Floating head heat exchanger with double seal function

Abstract

The utility model relates to heat exchanger technical field especially has double sealing function's floating head type heat exchanger, including the casing, both ends of casing are equipped with tube box and floating head tank, the top of tube box is equipped with hot liquid inlet and penetrates, the bottom of tube box is equipped with hot liquid outlet and penetrates about the relative position of hot liquid inlet, the top of casing is close to floating head side and is equipped with cold liquid inlet and penetrates, the bottom of casing is close to tube box side and is equipped with cold liquid outlet and penetrates, the inside middle axis of tube box is equipped with the baffle, the side lap of baffle has fixed tube plate mechanism, the middle axis ring of fixed tube plate mechanism distribution has a plurality of heat exchange pipes, the inside sleeve of heat exchange pipe in casing is equipped with a plurality of baffles, the sleeve of heat exchange pipe is close to floating head tank side and is equipped with floating head tube plate mechanism. The device can be used for the heat exchange operation of hot medium, can effectively double seal to the tube side and shell side of heat exchanger, reduces the risk of medium leakage.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, specifically to a floating head heat exchanger with dual sealing function. Background Technology

[0002] Floating head heat exchangers are a type of shell-and-tube heat exchanger, suitable for conditions where there is a large temperature difference between the shell and the tube bundle or where the shell-side medium is prone to fouling. The floating head is not connected to the shell, allowing for free thermal expansion of the shell and tube bundle. The tube bundle can be extracted, preventing large temperature difference and thermal stress, thus avoiding damage to the heat exchanger structure.

[0003] In the process of realizing this utility model, the inventors discovered the following problems with the existing technology: the flanges and gaskets at the floating head and tube box of the floating head heat exchanger are prone to leakage due to thermal expansion. Utility Model Content

[0004] The purpose of this invention is to provide a floating head heat exchanger with dual sealing function to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a floating head heat exchanger with dual sealing function, comprising a shell, tube boxes and floating head boxes at both ends of the shell, a hot liquid inlet penetrating through the top of the tube box, a hot liquid outlet penetrating through the bottom of the tube box relative to the hot liquid inlet, a cold liquid inlet penetrating through the top of the shell near the floating head box, a cold liquid outlet penetrating through the bottom of the shell near the tube box, a partition plate provided at the central axis inside the tube box, a fixed tube sheet mechanism overlapping one side of the partition plate, a plurality of heat exchange tubes arranged in a ring along the central axis of the fixed tube sheet mechanism, a plurality of baffles sleeved inside the shell, and a floating head tube sheet mechanism sleeved on the side of the heat exchange tubes near the floating head box;

[0006] The floating head tube sheet mechanism includes a floating head tube sheet body, a first hook ring is sleeved on the outside of the floating head tube sheet body, a second hook ring is sleeved on the outside of the floating head tube sheet body, a flange B is provided on the periphery of both the first hook ring and the second hook ring, and multiple ring grooves are opened on the opposite sides of the first hook ring and the second hook ring, and a floating head cover is provided on one side of the floating head tube sheet body, and the first hook ring, the second hook ring and the floating head cover are connected by bolts.

[0007] The beneficial effects of this utility model are as follows: the combination of the floating head tube sheet body, the first hook ring, the second hook ring, the flange, the annular groove and the floating head cover can achieve effective sealing installation of the floating head tube sheet; the combination of the fixed plate, the sealing ring and the flange can achieve effective sealing installation of the fixed tube sheet, thereby achieving dual sealing of the tube side and the shell side.

[0008] To achieve a seal between the floating head tube sheet and other parts while allowing for expansion space:

[0009] The configuration is further defined as follows: the multi-layered annular grooves of the first hook ring and the second hook ring are arranged about the central axis, and the inner wall of the annular groove is sleeved with the outer wall of the first hook ring and the second hook ring. The inner wall of the outer annular groove is coated with sealant, and the inner annular groove is an expansion joint.

[0010] By adopting the above technical solution, the floating head tube sheet can have a certain expansion space and can maintain a seal.

