Fuel oil closed switch performance test device

Abstract

The utility model discloses a fuel oil enclosed switch performance test device, which belongs to the technical field of aviation repair, and comprises a left clamp, a right clamp, an inflatable gland, pull rods, a rubber pad and the like, the left clamp and the right clamp form an openable annular structure for clamping a fuel oil enclosed switch, the openable annular structure is fixedly provided with four pull rods, one side of the inflatable gland is provided with an oil inlet nozzle, and the other side of the inflatable gland is provided with an oil outlet nozzle. A groove is formed in the other side, four through holes are formed in the circumference, a rubber pad is installed in the groove, a pull rod penetrates through the inflation gland and then is matched with a butterfly nut, and the fuel oil sealing switch is tightly pressed on the inflation gland. According to the utility model, the problem of poor sealing of the original tool and the enclosed switch is solved.

Description

Technical Field

[0001] This utility model belongs to the field of aviation repair technology and relates to a fuel shut-off switch performance testing device, specifically a device for testing the fuel shut-off switch performance of a certain type of aircraft. Background Technology

[0002] During a major overhaul of a certain type of aircraft, its fuel shut-off switch J7-6100-100 needs to be disassembled and repaired, and a performance test is required after reassembly to check for fuel leaks. The performance test involves adding fuel to the fuel shut-off switch through the inlet at the specified pressure and checking for fuel leaks when the switch is closed. Currently, the performance test suffers from a problem with the device and the shut-off switch's seal not being adequate when refueling. Utility Model Content

[0003] This utility model provides a fuel sealing switch performance testing device, which can realize fuel sealing switch performance testing, and has stable performance, reliable use, and convenient disassembly and assembly, and will not cause damage to the sealing switch during use.

[0004] The present invention adopts the following technical solution:

[0005] A fuel seal switch performance testing device, the testing device comprising a pin 1, a left clamp 2, an inflation gland 3, a pull rod 4, a rubber pad 5, a right clamp 6, and a clamping bolt 7.

[0006] The left clamp 2 and right clamp 6 are both semi-circular arcs, symmetrically arranged and connected at one end, forming an openable ring structure. The other end of both clamps has an opening parallel to the surface. The opening of the left clamp 2 has a through hole for installing the pin 1, and the opening of the right clamp 6 is for clamping the bolt 7 to pass through. Both the left clamp 2 and right clamp 6 have two mounting holes for installing the pull rod 4. After the left clamp 2 and right clamp 6 are combined into a ring, the four mounting holes are evenly distributed along the circumference.

[0007] The pin 1 has a shoulder machined at one end and an axial blind hole machined at the other end. After assembly, the end with the blind hole is flanged and riveted, which is simpler and more reliable than using nuts or cotter pins for fixing.

[0008] One end of the clamping bolt 7 is drilled and connected to the pin 1 between the openings of the left clamp 2, and the other end is threaded. After the clamping bolt 7 passes through the opening of the right clamp 6, it works with the wing nut and washer to clamp the left clamp 2 and the right clamp 6.

[0009] There are four pull rods 4 in total, with their lower ends welded into the mounting holes of the left clamp 2 and the right clamp 6 respectively, and the upper end of the pull rod 4 is threaded.

[0010] The inflatable cover 3 is a disc structure. A threaded vent is formed in the center of one side surface, and a groove is formed in the center of the other side surface for installing the rubber pad 5. The inflatable cover 3 has a through hole in the center and four pull rod through holes are evenly arranged around the circumference for the pull rod 4 to pass through. After the inflatable cover 3 is inserted into the top of the pull rod 4, it is fixed in position by the thread on the upper end of the pull rod 4, which is engaged with the wing nut and washer.

[0011] The rubber pad 5 is circular with a hole machined in the center for installation on the inflatable pressure cap 3.

[0012] Furthermore, the aforementioned test device can also be used for leak inspection of fuel pipes with mounting edges at both ends. When in use, the test device is used in pairs and installed at both ends of the fuel pipe.

[0013] The beneficial effects of this utility model are: This utility model solves the problem of poor sealing of the original tooling and sealing switch. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention, wherein (a) is the front view and (b) is a cross-sectional view of AA.

[0015] Figure 2 This is a schematic diagram of a pin.

[0016] Figure 3 The diagram shows the left side view, where (a) is the front view and (b) is the side view.

[0017] Figure 4 This is a schematic diagram of an inflatable pressure cap, where (a) is a side view and (b) is a front view.

[0018] Figure 5 This is a schematic diagram of the pull rod.

[0019] Figure 6 The diagram shows a rubber pad, where (a) is a side view and (b) is a front view.

[0020] Figure 7 The diagram shows the right side view, where (a) is the front view and (b) is the side view.

[0021] Figure 8 A schematic diagram of a clamping bolt, where (a) is the front view and (b) is the top view.

[0022] In the diagram: 1-Pin; 2-Left clamp; 3-Inflatable cover; 4-Pull rod; 5-Rubber pad; 6-Right clamp; 7-Clamping bolt. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in detail below.

