Fin type heat exchanger tube expander

Abstract

The invention provides a fin heat exchanger tube expander, and relates to the field of machining, the fin heat exchanger tube expander comprises a fixed base, a rotary base, a positioning table and a workbench, one end of the fixed base is connected with a limiting wall, the limiting wall is provided with a vertical slide way, the section of the vertical slide way is T-shaped, and the vertical slide way is internally connected with a positioning slide block; the positioning sliding block can move up and down in the vertical sliding way, the lower end of the positioning sliding block is connected with the workbench, the workbench can only move up and down along the vertical sliding way through the positioning sliding block, and a hydraulic telescopic cylinder is arranged below the workbench. The hydraulic tube expanding structure has the beneficial effects that the rotation of the heat exchanger is realized through the cooperation of the rotating base and the hydraulic telescopic cylinder, so that the same hydraulic tube expanding structure performs tube expanding operation twice on the heat exchanger, and the condition that a base tube is deformed or damaged in the tube expanding operation can be effectively prevented through the cooperation of the protective sleeve.

Description

Technical Field

[0001] The invention relates to the field of mechanical processing, in particular to a tube expander for a fin heat exchanger. Background Art

[0002] The material of the base tube is generally aluminum tube or copper tube, and fins are rolled on the surface of the copper tube. The fins increase the heat exchange surface area of ​​the copper tube, thereby improving the heat exchange efficiency of the cooler. Based on this, the fins on the copper tube of the cooler must be tightly combined with the tube wall of the copper tube and cannot be loose. If they are loose, gaps for air circulation will inevitably appear, which will affect the heat exchange efficiency. Therefore, the tight combination of the cooler copper tube and the fin is achieved by expanding the diameter of the copper tube with an expander. Now, a fin heat exchanger expander with a publication number of CN107999646A has been retrieved, which includes a frame, a mold, a cloth device, and a push-expansion device; the frame is provided with a guide rail; the mold is arranged parallel to it; the cloth device includes: a walking mechanism, a fin stacking plate; the walking mechanism is installed on the guide rail and is located above the mold; the fin stacking plate is arranged On the walking mechanism; the pushing and expanding device includes: a base tube fixing device and a core pushing and expanding drive device; the base tube fixing device is arranged at both ends of the mold, and the core pushing and expanding drive device includes a driving motor, a driving chain, a core expanding fixing device, a driving sprocket, and an expanding core; the driving sprockets are respectively arranged in the middle of the frame and at one end away from the mold; the driving motor is connected to the driving sprocket via a reduction mechanism; the driving chain is installed on the driving sprocket; the core expanding fixing device includes: a core expanding fixing frame and a core expanding fixing fixture; the core expanding fixing frame is door-shaped, installed on the guide rail, and fixedly connected to the driving chain; the core expanding fixing fixture is fixed on the core expanding fixing frame.

[0003] However, in the above technology, the heat exchanger is expanded by a fin stacking plate and a pushing device, and the heat exchanger is fixed by clamping, which easily causes damage to the fins, and the equipment is cumbersome, the efficiency is low, and the production cost is high. Summary of the invention

[0004] The problem to be solved by the present invention is to realize the tube expansion operation of the fin heat exchanger by means of a simpler structure, and to better prevent the fins of the fin heat exchanger from being damaged due to clamping during the tube expansion operation.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is a fin heat exchanger tube expander, comprising a fixed base, a rotating base, a positioning table and a workbench, wherein one end of the fixed base is connected to a limited wall, a vertical slide is arranged on the limited wall, the cross-section of the vertical slide is "T"-shaped, a positioning slider is connected in the vertical slide, the positioning slider can move up and down in the vertical slide, the lower end of the positioning slider is connected to the workbench, the positioning slider can make the workbench only move up and down along the vertical slide, and a hydraulic telescopic cylinder is arranged under the workbench, the hydraulic telescopic cylinder is arranged in the fixed base, the hydraulic telescopic cylinder can drive the workbench to rise or fall, the rotating base and the workbench are both connected to the fixed base, the rotating base is arranged at one end of the fixed base away from the limiting wall, a hydraulic motor is arranged in the rotating base, and the hydraulic motor can drive the positioning table to rotate when it rotates, the rotating base rotates 180 degrees each time, and a hydraulic tube expansion structure is arranged on the workbench, through which the hydraulic tube expansion structure can be used to expand the tubes of non-finned heat exchangers.

