Sleeve and heat exchanger
By opening a drainage tank unit on the side wall of the casing and combining a hydrophobic coating, the problem of water accumulation in the casing is difficult to discharge, ensuring the dryness of the heat exchanger, preventing corrosion, and improving service life and reliability.
Patent Information
- Application Number
- CN202422519699.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-17
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-10-17
AI Technical Summary
The accumulated water in the existing casing is difficult to discharge in time, resulting in corrosion of parts in the heat exchanger and affecting reliability.
A drainage tank unit is opened on the side wall of the casing so that its projection on the projection surface covers all the projection of the casing, ensuring that the inside and outside of the casing are connected, and combining with a hydrophobic coating for easy drainage.
Effectively prevent water accumulation in the casing, maintain dryness, avoid corrosion of parts, and improve the service life and reliability of the heat exchanger.
Smart Images
Figure CN223228862U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of heat exchangers, and in particular to a casing and a heat exchanger. Background Art
[0002] Shell-and-tube heat exchangers are widely used in various air conditioning systems and typically consist of a shell, tubesheet, heat exchange tubes, baffles, sleeves, and tie rods. The shell is connected to the tubesheet, with both ends of the heat exchange tubes secured to the tubesheet. The baffles are installed within the shell and secure the heat exchange tubes. The sleeve is installed between the baffles, with both ends of the sleeve in close contact with the baffles, and the tie rods are inserted into the sleeve.
[0003] Currently, during internal core submersion leak detection and customer water flow testing, water seeps into the casing from both ends. During subsequent drainage, the water is difficult to drain quickly, leading to accumulation of water inside the casing. This accumulation of water makes the heat exchanger damp or wet, which can easily cause corrosion of the tie rods and heat exchange tubes, significantly impacting the reliability of the entire heat exchanger. Utility Model Content
[0004] Based on this, it is necessary to provide a casing and a heat exchanger to solve the problem that the accumulated water in the existing casing is difficult to be discharged in time, which easily leads to corrosion of the components in the heat exchanger.
[0005] The present application provides a sleeve, which is used to position a baffle in a heat exchanger. A drainage trough unit is provided on the side wall of the sleeve, and the drainage trough unit connects the inside and outside of the sleeve; wherein a plane perpendicular to the axial direction of the sleeve is defined as a projection plane, and the projection of the drainage trough unit on the projection plane can cover the entire projection of the sleeve on the projection plane.
[0006] In one embodiment, the drainage groove unit includes at least one spiral groove, and the spiral groove extends in a spiral shape.
[0007] In one embodiment, the helix angle A of the spiral groove satisfies 60°≤A≤80°; and / or the pitch L of the spiral groove satisfies 5mm≤L≤10mm.
[0008] In one embodiment, the drainage trough unit includes a plurality of annular grooves, which extend along the circumference of the sleeve; wherein the projection of any one of the annular grooves on the projection surface at least partially overlaps with the projection of another one of the annular grooves, and the combined projection of the plurality of annular grooves on the projection surface can cover the entire projection of the sleeve on the projection surface.
[0009] In one embodiment, the spacing H between two adjacent annular grooves along the axial direction of the sleeve satisfies 5mm≤H≤10mm; and / or the length S of the annular groove along the circumference of the sleeve and the circumference T of the sleeve satisfy 1 / 4≤S / T≤1 / 3.
[0010] In one embodiment, the drainage trough unit includes a plurality of strip grooves, which extend along the axial direction of the sleeve; wherein the projection of any strip groove at least partially overlaps with the projection of another strip groove on the projection surface, and the combined projection of the plurality of strip grooves on the projection surface can cover the entire projection of the sleeve on the projection surface.
[0011] In one embodiment, the sleeve is coated with a hydrophobic coating.
[0012] In one embodiment, the sleeve is a plastic part.
[0013] The present application also provides a heat exchanger, which includes a tie rod and the sleeve described in any one of the above embodiments, wherein the sleeve is sleeved on the outer circumference of the tie rod and is loosely fitted with the tie rod.
[0014] In one embodiment, the distance I between the inner wall of the sleeve and the outer wall of the pull rod satisfies 0.5 mm ≤ I ≤ 0.8 mm.
