Simulation test equipment for control equipment of industrial gas filling busbar

Abstract

The utility model relates to the technical field of a testing device of a control system, and provides a simulation testing device of a control device of an industrial gas filling busbar, which comprises a gas conveying pipeline, a simulator circuit board and a temperature simulation device connected with the simulator circuit board, the simulator circuit board is connected with the to-be-tested control equipment; the temperature simulation device comprises a semiconductor chilling plate and a first temperature sensor, the direction and the magnitude of current input into the semiconductor chilling plate to pass through are controlled to achieve temperature change, the first temperature sensor detects the temperature of the semiconductor chilling plate, and simulation of the working process of the vaporizer is achieved. According to the utility model, the whole temperature range of the vaporizer is simulated by arranging the semiconductor chilling plate, and a real vaporizer does not need to be arranged, so that the setting cost of simulation equipment is reduced, the wide-range adjustment of the temperature is reliably realized, and the response test of the control equipment to be tested when the temperature is abnormal can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field related to inspection and testing of control systems, in particular to simulation testing equipment for control equipment of industrial gas filling busbars. Background Art

[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] Industrial gas is one of the indispensable substances in the industrial production process, and its application field is very wide. However, due to the special properties of some industrial gases such as high pressure, flammability, explosiveness, toxicity, and easy to cause suffocation, improper use will cause personal injury and property loss. Therefore, when using industrial gases, relevant safety requirements must be strictly observed to ensure the safety and stability of the production process. Industrial gas filling control equipment is used to intelligently control the operation of gas filling equipment. It responds to various abnormal working conditions such as overpressure, leakage, leakage, overtemperature, etc. through the built-in control system, alarms or controls the action of the actuator to ensure the safe operation of the equipment; in the research and development stage of industrial gas filling control equipment, it is necessary to simulate the normal working state and various abnormal states during the filling process to verify whether the control system meets the design requirements. In the research and development and debugging stage of industrial gas filling control equipment, it is necessary to simulate not only the normal filling process of industrial gas, but also the abnormal working process when a fault occurs. In addition, when the industrial gas filling equipment is designed and produced, it is necessary to conduct quality inspection on the produced control equipment.

[0004] A general control system is set up in the control equipment, and the system functions are completed by setting program functions. The control system of the industrial gas filling bus includes temperature and gas pipeline pressure control. When the temperature or pressure exceeds a certain range, the control equipment responds, and the corresponding actuator works to control the start and stop control of the gas filling bus. When designing the gas filling bus control equipment, it is necessary to conduct R&D debugging or production site testing, use actual bus equipment to fill real industrial gases, and simulate actual equipment to simulate abnormal conditions such as overpressure, leakage, leakage, overtemperature, etc., and output test signals to test the control system in the control equipment. There are problems of high cost and high risk.

[0005] In summary, testing the control equipment of the industrial gas filling system uses actual industrial gases and industrial equipment actually installed on site to debug and test abnormal conditions, which will pose a risk to personal safety and equipment safety, and the efficiency of debugging and testing is also very low. Utility Model Content

[0006] In order to solve the above problems, the utility model proposes a simulation test device for the control equipment of the industrial gas filling busbar, which simulates the working process of the large industrial gas filling busbar equipment, and simulates the large-volume and high-risk actual industrial gas filling equipment through a small-volume and safety-risk-free micro-simulation test device, which is used in the research and development, production and commissioning of industrial gas filling related equipment. Based on the simulation test device, the response of the control equipment is tested to see if it meets the requirements, so as to realize the rapid detection of the control equipment of the industrial gas filling equipment.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] One or more embodiments provide a simulation test device for a control device of an industrial gas filling bus, comprising: a gas delivery pipeline, a simulator circuit board, and a temperature simulation device connected to the simulator circuit board; the simulator circuit board is connected to the control device to be tested;

