Maintenance and core replacement tool for heat exchanger of aircraft air conditioning system

Abstract

The utility model relates to the technical field of airplane spare and accessory part maintenance, in particular to a heat exchanger maintenance and core replacement tool of an airplane air conditioning system, which comprises a first supporting structure, a second supporting structure and a core replacement structure, the first supporting structure is constructed into a plate-shaped structure, at least one first cutting groove is arranged on the surface of the first supporting structure, and a first pivoting structure and a second pivoting structure are respectively arranged at two ends of the first supporting structure; the first end of each supporting column is connected to the first supporting structure. According to the core replacing tool, the first supporting structure and the second supporting structure are each provided with a large-area cutting groove, meanwhile, the tool can rotate, and a user can conveniently cut and weld a heat exchanger shell located in a positioning space from the upper direction, the lower direction, the front direction and the rear direction; and positioning pins for positioning the outer contour of the heat exchanger shell are arranged on the first supporting structure and the second supporting structure, so that the position of the shell can be positioned, and the reduction precision of the outer contour of a maintained product is ensured.

Description

Technical Field

[0001] This utility model relates to the field of aircraft parts repair technology, and more specifically to a tooling for repairing and replacing heat exchangers in aircraft air conditioning systems. Background Technology

[0002] The heat exchangers in the existing air conditioning systems for civil aircraft reduce their heat exchange efficiency after a certain period of use and can no longer meet the functional requirements of the air conditioning system. Therefore, it is necessary to overhaul the heat exchangers and perform core replacement work, which means replacing all the heat exchanger cores in the heat exchanger. In this process, it is necessary to cut the outer shell of the heat exchanger so that the old heat exchanger cores can be removed from the cutting groove and then the new heat exchanger cores can be inserted.

[0003] Current core replacement tooling is complex to disassemble and requires repeated disassembly and reassembly. In particular, inaccurate positioning can prevent the heat exchanger from being installed correctly on the aircraft. The welding process cannot be rotated properly, resulting in welding that cannot be completed in one step and requires repeated welding. This leads to low work efficiency. Therefore, there is an urgent need for a tooling that is easy to disassemble, accurate in positioning, and highly efficient. Utility Model Content

[0004] To address the technical problems existing in heat exchanger maintenance in the prior art, this utility model proposes a tooling for heat exchanger maintenance and core replacement in aircraft air conditioning systems, comprising:

[0005] The first support structure is constructed as a plate-like structure with at least one first cutting groove on its surface. The two ends of the first support structure are respectively provided with a first pivot structure and a second pivot structure.

[0006] Multiple support columns, each of which has a first end connected to the first support structure;

[0007] A second support structure is connected to the second end of the support column. The second support structure is constructed as a plate-like structure, and the surface of the second support structure is provided with at least one second cutting groove.

[0008] The first support structure has a plurality of first positioning holes around the first cutting groove on its surface, and the second support structure has a plurality of second positioning holes around the second cutting groove on its surface. Positioning pins are detachably connected to the first and second positioning holes.

[0009] A positioning space for accommodating the heat exchanger is formed between the first support structure and the second support structure, and the size of the first or second cutting groove corresponds to the size of the heat exchanger plate core. The positioning pin is installed from the side of the first or second support structure away from the positioning space into the first or second positioning hole to position the heat exchanger in the positioning space.

[0010] Preferably, the positioning pin is threadedly connected to the first positioning hole or the second positioning hole, and the positioning pin can be inserted into the first positioning hole or the second positioning hole and abut against the shell surface of the heat exchanger.

[0011] Preferably, at least three support columns are connected between the first support structure and the second support structure. Along the length direction of the second cutting groove, the distance between two adjacent support columns is greater than the length of the second cutting groove, and along the width direction of the second cutting groove, the distance between two adjacent support columns is greater than the width of the second cutting groove.

[0012] Preferably, the top of the support column is provided with a connecting column, and a stepped structure is formed between the connecting column and the support column. The second support structure is connected to the stepped structure, and a fixing cap is threaded onto the connecting column.

[0013] Preferably, the second cutting groove is rectangular, and a plurality of the second positioning holes are distributed around the second cutting groove.

