Pneumatic release lock and emergency evacuation slide

Abstract

The pneumatic release lock and emergency evacuation slide comprises a supporting seat, a piston and a pressing seat, the piston is arranged in an inner cavity of the supporting seat, a spring is connected between the lower end of the piston and the bottom of the inner cavity of the supporting seat, the pressing seat is arranged at the outlet end of the inner cavity of the supporting seat, and the upper end of the pressing seat is located outside the supporting seat. A piston rod connected with the piston penetrates out of the supporting base from the pressing base, a plurality of steel balls are evenly distributed at the upper end of the pressing base in the circumferential direction of the piston rod, an annular groove is correspondingly formed in the upper portion of the piston rod, and the annular groove is used for enabling the steel balls to retract into the annular groove when the annular groove in the piston rod moves to the plane where the steel balls are located. Pneumatic rapid separation can be achieved.

Description

Technical Field

[0001] This invention relates to the field of lifesaving equipment technology, specifically to a pneumatic release lock and emergency evacuation slide. Background Technology

[0002] Emergency evacuation slides are inflatable life-saving equipment used by large and medium-sized civil aircraft after emergency land (water) landings. Wing-mounted emergency evacuation slides are installed on the aircraft fuselage, and the sealing cover is detached by air supply. There is an urgent need for a pneumatic release lock to connect the emergency evacuation slide. Summary of the Invention

[0003] The purpose of this invention is to provide a pneumatic release lock and emergency evacuation slide that can achieve rapid pneumatic separation.

[0004] The technical solution adopted in this invention is:

[0005] A pneumatic release lock includes a support base, a piston, and a clamping seat. The piston is disposed in the inner cavity of the support base, and a spring is connected between the lower end of the piston and the bottom of the inner cavity of the support base. The clamping seat is disposed at the outlet end of the inner cavity of the support base, and the upper end of the clamping seat is located outside the support base. The piston rod connected to the piston passes through the clamping seat and out of the support base. Multiple steel balls are evenly distributed along the circumference of the piston rod at the upper end of the clamping seat. The upper part of the piston rod is provided with an annular groove, which is used to retract the steel ball into the annular groove when the annular groove on the piston rod moves to the plane where the steel ball is located.

[0006] Preferably, the clamping seat is connected to the support seat via threads.

[0007] Preferably, there are 3 to 6 steel balls, and all steel balls are on the same horizontal plane.

[0008] Preferably, the support base is provided with two air inlets, which are respectively arranged above and below the piston.

[0009] Preferably, a sealing ring is provided between the piston and the inner cavity of the support seat.

[0010] Preferably, the sealing ring is an O-ring.

[0011] Preferably, the inner cavity of the support base is a cylindrical cavity.

[0012] Preferably, the top of the piston rod is exposed outside the clamping seat.

[0013] An emergency evacuation slide is provided, wherein the slide is equipped with a pneumatic release lock, and the aircraft has a corresponding locking groove. When no air is supplied to the inner cavity of the support base, the spring pushes the piston to move. When the annular groove on the piston rod moves to a position that is misaligned with the plane of the steel balls, the steel balls move out of the annular groove and are exposed, fitting into the locking groove of the aircraft, thus achieving a locking connection between the emergency evacuation slide and the aircraft. When high-pressure air is supplied to the inner cavity of the support base to push the piston to move, when the annular groove on the piston rod moves to the plane of the steel balls, the steel balls retract into the annular groove and disengage from the locking groove, thus achieving the unlocking and disengagement function between the emergency evacuation slide and the aircraft.

[0014] The beneficial effects of this invention are:

[0015] 1. In this utility model, when high-pressure air is supplied to the inner cavity of the support seat to push the piston to move, when the annular groove on the piston rod moves to the plane of the steel ball, each steel ball retracts into the annular groove, realizing the unlocking and disengagement function. When no air is supplied to the inner cavity of the support seat, the spring pushes the piston to move, when the annular groove on the piston rod moves to a position that is offset from the plane of the steel ball, each steel ball moves out of the annular groove and is exposed, realizing the locking connection, and enabling pneumatic rapid separation.

