A fatigue reciprocating device for pressure testing of test pieces

Abstract

The utility model relates to test equipment technical field, specifically disclose a kind of fatigue reciprocating device for test piece with pressure test;Including cabinet, turnover mechanism, measuring mechanism and drive part, cabinet contains control cabinet and the installation cabinet of integrated setting;Turnover mechanism is made of fixed base and the turnover seat that can be based on fixed base rotation, and drive part is equipped in turnover seat bottom;Measuring mechanism includes at least one pressure sensor with electric connection of measurement host and it, pressure sensor is equipped between the first mounting plate and the second mounting plate of fixed base top, and first mounting plate and the top of turnover seat are equipped with test piece mounting position. By adjusting drive part relevant components can realize the stepless adjustment of turnover angle and speed, adapt to a variety of special equipment test demand;Adopt pressure sensor impact, ensure pressure measurement accurate, without conversion can directly obtain actual data;Possess manual and automatic mode, can multi-angle observation test piece change.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, and in particular to a fatigue reciprocating device for pressure testing of test pieces. Background Technology

[0002] In the research and development and production of special equipment, fatigue reciprocating tests with pressure are a crucial step in evaluating the performance and reliability of test pieces. Currently, existing technologies have many problems in this regard.

[0003] On the one hand, there are many types of special equipment, and the required flipping angles vary greatly among different types. Taking automotive parts manufacturing as an example, as mentioned in patent "CN215491783U, A freely adjustable flipping angle mechanism," in the welding and assembly of automotive seat frames, due to the large size, heavy weight, and complex shape of the seat frames, traditional flipping mechanisms are unable to meet their specific flipping requirements. In actual production scenarios under this patent background, in the past, to meet the testing requirements of such special equipment, it was often necessary to manufacture a separate prototype for each test, which undoubtedly led to high manufacturing costs. Moreover, the process of manufacturing a separate prototype is cumbersome, requiring a large investment of time and manpower, making the testing efficiency extremely low.

[0004] On the other hand, existing technologies also have shortcomings in pressure testing. In some traditional testing devices, the installation position and method of the pressure sensor are unreasonable, making it susceptible to the impact generated during the test, resulting in large fluctuations in instrument readings and making it difficult to accurately measure the pressure borne by the test piece. Furthermore, traditional methods cannot directly observe the changes in downward pressure exerted by the test piece on the moving parts of special equipment at any angle; complex calculations are required to obtain the actual downward pressure data. This not only increases the complexity of the test but may also introduce more errors, reducing the accuracy and reliability of the test data.

[0005] The existing technology suffers from a series of technical problems, such as high testing costs, low efficiency, and inaccurate pressure measurement, due to the variety of special equipment and different rotation angles, the need to manufacture individual samples for each test, and the shortcomings in the pressure testing process. An innovative technical solution is urgently needed to solve these problems. Utility Model Content

[0006] In view of this, the present invention provides a fatigue reciprocating device for pressure testing of test specimens, in order to solve the technical problems of high cost and low efficiency caused by the large variety of special equipment and different rotation angles in the prior art, which require the separate manufacture of samples for each test.

[0007] This utility model provides a fatigue reciprocating device for pressure testing of test specimens, comprising: a cabinet including a control cabinet and an installation cabinet integrally formed with the control cabinet; a flipping mechanism including a fixed base disposed on the top of the control cabinet and a flipping base rotatable based on the fixed base, the bottom of the flipping base also having a driving part; a measuring mechanism including a measuring host and at least one pressure sensor electrically connected to the measuring host; the top of the fixed base is provided with a first mounting plate and a second mounting plate, the pressure sensor is disposed between the first mounting plate and the second mounting plate, and the first mounting plate and the top of the flipping base are provided with mounting positions for the test specimen.

[0008] Preferably, the driving unit is configured as a driving cylinder, which is driven by an air compressor; the bottom of the driving cylinder is fixedly connected to the top of the mounting cabinet, and the piston rod of the driving cylinder is hinged to the bottom of the flipping seat to drive the flipping seat to perform a flipping action.

[0009] Preferably, the control cabinet is equipped with a control system, which has a knob for controlling the gas flow of the air compressor to adjust the gas flow; the control system is also equipped with a first magnetic sensor and a second magnetic sensor via a telecommunication connection, which are respectively located at both ends of the drive cylinder body and are used to detect the extension of the piston rod to control the flipping angle of the flipping seat.

