Single-strand-flow winding pipe type heat exchanger with row pipes and installation method of single-strand-flow winding pipe type heat exchanger

Abstract

The invention belongs to the technical field of heat exchangers, and particularly relates to a single-strand-flow winding pipe type heat exchanger with tube nests and an installation method thereof.The single-strand-flow winding pipe type heat exchanger comprises a pipe shell, an end socket is installed on the pipe shell, a liquid inlet pipe and a liquid outlet pipe are installed on the pipe shell, and an air inlet pipe and an air outlet pipe are installed on the end socket; tube plates are installed in the tube shell, and heat exchange tubes are installed between the tube plates. A plurality of concentric circles are defined by the heat exchange tubes in the tube shell; a rotating ring is mounted on the tube plate, a connecting rod is mounted on the rotating ring, and a cleaning piece is mounted on the connecting rod; blades are mounted on the rotating ring; the inner wall of the tube shell and the outer wall of the tube pass are automatically cleaned, the scaling possibility is reduced, the heat exchange efficiency and the heat exchange effect of the heat exchanger are improved, the cleaning and maintenance period of the heat exchanger is prolonged, the heat exchange tubes are combined for use, the strength of the heat exchange tubes is improved under the condition that the heat exchange performance is guaranteed, and the service life is prolonged. And the situation that the heat exchange tube is deformed and fractured due to liquid flow impact is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of heat exchangers, in particular to a single-stream wound tube heat exchanger with tube arrays and an installation method thereof. Background Art

[0002] The wound-tube heat exchanger is a highly efficient heat exchanger with excellent properties, including high heat transfer intensity and efficiency, low thermal stress, high space efficiency, no dead zones, and minimal clogging. Compared to traditional shell-and-tube heat exchangers, the wound-tube heat exchanger offers many advantages, including higher heat transfer efficiency, lower specific energy consumption, greater cost-effectiveness, and a smaller footprint.

[0003] When wound-tube heat exchangers are used for a long time, dirt is prone to accumulation and scaling on the shell and heat exchange tubes. Furthermore, scaling on the inner wall of the shell and outer wall of the tube is difficult to clean, which can seriously affect the heat transfer efficiency and the heat exchange performance of the heat exchanger. Therefore, the heat exchanger needs to be disassembled and cleaned regularly. However, the cleaning process is cumbersome, time-consuming, and labor-intensive. Frequent disassembly can also affect the sealing performance of the heat exchanger, causing leakage problems and creating safety hazards. At the same time, when the heat exchanger is in operation, the heat exchange tubes will be impacted by the flow of the medium, which can easily cause the weak copper tubes to bend, deform, or even break, affecting the normal operation of the heat exchanger. Summary of the Invention

[0004] In order to make up for the shortcomings of the existing technology, the inner wall of the tube shell and the outer wall of the tube side are automatically cleaned to reduce the possibility of scaling, improve the heat exchange efficiency and heat exchange effect of the heat exchanger, extend the cleaning and maintenance cycle of the heat exchanger, and use the heat exchange tubes in combination to improve the strength of the heat exchange tubes while ensuring the heat exchange performance, and avoid the heat exchange tubes from being deformed and broken by the impact of liquid flow. The present invention proposes a single-stream wound tube heat exchanger with tube arrays and an installation method thereof.

[0005] The technical solution adopted by the present invention to solve the technical problem is as follows: the present invention provides a single-stream wound tube heat exchanger with a tube array, comprising a tube shell, an upper head and a lower head installed at both ends of the tube shell, an air inlet pipe installed on the upper head, an air outlet pipe installed on the lower head, a liquid outlet pipe installed on the upper end of the tube shell, and a liquid inlet pipe installed on the lower end of the tube shell; An upper tube sheet and a lower tube sheet are installed at both ends of the tube shell, and a heat exchange tube is installed between the upper tube sheet and the lower tube sheet; The heat exchange tubes are arranged in a plurality of concentric circles within the shell. A guide ring is provided on the surface of the heat exchange tube. The guide ring is connected to the heat exchange tube via an elastic rod. A radial gap is provided on the guide ring. The guide ring is made of an elastic material. A gap exists between the guide ring and the heat exchange tube. Mounting rings are mounted on the opposing surfaces of the upper tube plate and the lower tube plate, a rotating ring is mounted on the mounting ring, a connecting rod is mounted on the rotating ring, a cleaning sheet is mounted on the connecting rod, and the cleaning sheet contacts the heat exchange tube; Blades are installed on the rotating ring, and the outlets of the liquid inlet pipe and the liquid outlet pipe are aligned with the blades; An isolation layer is installed on the inner wall of the tube shell, and a deformation layer is installed on the isolation layer. The elasticity of the deformation layer is greater than that of the isolation layer. An air cavity is evenly arranged between the deformation layer and the isolation layer, and the cross section of the deformation cavity is elliptical.

[0006] Preferably, there is relative rotation between the connecting rod and the rotating ring, and a contact ring is installed on the lower tube plate, the cross section of the contact ring is an inverted L shape, and the upper end of the contact ring is in contact with the connecting rod; The cleaning sheet is in a spiral shape, and the spiral shape of the cleaning sheet is opposite to the spiral shape of the heat exchange tube.

[0007] Preferably, there is an angle between the center lines of the liquid inlet pipe and the liquid outlet pipe and the diameter of the tube shell.

