Inter-tube fixing structure for coiled tube heat exchanger

Abstract

The inter-tube fixing structure comprises an upper-layer fixing part, a lower-layer fixing part and a filler strip part connecting the upper-layer fixing part and the lower-layer fixing part, the upper-layer fixing part is used for fixing the tube distance between upper-layer wound tubes and wound tubes, and the lower-layer fixing part is used for fixing the tube distance between adjacent lower-layer wound tubes and wound tubes. The filler strip parts are arranged between the upper-layer winding pipe and the adjacent lower-layer winding pipe and used for fixing the layer distance, the effect of fixing the heat exchange pipe can be achieved by welding and connecting the lower-layer fixing parts of the upper-layer special-shaped filler strips and the upper-layer fixing parts of the lower-layer special-shaped filler strips through the two special-shaped filler strips, pipe hoops do not need to be used for welding in the middle, the welding frequency is reduced, and the welding efficiency is improved. The manufacturing progress of the heat exchanger is accelerated, the probability of welding errors can be reduced to a certain extent, the labor intensity of workers is reduced, meanwhile, pipe hoops are omitted, and the material cost is greatly saved.

Description

Technical Field

[0001] The present application belongs to the field of coiled-tube heat exchangers, and in particular, relates to an inter-tube fixing structure for coiled-tube heat exchangers. Background Art

[0002] During the winding process of the heat exchange tube of the coiled tube heat exchanger, pads need to be added between two adjacent layers to control the layer spacing, but the pads are prohibited from being directly welded to the heat exchange tubes. Therefore, it is necessary to weld the lower layer of special-shaped pads through the pipe clamp, and then weld the upper layer of pads to the pipe clamp.

[0003] Multiple welding operations greatly affect the equipment manufacturing progress, and due to the uneven level of welding personnel, if the gasket is mistakenly welded to the heat exchange tube or a weld nodule is generated, it is easy to cause leakage of the heat exchange tube and affect the heat exchange. It can be seen that the existing technology needs to be further improved and enhanced. Utility Model Content

[0004] The utility model provides an inter-tube fixing structure for a coiled tube heat exchanger, which is used to solve the problem that the number of welding pads is large during the coiling process of the heat exchange tube, thus affecting the manufacturing progress.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A tube fixing structure for a coil heat exchanger includes a special-shaped gasket strip, which includes an upper fixing portion, a lower fixing portion and a gasket strip portion connecting the two. The upper fixing portion is used to fix the tube spacing between upper coils, and the lower fixing portion is used to fix the tube spacing between adjacent lower coils. The gasket strip portion is arranged between the upper coil and the adjacent lower coil and is used to fix the layer spacing. The end of the upper fixing portion of the special-shaped gasket strip between adjacent layers is welded to the end of the lower fixing portion, so that the coil can be enclosed between the upper fixing portion and the lower fixing portion to achieve overall fixation.

[0007] The utility model is used for the tube fixing structure of the bypass heat exchanger, and the effect of fixing the heat exchange tube is achieved by using two special-shaped gaskets to weld the lower fixing part of the upper special-shaped gasket and the end of the upper fixing part of the lower special-shaped gasket. There is no need to use pipe clamps for welding in the middle, the number of welding times is reduced, the production progress of the heat exchanger is accelerated, the probability of welding errors can be reduced to a certain extent, the labor intensity of workers is reduced, and the use of pipe clamps is eliminated, which greatly saves material costs.

[0008] In a preferred implementation, the upper fixing portion is provided with a plurality of first arcuate grooves spaced apart, and the lower fixing portion is provided with a plurality of second arcuate grooves spaced apart. After the special-shaped gaskets between adjacent layers are welded and connected, the pipe is wrapped around and placed between the first arcuate grooves and the second arcuate grooves.

[0009] In a preferred implementation, the first arc-shaped groove and the second arc-shaped groove are staggered, so as to facilitate the winding of the heat exchange tubes between adjacent layers to be opposite.

[0010] In a preferred implementation, the upper fixing portion, the lower fixing portion and the cushion strip portion are integrally formed, so that the special-shaped cushion strip has higher strength and rigidity.

[0011] In a preferred implementation, the pad strip portion is a pad plate, and two long sides of the pad plate are bent upward and downward respectively to form the upper fixing portion and the lower fixing portion.

[0012] In a preferred implementation, the bending positions of the upper fixing portion and the pad strip portion transition smoothly, and the bending positions of the lower fixing portion and the pad strip portion transition smoothly.

[0013] Prevent contact and wear between the special-shaped gasket and the winding tube, which may affect the thermal efficiency and pressure drop of the heat exchanger and increase the risk of leakage.

[0014] In a preferred implementation, the cross-section of the cushion strip portion is arc-shaped, and the curvature of the arc-shaped cushion strip portion is adapted to the curvature of the layer where the winding tube is located.

