CN113175552A - Electric gate valve opening control system and method based on displacement - Google Patents
Electric gate valve opening control system and method based on displacement Download PDFInfo
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- CN113175552A CN113175552A CN202110375749.4A CN202110375749A CN113175552A CN 113175552 A CN113175552 A CN 113175552A CN 202110375749 A CN202110375749 A CN 202110375749A CN 113175552 A CN113175552 A CN 113175552A
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 76
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- 230000003993 interaction Effects 0.000 claims description 9
- 238000012886 linear function Methods 0.000 claims description 6
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- 238000011900 installation process Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 9
- 230000001276 controlling effect Effects 0.000 description 7
- 238000013461 design Methods 0.000 description 3
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- 238000007789 sealing Methods 0.000 description 3
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
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- 238000010586 diagram Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
- F16K37/0041—Electrical or magnetic means for measuring valve parameters
Abstract
The invention relates to the technical field of automatic control, in particular to a displacement-based electric gate valve opening control system and method. The problems that the control mode of the existing electric gate valve is backward and the control precision of the opening degree is low are solved. The system comprises a valve opening sensor based on displacement, a signal processing platform and a computer system. The signal processing platform comprises a signal access module, a main controller module, a network communication interface module and a motor driver module. The computer system provides a control entrance for a user, and specifically comprises an electric gate valve opening control interface, an electric gate valve failure alarm interface and an electric gate valve working log collection interface. The signal processing platform and the valve opening sensor based on the displacement adopt 4-20mA current signal communication, and the signal processing platform and the valve opening sensor based on the displacement use Ethernet communication. The system optimizes the control mode of the electric flashboard valve and realizes the accurate control of the opening.
Description
Technical Field
The invention relates to the technical field of automatic control, in particular to a displacement-based electric gate valve opening control system and method.
Background
The valve is used as a general part industrial product and is generally applied to various industries, such as coal, petroleum, chemical industry, natural gas, power plants, metallurgy and the like. In the field of valve application, the quantity of valves used in coal and machinery industries is large, and various valves are basically used. In all industries, the basic control of the valve is the flow rate, and how to accurately grasp the flow rate has a great influence on production. Currently, electric valves are gradually replacing traditional lead screw threaded valves to replace manual work with machinery, and the conversion greatly improves production efficiency. However, in an actual scenario, the electrically operated valve can only increase the valve action speed, and cannot accurately control the valve opening, which results in that the flow rate in the valve cannot be accurately controlled in actual production. Therefore, with the improvement of the intelligent level of each industry in China, how to accurately control the opening of the electric gate valve in real time becomes more and more important.
The electric gate valve is one of plate valves, and the electric regulating valve adopts various types of internal parts, so that the application range of the valve can be enlarged. The valve is provided with a channel with full drift diameter, which is equal to a smooth pipeline, and has large flow capacity and small flow resistance; the double upstream and downstream sealing is realized, a lubricating sealing part is not needed, the sealing performance is good, and the reliability is high; has less parts; the valve has novel design, meets the technological requirements of pipelines, meets the requirements of users on operation and maintenance simplicity, and can ensure long-term and reliable operation of the valve. The electric gate valve generally comprises a driving motor and a gate, and in production, the motor drives the gate to move to finally realize flow control. According to the structural characteristics of the electric gate valve, the opening control of the valve can be realized according to the position of the gate.
Disclosure of Invention
The invention aims to solve the problems that the existing electric gate valve control mode is backward and the opening control precision is low, and provides a displacement-based electric gate valve opening control system and method. The system and the method improve the control mode of the electric flashboard valve and realize the accurate control of the opening.
In order to achieve the purpose of the invention, the invention adopts the following technical scheme:
a displacement-based electric gate valve opening control system comprises a displacement-based valve opening sensor, a signal processing platform and a computer system, wherein the displacement-based valve opening sensor and the signal processing platform are connected by a multi-core cable and are communicated and powered by adopting a three-wire system 4-20mA current signal; the computer system and the signal processing platform are connected by optical fiber and adopt an Ethernet communication mode; the signal processing platform and the electric flashboard valve body are connected through a multi-core cable, and a three-phase five-wire system power supply mode is adopted.
