阅读说明：本技术 快开门疲劳试验装置及方法 (Quick door opening fatigue test device and method ) 是由 赵番 司俊 朱旭晨 候少星 于 2021-08-20 设计创作，主要内容包括：本发明提供了一种快开门疲劳试验装置及方法,装置包括：步进电机,具有一驱动轴,驱动轴能够沿设定方向运动以抵接快开门的设定位置,并施加作用力；力传感模块,用于采集作用力的数据并输出一力信号；控制系统,包括相互连接的CPU模块、模拟量输入模块及位控模块,位控模块用于产生驱动步进电机的脉冲信号及转向信号,CPU模块用于确定脉冲数、脉冲频率及转向并发送给位控模块,模拟量输入模块与力传感模块连接以接收力信号,当力信号对应的作用力达到设定值时,模拟量输入模块通过CPU模块向位控模块发送信号,位控模块控制步进电机停止运行。本发明提供的快开门疲劳试验装置及方法能够对应力集中的部位进行疲劳试验,提高疲劳试验的可靠性。(The invention provides a quick door opening fatigue test device and a method, wherein the device comprises: the stepping motor is provided with a driving shaft which can move along a set direction to abut against a set position of the quick opening door and apply acting force; the force sensing module is used for acquiring data of acting force and outputting a force signal; the control system comprises a CPU module, an analog input module and a position control module which are connected with each other, wherein the position control module is used for generating pulse signals and steering signals for driving the stepping motor, the CPU module is used for determining pulse numbers, pulse frequencies and steering and sending the pulse numbers, the pulse frequencies and the steering signals to the position control module, the analog input module is connected with the force sensing module to receive force signals, when acting force corresponding to the force signals reaches a set value, the analog input module sends signals to the position control module through the CPU module, and the position control module controls the stepping motor to stop running. The quick door opening fatigue test device and the method provided by the invention can be used for carrying out fatigue test on the part with concentrated stress, and the reliability of the fatigue test is improved.)

1. The utility model provides a fatigue test device opens door soon for the fatigue performance of opening the door soon to open door pressure vessel tests, its characterized in that includes:

the stepping motor is provided with a driving shaft, and the driving shaft can move along a set direction to abut against a set position of the quick-opening door and apply acting force to the set position;

the force sensing module is arranged at the far end of the driving shaft and is used for acquiring the acting force data and outputting a force signal;

the control system comprises a CPU module, an analog input module and a position control module which are connected with each other, wherein the position control module is used for generating a pulse signal and a steering signal for driving the stepping motor, the CPU module is used for determining the pulse number and the pulse frequency of the pulse signal and the steering of the stepping motor and sending the pulse number and the pulse frequency to the position control module, the analog input module is connected with the force sensing module to receive the force signal, when the acting force corresponding to the force signal reaches a set value, the analog input module sends a signal to the position control module through the CPU module, and the position control module controls the stepping motor to stop running.

2. The fatigue testing device for the quick opening door as claimed in claim 1, further comprising a motor driver, wherein the position control module is connected to the stepping motor through the motor driver, and the motor driver is configured to amplify the pulse signal and the steering signal generated by the position control module to drive the stepping motor, so as to drive the driving shaft to move along the set direction.

3. The quick-opening fatigue testing device of claim 2, further comprising a first power module and a second power module, wherein the first power module is configured to supply power to the control system, and the second power module is configured to supply power to the motor driver.

4. The quick-opening door fatigue test device of claim 1, wherein the control system further comprises a signal amplification module, and the signal amplification module is connected with the force sensing module and the analog input module, so as to amplify the force signal sent by the force sensing module and send the amplified force signal to the analog input module.

5. The quick-opening fatigue testing device of claim 1, wherein the CPU module further comprises a delay unit, and when the acting force reaches the set value, the delay unit sends a signal to the position control module, and the position control module controls the stepping motor to stop operating for a set time.

6. The quick door opening fatigue test device according to claim 1, further comprising a human-computer interaction module connected to the CPU module, wherein the human-computer interaction module is configured to input the set value and send the set value to the CPU module, the CPU module converts the set value into the pulse number and the pulse frequency of the pulse signal and sends the pulse number and the pulse frequency to the position control module, and the CPU module converts the force signal into data and feeds the data back to the human-computer interaction module.