[0006] More preferably, an internal space is provided inside the positioning platform, a plug interface is provided at one end of the positioning platform, the plug interface is connected to the internal space, and an auxiliary board is plugged into the plug interface, and the auxiliary board can be pulled out or inserted into the internal space of the positioning platform through the plug interface of the positioning platform.

[0007] More preferably, a limited slide is provided on the side walls on both sides of the positioning platform, a power structure and a lifting rod are provided in the limited slide, the lifting rod is provided with bar teeth, which are connected to the power structure through the bar teeth, so that the power structure can drive the lifting rod to move, and a support plate is connected to the lifting rod.

[0008] More preferably, the power structure includes a servo motor, a power gear, a driven gear and a transmission chain, wherein the servo motor is connected to the power gear, there are at least two driven gears, and both the power gear and the driven gear are meshed and connected to the transmission chain.

[0009] More preferably, a limit arm is provided on the positioning slider, the limit arm and the positioning platform are parallel, a pushing platform is provided on the limit arm, the pushing platform can move along the length direction of the limit arm, and a first screw motor is provided on the workbench, the slider of the first screw motor is connected to the pushing platform, so that the first screw motor can drive the pushing platform to move.

[0010] More preferably, a transverse slide is provided on the pushing platform, a second screw motor is provided in the transverse slide, a plurality of sliders are provided on the second screw motor, each slider is provided with an electromagnetic clutch, and the electromagnetic clutch controls the engagement and separation of the slider and the second screw motor, so as to realize individual control of the movement of each slider, and a hydraulic expansion tube structure is connected to each slider, the slider can drive the hydraulic expansion tube structure to move along the transverse slide, and the pushing platform can drive the hydraulic expansion tube structure to move along the length direction of the limit arm.

[0011] More preferably, a telescopic cylinder is provided at the end of the limit arm, a protective plate is connected to the telescopic cylinder, an expansion slideway and a protective sleeve slideway are provided on the protective plate, and the expansion head of the hydraulic expansion structure can be inserted into the expansion slideway and can move in the expansion slideway.

[0012] More preferably, a protective sleeve is arranged in the expansion slide, the protective sleeve is a barrel-shaped structure, and the bottom wall of the protective sleeve is arranged in the protective sleeve slide. The protective sleeve can move along the protective sleeve slide, and the expansion head penetrates the center position of the bottom wall of the protective sleeve and enters the protective sleeve.

