U-shaped tube heat exchanger and tube bundle tail flexible anti-vibration structure thereof

Abstract

The utility model provides a flexible anti-vibration structure for a tube bundle tail of a U-shaped tube heat exchanger, and belongs to the technical field of U-shaped tube bundle heat exchangers. The problems that the anti-vibration effect is poor, and manufacturing and mounting are difficult are solved. The anti-vibration structure comprises a frame, a plurality of anti-vibration strips, a supporting plate and a fixing plate, the frame is arranged on the two sides of the tail portions of the U-shaped heat exchange tube bundles, the anti-vibration strips are arranged on the tail portions of the U-shaped heat exchange tube bundles in a penetrating mode, the two ends of each anti-vibration strip are connected with the frame, and the fixing plate is connected with the baffle plate. The end of the frame penetrates through the baffle plate to be connected with the fixing plate, one end of the supporting plate is connected with the baffle plate, the other end of the supporting plate is connected with the frame, and the frame has allowance for horizontal sliding. The device is mainly used for reducing U-shaped heat exchanger tube bundle tail vibration.

Description

TECHNICAL FIELD

[0001] The utility model belongs to U type pipe bundle heat exchanger technical field, especially relate to a U type pipe heat exchanger pipe bundle tail flexible anti vibration structure. BACKGROUND

[0002] In petrochemical and power generation industry, there are a large number of U type pipe heat exchanger applications in heat exchange system.

[0003] For the heat exchanger applied in heat exchange system, if the unsupported span of heat exchange pipe is too long, its natural frequency will be low, when the medium flows transversely, heat exchange pipe is prone to resonance, thereby leading to bad heat exchange pipe failure. The baffle is arranged on the straight section of the U type heat exchange pipe bundle at intervals, the baffle not only can effectively prolong the fluid flow time, but also can effectively strengthen the rigidity of the straight pipe section of the U type heat exchange pipe bundle, and can avoid vibration by reducing the unsupported span, the bending part of the U type heat exchange pipe bundle is also called the tail of the U type heat exchange pipe bundle, liquid flow can induce the vibration of the tail of the U type heat exchange pipe bundle, thereby making the collision between adjacent U type heat exchange pipe bundles or between the U type heat exchange pipe bundle and the shell, leading to the damage of the U type heat exchange pipe bundle or the shell, and for the tail of the U type heat exchange pipe bundle, in order to avoid the vibration of the tail of the U type heat exchange pipe bundle, a special pipe bundle anti vibration structure needs to be developed to reduce the unsupported span of the U section to avoid the resonance of the heat exchange pipe.

[0004] At present, the anti vibration mechanism of the tail of the U type heat exchange pipe bundle is complicated to make, and the workload is large, even if high precision is processed, error is inevitable, thereby leading to installation difficulty and affecting the anti vibration effect. INVENTION CONTENTS

[0005] Therefore, the utility model aims at providing a U type pipe heat exchanger pipe bundle tail flexible anti vibration structure to solve the problems of poor anti vibration effect and difficult production and installation.

[0006] In order to achieve the above object, the utility model adopts the following technical scheme: the anti vibration structure is arranged at the tail of the U type heat exchange pipe bundle, the anti vibration structure includes frame, anti vibration strip, support plate and fixed plate, the frame is arranged at both sides of the tail of the U type heat exchange pipe bundle, the anti vibration strip is a plurality of, the tail of the U type heat exchange pipe bundle is arranged in the plurality of anti vibration strips, the both ends of the anti vibration strip are connected with the frame, the fixed plate is connected with the baffle, the end of the frame is connected with the fixed plate after passing through the baffle and is connected with the fixed plate slidingly, one end of the support plate is connected with the baffle, and the other end is connected with the frame.

[0007] Further, the frame is connected with the fixed plate through a plurality of bolts, and the frame has a horizontal sliding allowance relative to the fixed plate after connection.

[0008] Further, the fixed plate is welded on the baffle.

[0009] Further, the support plates are a plurality of blocks, and the plurality of support plates are arranged at equal intervals in a horizontal direction.

[0010] Further, the plurality of support plates are all arc-shaped structures.

[0011] Further, horizontal waist round holes are arranged on the support plates.

[0012] Further, the frame is welded by steel plates.

[0013] A U-shaped tube heat exchanger, which comprises a flexible anti-vibration structure at the tail of a tube bundle of the U-shaped tube heat exchanger, a shell, a U-shaped tube heat exchanger bundle, a baffle and a pull rod, a plurality of U-shaped tube heat exchanger bundles are arranged at equal intervals in the shell, straight pipe sections of the plurality of U-shaped tube heat exchanger bundles are connected with the baffles, the plurality of baffles are connected with the shell respectively, and the plurality of baffles are connected through the pull rod.

