Valve positioner and control method for valve positioner

Abstract

The invention relates to the technical field of positioners, and discloses a valve positioner and a control method for the valve positioner.The valve positioner comprises a working part and a backup part, the working part and the backup part comprise a plurality of identical elements, and the working part is connected with an executing mechanism of a regulating valve and used for controlling the executing mechanism; the backup component is connected with the executing mechanism and used for replacing at least one part of the working component through at least one part of the backup component if it is detected that at least one part of the working component breaks down, so that the executing mechanism is controlled, and the valve opening degree of the adjusting valve is controlled; when the working part of the valve positioner breaks down, the backup part replaces the working part to work, and normal production is not affected.

Description

Technical Field

[0001] The present application relates to the technical field of positioners, and in particular to a valve positioner and a control method for the valve positioner. Background Art

[0002] As an indispensable field control instrument in the petrochemical and other industrial fields, the intelligent valve positioner plays a key role as the core accessory of the control valve. It usually works in conjunction with the pneumatic control valve to achieve precise control of the industrial process. Its core function is to receive instructions from the central control system and accurately adjust the valve opening through precise calculation and control mechanisms, thereby ensuring the stability and efficiency of the process.

[0003] The control mechanism of the intelligent valve positioner is based on the closed-loop control principle. Its internal structure mainly includes core components such as sensors, mainboards, and I / P units (electrical converters). The sensor is responsible for real-time monitoring of the valve stem position and feeding back the measured data to the mainboard for processing; the mainboard simultaneously collects the valve position data of the valve position sensor and the control instructions of the central control system through the A / D module (Analog-to-Digital Converter), converts the two into percentages for comparison, and determines whether the I / P unit should perform intake or exhaust operations based on the comparison results. In addition, the mainboard also integrates key modules, display modules, valve position feedback modules, and communication modules to realize functions such as human-computer interaction, status display, and communication. The I / P unit is responsible for converting the electrical signal sent by the mainboard into a gas signal, directly driving the actuator to perform intake, exhaust, or holding operations, thereby pushing the valve stem to move and adjusting the valve opening.

[0004] However, traditional intelligent valve positioners have limitations in design, especially their core components such as control motherboard, position sensor and I / P unit, which often adopt a single configuration and lack redundant design. This design significantly increases the risk of component failure when facing extreme working environments such as high temperature, strong vibration, corrosive media, etc. Once these key components fail, the control of the control valve will be abnormal, and in severe cases, the intelligent valve positioner may even need to be replaced as a whole. In industries such as petrochemicals and chemicals that have extremely high requirements for the safety of control valve pipeline control, this potential risk of failure is unacceptable because it may directly threaten production safety, product quality and environmental protection. Obviously, there is an urgent need for a new valve positioner to solve at least one of the above problems.

[0005] It should be noted that the above content only provides background technical information related to the present application and does not necessarily constitute prior art. Summary of the invention

[0006] In view of the above-mentioned shortcomings of the prior art, the present application provides a valve positioner and a control method for the valve positioner, so that when a working component in the valve positioner fails, a backup component can replace the working component to work without affecting normal production.

[0007] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by the practice of the present application.

[0008] According to one aspect of an embodiment of the present application, a valve positioner is provided, comprising a working component and a backup component, wherein the working component and the backup component comprise a plurality of identical elements; the working component is connected to an actuator of a regulating valve and is used to control the actuator so as to control the valve opening of the regulating valve; the backup component is connected to the actuator and is used to replace at least a portion of the working component with at least a portion of the backup component so as to control the actuator and the valve opening of the regulating valve if a failure of at least a portion of the working component is detected.

[0009] In one embodiment of the present application, based on the aforementioned solution, the working component includes a first mainboard, a first position sensor and a first I / P unit, and the backup component includes a second mainboard, a second position sensor and a second I / P unit.

[0010] In one embodiment of the present application, based on the aforementioned scheme, the first position sensor is connected to the first main board, and the first position sensor is used to measure the valve stem position of the regulating valve to obtain first valve position data; the first main board is connected to the first I / P unit, and the first main board is used to collect the first valve position data, calculate the first actual valve position percentage according to the first valve position data, and receive the expected valve position percentage sent by the central control system, and generate a first control instruction based on the comparison result of the first actual valve position percentage and the expected valve position percentage; the first I / P unit controls the actuator to perform intake, exhaust or holding operation according to the first control instruction to control the valve opening of the regulating valve.

