A reamer for a heat exchanger core

Abstract

The utility model relates to heat exchanger technical field especially relates to a reamer for heat exchanger core body, be used for the pipe body of heat exchanger core body is reamed, the reamer includes bottom plate, core body positioning assembly, reamer assembly and compacting assembly, core body positioning assembly with reamer assembly respectively movably set up in the both sides of bottom plate, and form work area between them, compacting assembly will heat exchanger core body be fixed in work area, core body positioning assembly positions one end of heat exchanger core body, be equipped with several flaring knives on reamer assembly, several flaring knives are inserted respectively in the pipe body of another end of heat exchanger core body, when reamer assembly moves towards core body positioning assembly, the flaring knife expands the pipe body of heat exchanger core body. Can expand all pipe body of heat exchanger at a time, guarantee the expansion degree of each pipe body is consistent.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, and in particular to a hole-expanding device for a heat exchanger core. Background Technology

[0002] After the heat exchanger core is completed, it needs to be connected to the cavity. The cavity has insertion holes; the heat exchanger core tubes are inserted into these holes, and adhesive is used for connection. The heat exchanger core tubes are typically flat tubes. To ensure a tighter fit between the tubes and the insertion holes, the tubes need to be expanded. A published Chinese patent, "A Hole Expanding Device for Heat Exchangers," publication number CN111715809A, discloses a conventional hole expanding method using a hole expanding machine. However, this requires expanding the hole one tube at a time, which is slow and may result in uneven expansion of each tube, causing problems during actual installation. Utility Model Content

[0003] In view of the above-mentioned shortcomings of conventional hole expansion methods, this utility model provides a hole expansion device for heat exchanger core, which can expand all tubes of the heat exchanger at one time and ensure that the expansion degree of each tube is consistent.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] According to one aspect of the present invention, a hole-expanding device for a heat exchanger core is provided for expanding the tube of the heat exchanger core. The hole-expanding device includes a base plate, a core positioning component, a hole-expanding component, and a clamping component. The core positioning component and the hole-expanding component are respectively movably disposed on both sides of the base plate, forming a working area therebetween. The clamping component fixes the heat exchanger core within the working area. The core positioning component positions one end of the heat exchanger core. The hole-expanding component is provided with a plurality of flaring blades, which are respectively inserted into the tube at the other end of the heat exchanger core. When the hole-expanding component moves toward the core positioning component, the flaring blades expand the tube of the heat exchanger core.

[0006] Optionally, the core positioning assembly includes a pressure rod, a connecting seat, a positioning plate, a connecting plate, a guide rod, and a slider. The guide rod is disposed on the base plate, the slider is slidably connected to the guide rod, the connecting plate is fixedly connected to the slider, the front end of the connecting plate is connected to the positioning plate, the rear end of the connecting plate is connected to the connecting seat, and the connecting seat is connected to the pressure rod.

[0007] Optionally, the positioning plate is provided with a positioning cavity, and the tube at one end of the heat exchanger core is disposed in the positioning cavity.

[0008] Optionally, the base plate is provided with a guide groove that cooperates with the guide rod.

[0009] Optionally, the flaring tool has a wedge-shaped structure.

[0010] Optionally, the reaming assembly includes a mounting bracket, a reaming plate, and an eccentric wheel. The reaming plate is provided with the reaming knife. The mounting bracket is fixedly mounted on the base plate. The eccentric wheel is connected to the mounting bracket. The rotation of the eccentric wheel causes the reaming plate to move closer to or away from the core positioning assembly.

[0011] Optionally, there are two eccentric wheels, which are respectively disposed at both ends of the mounting bracket. The two eccentric wheels are connected by a connecting rod to realize the linkage between the two eccentric wheels.

[0012] Optionally, the clamping assembly includes an elbow clamp and a fixing rod, the elbow clamp being connected to the fixing rod, the fixing rod extending from the front end to the rear end of the base plate for fixing the heat exchanger core.

