Airship airbag sealing performance test equipment

Abstract

The utility model belongs to the technical field of airships, and particularly relates to airship air bag sealing performance testing equipment which 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 air bag sample piece cover is arranged on 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 utility model belongs to the technical field of airships, and particularly relates to a testing device for the airtight performance of an airship airbag. Background Art

[0002] An airship is an aircraft lighter than air, and its main structures include a huge streamlined hull, a gondola located below the hull, a tailplane for stability control, and a propulsion device. The hull is the main part of the airship. The airbag inside the hull is filled with a lifting gas (hydrogen or helium) with a density smaller than that of air, so as to generate buoyancy to make the airship take off. A large number of process parts and structural parts are installed on the airbag of the airship, and some structural parts even penetrate the airbag, which may lead to air leakage.

[0003] In the prior art, in order to test the airtight performance of the airbag, generally, the whole airbag is inflated, and the airbag is placed in a specially built hangar. The hangar is set with conditions such as temperature and air pressure according to the actual working environment of the airship. By obtaining data changes such as the temperature, atmospheric pressure, and pressure difference inside and outside the airbag within a certain period of time, the airtight performance of the airbag is calculated. If there is a leakage situation, it is necessary to conduct a sealing test on each local position one by one, confirm the leakage position and then conduct local repair. The deficiencies of the prior art are as follows: First, the test needs to be carried out in a large warehouse with inflation conditions. The test site area is large and the requirements for the test site are high; Second, due to the inconsistent temperature distribution inside the airbag, a large number of temperature sensors need to be arranged inside the airbag before the test to obtain the temperature conditions at each position inside the airbag. The arrangement of hundreds of temperature sensors makes the operation complex and consumes a lot of manpower and material resources; Third, the test cannot obtain the specific leakage position, and a large amount of time is still required to determine the specific leakage position after the test.

[0004] Therefore, it is urgent to propose a testing device for the airtight performance of an airship airbag to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to at least solve the problems of high manpower and material consumption and high cost in testing the airtight performance of the airbag. This purpose is achieved by the following technical solutions:

[0006] A first aspect of the utility model proposes a testing device for the airtight performance of an airship airbag, which is used to test the airtight performance of an airbag sample. A structural part penetrates through the airbag sample. The testing device for the airtight performance of the airship airbag includes:

[0007] A sealed box body, the top of the sealed box body is open, and the airbag sample covers the top of the sealed box body;

[0008] A stretching device, which is used to apply tension to the airbag sample;

[0009] A pressing device, the pressing device includes a pressing member, the pressing member is arranged above the airbag sample, and is used to tightly seal and press the airbag sample and the top of the sealed box body, so that a sealed space is formed between the airbag sample and the sealed box body;

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

[0011] A pressurizing device, the 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, a tension is applied to the airbag sample through a stretching device to simulate the tension received by the airbag in the actual working environment; the airbag sample is tightly pressed against the top of the sealed box body through the pressing device to create a sealed space; the temperature of the sealed space is adjusted through the temperature control device to simulate the temperature of the airbag in the actual working environment; the sealed space is pressurized through the pressurizing device to simulate the pressure received by the airbag in the actual working environment. After standing for a period of time, the gas leakage amount of the airbag sample can be obtained according to the temperature change, air pressure change and volume of the sealed cavity in 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 in this embodiment, there is no need for a large warehouse and a large floor area, the site requirements are low, and the test cost is reduced; by testing the airbag sample, the overall sealing performance of the airbag can be understood, the test is more targeted, there is no need to exclude the air leakage position, and time is saved; there is no need to inflate the entire airbag, a large number of sensors are not required, and it is easy to adjust the temperature, tension and pressure received by the airbag sample, saving manpower and material resources.

[0013] In addition, according to the airship airbag sealing performance test equipment of the present invention, the following additional technical features may also be included:

[0014] In some embodiments of the present invention, the stretching device includes a stretching component and a fixing component arranged oppositely, the fixing component is used to fix one side of the airbag sample and the sealed box body, and the stretching component is used to pull the opposite side of the airbag sample.