Preferably, the signal processing platform comprises a signal access module, a main controller module, a network communication interface module and a motor driver module. The signal access module is used for converting a 4-20mA current signal accessed by the valve opening sensor based on the displacement into a digital quantity through an analog-to-digital conversion circuit so as to be processed by the main controller module; the main controller module adopts a single chip microcomputer controller as a core and takes serial port communication as an interactive mode; the network communication interface module is used for converting serial port signals output by the main controller module into network signals so as to be convenient for communication with a computer system; the motor driving module and the main controller module use relay signals as an interaction mode, and the main controller module controls the intermediate relay to act, so that the motor driving module is finally prompted to supply power to the three-phase asynchronous motor of the electric flashboard valve. The function of controlling strong current by weak current is realized.
Preferably, the computer system comprises a complete set of user interaction systems. The user interaction system includes: the system comprises an electric gate valve opening control interface, an electric gate valve fault alarm interface and an electric gate valve working log collection interface. Wherein, the electric gate valve door opening control interface is mainly responsible for: the method comprises the steps of establishing network connection with a network communication interface module in a signal processing platform, reading current opening information of an electric flashboard valve and current data of the electric flashboard valve during operation from the signal processing platform, sending the current opening percentage of the electric flashboard valve needing to be set to the signal processing platform, determining that alarm is needed when the current value of the electric flashboard valve exceeds a warning value, transmitting an alarm signal to an electric flashboard valve fault alarm interface, and sending an operation record of each step to an electric flashboard valve working log collection interface. The electric gate valve fault alarm interface is responsible for communicating with the electric gate valve opening control interface, and displays the fault alarm information sent by the electric gate valve fault alarm interface, so that an effective means is provided for a post driver to evaluate the running state of the equipment. The electric gate valve working log collecting interface is in charge of communicating with the electric gate valve opening control interface, recording each step of action through a hook function, and finally displaying the action in a report form.
The invention relates to a displacement-based electric gate valve opening control method, which is realized by adopting a displacement-based electric gate valve opening control system and is used for detecting the opening of an electric gate valve and controlling the opening of the electric gate valve through a given value; simultaneously, the fault alarm information and the operation log of the electric flashboard valve are recorded, and the operation steps are as follows:
step 1, determining the installation position of an electric gate valve opening control system based on displacement according to the actual working condition of an electric gate valve;
Preferably, the step 1 specifically comprises the following steps:
step 1.1, determining the installation position of a valve opening sensor based on displacement according to the actual installation position of an electric flashboard valve, and ensuring that the maximum value and the minimum value of the displacement of the valve opening sensor based on the displacement are within the action range of the valve;
step 1.2, determining the installation position of a signal processing platform according to the condition of a workshop where the electric flashboard valve is located; care needs to be taken during installation: the signal processing platform needs to make a ground protection measure and a signal shielding measure, and the signal wire routing position between the signal processing platform and the valve opening sensor based on the displacement needs to avoid high voltage and electromagnetic interference as much as possible;
and step 1.3, performing function verification and calibration on each module in the signal processing platform.
