Shell-and-tube heat exchanger with high sealing performance

Abstract

The utility model provides a shell-and-tube heat exchanger with high sealing performance, which comprises a barrel body, temperature difference compensation joints, tube plates, uniform sealing rings, baffle plates, heat exchange tubes and tube orifices, and the barrel body is respectively communicated with a front-end tube box and a rear-end tube box through the temperature difference compensation joints; the tube plates and the uniform sealing rings are fixedly installed at the two ends of the interior of the barrel, the baffle plates are fixedly installed in the barrel in a staggered mode, and the heat exchange tubes are fixedly installed on the two tube plates and the baffle plates. The two pipe openings are formed in the cylinder body; the temperature difference compensation connector enables a shell-and-tube heat exchanger to adapt to temperature difference changes, and ensures connection stability and sealing performance. The temperature difference compensation connector compensates temperature difference changes through flexible stretching and retracting, uneven stress caused by uneven pressure is reduced through the even sealing ring, and the crack risk is reduced. The design obviously improves the sealing performance and stability of the heat exchanger.

Description

Technical Field

[0001] The utility model belongs to the technical field of tube and shell heat exchanger sealing, in particular to a tube and shell heat exchanger with high sealing performance. Background Art

[0002] Shell and tube heat exchangers play an important role in key industrial fields such as petrochemicals and nuclear power. Their core function is to achieve heat exchange between different fluids, thereby effectively cooling or heating the fluids. In this process, the stability of the sealing performance directly determines the operating efficiency and safety of the heat exchanger.

[0003] The shell and tube heat exchanger is composed of several key components, including the shell (cylinder), heat transfer tube bundle, tube sheet, baffle (baffle), front and rear tube boxes, etc. The ingenious combination of these components ensures the compactness of the overall structure of the heat exchanger, which is not only easy to manufacture, but also easy to install and maintain.

[0004] However, the current shell and tube heat exchanger faces some challenges in terms of sealing performance. The connection between the front and rear tube boxes and the cylinder usually adopts a simple sealing flange structure. This connection method will cause expansion and contraction at the connection when there is a temperature difference between the tube box and the cylinder. After long-term operation, it may seriously affect the sealing performance and increase the risk of leakage.

[0005] In addition, there are also problems with the connection between the baffle and the tube sheet. After long-term pressure erosion, traditional rigid welding connections are prone to cracks and even penetration, which not only affects the normal operation of the heat exchanger, but also poses a threat to the working environment and personnel safety.

[0006] Therefore, it is very necessary to invent a shell and tube heat exchanger with high sealing performance. Utility Model Content

[0007] In order to solve the above technical problems, the utility model provides a highly sealed shell and tube heat exchanger, comprising a cylinder, a temperature difference compensation joint, a tube sheet, a uniform sealing ring, a baffle, a heat exchange tube and a pipe opening, wherein the cylinder is respectively connected with the front end and the rear end pipe box through the temperature difference compensation joint; the tube sheet and the uniform sealing ring are fixedly installed at both ends of the cylinder, and a plurality of baffles are staggered and fixedly installed inside, and a plurality of heat exchange tubes are fixedly installed on the two tube sheets and the baffles; two pipe openings are arranged on the cylinder;

[0008] The temperature difference compensation joint includes a flange, a sealing rubber pad, an elastic compensation member, and a flange hole. There are two flanges. The sealing rubber pad and the elastic compensation member are arranged between the two flanges. The flange hole is provided on the flange, the sealing rubber pad, and the elastic compensation member. A bolt passes through the flange holes provided by the three and is connected to the cylinder body or the front and rear tube sheets.

[0009] Preferably, the tube sheet and the baffle plate are provided with tube holes allowing the heat exchange tubes to pass through fixedly. A number of the heat exchange tubes together form a tube bundle, which is divided into an upper tube bundle part and a lower tube bundle part.

[0010] Preferably, the tube sheet is of a circular structure. An even sealing ring is provided at the joint of the tube sheet and the cylinder body. The even sealing ring is fixedly connected to the outer surface of the tube sheet and the inner surface of the cylinder body respectively. The even sealing ring has an arc-shaped surface, and the cross-section of the even sealing ring is an inwardly concave arc-edge right triangle.

