Conical thin-wall heat exchange tube

Abstract

The utility model discloses a conical thin-wall heat exchange tube, which comprises a thin-wall heat exchange tube outer wall, an external thread, a conical heat exchange head, a heat exchange head inner channel, an internal thread and a thin-wall heat exchange tube body, the external thread is arranged on the thin-wall heat exchange tube outer wall and positioned on the outer wall of a port, and the heat exchange head inner channel is arranged on the conical heat exchange head. The inner wall of the heat exchange head inner channel is provided with an internal thread, the internal thread is screwed with the external thread, and the conical heat exchange head is provided with a slotted hole. The thin-wall heat exchange tube solves the welding problem by not changing the thickness of the tube walls at the two ends of the thin-wall heat exchange tube; the problem that the heat-conducting property of the thin-wall heat-conducting pipe is influenced by heat medium flow resistance increased by compressing the inner cavity space of the pipeline is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of a conical thin-wall heat exchange tube, in particular to a conical thin-wall heat exchange tube. Background Technique

[0002] The heat exchange tube is one of the components of the heat exchanger, which is placed inside the cylinder body and used for heat exchange between two media. Common materials include carbon steel, low alloy steel, stainless steel, copper, copper-nickel alloy, aluminum alloy, titanium, etc. In addition, there are also some non-metallic materials, such as graphite, ceramics, polytetrafluoroethylene, etc. When designing, appropriate materials should be selected according to the working pressure, temperature and medium corrosiveness, etc. The thin-wall heat exchange tube generally uses a thin-wall tube with a wall thickness of less than 3 mm, mainly to improve the heat exchange efficiency of the heat exchange tube, but there are problems in the production process, that is, it is very difficult to ensure the product quality for the welding between the heat exchange head and the tube sheet, which increases the production cost.

[0003] After retrieval, the Chinese utility model patent CN201488622U discloses a heat exchange tube with an inner conical tube end, which includes a thin-wall heat exchange tube. The characteristic is that the wall thickness of both ends of the heat exchange tube gradually decreases from the end inward within a range of 500 mm from the tube end until the thin wall thickness, and the middle part is the thin wall for main body heat exchange. The advantages of the utility model are not only to maintain the heat exchange efficiency of the thin-wall heat exchange tube, but also to solve the welding problem between the heat exchange tube and the tube sheet.

[0004] The technical solution in this application document still has deficiencies: by changing the wall thickness of both ends of the thin-wall heat exchange tube to solve the welding problem, the space inside the pipeline cavity is compressed, the resistance of the hot medium flow is increased, and the heat conduction performance of the thin-wall heat conduction tube is affected. Content of the Utility Model

[0005] The purpose of the utility model is to provide a conical thin-wall heat exchange tube to solve the problems put forward in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: a conical thin-wall heat exchange tube, including the outer wall of the thin-wall heat exchange tube, external threads, conical heat exchange heads, inner channels of the heat exchange heads, internal threads and the thin-wall heat exchange tube body. External threads are provided on the outer wall of the thin-wall heat exchange tube at the port. The conical heat exchange heads are provided with inner channels of the heat exchange heads. Internal threads are provided on the inner wall of the inner channels of the heat exchange heads. The internal threads are screwed with the external threads. The conical heat exchange heads are provided with slot holes.

[0007] By adopting the above technical solution, external threads are set on the outer walls of the ports at both ends of the thin-walled heat exchange tube body, which cooperate with the internal threads set on the inner wall of the inner channel of the conical heat exchange head, so that the conical heat exchange head is installed on the ports at both ends of the thin-walled heat exchange tube body, and then welding operation is performed between the conical heat exchange head and the tube sheet to complete the welding and fixation between the thin-walled heat exchange tube body and the tube sheet. The slots opened in the conical heat exchange head allow foreign matter to enter the slots and exchange heat with the outer wall of the thin-walled heat exchange tube, which can increase the heat exchange efficiency between the heat medium in the thin-walled heat exchange tube body and the foreign matter, and reduce the problem that the thermal conductivity of the thin-walled heat conduction tube is affected by the overall tube wall thickness of the conical heat exchange head. The welding problem is solved by not changing the thickness of the tube wall at both ends of the thin-walled heat exchange tube, avoiding the problem that the compression of the inner cavity space of the pipeline increases the flow resistance of the heat medium and affects the thermal conductivity of the thin-walled heat conduction tube.

