tube 11, which is typically constructed as a circular tube with an internal cavity. A first flow channel 111 is formed within the heat exchange tube 11, allowing the first fluid to flow within it. A second flow channel 12 is formed between the inner wall of the heat exchanger 1 and the heat exchange tube 11, allowing the second fluid to flow within it. The first flow channel 111 and the second flow channel 12 exchange heat, meaning that the first fluid in the first flow channel 111 and the second fluid in the second flow channel 12 can exchange heat through the tube wall of the heat exchange tube 11, thus realizing the heat exchange function of the heat exchanger 1. Furthermore, the heat exchange tube 11 can separate the first flow channel 111 and the second flow channel 12, thereby preventing the mixing of the first fluid in the first flow channel 111 and the second fluid in the second flow channel 12, and improving the reliability of the heat exchange between the first fluid and the second fluid.

[0027] In practice, the heat exchange tube 11 can be made of a material with good thermal conductivity to improve the reliability and efficiency of heat exchange between the first fluid in the first flow channel 111 and the second fluid in the second flow channel 12. In addition, the heat exchange tube 11 is relatively long, which can extend the flow path of the first fluid in the first flow channel 111, thereby extending the heat exchange time of the two fluids and improving the reliability and efficiency of heat exchange between the first fluid and the second fluid.

[0028] Furthermore, the leak detection component 2 is used to detect whether there is a leak in the heat exchange tube 11, and the leak detection component 2 includes a sealing element 21, which is used to seal the end of the heat exchange tube 11. The leak detection component 2 is configured as two, and both leak detection components 2 include sealing elements 21. The two leak detection components 2 can be distributed at intervals along the extension direction of the heat exchange tube 11, and the two sealing elements 21 can be distributed at intervals along the extension direction of the heat exchange tube 11, so that the two sealing elements 21 can approach the two ends of the heat exchange tube 11 respectively, so as to seal the two ends of the heat exchange tube 11 by sealing the heat exchange tube 11.

[0029] Meanwhile, at least one of the two leakage detection components 2 is provided with a pressurizing structure 22. The pressurizing structure 22 can be set in one of the leakage detection components 2 or in both leakage detection components 2. After the end of the heat exchange tube 11 is sealed by at least one pressurizing structure 22, the fluid supplied to the first flow channel 111 is pressurized to effectively increase the pressure inside the heat exchange tube 11. At least one of the two leakage detection components 2 is provided with a pressure detection element. The pressure detection element can be set in one of the leakage detection components 2 or in both leakage detection components 2. The pressure inside the first flow channel 111 can be reliably detected by at least one pressure detection element. The detection pressure of the pressure detection element is the internal pressure of the heat exchange tube 11.

[0030] Then, by comparing the internal pressure of the heat exchange tube 11 with the pressure of the pressurizing structure 22, it can be determined whether there is a leak in the heat exchange tube 11. When the internal pressure is the same as the pressure, that is, the internal pressure of the heat exchange tube 11 can be maintained at the pressure, it can be determined that there is no leak in the heat exchange tube 11. When the internal pressure is less than the pressure, that is, the internal pressure of the heat exchange tube 11 cannot be maintained at the pressure, it can be determined that there is a leak in the heat exchange tube 11. Thus, the leak of the heat exchange tube 11 can be detected without traversing the length of the heat exchange tube 11, which can shorten the detection time and improve the detection efficiency.

[0031] It should be noted that when there is a leak in the heat exchange tube 11, the heat exchange tube 11 can also be continuously blocked by the sealing component 21 to prevent excessive first fluid from continuously flowing into the second flow channel 12 and mixing with the second fluid.

