A kind of automatic exhaust device of pulse blind end test piece

Abstract

The utility model provides a kind of automatic exhaust device of pulse blind end test piece, it relates to hydraulic testing equipment technical field, the test piece of the device is equipped with exhaust hole, exhaust hole is equipped with exhaust assembly, and exhaust assembly is connected with medium oil tank by pipeline;By the switch of solenoid valve, and utilize medium pump to realize the realization of one exhaust function to test piece tooling, when medium pump starts, solenoid valve can be opened, then medium will be into the test piece from liquid inlet hose, then the excess air in test piece will be returned to medium oil tank by test piece exhaust connector, solenoid valve, exhaust hose, again, ensure that test piece exhaust connector and exhaust hose are in the high point of test piece during installation, so as to increase exhaust effect, when the air in test piece is exhausted, the pulse waveform of test piece will be greatly improved, and it will be more in line with the waveform of experimental standard, and the accuracy of test piece pulse test is improved.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic testing equipment technology, and in particular to an automatic venting device for pulse blind end specimens. Background Technology

[0002] In the reliability testing of flexible connectors used in hydraulic systems, particularly in aerospace and automotive fields, pressure pulse fatigue testing is a key method for verifying their lifespan and performance. This test simulates pulse impacts under actual operating conditions by applying periodically varying pressure waveforms (such as T-waves or sine waves) to the test piece. The accuracy of the test waveform, especially parameters such as the sharpness of the waveform corners and the rise and fall slopes, directly determines the validity and reliability of the test results.

[0003] Currently, when conducting pulse tests on specimens with blind-end structures, residual air inside the specimen and tooling is the main factor affecting waveform quality. Because air is compressible, its presence severely dampens the transmission and formation of pressure waves, leading to waveform distortion. For example, in tests requiring the generation of steep T-shaped waves, residual air can make the waveform corners smooth, preventing the formation of the sharp right angles required by the standard, thus rendering the entire test invalid and failing to accurately assess the fatigue performance of the specimen. Summary of the Invention

[0004] This invention proposes an automatic air venting device for pulse blind-end specimens, which aims to solve the problem of residual air inside the specimens and tooling in existing pulse testing devices.

[0005] This utility model provides an automatic venting device for pulse blind-end test specimens. The medium unit of the device is connected to both the pulse unit and the test specimen through a pipeline. The test specimen has a vent hole, and a venting component is installed on the vent hole. The venting component is also connected to the medium unit through a pipeline. The pulse unit is the test end of the device.

[0006] Furthermore, the media unit consists of a media tank connected to a media pump via pipelines and a manual ball valve. The other end of the media pump is connected to both the pulse unit and the test piece via pipelines, a check valve, and a filter.

[0007] Furthermore, the test piece includes: a liquid inlet fixture, a test piece, and a blind end fixture; one end of the test piece is connected to the liquid inlet fixture, and the other end of the test piece is connected to the blind end fixture; an vent is provided on the liquid inlet fixture.

[0008] Furthermore, the exhaust assembly includes: a first test piece exhaust connector, a second test piece exhaust connector, a solenoid valve, a solenoid valve connector, and an exhaust hose; the first test piece exhaust connector is connected to the exhaust port; the second test piece exhaust connector is connected to the first test piece exhaust connector; the solenoid valve is connected to the second test piece exhaust connector; the solenoid valve connector is installed on the solenoid valve, and the solenoid valve is remotely controlled by an external control signal; one end of the exhaust hose is connected to the solenoid valve connector, and the other end of the exhaust hose is connected to the medium oil tank through a pipeline.

[0009] Furthermore, one end of the specimen inlet fixture is equipped with a liquid supply hose, and the specimen inlet fixture is connected to the liquid supply hose through a liquid supply connector; the liquid supply hose is connected to the medium pump through a pipeline.

[0010] Furthermore, the medium oil tank is equipped with an air filter and a level relay; a visual level gauge is installed inside the medium oil tank; and an oil suction filter is also installed inside the medium oil tank, which is connected to a manual ball valve via a pipeline.

