A tube expander expansion rod adjustment structure

Abstract

The present invention discloses an expansion rod adjustment structure of a tube expander, comprising a frame, a power seat arranged on the frame and movable along the frame, an expansion rod fixing plate fixedly arranged on the power seat; a group of expansion rod mounting holes are arranged on the expansion rod fixing plate, and a retractable expansion rod is arranged in the expansion rod mounting holes; a group of baffles for shielding the expansion rod mounting holes are arranged on the back of the expansion rod fixing plate, and a baffle driving device for driving the baffles to move is also arranged. Through the action of the baffles, the present invention can control each expansion rod individually, and can realize automatic control, avoid manual adjustment, reduce the manual operation intensity and improve the safety of use, and can be widely used in the field of expansion rod adjustment of tube expanders.

Description

Technical Field

[0001] The invention relates to the field of tube expanders, and in particular to an expansion rod adjustment structure of a tube expander. Background Art

[0002] In the production process of heat exchangers, metal tubes and fins mounted thereon need to be tightly combined to ensure good heat transfer and heat conduction, and light weight and long service life. At present, in the assembly of heat exchangers, metal tubes and fins are first assembled together manually, and then expanded by a tube expander to achieve the fixation of metal tubes and fins. In order to meet the expansion requirements of different fins, Chinese patent application No. 201610790025.5 discloses an expansion rod extraction-free structure and a tube expansion machine, wherein the expansion rod extraction-free structure includes a power seat, a discharge seat and an expansion rod, an expansion rod clamping assembly is fixedly arranged on the discharge seat, and an expansion rod adjustment and fixing assembly is arranged on the power seat; the expansion rod clamping assembly includes a clamping ring fixing plate, a group of clamping ring mounting holes suitable for multiple groups of radiator expansion rods to pass through the clamping ring fixing plate, and the expansion rod passes through the clamping ring mounting holes; two clamping rings for holding the expansion rod are arranged in the mounting holes, and a damping ring for pressing the two clamping rings is also arranged; the expansion rod adjustment and fixing assembly includes an adjustment plate arranged on the power seat, and an expansion rod clearance hole is arranged on the adjustment plate. The present invention controls the expansion rod arranged on the tube expansion machine to work or not through the cooperation of the adjustment plate and the clamping ring, thereby realizing the rapid adjustment of the expansion rod to meet the expansion requirements of different heat exchangers. However, this structure requires manual replacement of the adjustment plate, cannot achieve automatic control, and has high labor costs. Summary of the invention

[0003] The purpose of the present invention is to provide an expansion rod adjustment structure for a tube expander, so as to solve the problem that the existing expansion rod adjustment structure cannot realize automatic control.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a tube expander expansion rod adjustment structure, including a frame, a power seat arranged on the frame and movable along the frame, an expansion rod fixing plate fixedly arranged on the power seat; a group of expansion rod mounting holes are arranged on the expansion rod fixing plate, and retractable expansion rods are arranged in the expansion rod mounting holes; a group of baffles for covering the expansion rod mounting holes are arranged on the back of the expansion rod fixing plate, and a baffle driving device for driving the baffles to move is also provided.

[0005] Furthermore, the baffle is against the back of the expansion rod fixing plate, and a baffle limiting plate is fixedly installed on the expansion rod fixing plate. The baffle limiting plate is provided with a group of guide grooves for limiting the moving direction of the baffle, and the guide grooves are provided with expansion rod giving holes.

[0006] Preferably, the baffle plate corresponds to the expansion rod mounting hole one by one, the baffle plate driving device is a baffle plate driving cylinder, and the movable end of the baffle plate driving cylinder is fixedly connected to the baffle plate.

[0007] In order to prevent the expansion rod from failing to return to its initial position and affecting the movable stroke of the baffle, an expansion rod position fine-tuning device is also provided on the frame. The expansion rod position fine-tuning device includes an adjustment plate that can move forward and backward along the axis of the expansion rod, and a group of retractable push rods corresponding to the expansion rod are provided on the adjustment plate.

[0008] Furthermore, the push rod includes a fixed rod fixedly connected to the adjustment plate, a sleeve rod sleeved on the fixed rod, and an ejection spring for ejecting the sleeve rod is sleeved on the fixed rod.

