Spoiler rod structure and longitudinal flow heat exchanger

Abstract

The present invention relates to the technical field of heat exchangers, and provides a turbulator structure and a longitudinal flow heat exchanger. The above-mentioned turbulator structure includes a rod body, the rod body has opposite first and second sides, the side wall between the first side and the second side is used to connect with the heat exchange tube of the heat exchanger, the first side is the flow-facing side, the first side is an arc surface, and the width dimension of the rod body is greater than the thickness dimension of the rod body. The turbulator structure provided by the present invention, by setting the flow-facing side of the rod body of the turbulator structure as an arc surface and making the width dimension of the rod body greater than the thickness dimension of the rod body, can reduce the contact area between the rod body and the fluid while ensuring the strength of the rod body, thereby reducing the flow resistance of the fluid and improving the heat exchange efficiency of the heat exchanger; at the same time, it can also avoid the generation of the cylindrical turbulence effect and avoid the vibration of the rod body caused by the cylindrical turbulence effect, and further generate vibration friction between the rod body and the heat exchange tube, thereby improving the service life of the heat exchanger.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchangers, and particularly to a turbulator structure and a longitudinal flow heat exchanger. Background Art

[0002] A heat exchanger is an important type of industrial process equipment for realizing heat exchange functions. The total heat transfer coefficient and the flow resistance are two important technical indicators for evaluating the performance of a heat exchanger. Among them, the total heat transfer coefficient determines the compactness of the heat exchanger, and the resistance coefficient determines the pump power consumption and operating economy of the heat exchange system. Under some special backgrounds, such as when the viscosity of the heat exchange medium is relatively high and the pump head needs to be controlled, low-resistance type strengthening measures represented by longitudinal flow heat exchangers need to be adopted. In a longitudinal flow heat exchanger, the macroscopic flow direction of the fluid medium is parallel to the axis of the heat exchange tube to avoid the problem of large resistance caused by cross flow, crosswise flow, and staggered flow between the tube bundles. At the same time, by adopting turbulator components such as baffles, vortices can be generated near the heat exchange tube to achieve local heat transfer enhancement, compensating to a certain extent for the influence of cross flow, crosswise flow, and staggered flow on the longitudinal heat transfer coefficient of the heat exchanger. However, the baffle perpendicular to the fluid flow direction will also generate a certain resistance while enhancing the turbulence, restricting the further reduction of the fluid flow resistance outside the heat exchange tube. Summary of the Invention

[0003] The present invention provides a turbulator structure and a longitudinal flow heat exchanger to solve the defect of large fluid resistance outside the heat exchange tube of the longitudinal flow heat exchanger in the prior art.

[0004] The present invention provides a turbulator structure, including a rod body. The rod body has opposite first and second sides. The side wall between the first side and the second side is used to connect with the heat exchange tube of the heat exchanger. The first side is the flow-facing side, and the first side is an arc surface. The width dimension of the rod body is greater than the thickness dimension of the rod body.

[0005] According to the turbulator structure provided by the present invention, the width dimension of the second side is smaller than the width dimension of the first side.

[0006] According to the turbulator structure provided by the present invention, the cross-sectional shape of the rod body is a water droplet shape.

[0007] According to the turbulator structure provided by the present invention, the rod body includes a first body, a second body, and a third body connected in sequence. Among them, the cross-sectional shape of the first body is an arc shape, the cross-sectional shape of the second body is a rectangle, and the distance between the two opposite sides of the third body connected to the second body gradually decreases to form a tapered shape.

[0008] According to the turbulator structure provided by the present invention, the first end of the first body is connected to the second body, and multiple protrusions are provided at the second end of the first body.

[0009] A spoiler bar structure provided by the present invention, the first end of the third body is connected to the second body, and the end of the second end of the third body is in a serrated structure.

[0010] A spoiler bar structure provided by the present invention, a plurality of corner wing structures are provided on opposite sides of the third body, the corner wing structure has a first surface, the first surface faces the oncoming flow, and the included angle formed between the first surface and the surface of the second body is an acute angle.

