Shell-and-tube heat exchanger sealing structure

Abstract

The utility model relates to the related field of shell-and-tube heat exchangers, in particular to a shell-and-tube heat exchanger sealing structure which comprises a device body, the device body internally comprises a main tube body, two sets of side tube bodies, a sealing assembly and a monitoring assembly, the two sets of side tube bodies are located at the two ends of the main tube body respectively, and inner flanges are arranged on the two sides of the main tube body; an outer flange is arranged on the inner side of the side pipe body and connected with the inner flange, a lower support is arranged at the bottom of the side pipe body, the sealing assembly is connected between the main pipe body and the side pipe body, the monitoring assembly is installed outside the main pipe body and the side pipe body, the sealing assembly comprises an inner pipe body, and the monitoring assembly comprises an upper sleeve shell and a lower sleeve shell. Double sealing protection at the joint of the inner pipe body and the side pipe body can be achieved, the sealing effect in the heat exchanger can be conveniently improved, the air pressure in the sleeve shell can be monitored, whether gas leakage exists at the flange joint or not can be conveniently observed, and the practicability of the device is improved.

Description

Technical Field

[0001] This utility model relates to the field of shell-and-tube heat exchangers, and in particular to a sealing structure for a shell-and-tube heat exchanger. Background Technology

[0002] Shell-and-tube heat exchangers, also known as tubular heat exchangers, are a type of high-efficiency heat transfer equipment widely used in various industrial fields. The working principle of a shell-and-tube heat exchanger is to transfer heat through the walls of the tube bundle. The hot and cold fluids flow inside the tubes and outside the shell, respectively. The high-temperature fluid transfers heat to the low-temperature fluid through the tube walls, thereby realizing the heat exchange process.

[0003] The prior art utility model patent with publication number CN 212538902 U proposes a shell-and-tube heat exchanger, in which the baffle is a three-quarter circle with tube holes for the tube bundle to pass through. The tube holes are notches, and the tube holes and notches form irregular tube holes. The tube bundle passes through the irregular tube holes, thereby enabling the shell-side fluid to flow without dead angles. This increases heat transfer, enhances air flow, and reduces dust accumulation.

[0004] However, it lacks the traditional flange connection between the pipe body and the end cap, which does not provide a good sealing effect. During long-term use of the equipment, the flange connection is prone to poor airtightness, which leads to poor heat exchange effect and increased energy consumption. When the equipment has airtightness problems, it is also impossible to detect and deal with them in time. Therefore, we need to upgrade and modify the existing technology to overcome the existing problems and shortcomings. Utility Model Content

[0005] The purpose of this invention is to provide a sealing structure for a shell-and-tube heat exchanger to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A sealing structure for a shell-and-tube heat exchanger is designed, comprising a device body, which includes a main tube body, side tube bodies, a sealing assembly, and a monitoring assembly. The side tube bodies are provided in two sets, located at both ends of the main tube body. Inner flanges are provided on both sides of the main tube body. An outer flange is provided on the inner side of the side tube body and is connected to the inner flange. A lower support is provided at the bottom of the side tube body. The sealing assembly is connected between the main tube body and the side tube bodies. The monitoring assembly is installed outside the main tube body and the side tube bodies.

[0008] Furthermore, the sealing assembly includes an inner tube body, a sealing partition is provided on the outer wall of the inner tube body, and an outer sealing gasket and an inner sealing gasket are respectively provided at both ends of the inner tube body, with an outer retaining ring and an inner retaining ring respectively attached to the outer side of the outer sealing gasket and the inner sealing gasket.

[0009] Furthermore, the monitoring component includes an upper housing and a lower housing, which are symmetrically connected. The upper end of the upper housing is connected to a threaded head, and a pressure gauge is provided at the upper end of the threaded head.

[0010] Furthermore, the two ends of the inner tube are respectively inserted into the main tube and the side tube, and the outer and inner retaining rings are set as conical structures and symmetrically fixed on the inner walls of the main tube and the side tube.

[0011] Furthermore, the upper and lower sleeves are fitted outside the inner and outer flanges, and connecting plates are provided on the sides of the upper and lower sleeves respectively, with connecting bolts installed inside the connecting plates.