[0009] The temperature simulation device includes a semiconductor refrigeration chip and a first temperature sensor, which controls the direction and magnitude of the current input to the semiconductor refrigeration chip to achieve temperature change. The first temperature sensor detects the temperature of the semiconductor refrigeration chip to achieve temperature simulation of the working process of the evaporator.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] In the utility model, the semiconductor cooling sheet can generate a temperature ranging from several tens of degrees below zero to several tens of degrees above zero by controlling the direction and magnitude of the input current, so as to simulate the temperature change during the working process of the vaporizer. By setting the semiconductor cooling sheet to simulate the full temperature range of the vaporizer, it is not necessary to set up a real vaporizer, which reduces the setting cost of the simulation equipment, reliably realizes the wide range adjustment of the temperature, and can realize the response test of the control equipment to be tested when the vaporizer temperature is abnormal.

[0012] The advantages of the present invention and additional advantages will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute a limitation on the present invention.

[0014] Figure 1 It is a structural schematic diagram of the simulation test equipment of Example 1 of the utility model;

[0015] Among them, 1. a first temperature sensor, 2. an ambient temperature sensor, 3. a semiconductor refrigeration sheet, 4. a micro air pump, 5. a flow meter, 6. a manual valve 1, 7. a manual valve 2, 8. a pressure sensor 1, 9. a pressure sensor 2, 10. a gas cylinder 2, 11. a gas cylinder 1, 12. a start button, 13. a stop button, 14. a second wireless module, 15. a computer, 16. a power adapter, 17. a control device to be tested, 18. an interface circuit module, 19. a single-chip microcomputer, 20. a first wireless module, 21. a display device, 22. a simulator circuit board, 23. a vaporizer. DETAILED DESCRIPTION

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] It should be noted that the following detailed descriptions are exemplary and are intended to provide further description of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0018] It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof. It should be noted that, in the absence of conflict, the various embodiments in the utility model and the features in the embodiments can be combined with each other. The embodiments will be described in detail below in conjunction with the accompanying drawings.

[0019] In view of the problems of the background technology, the utility model provides a small-volume, low-flow, low-operating-voltage simulation test equipment, which simulates a full-function industrial gas filling production line, and is used for the research and development and debugging of industrial filling control equipment and the inspection and testing during production, replacing the actual industrial gas filling production line to complete the research and development and debugging of supervision and control equipment. Thereby reducing safety hazards and improving research and development efficiency. The following is an explanation with specific embodiments.

[0020] In the technical solutions disclosed in one or more embodiments, Figure 1 As shown, the simulation test equipment of the control equipment of the industrial gas filling bus includes a gas delivery pipeline, a simulator circuit board 22, and a temperature simulation device connected to the simulator circuit board 22; the simulator circuit board 22 is connected to the control equipment 17 to be tested;

[0021] The temperature simulation device includes a semiconductor refrigeration chip 3 and a first temperature sensor 1, which controls the direction and magnitude of the current input to the semiconductor refrigeration chip 3 to achieve temperature changes. The first temperature sensor 1 detects the temperature of the semiconductor refrigeration chip 3 to achieve temperature simulation of the working process of the evaporator.

[0022] In this embodiment, the semiconductor refrigeration chip 3 can generate a temperature ranging from several tens of degrees below zero to several tens of degrees above zero by controlling the direction and magnitude of the input current, so as to simulate the temperature change during the operation of the vaporizer. By setting the semiconductor refrigeration chip 3 to simulate the full temperature range of the vaporizer, there is no need to set up a real vaporizer 23, which reduces the setting cost of the simulation equipment, reliably realizes the wide range adjustment of the temperature, and can realize the response test of the control device to be tested when the temperature is abnormal.

[0023] As a further technical solution, in order to achieve rapid adjustment of the temperature of the semiconductor refrigeration plate 3, the temperature simulation device is further provided with a heat dissipation device, which may be a heat dissipation fan for achieving auxiliary heat dissipation of the semiconductor refrigeration plate.