[0010] Preferably, the fixing base includes a fixing plate and a connecting arm disposed on the fixing plate, the connecting arm including a first connecting arm and a second connecting arm disposed on both sides of the fixing plate.

[0011] Preferably, a first reinforcing plate and a second reinforcing plate are respectively provided on both sides of the top of the fixing plate; the first connecting arm and the second connecting arm are respectively disposed at one end of the first reinforcing plate and the second reinforcing plate, and are integrally disposed with the first reinforcing plate and the second reinforcing plate; the first mounting plate is disposed on the top of the first connecting arm, the second connecting arm, the first reinforcing plate and the second reinforcing plate, and is fixedly connected with the first connecting arm, the second connecting arm, the first reinforcing plate and the second reinforcing plate.

[0012] Preferably, the flipping seat includes a seat body and a first hinge arm and a second hinge arm disposed on both sides of the seat body; the first hinge arm and the second hinge arm are respectively hinged to the first connecting arm and the second connecting arm to realize the flipping movement of the flipping seat based on the fixed seat.

[0013] Preferably, the top of the first hinge arm and the second hinge arm are further provided with a reinforcing part, the reinforcing part including a first set of ribs and a second set of ribs; the top of the first set of ribs and the second set of ribs are provided with a fixing mechanism for fixing the test piece.

[0014] Preferably, the measuring mechanism includes a first pressure sensor, a second pressure sensor, a third pressure sensor, and a fourth pressure sensor that are electrically connected to the measuring host; the first pressure sensor, the second pressure sensor, the third pressure sensor, and the fourth pressure sensor are respectively disposed at the four corners between the first mounting plate and the second mounting plate.

[0015] The fatigue reciprocating device for pressure testing of test specimens provided by this utility model has the following beneficial effects: In this invention, the fatigue reciprocating device for pressure testing of test specimens, through its freely adjustable tilting angle structure (adjusted via a magnetic induction switch), can adapt to the tilting angle requirements of most special equipment, eliminating the need to manufacture individual samples for different equipment, significantly reducing manufacturing costs and improving testing efficiency. Simultaneously, by designing the movable part of the special equipment's digital model as the fixed end of the device and the fixed part as the movable end, the impact on the pressure sensor is eliminated, making pressure measurement more accurate and allowing direct acquisition of the actual downward pressure data of the test specimen at any angle without conversion. Furthermore, the device features both manual and automatic modes, with stepless cylinder speed regulation via a gas flow knob, meeting diverse testing needs. It facilitates multi-angle observation of test specimen changes and efficiently completes fatigue reciprocating tests and records data, comprehensively improving the convenience, accuracy, and applicability of the test. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and these are all within the protection scope of this utility model.

[0017] Figure 1 This is a schematic diagram of a fatigue reciprocating device used for pressure testing of test specimens; Figure 2 This is a three-dimensional structural diagram of a fatigue reciprocating device used for pressure testing of test specimens; Figure 3 This is a three-dimensional structural diagram of a fatigue reciprocating device used for pressure testing of test specimens, taken from another angle. Parts and component numbers in the diagram: 100 - Cabinet, 110 - Control cabinet, 120 - Mounting cabinet, 121 - First pressure sensor, 122 - Second pressure sensor, 123 - Third pressure sensor, 124 - Fourth pressure sensor; 200-Flipping mechanism, 210-Fixed seat, 211-First reinforcing plate, 212-Second reinforcing plate, 213-Fixed plate, 214-First connecting arm, 215-Second connecting arm, 216-First mounting plate, 217-Second mounting plate, 220-Flipping seat, 221-Seat body, 222-First hinge arm, 223-Second hinge arm, 230-Reinforcing part, 231-First set of ribs, 232-Second set of ribs, 233-Fixed mechanism, 234-Installation position, 235-Limiting plate; 300 - Measuring mechanism; 310 - Measuring main unit; 400-Drive unit, 410-Drive cylinder, 411-Piston rod, 412-First magnetic sensor, 413-Second magnetic sensor. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, in this document, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Unless otherwise specified, embodiments of the present invention and the various features thereof can be combined with each other, all within the protection scope of the present invention. Example

[0019] Please see Figure 1This utility model provides a fatigue reciprocating device 100 for pressure testing of test specimens. When conducting fatigue reciprocating tests on test specimens of special equipment under pressure, due to the wide variety of special equipment and different rotation angles, the traditional method requires manufacturing a separate sample for each test, resulting in high cost and low efficiency. At the same time, the sensor is easily impacted during pressure testing, the readings are inaccurate, and complex conversions are required to obtain the actual data. However, this device 100 can adapt to the needs of most equipment by adjusting the rotation angle, reduce the production of sample specimens, accurately measure pressure and directly obtain data, and has both manual and automatic modes to meet diverse testing needs.

