A bellows fatigue life detection system and detection method

Abstract

The present invention provides a bellows fatigue life detection system and detection method, which belongs to the field of bellows detection technology, and solves the problems of insufficient motion control accuracy, significant motion overshoot phenomenon and single test conditions in the detection process of traditional bellows fatigue life detection devices. The bellows fatigue life detection system of the present invention includes a truss, a bottom sliding unit is arranged at the bottom of the truss, a second air guide device is driven translationally on the bottom sliding unit, a first air guide device is arranged on one side of the truss, and a detection station is formed between the first air guide device and the second air guide device. The present invention can achieve high-precision positioning and control by using a bottom slide servo motor, a first slide servo motor and a second slide servo motor in conjunction with the application of an encoder; the design of the present invention takes into account different test requirements and environmental conditions, and can adapt to a wider range of test conditions by adjusting the slide position.

Description

Technical Field

[0001] The invention belongs to the technical field of bellows detection, and in particular to a bellows fatigue life detection system and a detection method. Background Art

[0002] In fluid and gas transmission systems, bellows are widely used due to their flexibility and pressure resistance. However, the bellows in these systems are often exposed to harsh conditions such as high pressure, temperature fluctuations and mechanical movement. Long-term use will accumulate fatigue damage, which may lead to performance degradation or even dangerous failures. Therefore, evaluating and ensuring the fatigue life of bellows is the key to ensuring their structural reliability and system safety.

[0003] Therefore, bellows fatigue life testing has become a crucial technical task, and its main goal is to accurately predict the service life of bellows under different working conditions and promptly identify any potential defects or damage that may cause bellows failure. However, traditional bellows fatigue life testing devices have many challenges, including insufficient motion control accuracy during the testing process, complex error correction, significant motion overshoot, and single test conditions. Summary of the invention

[0004] The purpose of the present invention is to solve the above problems in the prior art and to propose a bellows fatigue life detection system and detection method.

[0005] The object of the present invention can be achieved by the following technical solutions: A bellows fatigue life detection system, comprising a truss, a bottom sliding unit is arranged at the bottom of the truss, a second air guide device is driven to translate on the bottom sliding unit, a first air guide device is arranged on one side of the truss, and a detection station is formed between the first air guide device and the second air guide device;

[0006] The bottom sliding unit comprises a bottom slide, the bottom slide is driven by a bottom slide servo motor, auxiliary slide rails are arranged in parallel on both sides of the bottom slide, a connecting frame is arranged on the bottom slide, the bottom of the connecting frame is connected to the auxiliary slide rails by a sliding block to form a guide connection, and a column is vertically arranged on the connecting frame;

[0007] The first air guide device includes a first side slide vertically fixed to the side of the truss, the first side slide is driven by a first slide servo motor, a first air guide unit is arranged on the first side slide, the first air guide unit includes a first base fixedly connected to the first side slide, a first rotating cylinder is fixedly arranged on the first base, the first rotating cylinder is rotatably connected to the first air guide, and the first air guide is rotatably mounted on the first base through a bearing seat;

[0008] The second air guide device includes a second side slide fixed on the column, the second side slide is driven by a second slide servo motor, a second air guide unit is arranged on the second side slide, the second air guide unit includes a second base fixedly connected to the second side slide, a second rotating cylinder is fixedly arranged on the second base, the second rotating cylinder is rotatably connected to the second air guide, the second air guide is rotatably mounted on the second base through a bearing seat, an air inlet is arranged on the second air guide, the air inlet is connected to a first interface of a three-way pipe, the second interface of the three-way pipe is connected to an air pressure monitor, and the third interface of the three-way pipe is connected to an external air source;

[0009] A horizontal proximity switch is fixedly arranged at one end of the auxiliary slide rail, a first vertical proximity switch is fixedly arranged at one end of the first side slide, and a second vertical proximity switch is fixedly arranged at one end of the second side slide;

[0010] The bellows fatigue life detection system also includes a controller, which is provided with an industrial control screen; the horizontal proximity switch, the first proximity switch, the second proximity switch, the air pressure monitor, the bottom slide servo motor, the first slide servo motor, the second slide servo motor, the first rotary cylinder and the second rotary cylinder are all connected to the controller through a circuit.