[0015] In some embodiments of the present invention, a gasket frame is arranged on the top of the sealed box body, the fixing component includes a sample fixing part, the airbag sample covers the gasket frame, the sample fixing part is used to connect the side edge of the airbag sample and the gasket frame, and the pressing member is used to press the airbag sample on the gasket frame.

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

[0017] In some embodiments of the present utility model, the sample connecting member includes a clamping portion. The stretching assembly further includes a clamping plate, and the side of the airbag sample can be clamped between the clamping portion and the clamping plate.

[0018] In some embodiments of the present utility model, the stretching device further includes a guiding assembly. The guiding assembly includes a guide rod. The sample connecting member has a guiding hole. One end of the guide rod is connected to the sealed box body, and the other end of the guide rod passes through the guiding hole. The tension driving member can drive the sample connecting member to reciprocate along the guide rod.

[0019] In some embodiments of the present utility model, the pressing device further includes a pressing driving member. The pressing driving member is located above the pressing member and is used to apply pressure to the pressing member.

[0020] In some embodiments of the present utility model, the temperature control device includes a box body, a heating assembly, and a refrigeration assembly. The box body is arranged on the pressing member. The heating assembly is arranged inside the box body, and the refrigeration assembly is arranged outside the box body and is communicated with the box body.

[0021] In some embodiments of the present utility model, the refrigeration assembly includes a liquid nitrogen tank and a liquid nitrogen pump. The liquid nitrogen tank is communicated with the liquid nitrogen pump. The liquid nitrogen pump is communicated with the box body. Liquid nitrogen is stored in the liquid nitrogen tank, and the liquid nitrogen pump is used to pump the liquid nitrogen in the liquid nitrogen tank to the box body.

[0022] In some embodiments of the present utility model, the sealed box body is connected with 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. Description of the Drawings

[0023] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered as a limitation of the present utility model. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0024] Figure 1Schematically shows a structural schematic diagram of an airbag sample according to an embodiment of the present invention;

[0025] Figure 2 Schematically shows a structural schematic diagram of an airship airbag sealing performance testing device according to an embodiment of the present invention;

[0026] Figure 3 Schematically shows a partial structural schematic diagram of an airship airbag sealing performance testing device according to an embodiment of the present invention;

[0027] Figure 4 Schematically shows an assembly structural schematic diagram of a gasket frame and a stretching device according to an embodiment of the present invention;

[0028] Figure 5 Schematically shows an exploded view of a stretching assembly according to an embodiment of the present invention;

[0029] Figure 6 Schematically shows a structural schematic diagram of a sample connecting piece according to an embodiment of the present invention;

[0030] Figure 7 Schematically shows a flowchart of an airship airbag sealing performance testing method according to an embodiment of the present invention.

[0031] The reference numerals in the drawings are represented as follows:

[0032] 10. Airbag sample; 11. Interface;

[0033] 100. Frame; 110. Operation panel; 120. Hydraulic station;

[0034] 200. Sealing box; 210. Gasket frame; 210a. Positioning ring groove; 220. Extension part; 230. First interface; 240. Second interface;

[0035] 300. Stretching device;

[0036] 310. Stretching assembly; 311. Sample connecting piece; 3111. Clamping part; 3112. Guiding part; 3113. Driving part connecting part; 311a. Guiding hole; 311b. Avoidance hole; 312. Tension driving piece; 313. Splint; 314. Splint connecting piece;

[0037] 320. Fixing assembly; 321. Sample fixing piece; 322. Gasket frame connecting piece;

[0038] 330. Guiding assembly; 331. Guide rod; 332. Guide sleeve; 333. Guide rod connecting plate;

[0039] 400. Compression device; 410. Compression member; 420. Pressing drive member;

[0040] 500. Temperature control device; 510. Box body; 520. Liquid nitrogen tank. Detailed implementation manners

[0041] 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 drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be completely conveyed to those skilled in the art.

[0042] It should be understood that the terms used herein are for the purpose of describing specific exemplary embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of the stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the particular order described or illustrated, unless the order of performance is explicitly stated. It should also be understood that additional or alternative steps may be used.

