Aircraft safety valve auxiliary installation device and method

Abstract

The present invention belongs to the technical field of aircraft assembly and measurement, and proposes an auxiliary installation device and method for an aircraft safety valve. The auxiliary installation device for an aircraft safety valve is installed between the safety valve and the clamping clamp, and includes a pad, a slider, a support, a support, an adjustment bolt, a fixing nut, a bushing, an adjustment screw and a felt pad; by adjusting the numerical height of the adjustment bolt fixed on the finished product, the consistency of the distance between the clamping clamp and the edge of the finished product is ensured, thereby reducing the deflection of the clamping clamp installation and increasing the stability of the clamping clamp fixation. Compared with the traditional assembly method, the device indirectly guarantees the installation clearance requirement between the clamping clamp and the edge of the safety valve in the circumferential direction, and does not need to select multiple points for measurement, so as to ensure the deflection of the clamping clamp installation, so that the clamping clamp is fully engaged with the contact surface of the safety valve and the flange, and the reliability and accuracy of the clamping clamp fixation are guaranteed to the greatest extent.

Description

Technical Field

[0001] The invention relates to the technical field of aircraft assembly and measurement, and in particular to an auxiliary installation device and method for an aircraft safety valve. Background Art

[0002] The working characteristics of the aircraft safety valve are of great significance to the pilot's driving status and the overall flight status of the aircraft. Because the safety valve is mainly used to prevent the damage that may occur when the residual pressure inside and outside the airtight cabin exceeds the limit value, and can be used to perform emergency decompression of the cabin and adjust the air pressure in the cabin to meet the physiological and health needs of the pilot. Its installation position is located on the rear wall panel of the aircraft cabin. The operator needs to enter from the rear equipment compartment to complete the docking of the safety valve and the flange, and fix it with a clamping clamp. The current traditional installation method has the following main disadvantages:

[0003] (1) In actual assembly, the operating space is extremely small and the rear wall has a certain slope, which can only accommodate one person. The operator needs to ensure the coaxiality between the safety valve and the flange and the deflection of the clamping clamp at the same time, and the installation accuracy cannot be guaranteed.

[0004] (2) Due to the limitation of operating space, operators often need to repeatedly calibrate and disassemble, which greatly reduces the installation efficiency;

[0005] (3) Due to repeated disassembly and assembly, the self-locking nut on the clamping clamp will be mechanically damaged and unable to prevent loosening. The safety valve is easy to fall off under the flight vibration of the aircraft, causing the cabin to be leaky and endangering the life safety of the pilot. Summary of the invention

[0006] In view of the above reasons, an aircraft safety valve auxiliary installation device and method are invented. The aircraft safety valve auxiliary installation device is mainly used for auxiliary installation and precise measurement of aircraft safety valves. It not only has a novel structure, but also improves operability and installation accuracy, and solves the difficult problems of aircraft safety valves in the installation process to the greatest extent.

[0007] The technical solution of the present invention is: an auxiliary installation device for an aircraft safety valve, which is installed between the safety valve and the clamping clamp, and includes a pad 1, a fixing bolt support slider 2, a baffle support slider 3, a baffle support 4, a fixing bolt support 5, an adjusting bolt 6, a fixing nut 7, a sleeve 8, a sleeve felt pad 9, a baffle felt pad 10, a baffle support adjusting screw 11, a fixing bolt support adjusting screw 12 and a pad felt pad 13;

[0008] The pad 1 is an arc-shaped plate with an L-shaped cross-section, including a horizontal edge and a vertical edge, and the intersection of the two is an indented slide groove for limiting the clamping clamp; the pad 1 is mainly responsible for being installed between the safety valve and the clamping clamp, and the edge of the clamping clamp is close to the pad 1, which is used to limit the clamping clamp; the fixed bolt support slider 2 and the baffle support slider 3 move in the slide groove, and the positions of the baffle support 4 and the fixed bolt support 5 are adjusted according to the position of the safety valve bracket and different operating spaces; the fixed bolt support 5 with a through groove is installed on the fixed bolt support slider 2 through the fixed bolt support adjusting screw 12; the adjusting bolt 6 is fixed by the fixing nut 7 after passing through the through groove of the fixed bolt support 5 and is sleeved with a shaft sleeve 8; the baffle support 4 is installed on the baffle support slider 3 through the baffle support adjusting screw 11, and the baffle support 4 is used to cooperate with the shaft sleeve 8 to limit the safety valve bracket.

[0009] A pad felt pad 13 is glued to the bottom of the horizontal edge of the pad 1, and the baffle felt pad 10 and the sleeve felt pad 9 are respectively glued to the opposite surfaces of the baffle support 4 and the sleeve 8. The function is to prevent the metal material from scratching the surface of the safety valve bracket. It also has the function of increasing friction to prevent the safety valve and the clamping clamp from slipping off the aircraft safety valve auxiliary installation device.