[0011] Compared with the prior art, this utility model has the following advantages: This invention achieves its purpose by controlling the opening and closing of a solenoid valve and utilizing a media pump to vent the test specimen. When the media pump starts, the solenoid valve is opened, and the medium enters the test specimen through the inlet hose. Excess air inside the test specimen is then compressed and returns to the media tank through the specimen vent connector, solenoid valve, and vent hose. During installation, to prevent incomplete venting, the test specimen is tilted so that the side of the specimen inlet fixture is at its highest point, and the venting assembly is also located at the highest point of the test specimen. This increases the venting effect. Once the air inside the test specimen is completely vented, the pulse waveform of the specimen is significantly improved, becoming more consistent with the experimental standard waveform, and thus improving the accuracy of the specimen pulse test. Attached Figure Description

[0012] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, with the same or corresponding reference numerals denoteing the same or corresponding parts, wherein: Figure 1 This is a schematic diagram of the automatic exhaust device of this utility model; Figure 2 This is a schematic diagram of the pulse system structure of this utility model.

[0013] In the diagram: 1. Liquid supply hose; 2. Liquid supply connector; 3. Specimen inlet fixture; 4. First specimen vent connector; 5. Second specimen vent connector; 6. Solenoid valve; 7. Solenoid valve connector; 8. Vent hose; 9. Specimen; 10. Specimen blind end fixture; 11. Visual level gauge; 12. Suction filter; 13. Medium oil tank; 14. Manual ball valve; 15. Air filter; 16. Level relay; 17. Medium pump; 18. Filter; 19. Check valve; 20. Pneumatic ball valve. Detailed Implementation

[0014] The exemplary embodiments disclosed in this application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of this application are shown in the drawings, it should be understood that this application can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of this application and to fully convey the scope of this application to those skilled in the art. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0015] This utility model provides an automatic venting device for pulse blind-end specimens, such as... Figures 1 to 2 As shown, the medium unit of the device is connected to both the pulse unit and the test piece via a pipeline. The test piece has an exhaust port, and an exhaust assembly is installed on the exhaust port. The exhaust assembly is also connected to the medium unit via a pipeline. The pulse unit is the test end of the device.

[0016] In this way, by opening an exhaust port on the test piece and installing an exhaust assembly on the exhaust port, the gas inside the test piece can be discharged, which will greatly improve the pulse waveform of the test piece, making it more in line with the experimental standard waveform, and at the same time improving the accuracy of the pulse test of the test piece.

[0017] It should be noted that the pulse unit is existing technology, and as long as it can achieve pulse fatigue testing, it is sufficient, so it will not be elaborated here.

[0018] Specifically, such as Figure 1 As shown, the test specimen includes: a specimen inlet fixture 3, a specimen 9, and a specimen blind end fixture 10; one end of the specimen 9 is connected to the specimen inlet fixture 3, and the other end of the specimen 9 is connected to the specimen blind end fixture 10; an exhaust port is provided on the specimen inlet fixture 3.

[0019] In this way, when the test specimen liquid inlet fixture 3, the test specimen 9 and the test specimen blind end fixture 10 are installed, the test specimen is placed at an angle so that the side of the test specimen liquid inlet fixture 3 is at the highest point of the test specimen, and the exhaust component is also located at the highest point of the test specimen, which is conducive to the exhaust of gas in the test specimen; then when performing the pulse test, the test specimen can be placed horizontally.

[0020] Specifically, such as Figure 1 As shown, the exhaust assembly includes: a first test piece exhaust connector 4, a second test piece exhaust connector 5, a solenoid valve 6, a solenoid valve connector 7, and an exhaust hose 8; the first test piece exhaust connector 4 is connected to the exhaust port; the second test piece exhaust connector 5 is connected to the first test piece exhaust connector 4; the solenoid valve 6 is connected to the second test piece exhaust connector 5; the solenoid valve connector 7 is installed on the solenoid valve 6, and the solenoid valve 6 is connected to an external controller, which remotely controls the opening and closing of the solenoid valve 6 through an external control signal; one end of the exhaust hose 8 is connected to the solenoid valve connector 7, and the other end of the exhaust hose 8 is connected to the medium oil tank 13 through a pipeline.