[0015] The contact area between the arc-shaped gasket strip and the heat exchange tube is increased to improve the load-bearing capacity and prevent the heat exchange tube from being squeezed and deformed due to a small contact surface.

[0016] In a preferred implementation, the special-shaped gasket strip is treated by plastic dipping to make the surface smooth.

[0017] In a preferred implementation, the length of the special-shaped gasket strip is adapted to the length of the heat exchanger.

[0018] The above structure has the following beneficial effects:

[0019] 1. The welding connection of the ends of the special-shaped gaskets between the upper and lower layers can achieve the effect of fixing the heat exchange tube. There is no need to use pipe clamps for welding in the middle, which reduces the number of welding times, speeds up the production progress of the heat exchanger, reduces the probability of welding errors to a certain extent, reduces the labor intensity of workers, and eliminates the use of pipe clamps, which greatly saves material costs.

[0020] 2. The bending positions of the upper and lower fixing parts and the gasket parts are smoothly transitioned, and the cross-section of the gasket is an arc-shaped surface that matches the arc of the layer where the pipe is located, which can reduce the probability of wear between the special-shaped gasket and the heat exchange tube, and at the same time improve the bearing capacity of the special-shaped gasket. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present application and do not constitute an improper limitation on the present invention. In the drawings:

[0022] Figure 1 A schematic diagram of a three-dimensional structure of a schematic implementation of the inter-tube fixing structure of the present application is depicted;

[0023] Figure 2 A three-dimensional structural schematic diagram of an exemplary implementation method of welding and matching the ends of the special-shaped gasket strips between adjacent layers of the present application is depicted;

[0024] Figure 3 A schematic side view of a schematic implementation of the special-shaped gasket strip of the present application is depicted;

[0025] Description of labels:

[0026] 1-special-shaped pad; 10-upper fixing portion; 100-first arc-shaped groove; 11-lower fixing portion; 110-second arc-shaped groove; 12-pad portion; 2-winding tube. DETAILED DESCRIPTION

[0027] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0028] In the description of the present invention, it is necessary to understand that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the present invention, unless otherwise clearly specified and limited, a first feature being "upper" or "lower" than a second feature may be the first and second features directly contacting, or the first and second features indirectly contacting through an intermediate medium.

[0029] In the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. However, if it is indicated as a direct connection, it means that the two connected bodies are not connected through an intermediate structure, but are connected to form a whole only through a connecting structure. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0030] In the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0031] The utility model is described below in conjunction with the accompanying drawings.

[0032] The specific plans adopted are:

[0033] like Figure 1-3 As shown, the utility model provides a tube fixing structure for a coil heat exchanger, including a special-shaped gasket 1, the special-shaped gasket 1 including an upper fixing portion 10, a lower fixing portion 11 and a gasket portion 12 connecting the two, the upper fixing portion 10 is used to fix the tube distance between the upper coils 2 and the coils 2, the lower fixing portion 11 is used to fix the tube distance between adjacent lower coils 2 and the coils 2, the gasket portion 12 is arranged between the upper coil 2 and the adjacent lower coil 2, and is used to fix the layer distance, the end of the upper fixing portion 10 of the special-shaped gasket 1 between adjacent layers is welded and connected to the end of the lower fixing portion 11, so that the coil 2 can be enclosed between the upper fixing portion 10 and the lower fixing portion 11 to achieve overall fixation.

[0034] The inter-tube fixing structure of the present application is actually used. During actual use, the innermost spiral winding tube 2 is installed with the special-shaped gasket 1 of the present application after being wound on the central core tube. The tube spacing of the innermost winding tube 2 is fixed by the lower fixing part 11. The lower fixing part 11 is welded to the central core tube, and the winding tube 2 of the adjacent upper layer is wound so that the winding tube 2 is matched with the upper fixing part 10 to connect and fix the tube spacing. Then the second special-shaped gasket 1 is welded, and the lower fixing part 11 of the second special-shaped gasket 1 is welded to the end of the upper fixing part 10 of the first special-shaped gasket 1, so that the winding tube 2 is enclosed between the upper fixing part 10 and the lower fixing part 11. The winding tubes 2 of the remaining layers of the winding tubes 2 are fixed in turn. Only the ends of the upper and lower gaskets need to be welded, and no welding is required in the middle to achieve the fixing effect. The number of welding times is reduced, which speeds up the production progress of the heat exchanger. To a certain extent, the probability of welding errors can be reduced. At the same time, the use of pipe clamps is eliminated, which greatly saves material costs.