[0010] There is a 5mm long groove on the fixing bolt support 5. The position of the adjusting bolt 6 in the groove is changed according to the actual situation, and then fixed with a fixing nut 7.

[0011] By adjusting the numerical height of the adjusting bolt 6 fixed on the finished product, the consistency of the distance between the clamping clamp and the edge of the finished product can be ensured, thereby reducing the deflection of the clamping clamp installation and increasing the stability of the clamping clamp fixation. For example, if it is necessary to ensure the installation clearance requirement of 2mm between the clamping clamp and the edge of the safety valve, the height of the baffle support adjusting screw 11 and the fixing bolt support adjusting screw 12 at the safety valve can be adjusted, and the distance between the pad 1 and the edge of the safety valve can be adjusted to 2mm. When the clamping clamp is installed close to the pad 1, the clearance requirement of 2mm between the clamping clamp and the edge of the safety valve is indirectly guaranteed.

[0012] An auxiliary installation method for an aircraft safety valve comprises the following steps:

[0013] 1) When matching on the ground, install the aircraft safety valve auxiliary installation device on the safety valve bracket, and move the fixing bolt support slider 2 and the baffle support slider 3 on the pad 1;

[0014] 2) Move the adjusting bolt 6 to the position of the groove on the fixing bolt support 5 according to the position of the safety valve bracket;

[0015] 3) Adjust the baffle support adjusting screw 11 and the fixing bolt support adjusting screw 12, determine the height of the baffle support 4 and the fixing bolt support 5, and make the clearance value Amm between the clamping clamp and the safety valve;

[0016] 4) After ensuring that the shaft sleeve felt pad 9 on the shaft sleeve 8 and the baffle felt pad 10 on the baffle support 4 are fully limited to the safety valve bracket, tighten the adjusting bolt 6 and the fixing nut 7;

[0017] 5) The operator holds the safety valve with the auxiliary device and enters the rear wall of the cockpit in the rear equipment compartment; connects the safety valve with the flange to ensure coaxiality;

[0018] 6) Install the edge of the clamping hoop close to the backing plate 1 to ensure the deflection of the clamping hoop;

[0019] 7) Tighten the self-locking nut to complete the installation of the safety valve.

[0020] Beneficial effects of the present invention:

[0021] (1) The present invention has a small structure and volume, is simple to operate, and is easy to assemble and disassemble, which is more conducive to the assembly of aircraft safety valves and reduces the difficulty of assembly.

[0022] (2) Compared with the traditional assembly method, the present device adjusts the distance between the gasket 1 and the safety valve by adjusting the screw 11 of the baffle support and the screw 12 of the fixing bolt support, thereby indirectly ensuring the installation clearance requirement between the clamping clamp and the edge of the safety valve in the circumferential direction. There is no need to select multiple points for measurement to ensure the deflection of the installation of the clamping clamp, so that the contact surface of the clamping clamp, the safety valve and the flange are fully engaged, thereby ensuring the reliability and accuracy of the clamping clamp fixation to the greatest extent.

[0023] (3) When the safety valve is assembled by the device, the operator does not need to adjust the installation angle of the clamping clamp under limited operating space. It is only necessary to ensure the coaxiality of the safety valve and the flange, which reduces the assembly time and greatly improves the work efficiency.

[0024] (4) The device can avoid repeated disassembly and assembly of the self-locking nut on the clamping clamp, thereby maintaining the anti-loosening property and service life of the self-locking nut to the greatest extent, so that the safety valve is firmly fixed on the flange, and the safety valve is prevented from falling off due to aircraft vibration.

[0025] (5) The device can adjust the clamping position according to the appearance and structure of different safety valves, and is suitable for assembling safety valves of different types on different models, thereby expanding the scope of use and improving practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a left side view of the auxiliary installation device for the aircraft safety valve;

[0027] Figure 2 This is a right side view of the auxiliary installation device for the aircraft safety valve;

[0028] Figure 3 This is a schematic diagram of the installation of the aircraft safety valve auxiliary installation device;

[0029] Figure 4 This is a diagram showing the relative positions of the aircraft safety valve auxiliary installation device and the safety valve bracket;

[0030] Figure 5 It is an overall schematic diagram of the aircraft safety valve auxiliary installation device, the safety valve bracket and the clamping clamp.