[0011] To achieve a sealed installation of the fixed tube sheet:

[0012] The method is further configured such that: the fixed tube sheet mechanism includes a fixed plate, and the fixed plate has sealing rings on both sides outside the housing, and a flange A is sleeved on the outside of the sealing ring.

[0013] By adopting the above technical solution, the sealed installation of the fixed tube sheet can be achieved.

[0014] To achieve the heat exchange function:

[0015] The baffles are further configured such that they are staggered about the central axis of the heat exchange tube, and the size of the baffles is consistent with the tube diameter of the shell and is semi-circular.

[0016] By adopting the above technical solution, the hot medium in the heat exchange tube exchanges heat with the cold medium in the shell, and under the action of the baffle, the heat exchange time is extended and the heat exchange efficiency is improved.

[0017] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main body of the present utility model;

[0019] Figure 2 This is a full sectional view of the main body of this utility model;

[0020] Figure 3 This is a schematic diagram of the floating head tube sheet mechanism of this utility model;

[0021] Figure 4 This is a cross-sectional schematic diagram of the floating head tube sheet mechanism of this utility model;

[0022] Figure 5 This is a cross-sectional schematic diagram of the fixed tube sheet mechanism of this utility model.

[0023] In the diagram: 1. Shell; 2. Tube box; 3. Floating head box; 4. Hydrothermal inlet; 5. Hydrothermal outlet; 6. Cold liquid inlet; 7. Cold liquid outlet; 8. Baffle; 9. Fixed tube sheet mechanism; 901. Fixed plate; 902. Sealing ring; 903. Flange A; 10. Heat exchange tube; 11. Baffle plate; 12. Floating head tube sheet mechanism; 1201. Floating head tube sheet body; 1202. First hook ring; 1203. Flange B; 1204. Second hook ring; 1205. Floating head cover. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0025] Please see Figures 1 to 5 A floating head heat exchanger with dual sealing function includes a shell 1. The shell 1 has tube boxes 2 and floating head boxes 3 at both ends. A hot liquid inlet 4 is provided through the top of the tube box 2. A hot liquid outlet 5 is provided through the bottom of the tube box 2 relative to the hot liquid inlet 4. A cold liquid inlet 6 is provided through the top of the shell 1 near the floating head box 3. A cold liquid outlet 7 is provided through the bottom of the shell 1 near the tube box 2. A baffle 8 is provided at the central axis inside the tube box 2. A fixed tube sheet mechanism 9 is attached to one side of the baffle 8. Several heat exchange tubes 10 are distributed in a ring around the central axis of the fixed tube sheet mechanism 9. Several baffles 11 are installed inside the shell 1 for the heat exchange tubes 10. A floating head tube sheet mechanism 12 is installed on the side of the heat exchange tubes 10 near the floating head box 3.

[0026] The floating head tube sheet mechanism 12 includes a floating head tube sheet body 1201. A first hook ring 1202 is sleeved on the outside of the floating head tube sheet body 1201, and a second hook ring 1204 is sleeved on the outside of the floating head tube sheet body 1201. Flanges B1203 are provided around the first hook ring 1202 and the second hook ring 1204. Multi-layer annular grooves are opened on the opposite sides of the first hook ring 1202 and the second hook ring 1204. A floating head cover 1205 is provided on one side of the floating head tube sheet body 1201. The first hook ring 1202, the second hook ring 1204 and the floating head cover 1205 are connected by bolts.

[0027] In this embodiment, as Figure 3 and Figure 4 As shown, the multi-layered annular grooves of the first hook ring 1202 and the second hook ring 1204 are arranged about the central axis, and the inner wall of the annular groove is sleeved with the outer wall of the first hook ring 1202 and the second hook ring 1204. The inner wall of the outer annular groove is coated with sealant, and the inner annular groove is an expansion joint.

[0028] In this embodiment, as Figure 5As shown, the fixed tube sheet mechanism 9 includes a fixed plate 901, and the fixed plate 901 has sealing rings 902 on both sides outside the housing 1. The sealing rings 902 are fitted with flanges A903.