[0020] Please see Figure 1 In this embodiment, the fatigue reciprocating device 100 includes a cabinet 100 and a measuring mechanism 300; the cabinet 100 includes a control cabinet 110 and an installation cabinet 120 integrally formed with the control cabinet 110; the flipping mechanism 200 includes a fixed base 210 disposed on the top of the control cabinet 110 and a flipping base 220 rotatable based on the fixed base 210, and the bottom of the flipping base 220 is also provided with a driving part 400; the measuring mechanism 300 includes a measuring host 310 and at least one pressure sensor 121 electrically connected to the measuring host 310; the top of the fixed base 210 is provided with a first mounting plate 216 and a second mounting plate 217, the pressure sensor 121 is disposed between the first mounting plate 216 and the second mounting plate 217, and the first mounting plate 216 and the top of the flipping base 220 are provided with a test piece mounting position 234.

[0021] Please see Figure 2 and Figure 3 During testing, the fixed part of the test piece is first installed at the mounting position 234 on the top of the flip seat 220, and the movable part of the test piece (the side that needs to bear pressure) is placed on the first mounting plate 216 of the fixed seat 210, ensuring that the test piece is in close contact with the first mounting plate 216 and the flip seat 220, forming a force transmission chain of "flip seat 220-test piece-first mounting plate 216-pressure sensor 121-second mounting plate 217".

[0022] After the device is powered on, the control system in the control cabinet 110 enters the standby state, the measuring host 310 starts up and establishes a telecommunication connection with the pressure sensor 121 (such as wireless signal or wired transmission), the pressure sensor 121 initializes and feeds back the reference zero point (the initial pressure value when there is no test piece) to the measuring host 310 in real time.

[0023] The drive unit 400 (drive cylinder 410) pushes the tilting seat 220 to rotate around the hinge axis of the fixed seat 210 through its extension and retraction action, thereby achieving the angle tilting of the test piece. When the drive unit 400 extends, the tilting seat 220 tilts upward, and the test piece rotates synchronously with the tilting seat 220; when the drive unit 400 retracts, the tilting seat 220 returns to its original position downward, completing one reciprocating motion. This process can be adjusted by controlling the operating parameters (such as speed and frequency) of the drive unit 400 through the control cabinet 110 to achieve dynamic or static testing of the test piece at different angles.

[0024] During static testing, the drive unit 400 is adjusted to keep the tilting seat 220 at a specific angle (such as 15°, 30°, 90°, etc.), at which point the test piece remains stationary with the tilting seat 220. The pressure sensor 121 continuously monitors the static pressure of the test piece on the first mounting plate 216 at this angle, and the measuring host 310 records the pressure value under stable conditions, reflecting the load-bearing capacity or static stress characteristics of the test piece at a fixed angle (such as the structural stability when maintaining a certain angle for a long time).

[0025] Dynamic testing The control cabinet 110 controls the flipping seat 220 to reciprocate at a set frequency (e.g., 10 times / minute) via the drive unit 400. The drive unit 400 drives the flipping seat 220 to rotate continuously around the fixed seat 210, and the test piece cycles between different angles with the flipping seat 220. The pressure sensor 121 captures the dynamic pressure changes of the test piece on the first mounting plate 216 in real time during the flipping process, and the measuring host 310 records the pressure value fluctuation curve over time, reflecting the fatigue characteristics of the test piece under repeated stress (such as material fatigue limit and structural durability).

[0026] Pressure sensor 121 is sandwiched between first mounting plate 216 and second mounting plate 217. The pressure of the test piece is transmitted to pressure sensor 121 through first mounting plate 216. When the test piece is flipped by the flipping seat 220, its pressure on first mounting plate 216 will squeeze pressure sensor 121. The sensor converts the mechanical signal into an electrical signal (such as voltage or current signal) and transmits it to the measuring host 310 via wired or wireless means.

