Sealing structure and hairpin type heat exchanger

Abstract

The utility model discloses a sealing structure and a hairpin type heat exchanger, relates to the technical field of heat exchangers, and mainly aims to improve the sealing performance of a connecting part of a first carrier and a second carrier. According to the main technical scheme, the sealing structure comprises a first carrier and a second carrier, a first flange is arranged on the first carrier, a second flange is arranged on the second carrier, the first flange is connected with the second flange, a sealing ring is arranged between the first flange and the second flange, and the first flange is connected with the second flange. First sealing grooves are formed in the positions, opposite to the sealing ring, of the first flange and the second flange, and first sealing gaskets are arranged in the first sealing grooves.

Description

Technical Field

[0001] The present application belongs to the technical field of heat exchangers, and specifically relates to a sealing structure and a hairpin heat exchanger. Background Art

[0002] The reliability of sealing structures is crucial in industrial production and many technical applications. Especially in heat exchange equipment, good sealing performance is not only related to the normal operation of the equipment, but also directly affects energy efficiency and production safety.

[0003] Traditional heat exchanger sealing structures often present numerous problems. For example, when connecting two carriers, simple flange connections lack effective sealing measures, which can easily lead to medium leakage. Such leakage not only wastes energy but can also pollute the environment and even cause safety accidents. Utility Model Content

[0004] In view of this, the present application provides a sealing structure and a hairpin heat exchanger, the main purpose of which is to improve the sealing performance of the connection portion between the first carrier and the second carrier.

[0005] To achieve the above objectives, this application mainly provides the following technical solutions:

[0006] In a first aspect of the present application, a sealing structure is provided, including a first carrier and a second carrier, wherein a first flange is provided on the first carrier, a second flange is provided on the second carrier, the first flange is connected to the second flange, a sealing ring is provided between the first flange and the second flange, a first sealing groove is provided on the first flange and the second flange at a position relative to the sealing ring, and a first sealing gasket is provided in the first sealing groove.

[0007] Optionally, an adapter plate is provided between the first carrier and the second carrier, and a positioning groove is provided on the outer circumferential surface of the adapter plate along the circumferential direction of the adapter plate. The sealing ring is located in the positioning groove, and at least part of the sealing ring extends out of the positioning groove and abuts against the first sealing gasket.

[0008] Optionally, the sealing ring is a split structure, and the sealing ring includes a first half ring and a second half ring.

[0009] Optionally, a second sealing groove is provided at the junction of the first half ring and the second half ring, and a second sealing gasket is provided in the second sealing groove.

[0010] Optionally, the first sealing gasket and the second sealing gasket are made of elastic material.

[0011] Optionally, asbestos fibers and metal reinforcing wires are provided in the first sealing gasket and the second sealing gasket.

[0012] Optionally, the first sealing gaskets in the two first sealing grooves have different temperature resistance grades.

[0013] Optionally, when the sealing structure is used in a hairpin heat exchanger, the temperature resistance level of the first sealing gasket close to the hairpin heat exchanger housing is higher than the temperature resistance level of the first sealing gasket close to the hairpin heat exchanger tube box.

[0014] Optionally, the first flange and the second flange are fastened by bolts.

[0015] In a second aspect of the present application, a hairpin heat exchanger is provided, comprising any one of the sealing structures described above.

[0016] By means of the above technical solution, this application has at least the following beneficial effects:

[0017] Embodiments of the present application provide a sealing structure and a hairpin heat exchanger. By connecting a first flange to a second flange, disposing a sealing ring therebetween, and providing a first sealing groove and a first sealing gasket on the first and second flanges at positions relative to the sealing ring, a multi-sealing structure is formed, effectively preventing leakage at the connection between the first and second carriers. Furthermore, when the sealing structure is used in a hairpin heat exchanger, the first carrier is the hairpin heat exchanger's housing, the second carrier is the hairpin heat exchanger's manifold, the first flange is the housing flange, and the second flange is the manifold flange. This sealing structure ensures that the hairpin heat exchanger maintains a good seal during operation, improving the reliability and safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a sealing structure of an optional embodiment of the present application.

[0019] The reference numerals indicate:

[0020] 1. First carrier; 2. Second carrier; 3. First flange; 4. Second flange; 5. Sealing ring; 6. First sealing groove; 7. First sealing gasket; 8. Adapter plate. DETAILED DESCRIPTION

[0021] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0022] 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 one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0023] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0024] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application and are not used to limit the present application.

[0025] An embodiment of the first aspect of the present application provides a sealing structure, and an embodiment of the second aspect of the present application provides a hairpin heat exchanger.

[0026] Among them, the sealing structure is used for the hairpin heat exchanger.