[0011] In one embodiment of the present application, based on the aforementioned scheme, the second position sensor is connected to the second main board, and the second position sensor is used to measure the valve stem position of the regulating valve to obtain second valve position data; the second main board is connected to the second I / P unit, and the second main board is used to collect the second valve position data, and calculate the second actual valve position percentage based on the second valve position data, so that when at least part of the working component fails, the second main board receives the expected valve position percentage sent by the central control system, and generates a second control instruction based on the comparison result of the second actual valve position percentage and the expected valve position percentage, and then controls the second I / P unit to execute the second control instruction.

[0012] In one embodiment of the present application, based on the aforementioned scheme, the first main board is communicatively connected to the second main board to transmit communication data; the first position sensor is connected to the second main board, and the first I / P unit is connected to the second main board, so that when the first main board fails, the first main board can be replaced by at least the second main board; the second position sensor is connected to the first main board, and the second I / P unit is connected to the first main board, so that when the second main board fails, the second main board can be replaced by at least the first main board.

[0013] In one embodiment of the present application, based on the aforementioned scheme, the first main board and / or the second main board generates a test control command at a preset interval, and controls the backup component to control the actuator and the valve opening of the regulating valve according to the test control command.

[0014] In one embodiment of the present application, based on the aforementioned scheme, the second main board matches the first valve position data collected by the first position sensor with the preset valve position range. If the match fails, it is determined that the first position sensor has failed; the second main board obtains the input current, current temperature and stored data of the first main board. If at least one of the input current exceeds the preset current range, the current temperature exceeds the preset temperature range and the stored data verification fails, it is determined that the first main board has failed; the second main board obtains the adjustment time of the first I / P unit. If the adjustment time is greater than the preset time threshold, it is determined that the first I / P unit has failed.

[0015] In one embodiment of the present application, based on the aforementioned scheme, the first main board matches the first valve position data collected by the first position sensor with the preset valve position range. If the match fails, it is determined that the first position sensor has failed; the first main board obtains the input current, current temperature and stored data of the first main board. If at least one of the input current exceeds the preset current range, the current temperature exceeds the preset temperature range and the stored data verification fails, it is determined that the first main board has failed; the first main board obtains the adjustment time of the first I / P unit. If the adjustment time is greater than the preset time threshold, it is determined that the first I / P unit has failed.

[0016] In one embodiment of the present application, based on the aforementioned scheme, the valve positioner also includes a human-computer interaction module, which is communicatively connected to the first main board and / or the second main board, and the human-computer interaction module is used to display the first actual valve position percentage and / or the second actual valve position percentage; the human-computer interaction module is used to receive a switching instruction input by a user, and switch the working components according to the switching instruction, and the working components include the working components and the backup components; the human-computer interaction module is also used to display the status of the valve positioner to prompt the user.

[0017] According to one aspect of an embodiment of the present application, a control method for a valve positioner is provided, wherein the valve positioner includes a working component and a backup component, wherein the working component and the backup component include multiple identical elements, and the method includes: detecting the component status of the working component; if it is detected that at least a part of the working component fails, replacing at least a part of the working component with at least a part of the backup component, wherein the working component and the backup component are both connected to an actuator of a regulating valve, and the working component and the backup component are used to control the actuator to control the valve opening of the regulating valve.

[0018] Beneficial effects of the present application: The present application provides a valve positioner including a working part and a backup part, wherein the working part and the backup part include a plurality of identical elements, the working part is connected to the actuator of the regulating valve and is used to control the actuator to control the valve opening of the regulating valve, the backup part is connected to the actuator and is used to replace at least a part of the working part with at least a part of the backup part to control the actuator and control the valve opening of the regulating valve if a failure of at least a part of the working part is detected, and the working part can be replaced by the backup part when a failure of the working part occurs, without affecting normal production, thereby avoiding problems such as abnormal control of the regulating valve caused by failure of the working part under extreme conditions such as high temperature, vibration, and corrosion.

[0019] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0021] Figure 1 is a schematic structural diagram of a regulating valve shown in an exemplary embodiment;

[0022] Figure 2 is a functional principle block diagram of a valve positioner shown in an exemplary embodiment;

[0023] Figure 3 is a structural schematic diagram of a valve positioner shown in an exemplary embodiment of the present application;

[0024] Figure 4 A schematic diagram of the structure of a computer system suitable for implementing an electronic device of an embodiment of the present application is shown. DETAILED DESCRIPTION

[0025] The following will describe the implementation methods of the present application with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for illustrating the present application, not for limiting the scope of protection of the present application.