7. The quick-opening door fatigue test device of claim 1, further comprising a table for securing the quick-opening door.

8. The quick-opening door fatigue test device as claimed in claim 7, wherein a start button and a stop button connected with the CPU module are arranged on the workbench, and the start button and the stop button are used for sending commands to the CPU module to control the start and stop of the quick-opening door fatigue test.

9. The quick open door fatigue test apparatus of claim 1, wherein the set position is a stress concentration portion of the quick open door.

10. A quick-opening fatigue test method is used for testing the fatigue performance of a quick-opening door of a quick-opening pressure container, and is characterized by comprising the following steps:

s1, setting the rotation direction and speed of a stepping motor, enabling a driving shaft of the stepping motor to move along a set direction, and when the driving shaft abuts against the set position of the quick opening door, reducing the speed of the driving shaft, enabling the driving shaft to continue to move along the set direction and impacting the quick opening door;

s2, collecting acting force of the driving shaft on the quick opening door through a force sensing module, comparing the acting force with a set value, and controlling the stepping motor to stop running when the acting force reaches the set value;

s3, setting the rotation direction and speed of the stepping motor after setting time, returning the driving shaft along the original path in the direction away from the quick opening door, and collecting the deformation amount at the set position;

and S4, repeating the steps S1-S3, and evaluating the fatigue performance of the quick-opening door according to the deformation amount at the set position.

Technical Field

The invention relates to the technical field of quick-opening pressure containers, in particular to a quick-opening fatigue test device and method.

Background

The quick-opening pressure container refers to a pressure container which can be opened and closed by rotating a cover by a certain angle or moving a locking piece for a certain distance. Because the fastening bolts do not need to be screwed or loosened one by one, the opening and closing time of the quick-opening pressure container is very short, and the material loading and unloading are very convenient, so the quick-opening pressure container is widely applied to frequent intermittent operation occasions. Such as hospital and laboratory sterilizers, hyperbaric oxygen chambers; still kettle for silicate product in building material industry; vulcanizing tanks for rubber products in the chemical industry; sterilizing cans and food autoclaves for canned products in the food industry; wood retort and sleeper corrosion prevention tanks in the building material industry; dyeing machines, cooking pots, etc. in the textile industry.

With the development of science and technology, higher requirements are also put forward on the quick-opening pressure container. Because the quick-opening pressure vessel can bear the alternating load action of periodic variation in the use process, alternating stress concentration is generated, and fatigue cracks are easy to occur at the stress concentration part to cause fatigue failure, thereby causing the leakage of the pressure vessel. Therefore, the method has important significance for evaluating the fatigue performance of the quick-opening door.

In the past, the service life of the quick-opening door is calculated by adopting a method of manual cyclic pressurization in a pressure container, the operation difficulty is high, the effective fatigue test cannot be accurately carried out on the part with concentrated stress, and the application value of the evaluation result is not high.

Disclosure of Invention

The invention aims to provide a quick-opening fatigue test device and a method, which can quickly, simply and accurately perform a fatigue test on a part with concentrated stress on a quick-opening door and improve the precision and reliability of the fatigue test.

In order to achieve the above object, according to one aspect of the present invention, there is provided a quick-opening fatigue testing apparatus for testing fatigue performance of a quick-opening door of a quick-opening pressure vessel, including:

the stepping motor is provided with a driving shaft, and the driving shaft can move along a set direction to abut against a set position of the quick-opening door and apply acting force to the set position;

the force sensing module is arranged at the far end of the driving shaft and is used for acquiring the acting force data and outputting a force signal;

the control system comprises a CPU module, an analog input module and a position control module which are connected with each other, wherein the position control module is used for generating a pulse signal and a steering signal for driving the stepping motor, the CPU module is used for determining the pulse number and the pulse frequency of the pulse signal and the steering of the stepping motor and sending the pulse number and the pulse frequency to the position control module, the analog input module is connected with the force sensing module to receive the force signal, when the acting force corresponding to the force signal reaches a set value, the analog input module sends a signal to the position control module through the CPU module, and the position control module controls the stepping motor to stop running.