[0016] 2. This utility model allows for the replacement of springs to adapt to different air source working pressures; it can also achieve the unlocking function by directly applying pressure to the top of the piston. When the external force is removed, the spring and piston reset and return to the locked state, which facilitates subsequent debugging and maintenance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the pneumatic release lock in an embodiment of the present invention.

[0018] Figure 2 yes Figure 1 A sectional view.

[0019] In the diagram: 1-Support seat, 2-Spring, 3-Piston, 4-Pressure seat, 5-Steel ball, 6-Air inlet. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0021] In the description of this invention, it should be understood that if terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0023] Example 1

[0024] A pneumatic release lock includes a support base 1, a piston 3, and a clamping seat 4. The piston 3 is disposed within the inner cavity of the support base 1, and a spring 2 is connected between the lower end of the piston 3 and the bottom of the inner cavity of the support base 1. The clamping seat 4 is disposed at the outlet end of the inner cavity of the support base 1, with its upper end located outside the support base 1. The piston rod connected to the piston 3 passes through the inner channel of the clamping seat 4 and exits outside the support base 1. Multiple steel balls 5 are evenly distributed around the upper end of the clamping seat 4 along the circumference of the piston rod, with each steel ball 5 located outside the support base 1. A corresponding annular groove is provided on the upper part of the piston rod, the annular groove being used when the piston... When the annular groove on the rod moves to the plane where the steel ball is located, the steel ball 5 retracts into the annular groove. When high-pressure air is supplied to the inner cavity of the support seat 1 to push the piston to move, when the annular groove on the piston rod moves to the plane of the steel ball 5, each steel ball 5 retracts into the annular groove, realizing the unlocking and disengagement function. When no air is supplied to the inner cavity of the support seat 1, the spring pushes the piston to move, and when the annular groove on the piston rod moves to a position that is offset from the plane of the steel ball, each steel ball 5 moves out of the annular groove and is exposed, realizing the locking connection. There is a groove at a certain position between the piston and the top, and this position determines the piston's working stroke.

[0025] Furthermore, the clamping seat 4 is connected to the support seat 1 via threads.

[0026] Example 2

[0027] Based on Example 1, the number of steel balls is further limited.

[0028] Furthermore, the number of steel balls is 3 to 6, and all steel balls are on the same horizontal plane.

[0029] In a specific embodiment, the number of steel balls is preferably 4, and they must be installed on the same horizontal plane.

[0030] Furthermore, the support base 1 is provided with two air inlets 6, which are respectively arranged above and below the piston; the air inlets 6 are connected to the inner cavity of the support base 1 and are used to connect to the air source through the air pipe.

[0031] Furthermore, a sealing ring is provided between the piston and the inner cavity of the support seat 1.

[0032] Furthermore, the sealing ring is an O-ring.

[0033] Furthermore, the piston has several annular grooves, and is equipped with O-ring seals that cooperate with the inner cavity of the support seat 1 and the cavity of the pressing seat to complete the movable seal. The top annular groove is larger, and when it is pressed down, the steel ball enters the annular groove and disengages from the corresponding structure.

[0034] Furthermore, the inner cavity of the support base 1 is a cylindrical cavity used to house the spring and piston. The piston can move back and forth along the length of the cylindrical cavity. The top of the cavity is threaded, and the left and right sides have openings connected to the inner cavity to connect the air source and pipeline.

[0035] Both the lower end of the clamping seat and the top of the inner cavity of the support seat have threaded structures. The two are connected by threads, which not only provides a sealing function but also ensures that the four steel balls are in the same plane during installation. The spring is made of aviation standard parts and has been calculated to complete the unlocking function under a given air source pressure. Both the lower end of the clamping seat and the top of the inner cavity of the support seat have threaded structures. The two are connected by threads, which not only provides a sealing function but also ensures that the four steel balls are in the same plane during installation.

[0036] Furthermore, the top of the piston rod is exposed outside the clamping seat 4; by actively applying pressure to the top of the piston, the unlocking function can also be achieved. When the external force is removed, the spring and piston reset and return to the locked state.