[0026] It should be noted that the illustrations provided in the following embodiments are only used to illustrate the basic concept of the present application in a schematic manner, and therefore the illustrations only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0027] In the following description, a large number of details are discussed to provide a more thorough explanation of the embodiments of the present application. However, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without these specific details. In other embodiments, well-known structures and devices are shown in the form of block diagrams rather than in detail to avoid making the embodiments of the present application difficult to understand.

[0028] First of all, it should be noted that CRC (Cyclic Redundancy Check) is the most commonly used error checking code in the field of data communication. The principle of CRC checking is based on the division operation. It uses a fixed polynomial (generator polynomial) to divide a data to be checked. During the data transmission or storage process, the sender will first generate a check code (CRC code) for checking according to certain rules based on the data to be transmitted, and attach it to the original information to form a new binary code sequence, and then send it out. After receiving the data, the receiver also checks according to the same rules to determine whether the data has errors during transmission. This rule is called "generator polynomial" in error control theory. Specifically, when there is no error in the data, the result of this division is an integer, that is, the remainder is 0; when there is an error in the data, the result of the division is not an integer, and the remainder is not 0. The receiver can judge whether the data is correct by comparing the remainder.

[0029] The control of valve opening by valve positioner is a closed loop control. Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of a regulating valve shown in an exemplary embodiment. The valve positioner is mainly composed of sensors, mainboards, I / P units, etc. The function of the sensor is mainly to measure the valve stem position in real time and send the measured data to the mainboard for collection; the function of the mainboard is mainly to collect the valve position data of the valve position sensor and the control command data of the central control (central control system) through the A / D module. The control command data includes the expected valve position data, and the two data are converted into percentages to obtain the current actual valve position percentage and the expected valve position percentage. By comparing the current actual valve position percentage and the expected valve position percentage, it is determined whether the I / P unit needs to be inlet or exhaust; of course, there are generally key modules, display modules, valve position feedback modules, communication modules, etc. on the mainboard; the function of the I / P unit is mainly to accept the control of the mainboard, convert electrical signals into gas signals, and control the actuator to inlet, exhaust or maintain operation. When the actuator is inlet or exhaust, it will push the valve stem to move downward or upward, and the valve opening will decrease or increase, driving the valve position sensor data to change.

[0030] Figure 2 This is a functional block diagram of a valve positioner according to an exemplary embodiment. Figure 2As shown in the figure, the intelligent valve positioner is a pneumatic control instrument and requires an external gas source input; the DCS system (Distributed Control System, also known as a distributed control system) controls the regulator to input 4-20mA current to the intelligent valve positioner to control the valve opening, and the intelligent valve positioner MCU (Microcontroller Unit) collects 4-20mA current through the A / D module to obtain the control command, and converts and calculates the input signal percentage, that is, the expected valve position percentage. At the same time, the MCU collects the valve position travel sensor data, that is, the valve position data, through the A / D module, and converts and calculates the current actual valve position percentage; the MCU controls the I / P unit to perform the operation of carrying out, exhausting or holding by comparing the size relationship between the input signal percentage and the current actual valve position percentage, thereby affecting the pressure in the actuator, thereby controlling the valve opening; the MCU converts the current actual valve position percentage into a 4-20mA current output and feeds it back to the DCS system through the current feedback module, and the pressure sensor mainly measures the gas source pressure and the output pressure.

[0031] In one embodiment of the present application, the valve positioner includes a working component and a backup component, and the working component and the backup component include multiple identical elements; the working component is connected to the actuator of the regulating valve and is used to control the actuator to control the valve opening of the regulating valve; the backup component is connected to the actuator and is used to replace at least a part of the working component with at least a part of the backup component to control the actuator and control the valve opening of the regulating valve if a failure of at least a part of the working component is detected.

[0032] In one embodiment of the present application, the working component includes a first main board, a first position sensor and a first I / P unit, and the backup component includes a second main board, a second position sensor and a second I / P unit.

