A device for checking the wear condition of a refueling adapter and a refueling interface docking disc

Abstract

The application discloses the technical fields of refueling connector and checks device of the wear condition of the refueling connector and the aircraft refueling interface butt joint disc, including detection caliper, the top end of both sides of detection caliper is equipped with top clamping groove, in the condition that the refueling connector butt joint disc is staggered with valve seat 15 ° by special tool, the wear condition in the detection of the butt joint disc is detected with the detection caliper embedded in the left and right clamping groove and the three flanges on the aircraft oil receiving connecting seat. The discrimination standard is simple and easy to understand, and the operation is convenient: the check device is simple in design, and the operator can operate without complex training, improving the detection efficiency. One person independently detects, saves time and effort: compared with the traditional detection method, the device allows a single person to complete the detection task independently, saving human resources. Early prediction of leakage hidden trouble: through regular detection, the wear condition of the refueling connector butt joint disc can be found in time, and replacement is carried out in advance, effectively preventing the leakage problem in the refueling operation process.

Description

Technical Field

[0001] This invention relates to the field of refueling connector technology, specifically a device for inspecting the wear condition of the refueling connector and the refueling interface plate of an aircraft. Background Technology

[0002] Currently, the refueling connectors used in Chinese aviation fuel refueling trucks are divided into two types: imported and domestically produced. During frequent connections with aircraft fuel tank openings, wear is inevitable on the mating surfaces of the refueling connector and the aircraft fuel inlet. According to MHT6002-2025, "Technical Specifications for the Integrity of Civil Aviation Fuel Equipment," pressure refueling connectors must be securely locked, with intact safety seals, free from rust and breakage on the dust cover and chain, flexible opening and closing, and a good seal without leakage. Furthermore, wear testing must be performed according to the manufacturer's requirements to ensure compliance. In addition, excessive wear on the metal mating surfaces (connecting discs) of the refueling connector is one of the main causes of oil leakage during refueling, and this cannot be visually assessed during routine inspections. Currently, most sealing tests for domestically produced refueling connectors are conducted on integrated testing platforms, lacking a dedicated, rapid tool for separately testing the wear of the mating surfaces between the refueling connector and the aircraft fuel tank. Therefore, developing a rapid wear detection tool suitable for the mating discs of domestically produced refueling connectors is particularly important. Summary of the Invention

[0003] The purpose of this invention is to provide a device for inspecting the wear condition of the refueling connector and the aircraft refueling interface mating plate, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a device for inspecting the wear condition of a refueling connector and an aircraft refueling interface mating plate, comprising a caliper, wherein a bottom groove is provided at the bottom of the caliper, and lower detection teeth are fixedly connected to both sides of the bottom end of the caliper, and upper detection teeth are fixedly connected to the side wall of the caliper at the top of the lower detection teeth, and a detection groove is provided between the two upper detection teeth and the lower detection teeth, wherein the inner diameter of the detection groove is the minimum standard critical value of the refueling connector mating plate.

[0005] As a further aspect of the present invention: the lower outer side of the upper detection tooth and the upper outer side of the lower detection tooth are both chamfered, which facilitates the connection of the oiling connector docking plate when the detection groove rotates during detection.

[0006] Compared with the prior art, the beneficial effects of the present invention are: Simple and easy to understand, convenient to operate: The inspection device has a simple design, and operators can operate it without complicated training, which improves the detection efficiency.

[0007] Independent testing by one person, saving time and effort: Compared with traditional testing methods, this device allows a single person to complete the testing task independently, saving human resources.

[0008] Anticipate potential leaks in advance: Regular inspections can detect wear on refueling connectors in time, allowing for timely replacement and effectively preventing leaks during refueling operations.

[0009] Meets current regulatory requirements: This device is designed in strict accordance with the requirements of MHT6002-2025 to ensure the accuracy and reliability of the test results. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 A schematic diagram of the normal state of the aircraft refueling interface connection plate; Figure 3 A schematic diagram of the misaligned teeth of the aircraft refueling interface connection disc; Figure 4 This is a schematic diagram of the detection state of the inspection device of the present invention.

[0011] In the diagram: 1. Caliper; 2. Upper caliper teeth; 3. Detection groove; 4. Lower caliper teeth; 5. Bottom groove. Detailed Implementation

[0012] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0013] Please see Figure 1 In this embodiment of the invention, a device for inspecting the wear condition of a refueling connector and an aircraft refueling interface mating plate includes a caliper 1. The bottom of the caliper 1 has a bottom groove 5. Lower detection teeth 4 are fixedly connected to both sides of the bottom end of the caliper 1. Upper detection teeth 2 are fixedly connected to the side wall of the caliper 1 at the top of the lower detection teeth 4. A detection groove 3 is formed between the two upper detection teeth 2 and the lower detection teeth 4. The inner diameter of the detection groove 3 is set to the minimum standard critical thickness of the refueling interface mating plate.