[0011] Preferably, the sealing rubber pad is located between the two flanges, and its cross-section is in a "U" shape. An elastic compensation member is arranged inside the sealing rubber pad. The cross-section of the elastic compensation member is in a "W" shape structure, and the elastic compensation member is made of spring steel.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] Based on the traditional flange connection, the utility model has made significant innovations and introduced a unique temperature difference compensation joint. This joint is carefully designed and selected materials, with excellent compensation flexibility, capable of flexibly adapting to the expansion and contraction of the connection caused by temperature difference changes, thus ensuring the stability and sealing performance of the connection. In addition, the specially added even sealing ring effectively reduces the uneven stress caused by uneven pressure distribution at the connection, greatly reducing the risk of cracks or ruptures caused by uneven pressure. It significantly improves the sealing performance and stability of the shell-and-tube heat exchanger, enabling it to operate more reliably in complex industrial environments and meeting the industrial requirements for efficient, safe, and reliable heat exchange equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the overall structural schematic diagram of the utility model.

[0015] Figure 2 is the semi-sectional structural schematic diagram of the utility model.

[0016] Figure 3 is the utility model Figure 2 partial enlarged structural schematic diagram at A.

[0017] In the figure:

[0018] Cylinder 1, temperature difference compensation joint 2, flange 21, sealing rubber pad 22, elastic compensation part 23, flange hole 24, tube sheet 3, uniform sealing ring 4, baffle 5, heat exchange tube 6, and pipe mouth 7. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be described clearly and completely below. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0020] In the description of the embodiments, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0021] As attached Figure 1 To Attachment Figure 3 As shown:

[0022] The utility model provides a highly sealed shell and tube heat exchanger, comprising a cylinder 1, a temperature difference compensation joint 2, a tube sheet 3, a uniform sealing ring 4, a baffle 5, a heat exchange tube 6 and a pipe opening 7, wherein the cylinder 1 is respectively connected with the front end and the rear end pipe boxes through the temperature difference compensation joint 2; the tube sheet 3 and the uniform sealing ring 4 are fixedly installed at both ends of the cylinder 1, and a plurality of the baffles 5 are staggered and fixedly installed inside, and a plurality of the heat exchange tubes 6 are fixedly installed on the two tube sheets 3 and the baffles 5; and two pipe openings 7 are provided on the cylinder 1.

[0023] The temperature difference compensation joint 2 includes a flange 21, a sealing rubber pad 22, an elastic compensator 23 and a flange hole 24. There are two flanges 21, and the sealing rubber pad 22 and the elastic compensator 23 are arranged between the two flanges 21. The flange hole 24 is provided on the flange 21, the sealing rubber pad 22 and the elastic compensator 23. Bolts pass through the flange holes 24 provided by the three and are connected to the cylinder 1 or the front and rear tube sheets. The temperature difference compensation joint 2 has excellent compensation flexibility, can flexibly adapt to the expansion and contraction of the connection caused by temperature difference changes, so as to ensure the stability and tightness of the connection are not affected.

[0024] Embodiment 1:

[0025] Specifically, the tube sheet 3 and the baffle 5 are provided with tube holes allowing the heat exchange tubes 6 to pass through fixedly. A number of the heat exchange tubes 6 together form a tube bundle, which is divided into an upper tube bundle part and a lower tube bundle part. In practical applications, the heat exchange tubes 6 are fixed on the tube sheet 3 and the baffle 5 through the tube holes to form a complete heat transfer system. This design enables the heat exchanger to effectively transfer heat from one fluid to another fluid during operation, achieving the purpose of cooling or heating.

[0026] Specifically, the tube sheet 3 is of a circular structure. At the joint between the tube sheet 3 and the cylinder 1, a uniform sealing ring 4 is specially provided. The sealing ring is firmly connected to the outer surface of the tube sheet 3 and the inner surface of the cylinder 1 respectively, ensuring the tightness of the joint. The design of the uniform sealing ring 4 is ingenious, and its surface is arc-shaped. This design can effectively reduce the uneven stress caused by uneven pressure distribution at the joint, thus preventing cracks or ruptures caused by uneven pressure. More importantly, the cross-section of the uniform sealing ring 4 is an inward concave arc-edge right triangle, and this unique cross-sectional shape further enhances its sealing performance, ensuring that the heat exchanger can operate stably and reliably in a complex and changeable industrial environment.

[0027] Specifically, the sealing rubber pad 22 is located between the two flanges 21, and its cross-section is in a "U" shape. This design can ensure a tight fit between the sealing rubber pad 22 and the flange 21, effectively preventing fluid leakage. In addition, in order to further enhance the sealing performance and cope with the expansion and contraction caused by temperature difference changes, an elastic compensator 23 is provided inside the sealing rubber pad 22. The cross-section of the elastic compensator 23 is a "W" type structure. This structure enables the compensator to deform when subjected to pressure or temperature changes, thereby effectively compensating for the displacement changes at the joint and maintaining the tightness of the seal.