[0027] The measuring host 310 processes the electrical signal (such as filtering, amplification, and calibration) and finally outputs intuitive pressure values ​​(unit: N or kN) and change curves (time and pressure curves) on the display screen.

[0028] Specifically, static readings can be used to determine the load-bearing limit (such as the maximum pressure) of the test piece at a fixed angle and to assess its static structural strength; the fluctuation range and peak value of dynamic readings can reflect the stability of the test piece under repeated stress and determine whether it meets the design fatigue life requirements (such as a component needing to withstand 100,000 cycles of reciprocating pressure with a pressure decay of no more than 10%).

[0029] If the readings show abnormal pressure at a certain angle, this information can be fed back to the design phase to adjust the structural parameters of the test specimen or optimize the test plan.

[0030] For further details, please see Figure 2 and Figure 3 The drive unit 400 is configured as a drive cylinder 410, which is driven by an air compressor. The bottom of the drive cylinder 410 is fixedly connected to the top of the mounting cabinet 120, and the piston rod 411 of the drive cylinder 410 is hinged to the bottom of the flipping seat 220 to drive the flipping seat 220 to perform a flipping action.

[0031] Furthermore, the control cabinet 110 is equipped with a control system, which has a knob for controlling the gas flow of the air compressor to adjust the gas flow. The control system is also equipped with a first magnetic sensor 412 and a second magnetic sensor 413 via a telecommunication connection. The first magnetic sensor 412 and the second magnetic sensor 413 are respectively located at both ends of the drive cylinder 410 body and are used to detect the extension of the piston rod 411 to control the flipping angle of the flipping seat 220.

[0032] Specifically, the drive unit 400 uses a drive cylinder 410 driven by an air compressor, which provides stable and controllable power with the help of compressed air, ensuring that the tilting seat 220 tilts smoothly and avoiding uneven stress on the test piece. Its structure is simple, easy to maintain, and has a low failure rate. Furthermore, the piston rod 411 responds quickly, meeting the requirements of high-frequency fatigue testing. The hinged design also allows linear motion to be smoothly converted into rotational motion, ensuring flexible tilting.

[0033] The gas flow knob of the control system can adjust the gas flow of the air compressor and achieve stepless speed regulation of the rotation speed. This can not only adapt to the speed requirements of different test pieces, making it convenient to observe details or improve efficiency, but also adjust the speed according to the weight of the test piece to avoid inertial impact and ensure safety and data accuracy.

[0034] The first magnetic sensor 412 and the second magnetic sensor 413 are installed at both ends of the drive cylinder 410 body, which can accurately detect the extension of the piston rod 411, and thus control the flipping angle of the flipping seat 220. Users can set the angle range by adjusting the position of the sensors, eliminating the need for customized parts, reducing costs, and enabling automated reciprocating flipping action, reducing human error, ensuring test consistency, and laying the foundation for the accuracy of pressure testing.

[0035] Specifically, the tilting speed can be infinitely adjusted by regulating the air compressor; by adjusting the air flow rate of the air compressor, the extension and retraction speed of the piston rod 411 of the drive cylinder 410 can be precisely controlled, thereby adjusting the tilting speed of the tilting seat 220. This design can adapt to the tilting speed requirements of different test pieces (such as some tests requiring slow observation of details, while others require rapid completion of fatigue tests), improving the versatility of the device 100. For test pieces of different weights, adjusting the speed can avoid impacts or unstable movements caused by excessive inertia, ensuring test safety and data accuracy.

[0036] Furthermore, the fixing base 210 includes a fixing plate 213 and a connecting arm disposed on the fixing plate 213. The connecting arm includes a first connecting arm 214 and a second connecting arm 215 disposed on both sides of the fixing plate 213.

[0037] Furthermore, a first reinforcing plate 211 and a second reinforcing plate 212 are respectively provided on both sides of the top of the fixing plate 213; the first connecting arm 214 and the second connecting arm 215 are respectively disposed at one end of the first reinforcing plate 211 and the second reinforcing plate 212, and are integrally disposed with the first reinforcing plate 211 and the second reinforcing plate 212; the first mounting plate 216 is disposed on the top of the first connecting arm 214, the second connecting arm 215, the first reinforcing plate 211 and the second reinforcing plate 212, and is fixedly connected to the first connecting arm 214, the second connecting arm 215, the first reinforcing plate 211 and the second reinforcing plate 212.