[0032] According to the embodiment of the present invention, the heat exchanger assembly 100 forms a first flow channel 111 and a second flow channel 12 within the heat exchanger 1, and the first flow channel 111 and the second flow channel 12 are separated by a heat exchange tube 11. This allows the first fluid in the first flow channel 111 and the second fluid in the second flow channel 12 to exchange heat through the tube wall of the heat exchange tube 11, thereby realizing the heat exchange function of the heat exchanger 1. Furthermore, the two ends of the heat exchange tube 11 can be sealed by the sealing members 21 of the two leakage detection components 2, the first flow channel 111 is pressurized by at least one pressurizing structure 22, and the internal pressure of the first flow channel 111 is detected by at least one pressure detection element. The leakage of the heat exchange tube 11 can be determined based on the relationship between the internal pressure of the first flow channel 111 and the pressurizing pressure of the pressurizing structure 22, without having to traverse the entire length of the heat exchange tube 11, thus shortening the detection time and improving the detection efficiency.

[0033] In some embodiments, each leak detection component 2 includes a robotic arm 24, which is movably mounted inside the heat exchanger 1. A plugging member 21 is mounted on the movable end of the robotic arm 24 so that the robotic arm 24 can drive the plugging member 21 to plug or open the end of the heat exchange tube 11.

[0034] Specifically, the leak detection component 2 is used to detect leaks in the heat exchange tube 11. The leak detection component 2 includes a robotic arm 24, which is movably installed inside the heat exchanger 1 so that the robotic arm 24 can move relative to the heat exchanger 1. A sealing member 21 is installed on the movable end of the robotic arm 24, so that one end of the robotic arm 24 can be connected to the heat exchanger 1 to realize the installation of the robotic arm 24. The other end of the robotic arm 24 is constructed as a movable end and connected to the sealing member 21, so that the robotic arm 24 can drive the sealing member 21 to move while moving relative to the heat exchanger 1, thereby enabling the robotic arm 24 to drive the sealing member 21 to seal or open the end of the tube heat exchanger.

[0035] The sealing component 21 is connected to the movable end of the robotic arm 24, so that the robotic arm 24 can move relative to the heat exchanger 1 and drive the sealing component 21 to move closer to or away from the end of the heat exchange tube 11. Thus, when the sealing component 21 moves closer to the end of the heat exchange tube 11, it can seal the end of the heat exchange tube 11, and when it moves away from the end of the heat exchange tube 11, it can open the end of the heat exchange tube 11. Each leakage detection component 2 includes a robotic arm 24, that is, each of the two leakage detection components 2 has a robotic arm 24, that is, the number of robotic arms 24 is two. The two sealing components 21 can be connected to the two robotic arms 24 one-to-one, so that when the two robotic arms 24 move relative to the heat exchanger 1, they can drive the corresponding sealing component 21 to move closer to or away from the end of the heat exchange tube 11, so as to simultaneously seal or open both ends of the heat exchange tube 11.

[0036] In some embodiments, there are multiple heat exchange tubes 11, and the multiple heat exchange tubes 11 are spaced apart and distributed in the heat exchanger 1. The robotic arm 24 is rotatably installed in the heat exchanger 1, and the robotic arm 24 is adapted to drive the sealing member 21 to the end of any one of the multiple heat exchange tubes 11.

[0037] Specifically, a first flow channel 111 is formed inside the heat exchange tube 11. The first flow channel 111 allows the first fluid to flow inside it to exchange heat with the second fluid. Multiple heat exchange tubes 11 can be set, that is, the number of heat exchange tubes 11 can be two, three or more, so that the first flow channel 111 can be formed inside each of the multiple heat exchange tubes 11. That is, the first fluid in the multiple first flow channels 111 can exchange heat with the second fluid through the tube walls of the multiple heat exchange tubes 11, which can improve the reliability and efficiency of the heat exchange between the first fluid and the second fluid. Moreover, the multiple heat exchange tubes 11 are distributed separately in the heat exchanger 1, so that there is a certain distance between the multiple heat exchange tubes 11, which can avoid interference between the multiple heat exchange tubes 11. The first fluid in the multiple first flow channels 111 can exchange heat with the second fluid separately, which effectively improves the reliability and efficiency of the heat exchange between the first fluid and the second fluid.