[0043] Although the terms first, second, third, etc. may be used herein 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 may be used only to distinguish one element, component, region, layer, or section from another. Unless the context clearly indicates otherwise, terms such as "first" and "second" and other numerical terms used herein do not imply an order or sequence. Thus, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the exemplary embodiments.

[0044] For ease of description, spatial relative relationship terms may be used in the text to describe the relationship of one element or feature shown in the figure with respect to another element or feature. These relative relationship terms are, for example, "inner", "outer", "inner side", "outer side", "below", "beneath", "above", "over", etc. Such spatial relative relationship terms are intended to include different orientations of the device during use or operation other than the orientation depicted in the figure. For example, if the device in the figure is flipped, an element described as "below" or "beneath" other elements or features will then be oriented as "above" or "over" other elements or features. Thus, the exemplary term "below" can include both upper and lower orientations.

[0045] Figure 1 The structural schematic diagram of the airbag sample 10 according to an embodiment of the present invention is schematically shown. Figure 2 The structural schematic diagram of the airship airbag sealing performance testing device according to an embodiment of the present invention is schematically shown. As Figure 1 and Figure 2 shown, the present invention provides an airship airbag sealing performance testing device for testing the sealing performance of the airbag sample 10. A structural member penetrates through the airbag sample 10. The airship airbag sealing performance testing device includes a sealing box body 200, a stretching device 300, a pressing device 400, a temperature control device 500, and a pressurizing device. The top of the sealing box body 200 is open, and the airbag sample 10 is covered on the top of the sealing box body 200; the stretching device 300 is used to apply tension to the airbag sample 10; the pressing device 400 includes a pressing member 410. The pressing member 410 is arranged above the airbag sample 10 and is used to tightly seal and press the airbag sample 10 and the top of the sealing box body 200, so that the airbag sample 10 and the sealing box body 200 form a sealed space; the temperature control device 500 is used to adjust the temperature of the sealed space; the pressurizing device is communicated with the sealed space and is used to adjust the air pressure of the sealed space.

[0046] In actual working conditions, airbag leakage usually occurs at the interface 11 where the airbag is connected to the structural member. Therefore, during the test, the interface 11 can be targeted for testing. As long as there is no air leakage at the interface 11, it can be considered that the overall sealing performance of the airbag is good, and there is no need to conduct a sealing performance test on the entire airbag. Therefore, the structural member penetrates through the airbag sample 10 used in the test. By using 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, a tension is applied to the airbag sample 10 through the stretching device 300 to simulate the tension exerted on the airbag in the actual working environment; the airbag sample 10 is pressed against the top of the sealing box 200 through the pressing device 400 to create a sealed space; the temperature of the sealed space is adjusted through the temperature control device 500 to simulate the temperature of the airbag in the actual working environment; the sealed space is pressurized through the pressurizing device to simulate the pressure exerted on the airbag in the actual working environment. After standing for a period of time, the gas leakage amount of the airbag sample 10 can be obtained based on the temperature change, air pressure change, and volume of the sealed cavity in the sealed cavity, thereby providing an important basis for the sealing performance of the airbag. By using the airship airbag sealing performance test equipment provided in this embodiment, there is no need for a large warehouse and a large floor area, the requirements for the site are low, and the test cost is reduced; by testing the airbag sample 10, the overall sealing performance of the airbag can be understood, the test is more targeted, there is no need to exclude the air leakage position, and time is saved; there is no need to inflate the entire airbag, a large number of sensors are not required, and it is easy to adjust the temperature, tension, and pressure received by the airbag sample 10, saving manpower and material resources.

[0047] In actual use, a layer of skin is generally provided outside the airship airbag. The skin is a protective layer covering the outside of the airbag and is 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 enhance the structural strength and durability of the airship. In this embodiment, the structure and material of the airbag sample 10 are the same as those of the airship airbag in the actual working condition, and a skin is provided on its surface. Optionally, refer to Figure 1 , the airbag sample 10 is generally square to facilitate the application of lateral and longitudinal tensions to it.

