A special tool for aircraft refueling connector maintenance cleaning and a maintenance method thereof

Abstract

The utility model provides a kind of special appliance for aircraft refueling connector overhaul cleaning, including refueling connector and the overhaul appliance for overhauling dismounting refueling connector, the overhaul appliance includes first overhaul assembly, second overhaul assembly and auxiliary overhaul assembly;The first overhaul assembly includes universal adapter and the first dismounting piece and second dismounting piece are arranged with universal adapter cooperation assembly;The second overhaul assembly includes combination roller and sleeve dismounting piece detachably connected with combination roller, and the auxiliary overhaul assembly includes auxiliary dismounting piece and positioning overhaul piece;The refueling connector overhaul tool provided by the utility model is overhauled by the customized improved overhaul assembly and auxiliary dismounting piece to adapt to the structure characteristics of refueling connector and carry out overhaul work, significantly improve the efficiency and equipment stability of aviation refueling head overhaul, realize the standardization, high efficiency and low loss of refueling connector overhaul work, improve operation efficiency, reduce artificial maintenance intensity.

Description

Technical Field

[0001] This invention belongs to the field of aircraft refueling connector maintenance technology, specifically relating to a special tool and method for cleaning and maintaining aircraft refueling connectors. Background Technology

[0002] In modern aviation, aviation refueling connectors are crucial equipment for replenishing aircraft fuel. They are typically installed at the end of refueling vehicles, connecting directly to the aircraft's refueling port to ensure the safe and rapid transfer of fuel to the aircraft's fuel tank. The HJS63A type aviation pressure refueling connector is one of the most technologically advanced underwing pressure refueling connectors currently available. It is compatible with ISO45 1980(E) international standard connectors and, through a pressure refueling system, can be used for refueling (or evacuating) operations on various aircraft, ships, and vehicles.

[0003] However, in actual operation, aircraft refueling heads face high-frequency usage environments, making their maintenance particularly important. Currently, problems persist in the maintenance of aircraft refueling connectors. For example, the lack of standardized maintenance procedures from different tool manufacturers leads to inconsistent tool usage on-site, resulting in inefficiency. The complex structure of the refueling connectors necessitates high compatibility of conventional tools during disassembly; either the tools are not fully compatible, or the disassembly operation is overly cumbersome, increasing manual maintenance intensity and repair time. These problems not only hinder the standardization of maintenance work but also potentially create safety hazards due to operational negligence. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a special tool for the inspection and cleaning of aircraft refueling connectors, so as to solve the existing problems.

[0006] This invention also provides a special tool and method for the inspection and cleaning of aircraft refueling connectors, which standardizes, improves efficiency and reduces wear and tear on refueling connector maintenance work, thereby increasing work efficiency and reducing the intensity of manual maintenance.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solution: a special tool for the inspection and cleaning of an aircraft refueling connector, comprising a refueling connector and an inspection tool for inspecting and disassembling the refueling connector, wherein the inspection tool comprises a first inspection component, a second inspection component, and an auxiliary inspection component.

[0009] The first maintenance assembly includes a universal connector, a first disassembly / assembly component, and a second disassembly / assembly component. The universal connector has a mating section at the top. The first disassembly / assembly component and the second disassembly / assembly component both include connecting rods of the same or different diameters. One end of the connecting rod has a connecting handle, and the other end has a connecting head. The first disassembly / assembly component and the second disassembly / assembly component are detachably connected through the mating section, and the bolts of the oil filler connector can be disassembled sequentially through the connecting head.

[0010] The second maintenance component includes a combined roller and a sleeve assembly / disassembly component. The sleeve assembly / disassembly component includes a sleeve shaft that is connected vertically. The top two sides of the sleeve shaft are provided with horizontally penetrating engagement holes. The combined roller and the sleeve assembly / disassembly component are detachably connected through the engagement holes. At least one positioning post is provided on the bottom of the sleeve shaft that extends axially. The positioning post is adapted to the valve nut of the oil filling connector.

[0011] The auxiliary maintenance component includes an auxiliary disassembly and assembly component and a positioning maintenance component. The auxiliary disassembly and assembly component includes an integrally connected disassembly and assembly head and a disassembly and assembly handle. The disassembly and assembly head cooperates with the connector head to perform disassembly and assembly operations. The positioning maintenance component is adapted to engage with the slot at the outlet of the refueling connector for maintenance of the refueling valve.