[0011] A spoiler bar structure provided by the present invention, the corner wing structure further has opposite second and third surfaces, the second and third surfaces are respectively located on both sides of the first surface, and along the direction away from the surface of the second body, the distance between the second surface and the third surface increases.

[0012] The present invention also provides a longitudinal flow heat exchanger, including a shell and a plurality of spoiler bar structures as described above. A plurality of heat exchange tubes and a plurality of spoiler bar structures are provided in the shell. The rod body of the spoiler bar structure is perpendicular to the heat exchange tubes. The side wall of each rod body is connected to the heat exchange tube, and the first side of each rod body faces the direction of the oncoming flow.

[0013] A longitudinal flow heat exchanger provided by the present invention further includes a plurality of baffle rings. The plurality of baffle rings are arranged in the shell and are sequentially sleeved outside the plurality of heat exchange tubes. The baffle rings are used to fix the rod bodies.

[0014] For the spoiler bar structure provided by the present invention, by setting the oncoming flow side of the rod body of the spoiler bar structure as an arc surface and making the width dimension of the rod body larger than the thickness dimension of the rod body, the contact area between the rod body and the fluid can be reduced while ensuring the strength of the rod body, thereby reducing the flow resistance of the fluid and improving the heat exchange efficiency of the heat exchanger; at the same time, making the width dimension of the rod body larger than the thickness dimension of the rod body can also avoid the generation of the cylinder wake effect and avoid the vibration of the rod body caused by the cylinder wake effect, thereby generating vibration friction between the rod body and the heat exchange tube, thus improving the service life of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0016] Figure 1 It is a top view of the spoiler bar structure provided by the present invention;

[0017] Figure 2 is a side view of the spoiler rod structure provided by the present invention;

[0018] Figure 3 is a schematic structural view of the spoiler rod structure provided by the present invention;

[0019] Figure 4 is a schematic structural view of the longitudinal flow heat exchanger provided by the present invention;

[0020] Figure 5 is a schematic layout view of the spoiler rod structure in the longitudinal flow heat exchanger provided by the present invention;

[0021] Figure 6 is Figure 4 a schematic view of the connection relationship between the baffle ring and the spoiler rod structure shown in;

[0022] Reference numerals:

[0023] 10: rod body; 11: first body; 12: second body; 13: third body; 20: heat exchange tube; 30: baffle ring; 100: housing; 101: first liquid inlet; 102: first liquid outlet; 103: second liquid inlet; 104: second liquid outlet; 111: protrusion; 131: serrated structure; 132: angular wing structure. Detailed embodiments

[0024] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0025] The terms "first" and "second" in the description and claims of the present invention may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "a plurality of" means two or more.

[0026] The following combines Figures 1-6 to describe the spoiler rod structure and the longitudinal flow heat exchanger of the present invention.

[0027] As Figure 1 shown, in an embodiment of the present invention, the spoiler rod structure includes a rod body 10. The rod body 10 has opposite first and second sides. The side wall between the first side and the second side is used to connect with the heat exchange tube of the heat exchanger. Among them, the first side is the flow-facing side, the first side is an arc surface, and the width dimension of the rod body 10 is greater than the thickness dimension of the rod body 10.

[0028] Specifically, in a longitudinal flow heat exchanger, the fluid with a higher temperature flows inside the heat exchange tubes, and the low-temperature fluid flows along the length direction of the heat exchange tubes after entering the heat exchanger housing. Each heat exchange tube is provided with a plurality of baffles along its own length direction. In the prior art, the baffles are circular straight tubes, which have a relatively large contact area with the low-temperature fluid and a relatively large resistance, reducing the heat exchange efficiency of the heat exchanger.

[0029] In this embodiment, the first side of the rod body 10 is the flow-facing side, and the second side is the flow-back side. The first side of the rod body 10 is arc-shaped, which can reduce the contact area between the flow-facing side and the low-temperature fluid, thereby reducing the flow resistance of the low-temperature fluid; and the width dimension of the rod body 10 is smaller than the thickness dimension of the rod body 10, making the cross-section of the rod body 10 flat, so as to reduce the contact area between the entire rod body 10 and the low-temperature fluid, thereby reducing the flow resistance.