[0009] Beneficial effects of the present invention: The present invention uses a movable baffle to block the fixed end of the expansion rod, thereby achieving the fixation of one end of the expansion rod. When the expansion rod is not needed to work, the baffle can be controlled to move away from the rear end of the expansion rod by the baffle driving device. After moving away, when the expansion rod contacts the heat exchanger, it is forced to move backward, thereby not working on the heat exchanger. This structure can control the baffle driving device to drive the baffle to move through the automatic control system, so that there is no need for manual replacement and adjustment, reducing the intensity of operation, and can achieve precise control of each expansion rod with good reliability. In order to prevent the expansion rod from being unable to return to the initial position after retreating, thereby hindering the up and down movement of the baffle, an expansion rod position fine-tuning device is also provided, and the expansion rod is pushed into place by the adjustment plate and the retractable push rod, which is simple and convenient.

[0010] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0012] Figure 2 It is a cross-sectional view of the present invention.

[0013] Figure 3 for Figure 2 A partial enlarged view of middle A.

[0014] Figure 4 It is a schematic diagram of the structure of the push rod in the present invention.

[0015] Figure 5 It is a schematic diagram of the three-dimensional structure of the baffle limiting plate in the present invention. DETAILED DESCRIPTION

[0016] Examples, such as Figures 1 to 5As shown, a tube expander expansion rod adjustment structure includes a frame 1, a power base 2 arranged on the frame 1 and movable along the frame 1, an expansion rod fixing plate 3 is fixedly arranged on the power base 2, a group of expansion rod mounting holes 301 are arranged on the expansion rod fixing plate 3, a retractable expansion rod 4 is arranged in the expansion rod mounting hole 301, a boss 401 is arranged at the fixed end of the expansion rod 4, the expansion rod mounting hole 301 cooperates with the boss 401, and this structure allows the expansion rod 4 to shrink toward one end of the boss 401.

[0017] A group of baffles 5 for shielding the expansion rod mounting holes 301 are arranged on the back of the expansion rod fixing plate 3, and a baffle driving device 6 for driving the baffles 5 to move is also provided, and the baffles 5 correspond one-to-one to the expansion rod mounting holes 301. The expansion rods are arranged in two rows or four rows, and the expansion rods in two adjacent rows are staggered. The baffle driving device 6 is a baffle driving cylinder, and the movable end of the baffle driving cylinder is fixedly connected to the baffle 5. When there are two rows of expansion rods, the baffle driving cylinder can be arranged above or below the two rows of expansion rods. When there are four rows of expansion rods, the baffle driving cylinders are respectively arranged above and below the four rows of expansion rods, wherein the upper baffle driving cylinder corresponds to the upper two rows of expansion rods, and the lower baffle driving cylinder corresponds to the lower two rows of expansion rods. To ensure the accuracy of the movement of the baffle, the baffle 5 is against the back of the expansion rod fixing plate 3, and a baffle limiting plate 7 is also fixedly installed on the back of the expansion rod fixing plate 3. The baffle limiting plate 7 is provided with a group of guide grooves 701 that limit the movement direction of the baffle, so that the baffle can only move back and forth in the guide grooves 701. The depth of the guide grooves 701 is adapted to the thickness of the baffle 5, thereby preventing the baffle 5 from swinging in the thickness direction, ensuring that when the expansion rod is expanding the tube, the fixed end of the expansion rod is pressed tightly to provide sufficient support for the expansion tube. To ensure that after the baffle 5 leaves the fixed end of the expansion rod, the expansion rod can retract backwards and does not participate in the expansion tube, the guide groove 701 is provided with an expansion rod clearance hole 702. When expanding the tube, the baffle 5 at the rear end of the expansion rod is selected to move as needed, so that the rear end of the expansion rod that needs to be expanded blocks the end of the expansion rod through the baffle 5 to provide support for the expansion rod, and the baffle 5 at the rear end of the expansion rod that does not need to be expanded is retracted and does not act on the rear end of the expansion rod. When the front end of the expansion rod contacts the heat exchanger, it is forced to move backward and extend out of the expansion rod's clearance hole 702 and does not participate in the expansion of the tube.