[0038] Meanwhile, the robotic arm 24 is rotatably installed inside the heat exchanger 1. For example, the robotic arm 24 can be connected to the heat exchanger 1 via a shaft pin, so that the robotic arm 24 can rotate relative to the heat exchanger 1. In this way, while the robotic arm 24 is rotating relative to the heat exchanger 1, it can drive the sealing member 21 to move to the end of any one of the multiple heat exchange tubes 11. This allows selective sealing of both ends of any one of the multiple heat exchange tubes 11, so that the leakage detection component 2 can selectively detect any one of the multiple heat exchange tubes 11 to ensure the reliable operation of the heat exchanger 1.

[0039] In some embodiments, the heat exchanger assembly 100 further includes two heat exchanger tube sheets 3, which are spaced apart and distributed within the heat exchanger 1. The two ends of the heat exchange tube 11 are respectively connected to the two heat exchanger tube sheets 3. The inner wall of the heat exchanger 1 and the side of each heat exchanger tube sheet 3 away from the heat exchange tube 11 define a receiving cavity 31, and the robotic arm 24 is movably installed in the receiving cavity 31.

[0040] Specifically, the heat exchanger tube sheet 3 is used to fix the heat exchanger tubes 11. By placing the heat exchanger tube sheet 3 inside the heat exchanger 1, it can be positioned close to the heat exchanger tubes 11, facilitating the fixation of the heat exchanger tubes 11. Since there are two heat exchanger tube sheets 3, both can be used to fix the heat exchanger tubes 11 simultaneously, improving the reliability of the fixation. Furthermore, by distributing the two heat exchanger tube sheets 3 spaced apart within the heat exchanger 1, each can be positioned close to both ends of the heat exchanger tubes 11, allowing both tube sheets to simultaneously fix the heat exchanger tubes 11 from both ends, improving the stability of the fixation and effectively ensuring the reliability of the first fluid flow within the first flow channel 111. Moreover, by using two heat exchanger tube sheets 3 to fix multiple heat exchanger tubes 11 simultaneously, the number of heat exchanger tube sheets 3 can be reduced, lowering the installation cost.

[0041] Furthermore, the inner wall of the heat exchanger 1 and the side of each heat exchanger tube sheet 3 facing away from the heat exchange tube 11 define a receiving cavity 31. That is, a receiving cavity 31 is formed on both sides of the heat exchange tube 11. The receiving cavity 31 is used to provide space for the setting and installation of the robotic arm 24. The robotic arm 24 is movably installed in the receiving cavity 31, so that the two robotic arms 24 are set one-to-one with the two receiving cavities 31. Thus, the two robotic arms 24 can be installed in the corresponding receiving cavity 31, which can realize the installation of the two robotic arms 24 in the heat exchanger 1. The two robotic arms 24 can approach the two ends of the heat exchange tube 11 respectively, so as to block or open the two ends of the heat exchange tube 11 while rotating relative to the heat exchanger 1.

[0042] In some embodiments, the sealing member 21 is located in the receiving cavity 31 after the heat exchange tube 11 is opened, and the receiving cavity 31 is in communication with the first flow channel 111; wherein, the heat exchanger 1 is provided with a first inlet 13 communicating with one of the receiving cavities 31 and a first outlet 14 communicating with the other receiving cavity 31.

[0043] Specifically, the robotic arm 24 is installed in the receiving cavity 31. The sealing member 21 is positioned in the receiving cavity 31 after the heat exchange tube 11 is opened. The sealing member 21 is also placed in the receiving cavity 31 so that it can face the robotic arm 24. This allows the robotic arm 24 to move the sealing member 21 to block or open the end of the heat exchange tube 11. The receiving cavity 31 is connected to the first flow channel 111. When the sealing member 21 opens the end of the heat exchange tube 11, the first flow channel 111 can be connected to the receiving cavity 31, allowing the first fluid to flow between the two receiving cavities 31 through the first flow channel 111.

[0044] The heat exchanger 1 is provided with a first inlet 13 and a first outlet 14. The first inlet 13 is connected to one of the receiving cavities 31, so that the first fluid from the outside can enter one of the receiving cavities 31 and then enter the heat exchange tube 11. It flows in the heat exchange tube 11 and exchanges heat with the second fluid. The first outlet 14 is connected to another receiving cavity 31, so that the first fluid in the heat exchange tube 11 can enter the other receiving cavity 31 after exchanging heat with the second fluid and flow out from the first outlet 14. This can realize the unidirectional flow of the first fluid and improve the heat exchange efficiency between the first fluid and the second fluid.