[0008] Preferably, a transmission roller is installed on the upper tube plate, and a protruding edge is provided at the edge of the rotating ring on the upper tube plate, and the transmission roller and the protruding edge are in contact with each other; A meshing layer is installed on the portion of the transmission roller that contacts the protruding edge. A gear-shaped groove is provided on the protruding edge. The meshing layer cooperates with the gear-shaped groove. The meshing layer is made of elastic material.

[0009] Preferably, an axial through hole is opened on the driving roller, and a plurality of driving rollers are evenly arranged along the circumferential direction of the tube shell.

[0010] Preferably, the cleaning piece on the connecting rod contacts the inner wall of the tube shell, and the corresponding position of the air cavity on the deformation layer contacts the cleaning piece and deforms.

[0011] Preferably, the heat exchange tube includes a main tube and a reinforcement tube, the main tube and the reinforcement tube share an outlet and an inlet, the strength of the reinforcement tube is greater than that of the main tube, and the thermal conductivity of the main tube is better than that of the reinforcement tube; The main pipe and the reinforcement pipe are spirally wound together, the thickness of the main pipe is smaller than that of the reinforcement pipe, and a silicone gasket is installed between the main pipe and the reinforcement pipe.

[0012] A method for installing a single-stream wound tube heat exchanger with tubes, characterized in that the method is applicable to any of the above-mentioned single-stream wound tube heat exchangers with tubes, and the method comprises the following steps: S1: Spirally wind the main pipe and reinforcement pipe of the same shape together, and process the outlets and inlets at both ends so that they share the same set of outlets and inlets to obtain a complete heat exchange pipe; S2: Fix the mounting ring and rotating ring to the tube sheet, then install one of the tube sheets into the tube shell. Then, install the heat exchange tubes and connecting rods layer by layer from the inside to the outside along the radius of the tube shell. Finally, install the other tube sheet into the tube shell. S3: Install the air inlet pipe and the air outlet pipe on the two heads respectively, and install the liquid inlet pipe and the liquid outlet pipe on both ends of the tube shell respectively. Finally, install the two heads on the tube shell to complete the installation of the heat exchanger.

[0013] The beneficial effects of the present invention are as follows: 1. The present invention discloses a single-stream wound tube heat exchanger with tube arrays and an installation method thereof. By arranging the heat exchange tubes to be distributed in a concentric circle shape, the liquid flow path in the tube shell is dispersed and complicated, thereby improving the disturbance effect on the liquid. At the same time, the surfaces of the heat exchange tubes and the inner wall of the tube shell are cleaned by the circular motion of the connecting rod and the cleaning sheet, thereby avoiding the accumulation of dirt and affecting the normal use of the heat exchanger. At the same time, under the impact of liquid flow, the deformation layer on the inner wall of the tube shell will vibrate and shake with the cooperation of the air cavity, thereby reducing the possibility of dirt adhering to the inner wall of the tube shell, and utilizing the isolation layer and the deformation layer to protect the inner wall of the tube shell and avoid the inner wall of the tube shell from being corroded by the liquid. At the same time, the circular motion of the connecting rod will stir the liquid in the tube shell, promote the uniform distribution of the liquid in the tube shell, and make the liquid in a turbulent state, thereby improving the heat exchange effect and heat exchange efficiency between the heat exchange tube and the liquid.

[0014] 2. The present invention discloses a single-stream wound tube heat exchanger with tube arrays and an installation method thereof. By arranging a main tube and a reinforcement tube to form a heat exchange tube, the strength of the heat exchange tube is improved, and the heat exchange tube is prevented from bending, deformation, or even breaking after being impacted by the flow of liquid. At the same time, the reinforcement tube is used to increase the strength of the heat exchange tube, thereby reducing the thickness of the main tube, improving the heat exchange efficiency and heat exchange effect of the main tube portion, and improving the heat exchange effect of the heat exchange tube.

