High-pressure-resistant silicon carbide heat exchanger

Abstract

The utility model relates to the technical field of heat exchangers, and discloses a high-pressure-resistant silicon carbide heat exchanger which comprises a heat exchanger body, a first tube plate and a second tube plate are arranged at the two ends in the heat exchanger body respectively, and a plurality of positioning rods are jointly connected between the first tube plate and the second tube plate. A plurality of baffle plates are jointly connected to the positioning rods at intervals in a sleeving mode, the baffle plates and the positioning rods are connected through positioning blocks, sealing pieces are arranged on the side faces of the baffle plates in a surrounding mode, and the sealing pieces and the inner wall of a tube shell of the heat exchanger body can be sealed. The device solves the problems of leakage between the baffle plate and the tube shell and inconvenience in maintenance of welding and positioning of the baffle plate, realizes movable installation of the baffle plate through matching of the positioning rod and the positioning block, is convenient to disassemble, assemble and replace, and prevents fluid leakage on the baffle plate by arranging the sealing piece on the outer edge of the baffle plate.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, and more specifically, to a high-pressure resistant silicon carbide heat exchanger. Background Technology

[0002] Silicon carbide heat exchangers are a new type of heat exchanger that uses silicon carbide ceramic material as the heat transfer medium. They possess excellent properties such as corrosion resistance, high temperature resistance, high thermal conductivity, high hardness, and wear resistance. They are typically of a shell-and-tube structure, consisting of a shell, tube sheet, heat exchange tubes, and several baffles.

[0003] Chinese invention patent application number 202411091877.6 discloses a metal sealing sleeve and a shell-and-tube heat exchanger. A corrugated sleeve is provided between the baffle and the heat exchange tube to prevent leakage between the baffle and the heat exchange tube under high pressure impact. However, it cannot solve the problem of leakage between the baffle and the shell. In order to prevent the baffle from shifting, the baffle is usually fixed to the heat exchange tube by welding, which makes it inconvenient to replace the baffle or the heat exchange tube. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a high-pressure silicon carbide heat exchanger that is easy to replace parts and can prevent leakage between the baffle and the shell.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A high-pressure resistant silicon carbide heat exchanger includes a heat exchanger body. Tube sheet one and tube sheet two are respectively provided at both ends inside the heat exchanger body. A plurality of positioning rods are connected between tube sheet one and tube sheet two. A plurality of baffles are sleeved on the plurality of positioning rods at intervals. The baffles are connected to the positioning rods by positioning blocks. A sealing element is provided on the side of the baffle, and the sealing element can seal with the inner wall of the tube shell of the heat exchanger body.

[0007] The present invention is further configured such that: a plurality of positioning grooves are spaced apart on the positioning rod, the positioning grooves are annular grooves, the positioning blocks are semi-cylindrical, two positioning blocks are assembled together to form a complete cylinder, the positioning blocks are engaged with the positioning grooves, and the baffles are sleeved on the corresponding two positioning blocks.

[0008] The present invention is further configured such that: the positioning block includes an abutment plate, the abutment plate is semi-circular, the inner ring side of the abutment plate is engaged with the positioning groove, the end face of the abutment plate extending out of the positioning groove abuts against the plate surface of the baffle plate, a bushing is connected to the abutment plate, the bushing is semi-circular, the inner ring surface of the bushing is in contact with the wall of the positioning rod, and the outer ring surface of the bushing is in contact with the inner wall of the hole of the baffle plate.

[0009] The present invention is further configured such that the abutment plate is disposed on the side of the baffle plate away from the liquid impact.

[0010] The present invention is further configured such that: the sealing element is disposed on the side of the baffle plate facing the liquid impact, the cross-section of the sealing element is arc-shaped, the circular side of the arc-shaped element faces the side of the baffle plate that is impacted by the liquid, one side of the sealing element is connected to the plate surface of the baffle plate, and the other side of the sealing element can be in contact with the inner wall of the heat exchanger body shell.

[0011] The present invention is further configured such that: the sealing element includes a first metal sheet and a second metal sheet, the first metal sheet is disposed on the side facing the baffle plate, the second metal sheet is in contact with the first metal sheet, and the coefficient of thermal expansion of the first metal sheet is less than the coefficient of thermal expansion of the second metal sheet.

[0012] The advantages of this utility model are:

[0013] 1. A positioning rod is added, and a positioning groove is opened at an appropriate position on the positioning rod. Two positioning blocks are snapped into the positioning groove. The baffle plate is sleeved on the cylinder composed of the two positioning blocks, thereby pressing and fixing the two positioning blocks together to form a complete cylinder, preventing liquid leakage from this point. The plate surface of the baffle plate away from the fluid impact side abuts against the abutment plate of the positioning block. That is, the abutment plate can provide support for the baffle plate when it is impacted by the fluid, preventing the baffle plate from moving. This replaces the traditional welding connection method and facilitates subsequent disassembly and replacement of parts.

