Plate-fin heat exchanger with brazed clamping pipes

Abstract

The utility model relates to the technical field of heat exchangers, and discloses a plate-fin heat exchanger with brazed clamping pipes, which comprises a heat exchange box, first medium passing pipes are arranged on the left side and the right side of the heat exchange box, flow collecting boxes are arranged on the upper side and the lower side of the heat exchange box, second medium passing pipes are arranged on the two flow collecting boxes, and a plurality of brazed pipes are arranged in the heat exchange box. A plurality of circulation holes matched with the brazing pipes are formed between the flow collecting box and the heat exchange box, a plurality of connecting bases matched with the circulation holes are arranged on the opposite side walls in the heat exchange box, a baffle ring is fixedly connected to the side face of one end of each connecting base, and the side face of each connecting base is sleeved with a movable ring matched with the corresponding baffle ring. The two ends of the brazing pipe are fixedly connected with connecting rings matched with the connecting bases and the moving rings, and extrusion units used for driving the moving rings to move up and down are arranged on the side faces of the connecting bases. According to the utility model, the brazing pipes can be conveniently replaced and maintained in the later period, and each brazing pipe can be independently replaced, so that the later maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a plate-fin heat exchanger with brazed pipes clamped. Background Technique

[0002] The plate-fin heat exchanger is a highly efficient, compact and low-temperature-resistant heat transfer device. There are several brazed pipes installed in the existing plate-fin heat exchanger, and fins are arranged on the side surfaces of the brazed pipes to improve the heat exchange efficiency of the medium.

[0003] In order to improve the safety of the plate-fin heat exchanger, many improvements have been made to the plate-fin heat exchanger with brazed pipes clamped in the prior art. For example, the patent with the patent publication number CN220018296U discloses a plate-fin heat exchanger with brazed pipes clamped, including a plate-fin heat exchanger main body and a mounting plate. The mounting plate is arranged at the upper and lower ends of the plate-fin heat exchanger main body. Mounting grooves are symmetrically opened on the upper surface and the lower surface of the plate-fin heat exchanger main body. A fixing component is fixedly connected inside the mounting groove. The upper ends of the upper mounting plate are symmetrically provided with first damping springs. The outer surface of the first damping spring is slidably connected with a top plate. The lower ends of the lower mounting plate are symmetrically provided with second damping springs. A plurality of third damping springs are fixedly connected to both sides of the plate-fin heat exchanger main body. One side of the third damping spring is fixedly connected with a buffer plate. By arranging the buffer plate, the first damping spring, the second damping spring, the third damping spring and the top plate, buffering is realized during collision to protect the plate-fin heat exchanger main body.

[0004] The above patent has obvious beneficial effects, but there are still the following deficiencies in actual operation:

[0005] In reality, the brazed pipes in the above-mentioned comparative document are installed inside the heat exchange box by welding or flange installation. Due to long-term heat exchange, the brazed pipes will be damaged. It is more difficult to remove the brazed pipes fixed by welding or flange installation during later maintenance. If the plate-fin heat exchanger is replaced, the later maintenance cost will be increased. Therefore, it is urgent for this field to improve the plate-fin heat exchanger with brazed pipes clamped to solve the defects of the prior art. Content of the Utility Model

[0006] Aiming at the deficiencies of the prior art, the utility model provides a plate-fin heat exchanger with brazed pipes clamped. In the utility model, it is convenient to replace and maintain the brazed pipes in the later stage, and each brazed pipe can be replaced separately, reducing the later maintenance cost.