[0015] 3. The present invention discloses a single-stream wound tube heat exchanger with tubes and an installation method thereof. By providing blades, a rotating ring, a connecting rod, a contact ring and a transmission roller, the rotating ring drives the connecting rod to move in a circular motion, causing the connecting rod to rotate on its own. This ensures that the cleaning blades on the connecting rod are in full contact with the heat exchange tubes, thereby improving the cleaning effect of dirt attached to the heat exchange tubes and the inner walls of the tube shell. At the same time, under the action of the transmission roller, the various rotating rings are able to interact with each other and maintain synchronous rotation, thereby preventing the blades on the rotating ring near the middle of the tube shell from being subjected to insufficient liquid impact force, causing the rotating ring to rotate too slowly or not at all, thereby affecting the normal use of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 is a perspective view of a heat exchanger of the present invention; Figure 2 This is a top view of the heat exchanger of the present invention with the upper head removed; Figure 3 It is a structural schematic diagram of the lower tube plate in the heat exchanger of the present invention; Figure 4 Schematic diagram of the structure of the upper tube plate in the heat exchanger of the present invention; Figure 5 Schematic diagram of the structure of the main pipe and the reinforcement pipe in the heat exchanger of the present invention; wherein the silica gel gasket is not marked; Figure 6 It is a structural schematic diagram of the connecting rod and the cleaning sheet in the heat exchanger of the present invention; Figure 7 is a partial cross-sectional view of the shell and tube in the heat exchanger of the present invention; Figure 8 This is a schematic structural diagram of a guide ring installed on a heat exchange tube in a heat exchanger of the present invention; Figure 9 Figure 3 A partial enlarged view of the middle part; Figure 10 yes Figure 4 A partial enlarged view of point B in the middle; Figure 11 It is a flowchart of the steps of the heat exchanger installation method of the present invention; In the figure: tube shell 1, upper head 11, lower head 12, liquid outlet pipe 13, liquid inlet pipe 14, air inlet pipe 15, air outlet pipe 16, heat exchange tube 2, main pipe 21, reinforcement pipe 22, guide ring 23, fixing rod 231, slit 232, connecting rod 3, cleaning sheet 31, upper tube plate 4, lower tube plate 5, rotating ring 6, mounting ring 61, blade 62, contact ring 63, transmission roller 7, meshing layer 71, isolation layer 8, deformation layer 81, air cavity 82. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0019] like Figures 1 to 11 As shown, the present invention provides a single-stream wound tube heat exchanger with tube arrays, comprising a tube shell 1, with an upper head 11 and a lower head 12 installed at both ends of the tube shell 1, an air inlet pipe 15 installed on the upper head 11, and an air outlet pipe 16 installed on the lower head 12, a liquid outlet pipe 13 installed at the upper end of the tube shell 1, and a liquid inlet pipe 14 installed at the lower end of the tube shell 1; An upper tube sheet 4 and a lower tube sheet 5 are installed at both ends of the tube shell 1, and a heat exchange tube 2 is installed between the upper tube sheet 4 and the lower tube sheet 5; The heat exchange tubes 2 are arranged in a plurality of concentric circles within the tube shell 1. A guide ring 23 is provided on the surface of the heat exchange tube 2. The guide ring 23 is connected to the heat exchange tube 2 via an elastic rod 231. A radial slit 232 is provided on the guide ring 23. The guide ring 23 is made of an elastic material, and there is a gap between the guide ring 23 and the heat exchange tube 2. Mounting rings 61 are mounted on the opposing surfaces of the upper tube plate 4 and the lower tube plate 5, a rotating ring 6 is mounted on the mounting ring 61, a connecting rod 3 is mounted on the rotating ring 6, a cleaning sheet 31 is mounted on the connecting rod 3, and the cleaning sheet 31 is in contact with the heat exchange tube 2; The rotating ring 6 is provided with blades 62 , and the outlets of the liquid inlet pipe 14 and the liquid outlet pipe 13 are aligned with the blades 62 ; An isolation layer 8 is installed on the inner wall of the tube shell 1, and a deformation layer 81 is installed on the isolation layer 8. The elasticity of the deformation layer 81 is greater than that of the isolation layer 8. An air cavity 82 is evenly provided between the deformation layer 81 and the isolation layer 8. The cross section of the deformation cavity is elliptical. The spiral heat exchange tubes 2 are evenly installed in the tube shell 1, so that the heat exchange tubes 2 form a concentric circle shape. The spiral heat exchange tubes 2 are arranged in an array in the tube shell 1, so that the flow path of the liquid in the tube shell 1 is relatively dispersed and complex, thereby improving the disturbance and flow guidance effect of the liquid in the tube shell 1, avoiding the laminar flow of the liquid in the tube shell 1, and improving the heat exchange efficiency and heat exchange effect of the heat exchange tubes 2; When the heat exchanger is running, the liquid enters the tube shell 1 from the liquid inlet pipe 14, and then flows from the bottom to the top of the tube shell 1, and then is discharged from the liquid outlet pipe 13 on the tube shell 1. At the same time, the gas to be heat exchanged will enter the space surrounded by the upper head 11 from the air inlet pipe 15, and then the gas will pass through the heat exchange tube 2 and enter the space surrounded by the lower head 12. Finally, the gas after heat exchange will be discharged from the air outlet pipe 16. In this process, when the liquid enters the tube shell 1, the liquid will contact and impact the rotating ring 6 The blades 62 on the rotating ring 6 drive the rotating ring 6 and the blades 62 to rotate. At the same time, since the concentric circles formed by the rotating ring 6 and the heat exchange tube 2 are nested with each other, when the rotating ring 6 rotates, it drives the connecting rod 3 installed on the rotating ring 6 to perform a circular motion around the center line of the tube shell 1. During the circular motion, the connecting rod 3 scrapes and cleans the surface of each spiral heat exchange tube 2 through the cleaning sheet 31, thereby preventing the dirt in the liquid from accumulating and scaling on the surface of the heat exchange tube 2, thereby affecting the heat exchange performance of the heat exchange tube 2. At the same time, when the liquid in the shell 1 flows to the guide ring 23, the liquid will be guided by the guide ring 23, so that the liquid passes through the gap between the guide ring 23 and the heat exchange tube 2, promoting the liquid to pass near the surface of the heat exchange tube 2, accelerating the liquid flow rate near the surface of the heat exchange tube 2, and reducing the possibility of dirt adhering to the surface of the heat exchange tube 2, thereby ensuring the heat exchange effect of the heat exchange tube 2; At the same time, since the elastic rod 231 and the guide ring 23 are elastic, and the guide ring 23 is also provided with a slit, when the cleaning sheet 31 cleans the heat exchange tube 2, when the cleaning sheet 31 passes through the position of the guide ring 23, the guide ring 23 can be deformed, which facilitates the passage of the cleaning sheet 31 and avoids interference with the cleaning sheet 31. At the same time, the deformation of the guide ring 23 can also reduce the possibility of dirt adhering to the surface of the guide ring 23. At the same time, when the guide ring 23 on the heat exchange tube 2 is impacted by the liquid flow, the guide ring 23 will vibrate, thereby promoting the vibration of the heat exchange tube 2, further reducing the possibility of scale adhesion on the surface of the heat exchange tube 2, and ensuring the heat exchange effect and heat exchange efficiency of the heat exchange tube 2. At the same time, since the rotating ring 6 drives the connecting rod 3 and the cleaning piece 31 to perform a circular motion in the tube shell 1, the connecting rod 3 and the cleaning piece 31 further stir the liquid flow channels formed between the heat exchange tubes 2, thereby promoting the liquid in the tube shell 1 to become a turbulent state, thereby improving the heat exchange effect and heat exchange efficiency between the liquid and the heat exchange tube 2. At the same time, through the rotation of the connecting rod 3 and the cleaning piece 31, the liquid is stirred in the tube shell 1, so that the liquid in the tube shell 1 as a whole presents a spiral rotation trend, thereby improving the uniform distribution of the liquid in the tube shell 1, reducing the temperature difference between different areas in the tube shell 1, and improving the heat exchange effect of the heat exchanger. At the same time, through the stirring of the liquid by the connecting rod 3 and the cleaning piece 31, the liquid entering the liquid inlet pipe 14 is prevented from moving directly upward to the liquid outlet pipe 13 in the tube shell 1 and then being discharged from the liquid outlet pipe 13, thereby ensuring that the liquid entering the tube shell 1 is fully heat-exchanged before being discharged, thereby ensuring the heat exchange effect of the heat exchanger; At the same time, the cleaning sheet 31 is made of high-temperature resistant silicone wire, and the silicone wire is embedded with metal wire, so as to ensure the cleaning effect of the cleaning sheet 31 on the surface of the heat exchange tube 2. The metal wire can keep the silicone wire in its original shape as much as possible, so as to avoid deformation of the silicone wire during long-term use, which would affect the cleaning effect of the silicone wire on the heat exchange tube 2. At the same time, the isolation layer 8 installed on the inner wall of the tube shell 1 will isolate the liquid on its inner wall, reducing the corrosion of the tube shell 1 during long-term use. At the same time, due to the effect of the deformable layer 81, scale in the liquid will adhere to the deformable layer 81, preventing the scale from directly adhering to the inner wall of the tube shell 1 and being difficult to clean. At the same time, since an air cavity 82 is provided between the deformable layer 81 and the isolation layer 8, the deformable layer 81 will vibrate and shake slightly when impacted by the flow of liquid in the tube shell 1, increasing the difficulty of scale adhering to the deformable layer 81. At the same time, since the cross-section of the air cavity 82 is elliptical, when the liquid flows, an arc-shaped depression will appear at the position of the local air cavity 82 on the inner wall of the tube shell 1, causing the flowing liquid to generate turbulence and swirl, further cleaning the surface of the deformable layer 81 of this part, avoiding scale adhesion or cleaning the attached scale, thereby ensuring the cleanliness of the inner wall of the tube shell 1 and preventing scale adhesion from affecting the normal use of the heat exchanger.

