Airtightness test system for open type component

Abstract

The utility model discloses an air tightness test system for an open-type component, relates to the technical field of air tightness test, and mainly aims to effectively detect the air tightness of the open-type component and ensure that the open-type component does not have the problems of air leakage and the like in practical application so as to improve the performance and the safety of equipment. According to the main technical scheme, the air tightness testing system for the open type component comprises a sealing structure, the sealing structure is arranged at the open end of the open type component, a connector is arranged on the sealing structure, the connector is used for being communicated with an air source, and the air tightness testing system is used for testing air tightness of the open type component. A control switch, a pressure sensor and a flow sensor are arranged on a communicating pipeline of the air source and the connector.

Description

Technical Field

[0001] The utility model belongs to the technical field of air tightness testing, and in particular relates to an air tightness testing system for open components. Background Art

[0002] With the continuous development of industrial technology, the quality requirements for various components are becoming increasingly higher, especially in application scenarios involving sealing.

[0003] The airtightness of open components plays a critical role in many fields. However, there is currently no testing system specifically designed for these components. This makes it difficult to ensure that these components meet stringent quality requirements in practical applications. Once a problem occurs, gas leaks are highly likely to occur during subsequent use, negatively impacting the performance and safety of the equipment. Utility Model Content

[0004] In view of this, an embodiment of the present invention provides an air tightness testing system for open components, the main purpose of which is to effectively detect the air tightness of open components to ensure that there will be no gas leakage problems in actual applications, thereby improving the performance and safety of the equipment.

[0005] In order to achieve the above-mentioned purpose, the present invention mainly provides the following technical solutions:

[0006] An embodiment of the present utility model provides an airtightness testing system for an open component, comprising:

[0007] Sealed structure;

[0008] The sealing structure is arranged at the open end of the open component, and an interface is provided on the sealing structure, the interface is used to connect with the gas source, and a control switch, a pressure sensor and a flow sensor are provided on the connecting pipeline between the gas source and the interface.

[0009] Optionally, the air tightness testing system for open components further includes:

[0010] Pressure regulating valve;

[0011] The pressure regulating valve is arranged on the upstream side of the pressure sensor along the flow direction.

[0012] Optionally, the sealing structure includes a front end seal and a rear end seal, the open member has at least two open ends, and the front end seal and the rear end seal are arranged opposite to each other at the at least two open ends of the open member.

[0013] Optionally, the air tightness testing system for open components further includes:

[0014] Mating flanges and clamps;

[0015] The docking flange is arranged between the front end seal and the open member and is fixed relative to the front end seal;

[0016] The clamp is provided at the connection between the butt joint flange and the end portion of the open component, and is used to fix the butt joint flange and the end portion of the open component.

[0017] Optionally, the flatness of the end surface of the docking flange relative to the open component is smaller than the flatness of the end surface of the open component relative to the docking flange.

[0018] Optionally, a first groove is formed on a surface of the open component that contacts the docking flange, and a metal sealing ring is provided in the first groove.

[0019] Optionally, a second groove is provided on the surface of the rear end seal in contact with the open component, and a rubber sealing ring is provided in the second groove.

[0020] Optionally, the air tightness testing system for open components further includes:

[0021] A support base, any one of the front end seal and the rear end seal is fixedly arranged on the support base, and the other of the front end seal and the rear end seal is movably arranged on the support base.

[0022] Optionally, the air tightness testing system for open components further includes:

[0023] test platform;

[0024] The support base is fixedly arranged on the test platform, the temperature of the test platform is adjustable, and the test platform is vibratory.

[0025] Optionally, the air tightness testing system for open components further includes:

[0026] An adjusting column, one end of which is relatively fixed to any one of the front end seal and the rear end seal, and the other end of which is movably connected to the other one of the front end seal and the rear end seal.

