Synchronous twisted integrated jacket heat exchanger and manufacturing method thereof

Abstract

The application belongs to the technical field of heat exchangers, and particularly relates to a synchronous distortion type integrated double-pipe heat exchanger and a manufacturing method thereof. The heat exchanger comprises an outer pipe, an inner pipe and a disturbance belt. The inner pipe is arranged in the outer pipe, the outer diameter of the inner pipe is smaller than the inner diameter of the outer pipe, the gap between the outer pipe and the inner pipe is a first flow channel for flowing liquid, and the lumen of the inner pipe is a second flow channel for flowing another liquid. The disturbance belt is arranged in the first flow channel and the second flow channel, and is used for disturbing the liquid. The technical problem of limited heat exchange performance caused by low heat exchange degree of fluid in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat exchangers, and more particularly to a synchronous twist type integrated double-pipe heat exchanger and a manufacturing method thereof. BACKGROUND

[0002] A heat exchanger can realize heat exchange between cold and hot fluids, and has important applications in the fields of petroleum, chemical industry, energy power and aerospace. Common types of heat exchangers include double-pipe heat exchangers, shell-and-tube heat exchangers and plate heat exchangers. Among them, the double-pipe heat exchanger is the simplest structure and is widely used.

[0003] The double-pipe heat exchanger is to put two different pipe diameters of circular pipes together to form a concentric double pipe. The inner pipe passage is called the tube side, and the annular gap between the inner and outer pipes is called the shell side. Cold fluid and hot fluid two media flow in the tube side or shell side at the same time, so as to achieve the effect of heat exchange. In the double-pipe heat exchanger, the pipe is generally a light pipe, and the fluid in the center of the pipe or far from the heat exchange surface hardly participates in heat exchange, and the performance is greatly limited. SUMMARY

[0004] The purpose of the present application is to provide a synchronous twist type integrated double-pipe heat exchanger and a manufacturing method thereof, which solves the technical problem of limited heat exchange performance caused by low degree of fluid participating in heat exchange in the prior art.

[0005] To achieve the above purpose, the technical solution adopted by the present application is:

[0006] In a first aspect, a synchronous twist type integrated double-pipe heat exchanger is provided, comprising:

[0007] an outer pipe;

[0008] an inner pipe, the inner pipe is arranged in the outer pipe, the outer diameter of the inner pipe is smaller than the inner diameter of the outer pipe, the gap between the outer pipe and the inner pipe is a first flow channel for flowing fluid, and the lumen of the inner pipe is a second flow channel for flowing another fluid; and

[0009] a turbulence belt, the turbulence belt is arranged in the first flow channel and the second flow channel, and the turbulence belt is used for disturbing the fluid.

[0010] In one embodiment of the first aspect, the turbulence belt includes an inner twist belt arranged in the inner pipe, the inner twist belt extends along the length direction of the inner pipe, and the inner twist belt is twisted in the circumferential direction of the inner pipe.

[0011] In one embodiment of the first aspect, the inner twisted tape has a single-bar shape or a multi-bar shape in a cross section perpendicular to the length direction, the single-bar shape is a straight bar, the multi-bar shape has multiple bars connected at the same end, the multiple bars diverge radially and the included angle between any two adjacent bars is equal, the number of bars in the multi-bar shape is greater than two, and the lengths of the multiple bars are equal.

[0012] In one embodiment of the first aspect, the twisted tape further comprises an outer twisted tape in the shape of a strip arranged in the first flow channel, the outer twisted tape twists and extends around the inner tube in a spiral form along the length direction of the inner tube.

[0013] In one embodiment of the first aspect, if the cross section of the inner twisted tape is a single-bar shape, the outer twisted tape has two bars, and the two bars are aligned in the radial direction and twist synchronously with the two sides of the inner twisted tape, respectively.

[0014] If the cross section of the inner twisted tape is a multi-bar shape, the number of the outer twisted tapes is equal to the number of bars in the cross section of the inner twisted tape, and the multiple outer twisted tapes are aligned in the radial direction and twist synchronously with the multiple twisted pieces of the inner twisted tape, respectively.

[0015] In one embodiment of the first aspect, the twisting rates of the inner twisted tape and the outer twisted tape are equal, and the twisting rate is the ratio of the length of the twisted tape after twisting by 180 degrees in the axial direction to the diameter of the inner tube.

