Airship airbag sealing performance test equipment and test method

Abstract

The invention belongs to the technical field of airships, and particularly relates to airship airbag sealing performance testing equipment and a testing method.The airship airbag sealing performance testing equipment comprises a sealing box body, a stretching device, a pressing device, a temperature control device and a supercharging device, the top of the sealing box body is open, and an airbag sample piece covers the top of the sealing box body; the stretching device is used for applying tension to the airbag sample piece; the pressing device comprises a pressing piece, and the pressing piece is arranged above the air bag sample piece and used for pressing the air bag sample piece and the top of the sealing box body in a sealed mode, so that the air bag sample piece and the sealing box body form a sealed space; the temperature control device is used for adjusting the temperature of the sealed space; the supercharging device communicates with the sealed space and is used for adjusting the air pressure of the sealed space. By using the airship air bag sealing performance test equipment in the technical scheme, the problems that the air bag sealing performance test consumes manpower and material resources and is relatively high in cost can be effectively solved.

Description

Technical Field

[0001] The invention belongs to the technical field of airships, and in particular relates to an airship airbag sealing performance testing device and a testing method. Background Art

[0002] An airship is a lighter-than-air aircraft. Its main structure includes a huge streamlined hull, a pod under the hull, a tail surface for stability and control, and a propulsion device. The hull is the main part of the airship. The airbag of the hull is filled with a buoyant gas (hydrogen or helium) with a density lower than that of air to generate buoyancy to lift the airship. There are many process parts and structural parts installed on the airbag of the airship. Some structural parts even penetrate the airbag, which may cause air leakage.

[0003] In the prior art, in order to test the sealing performance of the airbag, the entire airbag is generally inflated and placed in a specially built boathouse. The boathouse sets the temperature and air pressure and other conditions according to the actual working environment of the airship, and calculates the sealing performance of the airbag by obtaining the temperature, atmospheric pressure, pressure difference between the inside and outside of the airbag and other data changes of the airbag within a certain period of time. If there is a leak, it is necessary to conduct a sealing test on the local position one by one, confirm the leaking position and then perform local repairs. The shortcomings of the prior art are that, first, the test needs to be carried out in a large warehouse with inflation conditions, the test site area is large, and the test site requirements are high; second, due to the inconsistent temperature distribution inside the airbag, many temperature sensors need to be arranged inside the airbag before the test to obtain the temperature conditions of various positions inside the airbag. The arrangement of hundreds of temperature sensors makes the operation complicated and consumes manpower and material resources; third, the test cannot obtain the specific location of the leak, and it takes a lot of time to determine the specific location of the leak after the test.

[0004] Therefore, it is urgent to propose an airship airbag sealing performance testing device and a testing method to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to at least solve the problem that the airbag sealing performance test consumes manpower and material resources and is costly. This purpose is achieved through the following technical solutions:

[0006] The first aspect of the present invention provides an airship airbag sealing performance testing device for testing the sealing performance of an airbag sample, wherein the airbag sample is penetrated by a structural member, and the airship airbag sealing performance testing device comprises:

[0007] A sealed box body, the top of which is open, and the airbag-like cover is arranged on the top of the sealed box body;

[0008] A stretching device, the stretching device is used to apply tension to the airbag-like member;

[0009] A pressing device, the pressing device comprising a pressing member, the pressing member being arranged above the airbag-like member and used to seal and press the airbag-like member and the top of the sealed box body, so that the airbag-like member and the sealed box body form a sealed space;

[0010] A temperature control device, the temperature control device is used to adjust the temperature of the sealed space;

[0011] A pressurizing device is communicated with the sealed space and is used to adjust the air pressure in the sealed space.

[0012] By using the airship airbag sealing performance test equipment in this technical solution, the sealing performance test of the airbag does not need to be carried out in a specially built warehouse. During the test, tension is applied to the airbag sample through a stretching device to simulate the tension to which the airbag is subjected in an actual working environment; the airbag sample is pressed against the top of the sealed box by a pressing device to create an airtight sealed space; the temperature of the sealed space is adjusted by a temperature control device to simulate the temperature of the airbag in an actual working environment; the sealed space is pressurized by a booster device to simulate the pressure to which the airbag is subjected in an actual working environment. After standing still for a period of time, the gas leakage of the airbag sample can be obtained based on the temperature change, air pressure change and volume of the sealed cavity, thereby providing an important basis for the sealing performance of the airbag. By adopting the airship airbag sealing performance testing equipment provided in this embodiment, there is no need for a large warehouse and a large floor area, the site requirements are low, and the testing cost is reduced; by testing the airbag sample to understand the overall sealing performance of the airbag, the test is more targeted, and there is no need to eliminate the leakage position, saving time; there is no need to inflate the entire airbag, and no need for a large number of sensors, and it is easy to adjust the temperature, tension and pressure of the airbag sample, saving manpower and material resources.