[0038] Furthermore, the flip seat 220 includes a seat body 221 and a first hinge arm 222 and a second hinge arm 223 disposed on both sides of the seat body 221; the first hinge arm 222 and the second hinge arm 223 are respectively hinged to the first connecting arm 214 and the second connecting arm 215 to realize the flipping movement of the flip seat 220 based on the fixed seat 210.

[0039] In this embodiment, by hinged to the first hinge arm 222 and the second hinge arm 223 of the flipping seat 220 with the first connecting arm 214 and the second connecting arm 215 of the fixed seat 210 respectively, the flipping seat 220 can be flipped around the hinge point as an axis. In practical applications, this design facilitates the adjustment of the test piece mounted on the flipping seat 220 at different angles. For example, in some test scenarios that require simulating different working conditions or angles, the flipping seat 220 can be used to precisely adjust the test piece to the required angle position, thereby obtaining more comprehensive and accurate test data. Furthermore, the first reinforcing plate 211 and the second reinforcing plate 212 not only enhance the structural strength between the fixed plate 213 and the connecting arm, making the fixed seat 210 less prone to deformation or damage when bearing the weight of the flipping seat 220 and the test piece, as well as the forces generated during the flipping process, thus ensuring the stability and reliability of the entire structure and extending the service life of the equipment, but also helps to improve the smoothness of the flipping motion, reducing shaking and vibration caused by insufficient structural strength, and ensuring the accuracy of the test.

[0040] Furthermore, the top of the first hinge arm 222 and the second hinge arm 223 is also provided with a reinforcing part 230, the reinforcing part 230 includes a first set of ribs 231 and a second set of ribs 232; the top of the first set of ribs 231 and the second set of ribs 232 is provided with a fixing mechanism 233 for fixing the test piece.

[0041] Furthermore, the first set of ribs 231 and the second set of ribs 232 can further enhance the structural strength of the first hinge arm 222 and the second hinge arm 223. When the flipping seat 220 drives the test piece to flip, the force on the top is relatively complex. These two sets of ribs can effectively disperse these forces, prevent the top of the hinge arm from being damaged due to excessive force, and ensure that the entire flipping structure can operate stably.

[0042] Secondly, the fixing mechanism 233, located at the top of the rib, plays a crucial role in securing the test piece. It ensures the test piece remains stable during rotation at different angles, preventing displacement or detachment. The accuracy of the test piece's position is paramount during testing; even minute displacement can lead to deviations in the test data. The fixing mechanism 233, through a reliable connection, firmly secures the test piece, providing strong support for the accuracy of the test data.

[0043] Furthermore, from the perspective of overall equipment operation, the combination of the reinforcing section 230 and the fixing mechanism 233 helps optimize the overall performance of the equipment. The stable structure and reliable fixing enable the equipment to better cope with various complex testing requirements during long-term operation, reducing maintenance costs and downtime, and improving equipment utilization efficiency. At the same time, this design also enhances the equipment's versatility, enabling it to adapt to various types and specifications of test specimens, expanding its application range and meeting the needs of more diverse testing scenarios.

[0044] Specifically, the top of the first mounting plate 216 is provided with a limiting plate 235, and the limiting plate 235 and the first mounting plate 216 form an installation position 234; when installing the test piece, one end of the test piece is fixed to the fixing mechanism 233 with a special countersunk bolt, and the other end is placed in the installation position 234 and abuts against the limiting plate 235.

[0045] During the reciprocating bending fatigue test, the drive cylinder 410 drives the flipping mechanism 200 to rotate, thereby causing the test piece to move. At this time, the test piece moves and one end of it abuts against the limiting plate 235, thus completing the test. The reciprocating bending fatigue test of the test piece is achieved through the reciprocating motion of the drive cylinder 410.

[0046] Furthermore, the measuring mechanism 300 includes a first pressure sensor 121, a second pressure sensor 122, a third pressure sensor 123, and a fourth pressure sensor 124 that are electrically connected to the measuring host 310; the first pressure sensor 121, the second pressure sensor 122, the third pressure sensor 123, and the fourth pressure sensor 124 are respectively disposed at the four corners between the first mounting plate 216 and the second mounting plate 217.