[0020] As an embodiment of the present invention, the connecting rod 3 and the rotating ring 6 rotate relative to each other, and a contact ring 63 is installed on the lower tube plate 5. The cross section of the contact ring 63 is in an inverted L shape, and the upper end of the contact ring 63 is in contact with the connecting rod 3. The cleaning sheet 31 is in a spiral shape, and the spiral shape of the cleaning sheet 31 is opposite to the spiral shape of the heat exchange tube 2; Furthermore, when the blades 62 drive the rotating ring 6 and the connecting rod 3 to rotate, the end of the connecting rod 3 close to the rotating ring 6 contacts the upper end of the contact ring 63, thereby causing the connecting rod 3 to rotate relative to the rotating ring 6. That is, the rotating ring 6 drives the connecting rod 3 to rotate, and the connecting rod 3 rotates synchronously, so that the cleaning blades 31 can fully clean the surfaces of each heat exchange tube 2 in the tube shell 1. At the same time, the connection rod 3 rotates, so that when the connection rod 3 cleans the surface of the heat exchange tube 2 in the process of circular motion, the part of the cleaning sheet 31 that contacts the heat exchange tube 2 will change, thereby avoiding local wear or deformation of the cleaning sheet 31, which would affect the cleaning effect of the cleaning sheet 31 on the heat exchange tube 2. Since the spiral directions of the heat exchange tube 2 and the cleaning sheet 31 are opposite, when the cleaning sheet 31 rotates with the connection rod 3, the contact area between the cleaning sheet 31 and the heat exchange tube 2 increases, thereby improving the cleaning effect of the heat exchange tube 2. At the same time, when the cleaning piece 31 rotates, the spiral-shaped cleaning piece 31 will produce a stirring effect on the liquid in the tube shell 1, and through its own spiral shape, it will produce a downward pushing effect on the liquid in the tube shell 1, thereby cooperating with the trend of the liquid in the tube shell 1 to flow from bottom to top, which will further disperse and turbulent the liquid in the tube shell 1, thereby improving the heat exchange effect between the heat exchange tube 2 and the liquid. At the same time, it will also increase the flow rate of the liquid in the tube shell 1, thereby improving the heat exchange time and heat exchange effect of the liquid in the tube shell 1.