[0030] Optionally, in the embodiments of the present invention, the cross-sectional shape of the rod body 10 may be a water droplet shape, an oval shape, an olive ball shape, etc.

[0031] Furthermore, in the prior art, the baffles are usually circular straight tubes. After seawater passes through the circular straight tubes, a cylindrical wake effect is likely to occur at the rear of the circular straight tubes, inducing the baffles to vibrate, and then causing vibration friction between the baffles and the heat exchange tubes, which is likely to damage the heat exchanger. By reducing the thickness dimension of the rod body 10 and increasing the width dimension, the cylindrical wake effect can be avoided at the rear of the rod body 10, and thus the rod body 10 can be prevented from vibrating due to the cylindrical wake effect, reducing the vibration friction between the rod body 10 and the heat exchange tubes, and improving the service life of the heat exchanger.

[0032] The baffle structure provided by the embodiments of the present invention, by setting the flow-facing side of the rod body of the baffle structure as an arc surface and making the width dimension of the rod body greater than the thickness dimension of the rod body, can reduce the contact area between the rod body and the fluid while ensuring the strength of the rod body, thereby reducing the flow resistance of the fluid and improving the heat exchange efficiency of the heat exchanger; at the same time, making the width dimension of the rod body greater than the thickness dimension of the rod body can also avoid the generation of the cylindrical wake effect and avoid the vibration of the rod body caused by the cylindrical wake effect, and then generate vibration friction between the rod body and the heat exchange tubes, thereby improving the service life of the heat exchanger.

[0033] As Figure 1 shown, in the embodiments of the present invention, the width dimension of the second side of the rod body 10 is smaller than the width dimension of the first side. Specifically, after the low-temperature fluid passes through the first side of the rod body 10, its contact area with the second side of the rod body 10 is smaller, so as to further reduce the resistance when the low-temperature fluid flows.

[0034] Optionally, in the embodiments of the present invention, the cross-sectional shape of the rod body 10 is a water droplet shape.

[0035] As shown Figure 1 In the embodiment of the present invention, the rod body 10 includes a first body 11, a second body 12 and a third body 13 connected in sequence. Among them, the cross-sectional shape of the first body 11 is arc-shaped, the cross-sectional shape of the second body 12 is rectangular, and the distance between the two opposite sides of the third body 13 connected to the second body 12 gradually decreases, forming a tapered shape.

[0036] Specifically, in the prior art, the baffling rod is a circular straight pipe, and its connection with the heat exchange tube is a point-to-point connection. Under the impact of the low-temperature fluid and the action of the cylindrical flow disturbance effect, the baffling rod is prone to vibration, and then the baffling rod and the heat exchange tube generate vibration friction, resulting in damage to the structure of the heat exchanger.

[0037] In this embodiment, the cross-sectional shape of the second body 12 is rectangular, and its connection with the heat exchange tube is a line-to-line connection, so as to increase the contact area between the rod body 10 and the heat exchange tube to suppress vibration friction.

[0038] Furthermore, in this embodiment, the cross-sectional shape of the first body 11 can be semi-circular, the cross-sectional shape of the second body 12 is rectangular, the width of the rectangle is equal to the diameter of the semi-circle, and the cross-sectional shape of the third body 13 can be an isosceles triangle. The two waists of the isosceles triangle are respectively connected to the two long sides of the rectangle, so that the cross-sectional shape of the rod body 10 forms a shape similar to an elongated water droplet, thereby avoiding the cylindrical flow disturbance effect at the rear of the rod body 10, and further avoiding the vibration of the rod body 10 caused by the cylindrical flow disturbance effect. In this embodiment, the sum of the lengths of the first body 11, the second body 12 and the third body 13 is greater than the width of the second body 12, thereby reducing the contact area between the low-temperature fluid and the rod body 10, and further reducing the flow resistance of the low-temperature fluid.

[0039] As shown Figure 2 In an embodiment of the present invention, the first end of the first body 11 of the rod body 10 is connected to the second body 12, and a plurality of protrusions 111 are provided at the second end of the first body 11.