[0045] In some embodiments, the heat exchanger 1 further includes a main shell 15 and two end caps 16. The two end caps 16 are connected to both ends of the main shell 15. Two heat exchanger tube sheets 3 are connected one-to-one to the connection between the two end caps 16 and the main shell 15. The end caps 16 and the corresponding heat exchanger tube sheets 3 define a receiving cavity 31. The outer peripheral wall of the heat exchange tube 11, the main shell 15 and the two heat exchanger tube sheets 3 together define a second flow channel 12.

[0046] Specifically, the main shell 15 serves as the external shell structure of the heat exchanger 1, providing space for the installation of components within the heat exchanger 1. The main shell 15 is cylindrical, allowing the heat exchange tubes 11 to be housed inside, thus protecting the heat exchange tubes 11 from damage caused by collisions with external structures. The end caps 16 are important sealing components at the ends of the heat exchanger 1, primarily used for sealing, protection, support, and optimizing fluid distribution. Two end caps 16 are provided, connected to the two ends of the main shell 15 respectively. The end caps 16 can be tightly connected to the main shell 15 via bolts or welding to form a closed space, ensuring that the first fluid within the heat exchange tubes 11 or the second fluid within the main shell 15 does not leak into the external environment.

[0047] Furthermore, by connecting the two heat exchanger tube sheets 3 one-to-one with the connection points of the two end caps 16 and the main shell 15, the heat exchanger tube sheets 3 can be positioned between the end caps 16 and the heat exchange tubes 11, so that the end caps 16 and the corresponding heat exchanger tube sheets 3 can define a receiving cavity 31, which allows the robotic arm 24 to be positioned in the receiving cavity 31. The robotic arm 24 can move while driving the sealing member 21 to seal or open the end of the heat exchange tube 11. Moreover, the outer peripheral wall of the heat exchange tube 11, the main shell 15, and the two heat exchanger tube sheets 3 together define the second flow channel 12, allowing the second fluid to flow in the second flow channel 12. The first flow channel 111 and the second flow channel 12 can be separated by the tube wall of the heat exchange tube 11, ensuring that the first fluid and the second fluid can reliably exchange heat.

[0048] It should be noted that heat exchanger 1 includes a main shell 15 and multiple heat exchange tubes 11, that is, heat exchanger 1 can be constructed as a shell-and-tube heat exchanger, such as... Figure 1 As shown, the end cap 16 defines a receiving cavity 31 between itself and the heat exchanger tube sheet 3. One of the receiving cavities 31 is connected to the first inlet 13, and the other is connected to the first outlet 14. A guide plate or distributor can be provided in the end cap 16 so that the first fluid entering the receiving cavity 31 can be evenly distributed to each heat exchange tube 11 to avoid excessively high or low local flow velocities, thereby improving the uniformity of heat exchange. The end cap 16 can also be constructed as a hemispherical shape to reduce the stagnation area of ​​the first fluid at the end and reduce the risk of scaling or corrosion.

[0049] In some embodiments, the main housing 15 is provided with a second inlet 151 and a second outlet 152, both of which are connected to the second flow channel 12; wherein the second inlet 151 and the second outlet 152 are located at the two axial ends of the main housing 15, and / or the second inlet 151 and the second outlet 152 are located on the two radial sides of the main housing 15.

[0050] Specifically, the main housing 15 is provided with a second inlet 151 and a second outlet 152. Both the second inlet 151 and the second outlet 152 can be used to connect the second flow channel 12 with the external space, so that the external second fluid can enter the second flow channel 12 from the second inlet 151, flow in the second flow channel 12 and exchange heat with the first fluid in the first flow channel 111, and then flow out from the second outlet 152. This can realize the unidirectional flow of the second fluid and improve the reliability and efficiency of heat exchange between the first fluid and the second fluid.