[0021] As an embodiment of the present invention, there is an angle between the center lines of the liquid inlet pipe 14 and the liquid outlet pipe 13 and the diameter of the tube shell 1; By setting the installation angles of the liquid inlet pipe 14 and the liquid outlet pipe 13, the liquid entering the tube shell 1 from the liquid inlet pipe 14 does not point to the center line of the tube shell 1, and the outlet direction of the liquid outlet pipe 13 does not point to the center line of the tube shell 1, thereby promoting the liquid entering the tube shell 1 and the liquid to be discharged from the tube shell 1 to have a rotation tendency, increasing the uniformity of the liquid distribution in the tube shell 1 and the degree of liquid turbulence, and further improving the heat exchange efficiency and heat exchange effect of the heat exchanger; At the same time, by causing the liquid entering the tube shell 1 to have a rotating tendency, the blades 62 are better impacted by the flow of the liquid, thereby promoting the rotation of the blades 62 and driving the rotating ring 6 and the connecting rod 3 to perform circular motion in the tube shell 1, ensuring the cleaning of the surface of the heat exchange tube 2 and the disturbance of the liquid in the tube shell 1.

[0022] As an embodiment of the present invention, a transmission roller 7 is installed on the upper tube plate 4, and a protruding edge is provided at the edge of the rotating ring 6 on the upper tube plate 4, and the transmission roller 7 and the protruding edge are in contact with each other; A meshing layer 71 is installed on the portion of the driving roller 7 that contacts the protruding edge. A gear-shaped groove is provided on the protruding edge. The meshing layer 71 cooperates with the gear-shaped groove. The meshing layer 71 is made of elastic material. Since both ends of the transmission roller 7 contact the protruding edges of the two adjacent rotating rings 6 respectively, when one rotating ring 6 rotates, the transmission roller 7 is driven to rotate by the friction between the transmission roller 7 and the rotating ring 6, which in turn drives the other adjacent rotating ring 6 to rotate synchronously. That is, through the action of the transmission roller 7, the rotating rings 6 are linked to each other and rotate synchronously. At the same time, by providing a protruding edge at the edge of the rotating ring 6 on the upper tube plate 4 and making the transmission roller 7 contact the protruding edge, interference between the transmission roller 7 and the connecting rod 3 and the blade 62 is avoided, ensuring that the rotating ring 6 can rotate normally; At the same time, through the cooperation between the meshing layer 71 made of elastic material and the gear-shaped groove, a face gear transmission structure is formed between the transmission roller 7 and the protruding edge, thereby improving the transmission effect between the transmission roller 7 and the rotating ring 6 and avoiding slipping between the transmission roller 7 and the rotating ring 6. At the same time, the meshing layer 71 is made of elastic material, which reduces the mutual friction between the transmission roller 7 and the protruding edge, avoiding excessive wear between the two, affecting the normal use of the heat exchanger and the cleaning effect of dirt in the heat exchanger.

[0023] As an embodiment of the present invention, the transmission roller 7 is provided with an axial through hole, and the transmission roller 7 is evenly arranged in multiple groups along the circumferential direction of the tube shell 1; By utilizing the driving roller 7 and the axial through-holes, the circular spaces enclosed by the heat exchange tubes 2 are interconnected. In conjunction with the tendency of the liquid to be discharged from the liquid outlet pipe 13, when the liquid near the liquid outlet pipe 13 flows, the liquid will produce a suction and communication effect through the through-holes, thereby promoting a radial flow trend of the liquid in the tube shell 1, thereby promoting the disturbance effect of the liquid in the tube shell 1, making the shell in a turbulent state, and improving the heat exchange effect and heat exchange efficiency between the liquid and the heat exchange tubes 2.

[0024] As an embodiment of the present invention, the cleaning piece 31 on the connecting rod 3 contacts the inner wall of the tube shell 1, and the corresponding position of the air cavity 82 on the deformation layer 81 contacts the cleaning piece 31 and deforms; By installing the rotating ring 6 between the inner wall of the tube shell 1 and the outermost layer of the heat exchange tube 2, and installing the rotating ring 6 between two adjacent layers of heat exchange tubes 2, when the rotating ring 6 drives the connecting rod 3 to rotate, the cleaning piece 31 on the connecting rod 3 can fully contact the surface of the heat exchange tube 2 and clean the surface of the heat exchange tube 2, thereby preventing one side of the heat exchange tube 2 from being cleaned after contacting the cleaning piece 31 while the other side of the heat exchange tube 2 cannot contact the cleaning piece 31, thereby affecting the cleaning effect of the surface of the heat exchange tube 2; At the same time, when the rotating ring 6 close to the inner wall of the tube shell 1 rotates, the connecting rod 3 and the cleaning sheet 31 on the rotating ring 6 clean the surface of the heat exchange tube 2, and the cleaning sheet 31 also scrapes and cleans the inside of the tube shell 1 in contact, so as to keep the inner wall of the tube shell 1 and the outer surface of the heat exchange tube 2 clean, reduce the accumulation and scaling of dirt on the inner wall of the tube shell 1 and the outer surface of the heat exchange tube 2, and avoid affecting the heat exchange effect and heat exchange efficiency of the heat exchanger; At the same time, due to the good elasticity of the deformable layer 81 and the air cavity 82 provided between the deformable layer 81 and the isolation layer 8, when the cleaning sheet 31 near the inner wall of the tube shell 1 sweeps across the deformable layer 81 corresponding to the air cavity 82, the deformable layer 81 in this part will deform, vibrate or shake, further increasing the difficulty of scale adhering to the deformable layer 81, and will clean the scale already attached to the deformable layer 81, thereby avoiding scaling on the inner wall of the tube shell 1 and affecting the heat exchange effect and efficiency of the heat exchanger.