[0014] The lower outer side of the upper detection tooth 2 and the upper outer side of the lower detection tooth 4 are chamfered to facilitate the detection of the refueling connector mating plate by the detection groove 3 during the detection process. This also protects the detection device from sharp contact with the refueling connector mating plate and prevents damage.

[0015] Technical parameters: The overall thickness of this caliper 1 is 2.5mm, and the other parameters are completely consistent with the parameter settings of the oil filling interface docking plate.

[0016] The specific testing scenarios are as follows, please refer to... Figures 2-4 At an airport fuel refueling station, operators used this inspection device to check the wear of domestically produced fuel connectors. First, using a special tool, the fuel connector's mating plate and valve seat were offset by 15°, forming... Figure 3 Status. Align the bottom groove 5 of the caliper 1 with the bottom edge of the fuel filler connector, and then adjust the position of the caliper 1 so that the upper detection tooth 2 and the lower detection tooth 4 are respectively embedded in the mating surface gap of the fuel filler connector mating plate. Using the upper detection tooth 2 as a reference surface, ensure that the lower part of the upper detection tooth 2 is in contact with the upper part of the mating surface of the fuel filler connector mating plate. Rotate the testing device and observe the passage of the detection groove 3 through the mating surface corresponding to the fuel filler connector mating plate to determine the wear condition of the mating surface. Since the inner diameter of the detection groove 3 is set to the minimum standard critical value, if the detection groove 3 can completely pass through the fuel filler connector mating plate, it indicates that the fuel filler connector mating plate is severely worn and thinned, does not meet the requirements, and needs to be replaced; conversely, if the detection groove 3 cannot pass through the fuel filler connector mating plate, it indicates that the thickness of the fuel filler connector mating plate still meets the standard and does not need to be replaced.

[0017] At another aviation fuel supply base, to verify the accuracy and reliability of this inspection device, operators simultaneously used both traditional testing methods and this device to conduct wear tests on the same batch of domestically produced refueling connectors. The results showed that the test results obtained by the two methods were basically consistent, but this device was significantly superior to the traditional method in terms of testing efficiency and ease of operation.

[0018] The working principle of this invention is based on mechanical measurement principles. By designing a reasonable structure and dimensional parameters for the measuring caliper 1, it can be precisely embedded in the mating surface gap of the refueling connector mating plate. When wear occurs on the mating surface of the refueling connector mating plate, its thickness decreases. When the measuring caliper 1 rotates, the lower contact surface of the top tooth 2 is used as a reference surface. The degree of wear is determined by observing the passage of the measuring groove 3 through the mating surface of the mating plate, ensuring the accuracy and reliability of the test results.

[0019] Additional instructions for use: Preparation stage: Check whether the testing device is intact and whether all parts are firmly connected. Then, use a special tool to make the oil filling connector mating plate and valve seat offset by 15°.

[0020] Positioning stage: Align the bottom groove 5 of the measuring caliper 1 with the bottom edge of the oil filling connector and fix it to ensure that the measuring caliper 1 is parallel to the mating surface of the oil filling connector.

[0021] Inspection Phase: Adjust the position of the caliper 1 so that the upper inspection teeth 2 and lower inspection teeth 4 are respectively inserted into the mating surface clearance of the oil filler connector and the mating plate. Rotate the caliper 1 to observe the passage of the inspection groove 3 and record the wear condition.

[0022] Analysis phase: If slot 3 can pass smoothly, it means that the wear of the mating surface of the docking plate is excessive and needs to be replaced; otherwise, it is within the normal range.

[0023] Cleaning phase: After the test is completed, clean the oil and impurities on the testing device and store it properly for future use.

[0024] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A device for inspecting the wear condition of a refueling connector and an aircraft refueling interface mating plate, comprising a caliper (1), characterized in that: The bottom of the caliper (1) is provided with a bottom groove (5), and both sides of the bottom end of the caliper (1) are fixedly connected with lower detection teeth (4). The side wall of the caliper (1) located at the top of the lower detection teeth (4) is fixedly connected with an upper detection tooth (2). A detection groove (3) is provided between the two upper detection teeth (2) and the lower detection teeth (4).

2. The device for inspecting the wear condition of the refueling connector and the aircraft refueling interface mating plate according to claim 1, characterized in that: The lower outer side of the upper detection tooth (2) and the upper outer side of the lower detection tooth (4) are both chamfered.

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