Preferably, the step 2 specifically comprises the following steps:
step 2.1, according to design requirements, the measurement range of the valve opening sensor based on the displacement is as follows: 0-L. At this time, the corresponding current output is 4-20mA, but in an actual production environment, due to the limitation of the opening of the electric gate valve or due to the installation error of the valve opening sensor based on the displacement, the actual measurement range is finally caused to be: [ L ]min,Lmax]And are to satisfy
According to the measured LminAnd LmaxIt is possible to obtain the output current range [ I ] of the valve opening sensor based on the displacement amountmin,Imax]；
Step 2.2, determining the analog-digital sampling precision 2 of the system according to the analog-digital sampling digit N of the signal access moduleN. Finally, the digital quantity OUT output by the signal access module to the main controller module is:
however, in practical use, considering the problems of long-distance transmission of signals and anti-interference characteristics of signals, the signal access module cannot directly acquire displacement signals and needs to acquire current signals, so at this time, OUTnewComprises the following steps:
step 2.3, the main controller module OUT according to the inputnewThe current opening value Pactual displacement L of the electric flashboard valve can be calculated:
L＝P×(Lmax-Lmin)
preferably, the step 3 specifically comprises the following steps:
step 3.1, removing current input obviously not conforming to the actual situation according to the input range of the current, and when the input current I is larger than ImaxOr I < IminWhen the current value is input, directly discarding the input current value;
step 3.2, since the shutter operation displacement of the electric shutter valve can be approximately considered as a linear function of time, the current value output by the valve opening sensor based on the displacement amount should also be uniformly changed, so that the following filtering algorithm is designed according to the time characteristics of the two:
a. setting a fixed sampling time Ti；
b. According to the sampling time TiSampling a plurality of groups of current output values: i is1,I2,I3......In；
c. Performing linear function fitting on the multiple groups of current output values and sampling time to finally obtain a slope K;
d. determining a compensation constant D according to the actual working environment on site;
e. determining the allowable slope range: K-D is less than or equal to Kreal≤K+D
And 3.3, determining the standard slope K and the compensation constant D in the debugging stage, and setting the standard slope K and the compensation constant D to the main controller module. In the operation process, the last historical value of the current value is recorded, and after a new value enters every time, the actual slope K is calculated firstlyrealWhen the actual slope KrealAnd after the requirements are met, updating the historical value and using the historical value for calculation, and otherwise, discarding the current value.
Preferably, the step 4 specifically comprises the following steps:
and 4.1, because some uncertain factors can influence the system control, the misoperation or control failure of the electric flashboard valve is caused, generally the long-time back-and-forth action of the flashboard of the electric flashboard valve or the locked rotor of the three-phase asynchronous motor of the electric flashboard valve is shown, and therefore protective measures are set in the system. On one hand, during debugging, the time consumed by the electric flashboard valve from full opening to full closing is determined, and the time is determined as a time threshold value TtopOn the other hand, during debugging, the armature current at the time of stalling of the three-phase asynchronous motor of the electric flashboard valve is detected and set as the current threshold value Itop。
And 4.2, after the opening degree value of the electric gate valve is set through an opening degree control interface of the electric gate valve in the computer system by a user, driving the motor driver module to act by the signal processing platform, and finally realizing the opening degree change of the electric gate valve. In the operation process, when the signal processing platform detects that the actual operation time exceeds the time threshold TtopOr armature current of three-phase asynchronous motor of electric flashboard valve exceeds current threshold ItopAnd then, protecting, disconnecting the circuit and giving an alarm.
Compared with the prior art, the invention has the following obvious prominent substantive characteristics and obvious advantages:
1. the displacement-based electric gate valve opening control system solves the problems of backward control mode and low opening control precision of the conventional electric gate valve, can realize remote opening and closing and opening control of the electric gate valve, and can effectively improve the production efficiency of industrial production environment and the working efficiency of personnel
2. The scheme of the invention has convenient control mode and high control precision, can be used for controlling the traditional electric flashboard valve and can also be applied to other electric valves taking strokes as control objects; the system of the invention has simple structure and is easy to realize.
Drawings
Fig. 1 is a schematic structural diagram of a displacement-based electric gate valve opening control system according to the present invention.
As shown in the figure: the system comprises a displacement-based valve opening sensor, a 2-signal processing platform, a 3-signal access module, a 4-main controller module, a 5-network communication interface module, a 6-motor driver module and a 7-computer system.
Detailed Description
The technical solution in the preferred embodiment of the present invention is clearly and completely described below with reference to the accompanying drawings.