[0011] Preferably, the bottom slide servo motor is provided with a bottom encoder, the first slide servo motor is provided with a first encoder, the second slide servo motor is provided with a second encoder, and the bottom encoder, the first encoder and the second encoder are all connected to the controller through a circuit.

[0012] The encoder is a feedback device that provides precise information about the motor shaft position, ensuring motion control accuracy and efficiency in the system. The following are the main functions and roles of the encoder in this system:

[0013] 1. Precise positioning: The encoder provides real-time and accurate position data to the control system by monitoring the angular position of the servo motor shaft. These data allow the servo motor to perform position control with extremely high precision, ensuring that the detection position of the bellows is accurate;

[0014] 2. Enhanced closed-loop control: The servo motor uses feedback data from the encoder to achieve closed-loop control; this means that the motor not only receives instructions to move, but also continuously monitors the difference between its actual position and the target position and automatically adjusts it; this dynamic adjustment helps the system maintain motion accuracy and optimize performance under various operating conditions.

[0015] 3. Smooth motion: High-resolution encoders can detect very small position changes, making motor control smoother. This is essential for maintaining the stability of mechanical systems and reducing vibration, especially during testing processes that require delicate operations.

[0016] 4. Dynamic parameter adjustment: In the fatigue life test of bellows, it is necessary to adjust the operating parameters of the motor, such as speed and acceleration, according to different test stages. The real-time feedback of the encoder enables the control system to dynamically adjust these parameters according to the current motion state and environmental conditions to achieve optimal operation.

[0017] 5. Error correction and cumulative error reduction: During long-term operation, even small position errors may accumulate into large deviations. The feedback data from the encoder can be used to identify these errors and correct them when the motor reaches the proximity switch position to ensure long-term operation accuracy.

[0018] Preferably, the air pressure monitor is provided with an air pressure monitoring buzzer, the horizontal proximity switch is provided with a horizontal switch buzzer, the first proximity switch is provided with a first switch buzzer, and the second proximity switch is provided with a second switch buzzer.

[0019] A method for detecting the fatigue life of a bellows is disclosed. The method for detecting the fatigue life of a bellows uses a bellows fatigue life detection system to perform fatigue life detection on the bellows. The method for detecting the fatigue life of the bellows includes three detection modes, namely, a transverse mode, a longitudinal mode, and a bidirectional mode. The specific steps of the method for detecting the fatigue life of the bellows are as follows:

[0020] S1 Select the test mode and input parameters: select one mode from the transverse mode, longitudinal mode and bidirectional mode as the test mode, and test the fatigue life of the bellows in the test mode;

[0021] Input the bellows diameter, length, target gas pressure and gas pressure threshold on the industrial control screen;

[0022] Enter the moving frequency value, moving distance value and horizontal fatigue load value of the bottom slide in the test mode;

[0023] Input the moving frequency value, moving distance value and vertical fatigue load value of the second side slide in the test mode;

[0024] S2 adjusts the position: moves the bottom slide, the first side slide and the second side slide to the designated position in the test mode;

[0025] S3 ventilation: one end of the bellows is fixedly connected to the first gas guide platform, and the other end of the bellows is fixedly connected to the second gas guide platform; the gas in the external gas source is introduced into the bellows through the three-way pipe, so that the gas pressure value of the metal bellows is the target gas pressure value;

[0026] S4 detection: Start the control system, run the bellows life detection process in the test mode, and perform life detection on the bellows;

[0027] S5 stop: The air pressure value in the bellows is monitored in real time through the air pressure sensor. When the air pressure value of the bellows drops to the set gas pressure threshold, the air pressure monitoring buzzer sounds an alarm, it is determined that the bellows is ruptured, and the detection ends.

[0028] Preferably, the specific steps of performing life detection on the bellows in the transverse mode are as follows;

[0029] A1 Select the test mode and input parameters: Select the transverse mode as the test mode and test the fatigue life of the bellows in the transverse mode;

[0030] Input the bellows diameter, length, target gas pressure and gas pressure threshold on the industrial control screen;

[0031] Input the moving frequency value, moving distance value and horizontal fatigue load value of the bottom slide;

[0032] Input the second side slide movement frequency as 0, movement distance as 0 and vertical fatigue as 0;

[0033] The movement distance of the bottom slide is determined by the following formula: L=4R+1.57T; where T is the movement distance, R is the minimum dynamic bending radius, and L is the flexible length of the metal hose;