[0027] By means of the above technical solution, the present invention has at least the following beneficial effects:

[0028] The airtightness testing system for an open component provided in an embodiment of the present invention effectively seals the open component by placing a sealing structure at the open end of the open component, preventing gas leakage and ensuring the stability of the testing environment, thereby improving the accuracy of the test results. By providing a pressure sensor and a flow sensor, the pressure and flow of the gas source entering the open component can be monitored in real time. Precise measurement of these parameters can accurately determine the airtightness of the open component, avoiding misjudgments caused by subjective judgment or inaccurate measurement methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic structural diagram of an air tightness testing system for an open component according to an optional embodiment of the present invention;

[0030] Figure 2 for Figure 1 Cross-sectional view of the front seal, opening member and rear seal of the illustrated embodiment.

[0031] The reference numerals indicate:

[0032] 1. Front seal; 2. Rear seal; 3. Open component; 4. Interface; 5. Air source; 6. Control switch; 7. Pressure sensor; 8. Flow sensor; 9. Pressure regulating valve; 10. Docking flange; 11. Metal sealing ring; 12. Rubber sealing ring; 13. Support base; 14. Adjustment column. DETAILED DESCRIPTION

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0035] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0036] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0037] See also Figure 1 and Figure 2 As shown, according to an embodiment of the present invention, an air tightness testing system for an open component 3 is provided, including a sealing structure, which is arranged at the open end of the open component 3, and an interface 4 is provided on the sealing structure, and the interface 4 is used to connect to the gas source 5. A control switch 6, a pressure sensor 7 and a flow sensor 8 are provided on the connecting pipeline between the gas source 5 and the interface 4.

[0038] By placing a sealing structure at the open end of open member 3, open member 3 can be effectively sealed, preventing gas leakage, ensuring the stability of the test environment, and thus improving the accuracy of test results. By providing pressure sensor 7 and flow sensor 8, the pressure and flow rate of gas source 5 entering open member 3 can be monitored in real time. Precise measurement of these parameters can accurately determine the airtightness of open member 3, avoiding misjudgments caused by subjective judgment or inaccurate measurement methods.

[0039] In some specific examples, the open component 3 has only one open end. For example, the open component can be a container with one end open. In other specific examples, the open component 3 has at least two open ends. For example, the open component 3 can be a mixing device for an aircraft pneumatic system, a ventilation duct, a water supply and drainage pipe, a hydraulic cylinder, a cylinder body, an audio cabinet, etc.

[0040] Specifically, in this embodiment, open component 3 is a mixing device for an aircraft pneumatic system, which has open ends. In this case, the sealing structure includes a front seal 1 and a rear seal 2, which are positioned opposite each other at the two open ends of the mixing device. These seals ensure the integrity of the seal and prevent gas leakage during testing, thereby creating a stable environment for accurately testing the airtightness of the mixing device.

[0041] Wherein, an interface 4 connected to a gas source 5 is provided on any one of the front seal 1 and the rear seal 2, so that gas can enter the interior of the open component 3 from the gas source 5 to perform an airtightness test.

[0042] Among them, a control switch 6 is provided on the connecting pipeline between the gas source 5 and the front end seal 1. The control switch 6 can be a ball valve, a solenoid valve, a stop valve, etc. The control switch 6 is used to control the on and off of the gas, so that the tester can open or close the gas source 5 when needed to perform test operations at different stages.

[0043] A pressure sensor 7, such as a pressure gauge, is also installed on the pipeline connecting the gas source 5 and the front seal 1. The pressure sensor 7 is located after the control switch 6 in the flow direction and monitors the pressure of the gas source 5 entering the open component 3 in real time. By reading the data from the pressure sensor 7, the tester can understand the pressure changes during the test and determine the airtightness of the open component 3. A rapid or unstable pressure drop may indicate a leak in the open component 3.

[0044] The connecting line between the gas source 5 and the front seal 1 is also equipped with a flow sensor 8, which can be a flow meter or the like. Flow sensor 8 is located after the pressure sensor 7 in the flow direction and can measure the flow rate of the gas source 5 entering the open component 3 in real time. Monitoring the flow rate can further assist in determining the airtightness of the open component 3. If there is a gas leak, the flow rate will change, providing another important basis for determining the airtightness.

