Special appliance for overhauling and cleaning aircraft refueling connector and overhauling method thereof

Abstract

A special device for overhauling and cleaning an aircraft refueling connector comprises the refueling connector and an overhauling device used for overhauling and disassembling the refueling connector, and the overhauling device comprises a first overhauling assembly, a second overhauling assembly and an auxiliary overhauling assembly; the first maintenance assembly comprises a universal adapter, and a first disassembly and assembly part and a second disassembly and assembly part which are assembled with the universal adapter in a matched manner; the second overhauling assembly comprises a combined roller and a sleeve dismounting part detachably connected with the combined roller, and the auxiliary overhauling assembly comprises an auxiliary dismounting part and a positioning overhauling part; according to the overhauling tool for the refueling joint, the overhauling assembly and the auxiliary disassembly and assembly which are improved in a customized mode are used for adapting to the structural characteristics of the refueling joint to conduct overhauling work, the overhauling efficiency of the aviation refueling joint and the equipment stability are remarkably improved, standardization, high efficiency and low loss of the overhauling work of the refueling joint are achieved, and the operation efficiency is improved; the manual maintenance intensity is reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of aircraft refueling connector maintenance, and particularly relates to a special tool for aircraft refueling connector maintenance and cleaning and a maintenance method thereof. BACKGROUND

[0002] In the field of modern aviation, the aviation refueling connector is a key equipment for refueling aircraft. It is usually installed at the end of a refueling vehicle and directly connected with the aircraft fuel port to ensure safe and rapid fuel transmission to the aircraft fuel tank. The HJS63A aviation pressure refueling connector in the prior art is one of the most advanced aircraft underwing pressure refueling connectors in terms of structural design. It can be connected with the IS045 1980(E) international standard connector seat and used for refueling (oil pumping) operations of various aircraft, ships and vehicles through the pressure refueling system.

[0003] However, in actual operation, the aviation refueling connector needs to face a high-frequency use environment, so its maintenance work is particularly important. However, there are still problems in the maintenance and repair operation of the aircraft refueling connector. For example, the refueling connector maintenance processes of different manufacturers of maintenance tools lack unified standards, resulting in various types of maintenance tools used on site, which is low in efficiency; the complex structural characteristics of the refueling connector make the adaptability of conventional tools to the disassembly process high, or the tools cannot completely match, or the disassembly operation is too cumbersome, increasing the manual maintenance intensity and maintenance time. These problems not only affect the standardization of the maintenance work, but also may cause safety hazards due to negligence. SUMMARY

[0004] (I) Technical problems to be solved In view of the above problems in the prior art, the present application aims to provide a special tool for aircraft refueling connector maintenance and cleaning to solve the existing problems.

[0005] The present application also provides a special tool for aircraft refueling connector maintenance and cleaning and a maintenance method thereof, which realizes the standardization, high efficiency and low loss of the refueling connector maintenance work, improves the operation efficiency and reduces the manual maintenance intensity. (II) Technical solutions In order to achieve the above purpose, the present application is realized by the following technical solutions: a special tool for aircraft refueling connector maintenance and cleaning, comprising a refueling connector and a maintenance tool for disassembling and maintaining the refueling connector, the maintenance tool comprising a first maintenance assembly, a second maintenance assembly and an auxiliary maintenance assembly; The first maintenance assembly comprises a universal adapter, a first disassembling part and a second disassembling part, the universal adapter is provided with a matching section at the top, the first and second disassembling parts each comprise a connecting rod with the same or different diameters, one end of the connecting rod is provided with a connecting handle, and the other end is provided with a connecting head, the first and second disassembling parts are detachably connected through the matching section, and the bolts of the oil filling connector are sequentially disassembled through the connecting head; The second maintenance assembly comprises a combined roller and a sleeve disassembling part, the sleeve disassembling part comprises a sleeve shaft in communication between the upper and lower parts, the sleeve shaft is provided with engaging holes at both sides of the top part and extending horizontally, the combined roller and the sleeve disassembling part are detachably connected through the engaging holes, at least one positioning column is provided on the sleeve shaft and extends axially at the bottom part, and the positioning column is matched with the oil filling connector valve nut; The auxiliary maintenance assembly comprises an auxiliary disassembling part and a positioning maintenance part, the auxiliary disassembling part comprises a disassembling head and a disassembling handle which are integrally connected, the disassembling head is matched with the connecting head to perform disassembling operation, and the positioning maintenance part is matched with the clamping groove of the oil filling connector outlet to perform maintenance on the oil filling valve. The oil filling connector is provided with an opening and an outlet at the top and the bottom respectively, the inside thereof serves as an oil filling channel and is provided with a valve part with a jacking function, and the valve part is used to control the oil filling operation of the oil filling channel.