[0013] In addition, the airship airbag sealing performance testing device according to the present invention may also have the following additional technical features:

[0014] In some embodiments of the present invention, the stretching device includes a stretching component and a fixing component that are relatively arranged, the fixing component is used to fix one side of the airbag-like component and the sealed box, and the stretching component is used to pull the opposite side of the airbag-like component.

[0015] In some embodiments of the present invention, a cushion frame is provided on the top of the sealed box body, the fixing assembly includes a sample fixing piece, the airbag sample cover is provided on the cushion frame, the sample fixing piece is used to connect the side of the airbag sample and the cushion frame, and the pressing piece is used to press the airbag sample onto the cushion frame.

[0016] In some embodiments of the present invention, the stretching assembly includes a sample connecting piece and the tension driving piece, the sample connecting piece is used to be connected to the side of the airbag sample, the fixed end of the tension driving piece is connected to the sample connecting piece, and the movable end of the tension driving piece can abut against the sealed box body to apply tension to the airbag sample.

[0017] In some embodiments of the present invention, the stretching device also includes a guide assembly, the guide assembly includes a guide rod, the sample connector has a guide hole, one end of the guide rod is connected to the sealing box body, and the other end of the guide rod is passed through the guide hole, and the tension driving member can drive the sample connector to reciprocate along the guide rod.

[0018] In some embodiments of the present invention, the pressing device further includes a pressure driving member, and the pressure driving member is located above the pressing member and is used to apply pressure to the pressing member.

[0019] In some embodiments of the present invention, the temperature control device includes a box, a heating component and a refrigeration component, the box is arranged on the pressing part, the heating component is arranged inside the box, and the refrigeration component is arranged outside the box and connected to the box.

[0020] In some embodiments of the present invention, the refrigeration assembly includes a liquid nitrogen tank and a liquid nitrogen pump, the liquid nitrogen tank is connected to the liquid nitrogen pump, the liquid nitrogen pump is connected to the box, the liquid nitrogen tank stores liquid nitrogen, and the liquid nitrogen pump is used to pump the liquid nitrogen in the liquid nitrogen tank into the box.

[0021] In some embodiments of the present invention, the sealed box is connected to a temperature detection unit and a pressure detection unit, the temperature detection unit is used to detect the temperature of the sealed space, and the pressure detection unit is used to detect the air pressure of the sealed space.

[0022] The present invention also proposes a method for testing the sealing performance of an airship airbag, which includes the airship sealing performance testing device in the above embodiment. The airship airbag sealing performance testing method includes the following steps:

[0023] S100, covering the top of the sealed box with the airbag sample;

[0024] S200, applying a preset tension to the airbag sample by the stretching device;

[0025] S300, sealing and pressing the airbag-like component and the top of the sealed box body by a pressing device, so that the airbag-like component and the sealed box body form a sealed space;

[0026] S400, adjusting the temperature of the sealed space by the temperature control device so that the temperature of the sealed space reaches a preset temperature; pressurizing the sealed space by the pressurizing device so that the air pressure of the sealed space reaches a preset air pressure;

[0027] S500, obtaining the air pressure change of the sealed space and the temperature change of the sealed space within a preset time;

[0028] S600, calculating the change in gas mass in the sealed space by using an ideal gas state equation according to the change in gas pressure in the sealed space, the change in temperature in the sealed space and the volume of the sealed space;

[0029] S700. Determine the sealing performance of the airbag sample according to the change in gas mass in the sealed space. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0031] Figure 1 The schematic diagram of the structure of the airbag sample according to the embodiment of the present invention is shown schematically;

[0032] Figure 2 The structural diagram of the airship airbag sealing performance testing device according to the embodiment of the present invention is schematically shown;

[0033] Figure 3 A partial structural diagram of an airship airbag sealing performance testing device according to an embodiment of the present invention is schematically shown;

[0034] Figure 4 The schematic diagram of the assembly structure of the cushion frame and the stretching device according to the embodiment of the present invention is schematically shown;

[0035] Figure 5 schematically shows an exploded view of a stretching assembly according to an embodiment of the present invention;

[0036] Figure 6 The schematic diagram of the structure of the sample connector according to the embodiment of the present invention is shown schematically;

[0037] Figure 7 The flowchart of the method for testing the sealing performance of an airship airbag according to an embodiment of the present invention is schematically shown.

[0038] The reference numerals in the accompanying drawings represent the following:

[0039] 10. Airbag sample; 11. Interface;

[0040] 100, rack; 110, operation panel; 120, hydraulic station;

[0041] 200, sealed box; 210, cushion frame; 210a, positioning ring groove; 220, extension part; 230, first interface; 240, second interface;

[0042] 300, stretching device;

[0043] 310, stretching assembly; 311, sample connecting piece; 3111, clamping part; 3112, guide part; 3113, driving piece connecting part; 311a, guide hole; 311b, avoidance hole; 312, tension driving piece; 313, clamping plate; 314, clamping plate connecting piece;

[0044] 320, fixing assembly; 321, sample fixing part; 322, cushion frame connecting part;

[0045] 330, guide assembly; 331, guide rod; 332, guide sleeve; 333, guide rod connecting plate;

[0046] 400, clamping device; 410, clamping member; 420, pressurizing driving member;

[0047] 500. temperature control device; 510. box body; 520. liquid nitrogen tank. DETAILED DESCRIPTION

[0048] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0049] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0050] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0051] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both above and below orientations.