[0016] In one embodiment of the first aspect, the synchronous twisted integrated double-pipe heat exchanger further comprises a first inlet section connected to the first flow channel, a second inlet section connected to the second flow channel, a first outlet section connected to the other side of the first flow channel, and a second outlet section connected to the other side of the second flow channel, and the flow directions of the fluids in the first flow channel and the second flow channel are opposite.

[0017] In one embodiment of the first aspect,

[0018] The first inlet section and the first flow channel are connected by a first transition section, and the first outlet section and the first flow channel are connected by a second transition section.

[0019] The second inlet section and the second flow channel are connected by a third transition section, and the second outlet section and the second flow channel are connected by a fourth transition section.

[0020] In a second aspect, the application further provides a manufacturing method of a synchronous twisted integrated double-pipe heat exchanger, comprising the following steps:

[0021] Designing the structure of the heat exchanger;

[0022] determine a processing parameter, select a metal additive manufacturing technology for manufacturing, the metal additive manufacturing technology is one of a laser powder bed fusion technology, an electron beam powder bed fusion technology, and a laser deposition manufacturing technology, and the processing parameter includes a printing material and a printing direction;

[0023] perform a finishing process after printing is completed.

[0024] In one of the embodiments of the second aspect, the heat exchanger is designed as follows:

[0025] design an inner tube, including a diameter, a wall thickness, and a length of the inner tube;

[0026] design an inner twisted tape, including a shape and a twist rate of the twisted tape;

[0027] design an outer tube, including a diameter, a wall thickness, and a length of the outer tube, and the length of the outer tube is equal to the length of the inner tube;

[0028] design an outer twisted tape, including a shape and a twist rate of the twisted tape, and the twist rate of the outer twisted tape is the same as that of the inner twisted tape;

[0029] design a first transition section and a second transition section, and connect the first transition section and the second transition section at corresponding flow channels;

[0030] design a first inlet section, a first outlet section, a second inlet section, and a second outlet section, and connect the first inlet section, the first outlet section, the second inlet section, and the second outlet section at corresponding transition sections;

[0031] the printing material is one or more of stainless steel, titanium alloy, aluminum alloy, and copper alloy;

[0032] the printing direction is an axial direction of the heat exchanger;

[0033] the finishing process includes removing powder in the heat exchanger, cutting and taking down the printed heat exchanger, and thread processing.

[0034] Compared with the prior art, the synchronous twisted integrated double-pipe heat exchanger provided in the application is provided with a twisted tape in the lumen of the inner tube, i.e., in the second flow channel, and in the gap between the outer tube and the inner tube, i.e., in the first flow channel. When the flow passes through the first flow channel and the second flow channel, the flow is disturbed under the action of the twisted tape, and intense turbulent flow is caused, so that more flow participates in heat exchange, the heat exchange effect is effectively enhanced, and the heat exchange performance is improved. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0036] Figure 1 The structure schematic diagram of the synchronous twist integrated double-pipe heat exchanger provided by the embodiment of the present application is shown in the following figure, wherein the cross section of the inner twist belt is a straight line.

[0037] Figure 2 The structure schematic diagram of the synchronous twist integrated double-pipe heat exchanger provided by the embodiment of the present application is shown in the following figure, wherein the cross section of the inner twist belt is a straight line. Figure 1 The axial section structure schematic diagram is shown in the following figure.

[0038] Figure 3 The structure schematic diagram of the synchronous twist integrated double-pipe heat exchanger provided by the embodiment of the present application is shown in the following figure, wherein the cross section of the inner twist belt is a straight line. Figure 1 The internal structure schematic diagram of the outer pipe and the inner pipe is shown in the following figure.

[0039] Figure 4 The structure schematic diagram of the synchronous twist integrated double-pipe heat exchanger provided by the embodiment of the present application is shown in the following figure, wherein the cross section of the inner twist belt is a straight line. Figure 3 The enlarged structure schematic diagram at point C is shown in the following figure.

[0040] Figure 5 The internal structure schematic diagram of the outer pipe and the inner pipe when the inner twist belt is a triangle provided by another embodiment of the present application is shown in the following figure.