Example one
In the embodiment, a structure of a displacement-based opening control system of an electric gate valve is shown in fig. 1. The device comprises a valve opening sensor 1 based on displacement, a signal processing platform 2 and a computer system 7. The valve opening sensor 1 based on the displacement and the signal processing platform 2 are connected by a multi-core cable, and three-wire system 4-20mA current signal communication and power supply are adopted. The computer system 7 and the signal processing platform 2 are connected by optical fiber and adopt an Ethernet communication mode. The signal processing platform 2 is connected with the electric flashboard valve body through a multi-core cable, and a three-phase five-wire system power supply mode is adopted. The system has simple structure, can carry out remote on-off control and opening control on the traditional electric flashboard valve, and is easy to realize.
Example two
This embodiment is substantially the same as the first embodiment, and is characterized in that:
in this embodiment, the signal processing platform 2 includes a signal access module 3, a main controller module 4, a network communication interface module 5, and a motor driver module 6. The signal access module 3 is used for converting a 4-20mA current signal accessed by the valve opening sensor 1 based on the displacement into a digital quantity through an analog-to-digital conversion circuit so as to be processed by the main controller module 4; the main controller module 4 adopts a single chip microcomputer controller as a core and takes serial port communication as an interactive mode; the network communication interface module 5 is used for converting the serial port signal output by the main controller module 4 into a network signal so as to be convenient for communication with the computer system 7; the motor driving module 6 and the main controller module 4 use relay signals as an interactive mode, the main controller module 4 controls the action of the intermediate relay, and finally the motor driving module 6 is prompted to supply power to a three-phase asynchronous motor of the electric flashboard valve, so that the function of controlling strong current by weak current is realized.
In this embodiment, the computer system 7 comprises a complete set of user interaction systems. The user interaction system includes: the system comprises an electric gate valve opening control interface, an electric gate valve fault alarm interface and an electric gate valve working log collection interface. Wherein, the electric gate valve door opening control interface is mainly responsible for: the method comprises the steps of establishing network connection with a network communication interface module 5 in a signal processing platform 2, reading opening information of a current electric flashboard valve and current data of the electric flashboard valve in operation from the signal processing platform 2, sending the opening percentage of the current electric flashboard valve which needs to be set to the signal processing platform 2, determining that alarm is needed when the current value of the electric flashboard valve exceeds a warning value, transmitting an alarm signal to an electric flashboard valve fault alarm interface, and sending operation records of each step to an electric flashboard valve working log collection interface. The electric gate valve fault alarm interface is responsible for communicating with the electric gate valve opening control interface, and displays the fault alarm information sent by the electric gate valve fault alarm interface, so that an effective means is provided for a post driver to evaluate the running state of the equipment. The electric gate valve working log collecting interface is in charge of communicating with the electric gate valve opening control interface, recording each step of action through a hook function, and finally displaying the action in a report form.
