A movable U-shaped tube tail support assembly

Abstract

This utility model relates to a movable U-shaped tube tail support assembly, comprising: a vertical support plate, a first tail support plate, a second tail support plate, a covering, a first movable connecting mechanism, and a second movable connecting mechanism. The first and second tail support plates have the same structure, both being formed by splicing and spot welding several clips. Each clip has several evenly distributed semi-circular holes. The outer free ends of both the first and second tail support plates are welded to the covering. The first movable connecting mechanism includes: a first positioning tube welded to the vertical support plate and a first round steel piece welded to one of the free ends of the covering. The second movable connecting mechanism includes: a second positioning tube welded to the vertical support plate and a second round steel piece welded to the other free end of the covering. This allows the bent portion of the U-shaped tube to freely expand and contract to provide thermal compensation when subjected to thermal stress due to temperature difference.

Description

[Technical Field]

[0001] This utility model relates to the field of heat exchangers, and in particular to a movable U-shaped tube tail support assembly. [Background Technology]

[0002] A heat exchanger is a device that transfers some of the heat from a hot fluid to a cold fluid; it is also called a heat exchanger. Heat exchangers play an important role in chemical, petroleum, power, food, and many other industrial production processes. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators, and reboilers, and are widely used.

[0003] U-tube heat exchangers are a type of heat exchanger. A U-tube heat exchanger has only one tube sheet, and both ends of the tubes are fixed to the same tube sheet. For U-tube heat exchangers, when the unsupported span of the heat exchange tubes exceeds the maximum unsupported span of the straight tube section specified in GB / T151-2014, a support plate should be installed. If the structural dimensions of the support plate are larger than the maximum unsupported span specified in the standard, a tail support device should be added to the bend section. Please refer to the prior art (Chinese Patent ZL202221656093.X), which discloses a fixed U-shaped tube tail support structure for supporting the tails of multiple stacked U-shaped heat exchange tubes. Each U-shaped heat exchange tube has a corresponding sleeve fitted at its tail, and the sleeves are welded and fixed to each other. The structure also includes a support plate mounted on a fixed object, wherein the sleeves adjacent to the support plate are welded and fixed to the support plate. The structure also includes a binding steel strip, which wraps and binds each sleeve and is welded and fixed to the adjacent sleeves. The two free ends of the binding steel strip are welded and fixed to the support plate. The defects of this type of fixed U-tube tail support structure are as follows: 1. During manufacturing, the sleeve is placed on the heat exchange tube before the heat exchange tube is bent. Therefore, workers cannot observe whether there are any defects in the part of the heat exchange tube covered by the sleeve after bending. 2. During operation, the heat exchange tube will generate thermal stress due to the temperature difference between the tube and shell. The existing fixed U-tube tail support structure provides support at the tail bend, but it also causes the tail bend to be firmly fixed and unable to expand and contract freely to provide thermal compensation. In other words, for heat exchangers with this type of fixed U-tube tail support structure, only the straight section of the U-shaped heat exchange tube can expand and contract freely to provide thermal compensation. The bend section cannot expand and contract freely to provide thermal compensation because it is firmly fixed by the tail support structure.

[0004] Therefore, we need to propose a movable U-tube tail support assembly to address the above-mentioned technical problems. This assembly can provide better support for the tail bend of the U-shaped heat exchange tube, and when thermal compensation is required, not only can the straight pipe section expand and contract freely, but the bend section can also expand and contract freely. [Utility Model Content]

