Rivet nut sealing test tool

Abstract

The rivet nut sealing performance test tool comprises a front air source processing assembly; a gas distribution assembly; the sealing performance test bench assembly comprises a base and an upper seat, and a plurality of test stations are formed after the base and the upper seat are assembled; in each test station, a base air cavity is formed in the base, an upper base air cavity is formed in the upper base, a plate body is placed between the base air cavity and the upper base air cavity, and a sealing structure is arranged between the base air cavity and the upper base air cavity; the plate body is used for assembling a rivet nut to be detected, and the rivet nut is connected to the elastic pre-tightening assembly, so that the rivet nut obtains pulling force or pushing force. The rivet nut sealing performance test tool provided by the invention is compact in overall structure, a plurality of rivet nuts can be detected at the same time, the detection effect can be independently displayed, and an air source for detection is also pretreated, so that the influence on an internal cavity of the detection tool is avoided; the whole test tool is high in integration level and convenient to operate and use.

Description

Technical Field

[0001] The invention belongs to the technical field of fastener sealing detection, and in particular relates to a rivet nut sealing test tool. Background Art

[0002] In modern industrial production, rivet nuts, as a highly efficient fastening element, are widely used in many fields such as automobiles, aviation, and instruments. At the same time, with the diversification and complexity of the application environment, higher requirements are placed on the sealing performance of rivet nuts. In order to ensure that the rivet nuts can achieve the expected sealing effect at the assembly position during use, it is necessary to carry out rivet nut sealing tests.

[0003] At present, the industry still lacks unified rivet nut air tightness test fixtures. Some fixtures can only test a single nut separately, which is inefficient. At the same time, some detection devices lack purification and dehumidification treatment for the detection gas. After long-term use, water vapor is easily accumulated in the fixture chamber, affecting the test results.

[0004] Therefore, based on the above current situations, the present application further designs and improves the rivet nut sealing test tooling. Summary of the invention

[0005] In view of the above problems, the present invention provides a rivet nut sealing test tool with a compact overall structure. It can test multiple rivet nuts at the same time and display the test results separately. The air source used for testing is also pre-processed to avoid affecting the internal chamber of the testing tool. The overall test tool has a high degree of integration and is easy to operate and use.

[0006] The technical solution in the present invention is as follows.

[0007] The rivet nut sealing test tool comprises: a front air source processing component, the air source processing component is provided with an air source air inlet and an air source air outlet, and a gas processing unit is provided between the air source air inlet and the air source air outlet; a gas distribution component, the gas distribution component is provided with a distribution air inlet and a plurality of distribution air outlets, and the distribution air inlet and the plurality of distribution air outlets are connected through the air duct inside the gas distribution component; the air source air outlet and the distribution air inlet are connected through an air pipe; a sealing test bench component, the sealing test bench component comprises a base and an upper seat, and the base and the upper seat are assembled to form a plurality of test stations; in each of the test stations: the base A base air cavity is provided in the seat, and an upper seat air cavity is provided in the upper seat; a plate body is placed between the base air cavity and the upper seat air cavity, and a sealing structure is provided; the plate body is used to assemble the rivet nut to be tested, and the rivet nut is connected to the elastic pre-tightening component so that the rivet nut obtains tension or thrust; the base air cavity is connected to the base air inlet duct, the base exhaust duct, and the base detection air duct; a base air inlet unit is provided on the base air inlet duct, and the base air inlet unit is connected to the corresponding distribution exhaust port through an air pipe, and a base exhaust unit is provided on the base exhaust duct; a pressure detection unit is provided on the base detection air duct, and the pressure detection unit is connected to the pressure display device.

[0008] The rivet nut sealing test tool in the present application first uses an air source processing component to process the gas, such as removing large particles of impurities and water vapor in the gas, so as to avoid the influence and damage of impurities, water vapor, etc. on the internal air cavity of the tool during long-term testing and use, and can also ensure better detection accuracy. Secondly, the test tool in the present application, after the air source air pump supplies air, it is processed by the air source processing component, and then distributed to multiple pipelines for air supply through the gas distribution component, and then cooperates with the sealing test bench component with multiple test stations, so as to perform sealing tests on multiple rivet nuts at the same time. During the test, high-pressure gas enters the base air cavity, and the pressure value in the air cavity can be obtained in real time through the pressure detection unit and the pressure display device, so as to judge whether the sealing performance of the corresponding rivet nut is qualified.