[0034] A2 Adjust position: Move the bottom slide, the first side slide and the second side slide to the specified position in the horizontal mode;

[0035] A3 ventilation: connect one end of the bellows to the first gas guide platform, and connect the other end of the bellows to the second gas guide platform; introduce the gas from the external gas source into the bellows through the three-way pipe, so that the gas pressure value of the metal bellows reaches the target gas pressure value;

[0036] A4 detection: The controller controls the first rotating cylinder to drive the first air guide table to rotate, and the controller controls the second rotating cylinder to drive the second air guide table to rotate, so that the two ends of the bellows are at the same horizontal position;

[0037] Within the movement distance of the bottom slide, the controller controls the bottom slide to reciprocate according to the movement frequency, and applies a horizontal fatigue load to the bellows;

[0038] A5 Stop: The air pressure sensor monitors the air pressure value in the bellows in real time. When the air pressure value of the bellows drops to the set gas pressure threshold, the air pressure monitoring buzzer sounds an alarm, indicating that the bellows is ruptured and the detection ends.

[0039] Preferably, the specific steps of performing life detection on the bellows in the longitudinal mode are as follows;

[0040] B1 Select the test mode and input parameters: Select the longitudinal mode as the test mode and test the fatigue life of the bellows in the longitudinal mode;

[0041] Input the bellows diameter, length, target gas pressure and gas pressure threshold on the industrial control screen;

[0042] Input the bottom slide's moving frequency as 0, moving distance as 0, and horizontal fatigue load as 0;

[0043] Input the moving frequency value, moving distance value and vertical fatigue load value of the second side slide;

[0044] The movement distance of the second side slide is calculated by the formula L=4R+0.5T; L is the flexible length of the metal hose, R is the minimum dynamic bending radius, and T is the movement distance;

[0045] B2 Adjust position: Move the bottom slide, the first side slide and the second side slide to the specified position in the portrait mode;

[0046] B3 ventilation: connect one end of the bellows to the first gas guide platform, and connect the other end of the bellows to the second gas guide platform; introduce the gas from the external gas source into the bellows through the three-way pipe, so that the gas pressure value of the metal bellows reaches the target gas pressure value;

[0047] B4 test: within the movement distance of the second side slide, the controller controls the second slide to reciprocate according to the movement frequency, and applies vertical fatigue load to the bellows;

[0048] B5 Stop: The air pressure value in the bellows is monitored in real time through the air pressure sensor. When the air pressure value of the bellows drops to the set gas pressure threshold, the air pressure monitoring buzzer sounds an alarm, indicating that the bellows is ruptured and the detection ends.

[0049] Preferably, the specific steps of performing life detection on the bellows in bidirectional mode are as follows;

[0050] C1 Select the test mode and input parameters: Select the bidirectional mode as the test mode and test the fatigue life of the bellows in the bidirectional mode;

[0051] Input the bellows diameter, length, target gas pressure and gas pressure threshold on the industrial control screen;

[0052] Input the moving frequency value, moving distance value and horizontal fatigue load value of the bottom slide;

[0053] Input the moving frequency value, moving distance value and vertical fatigue load value of the second side slide;

[0054] C2 adjust position: move the bottom slide, the first side slide and the second side slide to the specified position in the bidirectional mode;

[0055] C3 ventilation: connect one end of the bellows to the first gas guide platform, and connect the other end of the bellows to the second gas guide platform; introduce the gas from the external gas source into the bellows through the three-way pipe, so that the gas pressure value of the metal bellows reaches the target gas pressure value;

[0056] C4 detection: The controller controls the first rotary cylinder to drive the first air guide table to rotate, and the controller controls the second rotary cylinder to drive the second air guide table to rotate, so that the two ports of the bellows are at the same horizontal position;

[0057] Within the movement distance of the bottom slide, the controller controls the bottom slide to reciprocate according to the movement frequency, and applies a horizontal fatigue load to the bellows; at the same time, within the movement distance of the second side slide, the controller controls the second side slide to reciprocate according to the movement frequency, and applies a vertical fatigue load to the bellows;

[0058] In the process of controlling the movement of the bottom slide and the second side slide, the controller controls the second rotary cylinder to rotate the second air guide table and controls the first rotary cylinder to rotate the first air guide table, so that the two ports of the bellows are always in a symmetrical state, and the port of the bellows connected to the second air guide table always points to the direction of the combined velocity vector of the movement direction of the bottom slide and the movement direction of the second side slide;

[0059] C5 stop: The air pressure value in the bellows is monitored in real time through the air pressure sensor. When the air pressure value of the bellows drops to the set gas pressure threshold, the air pressure monitoring buzzer sounds an alarm, indicating that the bellows is ruptured and the detection ends.