[0052] Figure 1 The structural diagram of the airbag-like component 10 according to an embodiment of the present invention is schematically shown. Figure 2 The structural diagram of the airship airbag sealing performance testing device according to the embodiment of the present invention is schematically shown. Figure 1 and Figure 2 As shown, the present invention proposes an airship airbag sealing performance testing device, which is used to test the sealing performance of an airbag sample 10. The airbag sample 10 is penetrated by structural parts. The airship airbag sealing performance testing device comprises a sealing box 200, a stretching device 300, a pressing device 400, a temperature control device 500 and a pressurizing device. The top of the sealing box 200 is open, and the airbag sample 10 is covered on the top of the sealing box 200; the stretching device 300 is used to apply tension to the airbag sample 10; the pressing device 400 comprises a pressing member 410, which is arranged above the airbag sample 10 and is used to seal and press the top of the airbag sample 10 and the sealing box 200, so that the airbag sample 10 and the sealing box 200 form a sealed space; the temperature control device 500 is used to adjust the temperature of the sealed space; the pressurizing device is connected to the sealed space and is used to adjust the air pressure in the sealed space.

[0053] In actual working conditions, airbag leakage usually occurs at the interface 11 where the airbag and the structural member are connected. Therefore, during the test, the interface 11 can be tested. As long as the interface 11 does not leak, it can be considered that the overall sealing performance of the airbag is good, and there is no need to test the sealing performance of the airbag as a whole. Therefore, the airbag sample 10 used in the test is penetrated by the structural member. By adopting the airship airbag sealing performance test equipment provided in this embodiment, the sealing performance test of the airbag does not need to be carried out in a specially built warehouse. During the test, tension is applied to the airbag sample 10 by the stretching device 300 to simulate the tension to which the airbag is subjected in the actual working environment; the airbag sample 10 is pressed against the top of the sealing box 200 by the pressing device 400 to create a closed sealed space; the temperature of the sealed space is adjusted by the temperature control device 500 to simulate the temperature of the airbag in the actual working environment; the sealed space is pressurized by the booster device to simulate the pressure to which the airbag is subjected in the actual working environment. After standing for a period of time, the gas leakage of the airbag sample 10 can be obtained according to the temperature change, air pressure change and volume of the sealed cavity, thereby providing an important basis for the sealing performance of the airbag. By adopting the airship airbag sealing performance test equipment provided by this embodiment, no large warehouse and large floor space are required, the site requirements are low, and the testing cost is reduced; by testing the airbag sample 10 to understand the overall sealing performance of the airbag, the test is more targeted, and there is no need to eliminate the leakage position, saving time; there is no need to inflate the entire airbag, and no need for a large number of sensors, and it is easy to adjust the temperature, tension and pressure of the airbag sample 10, saving manpower and material resources.

[0054] In actual use, a layer of skin is generally provided on the outside of the airbag. The skin is a protective layer covering the outside of the airbag, usually made of lightweight synthetic fibers such as polyester or nylon. The main function of the skin is to protect the airbag from damage by the external environment, such as ultraviolet rays, moisture, temperature changes, etc., and to enhance the structural strength and durability of the airbag. In this embodiment, the structure and material of the airbag sample 10 are consistent with those of the airbag in actual working conditions, and a skin is provided on its surface. Optionally, see Figure 1 The airbag-like member 10 is roughly square in shape to facilitate application of lateral and longitudinal tension thereto.

[0055] Further, see Figure 2 The airbag sealing performance testing device provided in this embodiment further includes a frame 100. The frame 100 is a steel frame structure, including a vertical direction ( Figure 1Four vertical poles are arranged on the frame 100 (in the Z-axis direction), and two adjacent vertical poles are fixedly connected by connecting rods at the top and the bottom. A support rod is arranged at the bottom of the frame 100, and the support rod is used to support the sealing box 200. Optionally, an operation panel 110 is arranged on the frame 100, and the operator can operate on the operation panel 110 to realize the control of each device. For example, the preset tension applied by the stretching device 300 to the airbag-like component 10, the pressing force applied by the pressing member 410 to the airbag-like component 10, the preset temperature of the sealed space, and the preset air pressure of the sealed space can be set on the operation panel 110. Optionally, the operation panel 110 can be a touch screen type or a button type, which can be set according to the specific needs of use.