[0006] As a further improvement, the oil filling connector comprises a connecting seat, a pressure stabilizing valve, a handle seat and a connector main body which are sequentially fixed by screws from top to bottom, the connector main body is provided with the valve part, the valve part is provided with a docking disc at the bottom, and the docking disc is provided with a clamping groove matched with the docking of the aircraft fuel tank.

[0007] As a further improvement, the matching section is provided with a groove matched with the connecting handle to assemble the connecting handle.

[0008] As a further improvement, the combined roller comprises a first rotating roller and a second rotating roller detachably connected with the first rotating roller, the first rotating roller is sequentially provided with a matching section, a connecting section and a thimble coaxially, the second rotating roller is provided with a containing groove matched with the matching section, the connecting section and the thimble, and the second rotating roller is detachably connected through the connecting section.

[0009] As a further improvement, the engaging holes are matched with the matching section, and the first rotating roller sequentially penetrates the engaging holes at both sides of the sleeve shaft and the second rotating roller to be assembled.

[0010] As a further improvement, a hexagonal groove is provided at the top end of the disassembling head, a positioning hole is provided below the hexagonal groove, and a hexagonal engaging column is provided at the bottom of the disassembling handle.

[0011] As a further improvement, the positioning maintenance piece comprises an integrated positioning wrench and a holding sleeve arranged at the bottom of the positioning wrench, and the top of the positioning wrench is provided with an annular positioning protrusion matched with the opening of the refueling head.

[0012] A maintenance method using a special tool for maintenance and cleaning of an aircraft refueling connector, comprising the following steps: Combination step S1: combine the universal adapter with the first disassembling piece into maintenance piece A or combine the universal adapter with the second disassembling piece into maintenance piece B; combine the combination roller with the sleeve disassembling piece into maintenance piece C; Maintenance step S2: use the maintenance piece B in step S1 to cooperate with the auxiliary disassembling piece to correspondingly disassemble the handle bolt on both sides of the aircraft refueling head, and remove the handle; then loosen the bolts on the connecting seat and the handle seat of the aircraft refueling head in turn, and remove the connecting seat and the handle seat; Maintenance step S3: use the special hexagonal joint column on the disassembling handle in the auxiliary disassembling piece to correspondingly disassemble the bolt on the pressure stabilizing valve of the aircraft refueling head, and remove the pressure stabilizing valve; Maintenance step S4: use the maintenance piece B in step S1 to disassemble the fixing screw of the aircraft refueling head valve handle, and remove the valve handle; Maintenance step S5: disassemble the first rotating roller and the second rotating roller in the combination roller, and use the thimble on the first rotating roller to push out the fixed pin on the aircraft refueling head valve, and remove the valve nut and the valve pin in turn; Maintenance step S6: use the maintenance piece A in step S1 to disassemble the fixing screw at the bottom of the aircraft refueling head, then use the maintenance piece B in step S1 to disassemble the fixing screw of the protective rubber sleeve of the aircraft refueling head, and then disassemble the stainless steel card and the rubber sleeve at the bottom of the aircraft refueling head in turn; Maintenance step S7: finally manually remove the clamping groove at the bottom of the aircraft refueling head valve and the internal valve components, so as to complete the overall disassembly and maintenance of each component; Reverse installation step S8: after the maintenance is completed, install each component of the aircraft refueling head in reverse order according to steps S2-S7, use the positioning maintenance piece to align the clamping groove at the bottom of the aircraft refueling head valve, and check whether the valve component lifting function is normal.

[0013] (Three) beneficial effects The beneficial effects of the present application are: the refueling connector maintenance tool provided by the present application is adapted to the structure characteristics of the refueling connector for maintenance work, which significantly improves the efficiency and equipment stability of the aircraft refueling head maintenance, optimizes the maintenance process and maintenance tool design according to the structure characteristics of the refueling connector, integrates and improves the synergy between tools, and can find utility whether disassembled or combined, realizes the standardization, high efficiency and low loss of the refueling connector maintenance work, improves the operation efficiency, and reduces the artificial maintenance intensity, wherein; The first maintenance assembly is the first tool in the standardized maintenance process, and through assembly of the first disassembling part, the second disassembling part and the universal adapter, most of the fixed screws on the refueling connector are disassembled, the tool integration is increased, and the disassembly can be cooperated with the auxiliary disassembling part; The second maintenance assembly is the second tool in the standardized maintenance process, and based on the combined roller and the sleeve disassembling part, through rotation of the sleeve disassembling part as the pivot and the combined roller as the rotating lever, the tool integration is improved, the disassembly is facilitated and labor-saving, and meanwhile, the first rotating roller and the second rotating roller in the combined roller can be disassembled to push out the fixed pin of the valve nut, and the tool utilization is increased. The auxiliary maintenance assembly is the third tool in the standardized maintenance process, and based on the structural features of the refueling connector, through the hexagonal joint column and the annular positioning protrusion on the auxiliary disassembling part and the customized improvement of the positioning maintenance part, the fixed screws on the pressure stabilizing valve with an arc cannot be directly disassembled by the traditional maintenance tool, and the refueling valve can be maintained in advance without disassembling the overall structure. BRIEF DESCRIPTION OF DRAWINGS

