Floating tube sheet and floating head heat exchanger

Abstract

The utility model is suitable for heat exchanger technical field provides a kind of floating tube sheet, the floating tube sheet is arranged to disc structure, the flange hole is opened around one week of floating tube sheet, the flange hole is penetrated and is opened, two groups of plate hole groups are formed on the floating tube sheet, two groups of plate hole groups are symmetrically arranged, a plurality of plate hole groups are opened in the plate hole group, the plate hole is penetrated and is opened, the sealing groove is opened around the outer lateral wall of floating tube sheet one week, O type sealing ring is placed in the sealing groove.The utility model solves the problem that existing floating tube sheet sealing structure is single, sealing strip is easily aged and deformed to cause leakage, realizes the effect that structure is compact, sealing is reliable and pressure resistance is strong.The utility model also discloses a floating head heat exchanger with the floating tube sheet.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, and more specifically, to a floating tube sheet and a floating head heat exchanger. Background Technology

[0002] Floating head heat exchangers are a common type of detachable shell-and-tube heat exchange equipment, widely used in industries such as petrochemicals, energy, power, and metallurgy. These heat exchangers typically consist of a shell, tube sheet, heat exchange tubes, floating head, and tube box. The floating head structure allows the tube bundle to expand and contract freely during thermal expansion and contraction, preventing the heat exchange tubes from deforming under tension or compression due to temperature changes, thus ensuring long-term stable operation of the equipment.

[0003] In floating head heat exchangers, the floating tube sheet is a crucial component connecting the floating head to the shell, primarily supporting the heat exchange tubes and ensuring a seal between the tube bundle and the shell. In existing technologies, floating tube sheets often employ a single sealing groove structure, with a sealing strip placed within the groove to achieve a seal. However, under conditions of high temperature, high pressure, or corrosive media, single-layer sealing strips are prone to aging, deformation, or leakage, leading to seal failure. For example, CN220625019U discloses a floating tube sheet structure for a heat exchanger, which still uses a single sealing groove arrangement for sealing. The sealing effect relies on the elastic recovery capability of the sealing strip, making it difficult to maintain a stable seal under complex operating conditions.

[0004] Therefore, based on the above technical solution, this application proposes a floating tube sheet and a floating head heat exchanger. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a floating tube sheet and a floating head heat exchanger.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A floating tube sheet and a floating head heat exchanger include a floating tube sheet configured as a disc structure. The floating tube sheet has flange holes circumferentially arranged around its perimeter, and the flange holes are through-holes. Two sets of plate hole groups are formed on the floating tube sheet and are symmetrically arranged. Several sets of plate holes are formed on each set of plate holes, and the plate holes are through-holes. A sealing groove is formed around the outer wall of the floating tube sheet, and an O-ring seal is placed in the sealing groove.

[0008] The present invention is further configured such that the two sets of plate hole groups are configured as a semi-circular structure.

[0009] The present invention is further configured such that: the sealing groove is configured as a groove with staggered thickness, and a set of O-rings are placed in the sealing groove.

[0010] The present invention is further configured such that the sealing groove is formed as a groove of uniform thickness.

[0011] The present invention is further configured such that a matching sealing ring is fitted on the sealing groove, and the matching sealing ring is slidably disposed relative to the sealing groove.

[0012] The present invention is further configured such that: the mating sealing ring includes a spring, and baffles are fixedly connected to both ends of the spring; and a set of O-rings are respectively placed in the gap between the two sets of baffles and the sealing groove.

[0013] The present invention is further configured such that: a floating head is connected to a flange on one side of the floating tube sheet, the floating head includes a floating head body, the floating head body is configured as a hemispherical structure, and a flange is fixedly connected to one end of the floating head body, the flange being adapted to the shape of the flange hole.

[0014] A floating head heat exchanger includes a floating tube sheet as described above, and also includes a shell. The O-ring abuts against the inner wall of the shell, and a flange at one end of the shell is connected to a tube head configured as a hemispherical structure, with the tube head covering the outside of the floating head.

[0015] In summary, this application includes at least one of the following beneficial technical effects:

[0016] 1. This utility model achieves multi-level adjustable sealing by setting a sealing groove structure with staggered thicknesses on the outer periphery of the floating tube sheet, and combining O-rings, mating sealing rings, and elastic pre-tightening components in different embodiments. This structure significantly improves the sealing performance and pressure resistance of the floating head end, avoiding the problems of aging and leakage associated with traditional single O-rings.

