CN117682081A - Spring lock type pressure relief flap - Google Patents

Abstract

The application belongs to the field of aircraft structural design, and particularly relates to a spring lock type pressure relief flap. Comprising the following steps: the positioning frame is arranged on the mouth frame of the blocking wall through bolts, and a rubber sealing ring is arranged on the positioning frame; the pressure relief plate is fixedly arranged with the positioning frame through a spring lock; the guard rail is fixedly connected with the positioning frame through welding, and the guard rail is covered on the pressure release plate. According to the spring lock type pressure relief cover, the problem that the safety of an aircraft structure is caused by overlarge pressure difference between passenger and cargo holds due to the pressure loss of the cargo holds is solved, under the condition of normal flight by comprehensively considering the pressure relief and fireproof requirements, the pressure relief plate is locked to prevent opening through the spring lock, and the fireproof function is realized through the sealing rubber ring; when the cargo hold is damaged to cause decompression, the spring lock automatically bounces off beyond a certain pressure difference threshold value, so that the pressure relief flap automatically falls off, pressure balance is realized by short-time pressure relief, and flight safety is ensured.

Description

Spring lock type pressure relief flap

Technical Field

The application belongs to the field of aircraft structural design, and particularly relates to a spring lock type pressure relief flap.

Background

If the cargo hold of the aircraft is accidentally damaged during the flying process, the air pressure in the cabin suddenly leaks, and a pressure difference load appears between the cargo hold and the passenger cabin, and the load may cause local failure of the structure, further endangering the bearing capacity of the aircraft body, and also may cause the operation or operation failure of the aircraft due to the deformation of the aircraft body, and finally causing the aircraft safety accident. The pressure relief port cover is a pressure relief channel arranged between two relatively independent airtight cabin bodies and is in a closed state in general. When a large pressure difference occurs between the two cabins and reaches a preset threshold value, the pressure relief flap can be opened rapidly, so that the pressure balance of the two cabins is realized. The pressure relief flap in the prior art also has the problems of non-fireproof performance, heavy weight and the like.

It is therefore desirable to have a solution that overcomes or at least alleviates at least one of the above-mentioned drawbacks of the prior art.

Disclosure of Invention

The purpose of this application is to provide a snap-lock pressure release flap to solve at least one problem that prior art exists.

The technical scheme of the application is as follows:

a snap-lock pressure relief flap comprising:

the positioning frame is arranged on the mouth frame of the blocking wall through bolts, and a rubber sealing ring is arranged on the positioning frame;

the pressure relief plate is fixedly arranged with the positioning frame through a spring lock;

the guard rail is fixedly connected with the positioning frame through bolts, and the guard rail is covered on the pressure release plate.

In at least one embodiment of the present application, the locating frames are mounted on the mouth frame of the arresting wall by bolts uniformly distributed in the circumferential direction.

In at least one embodiment of the present application, the relief plate is a honeycomb sandwich structure of equal thickness.

In at least one embodiment of the present application, the pressure relief plate is mounted and secured to the positioning frame by a plurality of snap locks.

In at least one embodiment of the present application, the snap lock comprises a stopper, a lock body, and a latch, wherein,

the limiting block is fixedly arranged on the positioning frame, and a locking hole is formed in the limiting block;

the lock body is fixedly arranged on the pressure release plate, a containing cavity is formed in the lock body, and a first through hole and a second through hole which are communicated with the containing cavity are respectively formed in two ends of the lock body;

the lock pin is arranged in the accommodating cavity, one end of the lock pin penetrates out of the first through hole and is inserted into the lock hole of the limiting block, the other end of the lock pin penetrates out of the second through hole, a gasket is arranged on the lock pin, a spring is further sleeved on the lock pin, and two ends of the spring are limited by the gasket and the lock body respectively.

In at least one embodiment of the present application, the end of the locking pin that mates with the locking hole of the stopper has a tapered head.

In at least one embodiment of the present application, the guard rail has a mounting edge and a plurality of rails staggered on the mounting edge.