[0013] Compared with the prior art, the beneficial effects of the present invention are: the rotation of the heat exchanger is achieved by cooperating with the rotating base and the hydraulic telescopic cylinder, so that the same hydraulic expansion tube structure can perform two expansion operations on the heat exchanger, and the protective sleeve can effectively prevent the base tube from being deformed or damaged during the expansion operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall structure of the present invention when in use; Figure 3 It is a schematic diagram of the support plate structure of the present invention; Figure 4 It is a schematic diagram of the overall top view structure of the present invention; Figure 5 It is a schematic diagram of the overall side structure of the present invention; Figure 6 It is a schematic diagram of the internal structure of the positioning platform of the present invention; Figure 7 It is a schematic diagram of the structure of the driven gear of the present invention; Figure 8 A schematic diagram of the telescopic cylinder of the present invention when in use; Fig. 9 It is a side view schematic diagram of the structure of the present invention when in use; Among them, 1-fixed base, 2-rotating base, 3-positioning table, 4-working table, 5-limiting wall, 6-auxiliary plate, 7-limiting slide, 8-lifting rod, 9-servo motor, 10-power gear, 11-driven gear, 12-transmission chain, 13-support plate, 14-vertical slide, 15-positioning slider, 16-hydraulic telescopic cylinder, 17-limiting arm, 18-pushing table, 19-lateral slide, 20-telescopic cylinder, 21-protective plate, 22-expansion tube slide, 23-protective sleeve slide, 24-protective sleeve. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0016] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "back" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0017] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be an electrical connection; it can be a hydraulic oil circuit connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0018] See also Figures 1 to 9As shown, a fin heat exchanger tube expander comprises a fixed base 1, a rotating base 2, a positioning platform 3 and a workbench 4, wherein one end of the fixed base 1 is connected to a limiting wall 5, the fixed base 1 and the limiting wall 5 are in a vertical state, the cross-sections of the fixed base 1 and the limiting wall 5 are "L" shaped, and the rotating base 2 and the workbench 4 are both connected to the fixed base 1, the rotating base 2 is arranged at one end of the fixed base 1 away from the limiting wall 5, and the rotating base 2 rotates 180 degrees each time, the positioning platform 3 is arranged on the rotating base 2, and a hydraulic motor is arranged in the rotating base 2, and the output shaft of the hydraulic motor is connected to the positioning platform 3, so that the hydraulic motor can The positioning platform 3 can be driven to rotate, and an internal space is provided inside the positioning platform 3, an insertion interface is provided at one end of the positioning platform 3, the insertion interface is communicated with the internal space, and an auxiliary plate 6 is plugged into the insertion interface, and the cross section of the auxiliary plate 6 is "L"-shaped, and the auxiliary plate 6 can be pulled out or inserted into the internal space of the positioning platform 3 through the insertion interface of the positioning platform 3, and limited slideways 7 are provided on the side walls on both sides of the positioning platform 3, and lifting rods 8 are provided in the limited slideways 7, and bar teeth are provided on the lifting rods 8, and a support plate 13 is connected to the lifting rods 8, and the lifting rods 8 can move up and down in the limited slideways 7, thereby driving the support plate 13 to move up and down; Among them, a power structure is arranged in the limiting slide 7, and the power structure consists of a servo motor 9, a power gear 10, a driven gear 11 and a transmission chain 12, wherein the servo motor 9 is connected to the power gear 10, and there are at least two driven gears 11, and the power gear 10 and the driven gear 11 are both meshed and connected with the transmission chain 12, the power gear 10 is arranged at the starting end of the transmission chain 12, and the two driven gears 11 are arranged at the middle end and the end of the transmission chain 12. When the servo motor 9 is started, the driven gear 11 can be controlled to rotate through the cooperation of the power gear 10 and the transmission chain 12, and the driven gear 10 and the driven gear 11 are both meshed and connected with the bar teeth on the lifting rod 8. When the driven gear 11 and the power gear 10 rotate, the lifting rod 8 can move up and down in the limiting slide 7, and the lifting rod 8 can move up and down in the limiting slide 7. The supporting plate 13 is driven to rise or fall, and the two ends of the heat exchanger are placed on the supporting plate 13, so that the supporting plate 13 can drive the heat exchanger to rise or fall, and the transmission chain 12 is connected to the auxiliary plate 6, and the power gear 10 rotates to control the transmission chain 12. As it moves, the auxiliary plate 6 will follow the transmission chain 12 to move, so that the auxiliary plate 6 is pulled out or inserted from the internal space of the positioning platform 3. When the power structure controls the lifting rod 8 to rise, the transmission chain 12 will drive the auxiliary plate 6 to be pulled out from the internal space of the positioning platform 3, and when the power structure controls the lifting rod 8 to fall, the transmission chain 12 will drive the auxiliary plate 6 to be inserted into the internal space of the positioning platform 3, so that the auxiliary plate 6 pushes and calibrates the heat exchanger on the positioning platform 3 to ensure that the position and orientation of the heat exchanger on the positioning platform 3 are correct.

[0019] A vertical slide 14 is arranged on the limiting wall 5. The cross section of the vertical slide 14 is "T"-shaped. A positioning slider 15 is connected in the vertical slide 14. The positioning slider 15 can move up and down in the vertical slide 14. The lower end of the positioning slider 15 is connected to the workbench 4. The positioning slider 15 can make the workbench 4 only move up and down along the vertical slide 14, and a hydraulic telescopic cylinder 16 is arranged below the workbench 4. The hydraulic telescopic cylinder 16 is arranged in the fixed base 1. The hydraulic telescopic cylinder 16 can drive the workbench 4 to rise or fall. The moving trajectory of the workbench 4 is limited by the positioning slider 15 and the vertical slide 14 to avoid the workbench 4 from being offset. When the hydraulic telescopic cylinder 16 drives the workbench 4 to descend to the lowest point, the horizontal height of various components such as the positioning slider 15 on the workbench 4 is lower than the horizontal height of the positioning platform 3. When the rotating base 2 drives the positioning platform 3 to rotate, the positioning platform 3 is prevented from affecting the workbench 4.

