Reinforced pipe blocking structure, heat exchange pipe assembly and heat exchanger

Abstract

The utility model discloses a reinforcing and pipe blocking structure, a heat exchange pipe assembly and a heat exchanger, the reinforcing and pipe blocking structure is used for reinforcing and blocking a broken heat exchange pipe, and the reinforcing and pipe blocking structure comprises a supporting piece and a plug; the supporting piece is inserted into the broken heat exchange pipe and used for supporting the broken position of the heat exchange pipe. And the plug is arranged at the end part of the broken heat exchange tube to plug the heat exchange tube. According to the utility model, not only is a medium prevented from leaking between the pipe side and the shell side through the plug, but also the cracked heat exchange pipe is supported and reinforced through the supporting piece, so that the phenomenon that the cracking condition of the heat exchange pipe is further expanded until the heat exchange pipe is cracked after the heat exchange pipe is blocked by the plug is prevented; therefore, the risk of secondary adverse effects on peripheral heat exchange tubes caused by heat exchange tube breakage is avoided, the safety of the heat exchanger is improved, and the performance of the heat exchanger is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, and in particular to a reinforced tube plugging structure, a heat exchange tube assembly, and a heat exchanger. Background Technology

[0002] In heat exchangers used in industries such as nuclear power and petrochemicals, multiple heat exchange tubes are typically installed inside the heat exchanger. The ends of the heat exchange tubes are welded to or expanded to the tube sheet. Cold and hot fluids flow inside and outside the heat exchange tubes, respectively, and heat is transferred through the tube walls to achieve the function of heating or cooling the medium. The inside of the heat exchange tubes is called the tube side, and the outside of the heat exchange tubes is called the shell side.

[0003] Once a heat exchanger tube ruptures, the pressure boundary is disrupted, leading to leakage. This mixing of the media on the tube and shell sides not only reduces heat exchange capacity but also affects the composition of the media on both sides. Therefore, it is necessary to treat the ruptured heat exchanger tube to mitigate its adverse effects. The treatment method involves plugging the heat exchanger tube, specifically by sealing the ruptured tube at the tube sheet with a plug to prevent the media from flowing through. Currently, the plug is typically connected to the heat exchanger tube or tube sheet via welding or expansion joints.

[0004] Current heat exchanger tube plugging methods, such as Figure 1 As shown, plug 2 is used to seal the heat exchange tube 3. The plug is welded to the tube sheet 4 and the ruptured heat exchange tube 3, forming an isolation boundary at the weld. Although this can solve the leakage problem after the heat exchange tube ruptures, it does not address the rupture point itself. With the continuous operation of the heat exchanger, the rupture point may further expand until it completely breaks at the break. Once a heat exchange tube breaks, it may impact surrounding heat exchange tubes due to fluid impact, causing secondary damage. Even worse, if the heat exchange tube breaks at both ends and detaches from the support, it may become a foreign object inside the heat exchanger, making maintenance even more difficult. Utility Model Content

[0005] The purpose of this invention is to provide a reinforced tube-blocking structure, which aims to solve the problem that existing tube-blocking methods cannot prevent the continued cracking and expansion of ruptured heat exchange tubes during subsequent operation, until they may break and affect other normal heat exchange tubes.

[0006] To solve the above-mentioned technical problems, the purpose of this utility model is achieved through the following technical solution: providing a reinforced tube plugging structure for reinforcing and plugging ruptured heat exchange tubes, the reinforced tube plugging structure comprising:

[0007] A support member is inserted inside the ruptured heat exchange tube and is used to support the ruptured part of the heat exchange tube.

[0008] A plug is placed at the end of a ruptured heat exchange tube to seal it.

[0009] Furthermore, one end of the support member is fixedly connected to one end of the plug.

[0010] Furthermore, the method by which one end of the support member is fixedly connected to one end of the plug is at least one of threaded connection, welding, plug-in connection, and hook connection.

[0011] Furthermore, the support includes a rigid straight pipe / rod; when the rupture point of the heat exchange tube is located in the straight section of the heat exchange tube, the rigid straight pipe / rod is inserted into the rupture point of the straight section.

[0012] Furthermore, the rigid straight tube / rod is made of a metal or non-metal material with bending resistance.

[0013] Furthermore, the support includes a flexible tube / rod; when the rupture point of the heat exchange tube is located in the bend section of the heat exchange tube, the flexible tube / rod is inserted into the rupture point of the bend section.