[0012] Furthermore, the lower end of the pressure gauge passes through the threaded head and extends into the interior of the upper housing. The inner sides of the upper and lower housings are respectively provided with sealing strips, and the two sets of sealing strips are correspondingly attached.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model has an internal flange, an external flange, an internal pipe body, a sealing partition, an external sealing gasket, an external retaining ring, an internal sealing gasket, and an internal retaining ring. The internal pipe body seals the connection between the main pipe body and the side pipe body, and the sealing gasket and retaining ring seal both ends of the internal pipe body. This achieves double sealing protection at the connection between the internal pipe body and the side pipe body, which improves the internal sealing effect of the heat exchanger and prevents poor heat exchange performance caused by poor sealing.

[0015] 2. This utility model has an upper housing, a lower housing, a connecting plate, a connecting bolt, a pressure gauge, a threaded head, and a sealing strip inside the device. The upper housing and the lower housing are installed and fixed by the connecting plate and the connecting bolt, and the pressure gauge is installed and removed by the threaded head. This allows for monitoring of the internal air pressure of the housing, making it easy to observe whether there is a gas leak at the flange connection and to facilitate timely sealing of the leak by the staff.

[0016] Specific embodiments of the present invention are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of the present invention can be employed. It should be understood that the embodiments of the present invention are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present invention include many changes, modifications, and equivalents. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of a shell-and-tube heat exchanger sealing structure according to the present invention.

[0019] Figure 2 This is a schematic diagram of the disassembly and assembly of the upper shell of a shell-and-tube heat exchanger sealing structure according to the present invention.

[0020] Figure 3 This is an exploded view of the sealing assembly of a shell-and-tube heat exchanger sealing structure according to the present invention.

[0021] Figure 4 This is an exploded view of a monitoring component for a sealing structure of a shell-and-tube heat exchanger according to the present invention.

[0022] In the diagram: 1. Device body; 2. Main pipe; 21. Inner flange; 3. Side pipe; 31. Outer flange; 32. Lower support; 4. Sealing assembly; 41. Inner pipe; 42. Sealing partition; 43. Outer gasket; 44. Outer retaining ring; 45. Inner gasket; 46. Inner retaining ring; 5. Monitoring assembly; 51. Upper housing; 52. Lower housing; 53. Connecting plate; 54. Connecting bolt; 55. Pressure gauge; 56. Threaded head; 57. Sealing strip. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] like Figure 1 As shown in Figure 4, the shell-and-tube heat exchanger sealing structure provided in this embodiment includes a device body 1. The device body 1 includes a main tube body 2, a side tube body 3, a sealing assembly 4, and a monitoring assembly 5. The side tube body 3 is provided with two sets and is located at both ends of the main tube body 2. The main tube body 2 is provided with inner flanges 21 on both sides. The side tube body 3 is provided with an outer flange 31 on the inner side and the outer flange 31 is connected to the inner flange 21. The bottom of the side tube body 3 is provided with a lower support 32. The sealing assembly 4 is connected between the main tube body 2 and the side tube body 3. The monitoring assembly 5 is installed on the outside of the main tube body 2 and the side tube body 3.

[0025] Preferably, the sealing assembly 4 includes an inner tube 41, a sealing partition 42 is provided on the outer wall of the inner tube 41, an outer sealing gasket 43 and an inner sealing gasket 45 are respectively provided at both ends of the inner tube 41, an outer retaining ring 44 and an inner retaining ring 46 are respectively attached to the outer side of the outer sealing gasket 43 and the inner sealing gasket 45, and both ends of the inner tube 41 are respectively inserted into the main tube 2 and the side tube 3, and the outer retaining ring 44 and the inner retaining ring 46 are set as conical structures and symmetrically fixed on the inner walls of the main tube 2 and the side tube 3;

[0026] The main tube 2 and the side tube 3 are connected by the inner tube 41, so that the sealing partition 42 is in the middle. The two ends of the inner tube 41 are attached to the outer baffle 44 and the inner baffle 46 by the outer sealing gasket 43 and the inner sealing gasket 45 respectively. This can achieve double sealing protection for the tubes on both sides of the heat exchanger, which can improve the internal sealing effect of the heat exchanger, prevent the problem of poor heat exchange effect due to poor sealing, and improve the reliability of the device.

[0027] Preferably, the monitoring component 5 includes an upper housing 51 and a lower housing 52, which are symmetrically connected. The upper end of the upper housing 51 is connected to a threaded head 56, and a pressure gauge 55 is provided at the upper end of the threaded head 56. The upper housing 51 and the lower housing 52 are fitted outside the inner flange 21 and the outer flange 31. The sides of the upper housing 51 and the lower housing 52 are provided with connecting plates 53, and connecting bolts 54 are installed in the connecting plates 53. The lower end of the pressure gauge 55 passes through the threaded head 56 and extends into the interior of the upper housing 51. Sealing strips 57 are respectively provided on the inner sides of the upper housing 51 and the lower housing 52, and the two sets of sealing strips 57 are correspondingly attached.