[0012] The refueling connector has an opening at the top and an outlet at the bottom. Its interior serves as a refueling channel and is equipped with a valve component with a lifting function to control the refueling operation of the refueling channel.

[0013] As a further improvement, the refueling connector includes a connecting seat, a pressure regulating valve, a handle seat and a connector body that are connected and fixed from top to bottom by screws. The connector body is provided with the valve component, and the bottom of the valve component is provided with a docking plate. The docking plate has a slot for engaging with the aircraft fuel tank.

[0014] As a further improvement, the mating section is provided with a groove that fits into the connecting handle for assembling the connecting handle.

[0015] As a further improvement, the combined roller includes a first rotating roller and a second rotating roller detachably connected to the first rotating roller. The first rotating roller is provided with a joint section, a connecting section and a ejector pin coaxially arranged in sequence. The second rotating roller is provided with a receiving groove adapted to the joint section, the connecting section and the ejector pin, and is detachably connected through the connecting section.

[0016] As a further improvement, the joining hole is adapted to the joining section, and the first rotating roller is assembled with the second rotating roller by sequentially passing through the joining holes on both sides of the sleeve shaft.

[0017] As a further improvement, the top of the disassembly head is provided with a hexagonal groove, the bottom of the hexagonal groove is provided with a positioning hole, and the bottom of the disassembly handle is provided with a hexagonal connecting post.

[0018] As a further improvement, the positioning and maintenance component includes an integrated positioning wrench and a grip sleeve fitted on the bottom of the positioning wrench, and the top of the positioning wrench is provided with an annular positioning protrusion that fits into the opening of the oil filler.

[0019] A maintenance method using specialized equipment for inspecting and cleaning aircraft refueling connectors, comprising the following steps:

[0020] Assembly step S1: Combine the universal connector with the first disassembly component to form maintenance component A or combine the universal connector with the second disassembly component to form maintenance component B; combine the combined roller with the sleeve disassembly component to form maintenance component C;

[0021] Inspection step S2: Using the inspection part B in step S1 and the auxiliary disassembly and assembly parts, disassemble the handle bolts on both sides of the aircraft refueling head and remove the handles; then loosen the bolts on the connecting seat and handle seat of the aircraft refueling head in sequence and remove the connecting seat and handle seat.

[0022] Inspection step S3: Use the specially designed hexagonal engagement post on the disassembly handle in the auxiliary disassembly and assembly parts to disassemble the bolts on the aircraft refueling head pressure regulator valve and remove the pressure regulator valve.

[0023] Inspection step S4: Use the inspection part B from step S1 to remove the fixing screws of the aircraft refueling head valve handle and remove the valve handle.

[0024] Inspection step S5: Disassemble the first and second rollers in the combined rollers, and use the ejector pin on the first roller to push out the fixing pin on the aircraft refueling head valve, and remove the valve nut and valve pin in sequence.

[0025] Inspection step S6: Use the inspection part A in step S1 to remove the fixing screws at the bottom of the aircraft refueling head, then use the inspection part B in step S1 to remove the fixing screws of the aircraft refueling head protective rubber sleeve, and then remove the stainless steel clip and rubber sleeve at the bottom of the aircraft refueling head in sequence.

[0026] Inspection step S7: Finally, manually remove the slot at the bottom of the aircraft refueling head valve and the internal valve components to complete the overall disassembly and inspect each component.

[0027] Reverse installation step S8: After the maintenance is completed, reset and install the aircraft refueling head components in reverse order according to steps S2-S7. Use the positioning maintenance parts to align with the slot at the bottom of the aircraft refueling head valve and check whether the valve component lifting function is normal.

[0028] (III) Beneficial Effects

[0029] The beneficial effects of this invention are: the refueling connector maintenance tool provided by this invention is adapted to the structural characteristics of the refueling connector for maintenance work, which significantly improves the efficiency and equipment stability of aviation refueling head maintenance. The maintenance process and tool design are optimized according to the structural characteristics of the refueling connector, and the synergy between tools is improved. Whether disassembled or combined, the utility can be found, realizing the standardization, high efficiency and low wear of refueling connector maintenance work, improving work efficiency and reducing the intensity of manual maintenance.

[0030] The first maintenance component serves as the first tool in the standardized maintenance process. By assembling different configurations of the first and second disassembly components and the universal connector, it removes most of the fixing screws on the oil filler connector, increases tool integration, and can work in conjunction with the auxiliary disassembly components for disassembly.

