Anti-vibration U-shaped tube heat exchanger

Abstract

The utility model relates to the technical field of U-shaped tube heat exchangers, in particular to an anti-vibration U-shaped tube heat exchanger which comprises a U-shaped tube heat exchanger tube bundle and reinforcing fixing ribs. The reinforcing fixing rib comprises a connecting rib and a locking piece, the connecting rib is arranged on the outer side of the U-shaped tube heat exchanger tube bundle in a sleeving mode, and the locking piece is connected between the two ends of the connecting rib. The reinforcing fixing ribs are arranged on the outer side of the U-shaped tube heat exchanger tube bundle in a sleeving mode to restrain the U-shaped tube heat exchanger tube bundle, so that the U-shaped tube heat exchanger tube bundle is stressed more evenly, cracks are prevented from occurring in the use process of the U-shaped tube heat exchanger tube bundle, and the maintenance and repair cost and time are reduced; meanwhile, the reinforcing fixing ribs are arranged to restrain vibration of the U-shaped tube heat exchanger tube bundle, the U-shaped tube heat exchanger tube bundle is prevented from being broken due to metal fatigue caused by vibration, cost is reduced, and working efficiency is improved. And meanwhile, collision between the adjacent U-shaped heat exchange tubes is avoided while vibration of the U-shaped tube heat exchanger tube bundle is avoided, and the service life of the U-shaped tube heat exchanger tube bundle is further prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of U-tube heat exchangers, and particularly relates to an anti-vibration U-tube heat exchanger. Background Technique

[0002] The U-tube heat exchanger is a widely used heat exchanger. In the U-tube heat exchanger, since the tube bundle can freely expand and contract, thermal stress will not be generated due to the temperature difference between the tube side and the shell side, and its thermal compensation performance is good. It is widely used in heat exchange convective heat transfer in the fields of chemical industry, petroleum, medicine, food, light industry, metallurgy, coking, etc., as well as heat exchange and condensation processes such as steam condensation and liquid evaporation heat transfer. Moreover, the tube bundle can be withdrawn from the shell, which is convenient for maintenance and cleaning. Its structure is simple, the production cost is relatively low, the tube side is a double tube side, the flow path is long, the flow velocity is high, the heat transfer performance is good, and the pressure-bearing capacity is strong.

[0003] For example, the Chinese utility model patent with the application number 200920164502.2 discloses a general pressure test device for a U-tube heat exchanger tube bundle. The U-tube heat exchanger tube bundle is composed of multiple U-shaped heat exchange tubes arranged in an array on the flange of the U-tube heat exchanger tube bundle. The fluid to be heated and exchanged is on the outer side of the U-tube heat exchanger tube bundle, and a heat exchange medium is introduced into the inside of the U-tube heat exchanger tube bundle, so as to complete heat exchange by contacting with the external fluid through the U-tube heat exchanger.

[0004] However, it is found in the actual use process that when the temperature difference between the tube side and the shell side is too large or the flow velocity inside the U-tube heat exchanger tube bundle is too high, the tube bundle vibrates. Under the action of cyclic stress, the U-tube heat exchanger tube bundle is prone to form metal fatigue, resulting in cracks or even fractures. On the one hand, it will cause damage to the heat exchanger and increase the maintenance and repair costs; on the other hand, it will cause pollution to the fluid that needs to be heat-exchanged, resulting in waste of materials, requiring shutdown and production suspension, reducing production efficiency, increasing production costs, and not meeting the actual use requirements. Content of the Utility Model

[0005] The purpose of the utility model is to provide an anti-vibration U-tube heat exchanger to solve the technical problem that the current U-tube heat exchanger is easily damaged due to vibration.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] An anti-vibration U-tube heat exchanger includes a U-tube heat exchanger tube bundle and a strengthening and fixing rib movably connected to the U-tube heat exchanger tube bundle;

[0008] The strengthening and fixing rib includes a connecting rib and a locking member. The connecting rib is sleeved on the outer side of the U-tube heat exchanger tube bundle, and the locking member is connected between the two ends of the connecting rib.

[0009] Further defined, the connecting rib is of a columnar structure.

[0010] Further defined, the connecting rib is a flat steel.

[0011] Further defined, the number of the reinforcing and fixing ribs is multiple, and the multiple reinforcing and fixing ribs are arranged at equal intervals along the axis of the U-shaped tube heat exchanger tube bundle.

[0012] Further defined, the number of the reinforcing and fixing ribs is three.

[0013] Further defined, the locking member includes a bolt connected to one end of the connecting rib and a nut connected to the other end of the connecting rib, and the bolt is matched with the nut.

[0014] Further defined, the two ends of the connecting rib are fixedly connected through the locking member.