[0051] The second inlet 151 and the second outlet 152 can be respectively disposed at both ends of the axial direction of the main housing 15, so that the second inlet 151 and the second outlet 152 are distributed opposite to each other along the axial direction of the main housing 15, thereby spacing the second inlet 151 and the second outlet 152 apart and ensuring the reliability of the unidirectional flow of the second fluid. At the same time, the second inlet 151 and the second outlet 152 can also be respectively disposed on both sides of the radial direction of the main housing 15, so that the second inlet 151 and the second outlet 152 are distributed opposite to each other along the radial direction of the main housing 15, thereby spacing the second inlet 151 and the second outlet 152 apart and ensuring the reliability of the unidirectional flow of the second fluid.

[0052] In such Figure 1 In the illustrated embodiment, the second inlet 151 and the second outlet 152 are located on the radial sides and axial ends of the main housing 15, respectively. This effectively ensures the reliability of the unidirectional flow of the second fluid and extends the flow path of the second fluid within the second flow channel 12, thereby improving the reliability and efficiency of heat exchange between the first fluid and the second fluid. Furthermore, the first inlet 13 and the first outlet 14 are located at the axial ends of the heat exchanger 1, which means that the first inlet 13 and the first outlet 14 are distributed relative to each other along the axial direction of the heat exchanger 1 to ensure the reliability of the unidirectional flow of the first fluid. This ensures reliable heat exchange between the first fluid and the second fluid. Moreover, the first inlet 13 and the first outlet 14 can be spaced apart from the second inlet 151 and the second outlet 152 to ensure reliable flow and heat exchange between the first fluid and the second fluid.

[0053] In some embodiments, the robotic arm 24 includes a plurality of mechanical joints 241 that are rotatably connected in sequence. One of the mechanical joints 241 is rotatably connected to the inner wall of the heat exchanger 1, and the other mechanical joint 241 is connected to the sealing member 21.

[0054] Specifically, the robotic arm 24 includes multiple mechanical joints 241 that are rotatably connected in sequence. That is, the number of mechanical joints 241 can be two, three or more, and all mechanical joints 241 can rotate relative to each other. The multiple mechanical joints 241 can increase the degree of freedom of the robotic arm 24. By rotatably connecting one of the mechanical joints 241 at one end to the inner wall of the heat exchanger 1, the robotic arm 24 can be installed in the heat exchanger 1. The mechanical joint 241 at the other end is connected to the sealing member 21, so that while the robotic arm 24 rotates relative to the heat exchanger 1, it can drive the sealing member 21 to move to seal or open the end of the heat exchange tube 11.

[0055] In such Figure 1In the illustrated embodiment, the robotic arm 24 includes three mechanical joints 241. One of the three mechanical joints 241 at one end is rotatably connected to the inner wall of the end cap 16, and the other mechanical joint 241 at the other end is connected to the sealing member 21. This allows the robotic arm 24 to rotate relative to the heat exchanger 1 via the mechanical joints 241, thereby driving the sealing member 21 to seal or open the end of the heat exchanger 1 while rotating. Moreover, the three mechanical joints 241 can increase the degree of freedom of the robotic arm 24, and at the same time, the volume of the robotic arm 24 and the space occupied in the heat exchanger 1 can be minimized.

[0056] In practice, multiple sealing elements 21 can be installed in the receiving cavity 31. A robotic arm 24 can grab one of the sealing elements 21 to seal the end of one of the heat exchange tubes 11. If a leak is detected in one of the heat exchange tubes 11, one of the sealing elements 21 can be used to continuously seal the end of one of the heat exchange tubes 11. Then, the robotic arm 24 can grab other sealing elements 21 to seal and test other heat exchange tubes 11, so that multiple heat exchange tubes 11 can be traversed to test all of them. Conversely, if a leak is detected in one of the heat exchange tubes 11, one of the sealing elements 21 can be removed from the end of one of the heat exchange tubes 11 to continue to seal and test other heat exchange tubes 11.

[0057] In some embodiments, the sealing element 21 is configured as a resilient sealing plug; and / or, the pressurizing structure 22 is configured as a pressurizing pump; and / or, the pressure sensing element is configured as a pressure sensor.

