A set of positioning elements for heat exchange tubes in a pipe-around-pipe heat exchanger

Abstract

The utility model relates to a kind of positioning element groups for the positioning element group of heat exchange tube in around pipe heat exchanger, comprising: mat strip, with first surface;Pipe hoop, the pipe hoop is annular with head-to-tail, with the inner side of circumferential extension, located the outer side of inner side surface periphery, the inner side surface defines the cavity for the heat exchange tube being set in it;The first surface is equipped with recess corresponding the position of pipe hoop, the outer side of partial pipe hoop is inserted in the recess, and the slot edge of recess is connected with the outer side of corresponding pipe hoop by welding mode between it. The utility model can better constrain the position of heat exchange tube, and also can protect heat exchange tube, avoid heat exchange tube damage.

Description

Technical Field

[0001] This utility model belongs to the field of heat exchanger technology, specifically relating to a positioning element group for heat exchange tubes in a wound-tube heat exchanger. Background Technology

[0002] Existing spiral-wound tube heat exchangers mainly consist of heat exchange tubes spirally wound from the inside out on a central tube, with each layer of heat exchange tubes positioned by support structures such as gaskets and tube clamps. For example, the structure disclosed in Chinese Utility Model Patent No. ZL201621015355.9, "A Heat Exchange Tube Gasket Structure" (Authorization Announcement No. CN205980909U), includes a gasket body. Multiple arc-shaped grooves adapted to the heat exchange tubes are spaced apart on the first side of the gasket body; a flexible first gasket is provided on the first side, and the first gasket adheres to the first side and the groove surfaces of the arc-shaped grooves.

[0003] For example, the utility model patent with patent number 201820426789.0, entitled "A Novel Pipe Clamp for Heat Exchangers" (authorization announcement number CN208108906U), discloses a novel pipe clamp for heat exchangers, which includes a body with a U-shaped recess for cooperating with a heat exchange tube. The inner wall of the U-shaped recess has a groove, which is a transverse groove distributed along the axial direction of the U-shaped recess and / or a longitudinal groove distributed along the longitudinal direction of the U-shaped recess.

[0004] Existing technologies use pipe clamps to constrain the position of heat exchange tubes, and the pipe clamps are mostly connected to the gaskets by welding, which carries the risk of damaging the heat exchange tubes during welding. At the same time, stress concentration is prone to occur at the contact point between the pipe clamp and the heat exchange tube. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a positioning element group for heat exchange tubes in a wound tube heat exchanger, which can better constrain the position of the heat exchange tubes and protect them from damage.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a positioning element group for heat exchange tubes in a wound-tube heat exchanger, comprising:

[0007] The pad strip has a first surface;

[0008] Pipe clamps;

[0009] Its features are:

[0010] The clamp is a ring with its ends connected, and has an inner side extending in a circumferential direction and an outer side located outside the inner side. The inner side defines a cavity for the heat exchange tube to pass through.

[0011] The first surface has a groove corresponding to the position of the pipe clamp, and a portion of the outer side of the pipe clamp is inserted into the groove, and the edge of the groove opening is connected to the corresponding outer side of the pipe clamp by welding.

[0012] By partially inserting the outer side of the clamp into the groove on the first surface of the gasket, and connecting the groove edge to the corresponding outer side of the clamp by welding, the heat exchange tube can be constrained. Since the welding position is relatively far from the heat exchange tube, and the annular clamp is located entirely around the heat exchange tube, it effectively protects the tube and prevents damage during welding. Furthermore, because the clamp is annular with its ends connected, the contact area between the clamp and the heat exchange tube is large, preventing stress concentration and further protecting the tube. This invention also has a simple structure, facilitating manufacturing and assembly.

[0013] Preferably, the outer surface of the clamp has a non-circular shape.

[0014] Preferably, the orientation of the first surface of the pad is defined as upward;

[0015] The bottom of the outer side of the pipe clamp is a first plane, which is inserted into the groove. The design of the first plane at the bottom of the pipe clamp facilitates its insertion into the groove and improves the stability of the structure when the two are inserted.