[0008] Preferably, the conical heat exchange head is conical, and the thickness of the conical heat exchange head located at the end of the outer wall of the thin-walled heat exchange tube gradually decreases toward the rear of the outer wall of the thin-walled heat exchange tube.

[0009] By adopting the above technical solution, the conical heat exchange head is conical, and the thickness gradually decreases from the port of the outer wall of the thin-walled heat exchange tube to the rear of the outer wall of the thin-walled heat exchange tube. When welding, welding can be carried out from the thicker part of the conical heat exchange head tube wall to avoid the problem of easy welding through of the thin tube wall.

[0010] Preferably, the slots are arranged in a ring shape along the conical heat exchange head, the slots penetrate the outer wall of the thin-walled heat exchange tube, and the aperture depth of the slots changes with the thinness of the tube wall of the conical heat exchange head.

[0011] By adopting the above technical solution, multiple groups of slots on the conical heat exchange head are arranged along the ring of the conical heat exchange head. The aperture depth of each group of slots arranged in the ring will change with the thinness of the tube wall of the conical heat exchange head. Foreign matter enters the slots and performs heat exchange with the outer wall of the thin-walled heat exchange tube, which can increase the heat exchange efficiency between the heat medium and foreign matter in the thin-walled heat exchange tube body, and reduce the problem that the thermal conductivity of the thin-walled heat transfer tube is affected by the overall tube wall thickness of the conical heat exchange head.

[0012] Preferably, the thin-walled heat exchange tube body includes an outer wall of the thin-walled heat exchange tube and an inner channel of the thin-walled heat exchange tube.

[0013] By adopting the above technical solution, heat medium flows through the inner channel of the thin-walled heat exchange tube, and the outer wall of the thin-walled heat exchange tube is made of a material with high thermal conductivity for heat exchange operation.

[0014] Preferably, the inner channel of the thin-walled heat exchange tube is connected to the inner channel of the heat exchange head.

[0015] Preferably, both ends of the thin-walled heat exchange tube body are equipped with conical heat exchange heads through external threads.

[0016] By adopting the above technical solution, conical heat exchange heads are installed at the ports at both ends of the thin-walled heat exchange tube body, and then welding operations between the conical heat exchange heads and the tube sheet are carried out to complete the welding and fixing between the thin-walled heat exchange tube body and the tube sheet, thus solving the welding problem.

[0017] Preferably, the wall thickness of the pipeline of the thin-walled heat exchange tube body is 2.8 mm.

[0018] By adopting the above technical solution, a wall thickness of 2.8 mm for the pipeline of the thin-walled heat exchange tube body can effectively improve the heat exchange efficiency of the heat exchange tube.

[0019] Compared with the prior art, the beneficial effect of the present utility model is that the welding problem is solved by not changing the wall thickness at both ends of the thin-walled heat exchange tube, avoiding the problem that the compression of the inner cavity space of the pipeline increases the flow resistance of the heat medium and affects the heat conduction performance of the thin-walled heat conduction tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional structural schematic diagram of the present utility model.

[0021] Figure 2 is a schematic cross-sectional view of the conical heat exchange head of the present utility model.

[0022] Figure 3 is a schematic cross-sectional view of the thin-walled heat exchange tube of the present utility model.

[0023] Figure 4 is a schematic diagram of the combined installation structure of the present utility model.

[0024] Figure 5 is a front structural schematic diagram of the conical heat exchange head of the present utility model.