[0031] Among them: 1- pad, 2- fixing bolt support slider, 3- baffle support slider, 4- baffle support, 5- fixing bolt support, 6- adjusting bolt, 7- fixing nut, 8- bushing, 9- bushing felt pad, 10- baffle felt pad, 11- baffle support adjusting screw, 12- fixing bolt support adjusting screw, 13- pad felt pad. DETAILED DESCRIPTION

[0032] The specific implementation methods and steps of the present invention are as follows:

[0033] 1) When matching on the ground, install the aircraft safety valve auxiliary installation device on the safety valve bracket, and move the fixing bolt support slider 2 and the baffle support slider 3 on the pad 1 according to the actual installation situation;

[0034] 2) Move the adjusting bolt 6 to the position of the groove on the fixing bolt support 5 according to the position of the safety valve bracket;

[0035] 3) Adjust the baffle support adjusting screw 11 and the fixing bolt support adjusting screw 12, determine the height of the baffle support 4 and the fixing bolt support 5, and make the clearance value Amm between the clamping clamp and the safety valve;

[0036] 4) After ensuring that the shaft sleeve felt pad 9 on the shaft sleeve 8 and the baffle felt pad 10 on the baffle support 4 can fully limit the safety valve bracket, tighten the adjustment bolt 6 and the fixing nut 7, as shown in the schematic diagram. Figure 3 As shown;

[0037] 5) The operator holds the safety valve with the auxiliary device and enters the rear wall of the cockpit in the rear equipment compartment;

[0038] 6) First, connect the safety valve to the flange to ensure coaxiality, as shown in the schematic diagram. Figure 4 As shown;

[0039] 7) Install the edge of the clamping clamp close to the pad 1 to ensure the deflection of the clamping clamp, as shown in the schematic diagram. Figure 5 As shown;

[0040] 8) Tighten the self-locking nut to complete the installation of the safety valve;

[0041] 9) Loosen the fixing nut 7 and the adjusting bolt 6, remove the aircraft safety valve auxiliary installation device and store it properly.

Claims

1. An auxiliary installation device for an aircraft safety valve, characterized in that: The aircraft safety valve auxiliary installation device is installed between the safety valve and the clamping clamp, and comprises a pad (1), a fixing bolt support slider (2), a baffle support slider (3), a baffle support (4), a fixing bolt support (5), an adjustment bolt (6), a fixing nut (7), a shaft sleeve (8), a shaft sleeve felt pad (9), a baffle felt pad (10), a baffle support adjustment screw (11), a fixing bolt support adjustment screw (12) and a pad felt pad (13); The backing plate (1) is a section of arc-shaped plate, and its cross section is L-shaped, including a horizontal side and a vertical side, and the intersection of the two sides is a sunken slide groove for limiting the clamping clamp; the fixed bolt support slider (2) and the baffle support slider (3) move in the slide groove; the fixed bolt support (5) with a through groove is installed on the fixed bolt support slider (2) through the fixed bolt support adjusting screw (12); the adjusting bolt (6) is fixed by the fixing nut (7) and sleeved with a shaft sleeve (8) after passing through the through groove of the fixed bolt support (5); the baffle support (4) is installed on the baffle support slider (3) through the baffle support adjusting screw (11), and the baffle support (4) is used to cooperate with the shaft sleeve (8) to limit the safety valve bracket.

2. The aircraft safety valve auxiliary installation device according to claim 1, characterized in that: A pad felt pad (13) is adhered to the bottom of the horizontal edge of the pad (1), and the baffle felt pad (10) and the shaft sleeve felt pad (9) are adhered to the opposite surfaces of the baffle support (4) and the shaft sleeve (8) respectively.

3. An auxiliary installation method for an aircraft safety valve, characterized in that: The aircraft safety valve auxiliary installation device according to any one of claims 1 to 2 is used to complete the installation, comprising the following steps: 1) When ground-mounted, install the aircraft safety valve auxiliary installation device on the safety valve bracket, and move the fixing bolt support slider (2) and the baffle support slider (3) on the pad (1); 2) Move the adjusting bolt (6) to the position of the groove on the fixing bolt support (5) according to the position of the safety valve bracket; 3) Adjust the baffle support adjusting screw (11) and the fixing bolt support adjusting screw (12) to determine the height of the baffle support (4) and the fixing bolt support (5) so that the clearance value between the clamping clamp and the safety valve is Amm; 4) After ensuring that the shaft sleeve felt pad (9) on the shaft sleeve (8) and the baffle felt pad (10) on the baffle support (4) are fully restrained against the safety valve bracket, tighten the adjusting bolt (6) and the fixing nut (7); 5) The operator holds the safety valve with the auxiliary installation device and enters the rear wall of the cockpit in the rear equipment compartment; connects the safety valve with the flange to ensure coaxiality; 6) Install the edge of the clamping clamp against the backing plate (1) to ensure the deflection of the clamping clamp; 7) Tighten the self-locking nut to complete the installation of the safety valve.

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