[0013] Optionally, the core positioning assembly, the hole enlarging assembly, and the clamping assembly are modularly designed.

[0014] Optionally, the base plate is also provided with three pads, which are respectively located in the middle of the base plate, on the side near the core positioning component, and on the side near the hole expansion component, and the heat exchanger core is set on the three pads.

[0015] The advantages of this utility model are: the heat exchanger core is fixed by the core positioning component and the clamping component, and the entire tube of the heat exchanger core is enlarged at one time by the hole enlarging component, which greatly improves production efficiency; Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the hole-expanding device described in this utility model;

[0018] Figure 2 This is a schematic diagram of the core positioning component described in this utility model;

[0019] Figure 3 This is a schematic diagram of the hole-expanding assembly described in this utility model;

[0020] Figure 4This is a schematic diagram of the structure of the clamping assembly described in this utility model;

[0021] In the diagram: 1. Base plate; 11. Guide groove; 2. Core positioning assembly; 21. Pressure rod; 22. Connecting seat; 23. Positioning plate; 231. Positioning cavity; 24. Connecting plate; 25. Guide rod; 26. Slider; 3. Hole reaming assembly; 31. Mounting support; 32. Hole reaming plate; 321. Flaring cutter; 33. Eccentric wheel; 4. Clamping assembly; 41. Elbow clamp; 42. Fixing rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1

[0024] like Figures 1-4 As shown, a reaming device for a heat exchanger core is used to ream the tube of the heat exchanger core. The reaming device includes a base plate 1, a core positioning component 2, a reaming component 3, and a clamping component 4. The core positioning component 2 and the reaming component 3 are movably disposed on both sides of the base plate 1, forming a working area between them. The clamping component 4 fixes the heat exchanger core within the working area. The core positioning component 2 positions one end of the heat exchanger core. The reaming component 3 is provided with a plurality of flaring blades 321, which are inserted into the tube at the other end of the heat exchanger core. When the reaming component 3 moves toward the core positioning component 2, the flaring blades 321 expand the tube of the heat exchanger core.

[0025] Specifically, the heat exchanger core is composed of several tubes, with fins between each pair of adjacent tubes. After the heat exchanger core is completed, it needs to be connected to a cavity with an inlet and an outlet. This connection is achieved by creating insertion holes in the cavity, inserting each tube into the hole, and then applying adhesive. To ensure a tighter connection between the tubes and the insertion holes, the tubes need to be expanded. The expanding device for the heat exchanger core described in the above embodiment involves placing the heat exchanger core within the working area, with one end of the core abutting against the core positioning assembly 2. The expanding blades 321 of the expanding assembly are inserted one-to-one into the tubes at the other end of the heat exchanger core. The clamping assembly 4 fixes the heat exchanger core within the working area from top to bottom. Then, the expanding assembly 3 is moved, and the expanding blades 321 simultaneously expand the tubes.

[0026] Example 2

[0027] like Figures 1-4 As shown, a reaming device for a heat exchanger core is used to ream the tube of the heat exchanger core. The reaming device includes a base plate 1, a core positioning component 2, a reaming component 3, and a clamping component 4. The core positioning component 2 and the reaming component 3 are movably disposed on both sides of the base plate 1, forming a working area between them. The clamping component 4 fixes the heat exchanger core within the working area. The core positioning component 2 positions one end of the heat exchanger core. The reaming component 3 is provided with a plurality of flaring blades 321, which are inserted into the tube at the other end of the heat exchanger core. When the reaming component 3 moves toward the core positioning component 2, the flaring blades 321 expand the tube of the heat exchanger core.

[0028] Furthermore, the core positioning assembly 2 includes a pressure rod 21, a connecting seat 22, a positioning plate 23, a connecting plate 24, a guide rod 25, and a slider 26. The guide rod 25 is disposed on the base plate 1, the slider 26 is slidably connected to the guide rod 25, the connecting plate 24 is fixedly connected to the slider 26, the front end of the connecting plate 24 is connected to the positioning plate 23, the rear end of the connecting plate 24 is connected to the connecting seat 22, and the connecting seat 22 is connected to the pressure rod 21.

