Novel floating tube plate sealing structure and heat exchanger

Abstract

The utility model relates to a novel floating tube plate sealing structure and a heat exchanger, the sealing structure comprises a floating tube plate, a support ring plate, a fixing assembly and a plurality of sliding bosses, the plurality of sliding bosses are uniformly and fixedly arranged at intervals in the circumferential direction, and the fixing assembly is fixedly arranged and located on one side of one end of each sliding boss; the floating tube plate is located on the inner sides of the multiple sliding bosses and slidably connected with the multiple sliding bosses through sliding pieces, and the floating tube plate is fixedly connected with the fixing assembly through the supporting ring plate. The sealing device has the advantages of being simple in structure, reasonable in design, suitable for being used in all heat exchangers with floating tube plates, better in sealing effect, capable of improving reliability of equipment, reducing the risk that the device is forced to stop, improving production benefits and reducing production cost. The problems that the floating tube plate end of a large heat exchanger with the large temperature difference leaks seriously, and heat exchange tubes are broken due to jamming of the floating tube plate in the sliding process are effectively solved.

Description

Technical Field

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

[0002] Currently, dehydrogenation units in large-scale styrene plants typically employ horizontal triple heat exchangers, including an ethylbenzene superheater, a low-pressure waste heat recovery heat exchanger, and a low-low-pressure waste heat recovery heat exchanger. The ethylbenzene superheater is a crucial piece of equipment, characterized by a significant temperature difference between its tubes and shell. One end of the tube bundle is connected to a fixed tube sheet, while the other end connects to a floating tube sheet. The front tube sheet uses a welded fixed type, while the rear sliding tube sheet employs an asymmetric tube sheet with a stuffing box seal. One end of the stuffing box connects to the floating tube sheet, and its side is tightly pressed against the shell to form a seal, compensating for the thermal expansion difference between the heat exchange tubes and the shell-side cylinder. However, the stuffing box seal in horizontal equipment is in a circumferentially unbalanced state. Due to the weight of the floating tube sheet and tube bundle, the lower packing is relatively more compressed, while the upper packing is relatively loose, making leakage almost inevitable. This leakage increases dramatically, especially after repeated heating and cooling operations. Furthermore, if the floating tube sheet becomes stuck during sliding, it can lead to heat exchange tube breakage, causing equipment failure and forcing a unit shutdown. Utility Model Content

[0003] This invention provides a novel floating tube sheet sealing structure and heat exchanger, aiming to solve the problems in the prior art.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0005] A novel floating tube sheet sealing structure includes a floating tube sheet, a support ring plate, a fixing component, and multiple sliding bosses. The multiple sliding bosses are fixedly arranged at uniform intervals around the periphery. The fixing component is fixedly arranged and located on one side of one end of the multiple sliding bosses. The floating tube sheet is located inside the multiple sliding bosses and is slidably connected to the multiple sliding bosses respectively through sliding members. The floating tube sheet is fixedly connected to the fixing component through the support ring plate.

[0006] The beneficial effects of this utility model are as follows: During use, heat exchange tubes are assembled on the floating tube sheet. The thermal expansion difference of the heat exchange tubes causes the floating tube sheet to undergo slight displacement. During this process, the floating tube sheet is slidably connected to the sliding boss by the sliding component, and the floating tube sheet is connected to the fixed component through the support ring plate, which ensures that the floating tube sheet slides stably and will not cause jamming.

[0007] This utility model has a simple structure and reasonable design, and is applicable to all heat exchangers with floating tube sheets. It has a better sealing effect, improves the reliability of the equipment, reduces the risk of forced shutdown of the unit, improves production efficiency, and effectively solves the problems of serious leakage at the floating tube sheet end of large heat exchangers with large temperature differences and heat exchange tube breakage caused by "jamming" of the floating tube sheet during sliding.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the floating tube sheet has a circular plate-like structure, and the fixing component includes a cylindrical clamping ring plate that is closed at one end and open or closed at the other end. The clamping ring plate is fixedly installed and located on one side of one end of the plurality of sliding bosses, and its other end is fixedly connected to the floating tube sheet through the supporting ring plate.

[0010] The advantages of adopting the above-mentioned further scheme are that the structure is simple and the design is reasonable. The stable assembly of the floating tube sheet can be ensured by using the cooperation of the clamping ring plate and the support ring plate.