[0024] This embodiment takes the fuel shut-off switch J7-6100-100 as an example to provide a fuel shut-off switch performance testing device. The testing device includes a pin 1, a left clamp 2, an inflation cap 3, a pull rod 4, a rubber pad 5, a right clamp 6, and a clamping bolt 7. Figure 1 .

[0025] The left clamp 2 and right clamp 6 are both semi-circular arcs (e.g., Figure 3 and Figure 7 The two clamps are symmetrically arranged and connected at one end to form an openable ring structure. The other end of both clamps has an opening parallel to the surface. The opening of the left clamp 2 has a through hole for installing the pin 1, and the opening of the right clamp 6 is for clamping the bolt 7 to pass through. Both the left clamp 2 and the right clamp 6 have two mounting holes for installing the tie rod 4. After the left clamp 2 and the right clamp 6 are combined into a ring, the four mounting holes are evenly distributed along the circumference.

[0026] like Figure 2 The pin 1 has a shoulder machined at one end and an axial blind hole machined at the other end. After assembly, the end with the blind hole is flanged and riveted, which is simpler and more reliable than using nuts or cotter pins for fixing.

[0027] like Figure 8 The clamping bolt 7 has a hole at one end connected to the pin 1 between the openings of the left clamp 2, and the other end is threaded. After the clamping bolt 7 passes through the opening of the right clamp 6, it works with the wing nut and washer to clamp the left clamp 2 and the right clamp 6.

[0028] like Figure 5 There are four pull rods 4 in total, with their lower ends welded into the mounting holes of the left clamp 2 and the right clamp 6 respectively, and the upper end of the pull rod 4 is threaded.

[0029] like Figure 4 The inflatable cover 3 is a disc structure with a threaded vent on one side and a groove on the other side for installing a rubber pad 5. The inflatable cover 3 has a through hole in the center and four pull rod through holes evenly arranged around its circumference for the pull rod 4 to pass through. After the inflatable cover 3 is inserted into the top of the pull rod 4, it is fixed in position by the threaded engagement of the pull rod 4 with a wing nut and a washer.

[0030] like Figure 6 The rubber pad 5 is circular with a hole machined in the center for installation on the inflatable pressure cover 3.

[0031] The working process is as follows: Loosen the wing nuts on pull rod 4 and clamping bolt 7 during operation. After opening the left and right clamps, place them on the fuel inlet of the fuel shut-off switch. Tighten the wing nuts on clamping bolt 7 to clamp the fuel shut-off switch. Tighten the wing nuts on pull rod 4 to press the fuel inlet of the fuel shut-off switch. Connect the testing equipment and the vent on the inflation cap 3 using a hose to perform a fuel filling test on the fuel shut-off switch. If there is no fuel leakage from the shut-off switch, the product repair is deemed successful.

Claims

1. A fuel seal switch performance testing device, characterized in that, The test apparatus includes a left clamp (2), an inflatable pressure cap (3), a pull rod (4), a rubber pad (5), and a right clamp (6); The left clamp (2) and right clamp (6) are both semi-circular arcs, arranged symmetrically and connected at one end, forming an openable and closable ring structure. The other end of both is set as a clamping structure. Two mounting holes are made on the left clamp (2) and right clamp (6) for mounting the pull rod (4). After the left clamp (2) and right clamp (6) are combined into a ring, the four mounting holes are evenly distributed along the circumference. There are four pull rods (4), with their lower ends welded into the mounting holes of the left clamp (2) and the right clamp (6) respectively. The upper end of the pull rod (4) is threaded. The inflatable cover (3) is a disc structure with an oil inlet in the center of one side surface and a groove in the center of the other side surface for installing a rubber pad (5). The inflatable cover (3) has a through hole in the center and four pull rod through holes are evenly arranged around the circumference for the pull rod (4) to pass through. After the inflatable cover (3) is inserted from the top of the pull rod (4), it is fixed in position by the threaded nut at the upper end of the pull rod (4). The rubber pad (5) is circular with a hole machined in the center.

2. The fuel seal switch performance testing device according to claim 1, characterized in that, The other ends of the left clamp (2) and the right clamp (6) are both made with openings parallel to the surface. The opening of the left clamp (2) is made with a through hole for installing the pin (1). The opening of the right clamp (6) is for the clamping bolt (7) to pass through. One end of the clamping bolt (7) is made with a hole connected to the pin (1) between the openings of the left clamp (2), and the other end is threaded. After the clamping bolt (7) passes through the opening of the right clamp (6), it is used with a nut to clamp the left clamp (2) and the right clamp (6).

3. The fuel seal switch performance testing device according to claim 2, characterized in that, The pin (1) has a shoulder at one end and an axial blind hole at the other end. After assembly, the end with the blind hole is flanged and riveted.

4. A fuel seal switch performance testing device according to any one of claims 1-3, characterized in that, The aforementioned test device can also be used for leak inspection of fuel pipes with mounting edges at both ends. When in use, the test device is used in pairs and installed at both ends of the fuel pipe.

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