[0016] Preferably, the outer surface of the clamp also has vertical surfaces extending upward from both ends of the first plane, and the two vertical surfaces are connected to the groove edges of the corresponding grooves by welding. The vertical surfaces are perpendicular to the upper surface of the pad, which facilitates the welding operation and improves the structural strength after welding.

[0017] Preferably, a first rounded corner is formed at the intersection of the vertical surface and the first plane.

[0018] Furthermore, the outer surface of the clamp has a rectangular shape, and the upper ends of the two vertical surfaces are connected by a second plane.

[0019] Furthermore, a second rounded corner is formed at the intersection of the vertical surface and the second plane. The rounded corner can prevent damage to the heat exchange tube.

[0020] Preferably, the upper ends of the two vertical surfaces are connected by an upwardly arched arc surface.

[0021] In the above embodiments, preferably, the inner surface of the clamp is circular to match the shape of the outer circumferential surface of the heat exchange tube.

[0022] Furthermore, the diameter of the circle is arranged to be larger than the outer diameter of the heat exchange tube, so that there is a gap between the outer circumferential surface of the heat exchange tube passing through the cavity and the inner surface of the tube clamp.

[0023] Compared with the prior art, the advantages of this utility model are as follows: By partially inserting the outer side of the pipe clamp into the groove of the first surface of the gasket, and connecting the edge of the groove to the corresponding outer side of the pipe clamp by welding, the heat exchange tube can be constrained. Furthermore, because the welding position is relatively far from the heat exchange tube, and the annular pipe clamp is located entirely around the heat exchange tube, it can better protect the heat exchange tube and prevent damage during welding. Simultaneously, because the pipe clamp is annular with its ends connected, the contact area between the pipe clamp and the heat exchange tube is large, which can avoid stress concentration and better protect the heat exchange tube. Moreover, this utility model has a simple structure and is easy to manufacture and assemble. Attached Figure Description

[0024] Figure 1 This is a cross-sectional view of the positioning element group and the heat exchange tube in Embodiment 1 of this utility model.

[0025] Figure 2 This is a cross-sectional view of the positioning element group and the heat exchange tube assembled together in Embodiment 2 of this utility model. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0027] Example 1:

[0028] like Figure 1 As shown, this is a preferred embodiment of a positioning element assembly for heat exchange tubes in a wound-tube heat exchanger according to the present invention. The positioning element assembly includes a gasket 1 and a pipe clamp 2.

[0029] The gasket 1 has a first surface 11 and a second surface 12 extending opposite to each other along its length. The first surface 11 of the gasket 1 is oriented upwards, and the second surface 12 is oriented downwards. A groove 110 is provided on the first surface 11 at the position corresponding to the pipe clamp 2, and the bottom surface of the groove 110 is a plane.

[0030] The pipe clamp 2 is a ring with its ends connected, and has an inner side 21 extending in a circumferential direction and an outer side 22 located around the inner side 21.

[0031] The inner surface 21 has a circular outline and defines a cavity 210 through which the heat exchange tube 3 passes. In this embodiment, the diameter of the circle is arranged to be larger than the outer diameter of the heat exchange tube 3 so that there is a gap between the outer circumferential surface of the heat exchange tube 3 passing through the cavity 210 and the inner surface 21 of the clamp 2. When the gap is small, the inclination angle of the cavity 210 of the clamp 2 inserted in the groove needs to be consistent with the helical angle of the heat exchange tube. This is achieved by: 1. The inclination angle of the groove 110 is consistent with the helical angle of the heat exchange tube; 2. The cavity 210 itself has a helical angle consistent with the helical angle of the heat exchange tube. When the gap is large, the gap itself can provide helical movement space for the heat exchange tube.