[0029] Furthermore, the positioning plate 23 is provided with a positioning cavity, and the tube at one end of the heat exchanger core is disposed in the positioning cavity.

[0030] Furthermore, the base plate 1 is provided with a guide groove 11, which cooperates with the guide rod 25.

[0031] Specifically, pressing the pressure rod 21 manually moves the positioning plate 23 via the connecting seat 22. The movement of the positioning plate 23 is achieved by the slider 26 sliding on the guide rod 25. After the heat exchanger core is placed in the working area, pressing the pressure rod 21 causes one end of the heat exchanger core to abut against the positioning plate 23, preventing displacement of the heat exchanger assembly when the hole expansion assembly 3 at the other end moves. The base plate 1 is provided with a guide groove 11 that cooperates with the guide rod 25. The relative positional relationship between the guide rod 25 and the guide groove 11 can be adjusted according to the width of the heat exchanger core to accommodate heat exchanger cores of different sizes.

[0032] Example 3

[0033] like Figures 1-4As shown, a reaming device for a heat exchanger core is used to ream the tube of the heat exchanger core. The reaming device includes a base plate 1, a core positioning component 2, a reaming component 3, and a clamping component 4. The core positioning component 2 and the reaming component 3 are movably disposed on both sides of the base plate 1, forming a working area between them. The clamping component 4 fixes the heat exchanger core within the working area. The core positioning component 2 positions one end of the heat exchanger core. The reaming component 3 is provided with a plurality of flaring blades 321, which are inserted into the tube at the other end of the heat exchanger core. When the reaming component 3 moves toward the core positioning component 2, the flaring blades 321 expand the tube of the heat exchanger core.

[0034] Furthermore, the flaring knife 321 has a wedge-shaped structure, with the top of the wedge-shaped structure being the narrowest part. Before flaring, the wedge-shaped structure is inserted into the tube body. During flaring, the wedge-shaped structure continuously extends into the tube body, and as the width of the wedge-shaped structure continuously increases, the flaring is achieved. The diameter of the tube body being flared is consistent with the width of the wedge-shaped structure.

[0035] Furthermore, the reaming assembly 3 includes a mounting support 31, a reaming plate 32, and an eccentric wheel 33. The reaming plate 32 is equipped with the flaring knife 321. The mounting support 31 is fixedly mounted on the base plate 1, and the eccentric wheel is connected to the mounting support 31. The rotation of the eccentric wheel causes the reaming plate 32 to move closer to or away from the core positioning assembly 2. The mounting support 31 is fixed on the base plate 1, serving as the basic support for the entire reaming assembly 3. The eccentric wheel is connected to the mounting support 31. When the eccentric wheel rotates, its eccentric characteristic generates different radial distance changes, thereby causing the connected reaming plate 32 to move closer to or away from the core positioning assembly 2. The flaring knife 321 mounted on the reaming plate 32 moves with the reaming plate 32, performing a reaming operation on the tube of the heat exchanger core. Through the design of the eccentric wheel, the reciprocating movement of the reaming plate 32 can be realized relatively easily and stably, thereby controlling the reaming action of the flaring knife 321.

[0036] Furthermore, there are two eccentric wheels, respectively located at both ends of the mounting bracket. The two eccentric wheels are connected by a connecting rod to achieve linkage between them. By setting two linked eccentric wheels, the force on the expanding plate during movement is more even. Compared to a single eccentric wheel, the coordinated work of two eccentric wheels can prevent the expanding plate from tilting or shifting due to uneven force, thereby ensuring that the flaring cutter mounted on the expanding plate can accurately expand the tubes of the heat exchanger core, effectively improving the accuracy and quality of the expanding operation. In addition, the linkage design enhances the stability of the expanding assembly, ensures the reliability of the expanding process, reduces equipment failures and maintenance frequency, and helps improve production efficiency.