[0031] The second maintenance component serves as the second tool in the standardized maintenance process. Based on the combined design of the combination roller and the sleeve assembly, it is disassembled by rotating the sleeve assembly as the pivot and the combination roller as the lever during assembly, which improves tool integration and makes disassembly convenient and labor-saving. At the same time, the detachable design of the first and second rollers in the combination roller can be used to push out the fixing pin of the valve nut, increasing tool usability.

[0032] As the third tool in the standardized maintenance process, the auxiliary maintenance component is based on the structural features of the refueling connector. Through the customized and improved hexagonal connecting column and annular positioning protrusion on the auxiliary disassembly and assembly component, it solves the problem that traditional maintenance tools cannot directly disassemble the fixing screws on the curved pressure regulator valve and can perform maintenance on the refueling valve in advance without disassembling the entire structure. Attached Figure Description

[0033] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0034] Figure 1 This is a schematic diagram of the assembly and disassembly of the first maintenance component and the auxiliary disassembly component according to an embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram of the structure of the first disassembly / assembly component according to an embodiment of the present invention;

[0036] Figure 3 This is a schematic diagram of the combined structure of the first disassembly / assembly component and the universal connector according to an embodiment of the present invention;

[0037] Figure 4 This is a schematic diagram of the structure of a universal connector according to an embodiment of the present invention;

[0038] Figure 5 This is a schematic diagram of the assembly and disassembly of the combined roller and sleeve assembly according to an embodiment of the present invention;

[0039] Figure 6 This is a cross-sectional view of the combined roller according to an embodiment of the present invention;

[0040] Figure 7 This is a schematic diagram of the structure of the auxiliary assembly / disassembly component according to an embodiment of the present invention;

[0041] Figure 8 This is a schematic diagram of the positioning and maintenance component according to an embodiment of the present invention;

[0042] Figure 9 This is a schematic diagram of the structure of the aircraft refueling connector according to an embodiment of the present invention;

[0043] Figure 10 This is a schematic diagram illustrating the maintenance operation of the auxiliary disassembly and assembly components according to an embodiment of the present invention.

[0044] Figure 11 This is a schematic diagram of the maintenance operation of the first rotating roller according to an embodiment of the present invention;

[0045] Figure 12 This is a schematic diagram of the combined roller and sleeve assembly and disassembly components according to an embodiment of the present invention for combined maintenance. Figure 1 ;

[0046] Figure 13 This is a schematic diagram of the combined roller and sleeve assembly and disassembly components according to an embodiment of the present invention for combined maintenance. Figure 2 ;

[0047] Figure 14 This is a schematic diagram of the maintenance operation of the positioning and maintenance component according to an embodiment of the present invention.

[0048] Explanation of key figure labels:

[0049] 10. Universal connector; 101. Mating section; 102. Groove;

[0050] 11. First assembly / disassembly component; 111. Connecting rod; 112. Connecting handle; 113. Connecting head;

[0051] 12. Second disassembly / assembly component;

[0052] 20. Combined roller; 201. First rotating roller; 202. Second rotating roller; 203. Joining section; 204. Connecting section; 205. Ejector pin; 206. Receiving groove;

[0053] 21. Sleeve assembly / disassembly parts; 211. Sleeve shaft; 212. Connecting hole; 213. Positioning pin;

[0054] 30. Auxiliary disassembly / assembly parts; 301. Disassembly / assembly head; 302. Disassembly / assembly handle; 303. Hexagonal slot; 304. Positioning hole; 305. Hexagonal engagement post;

[0055] 40. Positioning and maintenance parts; 401. Positioning wrench; 402. Grip sleeve; 403. Circular positioning protrusion.

[0056] 50. Valve component; 51. Connector seat; 52. Pressure regulating valve; 53. Connector body; 54. Connecting plate; 55. Handle seat. Detailed Implementation

[0057] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0058] A special tool for inspecting and cleaning aircraft refueling connectors according to an embodiment of the present invention.

[0059] Example

[0060] like Figure 1-9 As shown, a special tool for the maintenance and cleaning of an aircraft refueling connector according to an embodiment of the present invention will be described in detail. The tool includes a refueling connector and a maintenance tool for the maintenance and disassembly of the refueling connector. The maintenance tool includes a first maintenance component, a second maintenance component, and an auxiliary maintenance component. The maintenance tool is based on the structural characteristics of the refueling connector and a standardized refueling head maintenance process is customized.