[0041] Figure 6 The structure schematic diagram of the synchronous twist integrated double-pipe heat exchanger provided by the embodiment of the present application is shown in the following figure, wherein the cross section of the inner twist belt is a straight line. Figure 5 The enlarged structure schematic diagram at point A is shown in the following figure.

[0042] Figure 7 The internal structure schematic diagram of the outer pipe and the inner pipe when the inner twist belt is a cross provided by another embodiment of the present application is shown in the following figure.

[0043] Figure 8 The structure schematic diagram of the synchronous twist integrated double-pipe heat exchanger provided by the embodiment of the present application is shown in the following figure, wherein the cross section of the inner twist belt is a straight line. Figure 7 The enlarged structure schematic diagram at point B is shown in the following figure.

[0044] Figure 9 The flow chart of the manufacturing method of the synchronous twist integrated double-pipe heat exchanger provided by the embodiment of the present application is shown in the following figure.

[0045] In the figure, 1, outer pipe; 2, inner pipe; 3, outer twist belt; 4, inner twist belt; 5, first inlet section; 6, second inlet section; 7, first outlet section; 8, second outlet section; 9, first transition section; 10, second transition section. DETAILED DESCRIPTION

[0046] In order to make the technical problems, technical solutions and beneficial effects of the present application more clearly understood, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0047] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0048] In addition, the terms "first", "second", "third", etc. are used herein only to describe different instances, and are not used to indicate or imply relative importance or a number of indicated technical features. Thus, features defined with "first", "second", "third" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0049] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0050] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0051] Please refer to Figure 1 and Figure 2 The present application provides a specific embodiment of a synchronous distortion integrated double-pipe heat exchanger, which comprises an outer pipe 1, an inner pipe 2 and a turbulence belt.

[0052] The outer pipe 1 in the embodiment is located outside, and the inner pipe 2 is arranged in the outer pipe 1.

[0053] The outer diameter of the inner pipe 2 is smaller than the inner diameter of the outer pipe 1, and the gap between the outer pipe 1 and the inner pipe 2 is a first flow channel for flowing a flow medium, and the lumen of the inner pipe 2 is a second flow channel for flowing another flow medium.

[0054] Specifically, the flow media in the two flow channels are flow media with temperature difference, the first flow channel can be hot flow medium, and the second flow channel can be cold flow medium, and in the process of flowing of the two, heat exchange is carried out through the pipe wall of the inner pipe 2 to achieve the effect of heat exchange. The flow directions of the two flow media are opposite, which enhances the heat exchange effect.

[0055] The turbulence belt in the embodiment is arranged in the first flow channel and the second flow channel, and is used for disturbing the flow.

[0056] Specifically, when the flow flows in the flow channel, the flow collides on the turbulence belt and is disturbed, so that the flow can contact the wall of the inner tube 2, and the heat exchange effect is enhanced.

[0057] The heat exchanger provided in the embodiment is provided with the turbulence belt in the lumen of the inner tube 2, i.e. the second flow channel, and in the gap between the outer tube 1 and the inner tube 2, i.e. the first flow channel. When the flow flows through the first flow channel and the second flow channel, the flow is disturbed under the action of the turbulence belt, and intense turbulence is caused, so that more flow participates in heat exchange, the heat exchange effect is effectively enhanced, and the heat exchange performance is improved.

[0058] As Figure 2 and Figure 3 In the embodiment, the turbulence belt at least includes an inner turbulence belt 4 arranged in the inner tube 2 and used for disturbing the flow in the inner tube 2. The inner turbulence belt 4 extends along the length direction of the inner tube 2, and is twisted in the circumferential direction of the inner tube 2.

[0059] The structure of the inner turbulence belt 4 is as follows. The inner turbulence belt 4 is in a strip shape, and the length of the inner turbulence belt 4 can be equal to the length of the inner tube 2. The inner turbulence belt 4 is twisted and arranged in the inner tube 2 in a twisted state. The outer edge of the inner turbulence belt 4 in the twisted state can abut against the inner wall of the inner tube 2. When the flow flows in the inner tube 2, the inner turbulence belt 4 in the twisted state can disturb the flow to a certain extent, and the flow not only flows in the axial direction, but also flows in the radial direction and generates vortex, so that intense turbulence is caused, and the heat conduction is effectively enhanced.