[0009] In addition, the present application simulates the actual use scenario of the rivet nut, that is, the rivet nut is installed on a plate body, which can be a multi-layer plate body, simulating the actual scenario in which the rivet nut fixes the multi-layer structural parts, and an elastic pre-tightening component is also provided to provide force on the rivet nut, simulating the force of the rivet nut in a practical scenario. Therefore, the sealing performance of the rivet nut in the actual use scenario can be well tested as a whole, with high accuracy and easy operation.

[0010] In a preferred embodiment, the elastic pre-tensioning assembly is arranged at the upper part of the upper seat air cavity, and a movable rod body is provided in the elastic pre-tensioning assembly, which can be connected to the rivet nut to be tested after being extended into the upper seat air cavity; a spring assembly is also provided on the pre-tensioning assembly, which is used to provide tension or thrust, and acts on the rivet nut to be tested during testing, so that the rivet nut is subjected to force, simulating an actual usage scenario.

[0011] In a preferred embodiment, the elastic preload assembly is provided with a closing plate that closes the outer opening of the upper seat air cavity, one end of the spring assembly is located on the closing plate, and the other end of the spring assembly is located on the end plate, and the rod body can movably pass through the spring assembly and the closing plate, and the rod body is fixedly connected to the end plate, specifically, it can be fixedly connected by a bolt thread, and the position can be rotated to adjust to achieve adjustment of the elastic force.

[0012] In a preferred embodiment, the base air intake unit is provided with an air intake switch for intake and shutoff, and the base air exhaust unit is provided with an exhaust switch for exhaust and shutoff.

[0013] In a preferred embodiment, the sealing structure is a sealing ring arranged at the assembly position between the base and the upper seat, which can be arranged as needed to ensure the sealing of the internal chamber and avoid air leakage affecting the detection results.

[0014] In a preferred embodiment, the upper and lower surfaces of the plate body are sealed with the upper seat and the base respectively through sealing rings to prevent air leakage, thereby ensuring the accuracy of the detection result.

[0015] In a preferred embodiment, the gas processing unit is a gas dehumidification unit to reduce water vapor and prevent condensation of water vapor in the internal chamber.

[0016] In a preferred embodiment, the upper seat is provided with an upper seat channel 1 and an upper seat channel 2, the inner sides of the upper seat channel 1 and the upper seat channel 2 are both connected to the side surface of the plate body, the outer side of the upper seat channel 1 is provided with an upper seat exhaust unit, and the upper seat channel 2 is provided with a second pressure detection unit, which is connected to the pressure display device. In this structure, when gas leaks into the upper seat channel 1 or the upper seat channel 2 through the multi-layer plate body, it can be detected.

[0017] In a preferred embodiment, the upper seat exhaust unit is provided with an upper seat exhaust switch for exhausting and closing.

[0018] In a preferred embodiment, the upper seat is provided with a leakage confirmation channel connecting the upper seat air cavity with the outside world. In this structure, after the gas leaks into the upper seat air cavity through the gap between the plate body and the rivet nut, it can be confirmed through the leakage confirmation channel. An air pressure detection unit can also be set on the leakage confirmation channel.

[0019] The present invention has the following beneficial effects: it provides a rivet nut sealing test tool with a compact overall structure, which can test multiple rivet nuts at the same time and display the test results separately; the gas source used for testing is also pre-processed to avoid affecting the internal chamber of the testing tool; the overall test tool has a high degree of integration and is easy to operate and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the rivet nut sealing test tool in the first embodiment of the present application (the sealing test bench assembly is a cross-sectional view).

[0021] Figure 2 It is a cross-sectional view of the sealing test bench assembly in the first embodiment of the present application.

[0022] Figure 3 for Figure 2 Magnified view of area A.

[0023] Figure 4 This is a schematic diagram of the rivet nut sealing test tool in the second embodiment of the present application (the sealing test bench assembly is a cross-sectional view).

