Spacecraft package buffer bag device

Abstract

The application provides a spacecraft packaging box buffer air bag device, which comprises a flexible air bag assembly, a frame assembly, a guide rod assembly, an elastic rubber rope and a pulley assembly, the frame assembly is fixed to one side of the spacecraft packaging box, the flexible air bag assembly is arranged in the frame assembly, and a plurality of elastic rubber ropes, a plurality of guide rod assemblies and a plurality of pulley assemblies are arranged on the two sides of the frame assembly. The spacecraft packaging box buffer air bag has the beneficial effects that, compared with a traditional buffer air bag, the influence of the inertial force in the vertical direction on air bag adjustment is eliminated, the buffer air bag is more suitable for vehicle transportation environment, and the problems of spacecraft transportation safety and transportation configuration resource shortage are solved; the buffer air bag can effectively relieve the ventilation pressure of a traditional air distribution equipment when the external air pressure changes rapidly, and reduce the risk of damage of a sealed container structure when the air distribution equipment is insufficiently ventilated.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of spacecraft storage and transportation protection, and particularly relates to a spacecraft packaging box buffer airbag device. BACKGROUND

[0002] During transportation, nitrogen needs to be filled into the packaging box to maintain the pressure in the box within a positive pressure range, so as to maintain the cleanliness and meet the storage and transportation requirements of the pollution indicators. In order to achieve the functional requirements of the packaging box, most spacecraft packaging boxes are equipped with gas distribution equipment and a large number of nitrogen cylinders for frequent charging and discharging during long-distance transportation. However, when the external pressure changes rapidly, due to the limited ventilation capacity of the gas distribution equipment, the pressure difference between the inside and outside of the box may exceed the bearing limit of the box structure, and carrying a large number of nitrogen cylinders also occupies very valuable transportation resources. Therefore, it is of great significance to design a pressure buffer device to relieve the ventilation pressure of the gas distribution equipment, reduce the charging and discharging frequency of nitrogen, and reduce the nitrogen usage, which is of great significance to the safety of spacecraft transportation and the saving of transportation resources. A flexible airbag is commonly used for pressure buffering in engineering, and the traditional buffer airbag of the gas storage tank is vertically placed, and the change in the volume of the airbag is controlled by balancing the weight above the airbag and the internal pressure in real time, so as to adjust the pressure in the gas storage tank. However, the balance state of the airbag according to the above principle will be greatly affected by the inertial force caused by the up-and-down pitching of the transportation vehicle body in the transportation environment, and the airbag cannot accurately adjust the gas pressure in the box, which will cause great disturbance to the pressure control system of the container. Therefore, it is necessary to invent a packaging box buffer airbag device for spacecraft transportation state. SUMMARY

[0003] Therefore, the application aims to provide a spacecraft packaging box buffer airbag device, which is designed to place a flexible airbag horizontally, exchange gas through a gas valve connected with the packaging box, and use lightweight rubber ropes to provide contraction force for the airbag, so as to eliminate the influence of the inertial force in the direction of gravity on the operation of the airbag, and meet the control requirements of the airbag extension and contraction under the transportation working condition.

[0004] To achieve the above-mentioned purposes, the technical scheme of the application is as follows:

[0005] A spacecraft packaging box buffer airbag device, wherein the buffer airbag device is connected with the spacecraft packaging box through a gas valve, and the buffer airbag device comprises a flexible airbag assembly, a frame assembly, a guide rod assembly, an elastic rubber rope and a pulley assembly, the frame assembly is fixed to one side of the spacecraft packaging box, the flexible airbag assembly is installed in the frame assembly, and a plurality of elastic rubber ropes, a plurality of guide rod assemblies and a plurality of pulley assemblies are installed on both sides of the frame assembly.