[0015] Compared to the prior art, the sleeve and heat exchanger provided in this application have drainage grooves on the sleeve, and the projection of the drainage grooves on the projection surface can cover the entire projection of the sleeve on the projection surface. That is, the sleeve has at least one point along its circumferential direction that can connect the interior and exterior of the sleeve through the drainage grooves. In this way, regardless of how the sleeve is installed on the baffle, it can ensure that there is an area at the bottom of the sleeve that can be drained, thereby effectively preventing water accumulation in the sleeve, ensuring the dryness of the sleeve and heat exchanger, and preventing the corrosion of the components within the heat exchanger caused by a humid environment, greatly improving the service life and reliability of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0017] Figure 1 A schematic structural diagram of the sleeve according to Example 1 provided in this application;
[0018] Figure 2A schematic structural diagram of the sleeve according to the second embodiment of the present application;
[0019] Figure 3 A cross-sectional view of the sleeve of Example 2 provided in this application;
[0020] Figure 4 A schematic structural diagram of the sleeve according to the third embodiment of the present application;
[0021] Figure 5 This is a schematic structural diagram of a heat exchanger according to an embodiment of the present application.
[0022] The symbols in the figure mean the following:
[0023] 100, heat exchanger; 10, casing; 11, drainage trough unit; 111, spiral groove; 112, annular groove; 113, strip groove; 20, baffle; 30, tie rod; 40, shell; 50, heat exchange tube. DETAILED DESCRIPTION
[0024] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.
[0025] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.
[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.
[0027] In this application, unless otherwise expressly specified or limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or that the first feature and the second feature are indirectly in contact through an intermediate medium. Furthermore, a first feature being “above,” “above,” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below,” “below,” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0028] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the relevant listed items.
[0029] Shell-and-tube heat exchangers are widely used in various air conditioning systems and typically consist of a shell, tubesheet, heat exchange tubes, baffles, sleeves, and tie rods. The shell is connected to the tubesheet, with both ends of the heat exchange tubes secured to the tubesheet. The baffles are installed within the shell and secure the heat exchange tubes. The sleeve is installed between the baffles, with both ends of the sleeve in close contact with the baffles, and the tie rods are inserted into the sleeve.
[0030] Currently, during internal core submersion leak detection and customer water flow testing, water seeps into the casing from both ends. During subsequent drainage, the water is difficult to drain quickly, leading to accumulation of water inside the casing. This accumulation of water makes the heat exchanger damp or wet, which can easily cause corrosion of the tie rods and heat exchange tubes, significantly impacting the reliability of the entire heat exchanger.
[0031] See also Figure 1-Figure 5 To address the problem of water accumulation in existing casings being difficult to drain promptly, which can easily lead to corrosion of components within the heat exchanger, the present application provides a casing 10 for positioning a baffle 20 within a heat exchanger 100. A drainage trough unit 11 is defined on the sidewall of the casing 10, connecting the interior and exterior of the casing 10. A plane perpendicular to the axial direction of the casing 10 is defined as a projection plane, and the projection of the drainage trough unit 11 on the projection plane can cover the entire projection of the casing 10 on the projection plane.
[0032] It is understandable that the present application provides a drainage trough unit 11 on the sleeve 10, and the projection of the drainage trough unit 11 on the projection surface can cover the entire projection of the sleeve 10 on the projection surface. That is, the sleeve 10 has at least one point in its circumferential direction that can connect the inside and outside of the sleeve 10 through the drainage trough unit 11. In this way, no matter how the sleeve 10 is installed on the baffle 20, it can ensure that there is an area at the bottom of the sleeve 10 that can be drained, thereby effectively preventing water accumulation in the sleeve 10, ensuring the dryness of the sleeve 10 and the heat exchanger 100, and avoiding the corrosion of the components in the heat exchanger 100 caused by the humid environment, thereby greatly improving the service life and reliability of the heat exchanger 100.
[0033] Furthermore, in one embodiment, a hydrophobic coating is coated inside the sleeve 10 to further facilitate drainage. The hydrophobic coating can be configured as a fluorocarbon coating, a silicon-based coating, a nano coating, or the like.
[0034] In order to improve the corrosion resistance of the sleeve 10, in one embodiment, the sleeve 10 can be configured as a plastic part. In this way, the plastic is low in cost, easy to process, and has good corrosion resistance.
[0035] Example 1
[0036] In this embodiment, if Figure 1 As shown, the drain trough unit 11 includes at least one spiral groove 111, which extends in a spiral shape. The arrangement of the spiral groove 111 provides openings around the circumference of the sleeve 10, facilitating the drainage of accumulated water. Furthermore, the processing of the spiral groove 111 is relatively simple, which can improve processing efficiency.