[0060] Compared with the prior art, the present invention has the following beneficial effects:

[0061] 1. Precise control and positioning: By using the bottom slide servo motor, the first slide servo motor and the second slide servo motor, and the application of encoders, this system can achieve high-precision positioning and control. The encoder provides precise position feedback, allowing the system to accurately control the position of each component, which is crucial to ensure the accuracy and repeatability of detection.

[0062] 2. Automation and efficiency: The system has a high degree of automation. By connecting the circuit to the controller and cooperating with the industrial control screen, the automated detection process can be realized, which greatly improves the convenience of operation and detection efficiency. The application of the controller can also monitor the operating status of the entire system in real time, adjust the operating parameters in time, and ensure the continuity and stability of the detection.

[0063] 3. Improved safety: By setting proximity switches and buzzers, the system is equipped with safety warning functions at key locations. When the equipment runs to the limit position or an abnormality occurs, the buzzer will issue a warning in time to protect the safety of operators and equipment and avoid accidents.

[0064] 4. Adaptability to expanded test conditions: The system is designed with different test requirements and environmental conditions in mind. By adjusting parameters such as the slide position and air pressure, it can adapt to a wider range of test conditions. This flexibility enables the system to be used for different types of bellows and a variety of complex application scenarios, improving its practicality and scope of application.

[0065] 5. Real-time monitoring and feedback: The air pressure monitor and the three-way pipe design connected to it can monitor the air pressure changes during the test in real time to ensure the stability of the test conditions. The setting of the air pressure monitoring buzzer further increases the timeliness of monitoring. Once the air pressure is abnormal, it can respond quickly to ensure the accuracy of the test.

[0066] In summary, the present invention greatly improves the accuracy, efficiency and safety of bellows fatigue life testing by integrating multiple technologies such as high-precision control systems, automated operations and real-time monitoring feedback. These features make the detection system very valuable in industrial applications, and it is especially suitable for production environments that require high-frequency and high-standard testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 It is an overall three-dimensional structural diagram of the present invention.

[0068] Figure 2 It is a three-dimensional structural diagram of the air guide platform in the present invention.

[0069] Figure 3 It is a side plan view of the present invention.

[0070] In the figure, 1 is a truss; 2 is a second side slide; 2-1 is a servo motor for the second side slide; 3 is a column; 4 is a bottom slide; 4-1 is a servo motor for the bottom slide; 4-2 is an auxiliary slide rail; 5 is a first side slide; 5-1 is a servo motor for the first side slide; 6 is a second air guide device; 6-1 is a second rotary cylinder; 6-2 is a second air guide table; 6-3 is a three-way pipe; 6-4 is an air pressure sensor; 6-5 is a second base; 7 is a first air guide device; 7-1 is a first rotary cylinder; 7-2 is a first air guide table; 7-3 is a second base. DETAILED DESCRIPTION

[0071] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments. Embodiment 1

[0072] like Figures 1 to 3 As shown, a bellows fatigue life detection system comprises a truss 1, a bottom sliding unit is arranged at the bottom of the truss 1, a second air guide device 6 is driven to translate on the bottom sliding unit, a first air guide device 7 is arranged on one side of the truss 1, and a detection station is formed between the first air guide device 7 and the second air guide device 6;

[0073] The bottom sliding unit includes a bottom slide 4, which is driven by a bottom slide servo motor 4-1. Auxiliary slide rails 4-2 are arranged in parallel on both sides of the bottom slide 4. A connecting frame is arranged on the bottom slide 4. The bottom of the connecting frame is connected to the auxiliary slide rails 4-2 by a sliding block to form a guide connection. A column 3 is vertically arranged on the connecting frame.