[0061] The first maintenance assembly includes a universal connector 10 and a first disassembly component 11 and a second disassembly component 12 that are assembled and configured in conjunction with the universal connector 10. The universal connector 10 has a mating section 101 on its top, and the first disassembly component 11 and the second disassembly component 12 are detachably connected to the universal connector 10 through the mating section 101.

[0062] The second maintenance component includes a combined roller 20 and a sleeve disassembly component 21 detachably connected to the combined roller 20. The auxiliary maintenance component includes an auxiliary disassembly component 30 and a positioning maintenance component 40, which respectively cooperate with the first maintenance component or the second maintenance component to perform disassembly and assembly operations.

[0063] The refueling connector has an opening at the top and an outlet at the bottom. Its interior serves as a refueling channel and is equipped with a valve component 50 with a lifting function to control the refueling channel for refueling operations. The universal connector 10 cooperates with the first disassembly component 11 or the second disassembly component 12 to disassemble the refueling connector component in sequence. The positioning and maintenance component 40 is engaged with the refueling connector outlet and is used to inspect the valve lifting function, including but not limited to lifting tests and maintenance components. The positioning and maintenance component 40 can be used for pre-inspection, eliminating the need for tedious disassembly and maintenance work.

[0064] It should be noted that the detachable connection mentioned in this application includes, but is not limited to, any one of threaded connection, snap-fit, nested connection, and socket connection that can be understood by those skilled in the art, and the components in this application can also be assembled by any of the above connection methods.

[0065] Please see Figure 9 As shown, the refueling connector includes a connecting seat 51, a pressure regulating valve 52, a handle seat 55, and a connector body 53, which are connected and fixed from top to bottom by screws or bolts. The handle seat 55 is fixed to the outside of the connector body by screws or bolts. The connector body 53 is provided with the valve component 50. The bottom of the valve component 50 is provided with a docking plate 54. The docking plate 54 is fixed to the bottom of the connector body by several screws and is protected and fixed by a rubber sleeve to prevent the docking plate 54 from shaking or deviating. The docking plate 54 has a slot for docking and engaging with the aircraft fuel tank refueling seat. The slot is adapted to the flange on the aircraft refueling seat.

[0066] It should be noted that the valve component 50 includes a valve pin located inside the main body. One end of the valve pin protrudes from the connector body and is rotatably equipped with a valve handle, and is fixed to the connector body by a valve nut. The other end of the valve pin is located inside the main body and is rotatably equipped with a connecting rod. The end of the connecting rod is equipped with a refueling valve. The refueling valve is equipped with a valve seat that can rotate relative to the connector body. The valve seat is also equipped with a groove that matches the flange on the aircraft refueling seat. During installation, the docking plate 54 is located below the valve seat, and the grooves of the two are corresponding. The refueling seat is inserted into the groove on the upper valve seat through the groove of the lower docking plate 54. The operator can rotate the valve handle to drive the valve pin to rotate, thereby driving the connecting rod to rise and fall inside the connector body, thereby opening or closing the refueling valve.

[0067] When docking with the aircraft for refueling, align the slots of the docking plate 54 and the valve seat with the flange of the aircraft refueling seat. Then, hold the handle on the handle seat and rotate the refueling connector. Through the locking action, the valve seat on the upper layer rotates relative to the refueling seat, causing the slot of the valve seat to rotate into the protrusion of the docking plate. This, in turn, causes the refueling head flange, which is locked in the slot of the valve seat, to also rotate into the protrusion of the docking plate, thus restricting and fixing the refueling seat. Then, by holding the valve handle, drive the refueling valve to rise and carry out the refueling operation.

[0068] Please see Figure 1-2As shown, both the first disassembly component 11 and the second disassembly component 12 include connecting rods 111 with the same or different diameters. That is, the first disassembly component 11 and the second disassembly component 12 can be equipped with connecting rods 111 of the same or different diameters according to the operator's design requirements, so as to adapt to the standardized disassembly process of the fuel filler head. The connecting rods 111 of the first disassembly component 11 and the second disassembly component 12 are provided with a connecting handle 112 at one end and a connecting head 113 at the other end. In this embodiment, according to the actual maintenance needs of the fuel filler head, it is preferable to provide two first disassembly components 11 and one second disassembly component 12, and both can be detachably connected to the universal connector 10. The detachability not only facilitates storage, but also improves the adaptability of the universal connector 10, making it more in line with the standardized maintenance process.