[0033] Figure 3 is a schematic diagram of the structure of a valve positioner shown in an exemplary embodiment of the present application. It should be noted that: Figure 3 It is only a structural diagram of the valve positioner shown in the present application, which is displayed as an example and should not bring any limitation to the composition, connection, etc. of the valve positioner of the present application, nor should it bring any limitation to the function and scope of use of the embodiments of the present application. In fact, there may be other structures, and please refer to the text description for details. Figure 3 The modules corresponding to the numbers in the figure are as follows: 1: Mainboard 1, 2: Mainboard 2, 3: I / P unit 1, 4: I / P unit 2, 5: Position sensor 1, 6: Position sensor 2, 7: Air source interface, 8: Pressure output interface, 9: Control valve, 10: Mainboard 1 signal source, 11: Mainboard 1 current feedback, 12: Mainboard 2 signal source, 13: Mainboard 2 current feedback, 14: Human-computer interaction module. Figure 3As shown, the working parts include main board 1, I / P unit 1 and position sensor 1, and the backup parts include main board 2, I / P unit 2 and position sensor 2. It should be noted that the valve positioner main board 1 and main board 2 of the present application have all the functions of the ordinary intelligent valve positioner main board, including input current acquisition module, position sensor acquisition module, current feedback module, communication module, data storage module, IP unit control module, gas source pressure acquisition module, output pressure acquisition module, etc.

[0034] In one embodiment of the present application, a first position sensor is connected to a first main board, and the first position sensor is used to measure the valve stem position of the regulating valve to obtain first valve position data; the first main board is connected to a first I / P unit, and the first main board is used to collect the first valve position data, calculate a first actual valve position percentage based on the first valve position data, and receive an expected valve position percentage sent by a central control system, and generate a first control instruction based on a comparison result of the first actual valve position percentage and the expected valve position percentage; the first I / P unit controls the actuator to perform intake, exhaust or holding operations according to the first control instruction to control the valve opening of the regulating valve.

[0035] In this embodiment, continue to refer to Figure 3 As shown, when the valve positioner is working normally, the air source is provided to the positioner through the air source interface (7), and the pressure output interface (8) is connected to the actuator of the regulating valve (9); the main board 1 (1) collects the first valve position data of the position sensor 1 (5) and the command data input by the main board 1 signal source (10), namely the control command data, wherein the control command data includes the expected valve position data, and the first valve position data and the expected valve position data are respectively converted to obtain the first actual valve position percentage and the expected valve position percentage, and a first control instruction is generated based on the comparison result of the first actual valve position percentage and the expected valve position percentage, and the I / P unit 1 (3) is controlled to perform intake, exhaust or maintenance according to the first control instruction to adjust the valve position, and the first actual valve position percentage is fed back to the upper layer system, namely the central control system, through the main board 1 current feedback (11).

[0036] In one embodiment of the present application, a second position sensor is connected to a second main board, and the second position sensor is used to measure the valve stem position of the regulating valve to obtain second valve position data; the second main board is connected to a second I / P unit, and the second main board is used to collect the second valve position data, and calculate the second actual valve position percentage based on the second valve position data, so that when at least a part of the working component fails, the second main board receives the expected valve position percentage sent by the central control system, and generates a second control instruction based on the comparison result of the second actual valve position percentage and the expected valve position percentage, and then controls the second I / P unit to execute the second control instruction.

[0037] In this embodiment, continue to refer to Figure 3As shown, when the valve positioner is working normally, the main board 2 (2), the I / P unit 2 (4), and the position sensor 2 (6) are in hot standby state. The main board 2 (2) collects the second valve position data of the position sensor 2 (6), and calculates the second actual valve position percentage based on the second valve position data. The second actual valve position percentage is fed back to the upper layer system through the main board 2 current feedback (13). The system receives two sets of feedback signals, namely the valve positioner main board 1 current feedback (11) and the main board 2 current feedback (13), and controls the I / P unit 2 (4) to be in a holding state.

[0038] In one embodiment of the present application, the first main board is communicatively connected to the second main board to transmit communication data; the first position sensor is connected to the second main board, and the first I / P unit is connected to the second main board, so that when the first main board fails, the first main board can be replaced by at least the second main board; the second position sensor is connected to the first main board, and the second I / P unit is connected to the first main board, so that when the second main board fails, the second main board can be replaced by at least the first main board.