[0074] like Figure 1 and 2 As shown, the first air guide device 7 includes a first side slide 5 vertically fixed to the side of the truss 1, the first side slide 5 is driven by a first slide servo motor 5-1, a first air guide unit is arranged on the first side slide 5, the first air guide unit includes a first base 7-2 fixedly connected to the first side slide 5, a first rotating cylinder 7-1 is fixedly arranged on the first base 7-2, the first rotating cylinder 7-1 is rotatably connected to the first air guide platform 7-2, and the first air guide platform 7-2 is rotatably installed on the first base 7-2 through a bearing seat;

[0075] like Figure 3 As shown, the second air guide device 6 includes a second side slide 2 fixed on the column 3, the second side slide 2 is driven by a second slide servo motor 2-1, a second air guide unit is arranged on the second side slide 2, the second air guide unit includes a second base 6-5 fixedly connected to the second side slide 2, a second rotating cylinder 6-1 is fixedly arranged on the second base 6-5, the second rotating cylinder 6-1 is rotationally connected to the second air guide platform 6-2, the second air guide platform 6-2 is rotationally installed on the second base 6-5 through a bearing seat, an air inlet is arranged on the second air guide platform 6-2, the air inlet is connected to the first interface of the three-way pipe 6-3, the second interface of the three-way pipe 6-3 is connected to the air pressure sensor 6-4, and the third interface of the three-way pipe 6-3 is connected to an external air source.

[0076] A horizontal proximity switch is fixedly arranged at one end of the auxiliary slide rail 4 - 2 , a first vertical proximity switch is fixedly arranged at one end of the first side slide 5 , and a second vertical proximity switch is fixedly arranged at one end of the second side slide 2 .

[0077] The bellows fatigue life detection system also includes a controller, which is equipped with an industrial control screen; the horizontal proximity switch, the first proximity switch, the second proximity switch, the air pressure monitor 6-4, the bottom slide servo motor 4-1, the first slide servo motor 5-1, the second slide servo motor 2-1, the first rotary cylinder 7-1 and the second rotary cylinder 6-1 are all connected to the controller through a circuit.

[0078] Preferably, the bottom slide servo motor 4-1 is provided with a bottom encoder, the first side slide servo motor 5-1 is provided with a first encoder, and the second side slide servo motor 2-1 is provided with a second encoder. The bottom encoder, the first encoder, and the second encoder are all connected to the controller through a circuit.

[0079] Preferably, the air pressure sensor 6-4 is provided with an air pressure monitoring buzzer, the horizontal proximity switch is provided with a horizontal switch buzzer, the first proximity switch is provided with a first switch buzzer, and the second proximity switch is provided with a second switch buzzer. Specific embodiment 2:

[0080] The bellows fatigue life detection system of the first embodiment is used to detect the life of the bellows. The detection method includes three detection modes, namely, a transverse mode, a longitudinal mode and a bidirectional mode.

[0081] The specific steps for life testing of bellows in transverse mode are as follows:

[0082] A1 Select the test mode and input parameters: Select the transverse mode as the test mode and test the fatigue life of the bellows in the transverse mode;

[0083] Enter the bellows diameter, length, target gas pressure and gas pressure threshold on the industrial control screen;

[0084] Input the moving frequency value, moving distance value and horizontal fatigue load value of the bottom slide 4;

[0085] Input the moving frequency, moving distance and vertical fatigue of the second side slide 2 as 0;

[0086] A2 adjusts the position: moves the bottom slide 4, the first side slide 5 and the second side slide 2 to the designated positions in the horizontal mode;

[0087] A3 ventilation: one end of the bellows is fixedly connected to the first gas guide platform 7-2, and the other end of the bellows is fixedly connected to the second gas guide platform 6-2; the gas in the external gas source is introduced into the bellows through the three-way pipe 6-3, so that the gas pressure value of the metal bellows is the target gas pressure value;

[0088] A4 detection: The controller controls the first rotary cylinder 7-1 to drive the first air guide platform 7-2 to rotate, and the controller controls the second rotary cylinder 6-1 to drive the second air guide platform 6-2 to rotate, so that the two ends of the bellows are at the same horizontal position;

[0089] Within the movement distance of the bottom slide 4, the bottom slide 4 is controlled by a controller to reciprocate according to the movement frequency, and a horizontal fatigue load is applied to the bellows;

[0090] A5 stop: The air pressure value in the bellows is monitored in real time through the air pressure sensor 6-4. When the air pressure value of the bellows drops to the set gas pressure threshold, the air pressure monitoring buzzer sounds an alarm, it is determined that the bellows is ruptured, and the detection ends.