[0025] As an embodiment of the present invention, the heat exchange tube 2 includes a main tube 21 and a reinforcement tube 22. The main tube 21 and the reinforcement tube 22 share an outlet and an inlet. The strength of the reinforcement tube 22 is greater than that of the main tube 21. The thermal conductivity of the main tube 21 is better than that of the reinforcement tube 22. The main pipe 21 and the reinforcement pipe 22 are spirally wound together. The thickness of the main pipe 21 is smaller than that of the reinforcement pipe 22. A silicone gasket is installed between the main pipe 21 and the reinforcement pipe. Since the heat exchange tube 2 is made of copper tube, and the strength of copper tube is relatively low, the copper tube is prone to vibration, deformation, bending or even breaking when impacted by the flow of liquid in the tube shell 1, which will affect the normal use of the heat exchanger and create a safety hazard. Therefore, a stainless steel tube is used as the reinforcement tube 22 and a copper tube is used as the main tube 21. The two are spirally wound together, so that the reinforcement tube 22 is used to limit and support the copper tube, thereby improving the strength of the heat exchange tube 2 and preventing the heat exchange tube 2 from bending and deformation when the liquid flows into the heat exchange tube 2. At the same time, the thickness of the main pipe 21 is reduced, thereby improving the heat exchange effect and heat exchange efficiency of the main pipe 21 part of the heat exchange tube 2, and preventing the reinforcement pipe 22 with relatively poor thermal conductivity from affecting the heat exchange performance of the heat exchange tube 2 composed of the two. At the same time, since the strength of the reinforcement pipe 22 is greater than that of the main pipe 21, the reinforcement pipe 22 provides most of the strength to the heat exchange tube 2. Therefore, reducing the thickness of the main pipe 21 will not affect the strength of the heat exchange tube 2 and affect the normal use of the heat exchanger. At the same time, by installing a high-strength silicone gasket between the main pipe 21 and the reinforcement pipe 22, the silicone gasket is further used to limit and support the main pipe 21, thereby improving the stability and strength of the heat exchange pipe 2. At the same time, it can also prevent the main pipe 21 with lower strength from frequently contacting the reinforcement pipe 22 when vibrating, causing wear and damage between the main pipe 21 and the reinforcement pipe 22, thereby affecting the normal use of the heat exchanger; At the same time, since the guide ring 23 is installed on the heat exchange tube 2, the liquid flow guided and directed by the guide ring 23 will impact the gap formed by the spiral winding between the main pipe 21 and the reinforcement pipe 22, thereby improving the flow of liquid near the heat exchange tube 2 and reducing the possibility of reduced flow velocity and dirt accumulation in the gap between the main pipe 21 and the reinforcement pipe 22, thereby further improving the heat exchange effect and heat exchange efficiency of the heat exchange tube 2.

[0026] A method for installing a single-stream wound tube heat exchanger with tubes, the method being applicable to any of the above-mentioned single-stream wound tube heat exchangers with tubes, the method comprising the following steps: S1: spirally wind the main pipe 21 and the reinforcement pipe 22 of the same shape, and process the outlets and inlets at both ends so that they share the same set of outlets and inlets to obtain a complete heat exchange pipe 2; S2: Fix the mounting ring 61 and the rotating ring 6 to the tube sheet, then install one of the tube sheets into the tube shell 1. Then, install the heat exchange tubes 2 and the connecting rods 3 layer by layer from the inside to the outside along the radial direction of the tube shell 1. Finally, install the other tube sheet onto the tube shell 1. S3: Install the air inlet pipe 15 and the air outlet pipe 16 onto the two heads respectively, and install the liquid inlet pipe 14 and the liquid outlet pipe 13 onto the two ends of the tube shell 1 respectively. Finally, install the two heads onto the tube shell 1 to complete the installation of the heat exchanger.

