Heat exchange steel pipe structure for heat exchanger

Abstract

The utility model relates to a heat exchange steel pipe structure for a heat exchanger, which comprises a plurality of U-shaped steel pipes and U-shaped elbows, the number of the U-shaped elbows is one less than that of the U-shaped steel pipes, the U-shaped steel pipes are arranged at equal intervals, two ends of each U-shaped elbow are correspondingly inserted into adjacent ends of the adjacent U-shaped steel pipes, and the U-shaped elbows are arranged at intervals. Fixing rings are arranged on the outer side walls of the two ends of the U-shaped elbow, inserting grooves are formed in the fixing rings, and the ends of the U-shaped steel pipe can be inserted into the inserting grooves, the sealing performance of the welding position of the U-shaped elbow can be effectively improved, and media flowing in the U-shaped elbow and the U-shaped steel pipe are not prone to leakage.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a heat exchange steel pipe structure for a heat exchanger. Background Art

[0002] Traditional heat exchangers generally include fins arranged in parallel and pipes fixed to the fins. The pipe includes an inlet and an outlet. The medium flows into the pipe through the inlet and flows out from the outlet, thereby completing the heat exchange. Most existing heat exchangers usually use steel pipes for their pipes because they have good high temperature resistance, low temperature resistance, and corrosion resistance. Among them, stainless steel pipes, due to their strong hardness, can improve the impact and vibration resistance of the heat exchanger, and gradually replaced copper pipes as pipes for heat exchangers.

[0003] The heat exchange steel pipe as a whole is usually in a spiral structure. In order to fix the fins on the heat exchange steel pipe, the heat exchange steel pipe is usually composed of several parts, which are welded into a spiral structure after the fins are put on. The welding point is the weakest and most leak-prone place on the heat exchange steel pipe. In view of this, the present application improves the structure of the heat exchange steel pipe, improves the sealing effect of the welding point, and improves the yield. Utility Model Content

[0004] The utility model provides a heat exchange steel pipe structure for a heat exchanger with good sealing effect at the welding position, which solves the above-mentioned problems existing in the use process of the prior art.

[0005] The technical solution of the utility model is implemented as follows: a heat exchange steel pipe structure for a heat exchanger, comprising a plurality of U-shaped steel pipes and U-shaped elbows, the number of the U-shaped elbows is one less than the number of the U-shaped steel pipes, the U-shaped steel pipes are arranged equidistantly, the two ends of each of the U-shaped elbows are correspondingly inserted into an adjacent end of each adjacent U-shaped steel pipe, fixing rings are provided on the outer side walls of both ends of the U-shaped elbows, and slots are opened on the fixing rings, and the slots are used for inserting the ends of the U-shaped steel pipes.

[0006] Preferably, the U-shaped steel pipe is provided with a supporting ring on the outer side wall near the end, and the supporting ring is used to resist against the fixing ring after the end of the U-shaped steel pipe is inserted into the slot.

[0007] Preferably, the fixing ring and the abutting ring are fixed by welding after abutting against each other.

[0008] Preferably, the end of the U-shaped steel pipe is provided with a sealing convex ring protruding toward the inner side wall, and the end of the U-shaped elbow is inserted into the end of the U-shaped steel pipe and has an interference fit with the sealing convex ring.

[0009] Preferably, two sealing protruding rings are arranged in parallel inside the end of the U-shaped steel pipe.

[0010] Preferably, an easy-insertion chamfer is provided on the end of the U-shaped elbow.

[0011] Preferably, a medium connecting pipe is connected to one end of the U-shaped steel pipes on both sides away from the other U-shaped steel pipes.

[0012] In summary, the beneficial effects of the present invention are:

[0013] 1. In the utility model, fixing rings are provided on the outer side walls of both ends of the U-shaped elbow, and a slot is provided on the fixing ring. The slot is used for inserting the end of the U-shaped steel pipe. After the end of the U-shaped steel pipe is inserted into the slot, the U-shaped elbow and the U-shaped steel pipe are welded together, which can effectively improve the sealing performance of the welding point, and the medium flowing in the U-shaped elbow and the U-shaped steel pipe is not easy to leak.

[0014] 2. The U-shaped steel pipe is provided with a supporting ring for supporting against the fixing ring after the end of the U-shaped steel pipe is inserted into the slot. The supporting ring and the fixing ring are used for welding and fixing, which is convenient for welding operation and has good welding sealing performance.

[0015] 3. The provision of a sealing convex ring on the end of the U-shaped steel pipe can further improve the sealing effect of the U-shaped elbow inserted on the U-shaped steel pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the exploded structure of a U-shaped elbow and a medium connecting pipe in the utility model;

[0019] Figure 3 for Figure 2 A local enlarged schematic diagram of the middle A;

[0020] Figure 4 A schematic diagram of the cross-sectional structure of the utility model;

[0021] Figure 5 for Figure 4 A partial enlarged schematic diagram of point B in the middle;

[0022] Figure 6It is a schematic diagram of the cross-sectional structure of the U-shaped steel pipe in the utility model;

[0023] Figure 7 It is a structural schematic diagram of the U-shaped elbow in the utility model;

[0024] Figure 8 This is a schematic diagram of the structure of the medium connecting pipe in the utility model;

[0025] Fig. 9 It is a structural schematic diagram of the fins in the utility model installed on the utility model.