[0091] The specific steps for life testing of bellows in longitudinal mode are as follows:

[0092] B1 Select the test mode and input parameters: Select the longitudinal mode as the test mode and test the fatigue life of the bellows in the longitudinal mode;

[0093] Enter the bellows diameter, length, target gas pressure and gas pressure threshold on the industrial control screen;

[0094] Input the moving frequency, moving distance and horizontal fatigue load of the bottom slide 4 as 0;

[0095] Input the moving frequency value, moving distance value and vertical fatigue load value of the second side slide 2;

[0096] B2 adjust the position: move the bottom slide 4, the first side slide 5 and the second side slide 2 to the designated positions in the longitudinal mode;

[0097] B3 ventilation: one end of the bellows is fixedly connected to the first gas guide platform 7-2, and the other end of the bellows is fixedly connected to the second gas guide platform 6-2; the gas in the external gas source is introduced into the bellows through the three-way pipe 6-3, so that the gas pressure value of the metal bellows is the target gas pressure value;

[0098] B4 test: within the movement distance of the second side slide 2, the controller controls the second slide 2 to reciprocate according to the movement frequency, and applies a vertical fatigue load to the bellows;

[0099] B5 Stop: The air pressure value in the bellows is monitored in real time through the air pressure sensor 6-4. When the air pressure value of the bellows drops to the set gas pressure threshold, the air pressure monitoring buzzer sounds an alarm, it is determined that the bellows is ruptured, and the detection ends.

[0100] The specific steps for life testing of bellows in bidirectional mode are as follows:

[0101] C1 Select the test mode and input parameters: Select the bidirectional mode as the test mode and test the fatigue life of the bellows in the bidirectional mode;

[0102] Input the bellows diameter, length, target gas pressure and gas pressure threshold on the industrial control screen;

[0103] Input the moving frequency value, moving distance value and horizontal fatigue load value of the bottom slide 4;

[0104] Input the moving frequency value, moving distance value and vertical fatigue load value of the second side slide 2;

[0105] C2 adjust position: move the bottom slide 4, the first side slide 5 and the second side slide 2 to the designated positions in the bidirectional mode;

[0106] C3 ventilation: one end of the bellows is fixedly connected to the first gas guide platform 7-2, and the other end of the bellows is fixedly connected to the second gas guide platform 6-2; the gas in the external gas source is introduced into the bellows through the three-way pipe 6-3, so that the gas pressure value of the metal bellows is the target gas pressure value;

[0107] C4 detection: The controller controls the first rotary cylinder 7-1 to drive the first air guide table 7-2 to rotate, and the controller controls the second rotary cylinder 6-1 to drive the second air guide table 6-2 to rotate, so that the two ports of the bellows are at the same horizontal position;

[0108] Within the movement distance of the bottom slide 4, the controller controls the bottom slide 4 to reciprocate according to the movement frequency, and applies a horizontal fatigue load to the bellows; at the same time, within the movement distance of the second side slide 2, the controller controls the second side slide 2 to reciprocate according to the movement frequency, and applies a vertical fatigue load to the bellows;

[0109] In the process of controlling the movement of the bottom slide 4 and the second side slide 2, the controller controls the second rotary cylinder 6-1 to rotate the second air guide table 6-2 and controls the first rotary cylinder 7-1 to rotate the first air guide table 7-2, so that the two ports of the bellows are always in a symmetrical state, and the port of the bellows connected to the second air guide table 6-2 always points to the direction of the combined velocity vector of the movement direction of the bottom slide 4 and the movement direction of the second side slide 2;

[0110] C5 stop: The air pressure value in the bellows is monitored in real time through the air pressure sensor 6-4. When the air pressure value of the bellows drops to the set gas pressure threshold, the air pressure monitoring buzzer sounds an alarm, it is determined that the bellows is ruptured, and the detection ends.