[0025] In the figure: 1. Outer wall of the thin-walled heat exchange tube; 2. Inner channel of the thin-walled heat exchange tube; 3. External thread; 4. Conical heat exchange head; 5. Inner channel of the heat exchange head; 6. Internal thread; 7. Slot hole; 8. Thin-walled heat exchange tube body. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0027] Refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5, including the outer wall 1 of the thin-walled heat exchange tube, external threads 3, conical heat exchange head 4, internal channel 5 in the heat exchange head, internal threads 6, and the thin-walled heat exchange tube body 8. External threads 3 are provided on the outer wall of the thin-walled heat exchange tube 1 at the port. An internal channel 5 is provided in the conical heat exchange head 4, and internal threads 6 are provided on the inner wall of the internal channel 5 in the heat exchange head. The internal threads 6 are screwed with the external threads 3. A slot hole 7 is provided in the conical heat exchange head 4. By providing external threads 3 on the outer walls of the ports at both ends of the thin-walled heat exchange tube body 8 and cooperating with the internal threads 6 provided on the inner wall of the internal channel 5 in the conical heat exchange head 4, the conical heat exchange head 4 is installed on the ports at both ends of the thin-walled heat exchange tube body 8. Then, welding operations between the conical heat exchange head 4 and the tube sheet are carried out to complete the welding and fixing between the thin-walled heat exchange tube body 8 and the tube sheet. The slot hole 7 provided in the conical heat exchange head 4 allows external substances to enter the slot hole 7 and perform heat exchange operations with the outer wall 1 of the thin-walled heat exchange tube, which can increase the heat exchange efficiency between the heat medium in the thin-walled heat exchange tube body 8 and the external substances, reduce the problem that the overall wall thickness of the conical heat exchange head 4 affects the heat conduction performance of the thin-walled heat conduction tube, solve the welding problem by not changing the wall thickness at both ends of the thin-walled heat exchange tube, and avoid the problem that compressing the inner cavity space of the pipeline increases the flow resistance of the heat medium and affects the heat conduction performance of the thin-walled heat conduction tube.

[0028] Refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , the conical heat exchange head 4 is conical, and the thickness of the conical heat exchange head 4 gradually decreases towards the rear of the outer wall 1 of the thin-walled heat exchange tube at the port of the outer wall 1 of the thin-walled heat exchange tube. The conical heat exchange head 4 is conical, and the thickness gradually decreases towards the rear of the outer wall 1 of the thin-walled heat exchange tube from the port of the outer wall 1 of the thin-walled heat exchange tube. During welding, welding can be carried out from the thicker part of the wall of the conical heat exchange head 4 to avoid the problem of easy penetration due to the thinner wall. The slot hole 7 is arranged annularly along the conical heat exchange head 4, and the slot hole 7 penetrates the outer wall 1 of the thin-walled heat exchange tube. The pore diameter and depth of the slot hole 7 change with the wall thickness of the conical heat exchange head 4. There are multiple groups of slot holes 7 arranged annularly along the conical heat exchange head 4, and the pore diameter and depth of each group of annularly arranged slot holes 7 change with the wall thickness of the conical heat exchange head 4. External substances enter the slot hole 7 and perform heat exchange operations with the outer wall 1 of the thin-walled heat exchange tube, which can increase the heat exchange efficiency between the heat medium in the thin-walled heat exchange tube body 8 and the external substances, and reduce the problem that the overall wall thickness of the conical heat exchange head 4 affects the heat conduction performance of the thin-walled heat conduction tube.