The invention has at least the following beneficial technical effects:

according to the spring lock type pressure relief cover, the problem that the safety of an aircraft structure is caused by overlarge pressure difference between passenger and cargo holds due to the pressure loss of the cargo holds is solved, under the condition of normal flight by comprehensively considering the pressure relief and fireproof requirements, the pressure relief plate is locked to prevent opening through the spring lock, and the fireproof function is realized through the sealing rubber ring; when the cargo hold is damaged to cause decompression, the spring lock automatically bounces off beyond a certain pressure difference threshold value, so that the pressure relief flap automatically falls off, pressure balance is realized by short-time pressure relief, and flight safety is ensured.

Drawings

FIG. 1 is an exploded view of a snap-lock relief flap according to one embodiment of the present application;

FIG. 2 is a schematic view of a snap lock of one embodiment of the present application;

fig. 3 is A-A view of fig. 2.

Wherein:

1-a positioning frame; 2-a rubber sealing ring; 3-a pressure relief plate; 4-guard rails; 5-a snap lock; 6-limiting blocks; 7-a lock body; 8-a bolt; 9-conical head.

Detailed Description

In order to make the purposes, technical solutions and advantages of the implementation of the present application more clear, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of the present application. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present application and are not to be construed as limiting the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application. Embodiments of the present application are described in detail below with reference to the accompanying drawings.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of the present application.

The present application is described in further detail below in conjunction with fig. 1-3.

The application provides a snap-lock pressure release flap, include: a positioning frame 1, a pressure relief plate 3 and a protective fence 4.

Specifically, as shown in fig. 1, a positioning frame 1 is fixedly arranged on a mouth frame of a blocking wall through bolts uniformly distributed in the circumferential direction, and a rubber sealing ring 2 is glued on the positioning frame 1; the pressure relief plate 3 is fixedly arranged with the positioning frame 1 through a spring lock 5, and the spring lock 5 can prevent the pressure relief plate 3 from moving forwards; the rail guard 4 passes through bolt fixed mounting on locating frame 1, and rail guard 4 cover is established on pressure release board 3, and rail guard 4 can prevent that the goods in the backward goods cabin from touching stops pressure release board 3, protects pressure release board 3 to maintain necessary backward space in order to realize the pressure release function smoothly.

In the preferred embodiment of the present application, the pressure release plate 3 is a honeycomb sandwich structure with equal thickness, and has good self rigidity and light weight.

In the preferred embodiment of the present application, the pressure relief plate 3 is mounted and fixed to the positioning frame 1 by a plurality of snap locks 5. In this embodiment, the snap locks 5 include 4, and are respectively and uniformly distributed and mounted at 2 long side positions of the rectangular pressure release plate 3.

In the preferred embodiment of the present application, the latch 5 includes a stopper 6, a lock body 7, and a plug pin 8. The limiting block 6 is fixedly arranged on the positioning frame 1, and a locking hole is formed in the limiting block 6; the lock body 7 is fixedly arranged on the pressure release plate 3, the lock body 7 is provided with a containing cavity, and two ends of the lock body 7 are respectively provided with a first through hole and a second through hole which are communicated with the containing cavity; the lock pin 8 is arranged in the accommodating cavity, one end of the lock pin 8 penetrates out of the first through hole and is inserted into the lock hole of the limiting block 6 to realize stop, the other end of the lock pin penetrates out of the second through hole, a gasket is arranged on the lock pin 8, a spring is further sleeved on the lock pin 8, and two ends of the spring are limited by the gasket and the lock body 7 respectively.

It will be appreciated that the end of the locking pin 8 which engages the locking aperture of the stop 6 has a tapered head 9.

In a preferred embodiment of the present application, the guard rail 4 has a mounting edge and a plurality of rails arranged alternately on the mounting edge.

The spring lock type pressure relief flap of the application, in the normal flight process of an airplane, the spring lock 5 prevents the pressure relief plate 3 from moving backwards, the front side and the rear side are clamped under the combined action of the limiting block 6 and the lock body 7, the pressure relief plate 3 keeps a fixed position and is fixed, and sealing between two cabin bodies is achieved. When the pressure difference load on the pressure release plate 3 is overlarge, the bolt 8 is separated from the lock hole of the limiting block 6, the pressure release plate 3 is not blocked any more, is separated backwards, falls into the protective guard 4, and is communicated between the front cabin body and the rear cabin body at the moment, so that pressure release is realized.

