Pipe hoop for heat exchange pipe

Abstract

A pipe hoop for a heat exchange pipe comprises a U-shaped pipe hoop body capable of elastically deforming and provided with a concave cavity with an opening so that a first heat exchange pipe can be inserted into the concave cavity through the opening, and the opening faces downwards; a first inner arc face, a second inner arc face and a third inner arc face are sequentially arranged on the upper portion of the inner circumferential face of the concave cavity in the circumferential direction, the second inner arc face faces the opening and is used for being matched with the outer circumferential wall of the first heat exchange tube, and the first inner arc face and the third inner arc face are both concave outwards and are used for being matched with the outer circumferential wall of the second heat exchange tube. A first protruding part which protrudes inwards and is used for being opposite to the peripheral wall of the first heat exchange tube is formed at the joint of the first inner arc face and the second inner arc face, and a second protruding part which protrudes inwards and is used for being opposite to the peripheral wall of the first heat exchange tube is formed at the joint of the third inner arc face and the second inner arc face. Compared with the prior art, the heat exchange tube can be prevented from being locked by the tube hoop after being expanded due to working condition fluctuation.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchangers, and in particular relates to a pipe clamp used for a heat exchange pipe. Background Art

[0002] The existing wound tube heat exchanger mainly includes heat exchange tubes spirally wound on the central tube from the inside to the outside, and each layer of heat exchange tubes is positioned by support structures such as gaskets and pipe clamps. For example, the structure disclosed in the utility model patent "A heat exchange tube gasket structure" with patent number ZL201621015355.9 (authorization announcement number CN205980909U) includes a gasket body, and a plurality of arc-shaped grooves adapted to the heat exchange tubes are arranged on the first side of the gasket body at intervals; a flexible first gasket is arranged on the first side, and the first gasket is attached to the first side and the groove surface of the arc-shaped groove.

[0003] Another example is the utility model patent "Support structure of heat exchange tube" with patent number 202122904581.X (authorization announcement number CN216385246U), which includes: a gasket and a pipe clamp, the gasket has a first surface; the pipe clamp has a recess for cooperating with the outer peripheral wall of the heat exchange tube, the recess is opposite to the first surface of the gasket, and the pipe clamp also has a first support leg and a second support leg located on both sides of the recess, and the pipe clamp is constrained on the first surface of the gasket by the first and second support legs; the first support leg and the second support leg are respectively clamped on the gasket by the clamping portion and the clamping groove.

[0004] The prior art uses pipe clamps and gaskets to restrain the heat exchange tubes. However, if the heat exchange tubes expand due to operating fluctuations (such as temperature changes, operating pressure changes, and operating load changes), the pipe clamps are likely to lock the heat exchange tubes. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a pipe clamp for a heat exchange pipe in view of the current status of the prior art, so as to prevent the heat exchange pipe from being locked by the pipe clamp after expanding due to fluctuations in working conditions.

[0006] The technical solution adopted by the utility model to solve the above technical problems is: a pipe clamp for a heat exchange pipe, comprising:

[0007] The U-shaped elastically deformable pipe clamp body has a concave cavity with an opening, so that the first heat exchange pipe can be inserted into the concave cavity through the opening, and the direction of the opening is downward;

[0008] Features:

[0009] The upper part of the inner circumferential surface of the concave cavity has a first inner arc surface, a second inner arc surface and a third inner arc surface arranged in sequence along the circumferential direction, the second inner arc surface faces the opening, and is used to cooperate with the outer circumferential wall of the first heat exchange tube, the first inner arc surface and the third inner arc surface are both concave outward, and the intersection of the first inner arc surface and the second inner arc surface forms a first convex portion that protrudes inward and is used to be opposite to the outer circumferential wall of the first heat exchange tube, and the intersection of the third inner arc surface and the second inner arc surface forms a second convex portion that protrudes inward and is used to be opposite to the outer circumferential wall of the first heat exchange tube.

[0010] In this way, when the heat exchange tube expands due to fluctuations in operating conditions, the first inner arc surface and the third inner arc surface can produce elastic deformation under the action of the heat exchange tube, providing expansion space for the heat exchange tube to avoid the heat exchange tube being locked by the pipe clamp after expansion. The second inner arc surface of the pipe clamp body cooperates with the outer peripheral wall of the heat exchange tube to better constrain the heat exchange tube.

