Today we introduce a national invention patent for invention, a test method for the dynamic characteristics of ball valves. The patent was filed by Suzhou Industrial Park Sidade Valve Co., Ltd. and was authorized to be announced on November 9, 2016.
Description
The invention relates to the technical field of valve assembly testing, in particular to a test method for dynamic characteristic parameters of a ball valve.
Background of the invention
As a kind of actuator, the valve is an indispensable control equipment in various fields such as petroleum, chemical, power station, long-distance pipeline, shipbuilding, nuclear industry, various cryogenic engineering, aerospace and marine oil recovery. Among them, ball valves, as a main type of valve, are constantly being used in various industries at home and abroad.
The ball valve refers to a valve that uses a valve stem to drive a circular through hole as a starting and closing member and rotates around the axis of the ball valve. It is mainly used to open and close the pipeline and equipment medium, and can also be used for fluid regulation and control. Ball valve performance testing mainly includes strength performance testing, sealing performance testing, flow resistance testing, motion performance testing and service life testing.
For the regulating valve, the regulating valve is managed in the instrument and meter industry in China, and it is not involved in the general valve industry. According to the requirements of GB4213 "General Technical Conditions for Pneumatic Control Valves" and GB10869 "Technical Conditions for Power Station Control Valves", the main test and test items for regulating valves include: hysteresis; dead zone; leakage; rated stroke deviation And shell pressure test, etc. For ball valves in general-purpose valves, the manufacturer's routine tests do not cover flow, opening, pressure and temperature characteristics testing and dead zone testing.
In the actual application, the current ball valve needs to meet the basic requirements of conventional strength, sealing and flow resistance, and more and more work dynamic performance is included in the evaluation of the quality of the ball valve.
Existing domestic manufacturers can only meet the test of strength, sealing, flow resistance, action performance and service life when testing the performance of ball valves. It is impossible to provide a computer-based automatic control and data. Test methods and platforms for acquisition analysis.
Summary of the invention
In view of the above technical problems, the object of the present invention is to break through the deficiencies of the existing ball valve dynamic characteristic parameter testing method, and provide a reasonable design, which can automatically switch the test medium, automatically adjust the test medium pressure and flow, and automatically adjust the ball valve opening degree. Real-time monitoring of pressure and flow, real-time monitoring of medium temperature, data pre-processing, automatic analysis and preservation of ball valve dynamic characteristic parameters, and characteristic parameter curve display, etc. The test requirements of various types of ball valves have practical significance for the promotion of standardized testing of ball valve dynamic characteristics and the improvement of the overall process level of the ball valve industry in China.
In order to achieve the above object, the present invention provides the following technical solution: a test system for ball valve dynamic characteristic parameters, the test system mainly includes a hardware control system and a software control system, wherein the hardware control system is used as virtual instrument software. The carrier and the executing component complete the automatic switching of the test medium, the automatic adjustment of the test medium pressure and the flow rate, and the automatic adjustment of the servo motor driving ball valve opening degree; the software control system realizes the pressure data acquisition and data preprocessing, the flow data collection and the data pre-processing Processing, testing medium temperature data acquisition and data pre-processing, ball valve dynamic characteristic parameter automatic analysis and preservation, characteristic parameter curve real-time display function; through the hardware control system and software control system work together to achieve ball valve opening degree, pressure, flow and Automatic testing and analysis of temperature characteristics and dynamic characteristics of dead zone characteristics.
Figure is a schematic view of the structure of the present invention
Further, the hardware control system mainly comprises a multi-media container, a water tank, a fuel tank, a bellows, a heater, a refrigerator, a water pump, an oil pump and a fan drive unit, a water pump, an oil pump, a fan, a test medium switching valve, a flow regulator, and a pressure. Regulator, servo motor, servo drive, valve stem drive mechanism, industrial computer, touch display, motion control card, data acquisition card, pre-valve pressure sensor, post-valve pressure sensor, flow sensor, temperature sensor, rotary encoder and standby The ball valve is tested; wherein the multi-media container comprises a water tank, a fuel tank and a bellows, and three test media of water, oil and gas are provided, and the test medium is automatically switched by the connected water pump, oil pump or fan drive unit, and the test medium is used at the same time. The circulation line is closed by the test medium switching valve; the multi-media container is equipped with a heat exchanger and a refrigerator for changing the temperature of the medium; the flow regulator and the pressure regulator for adjusting the flow rate and pressure of the test medium are installed in the test circuit Medium; industrial computer through video cable and USB cable and touch display
The pressure sensor is divided into a pre-valve pressure sensor and a post-valve pressure sensor, respectively placed in the pipeline before and after the ball valve to be tested, for measuring the pressure data before and after the valve; the flow sensor and the temperature sensor are placed in the tube in front of the test ball valve In the road, it is used to measure the flow rate through the ball valve and the temperature of the test medium. The pressure, flow and temperature sensors are connected to the data acquisition card through the shielded cable , and the test data is transmitted to one end of the industrial computer; the pulse output port of the motion control card is connected. The pulse signal driving port of the servo driver can control the start and stop of the servo motor; the digital output port of the motion control card is connected to the direction control port of the servo driver to control the rotation direction of the servo motor; the servo driver is connected to the servo motor to realize the motor The running drive, and the servo motor is connected with the valve stem drive mechanism to drive the ball valve to open or close; the rotary encoder is mounted on the synchronous shaft of the valve stem drive structure, and is connected to the motion control card through the shielded data line for measuring the opening of the ball valve Degree value.