Optionally, the fatigue test device for quickly opening the door further comprises a motor driver, the position control module is connected with the stepping motor through the motor driver, and the motor driver is used for amplifying a pulse signal and a steering signal generated by the position control module to drive the stepping motor, so as to drive the driving shaft to move along the set direction.

Optionally, the fatigue test device for quickly opening the door further comprises a first power module and a second power module, the first power module is used for supplying power to the control system, and the second power module is used for supplying power to the motor driver.

Optionally, the control system further includes a signal amplification module, where the signal amplification module is connected to the force sensing module and the analog input module, so as to amplify the force signal sent by the force sensing module and send the amplified force signal to the analog input module.

Optionally, the CPU module further includes a delay unit, and when the acting force reaches the set value, the delay unit sends a signal to the position control module, and the position control module controls the stepping motor to stop running for the set time.

Optionally, the fatigue test device for quickly opening the door further comprises a human-computer interaction module connected with the CPU module, the human-computer interaction module is configured to input the set value and send the set value to the CPU module, the CPU module converts the set value into the pulse number and the pulse frequency of the pulse signal and sends the pulse number and the pulse frequency to the position control module, and the CPU module converts the force signal into data and feeds the data back to the human-computer interaction module.

Optionally, the fatigue test device for the quick-opening door further comprises a workbench, and the workbench is used for fixing the quick-opening door.

Optionally, a start button and a stop button connected to the CPU module are provided on the workbench, and the start button and the stop button are used to send commands to the CPU module to control the start and stop of the quick-opening door fatigue test.

Optionally, the set position is a stress concentration position of the quick-opening door.

As another aspect of the present invention, the present invention provides a fatigue test method for a quick-opening door, which is used for testing fatigue performance of a quick-opening door of a quick-opening pressure container, and comprises the following steps:

s1, setting the rotation direction and speed of a stepping motor, enabling a driving shaft of the stepping motor to move along a set direction, and when the driving shaft abuts against the set position of the quick opening door, reducing the speed of the driving shaft, enabling the driving shaft to continue to move along the set direction and impacting the quick opening door;

s2, collecting acting force of the driving shaft on the quick opening door through a force sensing module, comparing the acting force with a set value, and controlling the stepping motor to stop running when the acting force reaches the set value;

s3, setting the rotation direction and speed of the stepping motor after setting time, returning the driving shaft along the original path in the direction away from the quick opening door, and collecting the deformation amount at the set position;

and S4, repeating the steps S1-S3, and evaluating the fatigue performance of the quick-opening door according to the deformation amount at the set position.

The invention provides a quick-opening door fatigue test device and a method, wherein the movement of a driving shaft is controlled by a CPU (Central processing Unit) module and a position control module, a force sensing module feeds back the acting force of the driving shaft on a quick-opening door, an analog quantity input module compares the acting force with a set value and performs self-adaptive adjustment by the CPU module to form closed-loop control of the acting force, when the acting force reaches the set value, the position control module controls a stepping motor to stop running, so that the driving shaft keeps the acting force on the quick-opening door within set time, and then the fatigue performance of the quick-opening door can be effectively tested and evaluated according to the deformation quantity at the set position of the quick-opening door. The whole device is simple in structure, can quickly, conveniently and accurately carry out fatigue test on the part with concentrated stress, and improves the precision and reliability of the fatigue test.

Drawings

It will be appreciated by those skilled in the art that the drawings are provided for a better understanding of the invention and do not constitute any limitation to the scope of the invention. Wherein:

fig. 1 is a schematic view of a quick-opening fatigue testing apparatus provided in an embodiment of the present invention;

fig. 2 is a control block diagram of a quick door opening fatigue test apparatus provided in an embodiment of the present invention;

FIG. 3 is a flowchart of a method for testing fatigue of a quick-opening door according to an embodiment of the present invention;

in the drawings:

1-quick opening the door; 2-a step motor; 3-a drive shaft; 4-a force sensing module; 5-a CPU module; 6-analog input module; 7-a bit control module; 8-a motor driver; 9-a first power supply module; 10-a second power supply module; 11-a signal amplification module; 12-an industrial personal computer; 13-a display; 14-a workbench; 15-start button; 16-stop button.