[0011] Furthermore, it also includes an annular reinforcing section, which is fixedly disposed on one side of one end of the plurality of sliding bosses, and the clamping ring plate is fixedly installed inside the reinforcing section.

[0012] The advantages of adopting the above-mentioned further solutions are that the structure is simple, the design is reasonable, and the setting of the reinforcing section can enhance the strength of the entire sealing structure.

[0013] Furthermore, the support ring plate has an annular retaining ring on the side near the reinforcing section, and the retaining ring is close to the reinforcing section; the retaining ring, the support ring plate, the clamping ring plate, and the reinforcing section form a filling area, and the filling area is filled with a filler layer.

[0014] The advantages of adopting the above-mentioned further scheme are that the structure is simple and the design is reasonable. The design of the packing layer can increase the sealing effect on the one hand, and play a certain buffering role on the movement of the floating tube sheet on the other hand.

[0015] Furthermore, the other end of the clamping ring plate is open, and the supporting ring plate has a cylindrical structure. One end of the supporting ring plate is fixedly connected to the floating tube plate, and the other end extends into the clamping ring plate and is provided with a protrusion. The protrusion is fixedly connected to the clamping ring plate by bolts.

[0016] The advantages of adopting the above-mentioned further solution are that the shape design of the clamping ring plate and the support ring plate is reasonable, which facilitates assembly and saves time and effort.

[0017] Furthermore, one end of the support ring plate is open and the other end is closed, and the other end of the support ring plate and one end of the clamping ring plate are provided with through holes for the medium to pass through.

[0018] The advantages of adopting the above-mentioned further scheme are that it has a simple structure, reasonable design, and ensures that the heat exchange medium can smoothly enter the heat exchange tubes fixedly installed on the floating tube sheet.

[0019] Furthermore, the sliding member includes multiple support plates, which are evenly spaced along the circumference of the floating tube plate and are slidably connected to the multiple sliding bosses respectively.

[0020] The advantage of adopting the above-mentioned further solution is that the number of support plates is set reasonably, which further ensures the stable sliding of the floating tube sheet and avoids jamming.

[0021] Furthermore, each of the aforementioned support plates has a rod-like structure.

[0022] The advantage of adopting the above-mentioned further solution is that the shape design of the support plate is reasonable, which facilitates both the connection of the floating tube sheet and the sliding engagement with the sliding boss.

[0023] This utility model also relates to a heat exchanger, including the novel floating tube sheet sealing structure described above.

[0024] The beneficial effect of adopting the above-mentioned further solutions is that this utility model also provides a heat exchanger with a simple structure and reasonable design. It is suitable for use in large heat exchangers with floating tube sheets, has a better sealing effect, improves the reliability of the equipment, reduces the risk of forced shutdown of the unit, improves production efficiency, and effectively solves the problems of serious leakage at the floating tube sheet end of large heat exchangers with large temperature differences and heat exchange tube breakage caused by "jamming" of the floating tube sheet during sliding.

[0025] Furthermore, it also includes a cylindrical shell, with multiple sliding bosses fixed at uniform circumferential intervals.

[0026] The mounting assembly is disposed on the inner wall of the housing; the fixing assembly is fixedly installed inside the housing for sealing the housing.

[0027] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. The above-mentioned shell can be used to assemble various components, and the cavities on both sides of the corresponding floating tube sheet inside the sealed and separated shell are used to avoid media exchange. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model;

[0029] Figure 2 for Figure 1 A schematic diagram of direction A in the middle;

[0030] Figure 3 This is a structural schematic diagram of the support plate, sliding boss, and floating tube plate in this utility model.

[0031] The attached diagram lists the components represented by each number as follows:

[0032] 1. Floating tube sheet; 2. Support ring plate; 3. Sliding boss; 4. Pressing ring plate; 5. Reinforcing section; 6. Bolt; 7. Retaining ring; 8. Packing layer; 9. Support plate; 10. Shell; 11. Through hole. Detailed Implementation

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0034] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0035] 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 or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] Example 1

[0038] like Figures 1 to 3As shown, this embodiment provides a novel floating tube sheet sealing structure, including a floating tube sheet 1, a support ring plate 2, a fixing component, and multiple sliding bosses 3. The multiple sliding bosses 3 are fixedly arranged at uniform intervals around the circumference. The fixing component is fixedly arranged and located on one side of one end of the multiple sliding bosses 3. The floating tube sheet 1 is located inside the multiple sliding bosses 3 and is slidably connected to the multiple sliding bosses 3 respectively through sliding members. The floating tube sheet 1 is fixedly connected to the fixing component through the support ring plate 2.