[0058] Specifically, the sealing element 21 can be constructed as an elastic sealing plug. The elastic sealing plug has a certain elasticity, which can improve the reliability of sealing the end of the heat exchange tube 11. Moreover, the method of sealing the end of the heat exchange tube 11 by the elastic sealing plug is simple, reliable and easy to operate. In practice, the elastic sealing element can be constructed as a wedge shape so that the elastic sealing plug can be inserted into the end of the heat exchange tube 11 to seal the end of the heat exchange tube 11. The elastic sealing element can also be constructed as a T-shape to improve the reliability of sealing the end of the heat exchange tube 11.

[0059] It is understandable that the method of sealing the end of the heat exchange tube 11 by controlling the sealing component 21 through the robotic arm 24 can adapt to different pipe shapes, and a cleaning device can be set at the end of the heat exchange tube 11 to ensure the reliability of sealing the end of the heat exchange tube 11. Moreover, the robotic arm 24 can be constructed as a foldable robotic arm, which can be retracted to avoid affecting the flow of the first fluid in the end cap 16, thereby improving the anti-interference ability. The robotic arm 24 can be driven by hydraulic, electric or pneumatic means.

[0060] Meanwhile, the pressurizing structure 22 can be configured as a pressurizing pump. After the sealing member 21 seals the end of the heat exchange tube 11, the pressurizing pump can pressurize the heat exchange tube 11. By installing the pressurizing pump on the robotic arm 24, the pressurizing pump can be placed close to the elastic sealing plug, so that the pressurizing pump can be close to the heat exchange tube 11, so as to pressurize the first flow channel 111. The pressurizing pump pressurizes by supplying fluid into the heat exchange tube 11. By installing the pressurizing pump on the robotic arm 24, the pressurizing pump can be placed in the receiving cavity 31, so that the pressurizing pump can fill the first fluid in the receiving cavity 31 into the first flow channel 111 to pressurize the first flow channel 111.

[0061] It should be noted that when increasing the internal pressure of the heat exchange tube 11 by pressurizing the pump, the internal pressure of the heat exchange tube 11 can be increased by a small amount through pressure control. The pressure increase shall not exceed one-tenth of the design pressure of the heat exchange tube 11. When pressurizing the first flow channel 111 by pressurizing the pump, a step, pulse or periodic pressurization procedure can be used to achieve reliable pressurization of the first flow channel 111.

[0062] Furthermore, the pressure detection element is used to detect the internal pressure of the heat exchange tube 11. The pressure detection element can be constructed as a pressure sensor, which can detect the internal pressure of the heat exchange tube 11. By comparing the internal pressure of the heat exchange tube 11 with the pressurization pressure of the pressurizing pump, it can be determined whether there is a leak in the heat exchange tube 11.

[0063] It should be noted that when obtaining the internal pressure of the heat exchange tube 11 through the pressure detection device, high-frequency pressure sampling can be performed to ensure the accuracy of the detection results, and if... Figure 1 As shown, there are two pressurizing structures 22 and two pressure detection devices. The two pressurizing structures 22 are respectively installed on the two robotic arms 24 and are respectively connected to the inside of the heat exchange tube 11 through the connecting pipe 4. One of the pressurizing structures 22 can be used as a backup for the other pressurizing structure 22, which helps to extend the service life of the heat exchanger assembly 100. The two pressure detection devices can be respectively connected to the end of the sealing member 21 facing the inside of the heat exchange tube 11, so as to reliably detect the internal pressure of the heat exchange tube 11 through the pressure detection device. One of the two pressure detection devices can be used as a backup for the other to ensure the reliability of pressure detection.

[0064] Moreover, such as Figure 1As shown, the heat exchanger assembly 100 also includes a control unit 5, which is connected to the robotic arm 24, the pressurizing structure 22, and the pressure detection element. The control unit 5 can control the robotic arm 24 so that it can move relative to the heat exchanger 1 to drive the sealing element 21 to seal or open the end of the heat exchange tube 11. It can also control the pressurizing structure 22 to supply fluid into the first flow channel 111 for pressurization. Then, the control unit 5 can control the robotic arm 24 according to the detection result of the pressure detection element so that the robotic arm 24 can drive the sealing element 21 to continuously seal or open the heat exchange tube 11.