[0069] Please see Figure 1 , Figure 3 As shown, for ease of assembly, the first disassembly component 11 and the second disassembly component 12 in this embodiment are respectively snapped into the universal connector 10. That is, the snapping creates an axial limiting force on the first disassembly component 11 or the second disassembly component 12, making it easy to rotate and disassemble the bolt on the filler head. Specifically, the mating section 101 of the universal connector 10 is provided with a groove 102 that fits into the connecting handle 112. In use, the connecting handle 112 is aligned with the groove 102 and snapped in, improving convenience.

[0070] Please see Figure 3-4 As shown, the connecting handle 112 of the first disassembly component 11 and the second disassembly component 12 are hexagonal socket handles of the same specification. The corresponding groove 102 is a hexagonal slot that fits and engages with the hexagonal socket handle. In other words, the first disassembly component 11 and the second disassembly component 12 can be quickly switched through the engagement of the hexagonal socket handle and the hexagonal slot. In some preferred embodiments, a magnetic attraction method can also be used to enable the first disassembly component 11, the second disassembly component 12 and the universal connector 10 to be quickly positioned and assembled. Alternatively, the universal connector 10 can be preferably a ratchet wrench to make the assembly steps more convenient and faster.

[0071] In order to better adapt to the disassembly process of the aircraft refueling head, in this embodiment, the connector 113 of the first disassembly component 11 is a hexagonal sleeve, and the connector 113 of the second disassembly component 12 is a hexagonal ball head. Since the bottom of the aircraft refueling connector is fixed to the valve component slot by six 8mm fixing screws, the connector 113 of the first disassembly component 11 is preferably an 8mm hexagonal sleeve. The fixing bolts of the other components of the aircraft refueling connector are 3mm or 5mm hexagonal bolts. Therefore, the connector 113 of the two second disassembly components 12 is preferably a 3mm hexagonal ball head and a 5mm hexagonal ball head, respectively.

[0072] Please see Figure 5-6 As shown, the combined roller 20 includes a first roller 201 and a second roller 202 detachably connected to the first roller 201. Specifically, the first roller 201 is coaxially provided with a connecting section 203, a connecting section 204, and a ejector pin 205 in sequence. The diameter of the connecting section 204 is relatively smaller than that of the first roller 201. The diameter of the ejector pin 205 is adapted to the fixing pin of the aircraft refueling connector valve handle. The second roller 202, corresponding to the first roller 201, is provided with a receiving groove 206 adapted to the connecting section 203, the connecting section 204, and the ejector pin 205. That is, the receiving groove 206 can accommodate the connecting section 203, the connecting section 204, and the ejector pin 205. The connecting section 204 and the ejector pin 205 are connected to each other inside the connecting section 204. The first rotating roller 201 and the second rotating roller 202 are detachably connected through the connecting section 204. The connection method is preferably a threaded connection. Specifically, the connecting section 204 is provided with an external thread, and the inner wall of the receiving groove 206 corresponding to the receiving section 204 is provided with an internal thread that is threadedly connected to the external thread of the connecting section 204. At least a part of the connecting section 203 is received in the receiving groove 206, and the remaining part serves as a support shaft that is detachably connected to the sleeve disassembly component 21. The operator can use the support shaft as a pivot to rotate the sleeve disassembly component 21 to achieve the effect of disassembling the aircraft refueling head component.

[0073] Please see Figure 5 , Figure 12 , Figure 13 As shown, the sleeve assembly / disassembly component 21 includes a sleeve shaft 211 that is vertically connected, meaning that the sleeve shaft 211 has a cavity that is vertically connected. At the same time, the top two sides of the sleeve shaft 211 are provided with horizontally connected engagement holes 212, which transversely connect the cavity of the sleeve shaft 211. The bottom of the sleeve shaft 211 is provided with at least one positioning post 213 extending axially. Since the valve nut on the aircraft refueling connector has four evenly arranged positioning holes for disassembly, in this embodiment, the positioning post 213 is preferably two, symmetrically arranged and adapted to the positioning holes on the aircraft refueling head valve nut.