[0028] The upper housing 51 and the lower housing 52 are connected to the outer sides of the inner flange 21 and the outer flange 31 by the connecting plate 53 and the connecting bolt 54. The pressure gauge 55 is installed on the upper housing 51 and communicates with the inside by the threaded head 56, which facilitates the monitoring of the internal pressure of the two housings, facilitates the observation of whether there is a gas leak at the flange connection, and facilitates the timely sealing of the leak by the staff, thus improving the practicality of the device.

[0029] The working principle and process of this utility model are as follows: During use, the inner tube 41 can be inserted into the main tube 2 and the side tube 3, so that the sealing partition 42 is located inside the flange connection. The outer sealing gasket 43 and the inner sealing gasket 45 are respectively attached to the outer retaining ring 44 and the inner retaining ring 46. The inner tube 41 reduces the risk of gas leakage from the flange connection. The side sealing performance of the inner tube 41 is further improved by the cooperation of the sealing gaskets and retaining rings on both sides. This can achieve double sealing protection for the connection between the main tube 2 and the side tube 3, and improve the working quality and stability of the heat exchanger. During operation, the upper sleeve 51 and the lower sleeve 52 are connected to the outer side of the inner flange 21 and the outer flange 31 by the connecting plate 53 and the connecting bolt 54. The pressure gauge 55 is installed on the upper sleeve 51 and connected to the inside by the threaded head 56. The pressure gauge 55 monitors the internal pressure in real time, which makes it easy to observe whether there is a gas leakage problem at the flange connection and facilitates the staff to seal and repair the leak in time.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "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; it can be a connection within 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.

[0031] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

Claims

1. A sealing structure for a shell-and-tube heat exchanger, characterized in that: The device includes a main body (1), which contains a main body (2), a side tube (3), a sealing assembly (4), and a monitoring assembly (5). The side tube (3) is provided in two sets and is located at both ends of the main body (2). The main body (2) is provided with inner flanges (21) on both sides. The side tube (3) is provided with an outer flange (31) on the inner side and the outer flange (31) is connected to the inner flange (21). The bottom of the side tube (3) is provided with a lower support (32). The sealing assembly (4) is connected between the main body (2) and the side tube (3). The monitoring assembly (5) is installed outside the main body (2) and the side tube (3).

2. The sealing structure for a shell-and-tube heat exchanger according to claim 1, characterized in that: The sealing assembly (4) includes an inner tube (41), a sealing partition (42) is provided on the outer wall of the inner tube (41), an outer sealing gasket (43) and an inner sealing gasket (45) are respectively provided at both ends of the inner tube (41), and an outer retaining ring (44) and an inner retaining ring (46) are respectively attached to the outer side of the outer sealing gasket (43) and the inner sealing gasket (45).

3. The sealing structure of a shell-and-tube heat exchanger according to claim 1, characterized in that: The monitoring component (5) includes an upper shell (51) and a lower shell (52), which are symmetrically connected. The upper shell (51) is connected to a threaded head (56) and a pressure gauge (55) is provided on the upper end of the threaded head (56).

4. The sealing structure of a shell-and-tube heat exchanger according to claim 2, characterized in that: The inner tube (41) is inserted into the main tube (2) and the side tube (3) at both ends, and the outer retaining ring (44) and the inner retaining ring (46) are set as conical structures and symmetrically fixed on the inner walls of the main tube (2) and the side tube (3).

5. The sealing structure of a shell-and-tube heat exchanger according to claim 3, characterized in that: The upper sleeve (51) and the lower sleeve (52) are fitted outside the inner flange (21) and the outer flange (31). The upper sleeve (51) and the lower sleeve (52) are respectively provided with connecting plates (53) on their sides. Connecting bolts (54) are installed in the connecting plates (53).

6. The sealing structure of a shell-and-tube heat exchanger according to claim 3, characterized in that: The lower end of the pressure gauge (55) passes through the threaded head (56) and extends into the interior of the upper housing (51). The inner sides of the upper housing (51) and the lower housing (52) are respectively provided with sealing strips (57) and the two sets of sealing strips (57) are attached to each other.

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