[0048] Furthermore, refer to Figure 2 , the airbag sealing performance test equipment provided in this embodiment further includes a frame 100. The frame 100 is a steel frame structure and includes a vertical direction ( Figure 1Four vertical rods are provided in the Z-axis direction. Adjacent vertical rods are fixedly connected by connecting rods at the top and bottom. A support rod is provided at the bottom of the frame 100, and the support rod is used to support the sealed box 200. Optionally, an operation panel 110 is provided on the frame 100, and an operator can operate on the operation panel 110 to control each device. For example, the preset tension applied by the stretching device 300 to the airbag sample 10, the pressing force applied by the pressing member 410 to the airbag sample 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 touch-screen or button-type, and can be set according to specific usage needs.

[0049] Further, the sealed box 200 is generally in a cube structure, including four side plates and a bottom plate connected to the bottom of the side plates. The adjacent side plates and between the side plates and the bottom plate are all hermetically connected to prevent air leakage. Optionally, the sealed box 200 is welded with steel plates, and no leakage will occur at the welded parts. And the sealed box 200 can withstand an air pressure of not less than 100,000 Pa and the pressure of the pressing 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 deform 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 part 220 extending beyond the side plates. Through holes are provided on the extension part 220. Correspondingly, mounting holes corresponding to the positions of the through holes are provided on the connecting parts at the bottom of the frame 100. When installing the sealed box 200 and the frame 100, the sealed box 200 and the frame 100 can be fixedly connected by sequentially passing bolts through the through holes and the mounting holes.

[0050] Further, continue to refer to 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.

[0051] Optionally, the box body 510 has a rectangular structure, and the pressing member 410 supports the box body 510. Since the middle of the pressing member 410 is hollowed out, it is beneficial to improve the heat exchange rate between the box body 510 and the airbag sample 10. Optionally, the heating assembly 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 linear, spiral, wavy, etc. The plurality of resistance wires are arranged in parallel or distributed in a mesh. It can be understood that the heating assembly is used to raise the temperature of the airbag sample 10, and the refrigeration assembly is used to lower the temperature of the airbag sample 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 sample 10.

[0052] 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, and the liquid nitrogen pump is connected to the box body 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 body 510. Optionally, the liquid nitrogen tank 520 is placed on the top of the frame 100 to reduce the occupation of the ground area.

[0053] Further, the pressurizing device can introduce nitrogen or air into the sealed space, and adjust the air pressure in the sealed space by controlling the amount of gas entering.

[0054] Further, the sealed box body 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 body 200. The temperature detection unit is used to detect the temperature of the sealed space. Temperature changes will affect the air pressure change in the sealed space. During the test, it is necessary to eliminate the gas pressure change caused by temperature effects. Therefore, 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 temperature sensor is arranged outside the sealed space to detect the external environment temperature to determine whether the air pressure change is caused by temperature change. Optionally, a second interface 240 for connecting the pressure detection unit is provided on the sealed box body 200. The pressure detection unit is used to detect the air pressure in the sealed space. The pressurizing device is controlled according to the measurement result of the pressure detection unit to ensure that the air pressure in the sealed space is equal to the preset pressure. Preferably, the pressure detection unit can be a differential pressure sensor. To eliminate the influence of atmospheric pressure change on the test result, the atmospheric pressure is recorded by a pressure sensor outside the sealed box body 200, and then the actual absolute pressure in the sealed space is calculated through the pressure difference and the atmospheric pressure, and the change value of the absolute pressure is used for the calculation of the gas mass change.

[0055] Further, Figure 3Schematically shown is a partial structural schematic diagram of an airship airbag sealing performance testing device according to an embodiment of the present utility model. Refer to Figure 2 and Figure 3 , the pressing device 400 further includes a pressing driving member 420. The pressing driving member 420 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 sample 10 against the top of the sealing box body 200.

[0056] Optionally, the pressing member 410 can be in a square frame structure to press the outer side of the airbag sample 10 and the top edge of the sealing box body 200. Additionally, by setting the pressing member 410 as a square frame, the temperature control box can be arranged 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 transmitted to the airbag sample 10 and the inside of the sealing space. Preferably, the pressing member 410 has sufficient flatness and a certain roughness on the bottom surface to prevent the pressing member 410 from slipping.