[0020] A limit arm 17 is provided on the positioning slider 15, and the limit arm 17 is parallel to the positioning platform 3. A pushing platform 18 is provided on the limit arm 17, and the pushing platform 18 can move along the length direction of the limit arm 17. A first screw motor is provided on the workbench 4, and the slider of the first screw motor is connected to the pushing platform 18, so that the first screw motor can drive the pushing platform 18 to move, and a transverse slide 19 is provided on the pushing platform 18, and a second screw motor is provided in the transverse slide 19. A plurality of sliders are provided on the second screw motor, and each slider is provided with an electromagnetic clutch, and the combination and separation of the slider and the second screw motor are controlled by the electromagnetic clutch, so as to realize the individual control of the movement of each slider, and a hydraulic expansion structure is connected to each slider, and the slider can drive the hydraulic expansion structure to move along the transverse slide 19, and the pushing platform 18 can drive the hydraulic expansion structure to move along the length direction of the limit arm 17. The hydraulic expansion structure is composed of structures such as an expansion head and a transmission device, so that the heat exchanger can be expanded by the hydraulic expansion structure.

[0021] A telescopic cylinder 20 is also provided at the end of the limit arm 17, and a protective plate 21 is connected to the telescopic cylinder 20. The protective plate 21 is provided with a tube expansion slideway 22 and a protective sleeve slideway 23. The tube expansion slideway 22 is provided on a side close to the push platform 18. The tube expansion head of the hydraulic tube expansion structure can be inserted into the tube expansion slideway 22 and can move in the tube expansion slideway 22. The protective sleeve slideway 23 is provided on a side away from the push platform 18. A protective sleeve 24 is provided in the protective sleeve slideway 23. The protective sleeve 24 is a barrel-shaped structure. , and the protective sleeve 24 is arranged in the protective sleeve slideway 23, the protective sleeve 24 can move along the protective sleeve slideway 23, and the expansion head enters the protective sleeve 24 after passing through the center position of the protective sleeve 24, and the diameter of the protective sleeve slideway 23 is larger than the diameter of the expansion slideway 22, and the diameter of the protective sleeve 24 is also larger than the diameter of the expansion head. When the protective plate 21 drives the protective sleeve 24 to advance, the expansion head will not advance accordingly, and when the pushing platform drives the expansion head to advance, the protective sleeve 24 will not advance accordingly.

[0022] When in use, the supporting plate 13 is first raised by the power structure, and the auxiliary plate 6 is then pulled out from the inner space of the positioning platform 3, so that the auxiliary plate 6 moves away from the positioning platform 3, and then the heat exchanger is placed on the supporting plate 13 by a forklift, and then the supporting plate 13 is controlled to descend by the power structure, so that the heat exchanger falls on the positioning platform 3, and at the same time, the auxiliary plate 6 gradually moves toward the positioning platform 3, and the auxiliary plate 6 pushes the heat exchanger until the auxiliary plate 6 fits with the positioning platform 3, so that the heat exchanger fits with the auxiliary plate 6, and then the heat exchanger is placed on the supporting plate 13 by the forklift. The hydraulic telescopic cylinder 16 controls the workbench 4 to rise along the vertical slide 14 on the limit wall 5, and the workbench 4 rises to the height of the heat exchanger, and then controls the second screw motor and the electromagnetic clutch in the horizontal slide 19 to make the expansion head drive the protective sleeve 24 to move to the corresponding pipe position, and then controls the telescopic cylinder 20 to extend, so that the telescopic cylinder 20 drives the protective plate 21 to advance, so that the protective sleeve 24 is sleeved on the pipe body that needs to be expanded, and the protective plate 21 controls the protection sleeve 24 to advance, such as If the tube sheet of the heat exchanger is not attached to the side wall of the positioning platform 3, the protective sleeve 24 is sleeved on the tube body, and the tube body of the heat exchanger will contact the protective plate 21 in advance, so that the protective plate 21 pushes the heat exchanger to move on the positioning platform 3, so that the tube sheet of the heat exchanger is attached to the side wall of the positioning platform 3, so that the heat exchanger cannot move in the direction away from the protective sleeve 24, and then the pushing platform 18 is controlled to advance, so that the pushing platform drives the expansion head to advance into the tube body of the heat exchanger to perform the expansion operation. Through the setting of the protective sleeve 24, the diameter of the tube body can be effectively limited during the expansion operation to avoid rupture or damage of the tube body. After the expansion operation is completed, the pushing platform 18 and the protective plate 21 are controlled to retreat to the initial position, and the hydraulic telescopic cylinder 16 is controlled to reset, so that the workbench 4 is lowered to the initial position, and then the rotating base 2 is controlled to rotate, and then the above-mentioned expansion operation process is repeated, which can more effectively expand the tube bodies at both ends of the heat exchanger, and only one set of hydraulic expansion structure is needed, which reduces costs and is more efficient.