[0039] In this embodiment, refer to Figure 3 As shown, the main board 1 (1) is connected to the main board 2 (2) for communication transmission of data; the main board 1 (1) is connected to the I / P unit 1 (3), the I / P unit 2 (4), the position sensor 1 (5) and the position sensor 2 (6); the main board 2 (2) is connected to the I / P unit 1 (3), the I / P unit 2 (4), the position sensor 1 (5) and the position sensor 2 (6); the I / P unit 1 (3) and the I / P unit 2 (4) are connected to the actuator of the regulating valve (9) through the pressure output interface (8), so that when one or more of the main board 1 (1), the position sensor 1 (5) and the IP unit 1 (3) fails, the valve positioner can enter the backup control state, that is, the opening of the regulating valve is controlled by one or more of the backup components of the main board 2 (2), the IP unit 2 (4) and the position sensor 2 (6), so as not to affect normal production.

[0040] In this embodiment, at least a part of the working components in which the fault occurs is determined as a faulty component, and the faulty component includes at least one of the first main board, the first position sensor and the first I / P unit. The faulty component can be replaced by a corresponding component of the faulty component, or the same component can be replaced by the corresponding component and other components together. The corresponding component includes at least one of the second main board, the second position sensor and the second I / P unit, and the other components are components in the backup component except the corresponding component. For example, when position sensor 1(5) fails, position sensor 2(6) can replace position sensor 1(5), that is, the main board 1(1), position sensor 2(6) and IP unit 1(3) can be used to control the opening of the regulating valve; position sensor 2(6) and main board 2(2) can also replace position sensor 1(5) and main board 1(1), that is, the main board 2(2), IP unit 1(3) and position sensor 2(6) can be used to control the opening of the regulating valve; position sensor 2(6) and I / P unit 2(4) can also replace position sensor 1(5) and I / P unit 1(3), that is, the main board 1(1), IP unit 2(4) and position sensor 2(6) can be used to control the opening of the regulating valve; main board 2(2), IP unit 2(4) and position sensor 2(6) can also replace main board 1(1), position sensor 1(5) and IP unit 1(3), that is, the main board 2(2), IP unit 2(4) and position sensor 2(6) can be used to control the opening of the regulating valve. Other situations are similar and will not be described in detail here.

[0041] In another embodiment, referring to Figure 3 The module in the figure indicates that the following connection modes can also be used: the main board 1 (1) is connected to the main board 2 (2) in communication, the main board 1 (1) is connected to the I / P unit 1 (3), the I / P unit 2 (4) and the position sensor 1 (5), the main board 2 (2) is connected to the I / P unit 1 (3), the I / P unit 2 (4) and the position sensor 2 (6), and the I / P unit 1 (3) and the I / P unit 2 (4) are connected to the actuator of the regulating valve (9) through the pressure output interface (8), so that when one or more of the circuit main board 1 (1), the position sensor 1 (5) and the IP unit 1 (3) fails, the valve positioner can enter the backup control state, that is, the main board 2 (2), the IP unit 2 (4) and the position sensor 2 (6) of the backup component control the opening of the regulating valve, so as not to affect normal production. It should be noted that this embodiment is only an example of a connection mode and should not bring any limitation to the function and scope of use of the embodiment of the present application.

[0042] In one embodiment of the present application, the first main board and / or the second main board generates a test control command at a preset interval, and controls the backup component to control the actuator according to the test control command to control the valve opening of the regulating valve.

[0043] In this embodiment, in order to ensure that the main board 2 (2) and the IP unit 2 (4) can work normally when they enter the working state from the backup state, the valve positioner can test the IP unit 2 (4) intake, exhaust and maintenance operation at certain intervals through the menu configuration circuit main board 1 (1) or main board 2 (2).

[0044] In one embodiment of the present application, the second main board matches the first valve position data collected by the first position sensor with a preset valve position range. If the match fails, it is determined that the first position sensor has failed; the second main board obtains the input current, current temperature and stored data of the first main board. If at least one of the input current exceeds the preset current range, the current temperature exceeds the preset temperature range and the stored data verification fails, it is determined that the first main board has failed; the second main board obtains the adjustment time of the first I / P unit. If the adjustment time is greater than the preset time threshold, it is determined that the first I / P unit has failed.

[0045] In one embodiment of the present application, the first main board matches the first valve position data collected by the first position sensor with a preset valve position range. If the match fails, it is determined that the first position sensor is faulty; the first main board obtains the input current, current temperature and stored data of the first main board. If at least one of the input current exceeds the preset current range, the current temperature exceeds the preset temperature range and the stored data verification fails, it is determined that the first main board is faulty; the first main board obtains the adjustment time of the first I / P unit. If the adjustment time is greater than the preset time threshold, it is determined that the first I / P unit is faulty.