The spring lock type pressure relief flap of the application has the following specific design process:

the first step: coordinating the surrounding structure of the pressure relief port cover, and determining the allowable maximum pressure relief area;

and a second step of: determining a pressure relief threshold value of the pressure relief flap according to the structural bearing capacity and the pressure balance relation among the cabin bodies;

and a third step of: preliminarily determining the number of the spring locks and the taper of the lock pins according to the pressure relief threshold and the shape of the pressure relief cover;

fourth step: according to the fireproof requirement of the cabin, the material of the pressure release plate is determined to be phenolic resin glass cloth and Nomex paper honeycomb core material; determining the number of layers, the angle and the honeycomb height of the pressure relief plate through numerical simulation calculation and experiments according to the pressure relief threshold;

sixth step: determining the height of the guard rail according to the pressure relief area;

seventh step: and selecting a proper sealing rubber ring according to the fireproof requirement.

The spring lock type pressure relief flap can automatically realize the pressure relief function when the aircraft cargo hold is out of pressure. Has the following beneficial effects:

1) The protective guard is designed, so that the pressure relief flap can be prevented from being accidentally blocked by cargoes and not being normally sprung;

2) The pressure release plate adopts a composite honeycomb sandwich structure, has high rigidity and light weight, and realizes the structure lightweight design;

3) The spring lock is provided with a bolt type spring lock, the pressure release plate is fixed to prevent opening during normal flight, the spring lock is automatically opened to realize pressure release when the pressure difference is increased to a threshold value under the unexpected condition, and the design of the spring lock is simple and reliable;

4) The rubber sealing ring is designed, flame isolation among cabin bodies is achieved, and a fireproof function is achieved.

The spring lock type pressure relief flap has comprehensively considered and designed for automatic pressure relief, fire prevention and goods blocking prevention functions.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present application should be covered in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (7)

1. A snap-lock pressure relief flap, comprising:

the positioning frame (1), the positioning frame (1) is arranged on the mouth frame of the blocking wall through bolts, and the rubber sealing ring (2) is arranged on the positioning frame (1);

the pressure relief plate (3) is fixedly arranged with the positioning frame (1) through a spring lock (5);

the protective guard (4), protective guard (4) pass through the bolt with locating frame (1) fixed connection, protective guard (4) cover is established on pressure release board (3).

2. The snap-lock pressure relief flap according to claim 1, characterized in that the positioning frame (1) is mounted on the mouth frame of the arresting wall by bolts uniformly distributed in the circumferential direction.

3. The snap-lock pressure relief flap according to claim 1, characterized in that the pressure relief plate (3) is a honeycomb sandwich structure of equal thickness.

4. The snap-lock pressure relief flap according to claim 1, characterized in that the pressure relief plate (3) is fixed to the positioning frame (1) by means of a plurality of snap locks (5).

5. The snap-lock pressure relief flap of claim 4, wherein the snap lock (5) comprises a stopper (6), a lock body (7) and a latch (8), wherein,

the limiting block (6) is fixedly arranged on the positioning frame (1), and a locking hole is formed in the limiting block (6);

the lock body (7) is fixedly arranged on the pressure relief plate (3), a containing cavity is formed in the lock body (7), and a first through hole and a second through hole which are communicated with the containing cavity are respectively formed in two ends of the lock body (7);

the lock pin (8) is arranged in the accommodating cavity, one end of the lock pin (8) penetrates out of the first through hole and is inserted into the lock hole of the limiting block (6), the other end of the lock pin penetrates out of the second through hole, a gasket is arranged on the lock pin (8), a spring is further sleeved on the lock pin (8), and two ends of the spring are limited by the gasket and the lock body (7) respectively.

6. The snap-lock pressure relief flap according to claim 1, characterized in that the end of the locking pin (8) that cooperates with the locking hole of the stopper (6) has a conical head (9).

7. The snap-lock pressure relief flap of claim 1, wherein the guard rail (4) has a mounting edge and a plurality of rails staggered on the mounting edge.