[0018] In order to prevent the expansion rod 4 from being unable to return to the initial position after being ejected, thereby affecting the falling of the baffle 5, the frame 1 is also provided with an expansion rod position fine-tuning device, which includes an adjustment plate 8 that can move forward and backward along the axial direction of the expansion rod and an adjustment cylinder 10 that drives the adjustment plate 8 to move. The purpose of the forward and backward movement of the adjustment plate 8 is to leave enough movement for the expansion rod 4 to prevent the expansion rod 4 from pressing against the adjustment plate 8 when moving backward, thereby damaging the expansion rod or the heat exchanger. The adjustment plate 8 is provided with a group of retractable push rods 9 that correspond to the expansion rod 4 one by one.

[0019] The push rod 9 includes a fixed rod 901 fixedly connected to the adjustment plate 8, a sleeve rod 902 sleeved on the fixed rod 901, a limited end 903 is provided at one end of the fixed rod 901 that cooperates with the sleeve rod 902, a limited hole 904 that cooperates with the limited end 903 is provided in the sleeve rod 902, and an ejection spring 905 for ejecting the sleeve rod 902 is sleeved on the fixed rod 901. When the expansion tube is completed, the power seat 2 returns to the initial position, and then the adjustment plate 8 moves toward the expansion rod fixing plate 3 under the action of the adjustment cylinder 10. When the sleeve rod 902 passes through the expansion rod clearance hole 702 on the baffle limit plate 7, if there is an expansion rod staying in the expansion rod clearance hole 702, it can be pushed forward and moved out of the expansion rod clearance hole 702 under the action of the sleeve rod 902. The adjustment plate 8 continues to move forward. When a part of the push rod 9 contacts the baffle 5, the sleeve rod 902 retracts under the action of the ejection spring 905, so that the adjustment plate 8 can still move forward for a distance until the expansion rod 4 without the baffle 5 at the rear end of the expansion rod 4 is sent back to the initial installation position, that is, the boss 401 at the fixed end of the expansion rod falls back into the expansion rod installation hole 301. After completion, the adjustment plate 8 returns to the initial position under the action of the adjustment cylinder 10.

[0020] It should be pointed out that the expansion rod, baffle, baffle driving device and push rod in the figure are simplified, and only one or several of them are drawn as representatives, and not all of the above structures are drawn. The above is an exemplary description of the present invention in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. An expansion rod adjustment structure of a tube expander, comprising a frame (1), a power seat (2) arranged on the frame (1) and movable along the frame (1), an expansion rod fixing plate (3) being fixedly arranged on the power seat (2); characterized in that: The expansion rod fixing plate (3) is provided with a group of expansion rod mounting holes (301), and a retractable expansion rod (4) is provided in the expansion rod mounting holes (301). The back side of the expansion rod fixing plate (3) is provided with a group of baffles (5) for shielding the expansion rod mounting holes (301), and a baffle driving device (6) for driving the baffles (5) to move. The baffle plate (5) is against the back side of the expansion rod fixing plate (3), and a baffle plate limiting plate (7) is fixedly mounted on the expansion rod fixing plate (3). The baffle plate limiting plate (7) is provided with a group of guide grooves (701) for limiting the movement direction of the baffle plate, and the guide grooves (701) are provided with expansion rod clearance holes (702); The baffle plate (5) corresponds to the expansion rod mounting hole (301) one by one, the baffle plate driving device (6) is a baffle plate driving cylinder, and the movable end of the baffle plate driving cylinder is fixedly connected to the baffle plate (5); The frame (1) is also provided with an expansion rod position fine-tuning device, the expansion rod position fine-tuning device comprising an adjustment plate (8) that can move forward and backward along the axial direction of the expansion rod, and a group of retractable push rods (9) corresponding to the expansion rods are provided on the adjustment plate (8); The push rod (9) comprises a fixed rod (901) fixedly connected to the adjustment plate (8), a sleeve rod (902) sleeved on the fixed rod (901), and an ejection spring (905) sleeved on the fixed rod (901) for ejecting the sleeve rod (902).

Images