[0014] Further, the baffles comprise a secondary end baffle and a terminal baffle, both ends of the secondary end baffle and the terminal baffle are connected with the shell, and the tail of the U-shaped tube heat exchanger bundle is connected with the terminal baffle.

[0015] Further, a medium inlet and outlet are arranged on the shell.

[0016] Compared with the prior art, the U-shaped tube heat exchanger has the beneficial effects that:

[0017] 1. In the anti-vibration structure, the anti-vibration strips are thin plate strips with a certain width, so that the rigid constraint effect of the anti-vibration strips on the U-shaped tube heat exchanger bundle is reduced.

[0018] 2. The anti-vibration strips and the U-shaped tube heat exchanger bundle are assembled layer by layer in a mode of one layer of heat exchange tubes and one anti-vibration strip, so that the U-shaped tube heat exchanger bundle is supported.

[0019] 3. The frame can slide horizontally relative to the fixed plate, so that the main body of the anti-vibration structure moves with the U-shaped tube heat exchanger bundle.

[0020] 4. The support plates adopt arc-shaped structures, the arc-shaped support plates can significantly reduce the up-down vibration of the frame, and can deform and expand in the horizontal direction, so that the flexibility of the anti-vibration structure is ensured.

[0021] 5. The U-shaped tube heat exchanger is convenient to manufacture and install, has good flexibility, and is convenient to adjust. BRIEF DESCRIPTION OF DRAWINGS

[0022] The drawings constituting a part of the present application are used to provide a further understanding of the present application, and the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0023] Figure 1 It is a front structure schematic view of the flexible anti-vibration structure of the tail of the tube bundle of the U-shaped tube heat exchanger.

[0024] Figure 2 It is a bottom structure schematic view of the flexible anti-vibration structure of the tail of the tube bundle of the U-shaped tube heat exchanger.

[0025] Figure 3 It is Figure 2 The structure schematic view of the middle A.

[0026] In the figure,

[0027] 1, frame; 2, anti-vibration strip; 3, support plate; 4, fixed plate; 5, bolt; 6, shell; 7, U-shaped heat exchange tube bundle; 8, secondary end baffle; 9, pull rod; 10, end baffle; 11, medium inlet and outlet. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict, and the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0029] See Figures 1-3 To achieve the above-mentioned purpose, the present application adopts the following technical solutions: a flexible anti-vibration structure of the tail of the tube bundle of a U-shaped tube heat exchanger, the anti-vibration structure is arranged at the tail of the U-shaped heat exchange tube bundle 7, the anti-vibration structure comprises a frame 1, an anti-vibration strip 2, a support plate 3 and a fixed plate 4, the frame 1 is arranged at both sides of the tail of a plurality of U-shaped heat exchange tube bundles 7, the frame 1 is used for supporting and fixing the plurality of U-shaped heat exchange tube bundles 7 and the anti-vibration structure, the anti-vibration strip 2 is a plurality of, the tail of the plurality of U-shaped heat exchange tube bundles 7 is arranged with the plurality of anti-vibration strips 2, the two ends of the anti-vibration strip 2 are connected with the frame 1, the anti-vibration strip 2 adopts a thin plate strip with a certain width, which is used for absorbing the vibration energy of the tail of the U-shaped heat exchange tube bundle 7, the fixed plate 4 is connected with the baffle, the end of the frame 1 is connected with the fixed plate 4 through the baffle, the frame 1 and the fixed plate 4 play a supporting role for the tail of the U-shaped heat exchange tube bundle 7, one end of the support plate 3 is connected with the baffle, and the other end is connected with the frame 1, so as to further strengthen the stability of the whole structure.

[0030] The anti-vibration strip 2 is arranged between the tails of the U-shaped heat exchange tube bundles 7, which reduces the damage caused by vibration and expansion, and the frame 1 can slide relatively in the horizontal direction to adapt to the thermal expansion and vibration of the tail of the U-shaped heat exchange tube bundle 7, thereby improving the reliability and service life of the equipment.

[0031] The frame 1 is connected with the fixed plate 4 by several bolts 5, and the frame 1 has a horizontal sliding allowance relative to the fixed plate 4 after connection. The several bolts 5 serve to connect the frame 1 and the fixed plate 4, but the frame 1 and the fixed plate 4 are not fixed by the several bolts 5. The connection hole can be a long strip hole structure, and the frame 1 can still displace in the horizontal direction after connection, which is used to compensate the thermal expansion and vibration of the tail of the U-shaped heat exchange tube bundle 7.

[0032] The fixed plate 4 is welded on the baffle plate, which further enhances the stability of the entire anti-vibration structure.

[0033] The tail of the frame 1 is provided with several support plates 3, and the several support plates 3 are arranged at equal intervals in the horizontal direction.

[0034] The several support plates 3 are all arc-shaped structures, which can provide better support force distribution.