[0007] To achieve the above object, the present utility model provides the following technical solutions: A plate-fin heat exchanger for brazing and clamping pipes, comprising a heat exchange box. First medium passing pipes are provided on the left and right sides of the heat exchange box. Header boxes are provided on the upper and lower sides of the heat exchange box. Second medium passing pipes are provided on both of the two header boxes. A plurality of brazing pipes are provided in the heat exchange box. A plurality of flow holes adapted to the brazing pipes are formed between the header box and the heat exchange box. A plurality of connection seats adapted to the flow holes are provided on the opposite inner side walls of the heat exchange box. A retaining ring is fixedly connected to one side surface of the connection seat. A moving ring adapted to the retaining ring is sleeved on the side surface of the connection seat. Both ends of the brazing pipe are fixedly connected with connection rings adapted to the connection seat and the moving ring. An extrusion unit for driving the moving ring to move up and down is provided on the side surface of the connection seat.

[0008] Preferably, the extrusion unit includes a rotating ring sleeved on the side surface of the connection seat. An extrusion block is fixedly connected to the upper side surface of the rotating ring. A falling opening is formed on the lower side surface of the moving ring. The moving ring can move when the extrusion block rotates to the position of the falling opening. A limiting unit for limiting the rotating ring is provided on one side of the rotating ring.

[0009] Preferably, the limiting unit includes a fixed block fixedly connected to one side of the rotating ring. A limiting rod with a T-shaped cross-section penetrates through the fixed block. A plurality of limiting holes adapted to the limiting rod are formed on the inner side wall of the heat exchange box. A spring is fixedly connected between one side of the fixed block and one side of the limiting rod.

[0010] Preferably, the outer side surface of the connection ring and the inner side wall of the moving ring are both adapted inclined surfaces. First arc grooves are formed on the opposite side surfaces of the connection ring and the moving ring. An elastic first sealing ring is embedded in the first arc groove.

[0011] Preferably, symmetric limiting blocks are fixedly connected to the inner side wall of the moving ring. Symmetric limiting grooves adapted to the limiting blocks are formed on the side surface of the connection seat.

[0012] Preferably, a plurality of first balls are embedded in the lower side surface of the rotating ring. A second arc groove adapted to the first balls is formed on the inner side wall of the heat exchange box. A plurality of second balls are embedded in the upper side surface of the extrusion block. A third arc groove adapted to the second balls is formed on the lower side surface of the moving ring.

[0013] Preferably, a threaded connection portion adapted to the flow hole is formed on the side surface of the connection seat. A detachable cover plate is fixedly installed on one side of the heat exchange box through a fastener. A second sealing ring is provided between the cover plate and the side surface of the heat exchange box.

[0014] Aiming at the deficiencies of the prior art, the present utility model provides a plate-fin heat exchanger for brazing and clamping pipes, overcoming the deficiencies of the prior art. The beneficial effects of the present utility model are as follows:

[0015] 1. In the present utility model, when the brazing tube needs to be replaced, the extrusion unit cancels the extrusion force on the moving ring, and the moving ring can move. The moving ring disengages from the connecting ring, and then the brazing tube can be removed. The connecting rings at both ends of the new brazing tube are aligned with the connecting seat, and the extrusion unit is used to extrude the moving ring upward, so that the moving ring is sealed with the connecting ring, completing the replacement of the brazing tube. This facilitates the replacement and maintenance of the brazing tube in the later stage, and each brazing tube can be replaced separately, reducing the later maintenance cost.

[0016] 2. In the present utility model, when the limiting rod is pulled upward and the rotating ring is rotated, when the extrusion block on the rotating ring moves to the position of the falling port, the moving ring can slide along the side surface of the connecting seat. When the extrusion block moves to a position other than the falling port, the extrusion block extrudes the moving ring, and the moving ring tightly abuts against the connecting ring. Then, a suitable limiting hole is selected, and the lower end of the limiting rod is inserted into the limiting hole. The tensile force of the spring limits the position of the limiting rod, achieving the effect of facilitating the replacement of the brazing tube.

[0017] 3. In the present utility model, when the rotating ring is rotated, the first ball slides in the second arc groove, and the second ball slides in the third arc groove, reducing the frictional resistance suffered when the rotating ring rotates, which is convenient for maintenance personnel to operate.