[0056] Further, the sealed box 200 is roughly a cubic structure, including four side panels and a bottom plate connected to the bottom of the side panels, and the adjacent side panels and the side panels and the bottom plate are sealed to prevent air leakage. Optionally, the sealed box 200 is welded with steel plates, and no leakage occurs at the welding parts, and the sealed box 200 can withstand an air pressure of not less than 100000Pa and the pressure of the clamping device 400. It can be understood that the sealed box 200 should be able to withstand certain pressure changes and temperature changes to ensure that it will not be deformed when the internal air pressure changes, and at the same time, there will be no thermal expansion and contraction when the temperature changes. Further, the bottom plate has an extension 220 that exceeds the side panel, and the extension 220 is provided with a through hole. Accordingly, the connector at the bottom of the rack 100 is provided with a mounting hole corresponding to the position of the through hole. When the sealed box 200 and the rack 100 are installed, bolts may be used to pass through the through holes and the installation holes in sequence to fix the sealed box 200 and the rack 100 together.

[0057] Further, see Figure 2 The temperature control device 500 includes a box body 510 , a heating component and a refrigeration component. The box body 510 is arranged on the pressing member 410 , the heating component is arranged inside the box body 510 , and the refrigeration component is arranged outside the box body 510 and communicated with the box body 510 .

[0058] Optionally, the box body 510 is a rectangular structure, and the pressing piece 410 supports the box body 510. Since the middle part of the pressing piece 410 is hollowed out, it is beneficial to improve the heat exchange rate between the box body 510 and the airbag-like component 10. Optionally, the heating component includes a plurality of resistance wires, and the plurality of resistance wires are evenly distributed inside the box body 510. The shape of the resistance wires can be straight, spiral or wavy, etc., and the plurality of resistance wires are arranged in parallel or distributed in a mesh. It can be understood that the heating component is used to heat up the airbag-like component 10, and the refrigeration component is used to cool down the airbag-like component 10, so that the temperature control device 500 has a wide temperature adjustment range, ensuring that the temperature control device 500 can adjust the temperature according to the actual working environment of the airbag-like component 10.

[0059] Further, the refrigeration assembly includes a liquid nitrogen tank 520 and a liquid nitrogen pump, the liquid nitrogen tank 520 is connected to the liquid nitrogen pump, the liquid nitrogen pump is connected to the box 510, the liquid nitrogen tank 520 stores liquid nitrogen, and the liquid nitrogen pump is used to pump the liquid nitrogen in the liquid nitrogen tank 520 into the box 510. Optionally, the liquid nitrogen tank 520 is placed on the top of the rack 100 to reduce the occupation of the ground area.

[0060] Furthermore, the booster device can introduce nitrogen or air into the sealed space, and adjust the air pressure of the sealed space by controlling the amount of gas entering.

[0061] Further, the sealed box 200 is connected with a temperature detection unit and a pressure detection unit. Optionally, a first interface 230 for connecting the temperature detection unit is provided on the sealed box 200. The temperature detection unit is used to detect the temperature of the sealed space. Temperature changes will affect the changes in the air pressure of the sealed space. During the test, it is necessary to eliminate the changes in the gas pressure caused by the temperature effect, so it is necessary to measure the temperature. During the test, the temperature control device 500 is controlled according to the detection result of the temperature detection unit to ensure that the temperature of the sealed space is equal to the preset temperature. Optionally, the temperature detection unit can be a temperature sensor. Optionally, a second interface 240 for connecting the pressure detection unit is provided on the sealed box 200. The pressure detection unit is used to detect the air pressure of the sealed space. The boosting device is controlled according to the measurement result of the pressure detection unit to ensure that the air pressure of the sealed space is equal to the preset pressure. Preferably, the pressure detection unit can be a differential pressure sensor. In order to eliminate the influence of atmospheric pressure changes on the test results, the atmospheric pressure is recorded by a pressure sensor outside the sealed box 200, and then the actual absolute pressure of the sealed space is calculated by the pressure difference and the atmospheric pressure, and the change value of the absolute pressure is used to calculate the change in gas mass.

[0062] Further, Figure 3 The partial structural diagram of the airship airbag sealing performance testing device according to the embodiment of the present invention is schematically shown. Figure 2 and Figure 3The pressing device 400 further includes a pressure driving member 420, which is located above the pressing member 410 and is used to apply pressure to the pressing member 410. The pressing device 400 presses the airbag-like member 10 on the top of the sealed box 200.

[0063] Optionally, the pressing member 410 may be a U-shaped structure, which presses the outer side of the airbag-like component 10 and the top edge of the sealed box 200. In addition, by setting the pressing member 410 in a U-shaped structure, the temperature control box can be set on the pressing member 410, and the pressing member 410 plays a role in supporting the temperature control box. At the same time, the temperature of the temperature control box can be better transferred to the airbag-like component 10 and the inside of the sealed space. Preferably, the pressing member 410 has sufficient flatness, and the bottom surface has a certain degree of roughness to prevent the pressing member 410 from slipping.