[0014] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, made with reference to the following drawings: Figure 1 The combined disassembly schematic diagram of the first maintenance assembly and the auxiliary disassembling part of the embodiment of the present application; Figure 2 The structural schematic diagram of the first disassembling part of the embodiment of the present application; Figure 3 The combined structural schematic diagram of the first disassembling part and the universal adapter of the embodiment of the present application; Figure 4 The structural schematic diagram of the universal adapter of the embodiment of the present application; Figure 5 The disassembly schematic diagram of the combined roller and the sleeve disassembling part of the embodiment of the present application; Figure 6 The sectional view of the combined roller of the embodiment of the present application; Figure 7 The structural schematic diagram of the auxiliary disassembling part of the embodiment of the present application; Figure 8 The structural schematic diagram of the positioning maintenance part of the embodiment of the present application; Figure 9 The structural schematic diagram of the aircraft refueling connector of the embodiment of the present application; Figure 10 The maintenance operation schematic diagram of the auxiliary disassembling part of the embodiment of the present application.

[0015] Figure 11This is a schematic diagram of the maintenance operation of the first rotating roller according to an embodiment of the present invention; 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 ; 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 ; 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.

[0016] Explanation of key figure labels: 10. Universal connector; 101. Mating section; 102. Groove; 11. First assembly / disassembly component; 111. Connecting rod; 112. Connecting handle; 113. Connecting head; 12. Second disassembly / assembly component; 20. Combined roller; 201. First rotating roller; 202. Second rotating roller; 203. Joining section; 204. Connecting section; 205. Ejector pin; 206. Receiving groove; 21. Sleeve assembly / disassembly parts; 211. Sleeve shaft; 212. Connecting hole; 213. Positioning pin; 30. Auxiliary disassembly / assembly parts; 301. Disassembly / assembly head; 302. Disassembly / assembly handle; 303. Hexagonal slot; 304. Positioning hole; 305. Hexagonal engagement post; 40. Positioning and maintenance parts; 401. Positioning wrench; 402. Grip sleeve; 403. Circular positioning protrusion.

[0017] 50. Valve component; 51. Connector seat; 52. Pressure regulating valve; 53. Connector body; 54. Connecting plate; 55. Handle seat. Detailed Implementation

[0018] 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.

[0019] A special tool for inspecting and cleaning aircraft refueling connectors according to an embodiment of the present invention. Example like Figures 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. The first maintenance assembly comprises a universal adapter 10, and a first disassembling part 11 and a second disassembling part 12 assembled with the universal adapter 10, wherein the universal adapter 10 is provided with a matching section 101 at the top, and the first disassembling part 11 and the second disassembling part 12 are detachably connected with the universal adapter 10 through the matching section 101; The second maintenance assembly comprises a combination roller 20 and a sleeve disassembling part 21 detachably connected with the combination roller 20, and the auxiliary maintenance assembly comprises an auxiliary disassembling part 30 and a positioning maintenance part 40, which are respectively matched with the first maintenance assembly or the second maintenance assembly to perform disassembling work; The oiling connector is provided with an opening and an outlet at the top and the bottom, respectively, and the inside thereof serves as an oiling channel and is provided with a valve part 50 having a jacking function, which is used to control the oiling channel to perform oiling work, the universal adapter 10 is matched with the first disassembling part 11 or the second disassembling part 12 to sequentially disassemble the oiling connector part, and the positioning maintenance part 40 is matched with the outlet of the oiling connector to be clamped, which is used to maintain the jacking function of the valve, including but not limited to jacking test, maintenance part, etc., and the positioning maintenance part 40 can be used for pre-maintenance without going through complicated maintenance disassembling work.

[0020] It should be understood that the detachable connection mentioned in the present application includes but is not limited to any one of the thread connection, clamping, nesting connection, and sleeve connection that can be understood by those skilled in the art, and the parts in the present application can also be assembled by any one of the above connection methods.