[0047] Specifically, four pressure sensors, electrically connected to the measuring host 310, are respectively installed at the four corners between the first mounting plate 216 and the second mounting plate 217. These sensors can simultaneously collect pressure data from multiple stress points on the test piece. By measuring at multiple points, the pressure distribution of the test piece during different flipping angles or reciprocating motions can be comprehensively captured. This avoids the local deviations that may exist in single-point measurements and improves the accuracy and reliability of pressure detection through mutual verification of multiple sets of data. At the same time, the measuring host 310 can integrate and process the data from multiple sensors, making it easy to quickly obtain the overall stress state of the test piece. This provides more comprehensive and accurate data support for evaluating the performance of the test piece in fatigue reciprocating tests with pressure testing.

[0048] Furthermore, in this embodiment, the working process of the fatigue reciprocating device 100 for pressure testing of test specimens revolves around three core aspects: "rotation action driving - real-time pressure monitoring - precise angle control," as detailed below: Test piece installation The fixed part of the test piece is installed on the top of the flipping base 220, and the movable part is installed on the fixing mechanism 233 on the top of the first mounting plate 216 of the fixed base 210, with the other end abutting against the limiting plate 235; this allows the test piece to simulate the force conditions under actual working conditions during the flipping process. The pressure sensor 121 is clamped between the first mounting plate 216 and the second mounting plate 217, directly contacting the movable part of the test piece to ensure accurate force transmission.

[0049] Flip motion drive The drive unit 400 (drive cylinder 410) is powered by an air compressor, and its piston rod 411 is hinged to the bottom of the tilting seat 220. When the piston rod 411 extends or retracts, it drives the tilting seat 220 to rotate around the connecting arm of the fixed seat 210, thereby realizing the reciprocating tilting action of the test piece.

[0050] The flip angle is controlled by the control system through the first magnetic sensor 412 and the second magnetic sensor 413: the magnetic sensor detects the extension of the piston rod 411. When the piston rod 411 reaches the preset position, the control system controls the air compressor to stop or reverse the air supply, thereby limiting the maximum flip angle of the flip seat 220 (the angle range can be flexibly changed by adjusting the position of the magnetic sensor).

[0051] Its rotation speed is adjusted by the gas flow knob of the control cabinet 110: the knob controls the gas flow output by the air compressor, changes the action speed of the drive cylinder 410, and realizes stepless speed regulation during the rotation process.

[0052] Pressure signal transmission The pressure generated during the flipping of the test piece is transmitted to the pressure sensor 121 through the first mounting plate 216. The sensor converts the mechanical signal into an electrical signal and transmits it to the measuring host 310 in real time.

[0053] Furthermore, the device 100 supports both manual and automatic testing modes to meet the testing needs of different scenarios: Automatic mode (fatigue reciprocating test) Suitable for long-term, high-frequency fatigue performance evaluation. By controlling the system to preset the flip angle range (e.g., 0°-90°) and the number of reciprocations (e.g., 10,000 times), the drive cylinder 410 automatically drives the flipping seat 220 to flip back and forth according to the set parameters.

[0054] During the test, the pressure sensor 121 continuously collects pressure data of the test piece under different angles and different stress states, and the measuring host 310 synchronously records and stores the data to form a pressure change curve.

[0055] Manual mode (multi-angle static testing) Suitable for observing the instantaneous state of a test specimen at a specific angle. By manually controlling the start and stop of the drive cylinder 410, the flipping seat 220 is fixed at the target angle (such as 30°, 60°). At this time, the pressure sensor 121 can measure the static pressure value of the test specimen at this angle, which facilitates intuitive observation of deformation or stress details.

[0056] Furthermore, during reading, the pressure sensors 121 (such as the first pressure sensor 121, the second pressure sensor 122, the third pressure sensor 123, and the fourth pressure sensor 124 distributed at the four corners) directly bear the pressure transmitted by the test piece, convert the pressure value into an electrical signal, and then transmit it to the measuring host 310 via wired or wireless means. The measuring host 310 integrates the data from multiple sensors (such as calculating the average or peak value) to eliminate errors caused by uneven local force.