[0011] Preferably, the axis extending up and down and passing through the center of the circle corresponding to the second inner arc surface is referred to as the first axis, and the first inner arc surface and the third inner arc surface are symmetrically arranged around the first axis.

[0012] Preferably, the outer peripheral surface of the pipe clamp body has a first outer arc surface, a second outer arc surface and a third outer arc surface arranged in sequence along the circumferential direction, the second outer arc surface is arranged corresponding to the second inner arc surface and is concave, so that the outer peripheral wall of the second heat exchange tube is supported thereon, the first outer arc surface is arranged corresponding to the first inner arc surface and protrudes outward, and the third outer arc surface is arranged corresponding to the third inner arc surface and protrudes outward. In this way, the pipe clamp of the utility model can limit two adjacent heat exchange tubes at the same time. At the same time, the shapes of the outer arc surface and the inner arc surface are more conducive to the elastic deformation of the pipe clamp body when it is subjected to the force of the heat exchange tube due to thermal expansion.

[0013] Preferably, the first outer arc surface and the first inner arc surface are arranged concentrically; the third outer arc surface and the third inner arc surface are arranged concentrically.

[0014] Preferably, adjacent outer arc surfaces and adjacent inner arc surfaces are connected by respective smooth transition surfaces, thereby preventing the pipe clamp body from damaging the heat exchange pipe.

[0015] Compared with the prior art, the utility model has the advantages that: by designing the inner circumference of the pipe clamp body to have a structure of a first inner camber surface, a second inner camber surface and a third inner camber surface, when the heat exchange tube expands due to fluctuations in working conditions, the first inner camber surface and the third inner camber surface can produce elastic deformation under the action of the heat exchange tube, providing expansion space for the heat exchange tube to avoid the heat exchange tube being locked by the pipe clamp after expansion. In addition, the second inner camber surface of the pipe clamp body cooperates with the outer circumferential wall of the heat exchange tube to better constrain the heat exchange tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a schematic diagram of the structure of an embodiment of the utility model;

[0017] Figure 2 This is a diagram of the use state of an embodiment of the utility model;

[0018] Figure 3 This is another usage state diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0020] like Figures 1 to 3 As shown, a preferred embodiment of a pipe clamp for a heat exchange tube of the utility model is shown, the pipe clamp includes an inverted U-shaped elastically deformable pipe clamp body 400, the pipe clamp body 400 has a first support section 41 extending upward, a second support section 43 arranged side by side with the first support section 41, and a transition section 42 connecting the two, the first support section 41, the second support section 43 and the transition section 42 jointly define a concave cavity 420 with an opening 410 facing downward, so that the first heat exchange tube 201 can be inserted into the concave cavity 420 through the opening 410.

[0021] The inner circumference of the transition section 42 of the pipe clamp body 400 has a first inner arc surface 421, a second inner arc surface 422 and a third inner arc surface 423 arranged in sequence along the circumferential direction. The second inner arc surface 422 faces the opening 410 and is used to match the outer circumferential wall of the first heat exchange tube 201. The first inner arc surface 421 and the third inner arc surface 423 are both concave outward, and the intersection of the first inner arc surface 421 and the second inner arc surface 422 forms a first convex portion 424 that protrudes inward and is used to be opposite to the outer circumferential wall of the first heat exchange tube 201, and the intersection of the third inner arc surface 423 and the second inner arc surface 422 forms a second convex portion 425 that protrudes inward and is used to be opposite to the outer circumferential wall of the first heat exchange tube 201. The axis extending up and down and passing through the center of the circle corresponding to the second inner arc surface 422 is the first axis 430, and the first inner arc surface 421 and the third inner arc surface 423 are symmetrically arranged with the first axis 430 as the center. At the same time, the outer peripheral surface of the transition section 42 of the pipe clamp body 400 has a first outer arc surface 441, a second outer arc surface 442 and a third outer arc surface 443 arranged in sequence along the circumferential direction. The second outer arc surface 442 is arranged corresponding to the second inner arc surface 422 and is concave, so that the outer peripheral wall of the second heat exchange tube 202 can be supported thereon. The first outer arc surface 441 is arranged corresponding to the first inner arc surface 421 and bulges outward, and the first outer arc surface 441 and the first inner arc surface 421 are arranged concentrically; the third outer arc surface 443 is arranged corresponding to the third inner arc surface 423 and bulges outward, and the third outer arc surface 443 and the third inner arc surface 423 are arranged concentrically. At the same time, in this embodiment, adjacent outer arc surfaces and adjacent inner arc surfaces are connected by their own smooth transition surfaces 440 to avoid damaging the heat exchange tube.