[0005] To address the aforementioned problems, the purpose of this utility model is to provide a movable U-shaped pipe tail support assembly that allows for free extension and retraction of the bent pipe section.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a movable U-shaped tube tail support assembly, comprising: a vertical support plate, a first tail support plate, a second tail support plate, a covering, a first movable connecting mechanism, and a second movable connecting mechanism. The first tail support plate and the second tail support plate have the same structure, both being formed by splicing and spot welding several clips. Each clip has several evenly distributed semi-circular holes. The heat exchange tube is held in the circular hole formed after splicing two adjacent clips. The outer free ends of the first tail support plate and the second tail support plate are welded to the covering. The first movable connecting mechanism comprises: a first positioning tube welded to the vertical support plate and a first round steel piece welded to one of the free ends of the covering. The first round steel piece is housed in the first positioning tube and can move axially relative to the first positioning tube. The second movable connecting mechanism comprises: a second positioning tube welded to the vertical support plate and a second round steel piece welded to the other free end of the covering. The second round steel piece is housed in the second positioning tube and can move axially relative to the second positioning tube.

[0007] Preferably, the movable U-shaped tube tail support assembly of this utility model is further configured such that the first tail support plate and the second tail support plate are set at a 90° angle.

[0008] Preferably, the movable U-shaped tube tail support assembly of this utility model is further configured such that the first movable connecting mechanism and the second movable connecting mechanism are symmetrically arranged.

[0009] Preferably, the movable U-shaped tube tail support assembly of this utility model is further configured such that: the vertical support plate, the first tail support plate, the second tail support plate, the covering, the first movable connecting mechanism and the second movable connecting mechanism are all made of stainless steel.

[0010] Preferably, the movable U-shaped tube tail support assembly of this utility model is further configured such that the covering part is polygonal.

[0011] Preferably, the movable U-shaped tube tail support assembly of this utility model is further configured such that the locking strip is cut from a steel plate after drilling.

[0012] Preferably, the movable U-shaped tube tail support assembly of this utility model is further configured such that: the vertical support plate is provided with a plurality of tube holes for the heat exchange tube to pass through.

[0013] Compared with the prior art, the present utility model has the following beneficial effects: compared with the fixed U-shaped tube tail support assembly in the prior art, the movable U-shaped tube tail support assembly in the present utility model is additionally provided with a first movable connection mechanism and a second movable connection mechanism, so that the bent tube part of the U-shaped tube can freely expand and contract to provide thermal compensation when subjected to temperature difference thermal stress, that is, when the bent tube part freely expands and contracts, the first round steel member of the first movable connection mechanism moves axially relative to the first positioning tube, and the second round steel member of the second movable connection mechanism moves axially relative to the second positioning tube. DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a structural schematic diagram of the movable U-shaped tube tail support assembly in the present utility model.

[0015] Figure 2 is a structural schematic diagram of the first tail support plate in the present utility model.

[0016] Figure 3 is Figure 2 a partial enlarged view of part A in.

[0017] Figures 1 to 3 in the figure: 1. Vertical support plate, 2. First tail support plate, 20. Clamping strip, 200. Semicircular hole, 201. Circular hole, 3. Second tail support plate, 4. Cladding member, 5. First movable connection mechanism, 50. First positioning tube, 51. First round steel member, 6. Second movable connection mechanism, 60. Second positioning tube, 61. Second round steel member. SPECIFIC EMBODIMENTS

[0018] The movable U-shaped heat exchange tube tail support assembly according to the present utility model will be further described in detail below through specific embodiments.

