Tube bundle limiting structure of kettle type heat exchanger

Abstract

The utility model relates to the technical field of heat exchanger safety, and provides a kettle type heat exchanger tube bundle limiting structure which comprises a shell and a tube bundle, the tube bundle is placed at the inner bottom of the shell, a plurality of supporting plates are arranged outside the tube bundle in a sleeved mode, and connecting rods parallel to the tube bundle are connected between the adjacent supporting plates. And a limiting rod is connected to the connecting rod in a sliding and abutting mode, one end of the limiting rod is hinged to the inner wall of the shell, and the other end of the limiting rod is rotationally connected or clamped with the connecting rod in a matched mode, and through arrangement of the supporting plate, the connecting rod and the limiting rod, the position of the tube bundle is effectively limited and fixed, and shaking or displacement of the tube bundle in the shell is avoided; and the stability and the reliability of the structure are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchanger safety, in particular to a tube bundle limiting structure of a kettle type heat exchanger. Background Art

[0002] Kettle heat exchanger is a commonly used heat exchange equipment, which is widely used in the petroleum, chemical, electric power and other industries. The working principle is to achieve heat exchange effect by transferring heat between the hot medium flowing in the shell and the cooling medium flowing in the tube bundle. Kettle heat exchanger usually consists of two parts: shell and tube bundle. The shell diameter of this type of heat exchanger is often much larger than the outer diameter of the heat exchange tube bundle. After the tube bundle is inserted into the shell, the entire tube bundle is placed on the support structure at the bottom of the shell. If there is no infinite structure above the tube bundle, the entire tube bundle is in a metastable state.

[0003] However, existing kettle-type heat exchangers usually lack position limits on the heat exchange tube bundle. Violent evaporation occurs outside the heat exchange tube inside the shell, and vibration occurs during transportation or lifting, which can easily cause deformation or damage to the tube bundle. This will not only affect the life of the tube bundle itself, but may also cause the strength of the weld at the connection between the tube bundle and the shell to fail, posing a safety hazard. Utility Model Content

[0004] The utility model aims to provide a tube bundle limiting structure for a kettle type heat exchanger, so as to solve the above technical problems and improve the stability and reliability of the structure.

[0005] The embodiment of the utility model is realized through the following technical scheme: a kettle type heat exchanger tube bundle limiting structure, including a shell and a tube bundle, the tube bundle is placed at the bottom of the shell, a plurality of support plates are arranged outside the tube bundle, connecting rods arranged parallel to the tube bundle are connected between adjacent support plates, the connecting rod is slidably and tightly connected with a limiting rod, one end of the limiting rod is hinged to the inner wall of the shell, and the other end of the limiting rod is rotatably connected or matched with the connecting rod.

[0006] Furthermore, the limiting rod includes a first support rod, a connecting sleeve, a second support rod and a sliding connecting piece, one end of the first support rod is hinged to the inner wall of the shell, the other end of the first support rod is threadedly connected to one end of the connecting sleeve, one end of the second support rod is threadedly connected to the other end of the connecting sleeve, the other end of the second support rod is fixed to the sliding connecting piece, and the sliding connecting piece is slidably connected to the connecting rod.

[0007] Preferably, one end of the connecting sleeve is a clockwise internal thread, and the other end of the connecting sleeve is a counterclockwise internal thread.

[0008] Preferably, the connecting sleeve is prismatic.

[0009] Furthermore, the limiting rods are vertically symmetrically distributed on the circumferential surface of the shell.

[0010] Furthermore, a pad is provided on the inner wall of the shell between the limit rod and the hinged portion of the shell.

[0011] Furthermore, an operating hole is provided on the shell, through which the limiting rod is fastened to press against the connecting rod.