[0015] Further defined, a plurality of flow guiding grooves are formed in the connecting rib, and the plurality of flow guiding grooves are arranged at equal intervals along the axis of the connecting rib.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] 1. The present utility model restricts the U-shaped tube heat exchanger tube bundle by sleeving a reinforcing and fixing rib outside the U-shaped tube heat exchanger tube bundle, so that the force on the U-shaped tube heat exchanger tube bundle is more uniform, the overall structural strength of the U-shaped heat exchanger is enhanced, cracks in the U-shaped tube heat exchanger tube bundle during use are avoided, and the maintenance and repair costs and time are reduced; at the same time, the vibration of the U-shaped tube heat exchanger tube bundle is inhibited by setting the reinforcing and fixing rib, the fracture caused by metal fatigue due to the vibration of the U-shaped tube heat exchanger tube bundle is avoided, the cost is reduced, and the working efficiency is improved; at the same time, the collision between adjacent U-shaped heat exchange tubes is avoided while avoiding the vibration of the U-shaped tube heat exchanger tube bundle, the service life is further improved, and the cost is reduced.

[0018] 2. The connecting rib of the present utility model is selected as a columnar structure or a flat steel, which can reduce the influence of the external structure of the U-shaped tube heat exchanger on the fluid flow when the fluid for heat exchange flows; the fluidity of the fluid is further ensured by increasing the flow guiding grooves, and the heat exchange efficiency is ensured.

[0019] 3. The present utility model can realize the movable connection between the connecting rib and the U-shaped tube heat exchanger tube bundle through the locking member, and the position of the reinforcing and fixing rib and the magnitude of the binding force on the U-shaped tube heat exchanger tube bundle can be adjusted according to requirements, so as to meet the actual use requirements. At the same time, after the arrangement of the reinforcing and fixing rib is completed, the two ends of the connecting rib can be fixedly connected, so as to avoid the failure of the restraint on the U-shaped tube heat exchanger tube bundle due to the unreliable connection of the locking member during use, and ensure the stable and reliable use. Description of the Drawings

[0020] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0021] Figure 2 Schematic diagram of the reinforcing and fixing rib structure of the utility model

[0022] In the figure: 1 - Tube bundle of U - tube heat exchanger; 2 - Reinforcing and fixing rib; 3 - Connecting rib; 4 - Locking piece; 5 - Flow - guiding groove Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model.

[0024] Embodiment 1

[0025] Refer to Figure 1 , this embodiment provides an anti - vibration U - tube heat exchanger, including a tube bundle 1 of the U - tube heat exchanger and a reinforcing and fixing rib 2 movably connected to the tube bundle 1 of the U - tube heat exchanger.

[0026] The tube bundle 1 of the U - tube heat exchanger is composed of the ends of multiple U - shaped heat - exchange tubes connected to a flange. The multiple U - shaped heat - exchange tubes form the tube bundle 1 of the U - tube heat exchanger, which is used for heat exchange with external fluid to achieve heat transfer.

[0027] Among them, the reinforcing and fixing rib 2 is sleeved on the outside of the tube bundle 1 of the U - tube heat exchanger, and is used to restrain each U - shaped heat - exchange tube in the tube bundle 1 of the U - tube heat exchanger, and suppress the vibration of the tube bundle 1 of the U - tube heat exchanger during its working process.

[0028] Thus, the problem of the tube bundle 1 of the U - tube heat exchanger breaking due to metal fatigue is solved from the root, ensuring its safer and more reliable use during the service process, increasing the service life, reducing the frequency of maintenance and repair, and further reducing the downtime and frequency, improving production efficiency, reducing costs, and thus meeting the actual use requirements.

[0029] Specifically, refer to Figure 2 , the reinforcing and fixing rib 2 includes a connecting rib 3 and a locking piece 4. The locking piece 4 is used to connect the two ends of the connecting rib 3 and adjust the binding force of the connecting rib 3 on the tube bundle 1 of the U - tube heat exchanger. Since the amplitude of the end of the tube bundle 1 of the U - tube heat exchanger far from the flange is larger, that is, the reinforcing and fixing rib 2 is preferably arranged at the end of the tube bundle 1 of the U - tube heat exchanger.

[0030] Therefore, the corresponding end of the tube bundle 1 of the U - tube heat exchanger is restrained by the connecting rib 3, and the vibration of each U - shaped heat - exchange tube is suppressed, so as to avoid the fracture of each tube bundle 1 of the U - tube heat exchanger due to metal fatigue near the flange position, ensuring stable and reliable use.

[0031] The locking member 4 can be selected as a snap fastener. The locking member 4 can also adjust the closeness or distance between the two ends of the connecting rib 3 by magnetic attraction or bonding, so as to adjust the caliber size of the connecting rib 3 to meet the actual use requirements.

[0032] Preferably, the locking member 4 includes a bolt and a nut. Connecting holes are provided at both ends of the connecting rib 3. The bolt passes through the connecting hole on the connecting rib 3 to connect the nut to the bolt, and the distance between the two ends of the connecting rib 3 is adjusted by the screwing position of the nut and the bolt, so as to realize the caliber of the connecting rib 3.