[0045] It should be noted that the flow direction can be the direction of gas flow in the connecting pipeline between the gas source 5 and the interface 4. In this embodiment, starting from the gas source 5, the gas flows along the connecting pipeline to the open component 3. During this process, the flow direction sequentially passes through the control switch 6, the pressure regulating valve 9, the pressure sensor 7, and the flow sensor 8, and finally enters the interior of the open component 3 through the interface 4 on the sealing structure.

[0046] Specifically, in practical applications, consider the airtightness test of a mixing device for an aircraft pneumatic system. First, the front seal 1 and rear seal 2 are positioned opposite each other along the length of the open component 3, ensuring a relatively closed test environment. Then, the gas source 5 and control switch 6 are turned on, allowing gas to enter the mixing device through the interface 4. Gas continuously fills the mixing device, pressurizing it. A pressure sensor 7 monitors pressure changes in the connecting pipes and within the mixing device in real time, while a flow sensor 8 measures the flow rate of gas. Once the pressure within the mixing device reaches a predetermined value, the control switch 6 is closed, shutting off the connection between the gas source 5 and the mixing device. During this phase, the pressure sensor 7 continuously monitors changes in pressure. If the mixing device is leak-proof and there are no gas leaks, the pressure sensor 7 reading should remain relatively stable. If a leak is present, gas will gradually leak out, causing a pressure drop, which the pressure sensor 7 will accurately detect. Simultaneously, the flow sensor 8 closely monitors the flow of gas. If a flow rate change is detected, it indicates a gas leak, further confirming a problem with the airtightness of the aircraft pneumatic system's mixing device. It is understood that the monitoring data from pressure sensor 7 and flow sensor 8 after control switch 6 is closed can be used to comprehensively determine whether the aircraft pneumatic system's mixing device meets airtightness requirements. If not, the aircraft pneumatic system's mixing device can be inspected and repaired, then retested until it meets airtightness standards.

[0047] In some possible implementations disclosed in the present invention, see Figure 1 As shown, the air tightness testing system for open components further includes a pressure regulating valve 9 , which is arranged on the upstream side of the pressure sensor 7 along the flow direction.

[0048] By providing a pressure regulating valve 9, the gas pressure entering the open component 3 can be precisely adjusted according to the different types of open components 3 and specific test requirements. For example, for some thin-walled open components 3, such as audio cabinets, a lower test pressure is required to prevent damage; while for high-strength components such as hydraulic cylinder blocks and pneumatic cylinder blocks, the test pressure can be appropriately increased to ensure test accuracy.

[0049] The gas source 5 may be nitrogen, and the pressure regulating valve 9 may be a nitrogen pressure reducer or other equipment.

[0050] In some possible implementations disclosed in the present invention, see Figure 2As shown, when the open component 3 has two open ends and the sealing structure includes a front seal 1 and a rear seal 2, the airtightness testing system for the open component also includes a docking flange 10 and a clamp. The docking flange 10 is arranged between the front seal 1 and the open component 3 and is relatively fixed to the front seal 1. The clamp is arranged at the connection between the docking flange 10 and the end of the open component 3, and the clamp is used to fix the docking flange 10 and the end of the open component 3.

[0051] By providing the docking flange 10, a stable connection interface is provided for the front seal 1 and the open component 3, which can effectively disperse the pressure at the connection point and ensure that the connection between the front seal 1 and the open component 3 is firm and reliable. By providing the clamp, the stability of the connection between the front seal 1 and the open component 3 can be further enhanced, preventing the connection point from loosening due to gas pressure or other external factors during the test process, thereby ensuring the reliability of the seal. In addition, it is understandable that the combined use of the docking flange 10 and the clamp makes the connection between the open component 3 and the airtightness test system more convenient and quick. During installation, it is only necessary to align the docking flange 10 with the port of the open component 3 and then secure it with the clamp; similarly, when the test is completed, disassembly is also very convenient. Simply loosen the clamp to separate the open component 3 from the test system. Compared with traditional connection methods, this method greatly saves installation time and improves test efficiency.