[0014] Preferably, the first support structure is provided with a plurality of first cutting grooves, and adjacent first cutting grooves are separated by reinforcing ribs, and the size of the first cutting groove is smaller than the size of the second cutting groove.

[0015] Preferably, the second cutting groove is provided with first positioning holes around its perimeter and on the reinforcing rib.

[0016] Preferably, the first support structure is provided with a support plate, and the support plate is provided with a flange on the side facing the positioning space.

[0017] Preferably, the second pivoting structure includes a support plate and a coupling.

[0018] Preferably, the axes of the first pivot structure and the second pivot structure coincide.

[0019] Compared with the prior art, the advantages of this utility model are:

[0020] The core replacement fixture proposed in this application forms a positioning space for accommodating the heat exchanger between the first support structure and the second support structure. Both the first support structure and the second support structure are provided with large-area cutting grooves. At the same time, the fixture can rotate, which is conducive to the user cutting and welding the heat exchanger shell in the positioning space from four directions: top, bottom, front, and back. The first support structure and the second support structure are provided with positioning pins for positioning the outer contour of the heat exchanger shell, which can position the shell and more accurately restore the position of the shell that needs to be spliced ​​after being divided during welding, ensuring the accuracy of the restoration of the outer contour of the product after repair. Attached Figure Description

[0021] The accompanying drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component shown in the various figures may be denoted by the same reference numeral. For clarity, not every component is labeled in each figure. Embodiments of various aspects of the present invention will now be described by way of example and with reference to the accompanying drawings, wherein:

[0022] Figure 1 This is a schematic diagram of the structure of the heat exchanger maintenance and core replacement tooling for the aircraft air conditioning system shown in this utility model.

[0023] Figure 2 This is a schematic diagram of the first support structure shown in this utility model. Detailed Implementation

[0024] To better understand the technical content of this utility model, specific embodiments are provided below in conjunction with the accompanying drawings.

[0025] Combination Figure 1 As shown, this utility model proposes a tooling for repairing and replacing the heat exchanger core of an aircraft air conditioning system, including a first support structure 10, multiple support columns 20 and a second support structure 30.

[0026] The first support structure 10 is constructed as a plate structure with at least one first cutting groove 101 on its surface. The first support structure 10 is provided with a support plate 14, and the support plate 14 is provided with a flange 141 on the side facing the positioning space.

[0027] Thus, the heat exchanger can be placed on the first support structure 10 and supported by the first support structure 10. At the same time, the inlet and outlet flanges of the heat exchanger can be connected to the flange 141 on the support plate 14 to position the heat exchanger.

[0028] In an optional embodiment, the first support structure 10 is provided with a plurality of first cutting grooves 101, and adjacent first cutting grooves 101 are separated by reinforcing ribs 13.

[0029] Specifically, such as Figure 2 As shown, the first support structure 10 is provided with four first cutting grooves 101, and a cross-shaped reinforcing rib 13 is formed between the four first cutting grooves 101. The multiple first cutting grooves 101 can make the heat exchanger have a larger exposed area, so that the shell of the heat exchanger can be cut and welded through the first cutting grooves 101.

[0030] Furthermore, the first end of each of the plurality of support columns 20 is connected to the first support structure 10, and the second support structure 30 is connected to the second end of the support column 20. The second support structure 30 is constructed as a plate-like structure, and the surface of the second support structure 30 is provided with at least one second cutting groove 301.

[0031] Furthermore, a positioning space for accommodating the heat exchanger is formed between the first support structure 10 and the second support structure 30, and the size of the first cutting groove 101 or the second cutting groove 301 corresponds to the size of the heat exchanger plate core.

[0032] Thus, after the heat exchanger is installed onto the flange 141 of the first support structure 10, the heat exchanger is fixed, and then the second support structure 30 is installed onto the support column 20, so that a positioning space for the heat exchanger is formed between the first support structure 10 and the second support structure 30.

[0033] The surface of the first support structure 10 is provided with a plurality of first positioning holes 41 around the first cutting groove 101, and the surface of the second support structure 30 is provided with a plurality of second positioning holes 42 around the second cutting groove 301. Positioning pins 40 are detachably connected to the first positioning holes 41 and the second positioning holes 42.