[0022] The pipe clamp further includes two clamping feet 44, which are respectively arranged at the lower end of the first supporting section 41 and the lower end of the second supporting section 43 of the pipe clamp body 400, and the two clamping feet 44 extend outward in opposite directions.

[0023] After the first heat exchange tube 201 is wound on the existing gasket, the clamping feet 44 at the lower ends of the first supporting section 41 and the second supporting section 43 of the pipe clamp body 400 are constrained in the clamping grooves on the gasket.

[0024] When the first heat exchange tube expands due to operating fluctuations, the first inner arc surface 421 and the third inner arc surface 423 can produce elastic deformation under the action of the first heat exchange tube, providing expansion space for the first heat exchange tube to avoid the first heat exchange tube being locked by the pipe clamp body 400 after expansion. The second inner arc surface 422 of the pipe clamp body 400 cooperates with the outer peripheral wall of the first heat exchange tube to better constrain the first heat exchange tube. At the same time, the second outer arc surface 442 of the pipe clamp body 400 can also provide support for the outer peripheral wall of the second heat exchange tube 202. That is, the pipe clamp body of this embodiment can constrain two adjacent heat exchange tubes at the same time. For details, please refer to Figure 3 .

Claims

1. A pipe clamp for a heat exchange pipe, comprising: The U-shaped elastically deformable pipe clamp body (400) has a concave cavity (420) with an opening (410) for inserting the first heat exchange tube (201) into the concave cavity (420) through the opening (410), and the direction of the opening (410) is downward; Features: The upper part of the inner circumferential surface of the concave cavity (420) has a first inner arc surface (421), a second inner arc surface (422) and a third inner arc surface (423) arranged in sequence along the circumferential direction, the second inner arc surface (422) faces the opening (410) and is used to cooperate with the outer circumferential wall of the first heat exchange tube (201), the first inner arc surface (421) and the third inner arc surface (423) are both concave outward, and the intersection of the first inner arc surface (421) and the second inner arc surface (422) forms a first convex portion (424) that protrudes inward and is used to be opposite to the outer circumferential wall of the first heat exchange tube (201), and the intersection of the third inner arc surface (423) and the second inner arc surface (422) forms a second convex portion (425) that protrudes inward and is used to be opposite to the outer circumferential wall of the first heat exchange tube (201).

2. The pipe clamp according to claim 1, characterized in that: The axis extending up and down and passing through the center of the circle corresponding to the second inner arc surface (422) is called the first axis (430), and the first inner arc surface (421) and the third inner arc surface (423) are symmetrically arranged with the first axis (430) as the center.

3. The pipe clamp according to claim 1 or 2, characterized in that: The outer peripheral surface of the pipe clamp body (400) comprises a first outer arc surface (441), a second outer arc surface (442) and a third outer arc surface (443) which are arranged in sequence along the circumferential direction; the second outer arc surface (442) is arranged corresponding to the second inner arc surface (422) and is recessed so that the outer peripheral wall of the second heat exchange tube (202) can be supported thereon; the first outer arc surface (441) is arranged corresponding to the first inner arc surface (421) and protrudes outward; and the third outer arc surface (443) is arranged corresponding to the third inner arc surface (423) and protrudes outward.

4. The pipe clamp according to claim 3, characterized in that: The first outer arc surface (441) and the first inner arc surface (421) are arranged cocentrically; the third outer arc surface (443) and the third inner arc surface (423) are arranged cocentrically.

5. The pipe clamp according to claim 4, characterized in that: Adjacent outer arc surfaces and adjacent inner arc surfaces are connected via respective smooth transition surfaces (440).

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