[0014] 2. A sealing element is provided on the side of the baffle plate facing the fluid impact. The sealing element consists of two layers of metal sheet 1 and metal sheet 2 that are in contact with each other. The cross-section of the sealing element is arc-shaped and bends towards the fluid side. The thermal expansion coefficient of the outer metal sheet 2 is greater than that of the inner metal sheet 1. During operation, the sealing element expands due to heat. The expansion amount of metal sheet 2 is greater than that of metal sheet 1, causing the sealing element as a whole to shift towards the tube shell of the heat exchanger body, thereby pressing the tube shell tightly and preventing fluid leakage between the baffle plate and the tube shell. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of one embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the baffle assembly structure of this utility model;

[0017] Figure 3 for Figure 2 The enlarged view of part A shown;

[0018] Figure 4 For along Figure 2 The BB line cross-section shown;

[0019] Figure 5 for Figure 4 Enlarged view of section C shown;

[0020] In the diagram: 1. Heat exchanger body; 2. Tube sheet one; 3. Tube sheet two; 4. Baffle plate; 5. Positioning rod; 51. Positioning groove; 6. Positioning block; 61. Abutment plate; 62. Bushing; 7. Seal; 71. Metal sheet one; 72. Metal sheet two. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0024] Please see Figure 1-5 The present invention provides the following technical solution:

[0025] A high-pressure resistant silicon carbide heat exchanger includes a heat exchanger body 1. Tube sheet 2 and tube sheet 3 are respectively installed at both ends inside the heat exchanger body 1. Tube sheet 2 and tube sheet 3 are used to install heat exchange tubes. A plurality of positioning rods 5 are connected between tube sheet 2 and tube sheet 3. A plurality of baffles 4 are spaced and sleeved on the positioning rods 5. The baffles 4 are connected to the positioning rods 5 by positioning blocks 6. The positioning blocks 6 prevent the baffles 4 from shifting under the impact of high-pressure fluid. A sealing element 7 is provided on the side of the baffles 4. The sealing element 7 can seal against the inner wall of the tube shell of the heat exchanger body 1, thereby preventing fluid leakage between the baffles and the inner wall of the tube shell, avoiding damage to the baffles 4, and ensuring heat exchange efficiency.

[0026] The positioning rod 5 is provided with several positioning grooves 51 spaced apart. The positioning grooves 51 are annular grooves. The positioning block 6 is semi-cylindrical. Two positioning blocks 6 are assembled together to form a complete cylinder. The positioning block 6 is engaged with the positioning groove 51. The baffle plate 4 is sleeved on the corresponding two positioning blocks 6, thereby ensuring that the two positioning blocks 6 maintain the state of mutual assembly. This ensures the integrity of the annular connection surface between the positioning block 6, the positioning rod 5, and the baffle plate 4, and prevents fluid leakage from between the baffle plate 4 and the positioning rod 5.

[0027] The positioning block 6 includes an abutment plate 61, which is semi-circular in shape. The inner ring side of the abutment plate 61 is engaged with the positioning groove 51. The end face of the abutment plate 61 extending out of the positioning groove 51 abuts against the plate surface of the baffle plate 4. The abutment plate 61 is located on the side of the baffle plate 4 away from the liquid impact. A bushing 62 is connected to the abutment plate 61. The bushing 62 is semi-circular in shape. The inner ring surface of the bushing 62 is in contact with the rod wall of the positioning rod 5, and the outer ring surface of the bushing 62 is in contact with the inner wall of the hole in the baffle plate 4.

[0028] Two bushings 62 are squeezed between the positioning rod 5 and the hole of the baffle 4 to prevent fluid from leaking from the hole of the baffle 4.

[0029] When the baffle plate 4 is subjected to fluid impact, the abutment plate 61 and the positioning groove 51 cooperate to provide support for the baffle plate 4, which can prevent the baffle plate 4 from shifting under high pressure impact; and when disassembling, it is only necessary to move the baffle plate 4 away from the abutment plate 61 and out of the positioning block 6 to separate the baffle plate 4 from the positioning rod 5, changing the welded connection to a movable connection, which is convenient for disassembly and maintenance.

[0030] The seal 7 is located on the side of the baffle plate 4 facing the liquid impact. The cross-section of the seal 7 is arc-shaped, with the circular side of the arc facing the side of the baffle plate 4 that is impacted by the liquid. One side of the seal 7 is connected to the plate surface of the baffle plate 4, and the other side of the seal 7 can be in contact with the inner wall of the heat exchanger body 1 tube shell.