[0037] Furthermore, the top of the piston rod protruding from the pressure seat 4 can be either the top of the piston rod passing through the pressure seat 4 and protruding to the outside, or the inner channel of the pressure seat 4 can be directly connected to the outside, and the piston rod does not protrude from the inner channel of the pressure seat, but a tool can be inserted into the inner channel of the pressure seat 4 to press the piston rod and piston.

[0038] An emergency evacuation slide is provided, wherein the slide is equipped with a pneumatic release lock and a corresponding locking groove is provided at the aircraft exit. When no air is supplied to the inner cavity of the support base 1, the spring pushes the piston to move. When the annular groove on the piston rod moves to a position that is misaligned with the plane of the steel balls, each steel ball 5 moves out of the annular groove and is exposed, embedded in the locking groove of the aircraft, thus achieving a locking connection between the emergency evacuation slide and the aircraft. When high-pressure air is supplied to the inner cavity of the support base 1 to push the piston to move, when the annular groove on the piston rod moves to the plane of the steel balls 5, each steel ball 5 retracts into the annular groove and disengages from the locking groove, thus achieving the unlocking and disengagement function between the emergency evacuation slide and the aircraft.

[0039] The locking groove is annular.

[0040] The working principle of the present invention is as follows: the spring 2 is placed at the bottom of the inner cavity of the support seat 1, the steel ball 5 is installed in the inner cavity of the clamping seat 4, the piston 3 is engaged with the clamping seat 4 through a hole shaft, and the clamping seat 4 is engaged with the support seat 1 through a threaded connection;

[0041] The air source supplies air into the cavity through the air inlet 6. When the pressure inside the cavity reaches a certain threshold, it will push the piston to move downward against the spring. When the annular groove at the top of the piston moves to the same horizontal position as the steel ball, the steel ball retracts into the annular groove, completing the unlocking and disengagement.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A pneumatic release lock, characterized in that: The device includes a support base (1), a piston (3), and a clamping base (4). The piston (3) is located in the inner cavity of the support base (1). A spring (2) is connected between the lower end of the piston (3) and the bottom of the inner cavity of the support base (1). The clamping base (4) is located at the outlet end of the inner cavity of the support base (1). The upper end of the clamping base (4) is located outside the support base (1). The piston rod connected to the piston (3) passes through the clamping base (4) and extends out of the support base (1). Multiple steel balls (5) are evenly distributed around the upper end of the clamping base (4) along the circumference of the piston rod. The upper part of the piston rod is provided with an annular groove. The annular groove is used to retract the steel ball (5) into the annular groove when the annular groove on the piston rod moves to the plane where the steel ball is located.

2. The pneumatic release lock as described in claim 1, characterized in that: The clamping seat (4) is connected to the support seat (1) by threads.

3. The pneumatic release lock as described in claim 2, characterized in that: There are 3 to 6 steel balls, all of which are on the same horizontal plane.

4. The pneumatic release lock as described in claim 1, characterized in that: The support base (1) is provided with two air inlets (6), which are located above and below the piston respectively.

5. The pneumatic release lock as described in claim 1, characterized in that: A sealing ring is provided between the piston and the inner cavity of the support seat (1).

6. The pneumatic release lock as described in claim 5, characterized in that: The sealing ring is an O-ring.

7. The pneumatic release lock as described in claim 1, characterized in that: The inner cavity of the support base (1) is a cylindrical cavity.

8. The pneumatic release lock according to claim 1, characterized in that: The top of the piston rod is exposed outside the pressure seat (4).

9. An emergency evacuation slide, characterized in that: The emergency evacuation slide is equipped with a pneumatic release lock as described in any one of claims 1-8, and the aircraft is equipped with a corresponding locking groove. When no air is supplied to the inner cavity of the support seat (1), the spring pushes the piston to move. When the annular groove on the piston rod moves to a position that is offset from the plane of the steel ball, each steel ball (5) moves out of the annular groove and is exposed, embedded in the locking groove of the aircraft, thereby achieving a locking connection between the emergency evacuation slide and the aircraft. When high-pressure air is supplied to the inner cavity of the support seat (1) to push the piston to move, when the annular groove on the piston rod moves to the plane of the steel ball (5), each steel ball (5) retracts into the annular groove and is released from the locking groove, thereby achieving the unlocking and separation of the emergency evacuation slide from the aircraft.

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