[0017] 2. The floating tube sheet of this utility model adopts a symmetrical semi-circular plate hole group design and a variable thickness structure, which not only ensures the uniformity and stability of the stress during heat exchange tube insertion, but also facilitates the selection of different sealing schemes according to different operating conditions, and realizes modular assembly. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of a first embodiment of the floating tube sheet of this utility model.

[0019] Figure 2 This is a schematic diagram of a second embodiment of the floating tube sheet of this utility model.

[0020] Figure 3 for Figure 2 Side view.

[0021] Figure 4 for Figure 3 A sectional view taken along section AA.

[0022] Figure 5 for Figure 4 A magnified view of a portion of region B in the middle.

[0023] Figure 6 This is a schematic diagram of the floating head heat exchanger of this utility model.

[0024] Explanation of reference numerals in the attached drawings: 1. Floating tube sheet; 11. Flange hole; 12. Plate hole group; 13. Plate hole; 14. Sealing groove; 2. Matching sealing ring; 21. Baffle; 22. Spring; 3. Floating head; 31. Floating head body; 32. Flange; 4. Pipe head; 5. Outer shell. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0027] Example 1, please refer to Figure 1-6 The present invention provides the following technical solution:

[0028] Specifically, this refers to a floating tube sheet 1, which is configured as a disc structure. The diameter of the floating tube sheet 1 is determined according to the dimensions of the floating head heat exchanger shell. The floating tube sheet 1 is preferably made of corrosion-resistant and high-strength metallic materials, such as carbon steel, austenitic stainless steel, titanium alloy, or duplex stainless steel. These materials possess good tensile strength, ductility, and resistance to thermal deformation, enabling them to maintain a stable structure under high temperature and high pressure conditions and prevent sealing failure caused by thermal expansion and contraction. In this example, carbon steel is preferred.

[0029] The floating tube sheet 1 has several flange holes 11 around its circumference. The flange holes 11 are through structures and are used to connect the floating tube sheet 1 to external structural components by bolts or studs to ensure reliable sealing and installation strength of the floating end.

[0030] Two sets of perforation groups 12 are formed in the middle of the floating tube sheet 1, and the two sets of perforation groups 12 are symmetrically arranged with the center of the floating tube sheet as the axis of symmetry. Each set of perforation groups 12 has several perforations 13, which penetrate the floating tube sheet 1 and are used to insert heat exchange tubes, allowing the fluid to transfer heat through the heat exchange tubes. The two sets of perforation groups 12 are generally arranged in a semi-circular structure, and the thickness of the perforation groups is greater than that of the rest of the floating tube sheet 1, ensuring the strength of the perforation groups 13 and the stability of the heat exchange tube insertion.

[0031] A sealing groove 14 is formed around the outer perimeter of the floating tube sheet 1. The sealing groove 14 is used to place an O-ring seal, thereby forming a sealed connection between the floating tube sheet and the outer shell. Preferably, the sealing groove 14 is configured as a groove structure with staggered thicknesses, that is, the inner wall of the sealing groove is composed of stepped segments of different depths. This structure can generate a multi-stage sealing effect after the O-ring seal is compressed, further enhancing the sealing performance. At the same time, it can buffer displacement under thermal stress, improving the overall pressure resistance and sealing stability.

[0032] In use, the floating tube sheet 1 in this embodiment is installed inside the floating head end of the floating head heat exchanger. This utility model also provides a floating head heat exchanger with the floating tube sheet 1, wherein the floating head heat exchanger further includes a housing 5, the floating tube sheet 1 is installed inside the housing 5, and an O-ring seal is located within the sealing groove 14 and abuts against the inner wall of the housing 5 to achieve a reliable seal.

[0033] One end of the outer casing 5 is connected to a pipe head 4 via a flange. The pipe head 4 is configured with a hemispherical structure to withstand the impact force of high-pressure fluid. The pipe head 4 covers the outside of the float head 3 to form an independent float head chamber.

[0034] One side of the floating tube sheet 1 is connected to the floating head 3 via a flange. The floating head 3 includes a floating head body 31, which is also a hemispherical structure. One end of the floating head body 31 is fixedly connected to a flange 32, and the shape and hole spacing of the flange 32 match those of the flange holes 11 on the floating tube sheet 1. Through this structural design, a reliable disassembly and assembly connection is achieved between the floating tube sheet and the floating head, ensuring sealing performance and facilitating subsequent maintenance and cleaning operations.