[0060] The specific structure of the inner turbulence belt 4 provided in the application can be as follows. The inner turbulence belt 4 is in a strip shape. The cross section of the inner turbulence belt 4 perpendicular to the length direction is in a single-rod shape or a multi-rod shape. The single-rod shape is in a straight line shape. The multi-rod shape is that a plurality of rods are connected at one end. The plurality of rods are distributed in the radial direction in the same plane, and the included angle between any two adjacent rods is equal. The number of rods in the multi-rod shape is greater than two, and the lengths of the plurality of rods are equal.

[0061] As Figure 3 and Figure 4 In the embodiment, the cross section of the inner turbulence belt 4 can be in a single-rod shape, i.e. a straight line shape. When the inner turbulence belt 4 is stretched, the inner turbulence belt 4 is in a rectangular shape.

[0062] The cross section of the inner turbulence belt 4 can also be in a multi-rod shape, i.e. a plurality of rods. The plurality of rods are distributed in the same plane. One end of the plurality of rods is connected together, and the other end is distributed in the radial direction and is uniformly distributed in the circumferential direction, i.e. the included angle between any two adjacent rods is equal.

[0063] It should be noted that the single rod shape can also be understood as having two rods, the two rods being connected at the same end and diverging at the other end, and the included angle between the two rods being 180 degrees.

[0064] Specifically, the number of rod bodies of the multi-rod shape is greater than two.

[0065] For example, Figure 5 and Figure 6 In another embodiment, the number of rod bodies can be three, forming a triangle.

[0066] For example, Figure 7 and Figure 8 In yet another embodiment, the number of rod bodies can also be four, forming a cross shape.

[0067] Therefore, the inner twist belt 4 provided in the present application can be a single shape, a triangle or a cross shape, and the number of rod bodies can also be more than four, forming a polygon.

[0068] When the cross section is a multi-rod shape, each rod corresponds to a twist piece, and the single-shaped inner twist belt 4 corresponds to two twist pieces.

[0069] In this way, when the inner twist belt 4 rotates and twists around itself, each twist piece twists correspondingly, forming a spiral distribution and extension, and the fluid flows between the two twist pieces along the spiral track, which is equivalent to axial flow and radial flow, and can generate better disturbance effect, thereby enhancing the heat transfer effect.

[0070] The more the number of twist pieces of the inner twist belt 4, the more dispersed the fluid, the more divided, and the better the heat exchange effect.

[0071] For example, Figure 3 and Figure 4 Further, the present embodiment includes an outer twist belt 3 in addition to the inner twist belt 4, the outer twist belt 3 is arranged in the first flow channel, and the flow disturbance belt further includes a strip-shaped outer twist belt 3 arranged in the first flow channel, the outer twist belt 3 extends around the inner tube 2 in a spiral form along the length direction of the inner tube 2.

[0072] Specifically, the cross section of the outer twist belt 3 can be a single shape, the outer twist belt 3 is arranged in such a way that the outer twist belt 3 is wound on the outer wall of the inner tube 2 in a spiral form and extends along the length direction of the inner tube 2, and the two sides of the outer twist belt 3 can abut against the outer wall of the inner tube 2 and the inner wall of the outer tube 1, respectively.

[0073] The present embodiment provides an outer twist belt 3, which disturbs the flow in the first flow channel, so that the fluid in the first flow channel alternately contacts the outer wall of the inner tube 2, thereby achieving a more excellent heat exchange effect.

[0074] It should be noted that the inner tube 2, the outer tube 1, the inner twisted belt 4 and the outer twisted belt 3 are integrated structures without welding or other connections, have good sealing performance and higher working reliability.

[0075] The application also adopts the form of synchronous twisting of the outer twisted belt 3 and the inner twisted belt 4, which can further enhance the heat exchange effect. In order to realize synchronous twisting, the outer twisted belt 3 and the inner twisted belt 4 in the application are correspondingly arranged as follows:

[0076] In the embodiment, as shown in Figure 3 and Figure 4 , the cross section of the inner twisted belt 4 is single-rod-shaped, and the outer twisted belt 3 is two, and the two outer twisted belts 3 are respectively aligned with the two sides of the twisted sheet of the inner twisted belt 4 in the radial direction and are synchronously twisted.