[0035] As a preferred embodiment of the present application, see Figure 1 and Figure 2 The upper fixing portion 10 is provided with a plurality of first arc grooves 100 arranged at intervals, and the lower fixing portion 11 is provided with a plurality of second arc grooves 110 arranged at intervals. The curvature of the arc groove is adapted to the curvature of the heat exchange tube. When the special-shaped gaskets 1 between adjacent layers are welded and connected, the winding tube 2 is placed between the first arc groove 100 and the second arc groove 110 at a fixed interval.

[0036] Furthermore, in order to facilitate the winding of the heat exchange tubes between adjacent layers in opposite directions, in this embodiment, the first arc-shaped groove 100 and the second arc-shaped groove 110 are staggered.

[0037] As a preferred embodiment of the present application, the upper fixing portion 10, the lower fixing portion 11 and the pad strip portion 12 are integrally formed to form an overall structure.

[0038] For details, see Figure 1 The pad strip portion 12 is a pad plate, and two long sides of the pad plate are bent upward and downward respectively to form an upper fixing portion 10 and a lower fixing portion 11.

[0039] Preferably, the length of the special-shaped gasket 1 is adapted to the length of the heat exchanger. As an alternative, for a longer heat exchanger, the entire section of the special-shaped gasket 1 may be bent, and the length of the heat exchanger can be achieved by combining and splicing multiple sections of special-shaped gaskets 1.

[0040] In order to prevent the contact wear between the special-shaped gasket strip 1 and the winding tube 2 of the present application, see Figure 3 In this embodiment, the bending positions of the upper fixing portion 10 and the pad strip portion 12 are smoothly transitioned, and the bending positions of the lower fixing portion 11 and the pad strip portion 12 are smoothly transitioned.

[0041] In addition, see Figure 3The cross-section of the pad portion 12 is arc-shaped, and the curvature of the arc-shaped pad portion 12 is adapted to the curvature of the layer where the tube 2 is located and the circular curvature formed after the tube 2 is wound on the layer, thereby increasing the contact area between the arc-shaped pad portion 12 and the heat exchange tube, improving the bearing capacity, and preventing the heat exchange tube from being squeezed and deformed due to a small contact surface.

[0042] As a preferred embodiment of the present application, the special-shaped gasket strip 1 is subjected to a plastic dipping treatment to make the surface of the special-shaped gasket strip 1 smooth, thereby further reducing the contact wear between the heat exchange tube and the special-shaped gasket strip 1 .

[0043] The parts not described in the present invention can be realized by adopting or drawing on the existing technology.

[0044] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A tube fixing structure for a coiled tube heat exchanger, characterized in that: It includes a special-shaped gasket strip, which includes an upper fixing part, a lower fixing part and a gasket strip part connecting the two. The upper fixing part is used to fix the pipe distance between the upper winding tubes, and the lower fixing part is used to fix the pipe distance between adjacent lower winding tubes. The gasket strip part is arranged between the upper winding tube and the adjacent lower winding tube for fixing the layer distance. The end of the upper fixing part of the special-shaped gasket strip between adjacent layers is welded and connected to the end of the lower fixing part, so that the winding tube can be enclosed between the upper fixing part and the lower fixing part to achieve overall fixation.

2. The tube fixing structure for a coiled-tube heat exchanger according to claim 1, characterized in that: The upper fixing part is provided with a plurality of first arc grooves arranged at intervals, and the lower fixing part is provided with a plurality of second arc grooves arranged at intervals. After the special-shaped gaskets between adjacent layers are welded and connected, they are placed around the pipe between the first arc grooves and the second arc grooves.

3. The tube fixing structure for a coiled-tube heat exchanger according to claim 2, characterized in that: The first arc-shaped groove and the second arc-shaped groove are staggered.

4. The tube fixing structure for a coiled-tube heat exchanger according to claim 1, characterized in that: The upper fixing portion, the lower fixing portion and the pad strip portion are formed in one piece.

5. The tube fixing structure for a coiled-tube heat exchanger according to claim 4, characterized in that: The pad strip portion is a pad plate, and two long sides of the pad plate are bent upward and downward respectively to form the upper layer fixing portion and the lower layer fixing portion.

6. The tube fixing structure for a coiled-tube heat exchanger according to claim 5, characterized in that: The bending positions of the upper fixing portion and the pad strip portion transition smoothly, and the bending positions of the lower fixing portion and the pad strip portion transition smoothly.

7. The tube fixing structure for a coiled-tube heat exchanger according to claim 1, characterized in that: The cross section of the cushion strip portion is arc-shaped, and the curvature of the arc-shaped cushion strip portion is adapted to the curvature of the layer where the winding pipe is located.

8. The tube fixing structure for a coiled-tube heat exchanger according to claim 1, characterized in that: The special-shaped pad strip is treated with plastic dipping to make the surface smooth.

9. The tube fixing structure for a coiled-tube heat exchanger according to claim 1, characterized in that: The length of the special-shaped gasket is adapted to the length of the heat exchanger.

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