[0027] Specifically, the hairpin heat exchanger includes a shell, a tube box, and a tube sheet. The shell is the main structure of the hairpin heat exchanger and provides a stable external environment for the heat exchange process. The tube box is used to guide the inflow and outflow of the heat exchange medium, ensuring that the medium can exchange heat according to the preset process. The tube sheet plays a connecting role in the hairpin heat exchanger. On the one hand, it can fix the heat exchange tubes, and on the other hand, it can tightly connect the shell and the tube box together. The sealing structure in this application is arranged at the connection between the shell and the tube box to improve the sealing performance of the hairpin heat exchanger and ensure the efficient and stable heat exchange process.

[0028] See also Figure 1 As shown, the sealing structure provided by the embodiment of the first aspect of the present application includes a first carrier 1 and a second carrier 2, a first flange 3 is provided on the first carrier 1, a second flange 4 is provided on the second carrier 2, the first flange 3 is connected to the second flange 4, a sealing ring 5 is provided between the first flange 3 and the second flange 4, and a first sealing groove 6 is provided on the first flange 3 and the second flange 4 at a position relative to the sealing ring 5, and a first sealing gasket 7 is provided in the first sealing groove 6.

[0029] In this embodiment, by connecting the first flange 3 and the second flange 4, disposing a sealing ring 5 therebetween, and providing a first sealing groove 6 and a first sealing gasket 7 on the first and second flanges 3 and 4 at positions relative to the sealing ring 5, a multi-sealing structure is formed, effectively preventing leakage at the connection between the first carrier 1 and the second carrier 2. Furthermore, when the sealing structure is used in a hairpin heat exchanger, the first carrier 1 is the housing of the hairpin heat exchanger, the second carrier 2 is the pipe box of the hairpin heat exchanger, the first flange 3 is the housing flange, and the second flange 4 is the pipe box flange. This sealing structure ensures that the hairpin heat exchanger maintains a good seal during operation, improving the reliability and safety of the equipment.

[0030] The first flange 3 is located at one end of the first carrier 1 close to the second carrier 2, and the second flange 4 is located at one end of the second carrier 2 close to the first carrier 1. The first flange 3 and the second flange 4 are connected to each other, and can connect the first carrier 1 and the second carrier 2.

[0031] Specifically, in some specific examples, bolt holes are distributed throughout the first flange 3 and the second flange 4, and the first flange 3 and the second flange 4 are fastened together by bolts. It is understood that bolted fastening provides a strong connection force, tightly binding the first flange 3 (e.g., the shell flange) and the second flange 4 (e.g., the manifold flange) together. During operation of the hairpin heat exchanger, subjected to the pressure of the internal heat exchange medium and various external environmental forces, this fastening method ensures that the first flange 3 and the second flange 4 will not easily separate, thus ensuring a secure and stable connection.

[0032] A roughly annular sealing ring 5 is installed between the first flange 3 and the second flange 4. One side of the sealing ring 5 fits tightly against the first flange 3, while the other side fits tightly against the second flange 4, also in contact. In this way, the sealing ring 5 creates a seal at the junction of the first and second flanges 3 and 4. Its function is to effectively prevent fluids and other substances from leaking out of the connection between the first and second flanges 3 and 4, ensuring a tight seal and reliably guaranteeing the normal operation of the equipment.

[0033] It should be noted that there are two possible connection methods between the sealing ring 5 and the first and second flanges 3 and 4. One is that the sealing ring 5 directly abuts the first and second flanges 3 and 4, meaning that both sides of the sealing ring 5 are tightly attached to the surfaces of the first and second flanges 3 and 4, without any intervening material. In this case, the sealing ring 5 forms a seal at the connection between the first and second flanges 3 and 4 through direct contact, preventing leakage of fluids and other substances. The other is that the sealing ring 5 abuts the first and second flanges 3 and 4 with an interval. This means that some specific material or structure exists between the sealing ring 5 and the first and second flanges 3 and 4, preventing direct contact between the sealing ring 5 and the first and second flanges 3 and 4. Instead, the sealing ring 5 abuts the first and second flanges 3 and 4 through these intervening materials. This interval abutment method may leverage the special properties of the intervening material to further enhance the sealing effect or adapt to specific operating conditions and requirements.

[0034] Specifically, in this embodiment, the sealing ring 5 is spaced apart and abutted against the first flange 3 and the second flange 4. A first sealing groove 6 is formed on the first flange 3 and the second flange 4 at a position relative to the sealing ring 5, and a first sealing gasket 7 is disposed in the first sealing groove 6. In actual application, when the first flange 3 and the second flange 4 are connected, the first sealing gasket 7 is firmly fixed in the sealing groove and does not easily shift. The first sealing gasket 7 can be made of a material with excellent elasticity and sealing properties, such as rubber, polytetrafluoroethylene, etc. During the flange connection process, the first sealing gasket 7 is squeezed by the first flange 3 and the second flange 4, undergoing elastic deformation, thereby tightly filling the gap between the sealing ring 5 and the flanges.