[0074] Please see Figure 5-6As shown, in order to better assemble the combined roller 20 and the sleeve assembly 21, the engagement hole 212 is adapted to the engagement section 203, that is, the engagement section 203 can fit through the engagement hole 212. Since the sleeve shaft 211 has a through cavity, the first roller 201 will sequentially pass through the engagement holes 212 on both sides of the sleeve shaft 211 and assemble with the second roller 202. The assembly steps are as follows: pick up the first roller 201 and align it with the engagement hole 212 on the sleeve shaft 211, so that the ejector pin 205, connecting section 204 and engagement section 203 of the first roller 201 successively pass through the engagement holes 212 on both sides. At this time, the sleeve shaft 211 is adapted to be positioned on the engagement section 203 through the engagement hole 212. Then, rotate the second roller 202, and the first roller 201 and the second roller 202 are firmly assembled together through the threaded engagement section 203.

[0075] Please see Figure 1 , Figure 7 , Figure 10 As shown, the auxiliary disassembly / assembly component 30 includes an integrally connected disassembly / assembly head 301 and disassembly / assembly handle 302. The top of the disassembly / assembly head 301 has a hexagonal groove 303, which corresponds to the bolt size of the aircraft refueling head fixing handle. A positioning hole 304 is provided below the hexagonal groove 303. The positioning hole 304 can be customized to any shape, including but not limited to triangle, rectangle, and hexagon, according to the disassembly requirements of specific maintenance components. In this embodiment, the positioning hole 304 is square. To further improve disassembly adaptability and based on the need to improve the speed of standardized maintenance, a hexagonal engagement post 305 is provided at the bottom of the disassembly / assembly handle 302 along the axial direction perpendicular to the disassembly / assembly handle 302. The hexagonal engagement post 305 can be used to disassemble the bolts on the aircraft refueling connector pressure regulator valve. Since the pressure regulator valve has an overall curvature during disassembly, it cannot be directly disassembled using the first maintenance component. However, the additional specially customized positioning hole 304 and hexagonal engagement post 305 make the disassembly process more convenient and faster.

[0076] Please see Figure 8 , Figure 14As shown, the positioning and maintenance component 40 includes an integrated positioning wrench 401 and a grip sleeve 402 fitted onto the bottom of the positioning wrench 401. Specifically, the positioning wrench 401 includes a handle-shaped grip section at the bottom and an annular positioning section at the top. The size of the positioning section is the same as the inner diameter of the filler nozzle opening (valve), allowing the two to engage. Furthermore, the positioning section has an annular positioning protrusion 403 that engages with the groove at the filler nozzle opening (valve). In other words, the annular positioning protrusion 403 has a hollowed-out circular hole at its center, which is connected to the filler nozzle opening (valve). The valve component at the opening (valve) is adapted to allow the valve component to extend through the circular hole when adjusting or maintaining it. Maintenance personnel can then perform regular maintenance on the valve component (including but not limited to replacing the valve component, sealing ring, and protective rubber sleeve on the valve component). The annular positioning protrusion 403 extends axially and has several locking blocks extending radially at its extended end. These blocks are used to rotate the positioning wrench 401 so that it can be locked in the slot at the filling head opening (valve) and will not fall off. This is then used to inspect the lifting or damage of the valve component.

[0077] A maintenance method according to an embodiment of the present invention

[0078] A maintenance method using the aforementioned specialized equipment for inspecting and cleaning aircraft refueling connectors, comprising the following steps:

[0079] Combination step S1: as follows Figure 2-3 As shown, the universal connector 10 is combined with the first disassembly and assembly part 11 to form maintenance part A, or the universal connector 10 is combined with the second disassembly and assembly part 12 to form maintenance part B; the combined roller 20 is combined with the sleeve disassembly and assembly part 21 to form maintenance part C.

[0080] like Figure 2 As shown, in this embodiment, the universal connector 10 is preferably a ratchet wrench when it is inspected and disassembled, the connector 113 on one of the first disassembly parts 11 is preferably an 8mm hexagonal socket, and the connectors 113 on the two second disassembly parts 12 are preferably 3mm hexagonal ball heads and 5mm hexagonal ball heads, respectively.

[0081] That is, the repair part A is: combination ① ratchet wrench + 8mm hex socket;

[0082] The repair part B is: combination ① ratchet wrench + 3mm hexagonal ball head; combination ② ratchet wrench + 5mm hexagonal ball head;

[0083] Inspection step S2: such as Figure 1As shown, using combination ② in the maintenance component B in step S1, in conjunction with the hexagonal groove 303 at the top of the disassembly head 301 in the auxiliary disassembly component 30, combination ② is used to rotate and disassemble one side of the internal hexagonal bolt, and the hexagonal groove 303 of the auxiliary disassembly component 30 is used to fix the bolt on the other side. The two work together to disassemble the handle bolts on both sides of the aircraft refueling head and remove the handles; then, using combination ② in the maintenance component B in step S1, the bolts on the connecting seat and the handle seat of the aircraft refueling head are loosened in sequence, and the connecting seat and the handle seat are removed.