[0046] In this embodiment, the first main board or the second main board determines whether the first position sensor fails by judging whether the acquisition code value of the first position sensor is within a specified reasonable range; the first main board or the second main board detects whether the first I / P unit fails to adjust the valve position within a preset time, and if the adjustment time exceeds the preset time threshold, it is determined that the first I / P unit fails; the first main board or the second main board obtains the input current, current temperature and storage data of the first main board, and determines whether the acquisition code value of the input current is within the preset current range, whether the current temperature is within the preset temperature range, and performs data verification on the data in the memory, and determines whether the data verification of the stored data is successful. If at least one of the input current exceeds the preset current range, the current temperature exceeds the preset temperature range, and the data verification of the stored data fails, it is determined that the first main board fails. In this embodiment, the data verification can be a CRC check (Cyclic Redundancy Check).

[0047] In one embodiment of the present application, the valve positioner also includes a human-computer interaction module, which is communicatively connected to the first main board and / or the second main board, and is used to display the first actual valve position percentage and / or the second actual valve position percentage; the human-computer interaction module is used to receive a switching instruction input by a user, and switch the working components according to the switching instruction, and the working components include working components and backup components; the human-computer interaction module is also used to display the status of the valve positioner to prompt the user.

[0048] In this embodiment, continue to refer to Figure 3 As shown, the human-machine interaction module (14) is connected to the main board 1 (1) and the main board 2 (2) in communication, and displays the current valve position percentage of the main board 1 (1) and the main board 2 (2), i.e., the first actual valve position percentage and the second actual valve position percentage, through the display; a test switch is provided on the human-machine interaction module (14), and when the working state of the equipment needs to be tested, the control of the main board 1 (1) or the control of the main board 2 (2) can be switched; a plurality of LED indicators are provided on the human-machine interaction module (14), indicating the current state of the valve positioner, so as to facilitate the user to conduct inspections and to facilitate the user to know whether the valve positioner has a fault. Among them, the human-machine interaction module (14) is an optional module, that is, the human-machine interaction module (14) can be configured or not configured according to the needs.

[0049] In one embodiment of the present application, the first position sensor and the second position sensor are the same type of position sensors or different types of position sensors; the first position sensor and the second position sensor are contact potentiometer position sensors and / or non-contact magnetic induction position sensors.

[0050] In this embodiment, continue to refer to Figure 3 , position sensor 1 (5) and position sensor 2 (6) can be contact potentiometer position sensors or non-contact magnetic induction position sensors; position sensor 1 (5) and position sensor 2 (6) can be the same type of position sensors or different types of position sensors.

[0051] In one embodiment of the present application, the present application further provides a control method for a valve positioner, the valve positioner includes a working component and a backup component, the working component and the backup component include a plurality of identical components, the method includes at least steps S210 to S220, which are described in detail as follows:

[0052] In step S210, the component status of the working component is detected.

[0053] In step S220, if it is detected that at least a part of the working component has failed, at least a part of the working component is replaced by at least a part of the backup component, wherein both the working component and the backup component are connected to the actuator of the regulating valve, and the working component and the backup component are used to control the actuator to control the valve opening of the regulating valve.

[0054] In one embodiment of the present application, the working component includes a first mainboard, a first position sensor and a first I / P unit, and the backup component includes a second mainboard, a second position sensor and a second I / P unit. The first valve position data collected by the first position sensor is matched with the preset valve position range by the first mainboard and / or the second mainboard. If the match fails, it is determined that the first position sensor is faulty; the input current, current temperature and storage data of the first mainboard are obtained. If at least one of the input current exceeds the preset current range, the current temperature exceeds the preset temperature range and the storage data verification fails, it is determined that the first mainboard is faulty; the adjustment time of the first I / P unit is obtained. If the adjustment time is greater than the preset time threshold, it is determined that the first I / P unit is faulty. If it is detected that at least a part of the working component is faulty, at least a part of the working component is replaced by at least a part of the backup component to control the actuator and the valve opening of the regulating valve. The specific replacement process and control process have been described in detail in the above embodiments and will not be repeated here.