[0032] The outer surface 22 has a non-circular outline. The bottom of the outer surface 22 is inserted into the groove 110, and the edge of the groove 110 is connected to the corresponding outer surface 22 of the clamp 2 by welding. In this embodiment, the outer surface 22 of the clamp 2 has a rectangular outline, and the bottom of the outer surface 22 is a first plane 221, which is inserted into the groove 110. The outer surface 22 also has vertical surfaces 223 extending upwards from both ends of the first plane 221. The two vertical surfaces 223 are connected to the edge of the corresponding groove 110 by welding, as shown in the welding position... Figure 1 As indicated by reference numeral A, the upper ends of the two vertical surfaces 223 are connected by a second plane 222. A first rounded corner 225 is formed at the intersection of the vertical surface 223 and the first plane 221. A second rounded corner 226 is formed at the intersection of the vertical surface 223 and the second plane 222 to avoid damage to the heat exchange tube.

[0033] In actual use, a pad strip 1 is provided with multiple pipe clamps 2 at intervals along the length direction, and the pad strip 1 is provided with the above-mentioned groove 110 corresponding to the position of each pipe clamp 2.

[0034] Before winding the tubes, each heat exchange tube is fitted with multiple tube clamps 2. During the winding process, each tube clamp 2 is inserted into the groove 110 of its corresponding gasket 1, and then the gasket and tube clamp are welded together.

[0035] Example 2:

[0036] like Figure 2 As shown, this is a preferred embodiment of the positioning element group for the heat exchange tube in the coiled tube heat exchanger of the present invention. This embodiment is basically the same as the first embodiment, except that in this embodiment, the upper ends of the two vertical surfaces 223 are connected by an upwardly arched arc surface 224 so that the upper contour shape of the outer side surface 22 of the tube clamp 2 is semi-circular.

[0037] In the specification and claims of this utility model, terms indicating direction, such as "upper," "lower," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A positioning element assembly for heat exchange tubes inside a wound-tube heat exchanger, comprising: A pad (1) having a first surface (11); Pipe clamp (2); Its features are: The clamp (2) is a ring with its ends connected, and has an inner side (21) extending in a circumferential direction and an outer side (22) located around the inner side (21). The inner side (21) defines a cavity (210) through which the heat exchange tube (3) passes. A groove (110) is provided on the first surface (11) at the position corresponding to the pipe clamp (2). A portion of the outer side (22) of the pipe clamp (2) is inserted into the groove (110), and the groove edge of the groove (110) is connected to the corresponding outer side (22) of the pipe clamp (2) by welding.

2. The positioning element assembly according to claim 1, characterized in that: The outer side (22) of the clamp (2) has a non-circular shape.

3. The positioning element assembly according to claim 2, characterized in that: The orientation of the first surface (11) of the pad (1) is defined as upward. The bottom of the outer side (22) of the clamp (2) is a first plane (221), which is inserted into the groove (110).

4. The positioning element assembly according to claim 3, characterized in that: The outer side (22) of the clamp (2) also has vertical surfaces (223) extending upward from both ends of the first plane (221), and the two vertical surfaces (223) are connected to the groove edge of the corresponding groove (110) by welding.

5. The positioning element assembly according to claim 4, characterized in that: A first rounded corner (225) is formed at the intersection of the vertical surface (223) and the first plane (221).

6. The positioning element assembly according to claim 4, characterized in that: The outer side (22) of the clamp (2) has a rectangular outline, and the upper ends of the two vertical surfaces (223) are connected by a second plane (222).

7. The positioning element assembly according to claim 6, characterized in that: A second rounded corner (226) is formed at the intersection of the vertical surface (223) and the second plane (222).

8. The positioning element assembly according to claim 4, characterized in that: The upper ends of the two vertical surfaces (223) are connected by an upwardly arched curved surface (224).

9. The positioning element group according to any one of claims 1 to 8, characterized in that: The inner side (21) of the clamp (2) has a circular outline.

10. The positioning element assembly according to claim 9, characterized in that: The diameter of the circle is arranged to be larger than the outer diameter of the heat exchange tube (3) so that there is a gap between the outer circumferential surface of the heat exchange tube (3) passing through the cavity (210) and the inner surface (21) of the tube clamp (2).

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