[0023] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A fin heat exchanger tube expander, comprising a fixed base, a rotating base, a positioning platform and a workbench, wherein one end of the fixed base is connected to a limiting wall, characterized in that: A vertical slide is arranged on the limit wall, and the cross section of the vertical slide is "T"-shaped. A positioning slider is connected in the vertical slide, and the positioning slider can move up and down in the vertical slide. The lower end of the positioning slider is connected to the workbench, and the workbench can only move up and down along the vertical slide through the positioning slider, and a hydraulic telescopic cylinder is arranged under the workbench, and the hydraulic telescopic cylinder is arranged in the fixed base. The hydraulic telescopic cylinder can drive the workbench to rise or fall, and the rotating base and the workbench are both connected to the fixed base, and the rotating base is arranged at one end of the fixed base away from the limit wall. A hydraulic motor is arranged in the rotating base, and when the hydraulic motor rotates, it can drive the positioning platform to rotate, and the rotating base rotates by 180° each time, and a hydraulic expansion tube structure is arranged on the workbench, and the finned heat exchanger can be expanded by the hydraulic expansion tube structure.

2. The fin heat exchanger tube expander according to claim 1, characterized in that: The positioning platform is provided with an internal space, and one end of the positioning platform is provided with an insertion interface, which is communicated with the internal space, and an auxiliary board is plugged into the insertion interface. The auxiliary board can be pulled out or inserted into the internal space of the positioning platform through the insertion interface of the positioning platform.

3. The fin heat exchanger tube expander according to claim 1, characterized in that: The side walls on both sides of the positioning platform are provided with limited slideways, and a power structure and a lifting rod are arranged in the limited slideways. The lifting rod is provided with bar teeth, which are connected to the power structure through the bar teeth, so that the power structure can drive the lifting rod to move, and the lifting rod is connected to a support plate.

4. The fin heat exchanger tube expander according to claim 3, characterized in that: The power structure comprises a servo motor, a power gear, a driven gear and a transmission chain, wherein the servo motor is connected to the power gear, there are at least two driven gears, and both the power gear and the driven gear are meshed and connected to the transmission chain.

5. The fin heat exchanger tube expander according to claim 1, characterized in that: A limit arm is arranged on the positioning slider, and the limit arm is parallel to the positioning platform. A pushing platform is arranged on the limit arm, and the pushing platform can move along the length direction of the limit arm. A first screw motor is arranged on the workbench, and the slider of the first screw motor is connected to the pushing platform, so that the first screw motor can drive the pushing platform to move.

6. The tube expander for fin heat exchanger according to claim 5, characterized in that: The pushing platform is provided with a transverse slide, a second screw motor is provided in the transverse slide, a plurality of sliders are provided on the second screw motor, each slider is provided with an electromagnetic clutch, and the combination and separation of the slider and the screw motor are controlled by the electromagnetic clutch, so as to realize the individual control of the movement of each slider, and a hydraulic expansion tube structure is connected to each slider, the slider can drive the hydraulic expansion tube structure to move along the transverse slide, and the pushing platform can drive the hydraulic expansion tube structure to move along the length direction of the limit arm.

7. The tube expander for fin heat exchanger according to claim 6, characterized in that: The end of the limit arm is also provided with a telescopic cylinder, which is connected to a protective plate, and the protective plate is provided with a tube expansion slide and a protective sleeve slide. The tube expansion head of the hydraulic tube expansion structure can be inserted into the tube expansion slide and can move in the tube expansion slide.

8. The tube expander for fin heat exchanger according to claim 7, characterized in that: A protective sleeve is arranged in the expansion slideway. The protective sleeve is a barrel-shaped structure and is arranged in the protective sleeve slideway. The protective sleeve can move along the protective sleeve slideway, and the expansion head penetrates the center position of the bottom wall of the protective sleeve and enters the protective sleeve.

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