[0018] Other features and advantages of the present utility model will be described in the following specification. And, partly, they will be obvious from the specification, or can be understood by implementing the present utility model. The objectives and other advantages of the present utility model can be realized and obtained by the structures pointed out in the specification, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings are used to provide further understanding of the present utility model, and constitute a part of the specification. They are used together with the embodiments of the present utility model to explain the present utility model, and do not constitute a limitation to the present utility model.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0021] Figure 2 It is a schematic diagram of the internal structure of the heat exchange box in the present utility model;

[0022] Figure 3 It is a schematic diagram of the overall sectional structure of the present utility model;

[0023] Figure 4 It is a schematic diagram of the separation of the connecting ring and the connecting seat in the present utility model;

[0024] Figure 5 It is a schematic diagram of the separation of the connecting seat, the moving ring and the rotating ring in the present utility model;

[0025] Figure 6 isFigure 3 Schematic enlarged structure diagram at position A in

[0026] Figure 7 is Figure 5 Schematic enlarged structure diagram at position B in

[0027] Figure 8 is Figure 6 Schematic enlarged structure diagram at position C in

[0028] In the figure: 1, heat exchange box; 2, first medium through pipe; 3, manifold box; 4, second medium through pipe; 5, brazing pipe; 6, circulation hole; 7, connection seat; 8, retaining ring; 9, moving ring; 10, connection ring; 11, extrusion unit; 12, rotating ring; 13, extrusion block; 14, falling opening; 15, fixing block; 16, limiting rod; 17, limiting hole; 18, spring; 19, first arc groove; 20, first sealing ring; 21, limiting block; 22, limiting groove; 23, second arc groove; 24, first ball; 25, third arc groove; 26, second ball; 27, threaded connection part; 28, cover plate; 29, second sealing ring. Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0030] Embodiment 1

[0031] Please refer to Figures 1-8 , a plate-fin heat exchanger with brazed pipes, including a heat exchange box 1. First medium through pipes 2 are provided on the left and right sides of the heat exchange box 1. Manifold boxes 3 are provided on the upper and lower sides of the heat exchange box 1. Second medium through pipes 4 are provided on both of the two manifold boxes 3. A number of brazing pipes 5 are provided in the heat exchange box 1. A number of circulation holes 6 adapted to the brazing pipes 5 are opened between the manifold box 3 and the heat exchange box 1. A number of connection seats 7 adapted to the circulation holes 6 are provided on the opposite side walls in the heat exchange box 1. A retaining ring 8 is fixedly connected to one end side of the connection seat 7. A moving ring 9 adapted to the retaining ring 8 is sleeved on the side of the connection seat 7. Connection rings 10 adapted to the connection seats 7 and the moving ring 9 are fixedly connected to both ends of the brazing pipe 5. An extrusion unit 11 for driving the moving ring 9 to move up and down is provided on the side of the connection seat 7.

[0032] Specific implementation method in this embodiment: When heat is exchanged with the medium, the heat exchange medium flows through the first medium through pipe 2, and the medium to be heat-exchanged enters the manifold 3 through the first medium through pipe 2 and enters the brazed pipe 5 through the flow hole 6. A number of fins (not shown in the figure) are welded to the side of the brazed pipe 5 mentioned above, and it exchanges medium with the heat exchange medium in the heat exchange box 1 and flows out through another second medium through pipe 4. When the brazed pipe 5 needs to be replaced, the extrusion force of the moving ring 9 is cancelled by the extrusion unit 11, the moving ring 9 can move, the moving ring 9 is separated from the connecting ring 10, and then the brazed pipe 5 can be removed. The connecting rings 10 at both ends of the new brazed pipe 5 are aligned with the connecting seat 7, and the moving ring 9 is extruded to move upward by the extrusion unit 11, so that the moving ring 9 is sealed with the connecting ring 10, completing the replacement of the brazed pipe 5, facilitating the later replacement and maintenance of the brazed pipe 5, and each brazed pipe 5 can be replaced separately, reducing the later maintenance cost.