[0111] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0112] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A bellows fatigue life detection system, comprising a truss, characterized in that: A bottom sliding unit is provided at the bottom of the truss, and a second air guide device is driven to translate on the bottom sliding unit. A first air guide device is provided at one side of the truss, and a detection station is formed between the first air guide device and the second air guide device; The bottom sliding unit comprises a bottom slide, the bottom slide is driven by a bottom slide servo motor, auxiliary slide rails are arranged in parallel on both sides of the bottom slide, a connecting frame is arranged on the bottom slide, the bottom of the connecting frame is connected to the auxiliary slide rails by a sliding block to form a guide connection, and a column is vertically arranged on the connecting frame; The first air guide device includes a first side slide vertically fixed to the side of the truss, the first side slide is driven by a first slide servo motor, a first air guide unit is arranged on the first side slide, the first air guide unit includes a first base fixedly connected to the first side slide, a first rotating cylinder is fixedly arranged on the first base, the first rotating cylinder is rotatably connected to the first air guide, and the first air guide is rotatably mounted on the first base through a bearing seat; The second air guide device includes a second side slide fixed on the column, the second side slide is driven by a second slide servo motor, a second air guide unit is arranged on the second side slide, the second air guide unit includes a second base fixedly connected to the second side slide, a second rotating cylinder is fixedly arranged on the second base, the second rotating cylinder is rotatably connected to the second air guide, the second air guide is rotatably mounted on the second base through a bearing seat, an air inlet is arranged on the second air guide, the air inlet is connected to a first interface of a three-way pipe, the second interface of the three-way pipe is connected to an air pressure monitor, and the third interface of the three-way pipe is connected to an external air source; A horizontal proximity switch is fixedly arranged at one end of the auxiliary slide rail, a first vertical proximity switch is fixedly arranged at one end of the first side slide, and a second vertical proximity switch is fixedly arranged at one end of the second side slide; The bellows fatigue life detection system also includes a controller, which is provided with an industrial control screen; the horizontal proximity switch, the first proximity switch, the second proximity switch, the air pressure monitor, the bottom slide servo motor, the first slide servo motor, the second slide servo motor, the first rotary cylinder and the second rotary cylinder are all connected to the controller through a circuit; The bottom slide servo motor is provided with a bottom encoder, the first slide servo motor is provided with a first encoder, and the second slide servo motor is provided with a second encoder. The bottom encoder, the first encoder and the second encoder are all connected to a controller through a circuit.

2. The bellows fatigue life detection system according to claim 1, characterized in that: The air pressure monitor is provided with an air pressure monitoring buzzer, the horizontal proximity switch is provided with a horizontal switch buzzer, the first proximity switch is provided with a first switch buzzer, and the second proximity switch is provided with a second switch buzzer.

3. A method for detecting fatigue life of a bellows, wherein the method for detecting fatigue life of a bellows uses the bellows fatigue life detection system according to any one of claims 1 to 2 to perform fatigue life detection on the bellows, characterized in that: The method for detecting the fatigue life of a bellows includes three detection modes, namely, a transverse mode, a longitudinal mode and a bidirectional mode. The specific steps of the method for detecting the fatigue life of a bellows are as follows: S1 Select the test mode and input parameters: select one mode from the transverse mode, longitudinal mode and bidirectional mode as the test mode, and test the fatigue life of the bellows in the test mode; Input the bellows diameter, length, target gas pressure and gas pressure threshold on the industrial control screen; Enter the moving frequency value, moving distance value and horizontal fatigue load value of the bottom slide in the test mode; Input the moving frequency value, moving distance value and vertical fatigue load value of the second side slide in the test mode; S2 adjusts the position: moves the bottom slide, the first side slide and the second side slide to the designated position in the test mode; S3 ventilation: one end of the bellows is fixedly connected to the first gas guide platform, and the other end of the bellows is fixedly connected to the second gas guide platform; the gas in the external gas source is introduced into the bellows through the three-way pipe, so that the gas pressure value of the metal bellows is the target gas pressure value; S4 detection: Start the control system, run the bellows life detection process in the test mode, and perform life detection on the bellows; S5 stop: The air pressure value in the bellows is monitored in real time through the air pressure sensor. When the air pressure value of the bellows drops to the set gas pressure threshold, the air pressure monitoring buzzer sounds an alarm, it is determined that the bellows is ruptured, and the detection ends.