[0052] Among them, the docking flange 10 can be a flat flange, etc. The docking flange 10 is located on one side of the front seal 1, one end of which is tightly connected to the front seal 1, and the other end is adapted to the end of the open component 3 to establish a connection channel between the open component 3 and the front seal 1, ensuring that during the air tightness test, the gas can smoothly enter the open component 3 from the front seal 1 through the docking flange 10.

[0053] Specifically, the tight connection of the docking flange 10 to the front seal 1 can be achieved by welding, bolt connection, etc., to ensure that the sealing effect of the front seal 1 can be effectively transferred to the docking flange 10 and then act on the open component 3.

[0054] The clamp is provided at the connection between the butt flange 10 and the end portion of the open component 3 .

[0055] Specifically, the clamp surrounds the periphery of the end portions of the docking flange 10 and the open component 3 , and by applying pressure, the docking flange 10 and the open component 3 are tightly fixed together.

[0056] In the above embodiment, the flatness of the end surface of the counter flange 10 on the side facing the open member 3 is smaller than the flatness of the end surface of the open member 3 on the side facing the counter flange 10 .

[0057] As a result, when the mating flange 10 contacts the end face of the open component 3, it achieves a tighter fit, reducing the gap between the two contacting ends and thus reducing the possibility of gas leakage. Furthermore, when a clamp is used for fastening, the high flatness of the mating flange 10 ensures that the sealing pressure is evenly distributed across the entire contact surface. This prevents localized pressure increases or decreases, further improving sealing reliability.

[0058] In this embodiment, the open component 3 is a mixing device for an aircraft pneumatic system. The flatness of the end face of the mixing device for an aircraft pneumatic system relative to the docking flange 10 is 0.3 mm, and the flatness of the end face of the docking flange 10 relative to the mixing device for an aircraft pneumatic system is 0.2 mm.

[0059] In the above embodiment, see Figure 2 As shown, a first groove is formed on the surface of the open component 3 that contacts the docking flange 10 , and a metal sealing ring 11 is provided in the first groove.

[0060] The first groove provides a fixed installation position for the metal sealing ring 11, preventing it from shifting during testing. By placing the metal sealing ring 11 in the first groove, when the mating flange 10 contacts the open component 3, the metal sealing ring 11 is squeezed between the two, forming an effective seal.

[0061] The metal sealing ring 11 may be made of 718 nickel alloy, so that the air tightness test of the open component 3 can be performed in a high temperature environment below 220°C.

[0062] In some possible implementations disclosed in the present invention, see Figure 2 As shown, when the open component 3 has two open ends and the sealing structure includes a front seal 1 and a rear seal 2, a second groove is provided on the surface of the rear seal 2 that contacts the open component 3, and a rubber sealing ring 12 is provided in the second groove.

[0063] It should be noted that, similar to the front-end seal 1, the rear-end seal 2 also has the important task of preventing gas leakage. A rubber sealing ring 12 is provided on the surface of the rear-end seal 2, which, together with the metal sealing ring 11 at the front end, provides double sealing protection for the open component 3. The rubber sealing ring 12 has good elasticity and compressibility, and can fit tightly to the surface of the open component 3, effectively preventing gas from leaking from the rear end. In addition, during installation and use, the open component 3 may be subjected to certain mechanical shocks. The rubber sealing ring 12 can act as a buffer, absorb part of the impact energy, and reduce damage to the rear-end seal 2 and the open component 3. Especially in some environments with large vibrations, the rubber sealing ring 12 can effectively reduce the impact of vibration on the sealing structure.