[0039] During use, the floating tube sheet 1 is equipped with heat exchange tubes. The thermal expansion difference of the heat exchange tubes causes the floating tube sheet to undergo slight displacement. During this process, the floating tube sheet 1 is slidably connected to the sliding boss 3 by the sliding component, and the floating tube sheet 1 is connected to the fixed component through the support ring plate 2 to ensure that the floating tube sheet 1 slides stably and will not be jammed.

[0040] Based on the above scheme, the aforementioned fixing component is fixedly installed outside one end of the plurality of sliding bosses 3.

[0041] This embodiment has a simple structure and reasonable design, and is suitable for all heat exchangers with floating tube sheets, especially large heat exchangers with floating tube sheets. It has a better sealing effect, improves the reliability of the equipment, reduces the risk of forced shutdown of the unit, improves production efficiency, and effectively solves the problems of serious leakage at the floating tube sheet end of large heat exchangers with large temperature differences and heat exchange tube breakage caused by "jamming" of the floating tube sheet during sliding.

[0042] Example 2

[0043] Based on Embodiment 1, in this embodiment, the floating tube plate 1 has a circular plate structure, and the fixing component includes a cylindrical clamping ring plate 4 that is closed at one end and open or closed at the other end. The clamping ring plate 4 is fixedly set and located on one side of one end of the plurality of sliding bosses 3, and its other end is fixedly connected to the floating tube plate 1 through the supporting ring plate 2.

[0044] The scheme has a simple structure and reasonable design. The cooperation between the clamping ring plate 4 and the supporting ring plate 2 can ensure the stable assembly of the floating tube plate 1.

[0045] Example 3

[0046] Based on Embodiment 2, this embodiment also includes an annular reinforcing section 5, which is fixedly disposed and located on one side of one end of the plurality of sliding bosses 3, and the clamping ring plate 4 is fixedly installed inside the reinforcing section 5.

[0047] The scheme has a simple structure and a reasonable design. The addition of reinforcement section 5 can enhance the strength of the entire sealing structure.

[0048] Example 4

[0049] Based on Embodiment 3, in this embodiment, the support ring plate 2 is provided with an annular retaining ring 7 on the side near the reinforcing section 5, and the retaining ring 7 is close to the reinforcing section 5; the retaining ring 7, the support ring plate 2, the pressing ring plate 4, and the reinforcing section 5 form a filling area, and the filling area is filled with a filler layer 8.

[0050] The scheme has a simple structure and a reasonable design. The design of the packing layer 8 can increase the sealing effect on the one hand, and on the other hand, it can play a certain buffering role in the movement of the floating tube sheet 1.

[0051] Preferably, in this embodiment, the filler layer 8 is preferably made of carbon fiber or rubber.

[0052] One end of the packing layer 8 contacts the support ring plate 2, and the other end contacts the compression ring plate 4. The side is tightly fitted with the reinforcing section 5 to form a seal. The length of the reinforcing section 5 must meet the "sealing" length of the packing layer 8. The reinforcing section 5 ensures the roundness of the cylinder and reduces the deformation of the cylinder under load, while making the sealing cross section consistent and not too large.

[0053] In addition, the contact surface between the sliding boss 3 and the support plate 9 must be smooth and level.

[0054] Example 5

[0055] Based on any one of Embodiments 3 to 4, in this embodiment, the other end of the clamping ring plate 4 is open, the supporting ring plate 2 has a cylindrical structure, one end of which is fixedly connected to the floating tube plate 1, and the other end extends into the clamping ring plate 4 and is provided with a protrusion, the protrusion being fixedly connected to the clamping ring plate 4 by bolts 6.

[0056] The clamping ring plate 4 and the supporting ring plate 2 are reasonably shaped, making assembly convenient and saving time and effort.