[0028] Embodiment 2:

[0029] First, the temperature difference compensation joint 2 realizes flexible compensation for the expansion or contraction caused by temperature difference changes between the tube sheet and the cylinder 1 through the combination of the flange 21, the sealing rubber gasket 22, the elastic compensation member 23 and the flange hole 24. The "U"-shaped cross-section of the sealing rubber gasket 22 fits closely with the flange 21, effectively preventing fluid leakage. The elastic compensation member 23 with a "W"-shaped cross-section made of spring steel can deform to compensate for the displacement change at the connection and maintain the tightness of the seal.

[0030] Secondly, the uniform sealing ring 4 is located at the joint between the tube sheet 3 and the cylinder 1. Its cross-sectional shape of an inwards-concave arc-edge right triangle and the arc design not only reduce the uneven stress caused by uneven pressure distribution, prevent cracks or ruptures, but also further enhance the sealing performance, ensuring the stable and reliable operation of the heat exchanger in a complex and changeable industrial environment.

[0031] During the heat exchange process, several heat exchange tubes 6 are fixed on the tube sheet 3 and the baffle plate 5 through tube holes, jointly forming a tube bundle, which is divided into an upper tube bundle part and a lower tube bundle part. Two kinds of fluids, hot and cold, flow inside and outside the tubes respectively, and heat exchange is carried out through the wall surface of the heat exchange tubes to realize the cooling or heating of the fluids. In addition, the baffle plates 5 are交错固定安装 inside the cylinder 1. Their function is to force the fluid to pass through the tube bundle horizontally multiple times along the specified path, enhancing the degree of fluid turbulence, thereby improving the heat exchange efficiency.

[0032] Using the technical solution of the present utility model, or a person skilled in the art designing a similar technical solution inspired by the technical solution of the present utility model and achieving the above technical effects shall fall within the protection scope of the present utility model.

Claims

1. A highly sealed shell and tube heat exchanger, characterized in that: It includes a cylinder body (1), a temperature difference compensation joint (2), a tube sheet (3), a uniform sealing ring (4), a baffle plate (5), heat exchange tubes (6) and pipe orifices (7). The cylinder body (1) is respectively communicated with the front-end and rear-end tube boxes through the temperature difference compensation joint (2). The tube sheet (3) and the uniform sealing ring (4) are fixedly installed at both ends inside the cylinder body (1), and a number of the baffle plates (5) are fixedly installed in an alternating manner inside. A number of the heat exchange tubes (6) are fixedly installed on the two tube sheets (3) and the baffle plates (5). Two pipe orifices (7) are provided on the cylinder body (1). The temperature difference compensation joint (2) includes a flange plate (21), a sealing rubber pad (22), an elastic compensation member (23) and a flange hole (24). There are two flange plates (21). The sealing rubber pad (22) and the elastic compensation member (23) are arranged between the two flange plates (21). The flange hole (24) is provided on the flange plate (21), the sealing rubber pad (22) and the elastic compensation member (23). A bolt passes through the flange hole (24) provided by the three and is connected to the cylinder body (1) or the front-end and rear-end tube boxes.

2. A highly sealed shell and tube heat exchanger according to claim 1, characterized in that: The tube sheet (3) and the baffle plate (5) are provided with tube holes allowing the heat exchange tubes (6) to be fixedly passed through. A number of the heat exchange tubes (6) together form a tube bundle, which is divided into an upper tube bundle part and a lower tube bundle part.

3. A highly sealed shell and tube heat exchanger according to claim 1, characterized in that: The tube sheet (3) has a circular structure. The uniform sealing ring (4) is provided at the joint of the tube sheet (3) and the cylinder body (1). The uniform sealing ring (4) is fixedly connected to the outer surface of the tube sheet (3) and the inner surface of the cylinder body (1) respectively. The uniform sealing ring (4) has an arc-shaped surface, and the cross-section of the uniform sealing ring (4) is an inwardly concave arc-edge right triangle.

4. A highly sealed shell and tube heat exchanger according to claim 1, characterized in that: The sealing rubber pad (22) is located between the two flange plates (21), and its cross-section is in a "U" shape. The elastic compensation member (23) is arranged inside the sealing rubber pad (22). The cross-section of the elastic compensation member (23) is in a "W" shape structure, and the elastic compensation member (23) is made of spring steel.

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