[0037] Furthermore, the clamping assembly 4 includes an elbow clamp 41 and a fixing rod 42. The elbow clamp 41 is connected to the fixing rod 42, and the fixing rod 42 extends from the front end of the base plate 1 to the rear end for fixing the heat exchanger core.

[0038] Furthermore, the core positioning assembly 2, the hole enlarging assembly 3, and the clamping assembly 4 are modularly designed. This modular design allows for easier assembly of the core positioning assembly 2, the hole enlarging assembly 3, and the clamping assembly 4 onto the base plate 1.

[0039] Furthermore, the base plate is also provided with three pads, respectively located in the middle of the base plate, on the side near the core positioning assembly, and on the side near the hole enlarging assembly. The heat exchanger core is placed on the three pads. The three pads provide stable support for the heat exchanger core, ensuring that the heat exchanger core remains in a horizontal and stable state during the hole enlarging process, preventing it from shaking due to unstable placement, and ensuring the accuracy of the hole enlarging.

[0040] The device is small in size and light in weight, making it easy to handle manually and move between workstations. It also increases work efficiency by at least 2-3 times, significantly reducing labor intensity and product turnaround time.

[0041] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A device for expanding the bore of a heat exchanger core, used for expanding the bore of a heat exchanger core tube, characterized in that, The reaming device includes a base plate, a core positioning assembly, a reaming assembly, and a clamping assembly. The core positioning assembly and the reaming assembly are movably disposed on both sides of the base plate, forming a working area between them. The clamping assembly fixes the heat exchanger core within the working area. The core positioning assembly positions one end of the heat exchanger core. The reaming assembly is provided with a plurality of flaring blades, which are inserted into the tube body at the other end of the heat exchanger core. When the reaming assembly moves toward the core positioning assembly, the flaring blades expand the tube body of the heat exchanger core.

2. The hole-reaming device according to claim 1, characterized in that, The core positioning assembly includes a pressure rod, a connecting seat, a positioning plate, a connecting plate, a guide rod, and a slider. The guide rod is disposed on the base plate, the slider is slidably connected to the guide rod, the connecting plate is fixedly connected to the slider, the front end of the connecting plate is connected to the positioning plate, the rear end of the connecting plate is connected to the connecting seat, and the connecting seat is connected to the pressure rod.

3. The hole-reaming device according to claim 2, characterized in that, The positioning plate is provided with a positioning cavity, and the tube at one end of the heat exchanger core is disposed in the positioning cavity.

4. The hole-reaming device according to claim 2, characterized in that, The base plate is provided with a guide groove, which cooperates with the guide rod.

5. The hole-reaming device according to claim 1, characterized in that, The flaring tool has a wedge-shaped structure.

6. The hole-reaming device according to claim 1, characterized in that, The hole enlarging assembly includes a mounting bracket, an enlarging plate, and an eccentric wheel. The enlarging plate is provided with the flaring knife. The mounting bracket is fixedly mounted on the base plate. The eccentric wheel is connected to the mounting bracket. The rotation of the eccentric wheel causes the enlarging plate to move closer to or away from the core positioning assembly.

7. The hole-reaming device according to claim 6, characterized in that, There are two eccentric wheels, which are respectively set at both ends of the mounting bracket. The two eccentric wheels are connected by a connecting rod to realize the linkage between the two eccentric wheels.

8. The hole-reaming device according to claim 1, characterized in that, The clamping assembly includes an elbow clamp and a fixing rod. The elbow clamp is connected to the fixing rod, which extends from the front end to the rear end of the base plate and is used to fix the heat exchanger core.

9. The hole-reaming device according to claim 1, characterized in that, The core positioning component, the hole enlarging component, and the clamping component are modularly designed.

10. The hole-reaming device according to claim 1, characterized in that, The base plate is also provided with three pads, which are respectively located in the middle of the base plate, on the side near the core positioning component, and on the side near the hole expansion component. The heat exchanger core is set on the three pads.

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