[0077] In another two embodiments, as shown in Figure 5 and Figure 6 , the cross section of the inner twisted belt 4 is triangular, as shown in Figure 7 and Figure 8 , the cross section of the inner twisted belt 4 is cross-shaped, and the cross section of the inner twisted belt 4 is multi-rod-shaped, and the number of the outer twisted belts 3 is the same as the number of the rods of the cross section of the inner twisted belt 4, and the plurality of outer twisted belts 3 are respectively aligned with the plurality of twisted sheets of the inner twisted belt 4 in the radial direction and are synchronously twisted.

[0078] Specifically, as shown in Figure 3 and Figure 4 , when the cross section of the inner twisted belt 4 is single-rod-shaped, when it is twisted, the two sides of the inner twisted belt 4 are twisted respectively, at this time, two twisted sheets are formed, so two outer twisted belts 3 are arranged respectively corresponding to the two twisted sheets, the outer twisted belts 3 are aligned with the twisted sheets in the radial direction and are synchronously twisted.

[0079] As shown in Figure 5 and Figure 6 , as shown in Figure 7 and Figure 8 , when the cross section of the inner twisted belt 4 is multi-rod-shaped, the inner twisted belt 4 has a plurality of twisted sheets, and the plurality of twisted sheets are twisted at the same time, and at this time, the number of the outer twisted belts 3 is the same as the number of the twisted sheets, and the outer twisted belts 3 are arranged one by one corresponding to the twisted sheets, that is, the outer twisted belts 3 are aligned with the twisted sheets in the radial direction and are synchronously twisted.

[0080] The effect of such arrangement is that the liquid in the inner tube 2 flows between the two twisted sheets, and the liquid in the gap between the outer tube 1 and the inner tube 2 flows between the two outer twisted belts 3, and the liquid and the liquid are aligned with each other in the radial direction, and the flow trajectories are the same, so that sufficient contact is achieved, and in the process of moving along the spiral trajectory, disturbance can be achieved to cause turbulent flow and enhance the heat exchange effect.

[0081] Further, the twisting rates of the inner twisted belt 4 and the outer twisted belt 3 are equal, and the twisting rate is the ratio of the length of the twisted belt after twisting by 180 degrees in the axial direction to the diameter of the inner tube 2.

[0082] The twist rates are equal, so that synchronous twisting of the two twisted bands is achieved, and synchronous flow between the inner and outer fluids is achieved, so that sufficient contact heat exchange is achieved.

[0083] As Figure 1 and Figure 2 In addition to including the inner twisted band 4, the outer twisted band 3, the inner tube 2, and the outer tube 1, the heat exchanger of the embodiment further includes a first inlet section 5 communicating with the first flow channel, a second inlet section 6 communicating with the second flow channel, a first outlet section 7 communicating with the other side of the first flow channel, and a second outlet section 8 communicating with the other side of the second flow channel. The flow directions of the fluids in the first flow channel and the second flow channel are opposite.

[0084] Specifically, the first inlet section 5 of the first flow channel is located at one end of the first flow channel, the first outlet section 7 of the first flow channel is located at the other end of the first flow channel, the second inlet section 6 of the second flow channel is located at one end of the second flow channel, and the second outlet section 8 of the second flow channel is located at the other end of the second flow channel. The first inlet section 5 and the second inlet section 6 are located at different ends, respectively, and the first outlet section 7 and the second outlet section 8 are located at different ends, respectively, so that the fluids flow in opposite directions, the fluids for heat exchange are constantly changed, and the heat exchange efficiency is increased.

[0085] The embodiment further provides that a first transition section 9 is arranged between the first inlet section 5 and the first flow channel and between the first outlet section 7 and the first flow channel.

[0086] A second transition section 10 is arranged between the second inlet section 6 and the second flow channel and between the second outlet section 8 and the second flow channel.

[0087] Specifically, the inlet section and the outlet section are connected to the flow channel through the transition section, which facilitates the arrangement of the inlet section and the outlet section, is conducive to the control of the opening direction of the inlet section and the outlet section, and avoids interference between the inlet section and the outlet section located on the same side by turning through the transition section, because the two flow channels are coaxially arranged.

[0088] Specifically, the first inlet section 5 and the second outlet section 8 can be arranged as follows. The first inlet section 5 is connected to the first transition section 9, the first transition section 9 is connected to one end of the outer tube 1, the second transition section 10 is connected to one end of the inner tube 2 and connected to the second outlet section 8 after passing through the first transition section 9, so that the two flow channels and the inlet and outlet are relatively independent and not connected to each other, and the transition section can be deflected, so that the first inlet section 5 and the second outlet section 8 can be arranged side by side without interference.