[0057] It can be understood that the setting of the pressing driving member 420 can press the pressing member 410 downward, thereby increasing the pressing force between the airbag sample 10 and the sealing box body 200 and ensuring good sealing performance between the airbag sample 10 and the sealing box body 200. Exemplarily, the fixed end of the pressing driving member 420 is connected to the top of the frame 100, and the movable end of the pressing driving member 420 can perform reciprocating motion in the vertical direction. Optionally, a pressing claw is connected to the movable end of the pressing driving member 420, and there are two contact surfaces between the pressing claw and the pressing member 410. By setting the pressing claw, the contact area between the movable end and the pressing member 410 can be increased, making the force on the pressing member 410 more uniform. In this embodiment, multiple groups of pressing driving members 420 are provided, and the multiple groups of pressing driving members 420 are arranged around the periphery of the pressing member 410. Optionally, two pressing driving members 420 are arranged on each side of the pressing member 410. In other embodiments, the number of pressing driving members 420 can be two, three, four, five, etc., which can be set according to the usage requirements. In this embodiment, the pressing driving 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 pressing driving member 420 can also be a pneumatic cylinder or a motor.

[0058] Furthermore, Figure 4 Schematically shown is an assembly structural schematic diagram of the cushion frame 210 and the stretching device 300 according to an embodiment of the present utility model. Refer to Figure 3 and Figure 4, the stretching device 300 includes a stretching component 310 and a fixing component 320 which are oppositely arranged. The fixing component 320 is used to fix one side of the airbag sample 10 and the sealing box body 200, and the stretching component 310 is used to pull the opposite side of the airbag sample 10.

[0059] Understandably, there are two sets of stretching components 310, and the two sets of stretching components 310 are respectively arranged on two adjacent sides of the airbag sample 10, so as to perform lateral ( Figure 4 in the X-axis direction in Figure 4 and longitudinal (

[0060] Continue to refer to Figure 3 and Figure 4 , a cushion frame 210 is arranged on the top of the sealing box body 200. The fixing component 320 includes a sample fixing part 321. The airbag sample 10 is covered on the cushion frame 210, and the sample fixing part 321 is used to fix the side of the airbag sample 10 and the cushion frame 210, and the pressing part 410 is used to press the airbag sample 10 on the cushion frame 210.

[0061] Optionally, the cushion frame 210 and the sealing box body 200 can be of an integrally formed structural form or a split type. Optionally, a positioning ring groove 210a for placing a sealing ring is arranged on the cushion frame 210. When the pressing part 410 presses the airbag sample 10 on the cushion frame 210, the bottom surface of the airbag sample 10 is in sealing contact with the sealing ring. Therefore, the setting of the sealing ring increases the sealing performance between the airbag sample 10 and the cushion frame 210, and avoids the leakage of gas in the sealed space from the gap between the airbag sample 10 and the cushion frame 210, resulting in deviation of the measurement structure. Understandably, the setting 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, to further increase the sealing performance between the cushion frame 210 and the airbag sample 10, the number of sealing rings can be multiple. Correspondingly, multiple positioning ring grooves 210a are arranged on the cushion frame 210. Exemplarily, the number of sealing rings is two, three or four, etc.

[0062] 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 pad 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 silicone pad or other airtight structures with high temperature and low temperature resistance. Optionally, the sample fixture 321 is connected to the pad frame 210 through a pad frame connector 322. In this embodiment, the pad frame connector 322 includes two parallel 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 pad 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 surface of the sample fixture 321, and connect the horizontal part at the bottom and the pad frame 210, so as to realize the connection between the sample fixture 321 and the pad frame 210. Preferably, a plurality of pad frame connectors 322 are provided, and the plurality of pad 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 pad frame 210, the force on the airbag sample 10 can be balanced.

[0063] 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.