[0027] The specific workflow is as follows: The spiral heat exchange tubes 2 are evenly installed in the tube shell 1 so that the heat exchange tubes 2 form concentric circles, and the spiral heat exchange tubes 2 are arranged in an array in the tube shell 1; When the heat exchanger is running, the liquid enters the tube shell 1 from the liquid inlet pipe 14, and then the liquid will flow from the bottom to the top of the tube shell 1, and then be discharged from the liquid outlet pipe 13 on the tube shell 1. At the same time, the gas to be heat exchanged will enter the space surrounded by the upper head 11 from the air inlet pipe 15, and then the gas will pass through the heat exchange tube 2 and enter the space surrounded by the lower head 12. Finally, the gas after heat exchange will be discharged from the air outlet pipe 16. During this process, when the liquid enters the tube shell 1, the liquid will contact and impact the blades 62 on the rotating ring 6, thereby driving the rotating ring 6 and the blades 62 to rotate, and driving the connecting rod 3 installed on the rotating ring 6 to perform a circular motion around the center line of the tube shell 1, so that the connecting rod 3 will scrape and clean the surface of each spiral heat exchange tube 2 through the cleaning sheet 31 during the circular motion; At the same time, the rotating ring 6 drives the connecting rod 3 and the cleaning sheet 31 to perform a circular motion in the tube shell 1, so that the connecting rod 3 and the cleaning sheet 31 further stir the liquid flow channels formed between the heat exchange tubes 2, promoting the liquid in the tube shell 1 to become a turbulent state. At the same time, the liquid in the tube shell 1 as a whole tends to rotate in a spiral manner. Meanwhile, the cleaning sheet 31 is made of high temperature resistant silicone wire, in which metal wire is embedded; When the blade 62 drives the rotating ring 6 and the connecting rod 3 to rotate, the end of the connecting rod 3 close to the rotating ring 6 contacts the upper end of the contact ring 63, thereby causing the connecting rod 3 to rotate relative to the rotating ring 6. That is, the rotating ring 6 drives the connecting rod 3 to rotate, and the connecting rod 3 rotates synchronously. At the same time, through the rotation of the connecting rod 3, when the connecting rod 3 cleans the surface of the heat exchange tube 2 during the circular motion, the part of the cleaning sheet 31 that contacts the heat exchange tube 2 will change; At the same time, when the cleaning piece 31 rotates, the spiral-shaped cleaning piece 31 will stir the liquid in the tube shell 1, and through its own spiral shape, it will produce a downward pushing effect on the liquid in the tube shell 1; By setting the installation angles of the liquid inlet pipe 14 and the liquid outlet pipe 13, the liquid entering the tube shell 1 from the liquid inlet pipe 14 and the outlet direction of the liquid outlet pipe 13 are not directed to the center line of the tube shell 1, so that the liquid entering the tube shell 1 and the liquid to be discharged from the tube shell 1 have a tendency to rotate; At the same time, by making the liquid entering the tube shell 1 have a tendency to rotate, the blades 62 are better impacted by the flow of the liquid; Since both ends of the transmission roller 7 contact the protruding edges of the two adjacent rotating rings 6 respectively, when one rotating ring 6 rotates, the transmission roller 7 is driven to rotate by the friction between the transmission roller 7 and the rotating ring 6, which in turn drives the other adjacent rotating ring 6 to rotate synchronously. That is, through the action of the transmission roller 7, the rotating rings 6 are linked to each other and rotate synchronously. At the same time, by providing a protruding edge at the edge of the rotating ring 6 on the upper tube plate 4 and making the transmission roller 7 contact the protruding edge, interference between the transmission roller 7 and the connecting rod 3 and the blade 62 is avoided; At the same time, through the cooperation between the meshing layer 71 made of elastic material and the gear-shaped groove, a face gear transmission structure is formed between the transmission roller 7 and the protruding edge, thereby improving the transmission effect between the transmission roller 7 and the rotating ring 6 and preventing slippage between the transmission roller 7 and the rotating ring 6; The circular spaces enclosed by the heat exchange tubes 2 are interconnected by the driving rollers 7 and the axial through-holes. As the liquid is discharged from the liquid outlet pipe 13, when the liquid near the liquid outlet pipe 13 flows, the liquid is sucked and connected through the through-holes, thereby promoting a radial flow trend of the liquid in the tube shell 1. By installing a rotating ring 6 between the inner wall of the tube shell 1 and the outermost layer of the heat exchange tube 2, and installing a rotating ring 6 between two adjacent layers of heat exchange tubes 2, when the rotating ring 6 drives the connecting rod 3 to rotate, the cleaning piece 31 on the connecting rod 3 can fully contact the surface of the heat exchange tube 2 and clean the surface of the heat exchange tube 2; At the same time, the cleaning sheet 31 will also scrape and clean the inside of the tube shell 1 it contacts, keeping the inner wall of the tube shell 1 and the outer surface of the heat exchange tube 2 clean; Use a stainless steel tube as the reinforcement tube 22 and a copper tube as the main tube 21, and spirally wrap the two together, so that the reinforcement tube 22 can limit and support the copper tube, thereby improving the strength of the heat exchange tube 2; At the same time, the thickness of the main pipe 21 is reduced, thereby improving the heat exchange effect and heat exchange efficiency of the main pipe 21 part of the heat exchange tube 2. At the same time, since the strength of the reinforcement pipe 22 is greater than the strength of the main pipe 21, the reinforcement pipe 22 provides most of the strength to the heat exchange tube 2. Therefore, reducing the thickness of the main pipe 21 will not affect the strength of the heat exchange tube 2. At the same time, by installing a high silicone gasket between the main pipe 21 and the reinforcement pipe 22, the silicone gasket is further used to limit and support the main pipe 21.