[0057] The measuring host 310 displays the current pressure value (usually in N or kgf) in real time on a screen and automatically records the pressure change curve over time and the rotation angle. Simultaneously, the control system records parameters such as the rotation angle and the number of reciprocations, forming a complete test log.

[0058] Please see Figure 3 The extension amount of piston rod 411 detected by the first magnetic sensor 412 and the second magnetic sensor 413 is converted into flip angle data (calculated through the preset "piston rod 411 stroke-angle" correspondence) and stored in association with pressure data to ensure that each pressure value corresponds to a specific flip angle.

[0059] Specifically, the pressure data directly reflects the stress resistance of the test specimen at different flipping angles: if the pressure value is abnormal at a certain angle (such as a sudden increase or decrease), it may indicate that there are structural weak points in the test specimen.

[0060] In fatigue testing, the durability of the test piece can be assessed and its design life requirements can be determined by analyzing the pressure change trend (such as the pressure decay rate) after multiple cycles.

[0061] If uneven pressure distribution is found during testing (such as excessively high sensor values ​​in a certain area), it can guide the optimization of the test specimen structure (such as adjusting material thickness or connection method).

[0062] When data is suspected to be unreliable, the actual pressure values ​​at different angles can be compared with the design expected values ​​to verify whether the test specimens meet the design standards and provide data support for the mass production of special equipment.

[0063] If a sudden pressure change or angle control abnormality occurs during the test, the cause of the fault can be quickly located by combining the synchronously recorded parameters (such as sensor failure, air leakage in drive cylinder 410, etc.), thus improving the maintenance efficiency of the device.

[0064] Through the above-mentioned working and testing methods, the device 100 realizes an integrated process of "adjustable flip angle - precise pressure measurement - automatic data recording", which effectively solves the problems of high cost, low efficiency and inaccurate data in traditional testing.

[0065] Furthermore, this reciprocating fatigue test can simulate durability under actual working conditions. The drive unit 400 drives the flipping seat 220 to reciprocate, so that the test piece is repeatedly subjected to force at different angles, simulating the long-term dynamic loads that it may experience in actual use (such as frequent angle changes and vibrations of special equipment during operation), thereby evaluating the structural stability of the test piece under long-term fatigue and determining whether it can meet the design service life requirements (for example, testing whether a component will show failure phenomena such as deformation or fracture after tens of thousands of reciprocating actions).

[0066] It can also verify structural strength and pressure-bearing capacity. During the test, pressure sensors (first pressure sensor 121, second pressure sensor 122, third pressure sensor 123, and fourth pressure sensor 124) monitor the pressure changes of the test specimen in real time at different rotation angles (static or dynamic), and can directly obtain its actual pressure-bearing data under various postures. This helps to verify whether the structural strength of the test specimen meets the design standards, such as whether it can withstand the preset pressure value at a specific angle without damage, and provides a basis for evaluating its safe load-bearing capacity.

[0067] It can also meet the personalized needs of different test specimens. The device achieves stepless adjustment of the flipping angle and speed by adjusting the relevant components of the drive unit 400, which can be adapted to the testing needs of a variety of special equipment. There is no need to manufacture samples separately for test specimens of different specifications and flipping angle requirements, which greatly reduces the cost caused by sample customization, while reducing test preparation time and improving test efficiency.

[0068] Furthermore, it supports multi-angle observation and comprehensive analysis. The device features both manual and automatic modes. The manual mode facilitates static observation of changes in deformation and stress details of the test specimen at specific angles; the automatic mode can efficiently complete fatigue reciprocating tests and record data. This flexibility allows testers to comprehensively analyze the performance of the test specimen from multiple perspectives, ensuring the comprehensiveness of the test results.

[0069] The most common method is to directly acquire real pressure data by using pressure sensors (first pressure sensor 121, second pressure sensor 122, third pressure sensor 123, and fourth pressure sensor 124) directly positioned in the force transmission path between the test piece and the fixed base 210 (between the first mounting plate 216 and the second mounting plate 217). This avoids the impact caused by improper sensor installation in traditional testing, ensuring accurate pressure measurement. Furthermore, it allows for direct acquisition of actual pressure data of the test piece at any angle without complex calculations, reducing errors that may be introduced during conversion and improving data reliability.