[0019] Reference Figures 1 to 3As shown, a movable U-shaped tube tail support assembly includes: a vertical support plate 1, a first tail support plate 2, a second tail support plate 3, a covering 4, a first movable connecting mechanism 5, and a second movable connecting mechanism 6. The vertical support plate 1 has several tube holes for heat exchange tubes to pass through. In this embodiment, the first tail support plate 2 and the second tail support plate 3 are arranged at a 90° angle, and the covering 4 is polygonal. The first tail support plate 2 is formed by splicing and spot welding several clamping strips 20. The clamping strips 20 are cut from steel plates after drilling holes. Each clamping strip 20 has several evenly distributed semi-circular holes 200. The heat exchange tube is clamped in the circular hole 201 formed by splicing two adjacent clamping strips 20. The structure of the second tail support plate 3 is the same as that of the first tail support plate 2. The free ends of the first tail support plate 2 and the second tail support plate 3 are welded to the covering 4. The first movable connecting mechanism 5 includes: and The first positioning tube 50 is welded to the vertical support plate 1, and the first round steel member 51 is welded to one of the free ends of the covering member 4. The first round steel member 51 is housed within the first positioning tube 50 and can move axially relative to the first positioning tube 50. The second movable connecting mechanism 6 includes: a second positioning tube 60 welded to the vertical support plate 1, and a second round steel member 61 welded to the other free end of the covering member 4. The second round steel member 61 is housed within the second positioning tube 60 and can move axially relative to the second positioning tube 60. In this embodiment, the first movable connecting mechanism 5 and the second movable connecting mechanism 6 are symmetrically arranged. The vertical support plate 1, the first tail support plate 2, the second tail support plate 3, the covering member 4, the first movable connecting mechanism 5, and the second movable connecting mechanism 6 are all made of stainless steel, thus having good corrosion resistance.

[0020] The installation method of the movable U-shaped tube tail support assembly in this utility model is as follows: the U-shaped heat exchange tube is installed from the inside out in the manner of one layer of heat exchange tube and one layer of clamp strip. The joint of every two adjacent clamp strips is spot welded. After all the clamp strips are installed, the outer free ends of the first tail support plate and the second tail support plate are welded to the covering.

[0021] In summary, compared with the fixed U-shaped tube tail support assembly in the prior art, the movable U-shaped tube tail support assembly of this utility model adds a first movable connecting mechanism 5 and a second movable connecting mechanism 6, so that the bent part of the U-shaped tube can freely expand and contract to provide thermal compensation when subjected to thermal stress due to temperature difference. That is, when the bent part freely expands and contracts, the first round steel member 51 of the first movable connecting mechanism 5 moves axially relative to the first positioning tube 50, and the second round steel member 61 of the second movable connecting mechanism 6 moves axially relative to the second positioning tube 60.

[0022] The above embodiments are merely illustrative of the principles and effects of this utility model, as well as some of its applications, and are not intended to limit this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A movable U-tube tail support assembly characterized by: The system includes: a vertical support plate, a first tail support plate, a second tail support plate, a covering, a first movable connecting mechanism, and a second movable connecting mechanism. The first and second tail support plates have the same structure, both formed by splicing and spot welding several clips. Each clip has several evenly distributed semi-circular holes. The heat exchange tube is held in the circular hole formed by splicing two adjacent clips. The outer free ends of the first and second tail support plates are welded to the covering. The first movable connecting mechanism includes: a first positioning tube welded to the vertical support plate and a first round steel piece welded to one of the free ends of the covering. The first round steel piece is housed in the first positioning tube and can move axially relative to the first positioning tube. The second movable connecting mechanism includes: a second positioning tube welded to the vertical support plate and a second round steel piece welded to the other free end of the covering. The second round steel piece is housed in the second positioning tube and can move axially relative to the second positioning tube.

2. A movable U-tube tail piece support assembly as claimed in claim 1, characterized in that: The first tail support plate and the second tail support plate are set at a 90° angle.

3. A floating U-tail support assembly as in claim 1, wherein: The first movable connecting mechanism and the second movable connecting mechanism are arranged symmetrically.

4. A floating U-tail support assembly as in claim 1, wherein: The vertical support plate, the first tail support plate, the second tail support plate, the covering, the first movable connecting mechanism, and the second movable connecting mechanism are all made of stainless steel.

5. A floating U-tail support assembly as in claim 1, wherein: The covering is polygonal in shape.

6. A floating U-tail support assembly as claimed in claim 1, wherein: The card strip is made by drilling holes in a steel plate and then cutting it.

7. The movable U-shaped tube tail support assembly as described in claim 1, characterized in that: The vertical support plate has several holes for heat exchange tubes to pass through.

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