[0021] In this way, during installation, the vent connector and vent hose 8 are positioned at the highest point of the test piece 9 to enhance the venting effect. Then, by switching the solenoid valve 6 on and off, when the media pump 17 is started, the solenoid valve 6 is opened, and the media enters the test piece from the inlet hose 1. Excess air inside the test piece then returns to the media tank 13 through the two vent connectors, solenoid valve 6, and vent hose 8, thus achieving automatic venting. When the media continues to be injected until it fills the entire test piece and flows out from the vent hose 8, it means that all air has been vented. At this point, the operator can observe (see the vent hose 8) the air being vented. The gas flowing out of the gas hose 8 is pure liquid without bubbles, or the exhaust is automatically determined by the exhaust time set by the system. The control system then closes the solenoid valve 6 to cut off the exhaust channel. At this time, the inside of the test piece becomes an incompressible closed system completely filled with liquid, which is ready for high-precision pulse testing. This will greatly improve the pulse waveform of the test piece, making it more in line with the experimental standard waveform, and improving the accuracy of the pulse test of the test piece. In addition, a certain amount of medium will be carried out when the gas is exhausted, but the exhausted gas will eventually return to the medium tank 13, thus avoiding the waste of medium.

[0022] Specifically, one end of the specimen inlet fixture 3 is provided with a liquid supply hose 1, and the specimen inlet fixture 3 is connected to the liquid supply hose 1 through a liquid supply connector 2; the liquid supply hose 1 is connected to the medium pump 17 through a pipeline; the medium pump 17 is connected to the medium oil tank 13 through a pipeline.

[0023] In this way, the connection between the liquid supply hose 1 and the medium pump 17 ensures that the medium is smoothly delivered from the medium tank 13 to the test piece, providing the necessary medium flow conditions for the venting process.

[0024] Specifically, the first test piece exhaust connector 4, the second test piece exhaust connector 5, and the liquid supply connector 2 can enable the rapid installation of the exhaust hose 8 and the liquid supply hose 1.

[0025] Specifically, a one-way valve 19 and a filter 18 are installed on the pipeline between the liquid supply hose 1 and the medium pump 17; a manual ball valve 14 and a suction filter 12 are installed on the pipeline between the medium pump 17 and the medium tank 13; an air filter 15 and a liquid level relay 16 are installed on the medium tank 13; and a visual liquid level gauge 11 is installed inside the medium tank 13.

[0026] like Figure 2 As shown, the entire system consists of a pulse unit, a medium unit, a test specimen, and an automatic venting assembly. Before the test, the automatic venting device for the blind end of the pulse specimen is connected to the medium unit via a liquid supply hose 1, and the venting hose 8 is connected to the medium tank 13. During the automatic venting process, the medium pump 17 pumps the medium from the medium tank 13 through the suction filter 12 and filter 18 into the automatic venting device for the blind end of the specimen. Simultaneously, an external controller controls the opening and closing of the solenoid valve 6 via a control signal to achieve the automatic venting function. During the automatic venting process, the solenoid valve 6 is in the open state. If there is air in the automatic venting device for the blind end of the specimen, it will return to the medium tank 13 through the solenoid valve 6, thus completing the venting.

[0027] like Figure 2 As shown, the visual level gauge 11, oil suction filter 12, medium oil tank 13, manual ball valve 14, air filter 15, level relay 16, filter 18, and check valve 19 are all auxiliary components. During the experiment, the manual ball valve 14 is in the normally open state. After the gas is discharged, the medium pump 17 fills the test piece with medium, and then the medium pump 17 is turned off. During the pulse process, the medium pump 17 is in the closed state, and the pneumatic ball valve 20 is in the closed state.