[0021] Please refer to Figure 9 As shown in the figure, the oiling connector comprises a connecting seat 51, a pressure stabilizing valve 52, a handle seat 55, and a connector main body 53 fixed in sequence from top to bottom by screws or bolts, the handle seat 55 is fixed and connected to the outside of the connector main body by screws or bolts, wherein the connector main body 53 is provided with the valve part 50, the bottom of the valve part 50 is provided with a butt joint disc 54, the butt joint disc 54 is fixed to the bottom of the connector main body by a plurality of screws and is externally provided with a rubber sleeve for protection and fixation to prevent the butt joint disc 54 from shaking and deviating, and the butt joint disc 54 has a clamping groove matched with the butt joint of the oiling seat of the aircraft fuel tank, which is matched with the flange on the aircraft fueling seat; It needs to be known that the valve part 50 comprises a valve pin arranged inside the body, one end of the valve pin protrudes from the joint body and is rotationally provided with a valve handle, and is fixedly arranged on the joint body through a valve nut, the other end of the valve pin is located inside the body and is rotationally provided with a connecting rod, the connecting rod is provided with a refueling valve at the end, and the refueling valve is externally provided with a valve seat which can rotate relative to the joint body, and the valve seat is also provided with a clamping groove matched with the flange on the aircraft refueling seat, when installed, the docking disc 54 is located below the valve seat, and the clamping grooves of the two are correspondingly matched, the refueling seat is clamped into the clamping groove on the upper valve seat through the clamping groove of the lower docking disc 54, and the operator can drive the valve pin to rotate by rotating the valve handle, thereby driving the connecting rod to lift up and down in the joint body, thereby opening or closing the refueling valve.

[0022] When the aircraft is docked for refueling, the clamping grooves of the docking disc 54 and the valve seat are aligned with the flange of the aircraft refueling seat, then the handle on the handle seat is held, the refueling joint is rotated, the upper valve seat is rotated relative to the refueling seat through the clamping action, the clamping groove of the valve seat is partially turned into the protruding part of the docking disc, thereby driving the flange of the refueling head clamped in the clamping groove of the valve seat to also turn into the protruding part of the docking disc, thereby limiting and fixing the refueling seat, then the refueling valve is lifted up by holding the valve handle to perform refueling operation.

[0023] Please refer to Figures 1-2 As shown in the figure, the first disassembling part 11 and the second disassembling part 12 both comprise connecting rods 111 with the same or different diameters, that is, the first disassembling part 11 and the second disassembling part 12 can be provided with connecting rods 111 with the same or different diameters according to the design requirements of the operator, so as to adapt to the standardized disassembly process of the refueling head, wherein the connecting rods 111 of the first disassembling part 11 and the second disassembling part 12 are both provided with a connecting handle 112 at one end and a connecting head 113 at the other end, in this embodiment, two first disassembling parts 11 and one second disassembling part 12 are preferably provided according to the actual maintenance needs of the refueling head, and they can be detachably connected with the universal adapter 10, which not only facilitates storage, but also improves the adaptability of the universal adapter 10, making it more in line with the standardized maintenance process.

[0024] Please refer to Figure 1 , Figure 3 As shown in the figure, in order to facilitate assembly, the first disassembling part 11 and the second disassembling part 12 in this embodiment are clamped with the universal adapter 10, that is, the first disassembling part 11 or the second disassembling part 12 is axially limited by clamping, so that the bolt on the refueling head can be easily rotated and disassembled, specifically, the matching section 101 of the universal adapter 10 is provided with a groove 102 matched with the connecting handle 112, and when in use, the connecting handle 112 is aligned with the groove 102 and clamped in, thereby improving convenience.

[0025] Please see Figures 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. 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.

[0026] Please see Figures 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.

[0027] Please see Figure 5 , Figure 12 , Figure 13As 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.

[0028] Please see Figures 5-6 As 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.

[0029] 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.

[0030] Please see Figure 8 ,Figure 14 As 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.

[0031] A maintenance method according to an embodiment of the present invention A maintenance method using the aforementioned specialized equipment for inspecting and cleaning aircraft refueling connectors, comprising the following steps: Combination step S1: as follows Figures 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. 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. That is, the repair part A is: combination ① ratchet wrench + 8mm hex socket; The repair part B is: combination ① ratchet wrench + 3mm hexagonal ball head; combination ② ratchet wrench + 5mm hexagonal ball head; 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. 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. 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; 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. Figures 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. 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. 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. 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.

[0032] 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.

[0033] 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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