A heat exchange tube structure for preventing short circuit of fluid in a shell-and-tube heat exchanger

Abstract

The utility model belongs to heat exchanger structure design technical field relates to a column pipe type heat exchanger fluid shunt and prevent short circuit heat exchange pipe structure. Including casing (1), heat exchange core body (2), import seal cover (3), hot fluid export (4), hot fluid import (5), plug (6), export seal cover (7), shunt plate (8), clamping spring (9). Can reduce fluid concentration, short circuit and heat exchange dead zone greatly, avoid the weight surplus sinking caused by fluid short circuit. At the same time, the baffle (11) and the flow blocking heat exchange pipe (14) are connected by welding, which plays a supporting role. On the other hand, the hole position of the shunt plate enhances the disturbance to the medium, reduces the impact on the end surface of the heat exchange core body (2), effectively improves the service life of the heat exchanger, and in the large pipe diameter heat exchanger, the cold side fluid can be avoided to concentrate in the center position of the heat exchanger, causing the phenomenon of uneven heat exchange.

Description

Technical Field

[0001] This utility model belongs to the technical field of heat exchanger structure design, and relates to a fluid diversion and short-circuit protection heat exchange tube structure for a shell-and-tube heat exchanger. Background Technology

[0002] Shell-and-tube heat exchangers are a primary heat dissipation device for shipboard equipment. They are simple in structure, robust and durable, highly flexible in operation, reliable, and capable of withstanding high pressure and temperature. To date, they remain the main heat exchangers used in high-temperature and high-pressure environments. However, the relatively low heat dissipation performance of shell-and-tube heat exchangers is a significant factor limiting their application. This is mainly due to the limited methods for enhancing heat transfer within the heat dissipation unit and structural design limitations. The most significant limitation is the uneven fluid flow and cross-flow of the shell-side fluid. Traditional heat exchanger structures restrict the uniformity of medium flow and heat transfer within the heat exchange core, causing a significant deviation between the actual heat dissipation effect and theoretical expectations. Currently, there is a lack of systematic research on the heat exchange performance and flow characteristics of this type of radiator in this field. Utility Model Content

[0003] Utility Model Purpose In view of the above situation, in order to solve the problems of fluid diversion and short-circuit prevention in heat exchangers, the purpose of this utility model is to provide a heat exchange tube structure for fluid diversion and short-circuit prevention in a shell-and-tube heat exchanger. This simplifies the product structure while significantly reducing fluid concentration, short circuits, and heat exchange dead zones, avoiding weight accumulation caused by fluid short circuits, and improving the relatively low heat dissipation efficiency of traditional heat exchangers. This meets the future high-efficiency development needs of shipborne equipment heat dissipation and has good application prospects.

[0004] Technical solution A tubular heat exchanger fluid diversion and short-circuit protection heat exchange tube structure includes a shell (1), a heat exchange core (2), an inlet cap (3), a hot fluid outlet (4), a hot fluid inlet (5), a plug (6), an outlet cap (7), a diverter plate (8), and a retaining ring (9). The shell (1) is welded to the heat exchange core (2), and a hot fluid outlet (4) and a hot fluid inlet (5) are provided on the shell (1). The inlet cap (3) is assembled to the cold fluid inlet side of the heat exchange core (2) through a connector. The outlet cap (7) is assembled to the cold fluid outlet side of the heat exchange core (2) through a connector. The diverter plate (8) is assembled to the inlet cap (3) through a retaining ring (9). The heat exchange core (2) includes a cylindrical flange A ( 10) Baffle plate (11), circular heat dissipation pipe (12), cylindrical flange B (13), and baffle heat exchange pipe (14); the baffle heat exchange pipe (14) passes through the baffle plate (11) and is welded together, and cylindrical flange A (10) and cylindrical flange B (13) are welded to both sides of the baffle heat exchange pipe (14), the circular heat dissipation pipe (12) passes through the baffle plate (11), and cylindrical flange A (10) and cylindrical flange B (13) are welded to both sides of the baffle plate (11).