[0057] Alternatively, the aforementioned clamping ring plate 4 can also be a flat plate, which is set perpendicular to the reinforcing section 5.

[0058] Example 6

[0059] Based on Embodiment 5, in this embodiment, one end of the support ring plate 2 is open and the other end is closed, and the other end of the support ring plate 2 and one end of the clamping ring plate 4 are provided with through holes 11 for the medium to pass through. This scheme has a simple structure and reasonable design. The setting of the through holes 11 ensures that the heat exchange medium can smoothly enter the heat exchange tubes fixedly installed on the floating tube sheet 1.

[0060] Example 7

[0061] Based on any one of Embodiments 3 to 6, in this embodiment, the sliding member includes a plurality of support plates 9, which are fixedly installed on the floating tube plate 1 at uniform intervals along the circumference of the floating tube plate 1, and are respectively slidably connected to the plurality of sliding bosses 3.

[0062] The number of support plates 9 is set reasonably to further ensure the stable sliding of the floating tube plate 1 and avoid jamming.

[0063] Preferably, in this embodiment, there are two support plates 9.

[0064] Example 8

[0065] Based on Embodiment 7, in this embodiment, the plurality of support plates 9 are respectively in the form of rod-shaped structures.

[0066] The support plate 9 has a reasonable shape design, which facilitates both connection to the floating tube plate 1 and sliding engagement with the sliding boss 3.

[0067] Alternatively, each of the aforementioned support plates 9 can also be a block structure.

[0068] Based on the above scheme, multiple support plates 9 extend along the floating tube plate 1, with one end fixedly connected to the floating tube plate 1 and the other end extending to the edge of the floating tube plate 1 and slidably connected to multiple sliding bosses 3.

[0069] In addition, the multiple sliding bosses 3 are respectively in the form of a grooving structure extending along the axial direction of the floating tube sheet 1, and the other ends of the multiple support plates 9 extend into the multiple sliding bosses 3 and are slidably connected.

[0070] Alternatively, the multiple sliding bosses 3 can each adopt a slide rail structure.

[0071] Example 9

[0072] Based on the above embodiments, in this embodiment, a heat exchanger includes the novel floating tube sheet sealing structure described above.

[0073] This embodiment also provides a heat exchanger with a simple structure and reasonable design. It is suitable for use in large heat exchangers with floating tube sheets, has a better sealing effect, improves the reliability of the equipment, reduces the risk of forced shutdown of the unit, improves production efficiency, and effectively solves the problems of serious leakage at the floating tube sheet end of large heat exchangers with large temperature differences and heat exchange tube breakage caused by "jamming" of the floating tube sheet during sliding.

[0074] Example 10

[0075] Based on Embodiment 9, this embodiment also includes a cylindrical housing 10, with a plurality of sliding bosses 3 fixedly arranged circumferentially at uniform intervals on the inner wall of the housing 10; the fixing assembly is fixedly installed inside the housing 10 to seal the housing 10.

[0076] The scheme has a simple structure and reasonable design. The aforementioned shell can be used to assemble various components and to seal and separate the cavities on both sides of the floating tube sheet 1 within the shell 10, thus preventing media exchange.

[0077] Preferably, in this embodiment, the housing 10 is preferably cylindrical, and the floating tube plate 1 is installed inside the housing 10, with its edge close to the inner wall of the housing 10 and leaving a certain gap.

[0078] In addition, heat exchange tubes are fixedly installed on the floating tube sheet 1.

[0079] The working principle of this utility model is as follows:

[0080] During use, the floating tube plate 1 will move slightly under the pressure difference on both sides. During this process, the floating tube plate 1 is slidably connected to the sliding boss 3 by multiple support plates 9, and the floating tube plate 1 is connected to the pressing ring plate 4 through the support ring plate 2, so as to ensure that the floating tube plate 1 slides stably and will not be blocked.

[0081] In this invention, the space inside the shell 10 is divided into two independent cavities by a floating tube plate 1, a support ring plate 2, and a pressing ring plate 4. A heat exchange tube is fixedly installed on the floating tube plate 1, with one end of the heat exchange tube extending into the support ring plate 2. The heat exchange medium enters the heat exchange tube through the through hole 11 for heat exchange.