[0006] Further, the flexible air bag assembly comprises an air bag body, air exchange nozzles, side frames and air bag end face frames, the air bag body is provided with a plurality of air exchange nozzles on one side end face, the air exchange nozzles are used for connecting with the spacecraft packaging box to exchange gas, the side of the flexible air bag assembly is provided with air bag end face frames and a plurality of side frames, and the side frames and the air bag end face frames are used for connecting elastic rubber ropes.

[0007] Further, the material of the air bag body is a high-strength fiber and TPU combined material.

[0008] Further, the air bag end face shape-keeping plates are arranged on the two end faces of the air bag body.

[0009] Further, the frame assembly comprises a frame body, an air bag upper fixing frame, an air bag lower fixing frame, a first pulley mounting plate, a first guide rod fixing seat, a second guide rod fixing seat, a second pulley mounting plate, a rubber rope fixing hook, a third pulley mounting plate and a rubber rope fixing seat, one side of the frame body is connected with the spacecraft packaging box, the frame body is provided with the air bag upper fixing frame and the air bag lower fixing frame used for fixing the end face of the air bag body, the air bag upper fixing frame is arranged above the air bag lower fixing frame, and the two are symmetrically arranged, the frame body is further provided with the first guide rod fixing seat and the second guide rod fixing seat used for fixing the guide rod assembly, and the frame body is further provided with the rubber rope fixing hook and the rubber rope fixing seat used for fixing the elastic rubber rope, the end of each elastic rubber rope is tied to the air bag end face frame of the air bag body, and the frame body is further provided with the first pulley mounting plate, the second pulley mounting plate and the third pulley mounting plate, and the first pulley mounting plate, the second pulley mounting plate and the third pulley mounting plate are used for fixing the pulley assembly.

[0010] Further, the material of the frame body is a metal profile.

[0011] Further, the guide rod assembly comprises a guide rod body and a guide rod seat, one side of the guide rod seat is connected with the first guide rod fixing seat or the second guide rod fixing seat of the frame assembly, the other side of the guide rod seat is provided with the guide rod body, and the guide rod body penetrates through the frame assembly in the length direction.

[0012] Further, the buffer air bag device is placed in the heat preservation cover.

[0013] Compared with the prior art, the spacecraft packaging box buffer air bag device has the following advantages:

[0014] (1) The spacecraft packaging box buffer air bag device of the present application, compared with the traditional buffer air bag, eliminates the influence of vertical inertial force on air bag adjustment, is more suitable for vehicle transportation environment, and solves the problems of spacecraft transportation safety and transportation configuration resource shortage;

[0015] The buffer air bag can effectively alleviate the ventilation pressure of the traditional air distribution equipment when the external air pressure changes rapidly, and reduce the risk of damage to the sealed container structure when the air distribution equipment is insufficiently ventilated.

[0016] (2) The spacecraft packaging box buffer air bag device of the present application, the passive buffer air bag automatically adjusts with the external air pressure environment, does not rely on manual operation, does not increase the additional gas source, reduces the nitrogen consumption of the air distribution equipment, and can effectively alleviate the problem of spacecraft transportation resource shortage; compared with the traditional air bag, the present application increases a heat preservation cover outside the air bag, which can prevent the external temperature from affecting the temperature field inside the container through the air bag, and can also prevent the sun from directly irradiating the air bag, thereby prolonging the service life of the air bag.

[0017] (3) The spacecraft packaging box buffer air bag device of the present application, the air bag body is made of light and flexible material, the structure is different from that of the traditional organ type air bag, and a capsule type independent air chamber structure design is adopted, which maximally reduces the stiffness of the air bag expansion structure, reduces the structural damping, increases the expansion ratio, is beneficial to accurately control the tension value and improve the effective volume of the air bag; the traditional buffer air bag selects a spring as an elastic element, and the elastic element for controlling the expansion of the air bag in the present application selects a large-stroke low-stiffness rubber rope, which can maximally reduce the interference of the weight of the elastic element on the system. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings, which form a part of the present application, are used to provide further understanding of the present application, and the schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0019] Figure 1 The overall structure described in the embodiment of the present application is connected with the spacecraft schematic diagram;