[0033] In order to prevent the loosening of the locking member 4 during use from increasing the caliber of the connecting rib 3, reducing the restraint on the tube bundle 1 of the U-tube heat exchanger, and preventing the connecting rib 3 from falling off the tube bundle 1 of the U-tube heat exchanger, therefore, the locking member 4 can be selected as an anti-loosening bolt, or it can also be selected to fixedly connect the two ends of the connecting rib 3 to the locking member 4 by welding after adjusting the caliber size of the connecting rib 3 through the locking member 4 and connecting it to the tube bundle 1 of the U-tube heat exchanger, so as to ensure more stable and reliable operation during use and meet the use requirements.

[0034] Preferably, a plurality of flow guiding grooves 5 are provided on the connecting rib 3, and the plurality of flow guiding grooves 5 are arranged at equal intervals around the axis of the connecting rib 3 for reducing the obstruction of the fluid outside the tube bundle 1 of the U-tube heat exchanger.

[0035] When the tube bundle 1 of the U-tube heat exchanger needs to be replaced or repaired, the strengthening and fixing rib 2 can be selected to be removed from the tube bundle 1 of the U-tube heat exchanger. In order to avoid damaging the surface of the tube bundle 1 of the U-tube heat exchanger, only the strengthening and fixing rib 2 needs to be damaged.

[0036] Further illustration, the connecting rib 3 can be selected as a columnar structure or a thin plate structure, and is bent and sleeved on the tube bundle 1 of the U-tube heat exchanger during use.

[0037] When the connecting rib 3 is a columnar structure, it can be formed by bending a steel bar to reduce the obstruction during the flow of the external fluid.

[0038] Preferably, the connecting rib 3 is a Q345 flat steel, reducing the thickness of the connecting rib 3 or increasing the roundness of the connecting rib 3, reducing the obstruction of the connecting rib 3 to the flow of the fluid outside the tube bundle 1 of the U-tube heat exchanger, so as to ensure the fluidity of the fluid during the actual use process, ensure the heat exchange efficiency, meet the actual use requirements, and will not affect the working efficiency of the anti-vibration U-tube heat exchanger.

[0039] Further illustration, the number of the strengthening and fixing ribs 2 can be selected as one or two or more.

[0040] When the number of the strengthening and fixing ribs 2 is one, the strengthening and fixing rib 2 is sleeved on one end of the tube bundle 1 of the U-tube heat exchanger away from the flange.

[0041] When the number of the reinforcing and fixing ribs 2 is two, one reinforcing and fixing rib 2 is sleeved on one end of the tube bundle 1 of the U-tube heat exchanger away from the flange, and the other reinforcing and fixing rib 2 can be sleeved between the flange and one reinforcing and fixing rib 2.

[0042] When the number of the reinforcing and fixing ribs 2 is multiple, the multiple reinforcing and fixing ribs 2 are arranged at equal intervals along the axial direction of the tube bundle 1 of the U-tube heat exchanger. The number of the reinforcing and fixing ribs 2 can be determined according to the length of the tube bundle 1 of the U-tube heat exchanger. Preferably, the number of the reinforcing and fixing ribs 2 is three.

[0043] Thus, it can ensure the technical problems caused by vibration during the use of the tube bundle of the U-tube heat exchanger. The overall structure is simple, the transformation cost is low, the effect is remarkable, and it is suitable for popularization and use.

[0044] For a U-tube heat exchanger whose tube bundle cannot be drawn out of the shell, the tube bundle can also be constrained by the reinforcing and fixing rib 2.

[0045] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0046] It should be noted that the terms used herein are only for describing specific embodiments, rather than intending to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0047] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vibration-proof U-tube heat exchanger, characterized in that, It includes a U-tube heat exchanger tube bundle (1) and a strengthening and fixing rib (2) movably connected to the U-tube heat exchanger tube bundle (1); The strengthening and fixing rib (2) includes a connecting rib (3) and a locking member (4). The connecting rib (3) is sleeved outside the U-tube heat exchanger tube bundle (1), and the locking member (4) is connected between the two ends of the connecting rib (3).

2. The anti-vibration U-tube heat exchanger according to claim 1, characterized in that The connecting rib (3) is of a columnar structure.

3. The anti-vibration U-tube heat exchanger according to claim 1, characterized in that, The connecting rib (3) is a flat steel.

4. The anti-vibration U-tube heat exchanger according to claim 1, wherein The number of the strengthening and fixing ribs (2) is multiple, and the multiple strengthening and fixing ribs (2) are arranged at equal intervals along the axis of the U-tube heat exchanger tube bundle (1).

5. The anti-vibration U-tube heat exchanger according to claim 4, wherein The number of the strengthening and fixing ribs (2) is three.

6. The anti-vibration U-tube heat exchanger according to claim 5, wherein The locking member (4) includes a bolt connected to one end of the connecting rib (3) and a nut connected to the other end of the connecting rib (3), and the bolt is matched with the nut.

7. The anti-vibration U-tube heat exchanger according to claim 5, characterized in that, The two ends of the connecting rib (3) are fixedly connected through the locking member (4).

8. The anti-vibration U-tube heat exchanger according to any one of claims 1 to 7, characterized in that, A plurality of flow guiding grooves (5) are formed in the connecting rib (3), and the plurality of flow guiding grooves (5) are arranged at equal intervals along the axis of the connecting rib (3).

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