[0012] The utility model has at least the following advantages and beneficial effects: through the arrangement of the support plate, the connecting rod and the limiting rod, the position of the tube bundle is effectively limited and fixed, the shaking or displacement of the tube bundle in the shell is avoided, and the stability and reliability of the structure are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 A schematic structural diagram of a tube bundle limiting structure of a kettle type heat exchanger provided in Example 1 of the utility model;

[0015] Figure 2 A side view of a tube bundle limiting structure of a kettle type heat exchanger provided in Example 1 of the utility model;

[0016] Figure 3 A schematic diagram of the partial structure of a tube bundle limiting structure of a kettle type heat exchanger provided in the second embodiment of the utility model;

[0017] Icon: 1-shell, 10-tube bundle support, 2-tube bundle, 3-support plate, 4-connecting rod, 5-limiting rod, 51-first support rod, 52-connecting sleeve, 53-second support rod, 54-sliding connector, 55-locking nut, 6-gasket, 7-operating hole. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Embodiment 1

[0021] like Figure 1 , 2 As shown, in this embodiment, a tube bundle limiting structure of a kettle heat exchanger is mainly disclosed, including a shell 1 and a tube bundle 2. The tube bundle 2 is placed at the bottom of the shell 1. A plurality of support plates 3 are arranged outside the tube bundle 2. Connecting rods 4 arranged parallel to the tube bundle 2 are connected between adjacent support plates 3. A limiting rod 5 is slidably and tightly connected to the connecting rod 4. One end of the limiting rod 5 is hinged to the inner wall of the shell 1, and the other end of the limiting rod 5 is rotatably connected to the connecting rod 4. It should be noted that in the prior art, the tube bundle 2 of the kettle heat exchanger is usually composed of a tube sheet at the end and a plurality of neatly arranged heat exchange tubes. The inner bottom plate of the shell 1 is usually provided with a tube bundle support 10, and the heat exchange tubes fall on the tube bundle support only by gravity. The support plate 3 may be a circular plate with a plurality of holes for passing the heat exchange tubes. The adjacent support plates 3 are fixed by connecting rods 4, and the support plates 3 are limited and fixed by limiting rods 5, so as to effectively avoid the shaking or displacement of the tube bundle 2 on the vertical circumferential surface in the shell 1, thereby improving the stability and reliability of the equipment. The setting of the connecting rod 4 should ensure that there is no interference with the tube bundle 2. The limiting rod 5 can be arranged at the upper part of the inner side of the shell 1 to apply a supporting force to the support plate 3, or the limiting rod 5 can be arranged at the lower part of the inner side of the shell 1 to apply a pulling force to the support plate 3 to achieve the limited fixation of the support plate 3.

[0022] Further, in a specific implementation, the above-mentioned limit rod 5 provided in the embodiment of the utility model includes a first support rod 51, a connecting sleeve 52, a second support rod 53 and a sliding connection member 54, one end of the first support rod 51 is hinged to the inner wall of the shell 1, the other end of the first support rod 51 is threadedly connected to one end of the connecting sleeve 52, one end of the second support rod 53 is threadedly connected to the other end of the connecting sleeve 52, the other end of the second support rod 53 is fixed to the sliding connection member 54, and the sliding connection member 54 is slidably connected to the connecting rod 4; specifically, the sliding connection member 54 can be sleeved on the connecting rod 4 by a sliding sleeve, and the first support rod 51 and the second support rod 53 are respectively connected to the inner wall of the shell 1. The threaded cooperation of the connecting sleeve 52 facilitates fine-tuning and fixing of the position, realizes fixing of the support plate 3, and ensures that the tube bundle 2 is in the correct position; specifically, one end of the connecting sleeve 52 is a clockwise internal thread, and the other end of the connecting sleeve 52 is a counterclockwise internal thread, which effectively realizes a self-locking effect. When the threads at both ends are connected, since one is a clockwise thread and the other is a counterclockwise thread, mutually offsetting forces will be generated, making the connection more secure and not easy to loosen, thereby improving the stability of the connection; the connecting sleeve 52 is in the shape of a prism, for example, the connecting sleeve 52 is processed into a regular hexagonal prism, and can be rotated and tightened with a tool such as a wrench, which is convenient for tightening operations.