Preferably, the function module automatically analyzes and saves the dynamic characteristic parameters of the ball valve, and performs dynamic characteristic analysis on the two dynamic characteristic parameters of the pressure, the flow, the opening and the temperature data, and the dead zone characteristic respectively through the software control system. And automatic recording, and the pressure, flow, opening and temperature characteristic curves and dead zone characteristic curves obtained after analysis are saved in the industrial computer.
Moreover, when the function module realizes the real-time display of the characteristic parameter curve, the pressure, flow, opening and temperature characteristic curves and the dead zone characteristic curve obtained by the test are displayed on the touch display in real time through the software control system.
As the application of the above test system, the present application also proposes a test method for the dynamic characteristic parameters of the ball valve, and uses the above test system to automatically test and analyze the opening, pressure, flow and temperature characteristics of the ball valve, and the dynamic characteristic parameters of the dead zone characteristic. Automatic test and analysis to test the dynamic characteristics of the ball valve
The invention has the beneficial effects that the virtual instrument-based automatic control and testing technology is applied to the testing of the dynamic characteristic parameters of the ball valve, and the defects of the test method for the dynamic characteristic parameters of the product in the ball valve industry are solved, and the industry can only be used at present. Manually adjust parameters and record data mode, using computer-based hardware system and virtual instrument-based software engineering framework to achieve complete automatic test control and data acquisition, and provide automatic preservation and analysis of ball valve dynamic characteristic parameters. It provides valuable reference information and effective analysis methods for machine tool manufacturers to further improve the design level of ball valves.
Description
The invention relates to the technical field of valve assembly testing, in particular to a test method for dynamic characteristic parameters of a ball valve.
Background of the invention
As a kind of actuator, the valve is an indispensable control equipment in various fields such as petroleum, chemical, power station, long-distance pipeline, shipbuilding, nuclear industry, various cryogenic engineering, aerospace and marine oil recovery. Among them, ball valves, as a main type of valve, are constantly being used in various industries at home and abroad.
The ball valve refers to a valve that uses a valve stem to drive a circular through hole as a starting and closing member and rotates around the axis of the ball valve. It is mainly used to open and close the pipeline and equipment medium, and can also be used for fluid regulation and control. Ball valve performance testing mainly includes strength performance testing, sealing performance testing, flow resistance testing, motion performance testing and service life testing.
For the regulating valve, the regulating valve is managed in the instrument and meter industry in China, and it is not involved in the general valve industry. According to the requirements of GB4213 "General Technical Conditions for Pneumatic Control Valves" and GB10869 "Technical Conditions for Power Station Control Valves", the main test and test items for regulating valves include: hysteresis; dead zone; leakage; rated stroke deviation And shell pressure test, etc. For ball valves in general-purpose valves, the manufacturer's routine tests do not cover flow, opening, pressure and temperature characteristics testing and dead zone testing.
In the actual application, the current ball valve needs to meet the basic requirements of conventional strength, sealing and flow resistance, and more and more work dynamic performance is included in the evaluation of the quality of the ball valve.
Existing domestic manufacturers can only meet the test of strength, sealing, flow resistance, action performance and service life when testing the performance of ball valves. It is impossible to provide a computer-based automatic control and data. Test methods and platforms for acquisition analysis.
Summary of the invention
In view of the above technical problems, the object of the present invention is to break through the deficiencies of the existing ball valve dynamic characteristic parameter testing method, and provide a reasonable design, which can automatically switch the test medium, automatically adjust the test medium pressure and flow, and automatically adjust the ball valve opening degree. Real-time monitoring of pressure and flow, real-time monitoring of medium temperature, data pre-processing, automatic analysis and preservation of ball valve dynamic characteristic parameters, and characteristic parameter curve display, etc. The test requirements of various types of ball valves have practical significance for the promotion of standardized testing of ball valve dynamic characteristics and the improvement of the overall process level of the ball valve industry in China.