Detailed Description

To further clarify the objects, advantages and features of the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It is to be noted that the drawings are in greatly simplified form and are not to scale, but are merely intended to facilitate and clarify the explanation of the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.

As used in this application, the singular forms "a," "an," and "the" include plural referents unless the content clearly dictates otherwise. As used in this disclosure, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise. As used in this disclosure, the term "plurality" is generally employed in its sense including "at least one" unless the content clearly dictates otherwise. As used in this disclosure, the term "at least two" is generally employed in a sense including "two or more" unless the content clearly dictates otherwise. Furthermore, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or at least two of the features.

Referring to fig. 1-2, fig. 1 is a schematic diagram of a quick-opening fatigue testing apparatus according to an embodiment of the present invention, and fig. 2 is a control block diagram of the quick-opening fatigue testing apparatus according to the embodiment of the present invention. The embodiment provides a fatigue test device opens door soon for the fatigue performance to 1 that opens door soon of quick-opening door pressure vessel tests, includes:

a stepping motor 2 having a driving shaft 3, the driving shaft 3 being movable in a set direction to abut against a set position of the quick-opening door 1 and apply an acting force to the set position;

the force sensing module 4 is arranged at the far end of the driving shaft 3, and the force sensing module 4 is used for acquiring the acting force data and outputting a force signal;

the control system comprises a CPU (Central processing Unit) module 5, an analog input module 6 and a position control module 7 which are connected with each other, wherein the position control module 7 is used for generating pulse signals and steering signals for driving the stepping motor 2, the CPU module 5 is used for determining the pulse number and the pulse frequency of the pulse signals and the steering of the stepping motor 2 and sending the pulse signals to the position control module 7, the analog input module 6 is connected with the force sensing module 4 to receive the force signals, when the acting force corresponding to the force signals reaches a set value, the analog input module 6 sends signals to the position control module 7 through the CPU module 5, and the position control module 7 controls the stepping motor 2 to stop running.

The motion of a driving shaft 3 is controlled through a CPU (Central processing Unit) module 5 and a position control module 7, a force sensing module 4 feeds back the acting force of the driving shaft 3 on the quick-opening door 1, an analog quantity input module 6 compares the fed-back acting force with a preset value which is input in advance and performs self-adaptive adjustment through the CPU module 5, closed-loop control of the acting force is formed, when the acting force reaches the preset value, the position control module 7 controls the stepping motor 2 to stop running, so that the driving shaft 3 keeps the acting force on the quick-opening door 1 within the set time, and then the fatigue performance of the quick-opening door 1 can be effectively tested and evaluated according to the deformation quantity of the set position of the quick-opening door 1.

It should be understood that references to "connected" in this application are not mechanical connections, but rather communication connections, including wired and wireless communication connections.

Specifically, the quick-opening door 1 is a quick-opening rotary cover of the quick-opening pressure container, and opening and closing of the pressure container can be completed by rotating the cover by a certain angle or moving the locking piece by a certain distance. The quick-opening pressure vessel can bear the alternating load action of periodic change in the use process of the quick-opening pressure vessel, alternating stress concentration is generated, and fatigue cracks are easy to occur at the stress concentration part and cause fatigue failure, so that the pressure vessel is leaked. Therefore, in this embodiment, the set position is a stress concentration portion of the quick-opening door 1. The stress concentration portion can be determined according to the deformation amount, cracks, and the like at each position of the quick-opening door 1 in the actual use process, and is generally the edge portion of the quick-opening door 1.

With reference to fig. 1, the fatigue test apparatus further includes a motor driver 8, the position control module 7 is connected to the stepping motor 2 through the motor driver 8, and the motor driver 8 is configured to amplify the pulse signal and the steering signal generated by the position control module 7 to drive the stepping motor 2, so as to drive the driving shaft 3 to move along the set direction.

