Design of steel drum dangerous goods packaging drop test machine Dai Fengqing Wang Jinliang Liu Qing Wang Chunming Zhang Feng Tianjin Luhai Petroleum Equipment System Engineering Co., Ltd. Abstract: The drop tester is a device that verifies the product's ability to withstand shock and drop. At present, the working mode of the test machine can be divided into two categories: bracket type and suspension type. However, due to the design limitation of the testing machine and the shape and size of the sample and the state of the suspension, the weight of the sample has certain limitations, and the measurement of the drop height is inconvenient and may also present a safety hazard. The study introduced programmable controllers, computers, force sensors, and displacement sensor measurement techniques to analyze real-time test data of weight and displacement during lifting (drop) and anvil surface separation (contact) by software. The system intelligently judges the starting point of the drop height and accurately realizes the identification and positioning of the drop height. It solves the problem of drop height measurement and drop height setting for the various drop packages (such as: container bags, barrels and boxes). Keywords: large dangerous goods package drop test machine PLC touch screen 0 Preface The drop test is the most common test method to verify the impact resistance of the package during circulation. The performance and mode of the drop tester determine the accuracy and convenience of the test. At present, the drop test equipment below 300 kg There are dedicated, shaped products and equipment. However, it is still blank to test the dangerous goods packaging drop test equipment with a large weight (more than 300 kg). In addition, the existing drop test for more than 300 kg only has a release device for hanging the test sample, has no complete equipment, and requires manual measurement for the drop height during use, is inconvenient to operate, and has an unsafe factor. Using the current advanced computer technology and measurement and control technology, the large-scale dangerous goods transport packaging drop test machine has completed the hanging/dropping of the transport package with the weight of the package test sample from 100Kg to 2 tons, and the automatic measurement of the drop height of the experiment. The automatic setting of the drop height avoids the possibility of accidental injury to the human body when measuring the drop height; the diversification of the test method is also one of the highlights of this test machine design. This design not only satisfies the needs of China's domestic and export dangerous goods packaging inspection, but also fills the product blank of large dangerous goods package drop test equipment. 1, the system hardware design The main part of the large dangerous goods packaging drop test machine is the lifting frame structure, which is the necessary guarantee for the safe, stable and precise operation of the drop test machine. The main frame adopts a gantry structure, the release device is mounted on the movable beam, and the two servo-controlled motors provide power to control and lift the movable beam. The sliding guides are installed on both sides to make the lifting device run smoothly, and the drop test is guaranteed from the mechanical structure. Machine safety, smoothness and control accuracy. The supporting columns and fixed beams of the large dangerous goods packaging drop test machine are made of I-beam as raw materials to ensure the safety and stability of the whole equipment. The support column and the fixed beam are bolted to facilitate transportation and installation after the equipment is processed. Considering the large weight test piece requires a certain width and height requirements, the special test machine has a net span of ≥3 m, and the distance between the fixed beam and the anvil surface is ≥3.8 m. â—The sliding guide is composed of a guide rail and a slider. The guide rail is fixed on the inner side of the I-beam support column, and the slider is connected with the movable beam to ensure the smooth running of the movable beam. â— The movable beam is designed as a shape-shaped groove structure (as shown in Fig. 3), and the measurement and control part is installed in the groove beam. This is because the measurement and control components of the servo motor, servo controller, release device, etc. are all on the movable beam, and the measurement control part including the PLC is installed in the groove of the movable beam to reduce the external connection. To make the structure more compact. 2) Release device The large-scale dangerous goods packaging drop test machine can correctly and accurately complete the drop test, and the release device is the most critical part. (As shown in Figure 4). The release device is mainly composed of a casing, a hook, a locking lever, an electric pin, a sensor and the like. Rotate the electric pin when released, the lock lever is unlocked, and the hook is rotated to release. When the test piece needs to be hoisted, the test piece lifting ring is sleeved on the hook, and the locking device is automatically locked after the hook is pushed into position by hand. The position of the electric pin and the lock lever is measured by the sensor, and the measurement and control system automatically performs the release, lock and reset actions. 2 PLC control system The large dangerous goods drop test machine mainly controls the movement of the movable beam and drives the movement of the test piece in the vertical direction. The servo controller controls the rotation of the motor to drive the overall movement of the movable beam. The load cell and fiber sensor in the test are important parts of the zero point setting and release device locking, respectively. The schematic diagram of the entire measurement and control system is as follows: 2.1 Software Design The software control of the entire device is mainly done by using logic controller, servo controller, sensor and touch screen. The operation command is sent through the touch screen, and the logic controller controls the servo motor and the servo controller, and cooperates with the sensor to complete the entire test. The control of the entire drop tester is a closed loop system. The main control object of the control system is the object to be tested, and the height and weight of the object to be tested are controlled. The controlled object of the system is the speed and forward and reverse of the motor, and the actuator is a servo controller. All the controls are relatively complicated. In the whole program design, full use of PLC programming allows the convenience of using subprograms, adopts structured programming ideas, and different lifting methods, zero calibration of the object to be tested, release hook control, automatic hand switching, etc. program. The whole loop is a sequence of actions, as long as each action is executed in turn to complete the actions required automatically. Each specific operation is completed by calling the corresponding subroutine to avoid the problem of mechanical repetition of the program. The main block diagram is shown below: From the figure you can see the subroutine designed by this project, as shown below (Table 1) Program implementation function Initialize manual switching mode one way two release Parameter initialization work, including height and weight initialization, hand automatic state initialization. 