[0064] It can be understood that the setting of the pressurized driving member 420 can press the pressing member 410 downward, thereby increasing the pressing force between the airbag-like member 10 and the sealed box 200, and ensuring good sealing between the airbag-like member 10 and the sealed box 200. Exemplarily, the fixed end of the pressurized driving member 420 is connected to the top of the frame 100, and the movable end of the pressurized driving member 420 can reciprocate in the vertical direction. Optionally, the movable end of the pressurized driving member 420 is connected with a pressure claw, and there are two contact surfaces between the pressure claw and the pressing member 410. By setting the pressure claw, the contact area between the movable end and the pressing member 410 can be increased, so that the pressure of the pressing member 410 is more uniform. In this embodiment, the pressurized driving member 420 is provided with multiple groups, and the multiple groups of pressurized driving members 420 are arranged around the pressing member 410. Optionally, two pressurized driving members 420 are arranged on each side of the pressing member 410. In other embodiments, the number of the pressurizing drive member 420 can be two, three, four or five, etc., which can be set according to the use requirements. In this embodiment, the pressurizing drive member 420 is a hydraulic cylinder, and a hydraulic station 120 is arranged on the top of the frame 100. The hydraulic station 120 is connected to the hydraulic cylinder through an oil pipe to control the action of the hydraulic cylinder. In other embodiments, the pressurizing drive member 420 can also be a cylinder or a motor.

[0065] Further, Figure 4 The schematic diagram of the assembly structure of the cushion frame 210 and the stretching device 300 according to the embodiment of the present invention is schematically shown. Figure 3 and Figure 4 The stretching device 300 includes a stretching component 310 and a fixing component 320 that are relatively arranged. The fixing component 320 is used to fix one side of the airbag-like component 10 and the sealing box 200, and the stretching component 310 is used to pull the opposite side of the airbag-like component 10.

[0066] It can be understood that there are two groups of stretching components 310, and the two groups of stretching components 310 are respectively arranged at two adjacent sides of the airbag-like component 10, so as to perform transverse ( Figure 4 X-axis direction) and longitudinal direction ( Figure 4 Accordingly, two sets of fixing components 320 are provided, and the fixing components 320 and the stretching components 310 are arranged opposite to each other. When testing, one side of the airbag sample 10 is first fixed by the fixing components 320 and the sealing box 200, and then the stretching components 310 on the opposite side are started for pulling.

[0067] Continue to see Figure 3 and Figure 4 A cushion frame 210 is provided on the top of the sealed box body 200, and the fixing assembly 320 includes a sample fixing member 321. The airbag sample 10 is covered on the cushion frame 210. The sample fixing member 321 is used to fix the side of the airbag sample 10 and the cushion frame 210, and the pressing member 410 is used to press the airbag sample 10 on the cushion frame 210.

[0068] Optionally, the cushion frame 210 and the sealing box 200 can be an integrally formed structure or a split structure. Optionally, a positioning ring groove 210a for placing a sealing ring is provided on the cushion frame 210. When the pressing member 410 presses the airbag sample 10 onto the cushion frame 210, the bottom surface of the airbag sample 10 and the sealing ring are in sealed contact. Therefore, the provision of the sealing ring increases the sealing between the airbag sample 10 and the cushion frame 210, and prevents the gas in the sealed space from leaking from the gap between the airbag sample 10 and the cushion frame 210, resulting in deviations in the measurement structure. It can be understood that the provision of the positioning ring groove 210a limits the position of the sealing ring, and at the same time, increases the contact area between the sealing ring and the cushion frame 210, thereby increasing the sealing effect. Optionally, in order to further increase the sealing between the cushion frame 210 and the airbag sample 10, the number of sealing rings can be multiple, and accordingly, multiple positioning ring grooves 210a are provided on the cushion frame 210. Exemplarily, the number of sealing rings is two, three or four, etc.

[0069] Optionally, the sample fixture 321 is a strip-shaped plate, and its length is greater than or equal to the length of the side of the airbag sample 10, so as to ensure that the side of the airbag sample 10 can be completely clamped between the sample fixture 321 and the gasket frame 210. To prevent the airbag sample 10 from slipping, an anti-slip pad can be provided on the surface of the sample fixture 321 in contact with the airbag sample 10. The anti-slip pad can be a rubber pad, a silica gel pad or other airtight structures with high temperature and low temperature resistance. Optionally, the sample fixture 321 is connected to the gasket frame 210 through a gasket frame connector 322. In this embodiment, the gasket frame connector 322 includes two horizontally arranged horizontal parts and a vertical part connecting the two horizontal parts, and its cross-section is in a C shape. When connecting, the sample fixture 321 and the gasket frame 210 are located between the two horizontal parts. Through holes are respectively provided on the vertical part and the horizontal part at the bottom. Screws or bolts can be used to connect the vertical part and the side of the sample fixture 321, and connect the horizontal part at the bottom and the gasket frame 210, so as to realize the connection between the sample fixture 321 and the gasket frame 210. Preferably, a plurality of gasket frame connectors 322 are provided, and the plurality of gasket frame connectors 322 are arranged at intervals along the length direction of the sample fixture 321. By setting the sample fixture 321 as a strip-shaped plate and using a plurality of sample fixtures 321 to connect with the gasket frame 210, the force on the airbag sample 10 can be balanced.