[0064] During the test, first fix one side of the airbag sample 10 on the pad frame 210 through the sample fixture 321, and then start the tension driving member 312 on the opposite side. When a abutting 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.

[0065] Optionally, the sample connector 311 includes a clamping portion 3111, and the stretching assembly 310 further includes a clamping plate 313. The side of the airbag sample 10 can be clamped between the clamping plate 313 and the clamping portion 3111. Optionally, both the clamping plate 313 and the clamping portion 3111 of the sample connector 311 are strip-shaped plate structures. Further, the clamping plate 313 and the clamping portion 3111 are connected by a clamping plate connector 314. Optionally, the clamping plate connector 314 includes a vertical portion and a horizontal portion, and the vertical portion and the horizontal portion are perpendicularly connected to form an L-shaped structure. Through holes are provided on both the vertical portion and the horizontal portion. During assembly, bolts or screws are used to connect the vertical portion to the side of the clamping plate 313, and the bottom of the horizontal portion is connected to the sample connector 311, thereby realizing the connection between the clamping plate 313 and the sample connector 311. Preferably, a plurality of clamping plate connectors 314 are provided, and the plurality of clamping plate connectors 314 are spaced along the length direction of the clamping portion 3111. In this embodiment, the number of clamping plate connectors 314 is four. In other embodiments, the number of clamping plate connectors 314 can be two, three, five, six, etc., and no specific limitation is made here.

[0066] Optionally, the sample connector 311 further includes a driving member connection portion 3113, and the driving member connection portion 3113 is used to connect to the fixed end of the tension driving member 312. The driving member connection portion 3113 is located below the clamping portion 3111. Optionally, the driving member connection portion 3113 is a plate structure, and an avoidance opening is provided thereon to allow the movable end of the tension driving member 312 to pass through. Through holes for connecting to the tension driving member 312 are also provided on the driving member connection portion 3113. Exemplarily, a connection disk is provided at the fixed end of the tension driving member 312, and through holes are provided on the connection disk. When assembling the tension driving member 312 and the sample connector 311, bolts can be used to sequentially pass through the through holes of the connection disk and the through holes on the driving member connection portion 3113, and are locked by nuts.

[0067] Further, the stretching device 300 further includes a guiding assembly 330. The guiding assembly 330 includes a guide rod 331. The sample connector 311 has a guiding hole 311a. One end of the guide rod 331 is connected to the sealed box body 200, and the other end of the guide rod 331 passes through the guiding hole 311a. The tension driving member 312 can drive the sample connector 311 to reciprocate along the guide rod 331.

[0068] Optionally, the sample connecting member 311 further includes a guiding portion 3112, and the guiding hole 311a is provided on the guiding portion 3112. In this embodiment, the number of guiding portions 3112 is two, and the two guiding portions 3112 are respectively located on both sides of the driving member connecting portion 3113. The arrangement of the guiding portion 3112 and the guiding rod can prevent the sample connecting member 311 from tilting during movement, so that the airbag sample 10 is subjected to balanced tension. In this embodiment, both ends of the driving member connecting portion 3113 are respectively connected to the two guiding portions 3112, and the overall structural strength is relatively high. In other embodiments, the driving member connecting portion 3113 can also be connected to the clamping portion 3111.

[0069] Optionally, the guiding assembly 330 further includes a guiding sleeve 332, and the guiding sleeve 332 is inserted through the guiding hole 311a. One end of the guiding sleeve 332 is provided with a convex rib extending radially outward along the guiding sleeve 332, and the convex rib is used for connecting with the guiding portion 3112. The axial length of the guiding sleeve 332 is greater than the axial length of the guiding hole 311a, so as to effectively prevent the guiding rod 331 from tilting.

[0070] Optionally, the wire assembly further includes a guide rod connecting plate 333, and the guide rod connecting plate 333 is connected to the side plate of the sealed box body 200. One end of the guide rod 331 away from the guiding 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 body 200 by bolts or fixed to the sealed box body 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.