[0026] In the figure: 1. U-shaped steel pipe; 11. supporting ring; 12. sealing convex ring; 2. U-shaped elbow; 21. fixing ring; 22. slot; 23. easy-insertion chamfer; 3. medium connecting pipe. DETAILED DESCRIPTION

[0027] The following will be combined with the attached embodiment of the utility model Figure 1-9 , clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Example:

[0029] like Figures 1 to 8 As shown, the utility model discloses a heat exchange steel pipe structure for a heat exchanger, which is Figure 1 The spiral structure shown in the figure includes a plurality of U-shaped steel pipes 1 and U-shaped elbows 2, wherein the number of U-shaped elbows 2 is one less than the number of U-shaped steel pipes 1, and the U-shaped elbows 2 are used to connect the U-shaped steel pipes 1 in series. Specifically, the U-shaped steel pipes 1 are arranged equidistantly, and the two ends of each U-shaped elbow 2 are correspondingly inserted into the adjacent ends of each adjacent U-shaped steel pipe 1, so that all the U-shaped steel pipes 1 are connected, as shown in FIG. Figure 7 and Figure 5 As shown, a fixing ring 21 is provided on the outer side walls of both ends of the U-shaped elbow 2, and a slot 22 is opened on the fixing ring 21, and the slot 22 is used for the end of the U-shaped steel pipe 1 to be inserted.

[0030] Further Figures 3 to 6 As shown, a supporting ring 11 is provided on the outer side wall of the U-shaped steel pipe 1 near the end, and the supporting ring 11 is used to resist against the fixing ring 21 after the end of the U-shaped steel pipe 1 is inserted into the slot 22. Furthermore, the fixing ring 21 and the supporting ring 11 are fixed by welding after resisting each other. Such a structural arrangement makes the welding point of the utility model have an excellent sealing effect.

[0031] In addition, if Figure 5 and Figure 6 As shown, the end of the U-shaped steel pipe 1 is provided with a sealing convex ring 12 protruding toward the inner wall, and the end of the U-shaped elbow 2 is inserted into the end of the U-shaped steel pipe 1 and has an interference fit with the sealing convex ring 12. Two sealing convex rings 12 are arranged in parallel in the end of the U-shaped steel pipe 1. The sealing convex rings 12 can further improve the sealing effect of the U-shaped elbow 2 inserted on the U-shaped steel pipe 1.

[0032] In order to facilitate the insertion of the end of the U-shaped elbow 2 into the U-shaped steel pipe 1 , an easy-insertion chamfer 23 is provided on the end of the U-shaped elbow 2 .

[0033] In the utility model, a medium connecting pipe 3 is connected to one end of the U-shaped steel pipe 1 located on both sides, which is away from other U-shaped steel pipes 1. The connection between the medium connecting pipe 3 and the U-shaped steel pipe 1 is the same as the connection between the U-shaped elbow 2 and the U-shaped steel pipe 1. During operation, the heat exchange medium enters from the medium connecting pipe 3 on one side, flows through each U-shaped steel pipe 1 and the U-shaped elbow 2, and then flows out from the medium connecting pipe 3 on the other side.

[0034] When the utility model is combined with the fin, the fin is first fixed to each U-shaped steel tube 1, and then the U-shaped elbow 2 is inserted into the U-shaped steel tube 1, so that the end of the U-shaped steel tube 1 is inserted into the slot 22 on the fixing ring 21, and the abutting ring 11 on the U-shaped steel tube 1 is abutted on the fixing ring 21 and then welded and fixed, and finally the medium connecting pipe 3 is fixed, and the installation is completed at this time. Fig. 9 shown.

[0035] It should also be pointed out that the terms used in the present invention, such as "front", "rear", "vertical", "horizontal", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A heat exchange steel pipe structure for a heat exchanger, characterized in that: It includes a plurality of U-shaped steel pipes and U-shaped elbows, the number of the U-shaped elbows is one less than the number of the U-shaped steel pipes, the U-shaped steel pipes are arranged equidistantly, the two ends of each U-shaped elbow are correspondingly inserted into an adjacent end of each adjacent U-shaped steel pipe, fixing rings are provided on the outer walls of both ends of the U-shaped elbows, and slots are opened on the fixing rings, and the slots are used for inserting the ends of the U-shaped steel pipes.

2. The heat exchange steel pipe structure for a heat exchanger according to claim 1, characterized in that: The U-shaped steel pipe is provided with a supporting ring on the outer side wall near the end, and the supporting ring is used to support the fixing ring after the end of the U-shaped steel pipe is inserted into the slot.

3. The heat exchange steel pipe structure for a heat exchanger according to claim 2, characterized in that: The fixing ring and the abutting ring are fixed by welding after abutting against each other.

4. The heat exchange steel pipe structure for a heat exchanger according to claim 1, characterized in that: The end of the U-shaped steel pipe is provided with a sealing convex ring protruding toward the inner side wall, and the end of the U-shaped elbow is inserted into the end of the U-shaped steel pipe and is interference-fitted with the sealing convex ring.

5. The heat exchange steel pipe structure for a heat exchanger according to claim 4, characterized in that: Two sealing convex rings are arranged in parallel at the end of the U-shaped steel pipe.

6. The heat exchange steel pipe structure for a heat exchanger according to claim 5, characterized in that: The end of the U-shaped elbow is provided with an easy-insertion chamfer.

7. The heat exchange steel pipe structure for a heat exchanger according to claim 1, characterized in that: A medium connecting pipe is connected to one end of the U-shaped steel pipes located on both sides and away from the other U-shaped steel pipes.

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