[0034] Furthermore, the positioning pin 40 is installed from the side of the first support structure 10 or the second support structure 30 away from the positioning space into the first positioning hole 41 or the second positioning hole 42 to position the heat exchanger in the positioning space.

[0035] Specifically, multiple positioning pins 40 are used to pass through the first positioning hole 41 and the second positioning hole 42, so that the ends of the positioning pins 40 abut against the housing. Since the housing is divided during cutting, if it cannot be repositioned to its original position during welding, it cannot be installed into the aircraft's air conditioning system. Therefore, it is crucial to completely restore each part of the housing after welding.

[0036] Combination Figure 1 As shown, the second cutting groove 301 is set as a rectangle, the size of the first cutting groove 101 is smaller than the size of the second cutting groove 301, and it is also set as a rectangle. Multiple second positioning holes 42 are distributed around the second cutting groove 301, and multiple first positioning holes 41 are distributed around the second cutting groove 301 and on the reinforcing rib 13.

[0037] In this way, the heat exchanger core in the cut heat exchanger can be removed from the second cutting groove 301 for replacement.

[0038] In an optional embodiment, the first support structure 10 is provided with a first pivot structure 11 and a second pivot structure 12 at its two ends.

[0039] Specifically, the first pivot structure 11 and the second pivot structure 12 can be connected to the support structure and the drive structure, so that the tooling as a whole can rotate, which is beneficial for users to cut, weld and install the positioning pin 40 on the heat exchanger shell from multiple angles.

[0040] In an optional embodiment, the second pivoting structure 12 includes a support plate 121 and a coupling 122. The first pivoting structure 11 can be connected to a bearing structure, and the coupling 122 can be connected to a drive motor, so that when the drive motor rotates, the tooling is rotated to a predetermined angle.

[0041] Preferably, the axes of the first pivot structure 11 and the second pivot structure 12 coincide. This ensures that when the tooling rotates, either the first support structure 10 or the second support structure 30 has the opportunity to face upwards or to the side, which is advantageous for workers to maintain the heat exchanger.

[0042] Preferably, the positioning pin 40 is threadedly connected to the first positioning hole 41 or the second positioning hole 42, and the positioning pin 40 can be inserted into the first positioning hole 41 or the second positioning hole 42 and abut against the housing surface of the heat exchanger.

[0043] Specifically, based on the shape of the heat exchanger, a positioning pin 40 is first installed in the first positioning hole 41 of the first support structure 10 at a position with a special shape relative to the heat exchanger shell, so that the positioning pin 40 abuts against the shell. Then, a positioning pin 40 is installed in the second positioning hole 42 of the second support structure 30 at a position with a special shape relative to the heat exchanger shell, so that the positioning pin 40 abuts against the shell. In this way, when the shell is cut and then welded, the segmented shell parts can be better restored and positioned.

[0044] In an optional embodiment, at least three support columns 20 are connected between the first support structure 10 and the second support structure 30. Along the length direction of the second cutting groove 301, the distance between two adjacent support columns 20 is greater than the length of the second cutting groove 301. Along the width direction of the second cutting groove 301, the distance between two adjacent support columns 20 is greater than the width of the second cutting groove 301.

[0045] Combination Figure 2 As shown, the first support structure 10 and the second support structure 30 are connected by four support columns 20. The four support columns 20 are distributed in a rectangle and are located at the four corners of the second cutting groove 301. Along the length and width of the second cutting groove 301, the distance between the two pairs of support columns 20 is greater than the length and width of the second cutting groove 301, so as not to interfere with the replacement of the heat exchanger plate core.

[0046] Specifically, the top of the support column 20 is provided with a connecting column 201, and a stepped structure is formed between the connecting column 201 and the support column 20. The second support structure 30 is connected to the stepped structure, and a fixing cap 21 is threaded onto the connecting column 201.

[0047] Thus, by removing the fixing cap 21, the second support structure 30 can be removed from or installed from the connecting post 201.