[0084] Inspection step S3: such as Figure 10 As shown, the special hexagonal connecting post 305 on the disassembly handle 302 in the auxiliary disassembly and assembly part 30 is used to disassemble the bolts on the aircraft refueling head pressure regulator valve one by one, and remove the pressure regulator valve.

[0085] Inspection step S4: Use the combination ② in inspection part B in step S1 to remove the fixing screws of the aircraft refueling head valve handle and remove the valve handle;

[0086] Inspection step S5: such as Figure 11 As shown, the first roller 201 and the second roller 202 in the combined roller 20 are separated, and the fixing pin on the aircraft refueling head valve is pushed out by the ejector pin 205 on the first roller 201, as shown. Figure 12-13 As shown, the first roller 201 and the second roller 202 are then assembled into a combined roller 20, which is then combined with the sleeve disassembly and assembly parts 21. The positioning pin 213 is inserted into the positioning hole on the valve nut, and then the valve nut and valve pin are removed by rotating in sequence.

[0087] Inspection step S6: Use combination ① in inspection part A in step S1 to remove the 6 8mm fixing screws at the bottom of the aircraft refueling head. Then use combination ① in inspection part B in step S1 to remove the fixing screws of the protective rubber sleeve of the aircraft refueling head and remove the protective rubber sleeve fitted at the bottom of the refueling connector valve. Then use combination ① or ② in inspection part B in step S1 to remove the fixing screws between the stainless steel card and the rubber sleeve at the bottom of the aircraft refueling head and remove the stainless steel card and the rubber sleeve in sequence.

[0088] Inspection step S7: Finally, manually remove the slot at the bottom of the aircraft refueling head valve and the internal valve components to complete the overall disassembly and inspect each component.

[0089] Reverse installation step S8: After maintenance, reinstall the aircraft refueling head components in reverse order according to steps S2-S7, such as... Figure 14 As shown, the positioning and maintenance component 40 is aligned with the slot at the bottom of the aircraft refueling head valve, and the positioning wrench 401 is rotated so that it can be locked in the slot at the refueling head opening (valve) and will not fall off. Then, the valve handle is rotated to check whether the valve component lifting function is normal.

[0090] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0091] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A special tool for inspecting and cleaning an aircraft refueling connector, comprising a refueling connector and an inspection tool for inspecting and disassembling the refueling connector, characterized in that, The maintenance equipment includes a first maintenance component, a second maintenance component, and an auxiliary maintenance component; The first maintenance assembly includes a universal connector (10), a first disassembly / assembly component (11), and a second disassembly / assembly component (12). The universal connector (10) has a mating section (101) at the top. The first disassembly / assembly component (11) and the second disassembly / assembly component (12) both include connecting rods (111) with the same or different diameters. One end of the connecting rod (111) is provided with a connecting handle (112), and the other end is provided with a connector (113). The first disassembly / assembly component (11) and the second disassembly / assembly component (12) are detachably connected through the mating section (101), and the bolts of the oil filler connector are disassembled sequentially through the connector (113). The second maintenance assembly includes a combined roller (20) and a sleeve assembly (21). The sleeve assembly (21) includes a sleeve shaft (211) that is connected vertically. The top two sides of the sleeve shaft (211) are provided with horizontally penetrating engagement holes (212). The combined roller (20) and the sleeve assembly (21) are detachably connected through the engagement holes (212). At least one positioning post (213) is provided on the bottom of the sleeve shaft (211) extending axially. The positioning post (213) is adapted to the valve nut of the oil filling connector. The auxiliary maintenance component includes an auxiliary disassembly and assembly component (30) and a positioning maintenance component (40). The auxiliary disassembly and assembly component (30) includes an integrally connected disassembly and assembly head (301) and disassembly and assembly handle (302). The disassembly and assembly head (301) cooperates with the connector (113) to perform disassembly and assembly operations. The positioning maintenance component (40) is adapted to and engaged with the slot of the refueling connector outlet for maintenance of the refueling valve. The refueling connector has an opening at the top and an outlet at the bottom, and its interior serves as a refueling channel and is equipped with a valve component (50) with a lifting function to control the refueling operation of the refueling channel.