[0065] Furthermore, it should be noted that multiple sealing components 21 can be installed within the accommodating cavity 31. After sealing one leaking heat exchange tube 11 with the sealing component 21, other heat exchange tubes 11 can be sealed with other sealing components 21 for detection. Alternatively, all heat exchange tubes 11 can be traversed and all leaking heat exchange tubes 11 can be sealed sequentially. Moreover, an endoscope or other structure can be installed inside the heat exchanger 1 to observe the condition of the heat exchange tubes 11. The leak detection component 2 can be installed even when the machine is stopped. By installing the robotic arm 24, sealing components 21, pressurizing structure 22, and pressure detection component inside the heat exchanger 1, it can be unaffected by the external environment, thus increasing the applicability of the heat exchanger assembly 100. In practice, the pressurizing pump can also be constructed as a gas cylinder, accumulator, etc.

[0066] The present invention also proposes a control method for a heat exchanger assembly 100.

[0067] According to the control method of the heat exchanger assembly 100 of the present invention, the control method is applicable to the heat exchanger assembly 100 in any of the above embodiments, and as follows: Figure 2 As shown, the control methods include: S10: Seal off the end of one of the heat exchange tubes 11.

[0068] Specifically, a leak detection component 2 is provided in the heat exchanger assembly 100. The leak detection component 2 is used to detect the leakage of the heat exchange tube 11. When the heat exchange tube 11 is tested, the two ends of one of the multiple heat exchange tubes 11 can be sealed by two sealing parts 21 so that a sealed space can be formed in the heat exchange tube 11 to facilitate subsequent testing steps.

[0069] S20: Apply pressure to the first flow channel 111.

[0070] Then, pressure can be applied to the first flow channel 111. A pressure pump is provided in the heat exchanger 1. The pressure pump can pressurize the first flow channel 111 and is set in the receiving cavity 31 so that the pressure pump can inject the first fluid in the receiving cavity 31 into the heat exchange tube 11 to change the internal pressure of the heat exchange tube 11. This increases the internal pressure of the heat exchange tube 11. Then, the presence of leakage in the heat exchange tube 11 can be determined by comparing the internal pressure of the heat exchange tube 11 with the pressure applied by the pressure pump.

[0071] S30: Detect the internal pressure of the first flow channel 111.

[0072] Then, the presence of a leak in the heat exchange tube 11 can be determined by comparing the internal pressure of the heat exchange tube 11 with the pressurization pressure of the pressurizing pump. Before this, the internal pressure of the heat exchange tube 11 needs to be tested. A pressure detection device is installed at the end of the sealing member 21 facing the inside of the heat exchange tube 11. The internal pressure of the heat exchange tube 11 can be detected in real time through the pressure detection device.

[0073] S40: Determine the leakage status of heat exchange tube 11 based on the internal pressure and pressurization pressure of heat exchange tube 11.

[0074] Finally, the leakage status of heat exchange tube 11 can be determined based on the difference between the internal pressure and the pressurization pressure. When the internal pressure of heat exchange tube 11 equals the pressurization pressure, it indicates that there is no leakage in heat exchange tube 11. The current heat exchange tube 11 can be opened by the mechanical arm 24 driving the sealing component 21, and then other heat exchange tubes 11 can be sealed and tested. In this way, multiple heat exchange tubes 11 can be traversed, and all heat exchange tubes 11 can be tested. When the internal pressure of heat exchange tube 11 is less than the pressurization pressure, it indicates that the established pressure cannot be maintained for a long time, and there is a leakage in heat exchange tube 11. The sealing component 21 can then continuously seal the heat exchange tube 11 to prevent excessive first fluid from continuously flowing into the second flow channel 12 and mixing with the second fluid.