[0014] Furthermore, the flexible tube / rod is made of a metal or non-metal material that can be bent and deformed.

[0015] Furthermore, the plug is sealed at the end of the ruptured heat exchange tube by welding or expansion.

[0016] This utility model embodiment also provides a heat exchange tube assembly, including a tube sheet and multiple heat exchange tubes disposed on the tube sheet; the heat exchange tubes are used to reinforce and plug the tubes using the reinforcement and plugging structure described above when a rupture occurs.

[0017] This utility model embodiment also provides a heat exchanger, including the heat exchange tube assembly as described above.

[0018] The beneficial effects of this utility model embodiment are as follows: it not only prevents the medium from leaking between the tube side and the shell side through the ruptured heat exchange tube by plugging, but also supports and reinforces the ruptured heat exchange tube by the support member, preventing the rupture of the heat exchange tube from further expanding until it breaks after plugging the tube, thereby avoiding the risk of secondary adverse effects of the ruptured heat exchange tube on the surrounding heat exchange tubes, improving the safety of the heat exchanger and ensuring the performance of the heat exchanger. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1This is a schematic diagram of a structure for sealing a ruptured heat exchange tube using existing technology.

[0021] Figure 2 This is a schematic diagram of the reinforcement and plugging structure provided in this embodiment of the present invention for sealing ruptures in the straight section of the heat exchange tube.

[0022] Figure 3 This is a schematic diagram of the reinforcement and plugging structure provided in this embodiment of the present invention for sealing ruptures in the bend section of the heat exchange tube.

[0023] Explanation of the markings in the image:

[0024] 1. Support components; 2. Plugs; 3. Heat exchange tubes; 4. Tube sheets. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0027] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0028] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0029] Please see Figure 2 and Figure 3 This utility model embodiment provides a reinforced plugging structure for reinforcing and plugging a ruptured heat exchange tube 3. The reinforced plugging structure includes:

[0030] Support 1 is inserted into the ruptured heat exchange tube 3 and is used to support the ruptured part of the heat exchange tube 3.

[0031] Plug 2 is placed at the end of the ruptured heat exchange tube 3 to seal the heat exchange tube 3.

[0032] In this embodiment, in addition to using the plug 2 to seal the heat exchange tube 3, a support member 1 is added. The support member 1 is rod-shaped and adapted to the internal space of the heat exchange tube 3. That is, the outer diameter of the support member 1 can be slightly smaller than the inner diameter of the heat exchange tube 3. After the support member 1 is inserted into the heat exchange tube 3 and positioned at the rupture point, it can support the rupture point and thus prevent the rupture from spreading.

[0033] This embodiment not only prevents the medium from leaking between the tube side and the shell side through the ruptured heat exchange tube 3 by the plug 2, but also supports and reinforces the ruptured heat exchange tube 3 by the support member 1, preventing the rupture of the heat exchange tube 3 from further expanding until it breaks after the plug 2 blocks the tube. This avoids the risk of secondary adverse effects of the ruptured heat exchange tube 3 on the surrounding heat exchange tubes, improves the safety of the heat exchanger, and ensures the performance of the heat exchanger.

[0034] In one embodiment, one end of the support member 1 is fixedly connected to one end of the plug 2.

[0035] In this embodiment, to ensure the stability of the support member 1 after it is inserted into the heat exchange tube 3, one end of the support member 1 is fixedly connected to one end of the plug 2. By utilizing the relative stability between the plug 2 and the heat exchange tube 3, the support member 1 can also remain stable, thereby ensuring the support effect on the broken part of the heat exchange tube 3.

[0036] In one embodiment, one end of the support member 1 is fixedly connected to one end of the plug 2 by at least one of threaded connection, welding, plugging, and hook connection.

[0037] In this embodiment, one end of the support member 1 and one end of the plug 2 are preferably fixed by welding, that is, welding is performed first to form an integral part (i.e., Figure 2 and Figure 3 Welding is performed at position a), then the support 1 is inserted into the heat exchange tube 3, and the plug 2 is sealed and fixed at the end of the heat exchange tube 3. The entire process of reinforcing and plugging the tube is completed. The operation is simple and convenient.

[0038] In one embodiment, the support member 1 includes a rigid straight pipe / rod; when the rupture point of the heat exchange tube 3 is located in the straight section of the heat exchange tube 3, the rigid straight pipe / rod is inserted into the rupture point of the straight section.