[0064] The rubber sealing ring 12 may be made of high-temperature resistant fluorinated rubber, so that the air tightness test of the open component 3 can be performed in a high-temperature environment below 220°C.

[0065] In some possible implementations disclosed in the present invention, see Figure 1 and Figure 2 As shown, when the open component 3 has two open ends and the sealing structure includes a front seal 1 and a rear seal 2, the airtightness testing system for the open component also includes a support base 13, any one of the front seal 1 and the rear seal 2 is fixedly set on the support base 13, and the other of the front seal 1 and the rear seal 2 is movably set on the support base 13.

[0066] When either the front seal 1 or the rear seal 2 is fixedly mounted on the support base 13, it provides a stable positioning reference point for the open component 3. When installing the open component 3, simply aligning one end of the open component 3 with the fixed seal allows for quick positioning of the component, improving installation efficiency.

[0067] Specifically, any one of the front seal 1 and the rear seal 2 can be fixed on the support base 13 by welding, bolt connection, etc., to ensure that the connection between the sealing component and the support base 13 is firm and reliable.

[0068] When the other of the front seal 1 and the rear seal 2 is movably disposed on the support base 13, it is more convenient to disassemble the open member 3. After the test is completed, the movable seal can be easily removed and the open member 3 can be taken out without complicated disassembly operations.

[0069] Specifically, the other of the front seal 1 and the rear seal 2 can be made movable on the support base 13 by means of mechanical structures such as guide rails and sliders, so that the position can be adjusted as needed.

[0070] It should be noted that in this embodiment, by setting one of the front seal 1 and the rear seal 2 to be fixed and the other to be movable, the test system can adapt to open components 3 of different lengths. The movable sealing component can be adjusted according to the actual length of the open component 3, ensuring that the sealing component can fit tightly at the end of the open component 3 and achieve a good sealing effect.

[0071] In some possible embodiments disclosed in the present invention, the air tightness testing system for open components further includes a testing platform, the support base 13 is fixedly arranged on the testing platform, the temperature of the testing platform is adjustable, and the testing platform is vibratory.

[0072] The test platform's adjustable temperature function allows simulation of the open component 3's operating conditions in different temperature environments. For example, a hybrid device used in an aircraft's pneumatic system may require airtightness testing in both high and low temperature environments to ensure proper operation in various climates. By adjusting the test platform's temperature, these varying temperature conditions can be simulated, allowing for a more comprehensive test of the airtightness of the open component 3.

[0073] The test platform's vibration capability simulates the vibrations that open-type components 3 might experience during actual use. For example, ventilation ducts and drainage pipes can be affected by vibration during installation and use, while audio cabinets, hydraulic cylinders, and pneumatic cylinder bodies can also vibrate during operation. By simulating a vibration environment, the airtightness of open-type components 3 can be tested under these conditions, ensuring that they will not leak during actual use.

[0074] It should be noted that in this embodiment, by simulating different temperature and vibration environments, the test conditions can be made closer to the actual use of the open component 3. This can more accurately detect the airtightness problems of the open component 3 in various complex environments, thereby improving the accuracy and reliability of the test.

[0075] In some possible implementations disclosed in the present invention, see Figure 1 and Figure 2 As shown, when the open component 3 has two open ends and the sealing structure includes a front seal 1 and a rear seal 2, the airtightness testing system for the open component also includes an adjusting column 14, one end of the adjusting column 14 is relatively fixed to any one of the front seal 1 and the rear seal 2, and the other end of the adjusting column 14 is movably connected to the other of the front seal 1 and the rear seal 2.

[0076] Thus, the spacing between the front seal 1 and the rear seal 2 can be varied by adjusting the column 14. This allows precise adjustment of the seal position when dealing with open components 3 of varying lengths, ensuring effective sealing while increasing the versatility of the test system. Furthermore, when performing an airtightness test, appropriate sealing pressure must be applied to both ends of the open component 3. The adjusting column 14 balances the sealing force, ensuring a more even pressure between the front seal 1 and the rear seal 2 on the open component 3.