[0070] Further, Figure 5 Fig. shows an exploded view of the stretching assembly 310 according to an embodiment of the present invention schematically. Figure 6 Fig. schematically shows a structural diagram of the sample connector 311 according to an embodiment of the present invention. Refer to Figures 4 to 6 , the stretching assembly 310 includes a sample connector 311 and a tension driving member 312. The sample connector 311 is used to connect with the side of the airbag sample 10. The fixed end of the tension driving member 312 is connected to the sample connector 311, and the movable end of the tension driving member 312 can abut against the sealed box body 200 to apply tension to the airbag sample 10.

[0071] During the test, first fix one side of the airbag sample 10 on the gasket frame 210 through the sample fixture 321, and then start the tension driving member 312 on the opposite side. When a contact force is generated between the movable end of the tension driving member 312 and the sealed box body 200, the airbag sample 10 will be stretched. During the test, the tension applied to the airbag sample 10 can be adjusted by adjusting the extension amount of the movable end. Optionally, the tension driving member 312 can be a hydraulic cylinder, a pneumatic cylinder or a motor, etc.

[0072] Optionally, the sample connector 311 includes a clamping portion 3111, which is used to connect with the airbag connector. The stretching assembly 310 also includes a splint 313, and the side of the airbag sample 10 can be clamped between the splint 313 and the clamping portion 3111. Optionally, the splint 313 and the clamping portion 3111 of the sample connector 311 are both strip-shaped plate structures. Further, the splint 313 and the clamping portion 3111 are connected by a splint connector 314. Optionally, the splint connector 314 includes a vertical portion and a horizontal portion, and the vertical portion and the horizontal portion are vertically connected to form an L-shaped structure. Through holes are provided on the vertical portion and the horizontal portion. When assembling, bolts or screws are used to connect the vertical portion and the side of the splint 313, and the bottom of the horizontal portion is connected to the sample connector 311, so as to achieve the connection between the splint 313 and the sample connector 311. Preferably, a plurality of splint connectors 314 are provided, and the plurality of splint connectors 314 are spaced apart along the length direction of the clamping portion 3111. In this embodiment, the number of splint connectors 314 is four, and in other embodiments, the number of splint connectors 314 may be two, three, five or six, etc., which is not specifically limited here.

[0073] Optionally, the sample connector 311 also includes a driver connector 3113, which is used to connect to the fixed end of the tension driver 312. The driver connector 3113 is located below the clamping portion 3111. Optionally, the driver connector 3113 is a plate-like structure, which is provided with an escape opening that allows the movable end of the tension driver 312 to pass through. The driver connector 3113 is also provided with a through hole for connecting to the tension driver 312. Exemplarily, the fixed end of the tension driver 312 is provided with a connecting disk, and the connecting disk is provided with a through hole. When assembling the tension driver 312 and the sample connector 311, bolts can be used to pass through the through holes of the connecting disk and the through holes on the driver connector 3113 in sequence, and then locked with nuts.

[0074] Furthermore, the stretching device 300 also includes a guide assembly 330, which includes a guide rod 331. The sample connector 311 has a guide hole 311a. One end of the guide rod 331 is connected to the sealing box 200, and the other end of the guide rod 331 is passed through the guide hole 311a. The tension driving member 312 can drive the sample connector 311 to move back and forth along the guide rod 331.

[0075] Optionally, the sample connector 311 further includes a guide portion 3112, and the guide hole 311a is provided on the guide portion 3112. In the present embodiment, there are two guide portions 3112, and the two guide portions 3112 are respectively located on both sides of the driver connector 3113. The provision of the guide portion 3112 and the guide rod can prevent the sample connector 311 from tilting during movement, so that the airbag sample 10 is subjected to balanced tension. In the present embodiment, the two ends of the driver connector 3113 are respectively connected to the two guide portions 3112, and the overall structural strength is relatively high. In other embodiments, the driver connector 3113 can also be connected to the clamping portion 3111.

[0076] Optionally, the guide assembly 330 further includes a guide sleeve 332, which is inserted into the guide hole 311a. One end of the guide sleeve 332 is provided with a ridge extending radially outward along the guide sleeve 332, and the ridge is used to connect with the guide portion 3112. The axial length of the guide sleeve 332 is greater than the axial length of the guide hole 311a, so that the guide rod 331 can be effectively prevented from tilting.