[0024] Figure 5 It is a cross-sectional view of the sealing test bench assembly in the second embodiment of the present application.

[0025] Figure 6 for Figure 5 Magnified view of area B.

[0026] Figure 7 It is a front view of the sealing test bench assembly in the second embodiment of the present application. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] In the following embodiments, the same or similar reference numerals throughout represent the same or similar components or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0029] In the description of the present invention, it should be understood that the terms: center, longitudinal, transverse, length, width, thickness, up, down, front, back, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and therefore cannot be understood as limiting the present invention. In addition, the terms: first, second, etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features shown. In the description of the present invention, unless otherwise clearly specified and limited, the terms: install, connect, connect, etc. should be understood in a broad sense, and ordinary technicians in this field can understand the specific meaning of the above terms in this practicality according to the specific circumstances.

[0030] Reference Figures 1 to 7 The present invention relates to a rivet nut sealing test tool, comprising: a front air source processing component 1, on which an air source air inlet 11 and an air source air outlet 12 are provided, and a gas processing unit 13 is provided between the air source air inlet 11 and the air source air outlet 12. In a preferred embodiment, the gas processing unit 13 is a gas dehumidification unit to reduce water vapor and prevent water vapor from condensing in the internal chamber.

[0031] It also includes a gas distribution component 3, which is provided with a distribution air inlet 31 and a plurality of distribution air outlets 32. The distribution air inlet 31 and the plurality of distribution air outlets 32 are connected via an air passage inside the gas distribution component 3; the gas source air outlet 12 is connected to the distribution air inlet 31 via an air pipe 2.

[0032] It also includes a sealing test bench assembly 4, which includes a base 41 and an upper seat 42. The base 41 and the upper seat 42 are assembled to form a plurality of test stations; in each of the test stations: a base air cavity 43 is provided in the base 41, and an upper seat air cavity 44 is provided in the upper seat 42; a plate 8 is placed between the base air cavity 43 and the upper seat air cavity 44, and a sealing structure is provided; the plate 8 is used to assemble a rivet nut 6 to be tested, and the rivet nut 6 is connected to the elastic preload assembly 5 so that the plate 8 is The rivet nut 6 obtains a pulling force or a pushing force; the base air cavity 43 is connected to the base air inlet duct 412, the base exhaust duct 411, and the base detection air duct 413; the base air inlet duct 412 is provided with a base air inlet unit 4121, and the base air inlet unit 4121 is connected to the corresponding distribution exhaust port 32 through the air pipe 2, and the base exhaust duct 411 is provided with a base exhaust unit 4111; the base detection air duct 413 is provided with a pressure detection unit 4131, and the pressure detection unit 4131 is connected to a pressure display device.

[0033] Specifically, it can be seen from the accompanying drawings that the elastic pre-tensioning component 5 is arranged at the upper part of the upper seat air cavity 44, and a movable rod body 51 (which can be a stud) is provided in the elastic pre-tensioning component 5. After the rod body 51 is extended into the upper seat air cavity 44, it can be connected to the rivet nut 6 to be tested; the pre-tensioning component 5 is also provided with a spring component 52, which is used to provide tension or thrust, and acts on the rivet nut 6 to be tested during testing, so that the rivet nut 6 is subjected to force, simulating the actual usage scenario.

[0034] Furthermore, the elastic preload assembly 5 is provided with a closing plate 53 which is closed on the outer opening of the upper seat air cavity 44, one end of the spring assembly 52 is located on the closing plate 53, and the other end of the spring assembly 52 is located on the end plate 58, and the rod body 51 can movably pass through the spring assembly 52 and the closing plate 53, and the rod body 51 is fixedly connected to the end plate 58, specifically, it can be fixedly connected by bolt threads, and the position can be rotated to adjust, so as to realize the adjustment of the elastic force.

[0035] As can be seen from the accompanying drawings, in this application, the base air intake unit 4121 is provided with an air intake switch 4122 for air intake and closing, and the base exhaust unit 4111 is provided with an exhaust switch 4112 for exhaust and closing. The sealing structure is a sealing ring 7 arranged at the assembly position between the base 41 and the upper seat 42, which can be set as needed to ensure the sealing of the internal chamber and avoid air leakage affecting the test results. It is necessary that the upper and lower surfaces of the plate body 8 are respectively sealed with the upper seat 42 and the base 41 through the sealing ring 7, so that there will be no air leakage and the accuracy of the test results is ensured.