[0035] In some possible embodiments disclosed in the present application, the first sealing gasket 7 is an O-ring, and asbestos fibers and metal reinforcing wires are provided in the first sealing gasket 7 .

[0036] Asbestos fiber has excellent flexibility and compressibility. When the first sealing gasket 7 is squeezed by the first flange 3 and the second flange 4, the asbestos fiber can tightly fill the sealing groove and the gap between the sealing ring 5 and the flange, adapting to different surface shapes and pressure distributions, effectively preventing the leakage of fluids and other substances. Asbestos fiber is also resistant to high temperatures and corrosion. In the operating environment of a hairpin heat exchanger, it may be exposed to high-temperature heat exchange media and various corrosive substances. Asbestos fiber can maintain stable performance under such harsh conditions, ensuring that the sealing effect of the gasket is not affected.

[0037] The metal reinforcement wire increases the overall strength and rigidity of the first gasket 7, preventing it from excessive deformation or damage when subjected to pressure or external forces. Particularly in high-pressure environments, the metal reinforcement wire can withstand some of the pressure, alleviating the burden on the asbestos fibers and maintaining the shape and sealing performance of the first gasket 7. Specifically, when the flange connection is tightened, the metal reinforcement wire prevents the first gasket 7 from excessive compression and loss of elasticity, thereby ensuring that the first gasket 7 continues to perform effectively in long-term use.

[0038] In some possible implementations disclosed in this application, Figure 1 As shown, an adapter plate 8 is arranged between the first carrier 1 and the second carrier 2, and a positioning groove is opened on the outer surface of the adapter plate 8 along the circumferential direction of the adapter plate 8. The sealing ring 5 is located in the positioning groove, and at least part of the sealing ring 5 extends out of the positioning groove and abuts against the first sealing gasket 7.

[0039] In this embodiment, the positioning groove provides a clear installation location for the sealing ring 5, ensuring that the sealing ring 5 is accurately and stably positioned between the first carrier 1 and the second carrier 2. During operation of the device, the sealing ring 5 will not easily shift due to vibration, pressure changes, or other external factors, thereby ensuring the reliability of the sealing structure.

[0040] When the sealing structure is used for a hairpin heat exchanger, the adapter plate 8 is the tube plate of the hairpin heat exchanger.

[0041] The positioning groove is specifically an annular groove. In actual use, this groove serves to position the sealing ring 5, providing a secure, fixed position for the ring. This ensures that the ring 5 remains in its pre-set position and is protected from axial movement due to equipment operation, vibration, or other external forces. This ensures that the sealing ring 5 maintains a stable and continuous sealing effect, effectively preventing leakage of fluids or other substances from the connection between the first carrier 1 and the second carrier 2, and supporting the reliability and stability of the entire sealing structure.

[0042] Specifically, when the first and second carriers 1 and 2 are connected, the adapter plate 8 is positioned between them. While the sealing ring 5 is secured within the positioning groove, its extended portion comes into close contact with the first sealing gasket 7, forming a sealed bond and further enhancing the sealing properties of the entire sealing structure. In other words, the sealing ring 5 and the first sealing gasket 7 cooperate to prevent fluids or other substances from leaking from the connection between the first and second carriers 1 and 2.

[0043] In some possible embodiments disclosed in the present application, the sealing ring 5 is a split structure, and the sealing ring 5 includes a first half ring and a second half ring.

[0044] In this embodiment, the split first and second half rings can be installed separately into the positioning grooves, eliminating the need to handle the entire sealing ring 5 at once, thus reducing the difficulty of installing the sealing ring 5. Furthermore, if one half ring is damaged, it can be replaced independently without replacing the entire sealing ring 5, thus reducing costs.

[0045] The first half ring and the second half ring are approximately semicircular in shape. When the first half ring and the second half ring are combined together, a complete sealing ring 5 can be formed.

[0046] In the above embodiment, a second sealing groove is formed at the junction of the first half ring and the second half ring, and a second sealing gasket is provided in the second sealing groove.

[0047] In this embodiment, by providing a second sealing gasket at the junction of the first half ring and the second half ring, the sealing performance of the split sealing ring 5 can be improved, leakage at the junction of the first half ring and the second half ring can be prevented, and the sealing performance of the sealing structure can be improved.

[0048] The second sealing groove can be a rectangular groove, etc., which can accommodate the second sealing gasket, and this application does not limit this. In actual application, when the first half ring and the second half ring are spliced ​​together, the second sealing gasket is fixed in the second sealing groove at the joint.