[0024] In practice, the working process of the actual vaporizer is:

[0025] In the actual process of filling gas cylinders with industrial gases, the vaporizer absorbs the heat from the ambient air through a large area of ​​heat sink, converts the low-temperature liquid gas from liquid to gas, and then fills the gas cylinder. If the liquid gas conversion in the vaporizer is not sufficient, and liquid gas enters the gas cylinder, the volume of the liquid will expand more than 800 times after it turns into gas, and the pressure in the gas cylinder will increase sharply instantly, causing an explosion accident, so it is strictly forbidden for liquid gas to enter the gas cylinder.

[0026] In order to prevent liquid gas from entering the gas cylinder, a low-temperature sensor is installed at the gas output pipe of the vaporizer. When liquid gas passes through, the temperature at the outlet of the output pipe will drop sharply to below minus 50 degrees Celsius. To ensure safety, the low-temperature threshold is set at minus 30 degrees Celsius. Protective measures must be taken when the temperature is below minus 30 degrees Celsius.

[0027] When developing control equipment for gas filling control and supervision, it is necessary to measure the temperature of the vaporizer output pipeline, which must not only meet the measurement requirements during normal filling, but also simulate abnormal conditions, that is, the situation where liquid gas enters the output pipeline. During the test process, if an actual vaporizer is used, abnormal testing requires artificially creating an abnormal state to output liquid gas, which will have a very large safety risk.

[0028] In this embodiment, by simulating the temperature output under abnormal conditions and based on the response of the control device under abnormal temperature test, a temperature simulation device of the evaporator is formed by using a semiconductor refrigeration plate 3 and a heat dissipation device. Without the need for a real evaporator 23 to fail, the entire working process of the evaporator 23 can be simulated to detect the control function of the control device to be tested on the operation of the evaporator, thereby greatly improving safety.

[0029] Specifically, the control device 17 to be tested may be a device for setting a control system program, such as a device control cabinet or a controller;

[0030] In some embodiments, the simulator circuit board 22 is connected to the micro air pump 4 on the gas delivery pipeline and the sensor for collecting signals; the simulator circuit board 22 is connected to the control device to be tested 17 for transmitting detection data and receiving instructions from the control device to be tested;

[0031] In a further technical solution, an interface circuit module 18 and a controller are provided on the simulator circuit board 22, the controller is connected to the interface circuit module 18, the controller is connected to the control device 17 to be tested through the interface circuit module 18, and the controller processes the collected data and establishes a connection with the external device;

[0032] The collected data includes data collected from the temperature simulation device and the gas delivery pipeline, including temperature data, flow data, pressure data, etc.

[0033] Specifically, the controller adopts the single-chip microcomputer 19; the single-chip microcomputer 19 model can adopt the TW32F003 chip with a 32-bit ARM Cortex M0 core.

[0034] Among them, the external device can be a control terminal, such as a computer 15, a smart phone or other terminal devices;

[0035] As a further technical solution, the connection between the controller and the external device can be wireless communication, with a first wireless module 20 being provided at the controller end and a second wireless module 14 being provided at the external device end; the first wireless module 20 can use a TTL interface and the second wireless module 14 can use a USB interface.

[0036] Optionally, a display device 21 is also provided, and the display device 21 can be an LED display or a liquid crystal display; it is used to display the collected data or the analysis results output by the controller;

[0037] When in use, the data processed by the single-chip microcomputer 19 can be displayed through the display device 21, and the signal can also be transmitted wirelessly through the first wireless module 20 using the TTL interface. The external device such as the debugging computer 15 exchanges data with the single-chip microcomputer 19 through the second wireless module 14 using the USB interface, thereby realizing the wireless debugging function. Using wireless debugging greatly improves the development efficiency and production test efficiency;

[0038] Optionally, the temperature simulation device also includes a pipeline temperature sensor and an ambient temperature sensor 2, which are respectively connected to the simulator circuit board; the pipeline temperature sensor is arranged on the gas delivery pipeline for measuring the filling gas temperature; the ambient temperature sensor is used for measuring the ambient temperature.