[0029] Refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5, the thin-walled heat exchange tube body 8 includes a thin-walled heat exchange tube outer wall 1 and a thin-walled heat exchange tube inner channel 2. The heat medium flows through the thin-walled heat exchange tube inner channel 2. The thin-walled heat exchange tube outer wall 1 is made of a material with high thermal conductivity for heat exchange operations. The thin-walled heat exchange tube inner channel 2 is connected to the heat exchange head inner channel 5. Conical heat exchange heads 4 are installed at both ends of the thin-walled heat exchange tube body 8 through the externally threaded portions 3 provided. The conical heat exchange heads 4 are installed on the ports at both ends of the thin-walled heat exchange tube body 8, and then welding operations with the tube sheet are performed on the conical heat exchange heads 4 to complete the welding and fixing between the thin-walled heat exchange tube body 8 and the tube sheet, solving the welding problem. The wall thickness of the thin-walled heat exchange tube body 8 is 2.8 mm. The wall thickness of the thin-walled heat exchange tube body 8 being 2.8 mm can effectively improve the heat exchange efficiency of the heat exchange tube.

[0030] The implementation principle of the conical thin-walled heat exchange tube in the embodiment of the present application is the working principle: by providing externally threaded portions 3 on the outer walls of the ports at both ends of the thin-walled heat exchange tube body 8 and cooperating with the internally threaded portions 6 provided on the inner walls of the heat exchange head inner channels 5 on the conical heat exchange heads 4, the conical heat exchange heads 4 are installed on the ports at both ends of the thin-walled heat exchange tube body 8, and then welding operations with the tube sheet are performed on the conical heat exchange heads 4 to complete the welding and fixing between the thin-walled heat exchange tube body 8 and the tube sheet. The slotted holes 7 provided on the conical heat exchange heads 4 allow foreign substances to enter the slotted holes 7 for heat exchange operations with the thin-walled heat exchange tube outer wall 1, which can increase the heat exchange efficiency between the heat medium in the thin-walled heat exchange tube body 8 and the foreign substances, reducing the problem that the overall wall thickness of the conical heat exchange head 4 affects the heat conduction performance of the thin-walled heat conduction tube. By not changing the wall thickness of both ends of the thin-walled heat exchange tube, the welding problem is solved, avoiding the problem that compressing the inner cavity space of the pipeline increases the flow resistance of the heat medium and affects the heat conduction performance of the thin-walled heat conduction tube.

[0031] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tapered thin-walled heat exchange tube, comprising a thin-walled heat exchange tube outer wall (1), an external thread (3), a tapered heat exchange head (4), an inner channel of the heat exchange head (5), an internal thread (6) and a thin-walled heat exchange tube body (8), characterized in that: An external thread (3) is provided on the outer wall of the thin-walled heat exchange tube (1) at the outer wall of the port, a heat exchange head inner channel (5) is provided on the conical heat exchange head (4), an internal thread (6) is provided on the inner wall of the heat exchange head inner channel (5), the internal thread (6) is screwed with the external thread (3), and a slot (7) is provided on the conical heat exchange head (4).

2. The tapered thin-walled heat exchange tube according to claim 1, characterized in that: The conical heat exchange head (4) is conical, and the thickness of the conical heat exchange head (4) located at the end of the thin-walled heat exchange tube outer wall (1) gradually decreases toward the rear of the thin-walled heat exchange tube outer wall (1).

3. The tapered thin-walled heat exchange tube according to claim 1, characterized in that: The slots (7) are arranged in a ring shape along the conical heat exchange head (4), and the slots (7) penetrate the outer wall (1) of the thin-walled heat exchange tube.

4. The tapered thin-walled heat exchange tube according to claim 1, characterized in that: The thin-walled heat exchange tube body (8) comprises a thin-walled heat exchange tube outer wall (1) and a thin-walled heat exchange tube inner channel (2), and the thin-walled heat exchange tube inner channel (2) is connected to the heat exchange head inner channel (5).

5. The tapered thin-walled heat exchange tube according to claim 1, characterized in that: Both ends of the thin-walled heat exchange tube body (8) are mounted with conical heat exchange heads (4) via external threads (3). The thickness of the tube wall of the thin-walled heat exchange tube body (8) is 2.8 mm.

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