[0036] Attached Figure 1 To Attachment Figure 3 The schematic diagram of the rivet nut sealing test tool in the first embodiment of the present application is shown, the upper seat 42 is provided with an upper seat channel 1 421 and an upper seat channel 2 422, the inner sides of the upper seat channel 1 421 and the upper seat channel 2 422 are both connected to the side surface of the plate body 8, the outer side of the upper seat channel 1 421 is provided with an upper seat exhaust unit 4211, and the upper seat channel 2 422 is provided with a second pressure detection unit 4221, and the second pressure detection unit 4221 is connected to the pressure display device. In this structure, when the gas leaks into the upper seat channel 1 421 or the upper seat channel 2 422 through the multi-layer plate body 8, it can be detected. The upper seat exhaust unit 4211 is provided with an upper seat exhaust switch 4212 for exhausting and closing.

[0037] Attached Figure 4 To Attachment Figure 7The figure shows a schematic diagram of the rivet nut sealing test tool in the second embodiment of the present application. The upper seat 42 is provided with a leakage confirmation channel 425 connecting the upper seat air cavity 44 with the outside. In this structure, after the gas leaks into the upper seat air cavity 44 through the gap between the plate body 8 and the rivet nut 6, it can be confirmed through the leakage confirmation channel 425. An air pressure detection unit can also be set on the leakage confirmation channel 425.

[0038] It can be seen from the above description that when the rivet nut sealing test tool in the present application is used, the base 41 and the upper seat 42 are first opened, the rivet nut to be tested is installed, and then the base 41 and the upper seat 42 are assembled together, and then the elastic preload component 5 is assembled.

[0039] In the rivet nut sealing test tool in the present application, the rivet nut used for testing can be a high-strength and tough weather-resistant bolt.

[0040] The test fixture in the present application first uses the gas source processing component 1 to process the gas, such as removing large particles of impurities and water vapor in the gas, so as to avoid the influence and damage of impurities, water vapor, etc. on the internal air cavity of the tooling during long-term testing and use, and can also ensure better detection accuracy. Secondly, the test fixture in the present application, after the gas source air pump supplies gas and is processed by the gas source processing component 1, it is distributed into multiple pipelines for gas supply through the gas distribution component 3, and then cooperates with the sealing test bench component 4 with multiple test stations, so as to perform sealing tests on multiple rivet nuts at the same time. During the test, high-pressure gas enters the base air cavity 43, and the pressure value in the air cavity can be obtained in real time through the pressure detection unit 4131 and the pressure display device, so as to judge whether the sealing performance of the corresponding rivet nut is qualified.

[0041] In addition, the present application simulates the actual use scenario of the rivet nut, that is, the rivet nut is installed on the plate body 8, and the plate body 8 can be a multi-layer plate body, simulating the actual scenario in which the rivet nut fixes the multi-layer structural parts, and an elastic pre-tightening component 5 is also provided to provide force on the rivet nut, simulating the force of the rivet nut in the practical scenario. Therefore, the sealing performance of the rivet nut in the actual use scenario can be well tested as a whole, with high accuracy and easy operation.

[0042] In a specific solution, the pressure detection unit may be a PSE530 series pressure sensor.

[0043] It can be seen from the above description that the present invention provides a rivet nut sealing test tool with a compact overall structure. It can test multiple rivet nuts at the same time and display the test results separately. The gas source used for testing is also pre-processed to avoid affecting the internal chamber of the testing tool. The overall test tool has a high degree of integration and is easy to operate and use.

[0044] The protection scope of the present invention includes but is not limited to the above embodiments. The protection scope of the present invention shall be based on the claims. Any replacement, deformation, and improvement of the technology that can be easily thought of by technicians in this field shall fall within the protection scope of the present invention.