[0039] Optionally, sensors including flow meters and pressure sensors are provided on the gas delivery pipeline;

[0040] In some embodiments, the gas delivery pipeline includes a micro air pump 4, a flow meter 5 and a plurality of bus branches connected in sequence; the bus branch includes a manual valve, a pressure sensor and a gas cylinder connected in sequence; the flow meter 5 and the pressure sensor are connected to the simulator circuit board, and are respectively connected to the controller through the interface circuit module 18;

[0041] Furthermore, a start button 12 and a stop button 13 are provided, and the start button 12 and the stop button 13 are connected to the controller via an interface circuit module 18 for controlling the operation of the micro air pump 4 .

[0042] When in use, the interface circuit module 18 can control the flow rate of the micro air pump 4 by controlling the output DC voltage, so as to achieve the purpose of simulating speed regulation and filling speed. When gas flows through the micro flow meter 5, its output will generate a flow pulse proportional to the flow rate, which is sent to the IO port of the single-chip microcomputer 19 through the interface circuit module 18 for counting. After calculation by the single-chip microcomputer 19, the filling speed and the accumulated filling flow rate can be obtained.

[0043] Optionally, the micro air pump 4 uses air as the gas source, which is safer than using flammable, explosive and toxic gases; the model of the micro air pump 4 can be a low-pressure DC diaphragm pump EDZP02-03, which is an electronic sphygmomanometer air pump with a maximum pressure of 0.047Mpa;

[0044] Specifically, in this embodiment, two bus branches are provided:

[0045] The first bus branch includes a manual valve 6, a pressure sensor 8 and a gas cylinder 11;

[0046] The second bus branch includes a manual valve 2 7, a pressure sensor 2 9 and a gas cylinder 2 10;

[0047] This embodiment uses a micro air pump 4, which generates very low pressure. The micro air pump 4 provided in this embodiment has a maximum pressure of only 0.047 Mpa, and the pressure is low. The gas cylinder can be modified using an existing bottle, such as a plastic bottle.

[0048] Specifically, the gas cylinder may adopt a simulated gas cylinder device, which includes a bottle body and a sealing cover, on which a balloon is fixedly arranged, and the balloon is arranged in the bottle body; after the sealing cover is arranged on the bottle body, the balloon is in the bottle body; the bottle body may be a plastic bottle;

[0049] The balloon arranged on the sealing cover can be a colored balloon, and the pressure change can be observed visually according to the expansion degree of the balloon in the bottle. As the pressure increases, the volume of the balloon expands.

[0050] When in use, manual valve 16 and manual valve 27 are used to simulate the manual valves of the busbar, and different branches can be switched for filling by switching the valves. When manual valve 16 is opened, the gas cylinder 11 starts to be filled. As the cumulative filling flow increases, the pressure of the gas cylinder 11 and the pipeline gradually rises. The pressure change data can be obtained through the pressure sensor 18. The output signal of the pressure sensor 8 is sent to the single-chip microcomputer 19 through the interface module 18 for data calculation and storage. After the single-chip microcomputer 19 obtains the flow and pressure data, it can analyze the filling process and compare it with the flow pressure curve preset in the program to determine whether the filling is normal.

[0051] Among them, the curve comparison method is an existing technology and can be realized. When there is a leak, the slope of the pressure curve will decrease. When the valve of the gas cylinder fails to open, the slope of the pressure curve will increase. During normal filling, the slope of the filling curve changes smoothly and gradually. When the filling curve suddenly changes, the filling is abnormal. Various filling anomalies can be judged by analyzing the curve. It is possible to test whether the control device 17 to be debugged meets the design requirements by actively creating some abnormal working conditions.

[0052] The data processed by the single-chip microcomputer 19 can be displayed on a liquid crystal display screen, or the signal can be wirelessly transmitted to an external device through a first wireless module 20 using a TTL interface. An external device such as a debugging computer 15 exchanges data with the single-chip microcomputer 19 through a second wireless module 14 using a USB interface, thereby realizing a wireless debugging function. Using wireless debugging greatly improves development efficiency and production test efficiency.