[0020] Figure 2 The overall structure of the present application described in the embodiment of the present application is shown in the schematic diagram;

[0021] Figure 3 The flexible air bag assembly described in the embodiment of the present application is shown in the schematic diagram;

[0022] Figure 4 The frame assembly described in the embodiment of the present application is shown in the schematic diagram;

[0023] Figure 5 The guide rod assembly described in the embodiment of the present application is shown in the front view schematic diagram;

[0024] Figure 6 Figure 1 is a side view of a guide rod assembly according to an embodiment of the present application.

[0025] Legend of reference signs:

[0026] 1, flexible air bag assembly; 1.1, air bag body; 1.2, air vent connector; 1.3, side frame; 2, frame assembly; 2.1, frame body; 2.2, air bag upper fixing frame; 2.3, air bag lower fixing frame; 2.4, first pulley mounting plate; 2.5, first guide rod fixing seat; 2.6, second guide rod fixing seat; 2.7, second pulley mounting plate; 2.8, rubber rope fixing hook; 2.9, third pulley mounting plate; 2.10, rubber rope fixing seat; 3, guide rod assembly; 3.1, guide rod body; 3.2, guide rod seat; 4, elastic rubber rope; 5, pulley assembly; 6, air bag end face shaping plate. DETAILED DESCRIPTION

[0027] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0028] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0029] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0031] As Figures 1 to 6As shown in the figure, a spacecraft packaging box buffer airbag device, such as Figure 1 As shown, A represents a spacecraft packaging box, B is the buffer airbag device of the application, and according to the gas state equation, when the external pressure changes rapidly, the purpose of reducing the change rate of the pressure difference between the inside and outside of the box can be achieved by adjusting the volume change of the container. The box body is of a metal type, and its volume cannot be changed and adjusted, so a flexible airbag device is installed in series on the end face of the box body to keep the two in real-time communication. The flexible airbag is installed on the end face of the box body, and light and small-stiffness materials are selected, so that the volume change of the airbag can be truly reflected to the force and deformation of the rubber rope, so that the elastic coefficient of the rubber rope can be controlled to control the relationship between the volume change of the airbag and the air pressure. At the same time, according to the principle that the deformation coefficient of the rubber rope is as small as possible, the length of the rubber rope is reasonably selected and the stroke of the airbag is designed. When the external atmospheric pressure decreases, the equilibrium state of the airbag is broken, the internal pressure of the airbag is greater than the sum of the force of the rubber rope at this position and the external pressure, then the rubber rope is elongated, the tension is increased, and the force balance is reached again at the new position, at this time the pressure in the box is reduced, so that the change rate of the pressure difference between the inside and outside of the box is less than the change of the external air pressure, and the purpose of relieving the gas supply pressure of the gas distribution equipment is achieved.

[0032] The buffer airbag device of the embodiment is installed on the end face of the spacecraft packaging box, and is connected with the spacecraft packaging box through an air valve to ensure that the two can exchange gas. The buffer airbag device is placed in a heat preservation cover.

[0033] The flexible airbag assembly 1 adopts an airbag body 1.1 combined with high-strength fibers and TPU, has the characteristics of light weight, thin thickness, air tightness, aging resistance and high tensile strength; a plurality of air exchange connectors 1.2 are installed on the end face of the flexible airbag assembly 1, which are used to connect with the spacecraft packaging box to exchange gas; a plurality of side frames 1.3 are installed on the side face of the flexible airbag assembly 1, which are used to connect the elastic rubber ropes 4 and pass through the guide rod assembly 3 to maintain the shape of the airbag.