Claims

1. The sealing test tool for rivet nuts is characterized by: include: A front-mounted gas source processing component (1), wherein the gas source processing component (1) is provided with a gas source inlet (11) and a gas source outlet (12), and a gas processing unit (13) is provided between the gas source inlet (11) and the gas source outlet (12); A gas distribution component (3), wherein the gas distribution component (3) is provided with a distribution gas inlet (31) and a plurality of distribution gas outlets (32), and the distribution gas inlet (31) and the plurality of distribution gas outlets (32) are connected via an air passage inside the gas distribution component (3); The gas source outlet (12) and the distribution gas inlet (31) are connected via an air pipe (2); A sealing test bench assembly (4), the sealing test bench assembly (4) comprising a base (41) and an upper seat (42), wherein the base (41) and the upper seat (42) are assembled to form a plurality of test stations; In each of the test stations: a base air cavity (43) is provided in the base (41), an upper seat air cavity (44) is provided in the upper seat (42), a plate body (8) is placed between the base air cavity (43) and the upper seat air cavity (44), and a sealing structure is provided; The plate body (8) is used to assemble the rivet nut (6) to be tested, and the rivet nut (6) is connected to the elastic pre-tightening component (5) so that the rivet nut (6) obtains a tensile force or a thrust force; The base air cavity (43) is connected to the base air inlet channel (412), the base exhaust channel (411), and the base detection air channel (413); a base air inlet unit (4121) is provided on the base air inlet channel (412); the base air inlet unit (4121) is connected to the corresponding distribution exhaust port (32) via an air pipe (2); and a base exhaust unit (4111) is provided on the base exhaust channel (411); The base detection air channel (413) is provided with a pressure detection unit (4131), and the pressure detection unit (4131) is connected to a pressure display device.

2. The rivet nut sealing test tool according to claim 1 is characterized in that: The elastic pre-tightening component (5) is arranged at the upper part of the upper seat air cavity (44), and a movable rod body (51) is provided in the elastic pre-tightening component (5). After the rod body (51) extends into the upper seat air cavity (44), it can be connected to the rivet nut (6) to be tested. The pre-tightening component (5) is also provided with a spring component (52), which is used to provide a pulling force or a pushing force and acts on the rivet nut (6) to be tested during testing.

3. The rivet nut sealing test tool according to claim 2 is characterized in that: The elastic preload component (5) is provided with a closing plate (53) which closes the outer opening of the upper seat air cavity (44); one end of the spring component (52) is located on the closing plate (53); the other end of the spring component (52) is located on the end plate (58); the rod body (51) can movably pass through the spring component (52) and the closing plate (53); and the rod body (51) is fixedly connected to the end plate (58).

4. The rivet nut sealing test tool according to claim 1, characterized in that: The base air intake unit (4121) is provided with an air intake switch (4122), and the base air exhaust unit (4111) is provided with an air exhaust switch (4112).

5. The rivet nut sealing test tool according to claim 1, characterized in that: The sealing structure is a sealing ring (7) arranged at an assembly position between the base (41) and the upper seat (42).

6. The rivet nut sealing test tool according to claim 1, characterized in that: The upper and lower surfaces of the plate body (8) are sealed with the upper seat (42) and the base (41) respectively through the sealing ring (7).

7. The rivet nut sealing test tool according to claim 1, characterized in that: The gas processing unit (13) is a gas dehumidification unit.

8. The rivet nut sealing test tool according to any one of claims 1 to 7, characterized in that: The upper seat (42) is provided with an upper seat channel 1 (421) and an upper seat channel 2 (422); the inner sides of the upper seat channel 1 (421) and the upper seat channel 2 (422) are both connected to the side surface of the plate body (8); the outer side of the upper seat channel 1 (421) is provided with an upper seat exhaust unit (4211); the upper seat channel 2 (422) is provided with a second pressure detection unit (4221); the second pressure detection unit (4221) is connected to the pressure display device.

9. The rivet nut sealing test tool according to claim 8, characterized in that: The upper seat exhaust unit (4211) is provided with an upper seat exhaust switch (4212).

10. The rivet nut sealing test tool according to any one of claims 1 to 7, characterized in that: The upper seat (42) is provided with a gas leakage confirmation channel (425) connecting the upper seat air cavity (44) with the outside world.

Images