[0040] Specifically, providing a plurality of protrusions 111 on the upstream side of the rod body 10 can play a role in destroying the boundary layer adhesion and reducing the resistance on the upstream side of the rod body 10. Furthermore, the cross-sectional shape of the protrusions 111 can be various shapes, such as diamond-shaped, circular, etc.

[0041] As shown Figure 3 In the embodiment of the present invention, the first end of the third body 13 is connected to the second body 12, and a serrated structure 131 is provided at the end of the second end of the third body 13.

[0042] Specifically, in the above-described embodiment, the distance between the two sides where the third body 13 is connected to the second body 12 gradually decreases to form a tip, and a serrated structure 131 is provided at the tip. The serrated structure 131 can reduce the vortex shedding resistance and suppress the vortex shedding excitation, thereby enhancing the heat transfer capacity.

[0043] As Figure 3 shown, in the embodiment of the present invention, corner wing structures 132 are provided on opposite sides of the third body 13. The corner wing structure 132 has a first surface that faces the oncoming flow, and the angle formed between the first surface and the surface of the second body 12 is an acute angle.

[0044] Specifically, in this embodiment, the distance between the two opposite sides of the third body 13 gradually decreases, so that the two opposite side surfaces of the third body 13 form inclined surfaces, and a plurality of corner wing structures 132 are provided on both inclined surfaces. An angle is formed between the corner wing structure 132 and the inclined surface, so that when the low-temperature fluid passes through the corner wing structure 132, a flow vortex is formed around the corner wing structure 132, thereby increasing the contact area between the low-temperature fluid and the heat exchange tube to improve the heat transfer capacity.

[0045] Optionally, the corner wing structure 132 can be a rectangular block or a triangular block. When it is connected to the third body 13, an angle should be formed between the two, and the angle is an acute angle.

[0046] Furthermore, as Figure 3 shown, in the embodiment of the present invention, the corner wing structure 132 also has opposite second and third surfaces, and the second and third surfaces are respectively located on both sides of the first surface. Along the direction away from the surface of the second body 12, the distance between the second surface and the third surface increases.

[0047] Specifically, in this embodiment, the corner wing structure 132 is a pentahedron structure. The surface facing the oncoming flow is the first surface, the two side surfaces located on both sides of the first surface are the second and third surfaces respectively, the top surface is the fourth surface, and the back surface opposite to the first surface is the fifth surface. Among them, the fourth surface is an isosceles triangle, and the second and third surfaces are inclined to the surface of the second body 12, that is, both the second and third surfaces are inclined surfaces, and the angle between the second surface and the surface of the second body 12 is an acute angle, and the angle between the third surface and the surface of the second body 12 is also an acute angle. When the fluid passes through the corner wing structure 132, it is very easy to form a flow vortex around the corner wing structure 132, thereby increasing the contact area between the low-temperature fluid and the heat exchange tube to improve the heat transfer capacity.

[0048] As Figure 4As shown in the figure, an embodiment of the present invention further provides a longitudinal flow heat exchanger, which includes a housing 100 and a plurality of spoiler rod structures. A plurality of heat exchange tubes 20 and a plurality of spoiler rod structures are provided in the housing 100. The rod bodies 10 of the spoiler rod structures are perpendicularly arranged to the heat exchange tubes 20. The side wall of each rod body 10 is connected to the heat exchange tube 20, and the first side of each rod body 10 faces the direction of the incoming fluid.

[0049] Specifically, a first liquid inlet 101 and a first liquid outlet are provided at opposite ends of the housing 100. The length directions of the plurality of heat exchange tubes 20 are the same as the length direction of the housing 100. The fluid with a higher temperature enters each heat exchange tube 20 through the first liquid inlet 101 and then is discharged through the first liquid outlet 102. A second liquid inlet 103 and a second liquid outlet 104 are further provided on the side wall of the housing 100. The low-temperature fluid enters the housing 100 through the second liquid inlet 103 and flows along the gaps between adjacent heat exchange tubes 20, flowing through each spoiler rod structure. The low-temperature fluid exchanges heat with the fluid with a higher temperature in the heat exchange tube 20, absorbs heat, and then is discharged through the second liquid outlet 104.