[0049] Among them, the second sealing gasket can be made of a material with good elasticity and sealing performance, such as rubber, polytetrafluoroethylene, etc. When the first half ring is combined with the second half ring, the second sealing gasket can fit tightly in the second sealing groove and on the joint surface of the first half ring and the second half ring, adapting to different pressures and shape changes. It should be noted that when slight vibrations or temperature fluctuations occur during the operation of the equipment, the second sealing gasket can maintain a good sealing state through its own elastic restoring force, effectively preventing the occurrence of leakage. In addition, asbestos fibers and metal reinforcing wires are also provided in the second sealing gasket. The role of asbestos fibers and metal reinforcing wires in the second sealing gasket is similar to that of asbestos fibers and metal reinforcing wires in the first sealing gasket 7, which has been explained in detail above and will not be repeated here.

[0050] In some possible embodiments disclosed in the present application, the first sealing gaskets 7 in the two first sealing grooves 6 have different temperature resistance grades.

[0051] It should be noted that in equipment such as hairpin heat exchangers, different areas may be exposed to varying temperature environments. By providing first gaskets 7 with different temperature resistance ratings, the sealing structure can better adapt to these temperature differences. For example, the sealing area near the high-temperature heat exchange medium may require a first gasket 7 with a higher temperature resistance rating, while the relatively cooler area on the other side may use a first gasket 7 with a slightly lower temperature resistance rating but better performance at that temperature.

[0052] In the above embodiment, when the sealing structure is used for a hairpin heat exchanger, the temperature resistance level of the first sealing gasket 7 close to the hairpin heat exchanger housing is higher than that of the first sealing gasket 7 close to the hairpin heat exchanger tube box.

[0053] It should be noted that during operation, the shell of a hairpin heat exchanger is typically exposed to a relatively high-temperature heat exchange medium, while the temperature at the pipe box is relatively low. Positioning a first gasket 7 with a higher temperature resistance rating near the shell allows for better adaptation to high-temperature environments, maintaining good elasticity and sealing properties, and preventing high temperatures from causing the first gasket 7 to age, deform, or lose its sealing effectiveness. Simultaneously, using a first gasket 7 with a slightly lower temperature resistance rating near the pipe box not only meets the relatively low temperature requirements of that area, but also avoids the unnecessary cost and performance overload that might result from using a first gasket 7 with an excessively high temperature resistance rating in low-temperature areas.

[0054] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0055] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application. The above are merely preferred embodiments of the present application. It should be noted that those skilled in the art may make various improvements and variations without departing from the technical principles of the present application, and such improvements and variations shall also be considered within the scope of protection of the present application.

Claims

1. A sealing structure, characterized in that: The invention comprises a first carrier (1) and a second carrier (2), wherein a first flange (3) is provided on the first carrier (1), a second flange (4) is provided on the second carrier (2), the first flange (3) and the second flange (4) are connected, a sealing ring (5) is provided between the first flange (3) and the second flange (4), a first sealing groove (6) is provided on each of the first flange (3) and the second flange (4) at a position relative to the sealing ring (5), and a first sealing gasket (7) is provided in the first sealing groove (6); An adapter plate (8) is provided between the first carrier (1) and the second carrier (2), and a positioning groove is provided on the outer peripheral surface of the adapter plate (8) along the circumferential direction of the adapter plate (8), the sealing ring (5) is located in the positioning groove, and at least a portion of the sealing ring (5) extends out of the positioning groove and abuts against the first sealing gasket (7).

2. The sealing structure according to claim 1, wherein: The sealing ring (5) is a split structure, and comprises a first half ring and a second half ring.

3. The sealing structure according to claim 2, characterized in that: A second sealing groove is formed at the junction of the first half ring and the second half ring, and a second sealing gasket is provided in the second sealing groove.

4. The sealing structure according to claim 3, characterized in that: The first sealing gasket (7) and the second sealing gasket are made of elastic material.

5. The sealing structure according to claim 4, characterized in that: Asbestos fibers and metal reinforcing wires are provided in the first sealing gasket (7) and the second sealing gasket.

6. The sealing structure according to claim 1, wherein: The first sealing gaskets (7) in the two first sealing grooves (6) have different temperature resistance grades.

7. The sealing structure according to claim 6, characterized in that: When the sealing structure is used in a hairpin heat exchanger, the temperature resistance level of the first sealing gasket (7) close to the hairpin heat exchanger housing is higher than the temperature resistance level of the first sealing gasket (7) close to the hairpin heat exchanger tube box.

8. The sealing structure according to claim 1, wherein: The first flange (3) and the second flange (4) are fastened by bolts.

9. A hairpin heat exchanger, characterized in that: The sealing structure comprises the sealing structure as described in any one of claims 1 to 8.

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