[0053] The single chip microcomputer 19 processes the acquired information such as pipeline temperature, ambient temperature, pipeline pressure, pipeline flow, etc., and generates a signal identical to that of a real device in actual operation, which is used for R&D debugging or production testing of the control device to be debugged.

[0054] Optionally, the simulation test equipment can use a separate power supply or be powered by AC power. A power adapter 16 can be set to connect to the AC power to convert the AC power into 24V weak DC to power the device. The simulation device uses low-voltage DC compared to the 380V AC power on site, which improves the safety of debugging and production testing.

[0055] In this embodiment, the device used can be a micro device, and the working voltage uses a DC voltage lower than 24V. The size of the entire simulation device can be less than 50cm*30cm*10cm, and it can be completely placed on a workbench for use, and has a wireless debugging function.

[0056] Air is used to replace various flammable, explosive and toxic gases. Even if there is a leak in the simulation device, there will be no safety risk. Various abnormal working conditions such as overpressure, leakage, undercharging and overtemperature can be simulated by dynamically modifying parameters. The debugging process is safe and efficient. The sensor data can be recorded and processed by the single-chip microcomputer, displayed on the display screen, and communicated with the computer 15 through the wireless module. The data of the sensor and equipment operation can be recorded and analyzed; automated testing and paperless recording can be realized during production testing.

[0057] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A simulation test device for the control equipment of the industrial gas filling bus, characterized in that : including a gas delivery pipeline, a simulator circuit board, and a temperature simulation device connected to the simulator circuit board; the simulator circuit board is connected to the control device to be tested; The temperature simulation device includes a semiconductor refrigeration chip and a first temperature sensor, which controls the direction and magnitude of the current input to the semiconductor refrigeration chip to achieve temperature change. The first temperature sensor detects the temperature of the semiconductor refrigeration chip to achieve temperature simulation of the working process of the evaporator.

2. The simulation test device for the control device of the industrial gas filling bus as claimed in claim 1, characterized in that: An interface circuit module and a controller are arranged on the simulator circuit board. The controller is connected to the interface circuit module. The controller is connected to the control device to be tested through the interface circuit module. The controller processes the collected data and is connected to the external device.

3. The simulation test device for the control device of the industrial gas filling bus as claimed in claim 2, characterized in that: The external device is a control terminal, which can be a computer or a smart phone.

4. The simulation test device for the control device of the industrial gas filling bus as claimed in claim 2, characterized in that: The connection between the controller and external devices adopts wireless communication.

5. The simulation test device for the control device of the industrial gas filling bus as claimed in claim 1, characterized in that: The simulation test equipment is also provided with a display device, and the display device adopts an LED display or a liquid crystal display.

6. The simulation test device for the control device of the industrial gas filling bus as claimed in claim 1, characterized in that: The temperature simulation device also includes a pipeline temperature sensor and an ambient temperature sensor, which are respectively connected to the simulator circuit board; the pipeline temperature sensor is arranged on the gas transmission pipeline for measuring the filling gas temperature, and the ambient temperature sensor is used for measuring the ambient temperature.

7. The simulation test device for the control device of the industrial gas filling bus as claimed in claim 1, characterized in that: The gas delivery pipeline includes a micro air pump, a flow meter and a plurality of bus branches connected in sequence; the bus branches include a manual valve, a pressure sensor and a gas cylinder connected in sequence; the flow meter and the pressure sensor are connected to the simulator circuit board.

8. The simulation test device for the control device of the industrial gas filling bus as claimed in claim 7, characterized in that: A start button and a stop button are also provided, and the start button and the stop button are connected to the controller of the simulator circuit board through the interface circuit module on the simulator circuit board, and are used to control the operation of the micro air pump.

9. The simulation test device for the control device of the industrial gas filling bus as claimed in claim 7, characterized in that: The micro air pump uses air as the air source.

10. The simulation test device for the control device of the industrial gas filling bus as claimed in claim 7, characterized in that: The gas cylinder adopts a simulated gas cylinder device, which includes a bottle body and a sealing cover. A balloon is fixedly arranged on the sealing cover, and the balloon is arranged in the bottle body.

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