[0089] The heat exchanger provided by the application is verified by computational fluid dynamics. The heat exchange capacity of the heat exchanger is defined as:

[0090] Q = C ρ q m (Tout -T in )

[0091] where C ρ is the specific heat capacity of the fluid, q m is the mass flow rate of the fluid, T out , T in are the outlet temperature and the inlet temperature of the fluid, respectively.

[0092] The overall heat transfer coefficient of the heat exchanger is defined as:

[0093] h = Q / AΔt m ;

[0094] where A is the heat transfer area of the fluid, and Δt m is the average temperature difference.

[0095] Given that the inlet temperature of the cold fluid is 25℃ and the inlet temperature of the hot fluid is 80℃, the mass flow rate of the cold and hot fluids is 1200ml / min.

[0096] Table 1 below shows the heat transfer enhancement calculation results of the synchronous twisted heat exchanger under the above-mentioned geometric structure and flow conditions

[0097]

[0098] It can be seen that, under the same fluid inlet temperature and mass flow rate, the heat transfer amount and the heat transfer coefficient of the synchronous twisted heat exchanger are greater than those of the light pipe sleeve heat exchanger.

[0099] The application also provides a specific embodiment of a manufacturing method of a synchronous twisted integrated sleeve heat exchanger, comprising the following steps:

[0100] designing the structure of the heat exchanger;

[0101] determining the processing parameters and selecting a metal additive manufacturing technology for manufacturing, the metal additive manufacturing technology being one of a laser powder bed fusion technology, an electron beam powder bed fusion technology, and a laser deposition manufacturing technology, and the processing parameters including a printing material and a printing direction;

[0102] performing finishing processing after printing is completed.

[0103] In this embodiment, the computer-aided modeling software can be used as a design tool to design the structures of the parts of the heat exchanger.

[0104] The heat exchanger provided in this embodiment has an integrated structure, and the inner pipe 2, the outer pipe 1, the inner twisted belt 4, the outer twisted belt 3, the transition section, and the inlet and outlet sections are integrally manufactured at one time by using a metal additive manufacturing technology, without any welding or other connection, so that the heat exchanger has good sealing performance and higher working reliability.

[0105] As Figure 9 In the embodiment, the design of the heat exchanger specifically includes:

[0106] The inner tube 2 is designed, including the diameter, wall thickness and length of the inner tube 2, and the above parameters are determined according to the requirements;

[0107] The inner twisted band 4 is designed, including the twisted band shape and the twisting rate, which can be specifically one of the above-mentioned shapes such as a straight line, a triangle, a cross or a polygon;

[0108] The outer tube 1 is designed, including the diameter, wall thickness and length of the outer tube 1, and the length of the outer tube 1 is equal to the length of the inner tube 2;

[0109] The outer twisted band 3 is designed, including the twisted band shape and the twisting rate, and the twisting rate of the outer twisted band 3 is the same as that of the inner twisted band 4;

[0110] The first transition section 9 and the second transition section 10 are designed, and the first transition section 9 and the second transition section 10 are connected at the corresponding flow channels;

[0111] The first inlet section 5, the first outlet section 7, the second inlet section 6 and the second outlet section 8 are designed and connected at the corresponding transition sections, thereby completing the design of the synchronous twisted integrated sleeve heat exchanger.

[0112] As Figure 9 After the design is completed, the heat exchanger is manufactured, and the metal additive manufacturing technology can be used, which can be specifically one of the following technologies: laser powder bed fusion technology, electron beam powder bed fusion technology and laser deposition manufacturing technology.

[0113] In the embodiment, the printing material is one or more of stainless steel, titanium alloy, aluminum alloy and copper alloy, and the printing direction is the axial direction of the heat exchanger.

[0114] The post-printing processing, i.e. the finishing processing, includes removing the powder in the heat exchanger, cutting off the printed heat exchanger, or thread processing, which is specifically the processing of internal threads on the inner walls of the inlet section and the outlet section, so as to be connected with the liquid providing equipment.