[0034] The frame assembly 2 is the main force body of the whole device, the frame body 2.1 is welded by metal profiles, and is connected with the spacecraft packaging box through bolts. The frame assembly 2 welds the airbag upper fixing frame 2.2 and the airbag lower fixing frame 2.3, which are used to fix the end face of the airbag body 1.1, so that the airbag body 1.1 can only stretch in one direction. The frame assembly 2 welds the first guide rod fixing seat 2.5 and the second guide rod fixing seat 2.6, which are used to fix the guide rod assembly 3 as the guide and support skeleton of the airbag body 1.1. The frame assembly 2 welds the rubber rope fixing hook 2.8 and the rubber rope fixing seat 2.10, which are used to fix the first end of a plurality of elastic rubber ropes 4, and the second end of the elastic rubber ropes 4 is tied to the airbag end face frame 1.4 of the airbag body 1.1. The frame assembly 2 welds the first pulley mounting plate 2.4, the second pulley mounting plate 2.7 and the third pulley mounting plate 2.9, which are used to fix the pulley assembly 5 to make the length of the elastic rubber rope 4 meet the requirements.

[0035] The guide rod assembly 3 is the main part of the air bag body 1.1 to keep the shape during movement, and the guide rod body 3.1 of the guide rod assembly 3 penetrates the length direction of the frame assembly 2 and is connected and fixed with the first guide rod fixing seat 2.5 or the second guide rod fixing seat 2.6 of the frame assembly 2 through the guide rod seat 3.2.

[0036] Taking the decrease of the external air pressure as an example, the working process is as follows:

[0037] (1) When the spacecraft is packed and shipped, the relative pressure value between the inside and outside of the spacecraft packaging box is initially P1, the initial volume of the air bag body 1.1 is V1, the elongation of the elastic rubber rope 4 is L1, and the movable end face of the air bag body 1.1 is at the middle position in the length direction of the frame assembly 2 at this time;

[0038] (2) With the decrease of the external air pressure ΔP, the force balance of the movable end face of the air bag body 1.1 is broken, the air bag body 1.1 starts to elongate under the action of the movable end face, and after reaching a new balance state, the relative pressure between the inside and outside of the box is P2, the volume of the air bag body 1.1 is V2, and the elongation of the elastic rubber rope 4 is L2;

[0039] (3) Since the volume V2 of the air bag body 1.1 is greater than V1, the absolute pressure P 内2 <P 内1 It can be seen that when the external pressure changes at the same time, the relative air pressure change value of the box under the action of the buffer air bag is less than that of the conventional packaging box, so that the ventilation amount of the gas distribution equipment can be reduced, and the safety of the packaging box can be increased.

[0040] Advantages of the present application:

[0041] (1) Compared with the traditional buffer air bag, the spacecraft packaging box buffer air bag can eliminate the influence of the vertical inertial force on the air bag adjustment, is more suitable for vehicle transportation environment, and solves the problems of spacecraft transportation safety and transportation configuration resource shortage.

[0042] (2) The buffer air bag can effectively alleviate the ventilation pressure of the traditional gas distribution equipment when the external air pressure changes rapidly, and reduce the risk of damage to the sealed container structure when the ventilation of the gas distribution equipment is insufficient.

[0043] (3) The passive buffer air bag automatically adjusts with the external air pressure environment, does not rely on manual operation, does not increase additional gas source, reduces the nitrogen consumption of the gas distribution equipment, and can effectively alleviate the problem of spacecraft transportation resource shortage.

[0044] (4) The air bag body is made of light and flexible material, the structure is different from that of the traditional organ type air bag, and the capsule type independent air chamber structure design is adopted, which maximally reduces the stiffness of the air bag stretching structure, reduces the structural damping, increases the stretching ratio, is beneficial to accurately control the tension value and improve the effective volume of the air bag.

[0045] (5) Traditional buffer air bag selects spring as elastic element, the elastic element of the air bag expansion and contraction of the application selects large stroke low stiffness rubber rope, can maximumly reduce the interference of the weight of elastic element to the system.

[0046] (6) Relative to the traditional air bag, the application increases the heat preservation cover outside the air bag, can prevent the outside temperature from causing the influence on the temperature field inside the container through the air bag, simultaneously can prevent the direct radiation of the sun to the air bag, prolongs the service life of the air bag.