[0055] It should be noted that the control method for the valve positioner provided in the above embodiment and the valve positioner provided in the above embodiment belong to the same concept, wherein the specific manner in which the various modules and units corresponding to the various steps perform operations has been described in detail in the above device embodiment, and will not be repeated here. In practical applications, the control method for the valve positioner provided in the above embodiment can be completed by different functional modules according to needs, that is, the internal structure of the device corresponding to the above steps is divided into different functional modules to complete all or part of the functions described above, and this is not limited here.

[0056] Based on the traditional intelligent valve positioner, this application innovatively designs redundant components of the positioner's internal control mainboard, position sensor, and IP unit. During normal operation, one group of components is in working state, and another group of components is in hot backup state. When a system failure occurs, it can be switched to the backup component working state without disturbance, and normal production will not be affected.

[0057] An embodiment of the present application further provides an electronic device, comprising: one or more processors; a storage device for storing one or more programs, wherein when the one or more programs are executed by the one or more processors, the electronic device implements the control method for the valve positioner provided in the above-mentioned embodiments.

[0058] Figure 4 The structure diagram of the computer system suitable for implementing the electronic device of the embodiment of the present application is shown. It should be noted that: Figure 4 The computer system 400 of the electronic device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0059] like Figure 4 As shown, the computer system 400 includes a central processing unit (CPU) 401, which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM) 402 or the program loaded from the storage part 408 to the random access memory (RAM) 403, such as executing the methods provided by the above-mentioned various embodiments. In the RAM 403, various programs and data required for system operation are also stored. The CPU 401, the ROM 402 and the RAM 403 are connected to each other through the bus 404. The input / output (I / O) interface 405 is also connected to the bus 404.

[0060] The following components are connected to the I / O interface 405: an input section 406 including a keyboard, a mouse, etc.; an output section 407 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage section 408 including a hard disk, etc.; and a communication section 409 including a network interface card such as a LAN (Local Area Network) card, a modem, etc. The communication section 409 performs communication processing via a network such as the Internet. A drive 410 is also connected to the I / O interface 405 as needed. A removable medium 411, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 410 as needed so that a computer program read therefrom is installed into the storage section 408 as needed.

[0061] In particular, according to an embodiment of the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present application includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a computer program for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication section 409, and / or installed from a removable medium 411. When the computer program is executed by a central processing unit (CPU) 401, various functions defined in the system of the present application are executed.

[0062] It should be noted that the computer-readable medium shown in the embodiment of the present application can be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium can be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media can include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, wherein a computer-readable computer program is carried. This propagated data signal can take a variety of forms, including but not limited to an electromagnetic signal, an optical signal, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate or transmit a program for use by or in conjunction with an instruction execution system, apparatus or device. A computer program contained on a computer-readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.

[0063] The flowchart and block diagram in the accompanying drawings illustrate the possible architecture, functions and operations of the system, method and computer program product according to various embodiments of the present application. Wherein, each box in the flowchart or block diagram can represent a module, a program segment, or a part of the code, and the above-mentioned module, program segment, or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0064] The units involved in the embodiments described in this application may be implemented by software or hardware, and the units described may also be set in a processor. The names of these units do not, in some cases, constitute limitations on the units themselves.

[0065] Another aspect of the present application also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor of a computer, the computer executes the control method for a valve positioner provided in the above-mentioned embodiments. The computer-readable storage medium may be included in the electronic device described in the above-mentioned embodiments, or may exist independently without being assembled into the electronic device.

[0066] It should be noted that, although several modules or units of the equipment for action execution are mentioned in the above detailed description, this division is not mandatory. In fact, according to the embodiments of the present application, the features and functions of two or more modules or units described above can be embodied in one module or unit. On the contrary, the features and functions of one module or unit described above can be further divided into being embodied by multiple modules or units.

[0067] Another aspect of the present application also provides a computer program product or a computer program, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the control method for a valve positioner provided in each of the above embodiments.

[0068] Through the description of the above implementation methods, it is easy for those skilled in the art to understand that the example implementation methods described here can be implemented by software or by combining software with necessary hardware. Therefore, the technical solution according to the implementation methods of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which can be a personal computer, a server, a touch terminal, or a network device, etc.) to execute the method according to the implementation methods of the present application.

[0069] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the embodiments disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary technical means in the art that are not disclosed in the present application.

[0070] The above embodiments are merely illustrative of the principles and effects of the present application, and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. A valve positioner, characterized in that: It comprises a working part and a backup part, wherein the working part and the backup part comprise a plurality of identical elements; The working component is connected to the actuator of the regulating valve and is used to control the actuator to control the valve opening of the regulating valve; The backup component is connected to the actuator and is used to control the actuator and the valve opening of the regulating valve by replacing at least a part of the working component with at least a part of the backup component if a failure of at least a part of the working component is detected.