[0082] The sealing structure provided by this utility model is suitable for use in large heat exchangers with floating tube sheets. It provides better sealing, improves equipment reliability, reduces the risk of forced shutdown, and increases production efficiency.

[0083] Compared with existing floating tube sheet seals, this invention features a reinforced section in the shell at the sealing packing, thereby reducing the deformation of the cylinder and preventing the packing cross-sectional size from becoming excessive, resulting in a better sealing effect. The floating tube sheet has welded protrusions at the sliding point, allowing it to slide horizontally along the equipment's centerline, significantly reducing the risk of heat exchange tube breakage due to "jamming" during sliding. The sliding guide support not only ensures the free expansion and contraction of the floating tube sheet but also forces it to slide horizontally along the equipment's centerline, reducing the likelihood of heat exchange tube breakage due to "jamming" during sliding.

[0084] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0085] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0086] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A new floating tube sheet sealing structure, characterized in that: The invention comprises a floating tube sheet (1), a supporting ring plate (2), a fixing assembly and a plurality of sliding bosses (3); the plurality of sliding bosses (3) are fixedly arranged at circumferentially uniform intervals; the fixing assembly is fixedly arranged and located on one side of one end of the plurality of sliding bosses (3); the floating tube sheet (1) is located on the inner side of the plurality of sliding bosses (3) and is slidably connected to the plurality of sliding bosses (3) respectively through sliding members; and the floating tube sheet (1) is fixedly connected to the fixing assembly through the supporting ring plate (2).

2. The novel floating tube sheet sealing structure according to claim 1 is characterized in that: The floating tube sheet (1) is a circular plate-shaped structure, and the fixing assembly comprises a cylindrical clamping ring plate (4) with one end closed and the other end open or closed, the clamping ring plate (4) being fixedly arranged and located on one side of one end of the plurality of sliding bosses (3), and the other end of the clamping ring plate (4) being fixedly connected to the floating tube sheet (1) via the supporting ring plate (2).

3. The novel floating tube sheet sealing structure according to claim 2 is characterized in that: The fixing assembly further comprises an annular reinforcement section (5), wherein the reinforcement section (5) is fixedly arranged and located on one side of one end of the plurality of sliding bosses (3), and the clamping ring plate (4) is fixedly installed in the reinforcement section (5).

4. The novel floating tube sheet sealing structure according to claim 3 is characterized in that: An annular retaining ring (7) is provided on one side of the support ring plate (2) close to the reinforcement section (5), and the retaining ring (7) is close to the reinforcement section (5); a filling area is enclosed between the retaining ring (7), the support ring plate (2), the clamping ring plate (4), and the reinforcement section (5), and the filling area is filled with a filler layer (8).

5. The novel floating tube sheet sealing structure according to claim 3 is characterized in that: The other end of the clamping ring plate (4) is open, and the supporting ring plate (2) is a cylindrical structure, one end of which is fixedly connected to the floating tube plate (1), and the other end extends into the clamping ring plate (4) and is provided with a protrusion, and the protrusion is fixedly connected to the clamping ring plate (4) by a bolt (6).

6. The novel floating tube sheet sealing structure according to claim 5 is characterized in that: One end of the support ring plate (2) is open and the other end is closed, and the other end of the support ring plate (2) and one end of the clamping ring plate (4) are oppositely provided with through holes (11) for medium to pass through.

7. The novel floating tube sheet sealing structure according to any one of claims 3 to 6, characterized in that: The sliding member comprises a plurality of supporting plates (9), wherein the plurality of supporting plates (9) are fixedly mounted on the floating tube sheet (1) at uniform intervals along the circumference of the floating tube sheet (1), and are respectively slidably connected to the plurality of sliding bosses (3) corresponding thereto.

8. The novel floating tube sheet sealing structure according to claim 7 is characterized in that: The plurality of support plates (9) are respectively in the form of rod-shaped structures.

9. A heat exchanger, characterized in that: The invention comprises a novel floating tube sheet sealing structure as claimed in any one of claims 1 to 8.

10. The heat exchanger according to claim 9, characterized in that: It also comprises a cylindrical shell (10), wherein a plurality of sliding bosses (3) are fixedly arranged on the inner wall of the shell (10) at even circumferential intervals; and the fixing assembly is fixedly installed in the shell (10) for sealing the shell (10).

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