[0047] The above only describes the preferred embodiments of the application and is not intended to limit the application, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A spacecraft shipping container cushion airbag apparatus, the cushion airbag apparatus connected to a spacecraft shipping container via a gas valve, characterized by: The buffer air bag device comprises a flexible air bag assembly (1), a frame assembly (2), a guide rod assembly (3), an elastic rubber rope (4) and a pulley assembly (5), the frame assembly (2) is fixed to one side of a spacecraft packaging box, the flexible air bag assembly (1) is installed inside the frame assembly (2), and a plurality of elastic rubber ropes (4), a plurality of guide rod assemblies (3) and a plurality of pulley assemblies (5) are respectively installed on the two sides of the frame assembly (2). The flexible air bag assembly (1) comprises an air bag body (1.1), an air inlet connector (1.2), a side frame (1.3) and an air bag end face frame, a plurality of air inlet connectors (1.2) are installed on one side of the air bag body (1.1), the air inlet connectors (1.2) are used to be connected with the spacecraft packaging box for gas exchange, the air bag end face frame and a plurality of side frames (1.3) are installed on the side of the flexible air bag assembly (1), and the side frames (1.3) and the air bag end face frame are used to be connected with the elastic rubber ropes (4). The frame assembly (2) comprises a frame body (2.1), an air bag upper fixing frame (2.2), an air bag lower fixing frame (2.3), a first pulley mounting plate (2.4), a first guide rod fixing seat (2.5), a second guide rod fixing seat (2.6), a second pulley mounting plate (2.7), a rubber rope fixing hook (2.8), a third pulley mounting plate (2.9) and a rubber rope fixing seat (2.10), one side of the frame body (2.1) is connected with the spacecraft packaging box, the air bag upper fixing frame (2.2) and the air bag lower fixing frame (2.3) for fixing the end face of the air bag body (1.1) are installed on one side of the frame body (2.1), the air bag upper fixing frame (2.2) is arranged above the air bag lower fixing frame (2.3) and is symmetrically arranged with the air bag lower fixing frame (2.3), the first guide rod fixing seat (2.5) and the second guide rod fixing seat (2.6) for fixing the guide rod assembly (3) are further installed on the frame body (2.1), the rubber rope fixing hook (2.8) and the rubber rope fixing seat (2.10) for fixing the elastic rubber rope (4) are further installed on the frame body (2.1), the end of each elastic rubber rope (4) is tied to the air bag end face frame of the air bag body (1.1), and the first pulley mounting plate (2.4), the second pulley mounting plate (2.7) and the third pulley mounting plate (2.9) are further installed on the frame body (2.1), and the first pulley mounting plate (2.4), the second pulley mounting plate (2.7) and the third pulley mounting plate (2.9) are used to fix the pulley assembly (5).

2. The spacecraft container cushion airbag device of claim 1, wherein: The material of the air bag body (1.1) is a high-strength fiber and TPU combined material.

3. The spacecraft container cushion airbag device of claim 1, wherein: Two air bag end face shape maintaining plates (6) are further arranged on the two end faces of the air bag body (1.1).

4. The spacecraft container cushion airbag device of claim 1, wherein: The material of the frame body (2.1) is a metal profile.

5. The spacecraft container cushion airbag device of claim 1, wherein: The guide rod assembly (3) comprises a guide rod body (3.1) and a guide rod base (3.2), one side of the guide rod base (3.2) is connected with the first guide rod fixing base (2.5) or the second guide rod fixing base (2.6) of the frame assembly (2), the other side of the guide rod base (3.2) is installed with the guide rod body (3.1), and the guide rod body (3.1) penetrates through the length direction of the frame assembly (2).

6. The spacecraft container cushion airbag device of claim 1, wherein: The heat preservation cover is also included, and the buffer air bag device is placed in the heat preservation cover.

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