[0050] Furthermore, as Figure 5 shown, the plurality of spoiler rod structures are arranged in an array. Specifically, the plurality of spoiler rod structures are divided into multiple groups, and each group includes a plurality of spoiler rod structures arranged in parallel. The spoiler rod structures in adjacent two groups are perpendicularly arranged to each other. Each spoiler rod structure is perpendicularly arranged to the heat exchange tube 20, and the first side of each spoiler rod structure faces the incoming fluid.

[0051] The first side of the rod body 10 of the spoiler rod structure is the upstream side, and the second side is the downstream side. The side wall between the first side and the second side is connected to the heat exchange tube 20. The first side of the rod body 10 is arc-shaped, which can reduce the contact area between the upstream side and the fluid and reduce the flow resistance of the low-temperature fluid; and the width dimension of the rod body 10 is smaller than the thickness dimension of the rod body 10, so that the cross-section of the rod body 10 is flat, in order to reduce the contact area between the whole rod body 10 and the low-temperature fluid, and further reduce the flow resistance of the low-temperature fluid.

[0052] The longitudinal flow heat exchanger provided by the embodiment of the present invention can reduce the flow resistance of the low-temperature fluid flowing along the heat exchange tube by setting the spoiler rod structure, and improves the heat transfer coefficient of the longitudinal flow heat exchanger.

[0053] As Figure 6 shown, in an embodiment of the present invention, the longitudinal flow heat exchanger further includes a plurality of baffles 30. The plurality of baffles 30 are arranged in the housing 100 and are sleeved on the outside of the plurality of heat exchange tubes 20 in sequence. The baffle 30 is used to fix the rod body 10.

[0054] Specifically, in this embodiment, the number of the baffle rings 30 is the same as the number of groups of the spoiler rod structures. Each baffle ring 30 is used to fix a plurality of spoiler rod structures within a group, and both ends of the rod body 10 of each spoiler rod structure are connected to the inner wall of the baffle ring 30.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. However, such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A spoiler rod structure, characterized in that It includes a rod body, the rod body having opposite first and second sides, the side wall between the first side and the second side being used for connection with the heat exchange tubes of a heat exchanger, the first side being the flow-facing side, the first side being an arc surface, and the width dimension of the rod body being greater than the thickness dimension of the rod body; The rod body includes a first body, a second body and a third body connected in sequence. Among them, the cross-sectional shape of the first body is circular arc-shaped, the cross-sectional shape of the second body is rectangular, and the distance between the opposite two sides of the third body connected to the second body gradually decreases, forming a tapered shape; A plurality of corner wing structures are provided on the opposite sides of the third body. The corner wing structure has a first surface facing the oncoming flow, and the included angle formed between the first surface and the surface of the second body is an acute angle.

2. The spoiler rod structure according to claim 1, wherein The width dimension of the second side is smaller than the width dimension of the first side.

3. The spoiler rod structure according to claim 2, wherein, The cross-sectional shape of the rod body is a water droplet shape.

4. The spoiler rod structure according to claim 1, characterized in that The first end of the first body is connected to the second body, and a plurality of protrusions are provided at the second end of the first body.

5. The spoiler rod structure according to claim 1, characterized in that, The first end of the third body is connected to the second body, and the end of the second end of the third body is in a serrated structure.

6. The spoiler rod structure according to claim 1, characterized in that, The corner wing structure further has opposite second and third surfaces, the second surface and the third surface being respectively located on both sides of the first surface, and the distance between the second surface and the third surface increases in the direction away from the surface of the second body.

7. A longitudinal flow heat exchanger, characterized in that, It includes a housing and a plurality of turbulator rod structures according to any one of claims 1-6. A plurality of heat exchange tubes and a plurality of the turbulator rod structures are provided in the housing. The rod bodies of the turbulator rod structures are arranged perpendicular to the heat exchange tubes, the side wall of each rod body is connected to the heat exchange tube, and the first side of each rod body faces the direction of the oncoming flow.

8. The longitudinal flow heat exchanger according to claim 7, characterized in that, It further includes a plurality of baffle rings. The plurality of baffle rings are arranged in the housing and are sleeved on the outside of the plurality of heat exchange tubes in sequence. The baffle rings are used for fixing the rod bodies.

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