[0029] In this embodiment, as Figure 2 As shown, the baffles 11 are arranged in an alternating pattern about the central axis of the heat exchange tube 10, and the size of the baffles 11 is consistent with the tube diameter of the shell 1 and is semi-circular.

[0030] The floating head heat exchanger with dual sealing function operates as follows:

[0031] First, the cold medium is injected into the shell 1 through the cold liquid inlet 6, and the heat exchange efficiency is ensured by the staggered baffles 11. The medium to be heat exchanged is injected into the tube box 2 through the hot liquid inlet 4, and heat exchange is carried out from the multiple annularly distributed heat exchange tubes 10 of the fixed plate 901, and flows out from the hot liquid outlet 5 below the partition plate 8.

[0032] The annular grooves of the first hook ring 1202 and the second hook ring 1204 are aligned, and sealant (model: Sunray YS-2100) is applied to the inner wall of the outer annular groove. The float cover 1205 is connected to the float tube plate 1201 by several bolts. The flanges of the float box 3, the first hook ring 1202 flange B1203, the second hook ring 1204 flange B1203, and the shell 1 are connected to achieve structural stability. The sealing ring 902 of the fixing plate 901 is fitted with the flange A903, and the flange A903 is fixed by bolts, thereby achieving double sealing of the tube side and the shell side.

[0033] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0034] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of this utility model, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without modification, should all be considered within the protection scope of this utility model.

Claims

1. A floating head heat exchanger with dual sealing function, comprising a shell (1), characterized in that: The shell (1) is provided with a tube box (2) and a floating head box (3) at both ends. A hot liquid inlet (4) is provided through the top of the tube box (2). A hot liquid outlet (5) is provided through the bottom of the tube box (2) relative to the hot liquid inlet (4). A cold liquid inlet (6) is provided through the top of the shell (1) near the floating head box (3). A cold liquid outlet (7) is provided through the bottom of the shell (1) near the tube box (2). A partition (8) is provided at the central axis inside the tube box (2). A fixed tube sheet mechanism (9) is attached to one side of the partition (8). Several heat exchange tubes (10) are distributed in a ring along the central axis of the fixed tube sheet mechanism (9). Several baffles (11) are fitted inside the shell (1). A floating head tube sheet mechanism (12) is fitted on the side of the heat exchange tube (10) near the floating head box (3). The floating head tube plate mechanism (12) includes a floating head tube plate body (1201), a first hook ring (1202) is sleeved on the outside of the floating head tube plate body (1201), a second hook ring (1204) is sleeved on the outside of the floating head tube plate body (1201), a flange B (1203) is provided on the periphery of the first hook ring (1202) and the second hook ring (1204), and multiple ring grooves are opened on the opposite sides of the first hook ring (1202) and the second hook ring (1204). A floating head cover (1205) is provided on one side of the floating head tube plate body (1201), and the first hook ring (1202), the second hook ring (1204) and the floating head cover (1205) are connected by bolts.

2. The floating head heat exchanger with dual sealing function as described in claim 1, characterized in that: The multi-layered annular grooves of the first hook ring (1202) and the second hook ring (1204) are arranged about the central axis, and the inner wall of the annular groove is sleeved with the outer wall of the first hook ring (1202) and the second hook ring (1204). The inner wall of the outer ring groove is coated with sealant, and the inner ring groove is an expansion joint.

3. The floating head heat exchanger with dual sealing function as described in claim 1, characterized in that: The fixed tube sheet mechanism (9) includes a fixed plate (901), and the fixed plate (901) has sealing rings (902) on both sides outside the housing (1), and a flange A (903) is sleeved on the outside of the sealing rings (902).

4. The floating head heat exchanger with dual sealing function as described in claim 1, characterized in that: The baffles (11) are arranged in an alternating pattern about the central axis of the heat exchange tube (10), and the size of the baffles (11) is consistent with the tube diameter of the shell (1) and is semi-circular.

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