[0033] Embodiment Two

[0034] Please refer to Figure 4 、 Figure 5 、 Figure 6 and Figure 7 This embodiment includes the above-mentioned embodiment. Among them, it further includes: The extrusion unit 11 includes a rotating ring 12 sleeved on the side of the connecting seat 7. An extrusion block 13 is fixedly connected to the upper side of the rotating ring 12. A falling port 14 is formed on the lower side of the moving ring 9. When the extrusion block 13 rotates to the position of the falling port 14, the moving ring 9 can move. A limiting unit is provided on one side of the rotating ring 12. The limiting unit includes a fixed block 15 fixedly connected to one side of the rotating ring 12. A limiting rod 16 with a T-shaped cross-section penetrates through the fixed block 15. A number of limiting holes 17 adapted to the limiting rod 16 are formed on the inner side wall of the heat exchange box 1. A spring 18 is fixedly connected between one side of the fixed block 15 and one side of the limiting rod 16.

[0035] Specific implementation method in this embodiment: Pull the limiting rod 16 upward, one end of the limiting rod 16 is separated from the limiting hole 17, and at this time the spring 18 is stretched. By rotating the rotating ring 12, when the extrusion block 13 on the rotating ring 12 moves to the position of the falling port 14, the moving ring 9 can slide along the side of the connecting seat 7. When the extrusion block 13 moves to a position other than the falling port 14, the extrusion block 13 squeezes the moving ring 9, the moving ring 9 abuts against the connecting ring 10, and a suitable limiting hole 17 is selected, and the lower end of the limiting rod 16 is inserted into the limiting hole 17. The pulling force of the spring 18 limits the position of the limiting rod 16, achieving the effect of facilitating the replacement of the brazed pipe 5.

[0036] Embodiment Three

[0037] Please refer to Figure 6 and Figure 8, This embodiment includes all of the above embodiments, and further includes: The outer side surface of the connecting ring 10 and the inner side wall of the moving ring 9 are both adapted inclined surfaces. The opposite side surfaces of the connecting ring 10 and the moving ring 9 are both provided with first arc-shaped grooves 19. An elastic first sealing ring 20 is embedded in the first arc-shaped groove 19. Symmetric limiting blocks 21 are fixedly connected to the inner side wall of the moving ring 9. Symmetric limiting grooves 22 adapted to the limiting blocks 21 are provided on the side surface of the connecting seat 7.

[0038] The specific implementation in this embodiment: The first sealing ring 20 is embedded in one of the first arc-shaped grooves 19. The moving ring 9 squeezes the first sealing ring 20 to improve the sealing performance after the brazed pipe 5 is installed. When the moving ring 9 moves up and down, the limiting blocks 21 move in the limiting grooves 22, restricting the moving ring 9 to only move up and down.

[0039] Embodiment Four

[0040] Please refer to Figure 1 、 Figure 2 、 Figure 6 and Figure 8 , This embodiment includes all of the above embodiments, and further includes: A plurality of first balls 24 are embedded in the lower side surface of the rotating ring 12. Second arc-shaped grooves 23 adapted to the first balls 24 are provided on the inner side wall of the heat exchange box 1. A plurality of second balls 26 are embedded in the upper side surface of the extrusion block 13. Third arc-shaped grooves 25 adapted to the second balls 26 are provided on the lower side surface of the moving ring 9. A threaded connection portion 27 adapted to the through hole 6 is provided on the side surface of the connecting seat 7. A detachable cover plate 28 is fixedly installed on one side of the heat exchange box 1 through a fastener. A second sealing ring 29 is provided between the cover plate 28 and the side surface of the heat exchange box 1.

[0041] The specific implementation in this embodiment: When the rotating ring 12 rotates, the first balls 24 slide in the second arc-shaped grooves 23, and the second balls 26 slide in the third arc-shaped grooves 25, reducing the frictional resistance suffered when the rotating ring 12 rotates, facilitating the operation of maintenance personnel. The cover plate 28 is detachable, facilitating the maintenance personnel to replace the internal brazed pipe 5. When installing the cover plate 28, the second sealing ring 29 is embedded between the cover plate 28 and the heat exchange box 1, improving the sealing performance after the cover plate 28 is installed. The connecting seat 7 is installed at the position of the through hole 6 through the threaded connection portion 27, facilitating the installation of the connecting seat 7.