[0071] Based on the airship sealing performance testing device in the above embodiments, the airship airbag sealing performance testing method includes the following steps:

[0072] S100. Cover the airbag sample 10 on the top of the sealed box body 200;

[0073] S200. Apply a preset tension to the airbag sample 10 through the stretching device 300;

[0074] S300. Seal and press the airbag sample 10 and the top of the sealed box body 200 through the pressing device 400, so that a sealed space is formed between the airbag sample 10 and the sealed box body 200;

[0075] S400. Adjust the temperature of the sealed space through the temperature control device 500 to make the temperature of the sealed space reach the preset temperature; pressurize the sealed space through the pressurizing device to make the air pressure in the sealed space reach the preset air pressure;

[0076] S500. Obtain the air pressure change and temperature change in the sealed space within a preset time;

[0077] S600. Calculate the change in the gas mass of the sealed space based on the change in the air pressure, the change in the temperature, and the volume of the sealed space using the ideal gas law.

[0078] S700. Determine the sealing performance of the airbag sample 10 based on the change in the gas mass of the sealed space.

[0079] By adopting the airship airbag sealing performance testing method provided in this embodiment, the inflation test of the entire airbag is transformed into the test of the airbag sample 10. There is no need to use a large warehouse that occupies a large area and has inflation conditions. The testing process is more convenient, the testing environment is easy to control, and it can effectively save manpower and material resources.

[0080] Further, S100 further includes placing the pressing member 410 on the airbag sample 10 so that the side of the airbag sample 10 is pressed against the cushion frame 210.

[0081] Further, S200 includes fixing two adjacent side plates of the airbag sample 10 to the cushion frame 210 through the sample fixing member 321, clamping the other two sides between the sample connecting member 311 and the clamping plate 313, and fixing them through the clamping plate connecting member 314. Then, drive the tension driving member 312 so that its movable end extends out and abuts against the guide rod connecting plate 333, thereby stretching the airbag sample 10 until the tension received by the airbag sample 10 reaches the preset tension. The preset tension is set according to the tension received by the airbag in the actual working environment.

[0082] Further, S300 includes driving the pressurizing driving member 420 so that its movable end presses down the pressing member 410 until the airbag sample 10 is in sealed contact with the cushion frame 210.

[0083] Further, S400 includes starting the heating component or the refrigeration component to adjust the temperature of the sealed space, controlling the heating component or the refrigeration component according to the result measured by the temperature detection unit so that the temperature of the sealed space reaches the preset temperature. The preset temperature is set according to the temperature of the airbag in the actual working environment. Starting the pressurizing device to pressurize the sealed space, controlling the pressurizing device according to the result measured by the pressure detection unit so that the air pressure in the sealed space reaches the preset air pressure. The preset air pressure is set according to the air pressure borne by the airbag in the actual working environment.

[0084] Further, after the completion of S100 to S400, it is left standing for a preset time, which is set according to actual needs. After the standing is completed, the air pressure change and the temperature change of the sealed space are obtained. Preferably, to eliminate the influence of atmospheric pressure change on the test results, the pressure difference between the sealed space and the atmosphere is recorded by a differential pressure sensor, 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 through the pressure difference and the atmospheric pressure, and the change in gas mass is calculated using the change in absolute pressure.

[0085] Further, in S600, the ideal gas state equation is: pV = nRT. Where: p is the pressure, V is the gas volume, T is the temperature, n is the amount of substance of the gas, and R is the molar gas constant. The leakage degree of the airbag sample 10 is measured by the obtained change in gas mass.

[0086] In one embodiment, S700 includes that when the change in gas mass exceeds a certain threshold, it is considered that the airbag sample 10 leaks. 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 change in gas mass between the two is less than 5%, it is considered that the interface 11 does not leak. 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 respectively.

[0087] 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 those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should 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 comprises: 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 sample connecting piece (311) includes a clamping portion (3111), and the stretching assembly (310) further includes a clamping plate (313), and the side edge of the airbag sample (10) can be clamped between the clamping portion (3111) and the clamping plate (313).

6. 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).

7. 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).

8. 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).

9. The airship airbag sealing performance testing device according to claim 8, 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).

10. The airship airbag sealing performance testing device according to any one of claims 1 to 9, 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.

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