[0005] Furthermore, both the inlet cap (3) and the outlet cap (7) are equipped with plugs (6).

[0006] Furthermore, the holes of the diverter plate (8) should be staggered with the holes of the circular heat sink (12) to enhance the disturbance of the cold fluid, reduce the impact on the end face of the heat exchange core (2), and effectively improve the service life of the heat exchanger.

[0007] Furthermore, there are several baffle heat exchange tubes (14) arranged radially, specifically square tubes, to prevent short circuit of fluid between tubes and to support the baffle plate (11).

[0008] Furthermore, there are several baffles (11), and each baffle (11) is specifically an arc-shaped structure.

[0009] Furthermore, when there are multiple baffles (11), the cut directions of adjacent baffles (11) are opposite. This extends the effective flow path of the shell-side fluid, increases the contact time, and improves the heat exchange efficiency of the heat exchanger.

[0010] The beneficial effects of this application are as follows: The above-mentioned utility model, on the one hand, simplifies the product structure while significantly reducing fluid concentration, short circuits, and heat exchange dead zones, avoiding weight accumulation caused by fluid short circuits. At the same time, the baffle plate (11) and the flow-blocking heat exchange tube (14) are connected by welding, which plays a supporting role. On the other hand, the hole setting of the flow divider plate enhances the disturbance to the medium and reduces the impact on the end face of the heat exchange core (2), effectively improving the service life of the heat exchanger. In large-diameter heat exchangers, it can avoid the cold-side fluid from concentrating in the center of the heat exchanger, causing uneven heat exchange.

[0011] Heat exchangers, as a primary device for heat dissipation in shipboard equipment, play an increasingly important role. Research on fluid diversion and short-circuit protection structures for heat exchangers simplifies the product structure while significantly reducing fluid concentration, short circuits, and heat exchange dead zones. This enhances turbulence for both hot and cold fluids, disrupts the laminar boundary layer, and avoids weight accumulation caused by fluid short circuits or concentration. This improves upon the relatively low heat dissipation efficiency of traditional heat exchangers, meeting the future development needs of shipboard equipment for efficient heat dissipation, especially for high-pressure, high-heat-flux-density media, and demonstrates promising application prospects. Attached Figure Description

[0012] Figure 1 This is a cross-sectional view of the heat exchanger structure. Figure 2 This is a three-dimensional half-sectional view of the heat exchanger. Figure 3 This is a schematic diagram of the heat exchanger core structure. Figure 4 This is a front view of the heat exchanger core. Figure 5 This is a left view of the heat exchange core. Figure 6 This is a right view of the heat exchanger core. The components include: shell (1), heat exchange core (2), inlet cover (3), hot fluid outlet (4), hot fluid inlet (5), plug (6), outlet cover (7), flow divider (8), and snap ring (9). Other components include: cylinder flange A (10), baffle plate (11), circular heat dissipation tube (12), cylinder flange B (13), and baffle heat exchange tube (14). Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be described in more detail below with reference to the embodiments of this utility model. In the examples, the same or similar reference numerals denote the same or similar components or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this utility model. The embodiments described below with reference to the embodiments are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. The embodiments of this utility model will be described in detail below with reference to their specific implementation.

[0014] The core utility model point: The structure of the heat exchanger fluid diversion and anti-short circuit heat exchange tube of the tube-type heat exchanger is as follows: the heat exchange core (2) is connected to the inlet cover (3) and the outlet cover (7) by bolts and gaskets. The diversion plate (8) is fixed on the inlet cover (3) by snap ring (9). The heat exchange core (2) includes a cylindrical flange A (10), a baffle plate (11), a circular heat dissipation tube (12), a cylindrical flange B (13), and a baffle heat exchange tube (14). The hot fluid enters the heat exchange core (2) through the hot fluid inlet (5) and flows in the tube cavity. The cold fluid enters the heat exchange core (2) through the inlet cover (3) and flows in the tube cavity. The heat exchange of hot and cold fluids is realized through the circular heat dissipation tube (12) and the baffle heat exchange tube (14).