[0028] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A single-stream wound tube heat exchanger with tube arrays, comprising a tube shell (1), an upper head (11) and a lower head (12) being installed at both ends of the tube shell (1), an air inlet pipe (15) being installed on the upper head (11), an air outlet pipe (16) being installed on the lower head (12), a liquid outlet pipe (13) being installed at the upper end of the tube shell (1), and a liquid inlet pipe (14) being installed at the lower end of the tube shell (1); An upper tube sheet (4) and a lower tube sheet (5) are installed at both ends of the tube shell (1), and a heat exchange tube (2) is installed between the upper tube sheet (4) and the lower tube sheet (5); Its characteristics are: The heat exchange tube (2) is surrounded by a plurality of concentric circles within the tube shell (1); a guide ring (23) is provided on the surface of the heat exchange tube (2); the guide ring (23) is connected to the heat exchange tube (2) via an elastic rod (231); a radial gap (232) is provided on the guide ring (23); the guide ring (23) is made of an elastic material, and a gap exists between the guide ring (23) and the heat exchange tube (2); Mounting rings (61) are correspondingly mounted on the opposing surfaces of the upper tube plate (4) and the lower tube plate (5), a rotating ring (6) is mounted on the mounting ring (61), a connecting rod (3) is mounted on the rotating ring (6), a cleaning sheet (31) is mounted on the connecting rod (3), and the cleaning sheet (31) is in contact with the heat exchange tube (2); The rotating ring (6) is provided with blades (62), and the outlets of the liquid inlet pipe (14) and the liquid outlet pipe (13) are aligned with the blades (62); An isolation layer (8) is installed on the inner wall of the tube shell (1), a deformation layer (81) is installed on the isolation layer (8), the elasticity of the deformation layer (81) is greater than the elasticity of the isolation layer (8), an air cavity (82) is evenly arranged between the deformation layer (81) and the isolation layer (8), and the cross-section of the deformation cavity (82) is elliptical.

2. A single-stream wound tube heat exchanger with tubes according to claim 1, characterized in that: There is relative rotation between the connecting rod (3) and the rotating ring (6); a contact ring (63) is installed on the lower tube plate (5); the cross section of the contact ring (63) is in an inverted L shape; the upper end of the contact ring (63) is in contact with the connecting rod (3); The cleaning sheet (31) is in a spiral shape, and the spiral shape of the cleaning sheet (31) is opposite to the spiral shape of the heat exchange tube (2).

3. The single-stream wound tube heat exchanger with tube arrays according to claim 1, characterized in that: There is an angle between the center lines of the liquid inlet pipe (14) and the liquid outlet pipe (13) and the diameter of the tube shell (1).

4. The single-stream wound tube heat exchanger with tube arrays according to claim 1, characterized in that: A transmission roller (7) is installed on the upper tube plate (4), and a protruding edge is provided at the edge of the rotating ring (6) on the upper tube plate (4), and the transmission roller (7) and the protruding edge are in contact with each other; A meshing layer (71) is installed on the portion of the transmission roller (7) that contacts the protruding edge, a gear-shaped groove is provided on the protruding edge, the meshing layer (71) and the gear-shaped groove cooperate with each other, and the meshing layer (71) is made of elastic material.

5. The single-stream wound tube heat exchanger with tube arrays according to claim 4, characterized in that: The transmission roller (7) is provided with an axial through hole, and a plurality of transmission rollers (7) are evenly arranged along the circumferential direction of the tube shell (1).

6. The single-stream wound tube heat exchanger with tube arrays according to claim 1, characterized in that: The cleaning piece (31) on the connecting rod (3) contacts the inner wall of the tube shell (1), and the corresponding position of the air cavity (82) on the deformation layer (81) contacts the cleaning piece (31) and deforms.

7. The single-stream wound tube heat exchanger with tube arrays according to claim 1, characterized in that: The heat exchange tube (2) comprises a main tube (21) and a reinforcement tube (22); the main tube (21) and the reinforcement tube (22) share an outlet and an inlet; the strength of the reinforcement tube (22) is greater than that of the main tube (21); and the thermal conductivity of the main tube (21) is better than that of the reinforcement tube (22); The main pipe (21) and the reinforcement pipe (22) are spirally wound together, the thickness of the main pipe (21) is smaller than the thickness of the reinforcement pipe (22), and a silicone gasket is installed between the main pipe (21) and the reinforcement pipe.

8. A method for installing a single-stream wound tube heat exchanger with tube arrays, characterized in that: The installation method is applicable to a single-stream wound tube heat exchanger with tubes according to any one of claims 1 to 7, and the installation method comprises the following steps: S1: spirally winding the main pipe (21) and the reinforcement pipe (22) of the same shape, and processing the outlets and inlets at both ends so that the two share the same set of outlets and inlets, thereby obtaining a complete heat exchange pipe (2); S2: The mounting ring (61) and the rotating ring (6) are fixedly mounted on the tube sheet, and one of the tube sheets is mounted on the tube shell (1). Thereafter, the heat exchange tubes (2) and the connecting rods (3) are sequentially mounted layer by layer from the inside to the outside along the radial direction of the tube shell (1). Finally, the other tube sheet is mounted on the tube shell (1); S3: Install the air inlet pipe (15) and the air outlet pipe (16) on the two heads respectively, and install the liquid inlet pipe (14) and the liquid outlet pipe (13) on the two ends of the tube shell (1) respectively. Finally, install the two heads on the tube shell (1), thereby completing the installation of the heat exchanger.

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