In this embodiment, the 87H4C series of hatton, chang, is used as the stepper motor 2, which is a linear stepper motor with the highest power of hatton, and can provide up to 500 pounds (227kg) of force, and the through-shaft output is used, and the driving shaft 3 penetrates through the motor to perform linear motion. The stepping motor 2 is used as a motion control actuating mechanism of the quick door opening fatigue test device, and adjusts the motion speed and the displacement of the driving shaft 3 by receiving the change of input pulse frequency and pulse number. The rotating speed of the stepping motor 2 is in direct proportion to the pulse frequency of the pulse signal, the driving shaft 3 can be precisely regulated by controlling the pulse frequency, and the driving shaft 3 can be precisely positioned by controlling the number of pulses. Of course, the stepping motor 2 may also be a fixed shaft type or an external driving type stepping motor, and the application is not limited thereto.

In this embodiment, the DCM8055 is selected as the motor driver 8. The DCM8055 driver is a high-performance subdivision chopping driver, is small in size, suitable for application occasions with small space, convenient to integrate with other electric elements and suitable for a two-phase stepping motor with large output current of 5/2.8A. The DCM8055 driver has higher output power and higher speed compared with the L/R driver of the traditional technology due to the use of the advanced bipolar direct current chopping technology and the high-performance subdivision technology.

Preferably, when the driving shaft 3 does not contact the quick-opening door 1 (i.e. during idle stroke), the frequency of the pulse signal is increased to make the driving shaft 3 move at a faster speed, and when the driving shaft 3 abuts against the quick-opening door 1, the frequency of the pulse signal is decreased to make the driving shaft 3 impact the quick-opening door 1 at a slower speed, so as to prevent overload caused by too fast impact. The larger the displacement of the driving shaft 3 is, the larger the acting force on the set position is, and the larger the deformation amount caused by the acting force is, so that when the acting force corresponding to the force signal sent by the force sensing module 4 reaches the set value, the position control module 7 controls the stepping motor 2 to stop running to keep the acting force of the driving shaft 3 on the set position, so as to better simulate the situation that the stress concentration part of the quick-opening door 1 is damaged by fatigue, and improve the precision and reliability of a fatigue test.

Further, the fatigue test device of opening door soon still includes first power module 9 and second power module 10, first power module 9 is used for giving control system supplies power, second power module 10 is used for giving motor driver 8 supplies power.

In this embodiment, the first power module 9 may adopt a switching power supply with 24V output and 150W output, and is mainly used for supplying power to the control system. The second power module 10 may adopt a switching power supply with output of 48V and 350W for supplying power to the motor driver 8, so as to ensure sufficient power output of the stepping motor 2.

With reference to fig. 1-2, the fatigue testing apparatus for quick opening door includes a force sensing module 4 disposed at a distal end of the driving shaft 3, wherein the force sensing module 4 is configured to collect data of the acting force and output a force signal.

In this embodiment, the force sensing module 4 selects a WMC-250 force sensor of the Inteface company, and a signal of the WMC-250 force sensor is output at ± 20 mV. The WMC-250 force sensor is fixed on a driving shaft 3 of a stepping motor 2 and used for collecting the acting force data and outputting a force signal to the analog quantity input module 6, and when the driving shaft 3 moves continuously, the force signal is a changed electric signal.

Preferably, the control system further includes a signal amplification module 11, and the signal amplification module 11 is connected to the force sensing module 4 and the analog input module 6, so as to amplify the force signal sent by the force sensing module 4 and send the amplified force signal to the analog input module 6.

In this embodiment, the signal amplification module 11 selects a Model 500 amplifier of the Inteface company, and amplifies the force signal through the Model 500 amplifier, so as to amplify the weak ± 20mV output of the force sensing module 4 into a voltage signal of ± 10V, and send the voltage signal to the analog input module 6.

Referring to fig. 1-2, the control system includes a CPU module 5, an analog input module 6, and a position control module 7, which are connected to each other, where the position control module 7 is configured to generate a pulse signal and a steering signal for driving the stepping motor 2, the CPU module 5 is configured to determine a pulse number and a pulse frequency of the pulse signal and a steering direction of the stepping motor 2 and send the pulse number and the pulse frequency to the position control module 7, the analog input module 6 is connected to the force sensing module 4 to receive the force signal, when an acting force corresponding to the force signal reaches a set value, the analog input module 6 sends a signal to the position control module 7 through the CPU module 5, and the position control module 7 controls the stepping motor 2 to stop operating.