2. The special tool for inspecting and cleaning aircraft refueling connectors according to claim 1, characterized in that: The refueling connector includes a connecting seat (51), a pressure regulating valve (52), a handle seat (55), and a connector body (53) that are connected and fixed from top to bottom by screws. The connector body (53) is provided with the valve component (50). The bottom of the valve component (50) is provided with a docking plate (54). The docking plate (54) has a slot for engaging with the aircraft fuel tank.

3. The special tool for inspecting and cleaning aircraft refueling connectors according to claim 1, characterized in that: The mating section (101) is provided with a groove (102) that fits into the connecting handle (112) for assembling the connecting handle (112).

4. The special tool for inspecting and cleaning aircraft refueling connectors according to claim 1, characterized in that: The combined roller (20) includes a first roller (201) and a second roller (202) detachably connected to the first roller (201). The first roller (201) is coaxially provided with a joint section (203), a connecting section (204) and a ejector pin (205) in sequence. The second roller (202) is provided with a receiving groove (206) that is adapted to the joint section (203), the connecting section (204) and the ejector pin (205), and is detachably connected through the connecting section (204).

5. A special tool for inspecting and cleaning aircraft refueling connectors according to claim 4, characterized in that: The joining hole (212) is adapted to the joining section (203), and the first roller (201) is assembled with the second roller (202) by passing through the joining holes (212) on both sides of the sleeve shaft (211).

6. The special tool for inspecting and cleaning aircraft refueling connectors according to claim 1, characterized in that: The top of the disassembly head (301) is provided with a hexagonal groove (303), and a positioning hole (304) is provided below the hexagonal groove (303). The bottom of the disassembly handle (302) is provided with a hexagonal connecting post (305).

7. The special tool for inspecting and cleaning aircraft refueling connectors according to claim 1, characterized in that: The positioning and maintenance component (40) includes an integral positioning wrench (401) and a grip sleeve (402) fitted on the bottom of the positioning wrench (401). The top of the positioning wrench (401) is provided with an annular positioning protrusion (403) that fits into the opening of the oil filler.

8. A maintenance method using the special equipment for inspecting and cleaning aircraft refueling connectors as described in any one of claims 1-7, the method comprising the following steps: Assembly step S1: Combine the universal connector (10) with the first disassembly and assembly part (11) to form maintenance part A or combine the universal connector (10) with the second disassembly and assembly part (12) to form maintenance part B; combine the combined roller (20) with the sleeve disassembly and assembly part (21) to form maintenance part C; Inspection step S2: Using the inspection part B in step S1 in conjunction with the auxiliary disassembly part (30), disassemble the handle bolts on both sides of the aircraft refueling head and remove the handles; then loosen the bolts on the connecting seat (51) and the handle seat (55) of the aircraft refueling head in sequence and remove the connecting seat (51) and the handle seat (55). Inspection step S3: Use the specially made hexagonal connecting post (305) on the disassembly handle (302) in the auxiliary disassembly part (30) to disassemble the bolt on the aircraft refueling head pressure regulator valve (52) and remove the pressure regulator valve (52). Inspection step S4: Use the inspection part B from step S1 to remove the fixing screws of the aircraft refueling head valve handle and remove the valve handle. Inspection step S5: Disassemble the first roller (201) and the second roller (202) in the combined roller (20), and push out the fixing pin on the aircraft refueling head valve through the ejector pin (205) on the first roller (201), and remove the valve nut and valve pin in sequence; Inspection step S6: Use the inspection part A in step S1 to remove the fixing screws at the bottom of the aircraft refueling head, then use the inspection part B in step S1 to remove the fixing screws of the aircraft refueling head protective rubber sleeve, and then remove the stainless steel clip and rubber sleeve at the bottom of the aircraft refueling head in sequence. Inspection step S7: Finally, manually remove the slot at the bottom of the aircraft refueling head valve and the internal valve component (50) to complete the overall disassembly and inspect each component. Reverse installation step S8: After the maintenance is completed, reset and install the components of the aircraft refueling head in reverse order according to steps S2-S7. Use the positioning maintenance part (40) to align with the slot at the bottom of the aircraft refueling head valve and check whether the lifting function of the valve component (50) is normal.

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