[0077] Optionally, the wire assembly further includes a guide rod connecting plate 333, the guide rod connecting plate 333 is connected to the side plate of the sealed box 200, and one end of the guide rod 331 away from the guide hole 311a is connected to the guide rod connecting plate 333. Optionally, the guide rod connecting plate 333 can be connected to the sealed box 200 by bolts, or can be fixed to the sealed box 200 by welding. Optionally, when the movable end of the tension driving member 312 extends forward, it can abut against the guide rod connecting plate 333.

[0078] This embodiment also provides a method for testing the sealing performance of an airship airbag. Based on the airship sealing performance testing device in the above embodiment, the method for testing the sealing performance of an airship airbag includes the following steps:

[0079] S100, covering the airbag sample 10 on the top of the sealed box 200;

[0080] S200, applying a preset tension to the airbag sample 10 through the stretching device 300;

[0081] S300, the airbag sample 10 and the top of the sealed box 200 are sealed and pressed by the pressing device 400, so that the airbag sample 10 and the sealed box 200 form a sealed space;

[0082] S400, adjusting the temperature of the sealed space by the temperature control device 500 so that the temperature of the sealed space reaches a preset temperature; pressurizing the sealed space by the pressurizing device so that the air pressure of the sealed space reaches a preset air pressure;

[0083] S500, obtaining the air pressure change and temperature change of the sealed space within a preset time;

[0084] S600, calculating the change in gas mass in the sealed space by using an ideal gas state equation according to the change in gas pressure in the sealed space, the change in temperature in the sealed space, and the volume of the sealed space;

[0085] S700. Determine the sealing performance of the airbag sample 10 according to the change in gas mass in the sealed space.

[0086] By adopting the airship airbag sealing performance test method provided in this embodiment, the inflation test of the entire airbag is transformed into a test of the airbag sample 10. There is no need to use a large warehouse with a large area and inflation conditions. The test process is more convenient, the test environment is easy to control, and manpower and material resources can be effectively saved.

[0087] Furthermore, S100 also includes placing the pressing piece 410 on the airbag-like component 10 so that the side of the airbag-like component 10 is pressed on the cushion frame 210 .

[0088] Further, S200 includes fixing two adjacent side panels of the airbag sample 10 on the cushion frame 210 through the sample fixing member 321, clamping the other two side edges between the sample connecting member 311 and the clamping plate 313, and fixing them through the clamping plate connecting member 314, and then driving the tension driving member 312 to extend its movable end and abut against the guide rod connecting plate 333, so that the airbag sample 10 is stretched until the tension of the airbag sample 10 reaches the preset tension. The preset tension is set according to the tension of the airbag in the real working environment.

[0089] Further, S300 includes driving the pressure driving member 420 so that its movable end presses the pressing member 410 downward until the airbag-like member 10 and the cushion frame 210 are in sealing contact.

[0090] Further, S400 includes starting a heating component or a cooling component to adjust the temperature of the sealed space, and controlling the heating component or the cooling component according to the result measured by the temperature detection unit so that the temperature of the sealed space reaches a preset temperature, and the preset temperature is set according to the temperature of the airbag in the real working environment. Starting a pressurizing device to pressurize the sealed space, and controlling the pressurizing device according to the result measured by the pressure detection unit so that the air pressure of the sealed space reaches a preset air pressure, and the preset air pressure is set according to the air pressure that the airbag is subjected to in the real working environment.

[0091] Further, after S100 to S400 are completed, the system is kept at rest for a preset time, and the preset time is set according to actual needs. After the rest is completed, the air pressure change in the sealed space and the temperature change in the sealed space are obtained. Preferably, in order to eliminate the influence of atmospheric pressure changes on the test results, the pressure difference between the sealed space and the atmosphere is recorded by a pressure differential sensor, and the atmospheric pressure is recorded by a pressure sensor outside the sealed box 200, and then the actual absolute pressure of the sealed space is calculated by the pressure difference and the atmospheric pressure, and the change in the absolute pressure is used to calculate the change in gas mass.

[0092] Further, in S600, the ideal gas state equation is: pV=nRT. In the formula: p is pressure, V is gas volume, T is temperature, n is the amount of gas, and R is the molar gas constant. The leakage degree of the airbag sample 10 is measured by the obtained gas mass change.

[0093] In one embodiment, S700 includes when the gas mass change exceeds a certain threshold, it is considered that the airbag sample 10 is leaking. In another embodiment, S700 includes comparing the test results of the airbag sample 10 with the interface 11 and the test results of the airbag sample 10 without the interface 11. If the difference in the gas mass change between the two is less than 5%, it is considered that there is no leakage in the interface 11. To increase the accuracy of the test results, the airbag sample 10 with the interface 11 and the airbag sample 10 without the interface 11 can be tested more than three times.