[0042] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A plate-fin heat exchanger with a brazed clamp tube, comprising a heat exchange box (1), wherein first medium passing tubes (2) are provided on the left and right sides of the heat exchange box (1), characterized in that: The heat exchange box (1) is provided with collecting boxes (3) on both upper and lower sides, and the two collecting boxes (3) are both provided with second medium passing tubes (4). The heat exchange box (1) is provided with a plurality of brazed tubes (5). A plurality of flow holes (6) adapted to the brazed tubes (5) are provided between the collecting box (3) and the heat exchange box (1). The heat exchange box (1) is provided with a plurality of connecting seats (7) adapted to the flow holes (6) on opposite side walls. A retaining ring (8) is fixedly connected to the side surface of one end of the connecting seat (7). A movable ring (9) adapted to the retaining ring (8) is sleeved on the side surface of the connecting seat (7). Connecting rings (10) adapted to the connecting seat (7) and the movable ring (9) are fixedly connected to both ends of the brazed tube (5). An extrusion unit (11) for driving the movable ring (9) to move up and down is provided on the side surface of the connecting seat (7).

2. A plate-fin heat exchanger with brazed clamped tubes according to claim 1, characterized in that: The extrusion unit (11) comprises a rotating ring (12) sleeved on the side of the connecting seat (7); an extrusion block (13) is fixedly connected to the upper side of the rotating ring (12); a lower side of the movable ring (9) is provided with a drop opening (14); when the extrusion block (13) rotates to the position of the drop opening (14), the movable ring (9) can move; and a limiting unit for limiting the position of the rotating ring (12) is provided on one side of the rotating ring (12).

3. A plate-fin heat exchanger with brazed clamped tubes according to claim 2, characterized in that: The limiting unit comprises a fixed block (15) fixedly connected to one side of the rotating ring (12); a limiting rod (16) having a T-shaped cross section passes through the fixed block (15); a plurality of limiting holes (17) adapted to the limiting rod (16) are provided on the inner wall of the heat exchange box (1); and a spring (18) is fixedly connected between one side of the fixed block (15) and one side of the limiting rod (16).

4. A plate-fin heat exchanger with brazed clamped tubes according to claim 1, characterized in that: The outer side surface of the connecting ring (10) and the inner side wall of the moving ring (9) are both adapted inclined surfaces, and the facing sides of the connecting ring (10) and the moving ring (9) are both provided with a first arc-shaped groove (19), and a first elastic sealing ring (20) is embedded in the first arc-shaped groove (19).

5. The plate-fin heat exchanger with brazed clamped tube according to claim 1, characterized in that: A symmetrical limiting block (21) is fixedly connected to the inner side wall of the movable ring (9), and a symmetrical limiting groove (22) adapted to the limiting block (21) is formed on the side surface of the connecting seat (7).

6. A plate-fin heat exchanger with brazed clamped tubes according to claim 2, characterized in that: A plurality of first balls (24) are embedded in the lower side of the rotating ring (12), a second arc groove (23) adapted to the first balls (24) is provided on the inner wall of the heat exchange box (1), a plurality of second balls (26) are embedded in the upper side of the extrusion block (13), and a third arc groove (25) adapted to the second balls (26) is provided on the lower side of the movable ring (9).

7. A plate-fin heat exchanger with brazed clamped tubes according to claim 1, characterized in that: A threaded connection portion (27) adapted to the circulation hole (6) is provided on the side of the connection seat (7); a detachable cover plate (28) is fixedly mounted on one side of the heat exchange box (1) via fasteners; a second sealing ring (29) is provided between the cover plate (28) and the side of the heat exchange box (1).

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