[0015] Secondary utility model point 1: When the cold fluid flows through the inlet cap (3) and through the diverter plate (8), the cold fluid is diverted by the diverter plate. The hole position of the diverter plate is set to avoid being concentric with the hole position of the heat exchange tube, which enhances the disturbance to the cold fluid and reduces the impact on the end face of the heat exchange core (2), effectively improving the service life of the heat exchanger. In large-diameter heat exchangers, it can avoid the cold side fluid from concentrating in the center of the heat exchanger, causing uneven heat exchange. Secondary utility model point 2: The baffle plate (11) and the flow-blocking heat exchange tube (14) are connected by welding, which plays a supporting role.

[0016] Secondary utility model point 3: When the hot fluid flows into the heat exchange core (2) through the hot fluid inlet (5), it first flows through the circular heat dissipation tube (12). The fluid in the gap between the outermost circular heat dissipation tube (12) and the shell (1) is blocked by the flow-blocking heat exchange tube (14) and then continues to flow through the horizontal circular heat dissipation tube (12) for heat exchange, which is a short-circuit protection design for the fluid in the tube cavity.

[0017] Secondary utility model point 4: The heat exchange tube (14) can be circulated with a medium, thereby realizing the functions of heat exchanger support, short circuit prevention and heat exchange under the same volume without affecting the performance, size and weight of the heat exchanger.

[0018] Hot fluid enters the heat exchange core (2) through the hot fluid inlet (5) and flows in the tube cavity. Cold fluid enters the heat exchange core (2) through the inlet cap (3) and flows in the tube cavity. Through the circular heat dissipation tube (12) and the baffle heat exchange tube (14), the hot and cold fluids exchange heat. The baffle heat exchange tube (14) is arranged on the baffle plate (11) and is located in the gap between the outermost circular heat dissipation tube (12) of the heat exchange core (2) and the shell (1). It is usually arranged radially. When the cold fluid flows through the inlet cap (3) and the flow divider plate (8), the cold fluid is divided by the flow divider plate. The hole position of the flow divider plate is set to avoid concentricity with the hole position of the heat exchange tube, which enhances the disturbance of the cold fluid and reduces the impact on the end face of the heat exchange core (2). This effectively improves the service life of the heat exchanger. In large-diameter heat exchangers, it can avoid the cold side fluid from concentrating in the center of the heat exchanger, which causes uneven heat exchange. When the hot fluid flows into the heat exchange core (2) through the hot fluid inlet (5), it first flows through the circular heat dissipation tube (12). The fluid in the gap between the outermost circular heat dissipation tube (12) and the shell (1) is blocked by the flow-blocking heat exchange tube (14) and then continues to flow through the horizontal circular heat dissipation tube (12) for heat exchange. This achieves a short-circuit protection design for the fluid in the tube cavity without affecting the performance, size and weight of the heat exchanger, while maintaining the same volume. At the same time, the baffle plate (11) and the flow-blocking heat exchange tube (14) are connected by welding, which plays a supporting role.

[0019] The heat dissipation core (2) adopts a tube-type structure.

[0020] The heat dissipation core (2) component baffle (11) adopts an arc-shaped structure and the plate thickness is 2-3mm.

[0021] The cylindrical flange A (10), cylindrical flange B (13), baffle plate (11), circular heat dissipation tube (12), and baffle heat exchange tube (14) of the heat dissipation core (2) are connected by expansion interference fit or brazing.

[0022] The baffle heat exchange tube (14) is arranged on the baffle plate (11) and is located in the gap between the outermost circular heat dissipation tube (12) of the heat exchange core (2) and the shell (1).