[0094] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An airship airbag sealing performance testing device, used for testing the sealing performance of an airbag sample (10), wherein the airbag sample (10) is penetrated by a structural member, characterized in that: The airship airbag sealing performance testing equipment includes: A sealed box (200), the top of the sealed box (200) is open, and the airbag-like component (10) is covered on the top of the sealed box (200); A stretching device (300), the stretching device (300) is used to apply tension to the airbag-like member (10); A pressing device (400), the pressing device (400) comprising a pressing member (410), the pressing member (410) being arranged above the airbag-like member (10) and used to seal and press the top of the airbag-like member (10) and the sealed box (200) so that the airbag-like member (10) and the sealed box (200) form a sealed space; A temperature control device (500), the temperature control device (500) being used to adjust the temperature of the sealed space; A booster device is communicated with the sealed space and is used to adjust the air pressure in the sealed space.

2. The airship airbag sealing performance testing equipment according to claim 1, characterized in that: The stretching device (300) comprises a stretching component (310) and a fixing component (320) which are arranged opposite to each other, wherein the fixing component (320) is used to fix one side of the airbag-like component (10) and the sealing box (200), and the stretching component (310) is used to pull the opposite side of the airbag-like component (10).

3. The airship airbag sealing performance testing equipment according to claim 2, characterized in that: A cushion frame (210) is arranged on the top of the sealed box body (200), the fixing assembly (320) includes a sample fixing member (321), the airbag sample (10) is covered on the cushion frame (210), the sample fixing member (321) is used to fix the side of the airbag sample (10) and the cushion frame (210), and the pressing member (410) is used to press the airbag sample (10) onto the cushion frame (210).

4. The airship airbag sealing performance testing equipment according to claim 2, characterized in that: The stretching assembly (310) comprises a sample connecting piece (311) and a tension driving piece (312), wherein the sample connecting piece (311) is used to be connected to the side of the airbag sample (10), the fixed end of the tension driving piece (312) is connected to the sample connecting piece (311), and the movable end of the tension driving piece (312) can abut against the sealing box (200) to apply tension to the airbag sample (10).

5. The airship airbag sealing performance testing equipment according to claim 4, characterized in that: The stretching device (300) further comprises a guide assembly (330), wherein the guide assembly (330) comprises a guide rod (331), the sample connecting member (311) has a guide hole (311a), one end of the guide rod (331) is connected to the sealing box (200), and the other end of the guide rod (331) is passed through the guide hole (311a), and the tension driving member (312) can drive the sample connecting member (311) to move back and forth along the guide rod (331).

6. The airship airbag sealing performance testing equipment according to claim 1, characterized in that: The pressing device (400) further comprises a pressure driving member (420), wherein the pressure driving member (420) is located above the pressing member (410) and is used to apply pressure to the pressing member (410).

7. The airship airbag sealing performance testing equipment according to claim 1, characterized in that: The temperature control device (500) comprises a box (510), a heating component and a refrigeration component, wherein the box (510) is arranged on the pressing member (410), the heating component is arranged inside the box (510), and the refrigeration component is arranged outside the box (510) and is in communication with the box (510).

8. The airship airbag sealing performance testing equipment according to claim 7, characterized in that: The refrigeration assembly comprises a liquid nitrogen tank (520) and a liquid nitrogen pump, the liquid nitrogen tank (520) and the liquid nitrogen pump are in communication, the liquid nitrogen pump and the box (510) are in communication, the liquid nitrogen tank (520) stores liquid nitrogen, and the liquid nitrogen pump is used to pump the liquid nitrogen in the liquid nitrogen tank (520) into the box (510).

9. The airship airbag sealing performance testing device according to any one of claims 1 to 8, characterized in that: The sealed box (200) is connected to a temperature detection unit and a pressure detection unit, the temperature detection unit is used to detect the temperature of the sealed space, and the pressure detection unit is used to detect the air pressure of the sealed space.

10. A method for testing the sealing performance of an airship airbag, characterized in that: Based on the airship sealing performance testing device according to any one of claims 1 to 9, the airship airbag sealing performance testing method comprises the following steps: S100, covering the airbag sample (10) on the top of the sealed box (200); S200, applying a preset tension to the airbag sample (10) by means of the stretching device (300); S300, using a pressing device (400) to seal and press the top of the airbag-like component (10) and the sealed box body (200) so that the airbag-like component (10) and the sealed box body (200) form a sealed space; S400, adjusting the temperature of the sealed space by means of the temperature control device (500) so that the temperature of the sealed space reaches a preset temperature; pressurizing the sealed space by means of the pressurizing device so that the air pressure of the sealed space reaches a preset air pressure; S500, obtaining the air pressure change of the sealed space and the temperature change of the sealed space within a preset time; S600, calculating the change in gas mass in the sealed space by using an ideal gas state equation according to the change in gas pressure in the sealed space, the change in temperature in the sealed space and the volume of the sealed space; S700, judging the sealing performance of the airbag sample (10) according to the change in the gas mass in the sealed space.

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