[0077] One end of the adjustment column 14 is relatively fixed to any one of the front seal 1 and the rear seal 2 , and the fixed connection can be achieved by welding, bolt connection, etc.

[0078] The other end of the adjustment column 14 is movably connected to the other of the front seal 1 and the rear seal 2 , and the movably connected can be achieved by a mechanical structure such as a thread.

[0079] In the above embodiment, at least four adjusting posts 14 are provided, and the at least four adjusting posts 14 are respectively located at the four corners of the front seal 1 and the rear seal 2 .

[0080] By providing adjustment columns 14 at the four corners of the front seal 1 and the rear seal 2, a uniform support force can be provided for the front seal 1 and the rear seal 2. During the sealing and testing of the open component 3, this uniform support ensures that the sealing components are subjected to balanced forces, preventing localized excessive or insufficient forces, thereby improving the stability of the entire system. At the same time, it can effectively prevent the front seal 1 and the rear seal 2 from tilting during use. Whether when installing the open component 3 or conducting an airtightness test, this stable support ensures the accuracy and reliability of the seal and avoids gas leakage caused by tilting of the sealing components.

[0081] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0082] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. The above are only preferred embodiments of the present invention. It should be noted that for those skilled in the art, several improvements and variations can be made without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. An airtightness testing system for an open component (3), characterized in that: include: Sealed structure; The sealing structure is arranged at the open end of the open component (3), and an interface (4) is provided on the sealing structure. The interface (4) is used to connect with an air source (5), and a control switch (6), a pressure sensor (7) and a flow sensor (8) are provided on the connecting pipeline between the air source (5) and the interface (4).

2. The airtightness testing system for an open component (3) according to claim 1, characterized in that: Also includes: Pressure regulating valve (9); The pressure regulating valve (9) is arranged on the upstream side of the pressure sensor (7) along the flow direction.

3. The airtightness testing system for an open component (3) according to claim 1, characterized in that: The sealing structure comprises a front seal (1) and a rear seal (2), the open member (3) has at least two open ends, and the front seal (1) and the rear seal (2) are arranged relative to each other at at least the two open ends of the open member (3).

4. The airtightness testing system for an open component (3) according to claim 3, characterized in that: Also includes: a butt flange (10) and a clamp; The docking flange (10) is arranged between the front end seal (1) and the open member (3), and is fixed relative to the front end seal (1); The clamp is provided at the connection between the butt flange (10) and the end of the open component (3), and the clamp is used to fix the butt flange (10) and the end of the open component (3).

5. The airtightness testing system for an open component (3) according to claim 4, characterized in that: The flatness of the end surface of the mating flange (10) relative to the open component (3) is smaller than the flatness of the end surface of the open component (3) relative to the mating flange (10).

6. The airtightness testing system for an open component (3) according to claim 4, characterized in that: A first groove is provided on the surface of the open component (3) that contacts the docking flange (10), and a metal sealing ring (11) is provided in the first groove.

7. The airtightness testing system for an open component (3) according to claim 3, characterized in that: A second groove is provided on the surface of the rear end seal (2) that contacts the open component (3), and a rubber sealing ring (12) is provided in the second groove.

8. The airtightness testing system for an open component (3) according to claim 3, characterized in that: Also includes: A support base (13), wherein any one of the front seal (1) and the rear seal (2) is fixedly arranged on the support base (13), and the other of the front seal (1) and the rear seal (2) is movably arranged on the support base (13).

9. The airtightness testing system for an open component (3) according to claim 8, characterized in that: Also includes: test platform; The support base (13) is fixedly arranged on the test platform, the temperature of the test platform is adjustable, and the test platform is vibratory.

10. The airtightness testing system for an open component (3) according to claim 3, characterized in that: Also includes: An adjusting column (14), one end of which is relatively fixed to any one of the front seal (1) and the rear seal (2), and the other end of which is movably connected to the other of the front seal (1) and the rear seal (2).

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