[0075] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0076] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A heat exchanger assembly, characterized in that, include: A heat exchanger (1) is provided with a heat exchange tube (11) and a first flow channel (111) is formed inside the heat exchange tube (11). A second flow channel (12) is formed between the inner wall of the heat exchanger (1) and the heat exchange tube (11). The first flow channel (111) and the second flow channel (12) exchange heat. Two leakage detection components (2) are provided, each of which includes a sealing element (21). The sealing elements (21) of the two leakage detection components (2) are used to seal both ends of the heat exchange tube (11). At least one of the two leakage detection components (2) is provided with a pressurizing structure (22). The pressurizing structure (22) is used to pressurize the fluid supplied to the first flow channel (111) after the end of the heat exchange tube (11) is sealed. At least one of the two leakage detection components (2) is provided with a pressure detection element. The pressure detection element is used to detect the pressure in the first flow channel (111).

2. The heat exchanger assembly according to claim 1, characterized in that, Each of the leak detection components (2) includes a robotic arm (24) which is movably mounted inside the heat exchanger (1). A plugging element (21) is mounted on the movable end of the robotic arm (24) so ​​that the robotic arm (24) can drive the plugging element (21) to plug or open the end of the heat exchange tube (11).

3. The heat exchanger assembly according to claim 2, characterized in that, There are multiple heat exchange tubes (11), and the multiple heat exchange tubes (11) are spaced apart and distributed in the heat exchanger (1). The robotic arm (24) is rotatably installed in the heat exchanger (1), and the robotic arm (24) is adapted to drive the sealing member (21) to move to the end of any one of the multiple heat exchange tubes (11).

4. The heat exchanger assembly according to claim 2, characterized in that, It also includes two heat exchanger tube sheets (3), which are spaced apart and distributed in the heat exchanger (1). The two ends of the heat exchange tube (11) are respectively connected to the two heat exchanger tube sheets (3). The inner wall of the heat exchanger (1) and the side of each heat exchanger tube sheet (3) away from the heat exchange tube (11) define a receiving cavity (31). The robotic arm (24) is movably installed in the receiving cavity (31).

5. The heat exchanger assembly according to claim 4, characterized in that, The sealing element (21) is located in the receiving cavity (31) after the heat exchange tube (11) is opened, and the receiving cavity (31) is connected to the first flow channel (111); The heat exchanger (1) is provided with a first inlet (13) communicating with one of the receiving cavities (31) and a first outlet (14) communicating with the other of the receiving cavities (31).

6. The heat exchanger assembly according to claim 4, characterized in that, The heat exchanger (1) further includes a main shell (15) and two end caps (16). The two end caps (16) are connected to both ends of the main shell (15). The two heat exchanger tube sheets (3) are connected one-to-one to the connection between the two end caps (16) and the main shell (15). The end caps (16) and the corresponding heat exchanger tube sheets (3) define the receiving cavity (31). The outer peripheral wall of the heat exchange tube (11), the main shell (15) and the two heat exchanger tube sheets (3) together define the second flow channel (12).

7. The heat exchanger assembly according to claim 6, characterized in that, The main housing (15) is provided with a second inlet (151) and a second outlet (152), both of which are connected to the second flow channel (12); The second inlet (151) and the second outlet (152) are located at the two axial ends of the main housing (15), and / or the second inlet (151) and the second outlet (152) are located on the two radial sides of the main housing (15).

8. The heat exchanger assembly according to claim 2, characterized in that, The robotic arm (24) includes a plurality of mechanical joints (241) that are rotatably connected in sequence. One of the mechanical joints (241) at one end is rotatably connected to the inner wall of the heat exchanger (1), and the other mechanical joint (241) at the other end is connected to the sealing member (21).

9. The heat exchanger assembly according to claim 1, characterized in that, The sealing element (21) is constructed as an elastic sealing plug; And / or, the pressurizing structure (22) is configured as a pressurizing pump; And / or, the pressure detection element is configured as a pressure sensor.

10. A control method for a heat exchanger assembly, characterized in that, The control method is applicable to the heat exchanger assembly according to any one of claims 1-9, and the control method includes: Seal off the end of one of the heat exchange tubes (11); Pressurize the first flow channel (111); Detect the internal pressure of the first flow channel (111); The leakage status of the heat exchange tube (11) is determined based on the internal pressure and the applied pressure of the heat exchange tube (11).

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