[0023] Furthermore, in specific implementation, the limiting rods 5 provided in the embodiment of the utility model are vertically symmetrically distributed on the circumferential surface of the shell 1, so that the tube bundle 2 can be stressed more evenly, reducing the risk of deformation or rupture caused by uneven stress.

[0024] Furthermore, in a specific implementation, a pad 6 is provided on the inner wall of the shell 1 provided in the embodiment of the utility model between the limit rod 5 and the hinge of the shell 1 to improve the stress condition of the shell 1 .

[0025] Furthermore, in a specific implementation, an operating hole 7 is provided on the shell 1 provided in the embodiment of the utility model, and the operating hole 7 is used to tighten the limit rod 5 against the connecting rod 4. It should be noted that the operating hole 7 should be provided near the hinge of the limit rod 5 to facilitate reaching in to tighten the connecting sleeve 52.

[0026] Embodiment 2

[0027] like Figure 3As shown, in this embodiment, the main structure is exactly the same as that of the first embodiment, and the difference is that one end of the limit rod 5 is hinged to the inner wall of the shell 1, and the other end of the limit rod 5 is engaged with the connecting rod 4. Specifically, the sliding connector 54 can be a block with a slot. Taking into account the assembly error, a large assembly gap margin needs to be reserved between the sliding connector 54 and the connecting rod 4 to prevent incomplete alignment after assembly, resulting in a large bending moment, or even inability to assemble. At the same time, the limit rod 5 can only be installed on the upper part of the inner side of the shell 1 to apply a supporting force to the support plate 3 to achieve limited fixation of the support plate 3.

[0028] In addition, locking nuts may be installed at the connection ends of the first support rod and the second support rod and the connecting sleeve to prevent the limiting structure from loosening during the service of the equipment, so as to improve the reliability of the equipment.

[0029] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tube bundle limiting structure for a kettle heat exchanger, comprising a shell (1) and a tube bundle (2), wherein the tube bundle (2) is placed at the bottom of the shell (1), characterized in that: The outer sleeve of the tube bundle (2) is provided with a plurality of support plates (3), and connecting rods (4) arranged parallel to the tube bundle (2) are connected between adjacent support plates (3). A limiting rod (5) is connected to the connecting rod (4), and one end of the limiting rod (5) is hinged to the inner wall of the shell (1), and the other end of the limiting rod (5) is rotatably connected or engaged with the connecting rod (4).

2. A kettle type heat exchanger tube bundle limiting structure according to claim 1, characterized in that: The limiting rod (5) comprises a first support rod (51), a connecting sleeve (52), a second support rod (53) and a sliding connection piece (54); one end of the first support rod (51) is hinged to the inner wall of the shell (1); the other end of the first support rod (51) is threadedly connected to one end of the connecting sleeve (52); one end of the second support rod (53) is threadedly connected to the other end of the connecting sleeve (52); the other end of the second support rod (53) is fixed to the sliding connection piece (54); and the sliding connection piece (54) is slidably connected to the connecting rod (4).

3. A tube bundle limiting structure for a kettle type heat exchanger according to claim 2, characterized in that: One end of the connecting sleeve (52) is a clockwise internal thread, and the other end of the connecting sleeve (52) is a counterclockwise internal thread.

4. A tube bundle limiting structure for a kettle type heat exchanger according to claim 2, characterized in that: The connecting sleeve (52) is in the shape of a prism.

5. The tube bundle limiting structure of a kettle type heat exchanger according to claim 1, characterized in that: The limiting rods (5) are distributed vertically symmetrically on the circumferential surface of the shell (1).

6. The tube bundle limiting structure of a kettle type heat exchanger according to claim 1, characterized in that: A pad (6) is provided on the inner wall of the shell (1) between the hinged portion of the limiting rod (5) and the shell (1).

7. The tube bundle limiting structure of a kettle type heat exchanger according to claim 1, characterized in that: An operating hole (7) is provided on the housing (1), and a rod passing through the operating hole (7) is used to tighten the limiting rod (5) against the connecting rod (4).

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