2. The valve positioner according to claim 1, characterized in that: The working component includes a first main board, a first position sensor and a first I / P unit, and the backup component includes a second main board, a second position sensor and a second I / P unit.

3. The valve positioner according to claim 2, characterized in that: The first position sensor is connected to the first mainboard, and the first position sensor is used to measure the valve stem position of the regulating valve to obtain first valve position data; The first mainboard is connected to the first I / P unit, and the first mainboard is used to collect the first valve position data, calculate a first actual valve position percentage according to the first valve position data, receive an expected valve position percentage sent by a central control system, and generate a first control instruction based on a comparison result of the first actual valve position percentage and the expected valve position percentage; The first I / P unit controls the actuator to perform intake, exhaust or holding operation according to the first control instruction to control the valve opening of the regulating valve.

4. The valve positioner according to claim 2, characterized in that: The second position sensor is connected to the second main board, and the second position sensor is used to measure the valve stem position of the regulating valve to obtain second valve position data; The second main board is connected to the second I / P unit, and the second main board is used to collect the second valve position data, and calculate the second actual valve position percentage based on the second valve position data, so that when at least a part of the working component fails, the second main board receives the expected valve position percentage sent by the central control system, and generates a second control instruction based on the comparison result of the second actual valve position percentage and the expected valve position percentage, and then controls the second I / P unit to execute the second control instruction.

5. The valve positioner according to claim 2, characterized in that: The first mainboard is communicatively connected with the second mainboard to transmit communication data; The first position sensor is connected to the second mainboard, and the first I / P unit is connected to the second mainboard, so that when the first mainboard fails, the first mainboard can be replaced by at least the second mainboard; The second position sensor is connected to the first mainboard, and the second I / P unit is connected to the first mainboard, so that when the second mainboard fails, the second mainboard can be replaced by at least the first mainboard.

6. The valve positioner according to any one of claims 1 to 5, characterized in that: The first main board and / or the second main board generates a test control command at a preset interval, and controls the backup component to control the actuator and the valve opening of the regulating valve according to the test control command.

7. The valve positioner according to any one of claims 1 to 5, characterized in that: The second mainboard matches the first valve position data collected by the first position sensor with the preset valve position range, and if the matching fails, it is determined that the first position sensor fails; The second mainboard obtains the input current, current temperature and storage data of the first mainboard, and determines that the first mainboard fails if at least one of the input current exceeds a preset current range, the current temperature exceeds a preset temperature range and the storage data verification fails. The second mainboard obtains the adjustment time of the first I / P unit, and if the adjustment time is greater than a preset time threshold, it is determined that the first I / P unit fails.

8. The valve positioner according to any one of claims 1 to 5, characterized in that: The first mainboard matches the first valve position data collected by the first position sensor with the preset valve position range, and if the matching fails, it is determined that the first position sensor fails; The first mainboard acquires the input current, current temperature and storage data of the first mainboard, and determines that the first mainboard fails if at least one of the input current exceeds a preset current range, the current temperature exceeds a preset temperature range and the storage data fails to be verified. The first mainboard obtains an adjustment time of the first I / P unit, and if the adjustment time is greater than a preset time threshold, it is determined that the first I / P unit fails.

9. The valve positioner according to any one of claims 1 to 5, characterized in that: The valve positioner further comprises a human-machine interaction module, the human-machine interaction module is communicatively connected with the first main board and / or the second main board, and the human-machine interaction module is used to display the first actual valve position percentage and / or the second actual valve position percentage; The human-computer interaction module is used to receive a switching instruction input by a user, and switch the working components according to the switching instruction, wherein the working components include the working components and the backup components; The human-machine interaction module is also used to display the status of the valve positioner to prompt the user.

10. A control method for a valve positioner, characterized in that: The valve positioner comprises a working component and a backup component, wherein the working component and the backup component comprise a plurality of identical elements, and the method comprises: detecting a component state of the working component; If it is detected that at least a part of the working component fails, at least a part of the working component is replaced by at least a part of the backup component, wherein the working component and the backup component are both connected to the actuator of the regulating valve, and the working component and the backup component are used to control the actuator to control the valve opening of the regulating valve.

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