[0031] The sealing element 7 includes a first metal sheet 71 and a second metal sheet 72. The first metal sheet 71 is disposed on the side facing the baffle plate 4, and the second metal sheet 72 is in contact with the first metal sheet 71. The coefficient of thermal expansion of the first metal sheet 71 is less than that of the second metal sheet 72. During operation, the sealing element 7 expands due to heat. The expansion of the outer second metal sheet 72 is greater than that of the inner first metal sheet 71, which causes the first metal sheet 71 to pull the second metal sheet 72 toward the baffle plate 4. The second metal sheet 72 is pressed tightly toward the baffle plate 4 and the inner wall of the tube shell, which prevents fluid from leaking from the gap between the baffle plate 4 and the tube shell and ensures heat exchange efficiency.

[0032] Specifically, a positioning rod 5 is added, and a positioning groove 51 is opened at an appropriate position on the positioning rod 5. Two positioning blocks 6 are snapped into the positioning groove 51. The baffle plate 4 is sleeved on the cylinder composed of the two positioning blocks 6, thereby pressing and fixing the two positioning blocks 6 against each other to form a complete cylinder, preventing liquid from leaking from here. The plate surface of the baffle plate 4 away from the fluid impact side abuts against the abutting plate 61 of the positioning block 6. That is, the abutting plate 61 can provide support for the baffle plate 4 when it is impacted by the fluid, preventing the baffle plate 4 from moving. This replaces the traditional welding connection method and facilitates subsequent disassembly and replacement of parts.

[0033] A sealing element 7 is provided on the side of the baffle plate 4 facing the fluid impact. The sealing element 7 is composed of two layers of metal sheet 71 and metal sheet 72 that are in contact with each other. The cross-section of the sealing element 7 is arc-shaped and bends towards the fluid side. The coefficient of thermal expansion of the outer metal sheet 72 is greater than that of the inner metal sheet 71. When working, the sealing element 7 expands due to heat. The expansion amount of the metal sheet 72 is greater than that of the metal sheet 71, which causes the sealing element 7 to shift towards the tube shell of the heat exchanger body 1, thereby pressing the tube shell and preventing fluid leakage between the baffle plate 4 and the tube shell.

[0034] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0035] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0036] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar counterparts and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0037] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-pressure resistant silicon carbide heat exchanger, comprising a heat exchanger body (1), characterized in that: The heat exchanger body (1) has tube sheet 1 (2) and tube sheet 2 (3) respectively at both ends. Tube sheet 1 (2) and tube sheet 2 (3) are connected by a number of positioning rods (5). A number of baffles (4) are sleeved on the positioning rods (5) at intervals. The baffles (4) and the positioning rods (5) are connected by positioning blocks (6). The sides of the baffles (4) are surrounded by sealing elements (7). The sealing elements (7) can seal with the inner wall of the tube shell of the heat exchanger body (1).

2. The high-pressure silicon carbide heat exchanger according to claim 1, characterized in that: The positioning rod (5) is provided with a plurality of positioning grooves (51) spaced apart. The positioning grooves (51) are annular grooves. The positioning block (6) is semi-cylindrical. Two positioning blocks (6) are assembled together to form a complete cylinder. The positioning block (6) is engaged with the positioning groove (51). The baffle plate (4) is sleeved on the corresponding two positioning blocks (6).

3. A high-pressure resistant silicon carbide heat exchanger according to claim 2, characterized in that: The positioning block (6) includes an abutment plate (61), which is semi-circular. The inner ring side of the abutment plate (61) is engaged with the positioning groove (51). The end face of the abutment plate (61) extending out of the positioning groove (51) abuts against the plate surface of the baffle plate (4). A bushing (62) is connected to the abutment plate (61). The bushing (62) is semi-circular. The inner ring surface of the bushing (62) is in contact with the rod wall of the positioning rod (5), and the outer ring surface of the bushing (62) is in contact with the inner wall of the hole of the baffle plate (4).

4. A high-pressure resistant silicon carbide heat exchanger according to claim 3, characterized in that: The abutment plate (61) is located on the side of the baffle plate (4) away from the liquid impact.

5. A high-pressure resistant silicon carbide heat exchanger according to claim 1, characterized in that: The sealing element (7) is disposed on the side of the baffle plate (4) facing the liquid impact. The cross-section of the sealing element (7) is arc-shaped, and the circular side of the arc faces the side of the baffle plate (4) that is impacted by the liquid. One side of the sealing element (7) is connected to the plate surface of the baffle plate (4), and the other side of the sealing element (7) can be in contact with the inner wall of the heat exchanger body (1) shell.

6. A high-pressure resistant silicon carbide heat exchanger according to claim 5, characterized in that: The sealing element (7) includes a metal sheet one (71) and a metal sheet two (72). The metal sheet one (71) is disposed on the side facing the baffle plate (4). The metal sheet two (72) is attached to the metal sheet one (71). The coefficient of thermal expansion of the metal sheet one (71) is smaller than that of the metal sheet two (72).

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