[0023] The diverter plate (8) is fixed to the inlet cover (3) by a snap ring (9).

[0024] The baffle heat exchange tube (14) is assembled or spot-welded onto the baffle plate (11).

[0025] The baffle heat exchange tubes (14) are usually arranged radially.

[0026] The number of the baffle heat exchange tubes (14) in the heat dissipation core (2) should not be less than 4 rows, and they should be distributed at an angle.

[0027] The baffle heat exchange tube (14) is symmetrically arranged in the heat dissipation core (2).

[0028] Furthermore, unless otherwise defined, the technical or scientific terms used in this application description shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "upper," "lower," "left," "right," "center," "vertical," "horizontal," "inner," and "outer," etc., used in this application description to indicate relative direction or positional relationship are used only to indicate relative orientation or positional relationship, and do not imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. When the absolute position of the described object changes, its relative positional relationship may also change accordingly, and therefore should not be construed as a limitation on this application. The terms "first," "second," "third," and similar terms used in this application description are used only for descriptive purposes to distinguish different components, and should not be construed as indicating or implying relative importance. The terms "a," "one," or "the," etc., used in this application description should not be construed as an absolute limitation on quantity, but should be construed as indicating the existence of at least one. The terms "including," "comprising," etc., used in this application description mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects.

[0029] Furthermore, it should be noted that, unless otherwise explicitly specified and limited, terms such as “installation,” “connection,” and “linkage” used in the description of this application should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; or it can be a connection within two components. Those skilled in the art can understand its specific meaning in this application according to the specific circumstances.

[0030] The above description is merely a specific embodiment of this utility model and is not intended to limit this utility model. Within the spirit and principles of this utility model, any person skilled in the art may use the above-disclosed technical content to make changes or modifications to equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model, as well as any modifications, equivalent substitutions, improvements, etc., should be included within the protection scope of this utility model.

Claims

1. A fluid diversion and short-circuit prevention heat exchanger tube structure for a shell-and-tube heat exchanger, characterized in that, The system includes a shell (1), a heat exchange core (2), an inlet cap (3), a hot fluid outlet (4), a hot fluid inlet (5), a plug (6), an outlet cap (7), a flow divider (8), and a retaining ring (9). The shell (1) is welded to the heat exchange core (2), and a hot fluid outlet (4) and a hot fluid inlet (5) are provided on the shell (1). The inlet cap (3) is assembled to the cold fluid inlet side of the heat exchange core (2) through a connector, and the outlet cap (7) is assembled to the cold fluid outlet side of the heat exchange core (2) through a connector. The flow divider (8) is connected to the heat exchange core (2) through a connector. The snap ring (9) is assembled on the inlet cover (3). The heat exchange core (2) includes a cylindrical flange A (10), a baffle plate (11), a circular heat dissipation tube (12), a cylindrical flange B (13), and a baffle heat exchange tube (14). The baffle heat exchange tube (14) passes through the baffle plate (11) and is welded together. The cylindrical flange A (10) and the cylindrical flange B (13) are welded to both sides of the baffle heat exchange tube (14). The circular heat dissipation tube (12) passes through the baffle plate (11), and the cylindrical flange A (10) and the cylindrical flange B (13) are welded to both sides of the baffle plate (11).

2. The structure as described in claim 1, characterized in that, Both the inlet cap (3) and the outlet cap (7) are equipped with plugs (6).

3. The structure as described in claim 1, characterized in that, The holes of the diverter plate (8) should be staggered with the holes of the circular heat sink (12).

4. The structure as described in claim 1, characterized in that, The baffle heat exchange tubes (14) are in several units and are arranged radially.

5. The structure as described in claim 1, characterized in that, There are several baffles (11), and each baffle (11) is specifically an arc-shaped structure.

6. The structure as described in claim 1, characterized in that, When there are multiple baffles (11), the cut directions of adjacent baffles (11) are opposite.

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