[0048] In conjunction with the above embodiments, the core replacement fixture proposed in this application forms a positioning space for accommodating the heat exchanger between the first support structure and the second support structure. Both the first support structure and the second support structure are provided with large-area cutting grooves. At the same time, the fixture can rotate, which is beneficial for the user to cut and weld the heat exchanger shell in the positioning space from four directions: top, bottom, front, and back. The first support structure and the second support structure are provided with positioning pins for positioning the outer contour of the heat exchanger shell, which can position the shell. During welding, the position of the shell that needs to be spliced ​​after being divided can be restored more accurately, ensuring the restoration accuracy of the outer contour of the product after repair.

[0049] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this invention shall be determined by the claims.

Claims

1. A tooling for repairing and replacing the heat exchanger core of an aircraft air conditioning system, characterized in that, include: The first support structure (10) is constructed as a plate-like structure, and at least one first cutting groove (101) is provided on its surface. The two ends of the first support structure (10) are respectively provided with a first pivot structure (11) and a second pivot structure (12). Multiple support columns (20), each of the support columns (20) having its first end connected to the first support structure (10); A second support structure (30) is connected to the second end of the support column (20). The second support structure (30) is constructed as a plate structure, and the surface of the second support structure (30) is provided with at least one second cutting groove (301). The surface of the first support structure (10) is provided with a plurality of first positioning holes (41) around the first cutting groove (101), and the surface of the second support structure (30) is provided with a plurality of second positioning holes (42) around the second cutting groove (301). Positioning pins (40) are detachably connected to the first positioning holes (41) and the second positioning holes (42). A positioning space for accommodating the heat exchanger is formed between the first support structure (10) and the second support structure (30), and the size of the first cutting groove (101) or the second cutting groove (301) corresponds to the size of the heat exchanger plate core. The positioning pin (40) is installed from the side of the first support structure (10) or the second support structure (30) away from the positioning space into the first positioning hole (41) or the second positioning hole (42) to position the heat exchanger in the positioning space.

2. The heat exchanger repair and core replacement fixture for an aircraft air conditioning system according to claim 1, characterized in that, The positioning pin (40) is threadedly connected to the first positioning hole (41) or the second positioning hole (42). The positioning pin (40) can be inserted into the first positioning hole (41) or the second positioning hole (42) and abut against the shell surface of the heat exchanger.

3. The heat exchanger repair and core replacement fixture for an aircraft air conditioning system according to claim 1, characterized in that, At least three support columns (20) are connected between the first support structure (10) and the second support structure (30). Along the length direction of the second cutting groove (301), the distance between two adjacent support columns (20) is greater than the length of the second cutting groove (301). Along the width direction of the second cutting groove (301), the distance between two adjacent support columns (20) is greater than the width of the second cutting groove (301).

4. The heat exchanger repair and core replacement fixture for an aircraft air conditioning system according to claim 1, characterized in that, The top of the support column (20) is provided with a connecting column (201), and a stepped structure is formed between the connecting column (201) and the support column (20). The second support structure (30) is connected to the stepped structure, and a fixing cap (21) is threaded onto the connecting column (201).

5. The heat exchanger repair and core replacement fixture for an aircraft air conditioning system according to claim 1, characterized in that, The second cutting groove (301) is set to a rectangle, and a plurality of the second positioning holes (42) are distributed around the second cutting groove (301).

6. The heat exchanger repair and core replacement fixture for an aircraft air conditioning system according to claim 1, characterized in that, The first support structure (10) is provided with a plurality of first cutting grooves (101), and adjacent first cutting grooves (101) are separated by reinforcing ribs (13). The size of the first cutting groove (101) is smaller than the size of the second cutting groove (301).

7. The heat exchanger repair and core replacement fixture for an aircraft air conditioning system according to claim 6, characterized in that, The second cutting groove (301) is provided with first positioning holes (41) around its perimeter and on the reinforcing rib (13).

8. The heat exchanger repair and core replacement fixture for an aircraft air conditioning system according to claim 1, characterized in that, The first support structure (10) is provided with a support plate (14), and the support plate (14) is provided with a flange (141) on one side facing the positioning space.

9. The heat exchanger repair and core replacement fixture for an aircraft air conditioning system according to claim 1, characterized in that, The second pivot structure (12) includes a support plate (121) and a coupling (122).

10. The heat exchanger repair and core replacement fixture for an aircraft air conditioning system according to claim 1, characterized in that, The axes of the first pivot structure (11) and the second pivot structure (12) coincide.

Images