In this embodiment, the control system is a PLC, a PLC programmer and configuration software are used to control different test requirements, and the speed and displacement of the driving shaft 3 can be controlled by writing parameters such as the rotation direction, the number of pulses, and the pulse frequency of the stepping motor 2.

The CPU module 5 is used as a main control unit of the control system, and selects a CPU 221 of an S7-200PLC series with a digital quantity input point of 6 points and a digital quantity output point of 4 points.

The analog input module 6 selects EM 231, and the input range is selected to be 0-10V.

The position control module 7 adopts EM 253. The EM253 position control module is a special function module of the S7-200PLC, which can generate a pulse train for controlling the speed and displacement of the stepping motor 2.

In this embodiment, the analog input module 6 and the bit control module 7 communicate with the CPU module 5 through extended I/O bus communication, and the bit control module 7 has 8 digital inputs and serves as an intelligent module in an I/O configuration.

Preferably, the CPU module 5 further includes a delay unit, and when the acting force reaches the set value, the delay unit sends a signal to the position control module 7, and the position control module 7 controls the stepping motor 2 to stop operating for a set time, so as to maintain the acting force of the driving shaft 3 on the set position, so as to better simulate a fatigue failure condition of a stress concentration portion of the quick-opening door 1, and improve the precision and reliability of the test.

With reference to fig. 1-2, the fatigue test device for quick door opening further includes a human-computer interaction module connected to the CPU module 5, the human-computer interaction module is configured to input the set value and send the set value to the CPU module 5, the CPU module 5 converts the set value into the pulse number and the pulse frequency of the pulse signal and sends the pulse number and the pulse frequency to the position control module 7 after a series of engineering operations, and the CPU module 5 converts the force signal into data and feeds the data back to the human-computer interaction module.

In this embodiment, the human-computer interaction module includes an industrial personal computer 12 and a display 13, the industrial personal computer 12 is a porphyry IPC-611 industrial personal computer, and the industrial personal computer is a compact slot rack type chassis, has a depth of 348mm, and supports an ATX mainboard.

The display 13 adopts a 22-inch liquid crystal display and is used for providing a clear and friendly human-computer interface and vividly reflecting real-time data in the test.

In the fatigue test process, parameters such as the displacement, the speed and the test times of the driving shaft 3 need to be set frequently, so that the man-machine interaction module can be used as an upper computer and the control system can be used as a lower computer for the convenience of field personnel operation.

The main functions of the upper computer are as follows:

1) the data management function: the real-time dynamic graph of the acting force in the quick door opening fatigue test is generated, a clear and friendly human-computer interface is provided for management personnel, the real-time data of the force sensor is vividly and vividly reflected, and the storage, the display and the query of the alarm, the historical data and the historical trend curve are completed. And generating various test reports which can be printed at regular time by a printer.

2) And (4) control functions: i.e. real-time control in a controlled manner based on graphical and chinese buttons. The tester can start and stop the field controlled equipment (such as the stepping motor 2) through a mouse or a keyboard of the computer. When the computer changes the control mode into automatic control, the control system can automatically complete the start/stop control of the equipment according to respective test parameters and equipment working conditions.

3) Data storage function: i.e. the data monitored by the system can all invoke queries. The data functions mainly comprise a real-time database, a historical database and a dump backup.

The main functions of the lower computer are as follows:

1) the data acquisition function: by using the characteristics of the computer, test data such as the rotating speed, the pressure and the like of each test link, each time interval in the test process, the operating condition of test equipment and the like are automatically and continuously detected and recorded and displayed.

2) The automatic protection function: the PLC and the monitoring computer can automatically and continuously monitor data and the running condition of the test equipment, carry out comprehensive analysis, judge possible accidents in the test process, complete automatic alarm and actively take accident preprocessing measures, prevent accidents from occurring and expanding, and achieve the purposes of protecting personal safety and equipment safety and the like.

3) Automatic operation and regulation functions: and under the state that the test bed is automatically controlled, the equipment is automatically started and stopped, the equipment is automatically switched on and off, and the running state of the stepping motor 2 is adjusted according to the specified time period, the set logic sequence and the set test parameters according to the test parameters, the equipment working condition and the control requirements.