[0037] Specifically, in this embodiment, one spiral groove 111 is provided, and the spiral groove 111 extends from one end to the other end of the sleeve 10 along the axial direction of the sleeve 10. Of course, two, three or more spiral grooves 111 can also be provided as needed, which is not limited here.
[0038] In one embodiment, the helix angle A of the spiral groove 111 satisfies 60°≤A≤80°. This facilitates controlling the pitch of the spiral groove 111, thereby effectively increasing the coverage of the spiral groove 111 on the sleeve 10 while ensuring the structural strength of the sleeve 10, thereby facilitating the drainage of accumulated water.
[0039] Optionally, the helix angle of the spiral groove 111 may be set to 60°, 65°, 70°, 75° or 80°, etc., which are not listed here one by one.
[0040] In another embodiment, the pitch L of the spiral groove 111 satisfies 5 mm ≤ L ≤ 10 mm. In this way, the coverage of the spiral groove 111 on the sleeve 10 can be effectively improved while ensuring the structural strength of the sleeve 10, thereby facilitating the drainage of accumulated water.
[0041] Specifically, if the pitch L of the spiral groove 111 is greater than 10 mm, the spiral groove 111 occupies a smaller proportion of the sleeve 10, increasing the risk of moisture accumulation in the sleeve 10. If the pitch L of the spiral groove 111 is less than 5 mm, the spiral groove 111 occupies a larger proportion of the sleeve 10, thereby affecting the structural strength of the sleeve 10. The pitch of the spiral groove 111 can be set to 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, or 10 mm, etc., which are not listed here.
[0042] Example 2
[0043] In this embodiment, if Figure 2 and Figure 3 As shown, the drainage trough unit 11 includes multiple annular grooves 112, which extend along the circumference of the sleeve 10. The projection of any one annular groove 112 on the projection plane at least partially overlaps with that of another annular groove 112, and the combined projection of the multiple annular grooves 112 on the projection plane can cover the entire projection of the sleeve 10 on the projection plane. In other words, by adjusting the position of the annular grooves 112 in this embodiment, it is also possible to ensure that the sleeve 10 has openings for drainage along the circumference. Therefore, during the installation of the sleeve 10, no matter which area of the circumference of the sleeve 10 is used as the bottom of the sleeve 10, the annular grooves 112 can be used to achieve drainage, further improving the convenience of drainage.
[0044] In one embodiment, the spacing H between two adjacent annular grooves 112 along the axial direction of the sleeve 10 satisfies 5 mm ≤ H ≤ 10 mm. This ensures both the structural strength of the sleeve 10 and improved drainage performance. If H is greater than 10 mm, the spacing between adjacent annular grooves 112 is greater, increasing the risk of water accumulation. If H is less than 5 mm, the annular grooves 112 are more densely distributed, which may affect the structural strength of the sleeve 10.
[0045] Optionally, the distance between two adjacent annular grooves 112 can be set to 5 mm, 6 mm, 7 mm, 8 mm, 9 mm or 10 mm, etc., which are not listed here one by one.
[0046] In another embodiment, the length S of the annular groove 112 along the circumference of the sleeve 10 and the circumference T of the sleeve 10 satisfy the following relationship: 1 / 4 ≤ S / T ≤ 1 / 3. This ensures the structural strength of the sleeve 10 while reducing the difficulty in machining the annular groove 112. If S / T > 1 / 3, the length of the annular groove 112 is longer, reducing the structural strength of the sleeve 10. If S / T < 1 / 4, the length of the annular groove 112 is shorter, requiring more annular grooves 112 to achieve circumferential fit, increasing the machining difficulty.
[0047] Optionally, the value of S / T may be 1 / 4, 5 / 18, 11 / 36 or 1 / 3, etc., which are not listed here one by one.
[0048] Example 3
[0049] In this embodiment, if Figure 4 As shown, the drainage trough unit 11 includes a plurality of strip grooves 113, which extend along the axial direction of the sleeve 10. The projections of any strip groove 113 on the projection plane at least partially overlap with those of another strip groove 113, and the combined projection of the plurality of strip grooves 113 on the projection plane can cover the entire projection of the sleeve 10 on the projection plane.