2.2 The key technology of the test machine The development of the large-scale dangerous goods drop test machine summarizes the advantages of the previous test machine, and also adds some new controls and technologies. The main differences are: â—Automatic determination of test height In the past, the test height of this drop mode drop test was manually measured. For the angular drop test and the welding drop test of the barrel container, it is necessary to measure the height in advance and set the state of the drop. It is neither convenient nor safe to fall during the test. The large dangerous goods packaging drop test machine developed by the project can realize the automatic identification and preset of the test height and solve the preset problem of the drop state. â— release device In the past, the drop test device mainly used a support plate for supporting the test piece, such as a rotary wing type, a flap type, and the like. Why this type of Middle East is not suitable for the drop test of test samples above 300Kg, there are certain limitations on the weight of the test sample. The large-scale dangerous goods packaging drop test machine uses a suspended hook-type release device to solve the drop test problem of large and heavy test samples. The use of light sensor control and motor drive release enables automatic locking of the test sample and automatic release at the operator's command. â—Measurement accuracy The previous drop test equipment is only suitable for the test piece weight is generally less than 300Kg, not suitable for some large dangerous goods test. The large-scale dangerous goods packaging drop test machine adopts a door type frame structure, and the two ends are respectively driven by a servo motor, and the horizontal movement of the movable beam is ensured under the action of the screw screw and the guide rail. With a test weight of more than 2 tons, the force sensor, guide rail and lead screw in the test machine ensure the accuracy of the height measurement during the test. â—Advanced control system The control system of the package drop tester uses a programmable controller and a tablet computer. The industrial control was first introduced into the testing machine. Through the intelligent control of the sensor and PLC, the automatic judgment of the test piece lifting process was realized and the height was automatically raised to the preset height. The use of a tablet computer improves the reliable operation and practicality of the test machine. 3 Touch screen monitoring software development 3.1 Overall design The control system monitoring software uses a Kunlun vertical and horizontal 15? touch screen to connect the PLC control system for on-site control with the host computer monitoring system. Secondly, starting from the definition of variables and the management of I/O devices, the use of configuration software diversified drawing tools, powerful footstep language processing capabilities and rich command language functions to develop the birth, friendly main monitoring interface, and cover alarm Full-featured sub-monitoring interface for system, parameter setting, and operation control. The developed monitoring system performs real-time on-site execution simulation and monitoring of the structure, real-time alarm query and processing functions. In the operation, the release function adopts multiple prompt confirmation methods to prevent non-operator's wrong operation to ensure safety. The overall design block diagram of the monitoring software is as follows: 3.2 Test monitoring interface design As the main part of the whole monitoring software, the design of the running interface visually reflects the whole system testing process, and can reflect various states and parameter values ​​in real time according to the actions of the operators. The operator can not only switch between manual and automatic, but also select the test mode of operation according to the requirements of the test. In the test, it is convenient to preset the lifting height of the test. For the software operation which may cause operational danger, the monitoring interface adopts multiple confirmation methods to improve the safety of the test. The running interface is as shown: 3.3 parameter setting and alarm interface design In order to facilitate the automation of the system and improve the range of use of the testing machine, the parameter setting is added to the monitoring interface. The speed of the rise and fall of the test piece is changed by changing the motor speed, and the setting of the change coefficient is expanded for different test pieces. The use of the test machine saves money and improves the accuracy of the test. 4 Conclusion The design of the large dangerous goods packaging drop test machine introduced industrial control technology into the packaging industry, which not only improved the accuracy and convenience of the previous test machine, but also greatly improved the testing of the packaging industry. . references [1] Design of packaging drop test: Ling meritorious, Zhao Shu Kam "Machine Tool & Hydraulics" 1999-4 national unity ISSN: CN44-1259 / TH [2] drop test and impact of large sets of load: in the rule would "monitor the instrumentation and analysis" 1999-2 ISSN: 1002-3720 [3] the latest developments of the drop test and impact test device package: Liu Xuejiao "Chinese Mechanical Engineering Society Institute of Packaging and Food Machinery Proceedings of the First Annual" 1989 CLC: TS206 (Article source: Shanghai Packaging, 1996, Issue 2) Packaging Tube,Portable Packaging Tube,Portable Test Tube,Pre Roll Tubes NANTONG OUFEIYA IMP& EXP CO.,LTD , https://www.zjnantongoufeiya.com
The switching of several operational controls in the manual state includes: rising, falling, zeroing, zeroing, and the like.
In the automatic state, the test piece judges the zero point from the angle of weight reduction and automatically rises to the preset height.
In the automatic state, the test piece judges the zero point from the angle of weight gain and automatically rises to the preset height.
The lock lever automatically comes off and the hook releases heavy objects.
At the same time, according to the design requirements of the design, the maximum height of the test machine is 3.8 meters, the maximum load is 2.5 tons, hardware failures, etc., exceed the above indicators in the test, requiring the monitoring system to make timely and effective Call the police. In view of this, when developing the alarm system, the design first establishes the alarm comment of the system, and the detailed information of the alarm can be obtained in time and accurately in the operation interface. This helps the operator to solve the problem better.
Design of steel drum dangerous goods packaging drop test machine
Subroutine