[0070] When the detected pressure does not meet the preset requirements, the test specimen can be adjusted based on real-time data until it meets the pressure standard. This process ensures that the test specimen meets the performance standards before being put into practical application, reducing subsequent problems caused by substandard performance.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A fatigue reciprocating device for pressure testing of test specimens, characterized in that, include: The cabinet (100) includes a control cabinet (110) and an installation cabinet (120) integrated with the control cabinet (110). The flipping mechanism (200) includes a fixed base (210) disposed on the top of the control cabinet (110) and a flipping base (220) that can rotate based on the fixed base (210). The bottom of the flipping base (220) is also provided with a drive unit (400). The measuring mechanism (300) includes a measuring host (310) and at least one pressure sensor that is electrically connected to the measuring host (310); The top of the fixed base (210) is provided with a first mounting plate (216) and a second mounting plate (217), the pressure sensor is disposed between the first mounting plate (216) and the second mounting plate (217), and the top of the first mounting plate (216) and the flip base (220) are provided with a test piece mounting position (234).

2. The fatigue reciprocating device for pressure testing of test specimens according to claim 1, characterized in that, The drive unit (400) is configured as a drive cylinder (410), which is driven by an air compressor; The bottom of the drive cylinder (410) is fixedly connected to the top of the mounting cabinet (120), and the piston rod (411) of the drive cylinder (410) is hinged to the bottom of the flipping seat (220) to drive the flipping seat (220) to perform a flipping action.

3. The fatigue reciprocating device for pressure testing of test specimens according to claim 2, characterized in that, The control cabinet (110) is equipped with a control system, which has a knob for controlling the gas flow of the air compressor to adjust the gas flow. The control system is also equipped with a first magnetic sensor (412) and a second magnetic sensor (413) via a telecommunication connection. The first magnetic sensor (412) and the second magnetic sensor (413) are respectively located at both ends of the body of the drive cylinder (410) and are used to detect the extension amount of the piston rod (411) in order to control the flipping angle of the flipping seat (220).

4. The fatigue reciprocating device for pressure testing of test specimens according to claim 1, characterized in that, The fixing base (210) includes a fixing plate (213) and a connecting arm disposed on the fixing plate (213). The connecting arm includes a first connecting arm (214) and a second connecting arm (215) disposed on both sides of the fixing plate (213).

5. A fatigue reciprocating device for pressure testing of test specimens according to claim 4, characterized in that, The top of the fixing plate (213) is also provided with a first reinforcing plate (211) and a second reinforcing plate (212) on both sides respectively. The first connecting arm (214) and the second connecting arm (215) are respectively disposed at one end of the first reinforcing plate (211) and the second reinforcing plate (212), and are integrally disposed with the first reinforcing plate (211) and the second reinforcing plate (212); The first mounting plate (216) is disposed on the top of the first connecting arm (214), the second connecting arm (215), the first reinforcing plate (211) and the second reinforcing plate (212), and is fixedly connected to the first connecting arm (214), the second connecting arm (215), the first reinforcing plate (211) and the second reinforcing plate (212).

6. A fatigue reciprocating device for pressure testing of test specimens according to claim 4, characterized in that, The flip seat (220) includes a seat body (221) and a first hinge arm (222) and a second hinge arm (223) disposed on both sides of the seat body (221). The first hinge arm (222) and the second hinge arm (223) are hinged to the first connecting arm (214) and the second connecting arm (215) respectively, so as to realize the flipping seat (220) based on the fixed seat (210) flipping movement.

7. A fatigue reciprocating device for pressure testing of test specimens according to claim 6, characterized in that, The top of the first hinge arm (222) and the second hinge arm (223) are also provided with a reinforcing part (230), the reinforcing part (230) includes a first set of ribs (231) and a second set of ribs (232); The top of the first set of ribs (231) and the second set of ribs (232) is provided with a fixing mechanism (233) for fixing the test piece.

8. A fatigue reciprocating device for pressure testing of test specimens according to claim 1, characterized in that, The measuring mechanism (300) includes a first pressure sensor (121), a second pressure sensor (122), a third pressure sensor (123), and a fourth pressure sensor (124) that are electrically connected to the measuring host (310). The first pressure sensor (121), the second pressure sensor (122), the third pressure sensor (123) and the fourth pressure sensor (124) are respectively disposed at the four corners between the first mounting plate (216) and the second mounting plate (217).

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