[0115] The above only describes the preferred embodiments of the present application and should not be used to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A synchronous twisted integrated shell-and-tube heat exchanger, characterized in that, include: outer tube; An inner tube, which passes through the outer tube, has an outer diameter smaller than the inner diameter of the outer tube. The gap between the outer and inner tubes forms a first flow channel for a fluid, and the cavity of the inner tube forms a second flow channel for another fluid. A turbulence strip is disposed within the first and second flow channels, and is used to agitate the fluid. The turbulence strip includes an inner twisted strip disposed within the inner tube, and also includes a strip-shaped outer twisted strip disposed within the first flow channel. The cross-section of the inner twisted strip perpendicular to its length direction is single-rod or multi-rod. If the cross-section of the inner twisted band is a single rod shape, then there are two outer twisted bands, and the two outer twisted bands are respectively aligned with the two side twisted pieces of the inner twisted band in the radial direction and twist synchronously. If the cross-section of the inner twisted band is multi-rod shaped, then the number of outer twisted bands is the same as the number of rods in the cross-section of the inner twisted band, and the multiple outer twisted bands are respectively aligned with the multiple twisted pieces of the inner twisted band in the radial direction and twist synchronously.

2. The synchronous twisted integrated shell-and-tube heat exchanger as described in claim 1, characterized in that, The inner twisted band extends along the length of the inner tube, and the inner twisted band itself is twisted in the circumferential direction of the inner tube.

3. The synchronous twisted integrated shell-and-tube heat exchanger as described in claim 2, characterized in that, The single-bar shape is a straight line, and the multi-bar shape consists of multiple bars connected at the same end, with the bars radiating radially and the included angle between any two adjacent bars being equal. The multi-bar shape has more than two bars, and the bars are of equal length.

4. The synchronous twisted integrated shell-and-tube heat exchanger as described in claim 3, characterized in that, The outer twisted band extends spirally around the inner tube along the length of the inner tube.

5. The synchronous torsion integrated shell-and-tube heat exchanger as described in any one of claims 1-4, characterized in that, The inner and outer twisted belts have equal torsion rates, and the torsion rate is the ratio of the axial length of the twisted belt after it has twisted 180 degrees to the diameter of the inner tube.

6. The synchronous torsion integrated shell-and-tube heat exchanger as described in any one of claims 1-4, characterized in that, The synchronous twisted integrated shell and tube heat exchanger also includes a first inlet section connected to the first flow channel, a second inlet section connected to the second flow channel, a first outlet section connected to the other side of the first flow channel, and a second outlet section connected to the other side of the second flow channel, wherein the flow directions of the fluid in the first flow channel and the second flow channel are opposite.

7. The synchronous twisted integrated shell-and-tube heat exchanger as described in claim 6, characterized in that, A first transition section is provided between the first inlet section and the first flow channel, and between the first outlet section and the first flow channel; A second transition section is provided between the second inlet section and the second flow channel, and between the second outlet section and the second flow channel.

8. A method for manufacturing a synchronous torsion integrated shell-and-tube heat exchanger as described in any one of claims 1-7, characterized in that, Includes the following steps: Design the structure of the heat exchanger; The processing parameters are determined, and a metal additive manufacturing technology is selected for manufacturing. The metal additive manufacturing technology is one of laser powder bed melting technology, electron beam powder bed melting technology, and laser deposition manufacturing technology. The processing parameters include printing material and printing direction. Finishing touches are done after printing.

9. The manufacturing method of the synchronous torsion integrated shell-and-tube heat exchanger as described in claim 8, characterized in that, The heat exchanger is designed as follows: Design the inner tube, including its diameter, wall thickness, and length; Design the internal twisted band, including the twisted band shape and twist rate; Design the outer tube, including its diameter, wall thickness, and length. The length of the outer tube is equal to the length of the inner tube. Design the outer twisted belt, including the twisted belt shape and twist rate. The twist rate of the outer twisted belt is the same as that of the inner twisted belt. Design a first transition section and a second transition section, and connect the first transition section and the second transition section at the corresponding flow channels; Design the first entrance section, the first exit section, the second entrance section, and the second exit section, and connect them to the corresponding transition sections; The printing material is one or more of stainless steel, titanium alloy, aluminum alloy, and copper alloy; The printing direction is the axial direction of the heat exchanger; The finishing process includes removing powder from the heat exchanger, cutting off the printed heat exchanger, and thread machining.

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