[0050] That is, in this embodiment, by adjusting the position of the strip groove 113, it is also possible to ensure that the sleeve 10 is provided with openings in the circumferential direction for drainage. Therefore, during the installation of the sleeve 10, no matter which area in the circumferential direction of the sleeve 10 is used as the bottom of the sleeve 10, the strip groove 113 can be used to achieve drainage, further improving the convenience of drainage.
[0051] See also Figure 5 The present application also provides a heat exchanger 100, which includes a shell 40, a heat exchange tube 50, a baffle 20, a pull rod 30 and the sleeve 10 described in any one of the above embodiments, wherein the heat exchange tube 50 and the baffle 20 are both installed in the shell 40, wherein the baffle 20 is used to fix the heat exchange tube 50, the sleeve 10 is installed between the baffles 20 and in close contact with the baffle 20, and is used to position the baffle 20, and the sleeve 10 is sleeved on the outer periphery of the pull rod 30 and is clearance-fitted with the pull rod 30, so as to reduce the difficulty of sleeve connection of the sleeve 10 through clearance fit.
[0052] Furthermore, in one embodiment, the distance I between the inner wall of the sleeve 10 and the outer wall of the pull rod 30 satisfies 0.5 mm ≤ I ≤ 0.8 mm. This can reduce the difficulty of assembling the sleeve 10 and help prevent water from gathering.
[0053] Specifically, if I > 0.8 mm, the gap between the sleeve 10 and the tie rod 30 is too large, causing excessive water to collect between the sleeve 10 and the tie rod 30, thereby increasing the risk of corrosion of the tie rod 30. If I < 0.5 mm, the gap between the sleeve 10 and the tie rod 30 is too small, making it more difficult to sleeve the sleeve 10, which is not conducive to improving assembly efficiency.
[0054] For example, the distance between the inner wall of the sleeve 10 and the outer wall of the pull rod 30 can be 0.5 mm, 0.6 mm, 0.7 mm or 0.8 mm, etc., which are not listed here one by one.
[0055] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0056] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of patent protection for the present application shall be determined by the appended claims.
Claims
1. A sleeve for positioning a baffle (20) in a heat exchanger, characterized in that: A drainage groove unit (11) is provided on the side wall of the sleeve, and the drainage groove unit (11) communicates the inside and the outside of the sleeve; A plane perpendicular to the axial direction of the sleeve is defined as a projection plane, and the projection of the drainage trough unit (11) on the projection plane can cover the entire projection of the sleeve on the projection plane.
2. The sleeve according to claim 1, characterized in that The drainage groove unit (11) comprises at least one spiral groove (111), and the spiral groove (111) extends in a spiral shape.
3. The sleeve according to claim 2, characterized in that The helical angle A of the spiral groove (111) satisfies 60°≤A≤80°; And / or, the pitch L of the spiral groove (111) satisfies 5mm≤L≤10mm.
4. The sleeve according to claim 1, wherein The drainage trough unit (11) comprises a plurality of annular grooves (112), and the annular grooves (112) extend along the circumference of the sleeve; The projection of any one of the annular grooves (112) and another one of the annular grooves (112) on the projection surface at least partially overlaps, and the combined projection of the plurality of annular grooves (112) on the projection surface can cover the entire projection of the sleeve on the projection surface.
5. The sleeve according to claim 4, characterized in that Along the axial direction of the sleeve, the spacing H between two adjacent annular grooves (112) satisfies 5mm≤H≤10mm; And / or, the length S of the annular groove (112) along the circumference of the sleeve and the circumference T of the sleeve satisfy 1 / 4≤S / T≤1 / 3.
6. The sleeve according to claim 1, wherein The drainage trough unit (11) comprises a plurality of strip-shaped grooves (113), and the strip-shaped grooves (113) extend along the axial direction of the sleeve; The projection of any one of the strip grooves (113) and another strip groove (113) on the projection surface at least partially overlaps, and the combined projection of multiple strip grooves (113) on the projection surface can cover the entire projection of the sleeve on the projection surface.
7. The sleeve according to claim 1, wherein: The sleeve is coated with a hydrophobic coating.
8. The sleeve according to claim 1, wherein The sleeve is a plastic part.
9. A heat exchanger, characterized in that: It comprises a pull rod (30) and a sleeve according to any one of claims 1 to 8, wherein the sleeve is sleeved on the outer periphery of the pull rod (30) and is clearance-matched with the pull rod (30).
10. The heat exchanger according to claim 9, characterized in that The distance I between the inner wall of the sleeve and the outer wall of the pull rod (30) satisfies 0.5mm≤I≤0.8mm.