With reference to fig. 1, the fatigue test device for a quick-opening door further includes a workbench 14, and the workbench 14 is used for fixing the quick-opening door 1. Of course, the present application does not limit the fixing manner of the quick-opening door 1, and for example, the quick-opening door 1 may be fixed by a clamp.

Further, a start button 15 and a stop button 16 connected to the CPU module 5 are disposed on the workbench 14, and the start button 15 and the stop button 16 are used for sending commands to the CPU module 5 to control the start and stop of the quick-opening fatigue test.

In this embodiment, Schneider is adopted as the start button 15The green flat headed light button XB4BW33B5 with a 24V LED indicator light, 1 normally open and 1 normally closed contact. The stop button 13 adopts SchwannDe ErThe red flat headed lamp button XB4BW34B5 with a 24V LED indicator light, 1 normally open and 1 normally closed contact.

In addition, referring to fig. 3 in combination with fig. 1-2, the present invention further provides a quick door opening fatigue test method, which can use the quick door opening fatigue test apparatus described above to test the fatigue performance of the quick door 1 of the quick door opening pressure vessel, and the quick door opening fatigue test method includes the following steps:

s1, setting the rotation direction and speed of the stepping motor 2, enabling the driving shaft 3 of the stepping motor 2 to move along a set direction, and when the driving shaft 3 abuts against the set position of the quick-opening door 1, reducing the speed of the driving shaft 3, and enabling the driving shaft 3 to continue to move along the set direction and impact the quick-opening door 1;

s2, collecting the acting force of the driving shaft 3 on the quick-opening door 1 through a force sensing module 4, comparing the acting force with a set value, and controlling the stepping motor 2 to stop running when the acting force reaches the set value;

s3, setting the rotation direction and speed of the stepping motor 2 after setting time, returning the driving shaft 3 along the original path in the direction away from the quick-opening door 1, and collecting the deformation amount at the set position;

and S4, circulating the steps S1-S3, and evaluating the fatigue performance of the quick-opening door 1 according to the deformation amount at the set position.

Specifically, step S1 is executed first, the steering (e.g., forward rotation) and the setting value of the stepping motor 2 are input through the human-computer interaction module and sent to the CPU module 5, the CPU module 5 converts the setting value into the pulse number and the pulse frequency of the pulse signal and sends the pulse number and the pulse frequency to the position control module 7, and the position control module 7 controls the operation of the stepping motor 2. And then, the idle stroke of the stepping motor 2 is calculated in advance, and after the idle stroke is reached, the speed of the driving shaft 3 is reduced, so that the driving shaft 3 impacts the quick-opening door 1 at a lower speed.

And then, executing a step S2, acquiring an acting force of the driving shaft 3 on the quick-opening door 1 through a force sensing module 4, and sending a force signal to an analog input module 6, wherein when the acting force corresponding to the force signal reaches a set value, the analog input module 6 sends a signal to a position control module 7 through the CPU module 5, and the position control module 7 controls the stepping motor 2 to stop running.

And step S3 is executed, the delay time is controlled by the delay unit, after the time is set, the rotation direction (for example, reverse rotation) and the set value of the stepping motor 2 are input by the man-machine interaction module again, so that the driving shaft 3 returns along the original path in the direction away from the quick-opening door 1, and at this time, the deformation amount at the set position can be acquired.

And finally, executing the step S4, and circulating the steps S1-S3, and after a plurality of tests, evaluating the fatigue performance of the quick-opening door 1 according to the deformation of the set position.

In summary, the embodiment of the invention provides a fatigue test device and a method for a quick-opening door, wherein a CPU module and a position control module are used for controlling the motion of a driving shaft, a force sensing module feeds back the acting force of the driving shaft on the quick-opening door, an analog input module compares the acting force with a set value and performs self-adaptive adjustment through the CPU module to form closed-loop control of the acting force, when the acting force reaches the set value, the position control module controls a stepping motor to stop running, so that the driving shaft keeps the acting force on the quick-opening door within a set time, and then the fatigue performance of the quick-opening door can be effectively tested and evaluated according to the deformation quantity at the set position of the quick-opening door. The whole device is simple in structure, can quickly, conveniently and accurately carry out fatigue test on the stress-concentrated part on the quick-opening door, and improves the precision and reliability of the fatigue test.

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any way. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.