[0039] In this embodiment, the heat exchange tube 3 typically has straight sections and bends, such as... Figure 2 The straight pipe section shown has a rupture point at location c in the straight pipe section area. In this case, the support member 1 is a rigid straight pipe / rod. After the rigid straight pipe / rod is inserted, it corresponds to the straight pipe section area, thereby achieving reinforcement support for the rupture point to ensure that the rupture does not extend.

[0040] Preferably, the rigid straight pipe / rod is made of a metal or non-metal material with bending resistance and high hardness, which ensures the stability of the reinforcement support. Examples include corrosion-resistant metal materials such as stainless steel, titanium alloy, and aluminum alloy, and non-metal materials such as rubber, plastic, and some special composite materials. This embodiment preferably uses a metal material with high hardness and low cost, such as stainless steel pipe / rod, which provides good support and is easy to weld to the plug 2.

[0041] In one embodiment, the support member 1 includes a flexible tube; when the rupture point of the heat exchange tube 3 is located in the bend section of the heat exchange tube 3, the flexible tube is inserted into the rupture point of the bend section.

[0042] In this embodiment, as Figure 3 The bend in the pipe section shown is located at point c. In this case, the support 1 cannot be a rigid straight pipe / rod. The support 1 needs to be able to adapt to the shape of the bend. Therefore, a flexible pipe / rod that can be flexibly bent can be used to support the rupture at point c of the bend.

[0043] In this embodiment, the flexible tube can be made of metal or non-metal materials that can be bent and deformed, preferably metal materials such as metal wire, metal hose, or steel wire rope; which can meet the rigidity required for support and also adapt to the bending shape of the bend section.

[0044] In one embodiment, the plug 2 is sealed at the end of the ruptured heat exchange tube 3 by welding or expansion.

[0045] In this embodiment, a plug 2 is used to seal the end of the heat exchange tube 3, and the plug 2 is welded to the tube sheet 4 and the broken heat exchange tube 3, that is, in Figure 2 and Figure 3 Welding at position b will create an isolation boundary at the weld.

[0046] This utility model embodiment also provides a heat exchange tube assembly, including a tube sheet 4 and a plurality of heat exchange tubes 3 disposed on the tube sheet 4; the heat exchange tubes 3 are used to reinforce and plug the tubes using the above-mentioned reinforcement and plugging structure when a rupture occurs.

[0047] This utility model embodiment also provides a heat exchanger, including the heat exchange tube assembly as described above.

[0048] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A reinforced tube-plugging structure for reinforcing and plugging ruptured heat exchange tubes, characterized in that, The reinforced plugging structure includes: A support member is inserted inside the ruptured heat exchange tube and is used to support the ruptured part of the heat exchange tube. A plug is placed at the end of a ruptured heat exchange tube to seal it. The support member includes a rigid straight pipe / rod; when the rupture point of the heat exchange tube is located in the straight section of the heat exchange tube, the rigid straight pipe / rod is inserted into the rupture point of the straight section; or, the support member includes a flexible pipe / rod; when the rupture point of the heat exchange tube is located in the bend section of the heat exchange tube, the flexible pipe / rod is inserted into the rupture point of the bend section.

2. The reinforced pipe-blocking structure according to claim 1, characterized in that, One end of the support member is fixedly connected to one end of the plug.

3. The reinforced plugging structure according to claim 2, characterized in that, The method by which one end of the support member is fixedly connected to one end of the plug is at least one of threaded connection, welding, plugging, and hook connection.

4. The reinforced pipe-plugging structure according to claim 1, characterized in that, The rigid straight tube / rod is made of a metal or non-metal material with bending resistance.

5. The reinforced plugging structure according to claim 1, characterized in that, The flexible tube / rod is made of a metal or non-metal material that can be bent and deformed.

6. The reinforced plugging structure according to claim 1, characterized in that, The plug is sealed at the end of the ruptured heat exchange tube by welding or expansion.

7. A heat exchanger tube assembly, characterized in that, It includes a tube sheet and multiple heat exchange tubes disposed on the tube sheet; the heat exchange tubes are used to reinforce and plug the tubes in the event of a rupture using the tube reinforcement and plugging structure as described in any one of claims 1 to 6.

8. A heat exchanger, characterized in that, Includes the heat exchange tube assembly as described in claim 7.

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