4. The method for detecting fatigue life of a bellows according to claim 3, characterized in that: The specific steps for life testing of bellows in transverse mode are as follows: A1 Select the test mode and input parameters: Select the transverse mode as the test mode and test the fatigue life of the bellows in the transverse mode; Input the bellows diameter, length, target gas pressure and gas pressure threshold on the industrial control screen; Input the moving frequency value, moving distance value and horizontal fatigue load value of the bottom slide; Input the second side slide movement frequency as 0, movement distance as 0 and vertical fatigue as 0; A2 Adjust position: Move the bottom slide, the first side slide and the second side slide to the specified position in the horizontal mode; A3 ventilation: connect one end of the bellows to the first gas guide platform, and connect the other end of the bellows to the second gas guide platform; introduce the gas from the external gas source into the bellows through the three-way pipe, so that the gas pressure value of the metal bellows reaches the target gas pressure value; A4 detection: The controller controls the first rotating cylinder to drive the first air guide table to rotate, and the controller controls the second rotating cylinder to drive the second air guide table to rotate, so that the two ends of the bellows are at the same horizontal position; Within the movement distance of the bottom slide, the controller controls the bottom slide to reciprocate according to the movement frequency, and applies a horizontal fatigue load to the bellows; A5 Stop: The air pressure sensor monitors the air pressure value in the bellows in real time. When the air pressure value of the bellows drops to the set gas pressure threshold, the air pressure monitoring buzzer sounds an alarm, indicating that the bellows is ruptured and the detection ends.

5. The method for detecting fatigue life of a bellows according to claim 3, characterized in that: The specific steps for life testing of bellows in longitudinal mode are as follows; B1 Select the test mode and input parameters: Select the longitudinal mode as the test mode and test the fatigue life of the bellows in the longitudinal mode; Input the bellows diameter, length, target gas pressure and gas pressure threshold on the industrial control screen; Input the bottom slide's moving frequency as 0, moving distance as 0, and horizontal fatigue load as 0; Input the moving frequency value, moving distance value and vertical fatigue load value of the second side slide; B2 Adjust position: Move the bottom slide, the first side slide and the second side slide to the specified position in the portrait mode; B3 ventilation: connect one end of the bellows to the first gas guide platform, and connect the other end of the bellows to the second gas guide platform; introduce the gas from the external gas source into the bellows through the three-way pipe, so that the gas pressure value of the metal bellows reaches the target gas pressure value; B4 test: within the movement distance of the second side slide, the controller controls the second slide to reciprocate according to the movement frequency, and applies vertical fatigue load to the bellows; B5 Stop: The air pressure value in the bellows is monitored in real time through the air pressure sensor. When the air pressure value of the bellows drops to the set gas pressure threshold, the air pressure monitoring buzzer sounds an alarm, indicating that the bellows is ruptured and the detection ends.

6. The method for detecting fatigue life of a bellows according to claim 3, characterized in that: The specific steps for life testing of bellows in bidirectional mode are as follows; C1 Select the test mode and input parameters: Select the bidirectional mode as the test mode and test the fatigue life of the bellows in the bidirectional mode; Input the bellows diameter, length, target gas pressure and gas pressure threshold on the industrial control screen; Input the moving frequency value, moving distance value and horizontal fatigue load value of the bottom slide; Input the moving frequency value, moving distance value and vertical fatigue load value of the second side slide; C2 adjust position: move the bottom slide, the first side slide and the second side slide to the specified position in the bidirectional mode; C3 ventilation: connect one end of the bellows to the first gas guide platform, and connect the other end of the bellows to the second gas guide platform; introduce the gas from the external gas source into the bellows through the three-way pipe, so that the gas pressure value of the metal bellows reaches the target gas pressure value; C4 detection: The controller controls the first rotary cylinder to drive the first air guide table to rotate, and the controller controls the second rotary cylinder to drive the second air guide table to rotate, so that the two ports of the bellows are at the same horizontal position; Within the movement distance of the bottom slide, the controller controls the bottom slide to reciprocate according to the movement frequency, and applies a horizontal fatigue load to the bellows; at the same time, within the movement distance of the second side slide, the controller controls the second side slide to reciprocate according to the movement frequency, and applies a vertical fatigue load to the bellows; In the process of controlling the movement of the bottom slide and the second side slide, the controller controls the second rotary cylinder to rotate the second air guide table and controls the first rotary cylinder to rotate the first air guide table, so that the two ports of the bellows are always in a symmetrical state, and the port of the bellows connected to the second air guide table always points to the direction of the combined velocity vector of the movement direction of the bottom slide and the movement direction of the second side slide; C5 stop: The air pressure value in the bellows is monitored in real time through the air pressure sensor. When the air pressure value of the bellows drops to the set gas pressure threshold, the air pressure monitoring buzzer sounds an alarm, indicating that the bellows is ruptured and the detection ends.

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