[0035] The support plate 3 is provided with a horizontal waist hole, and the frame 1 slides horizontally relative to the fixed plate 4. By providing the horizontal waist hole, the frame 1 is allowed to slide horizontally on the fixed plate 4, but cannot move vertically, thereby allowing the frame 1 to move with the thermal expansion or vibration of the U-shaped heat exchange tube bundle 7.

[0036] The frame 1 is welded by steel plates, which ensures the rigidity and stability of the structure.

[0037] A U-shaped tube heat exchanger, comprising a tube bundle tail flexible anti-vibration structure of a U-shaped tube heat exchanger, an outer shell 6, a U-shaped heat exchange tube bundle 7, a baffle plate and a pull rod 9. The outer shell 6 is provided with several U-shaped heat exchange tube bundles 7 at equal intervals. The straight pipe section of the several U-shaped heat exchange tube bundles 7 is connected with the baffle plate. The several baffle plates are connected with the outer shell 6 respectively. The several baffle plates are connected by the pull rod 9. The baffle plate is used to guide the flow of fluid in the heat exchanger, increase the contact area of fluid and the U-shaped heat exchange tube bundle 7, and thus improve the heat exchange efficiency.

[0038] The baffle plate comprises a secondary end baffle plate 8 and a terminal baffle plate 10. The secondary end baffle plate 8 and the terminal baffle plate 10 are connected with the outer shell 6 at both ends. The tail of the U-shaped heat exchange tube bundle 7 is connected with the terminal baffle plate 10.

[0039] The outer shell 6 is provided with a medium inlet and outlet 11. The medium inlet and outlet 11 is used to connect the external heat exchange medium, so that the fluid can enter and leave the heat exchanger.

[0040] The above disclosed embodiments of the utility model are only used for helping the utility model to be described. The embodiments do not describe all the details, and also do not limit the utility model to be the specific implementation mode. According to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments, in order to better explain the principle and practical application of the utility model, so that the person skilled in the art can well understand and utilize the utility model.

Claims

1. A flexible anti-vibration structure of a tube bundle tail of a U-tube heat exchanger, characterized in that: The anti-vibration structure is arranged at the tail of the U-shaped heat exchange tube bundle (7), and comprises a frame (1), an anti-vibration strip (2), a support plate (3) and a fixed plate (4). The frame (1) is arranged at both sides of the tail of the U-shaped heat exchange tube bundle (7). The anti-vibration strip (2) is arranged at the tail of the U-shaped heat exchange tube bundle (7). The anti-vibration strip (2) is connected with the frame (1) at both ends. The fixed plate (4) is connected with the baffle. The frame (1) is connected with the fixed plate (4) through the baffle. The support plate (3) is connected with the baffle at one end and with the frame (1) at the other end.

2. The tail flexible anti-vibration structure of the tube bundle of the U-shaped tube heat exchanger according to claim 1, characterized in that: The frame (1) is connected with the fixed plate (4) through a plurality of bolts (5). After being connected, the frame (1) has a horizontal sliding allowance relative to the fixed plate (4).

3. The tail flexible anti-vibration structure of the tube bundle of the U-shaped tube heat exchanger according to claim 1, characterized in that: The fixed plate (4) is welded on the baffle.

4. The tail flexible anti-vibration structure of the tube bundle of the U-shaped tube heat exchanger according to claim 1, characterized in that: The support plate (3) is arranged at equal intervals along the horizontal direction.

5. The tail flexible anti-vibration structure of the tube bundle of the U-shaped tube heat exchanger according to claim 4, characterized in that: The support plate (3) is in an arc shape.

6. The tail flexible anti-vibration structure of the tube bundle of the U-shaped tube heat exchanger according to claim 1, characterized in that: A horizontal waist hole is arranged on the support plate (3).

7. The tail flexible anti-vibration structure of a tube bundle of a U-tube heat exchanger according to claim 1, characterized in that: The frame (1) is welded by a steel plate.

8. A U-tube heat exchanger, characterized by It comprises the flexible anti-vibration structure of the tail of the U-shaped tube heat exchanger, a shell (6), a U-shaped heat exchange tube bundle (7), a baffle and a pull rod (9). The shell (6) is arranged with a plurality of U-shaped heat exchange tube bundles (7) at equal intervals. The straight pipe section of the U-shaped heat exchange tube bundle (7) is connected with the baffle. The baffles are connected with the shell (6) through the pull rod (9).

9. A U-tube heat exchanger according to claim 8, characterised in that: The baffle comprises a secondary end baffle (8) and a terminal baffle (10). The secondary end baffle (8) and the terminal baffle (10) are connected with the shell (6) at both ends. The tail of the U-shaped heat exchange tube bundle (7) is connected with the terminal baffle (10).

10. A U-tube heat exchanger according to claim 8, characterized in that: A medium inlet and outlet (11) is arranged on the shell (6).

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