In order to achieve the above object, the present invention provides the following technical solution: a test system for ball valve dynamic characteristic parameters, the test system mainly includes a hardware control system and a software control system, wherein the hardware control system is used as virtual instrument software. The carrier and the executing component complete the automatic switching of the test medium, the automatic adjustment of the test medium pressure and the flow rate, and the automatic adjustment of the servo motor driving ball valve opening degree; the software control system realizes the pressure data acquisition and data preprocessing, the flow data collection and the data pre-processing Processing, testing medium temperature data acquisition and data pre-processing, ball valve dynamic characteristic parameter automatic analysis and preservation, characteristic parameter curve real-time display function; through the hardware control system and software control system work together to achieve ball valve opening degree, pressure, flow and Automatic testing and analysis of temperature characteristics and dynamic characteristics of dead zone characteristics.
Figure is a schematic view of the structure of the present invention
Further, the hardware control system mainly comprises a multi-media container, a water tank, a fuel tank, a bellows, a heater, a refrigerator, a water pump, an oil pump and a fan drive unit, a water pump, an oil pump, a fan, a test medium switching valve, a flow regulator, and a pressure. Regulator, servo motor, servo drive, valve stem drive mechanism, industrial computer, touch display, motion control card, data acquisition card, pre-valve pressure sensor, post-valve pressure sensor, flow sensor, temperature sensor, rotary encoder and standby The ball valve is tested; wherein the multi-media container comprises a water tank, a fuel tank and a bellows, and three test media of water, oil and gas are provided, and the test medium is automatically switched by the connected water pump, oil pump or fan drive unit, and the test medium is used at the same time. The circulation line is closed by the test medium switching valve; the multi-media container is equipped with a heat exchanger and a refrigerator for changing the temperature of the medium; the flow regulator and the pressure regulator for adjusting the flow rate and pressure of the test medium are installed in the test circuit Medium; industrial computer through video cable and USB cable and touch display
The pressure sensor is divided into a pre-valve pressure sensor and a post-valve pressure sensor, respectively placed in the pipeline before and after the ball valve to be tested, for measuring the pressure data before and after the valve; the flow sensor and the temperature sensor are placed in the tube in front of the test ball valve In the road, it is used to measure the flow rate through the ball valve and the temperature of the test medium. The pressure, flow and temperature sensors are connected to the data acquisition card through the shielded cable , and the test data is transmitted to one end of the industrial computer; the pulse output port of the motion control card is connected. The pulse signal driving port of the servo driver can control the start and stop of the servo motor; the digital output port of the motion control card is connected to the direction control port of the servo driver to control the rotation direction of the servo motor; the servo driver is connected to the servo motor to realize the motor The running drive, and the servo motor is connected with the valve stem drive mechanism to drive the ball valve to open or close; the rotary encoder is mounted on the synchronous shaft of the valve stem drive structure, and is connected to the motion control card through the shielded data line for measuring the opening of the ball valve Degree value.
Preferably, the function module automatically analyzes and saves the dynamic characteristic parameters of the ball valve, and performs dynamic characteristic analysis on the two dynamic characteristic parameters of the pressure, the flow, the opening and the temperature data, and the dead zone characteristic respectively through the software control system. And automatic recording, and the pressure, flow, opening and temperature characteristic curves and dead zone characteristic curves obtained after analysis are saved in the industrial computer.
Moreover, when the function module realizes the real-time display of the characteristic parameter curve, the pressure, flow, opening and temperature characteristic curves and the dead zone characteristic curve obtained by the test are displayed on the touch display in real time through the software control system.
As the application of the above test system, the present application also proposes a test method for the dynamic characteristic parameters of the ball valve, and uses the above test system to automatically test and analyze the opening, pressure, flow and temperature characteristics of the ball valve, and the dynamic characteristic parameters of the dead zone characteristic. Automatic test and analysis to test the dynamic characteristics of the ball valve
The invention has the beneficial effects that the virtual instrument-based automatic control and testing technology is applied to the testing of the dynamic characteristic parameters of the ball valve, and the defects of the test method for the dynamic characteristic parameters of the product in the ball valve industry are solved, and the industry can only be used at present. Manually adjust parameters and record data mode, using computer-based hardware system and virtual instrument-based software engineering framework to achieve complete automatic test control and data acquisition, and provide automatic preservation and analysis of ball valve dynamic characteristic parameters. It provides valuable reference information and effective analysis methods for machine tool manufacturers to further improve the design level of ball valves.
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