[0035] Example 2: In certain scenarios with high sealing performance requirements, such as heat exchange environments with high pressure, high temperature, or strong corrosive media, it may be difficult to achieve the desired sealing effect using only O-rings. Therefore, in this example, the structure of the sealing groove 14 is improved during the forging and processing of the floating tube sheet to form an enhanced sealing structure.

[0036] Specifically, the sealing groove 14 is a groove structure with a uniform thickness, and a matching sealing ring 2 is sleeved inside the sealing groove 14. The matching sealing ring 2 can be slidably set relative to the sealing groove 14 to adapt to the slight displacement caused by thermal expansion or mechanical vibration, thereby maintaining stable sealing performance.

[0037] The sealing ring 2 includes a spring 22, with baffles 21 fixedly connected to both ends of the spring 22. A gap is left between the two sets of baffles 21 and the groove wall of the sealing groove 14, and an O-ring is placed in the gap.

[0038] During assembly, the operator first inserts a set of O-rings into the gap between the two sets of baffles 21 and the sealing groove wall, and then manually pushes the baffles 21 to generate axial compression force on the spring 22. At this time, the spring 22 presses the O-rings tightly against the contact surface between the inner wall of the outer shell and the floating tube sheet, forming an elastic seal.

[0039] In the overall assembled state, spring 22 provides elastic preload, keeping the O-ring under constant pressure. Under the action of elastic force, the O-ring deforms, causing the volume of the O-ring overflowing from the sealing groove 14 to increase, and continuously compressing the connection part, thereby forming a highly efficient sealing structure.

[0040] Example 3: In some scenarios where sealing requirements are not high, such as heat exchange environments with low pressure, normal temperature, or non-corrosive media, a simplified structure can be adopted to reduce manufacturing costs.

[0041] Specifically, the sealing groove 14 is a groove of uniform thickness, and only one set of O-rings is placed inside. This structure is simple, has low manufacturing requirements, is easy to install and replace quickly, and can meet the basic sealing requirements under general industrial heat exchange conditions.

[0042] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] It should be understood that the terms "length", "width", "up", "down", "front and back", "left and right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0044] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the scope of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A floating tube sheet, characterized in that: The floating tube sheet (1) is configured as a disc structure. Flange holes (11) are opened around the perimeter of the floating tube sheet (1). The flange holes (11) are opened through the tube sheet. Two sets of plate hole groups (12) are formed on the floating tube sheet (1). The two sets of plate hole groups (12) are symmetrically arranged. Several sets of plate holes (13) are opened on the plate hole groups (12). The plate holes (13) are opened through the tube sheet. A sealing groove (14) is opened around the outer wall of the floating tube sheet (1). An O-ring is placed in the sealing groove (14).

2. A floating tube sheet according to claim 1, characterized in that: The two sets of plate hole groups (12) are configured as semi-circular structures.

3. A floating tube sheet according to claim 1, characterized in that: The sealing groove (14) is configured as a groove with staggered thickness, and a set of O-rings are placed in the sealing groove (14).

4. A floating tube sheet according to claim 1, characterized in that: The sealing groove (14) is formed as a groove of uniform thickness.

5. A floating tube sheet according to claim 4, characterized in that: A matching sealing ring (2) is fitted on the sealing groove (14), and the matching sealing ring (2) is slidably disposed relative to the sealing groove (14).

6. A floating tube sheet according to claim 5, characterized in that: The mating sealing ring (2) includes a spring (22), and baffles (21) are fixedly connected to both ends of the spring (22). A set of O-rings are placed in the gap between the two sets of baffles (21) and the sealing groove (14).

7. A floating tube sheet according to claim 1, characterized in that: The floating tube sheet (1) has a flange connected to a floating head (3) on one side. The floating head (3) includes a floating head body (31). The floating head body (31) is set as a hemispherical structure. A flange (32) is fixedly connected to one end of the floating head body (31). The flange (32) is adapted to the shape of the flange hole (11).

8. A floating head heat exchanger, comprising a floating tube sheet as described in any one of claims 1-7, characterized in that: It also includes a housing (5), the O-ring abuts against the inner wall of the housing (5), and a pipe head (4) with a hemispherical structure connected to a flange at one end of the housing (5), the pipe head (4) covering the outside of the floating head (3).

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