[0028] Implementation Process: First, select the corresponding specifications for the liquid supply hose 1, liquid supply connector 2, liquid inlet fixture 3, and blind end fixture 10 based on the different test specimens 9. Install the selected liquid inlet fixture 3, test specimen 9, and blind end fixture 10 according to the test standards. Then, install the liquid supply connector 2 on the liquid inlet fixture 3. Next, connect the industrial hose 1 to the liquid supply connector 2. The other end of the liquid supply hose 1 is connected to a media pump 17 via a pipeline, which can supply the media to the test specimen. Connect the first test specimen vent connector 4 to the vent hole on the liquid inlet fixture 3. Then, connect the second test specimen vent connector 5 to the first test specimen vent connector 4. Connect the solenoid valve 6 to the second test specimen vent connector 5. Then, install the solenoid valve connector 7 on the solenoid valve 6. Connect one end of the vent hose 8 to the solenoid valve connector 7 and the other end of the vent hose 8 to the media tank 13. This forms a circuit. When the solenoid valve 6 is activated, the automatic venting function is achieved.

[0029] It should be noted that the specific models and specifications of the solenoid valve 6, medium pump 17, check valve 19, filter 18, oil suction filter 12, manual ball valve 14, air filter 15, liquid level relay 16, and external controller need to be selected and determined according to the actual specifications of the device, and their internal structure is existing technology.

[0030] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An automatic venting device for pulse blind-end specimens, characterized in that, The medium unit of the device is connected to both the pulse unit and the test piece via a pipeline. The test piece has an exhaust port, and an exhaust assembly is installed on the exhaust port. The exhaust assembly is also connected to the medium unit via a pipeline. The pulse unit is the test end of the device.

2. The automatic exhaust device for pulse blind-end specimens according to claim 1, characterized in that, The medium unit is a medium tank (13) connected to a medium pump (17) via a pipeline and a manual ball valve (14). The other end of the medium pump (17) is connected to the pulse unit and the test piece via a pipeline, a check valve (19) and a filter (18).

3. The automatic exhaust device for pulse blind-end specimens according to claim 1, characterized in that, The test specimen includes: a specimen liquid inlet fixture (3), a specimen (9), and a specimen blind end fixture (10). One end of the test piece (9) is connected to the test piece liquid inlet fixture (3), and the other end of the test piece (9) is connected to the test piece blind end fixture (10). The vent is located on the liquid inlet fixture (3) of the specimen.

4. The automatic exhaust device for pulse blind-end specimens according to claim 1, characterized in that, The exhaust assembly includes: a first test specimen exhaust connector (4), a second test specimen exhaust connector (5), a solenoid valve (6), a solenoid valve connector (7), and an exhaust hose (8). The first specimen exhaust connector (4) is connected to the exhaust port; The second test piece exhaust connector (5) is connected to the first test piece exhaust connector (4); The solenoid valve (6) is connected to the exhaust port (5) of the second specimen. The solenoid valve connector (7) is installed on the solenoid valve (6), and the solenoid valve (6) is remotely controlled by an external control signal; One end of the exhaust hose (8) is connected to the solenoid valve connector (7), and the other end of the exhaust hose (8) is connected to the medium oil tank (13) through a pipeline.

5. The automatic exhaust device for pulse blind-end specimens according to claim 4, characterized in that, One end of the specimen liquid inlet fixture (3) is provided with a liquid supply hose (1), and the specimen liquid inlet fixture (3) is connected to the liquid supply hose (1) through a liquid supply connector (2); The liquid supply hose (1) is connected to the medium pump (17) via a pipeline.

6. The automatic exhaust device for pulse blind-end specimens according to claim 2, characterized in that, An air filter (15) and a liquid level relay (16) are provided on the medium oil tank (13). A visual level gauge (11) is installed inside the medium oil tank (13); The medium oil tank (13) is also equipped with an oil suction filter (12), which is connected to a manual ball valve (14) through a pipeline.

Images