EXAMPLE III
In this embodiment, a displacement-based electric gate valve opening control method is implemented by using the displacement-based electric gate valve opening control system, and is used for detecting the opening of an electric gate valve and controlling the opening of the electric gate valve by a given value. Simultaneously, record the fault alarm information and the operation log of the electric flashboard valve, and is characterized in that the operation steps are as follows:
step 1, determining the installation position of an electric gate valve opening control system based on displacement according to the actual working condition of an electric gate valve;
step 1.1, determining the installation position of a valve opening sensor based on displacement according to the actual installation position of an electric flashboard valve, and ensuring that the maximum value and the minimum value of the displacement of the valve opening sensor based on the displacement are within the action range of the valve;
step 1.2, determining the installation position of a signal processing platform according to the condition of a workshop where the electric flashboard valve is located; care needs to be taken during installation: the signal processing platform needs to make a ground protection measure and a signal shielding measure, and the signal wire routing position between the signal processing platform and the valve opening sensor based on the displacement needs to avoid high voltage and electromagnetic interference as much as possible;
step 1.3, performing function verification and calibration on each module in the signal processing platform;
step 2.1, according to design requirements, the measurement range of the valve opening sensor based on the displacement is as follows: 0-L; the corresponding current output is 4-20mA, but in the actual production environment, the actual measurement can be finally caused due to the limitation of the opening of the electric gate valve or the installation error of the valve opening sensor based on the displacementThe range is: [ L ]min,Lmax]And are to satisfy
According to the measured LminAnd LmaxThe output current range [ I ] of the valve opening sensor based on the displacement amount can be obtainedmin,Imax]；
Step 2.2, determining the analog-digital sampling precision 2 of the system according to the analog-digital sampling digit N of the signal access moduleN(ii) a Finally, the digital quantity OUT output by the signal access module to the main controller module is:
however, in practical use, considering the problems of long-distance transmission of signals and anti-interference characteristics of signals, the signal access module cannot directly acquire displacement signals and needs to acquire current signals, so at this time, OUTnewComprises the following steps:
step 2.3, the main controller module OUT according to the inputnewThe current opening value Pactual displacement L of the electric flashboard valve can be calculated:
L＝P×(Lmax-Lmin)
step 3.1, removing current input obviously not conforming to the actual situation according to the input range of the current, and when the input current I is larger than ImaxOr I < IminWhen the current value is input, directly discarding the input current value;
step 3.2, since the shutter operation displacement of the electric shutter valve can be approximately considered as a linear function of time, the current value output by the valve opening sensor based on the displacement amount should also be uniformly changed, so that the following filtering algorithm is designed according to the time characteristics of the two:
a. setting a fixed sampling time Ti；
b. According to the sampling time TiSampling a plurality of groups of current output values: i is1,I2,I3......In；
c. Performing linear function fitting on the multiple groups of current output values and sampling time to finally obtain a slope K;
d. determining a compensation constant D according to the actual working environment on site;
e. determining the allowable slope range: K-D is less than or equal to Kreal≤K+D；
And 3.3, determining the standard slope K and the compensation constant D in the debugging stage, and setting the standard slope K and the compensation constant D to the main controller module. In the operation process, the last historical value of the current value is recorded, and after a new value enters every time, the actual slope K is calculated firstlyrealWhen the actual slope KrealAfter the requirements are met, updating the historical value and using the historical value for calculation, otherwise, discarding the current value;
step 4.1, because some uncertain factors can influence the system control, the misoperation or control failure of the electric flashboard valve is caused, generally expressed as long-time back-and-forth action of the flashboard of the electric flashboard valve or the locked rotor of a three-phase asynchronous motor of the electric flashboard valve, and protective measures are set in the system; on the one hand, during debugging, the time spent by the electric flashboard valve from full opening to full closing is determined, and the time is determined as a time thresholdValue TtopOn the other hand, during debugging, the armature current at the time of stalling of the three-phase asynchronous motor of the electric flashboard valve is detected and set as the current threshold value Itop。
4.2, after the opening degree value of the electric gate valve is set through an opening degree control interface of the electric gate valve in the computer system by a user, driving a motor driver module to act by a signal processing platform, and finally realizing the opening degree change of the electric gate valve; in the operation process, when the signal processing platform detects that the actual operation time exceeds the time threshold TtopOr armature current of three-phase asynchronous motor of electric flashboard valve exceeds current threshold ItopAnd then, protecting, disconnecting the circuit and giving an alarm.
To this end, the opening degree control of the electric shutter valve is completed from step 1 to step 4.
The electric gate valve opening control method based on the displacement solves the problems that an existing electric gate valve is backward in control mode and low in opening control precision, can achieve remote opening and closing and opening control of an electric gate valve, and can effectively improve production efficiency of industrial production environment and working efficiency of personnel. The control mode of the embodiment is convenient, the control precision is high, and the electric valve can be used for controlling the traditional electric flashboard valve and can also be suitable for other electric valves taking the stroke as a control object.
In summary, the above embodiment of the invention provides the displacement-based electric gate valve opening control method and the displacement-based electric gate valve opening control method, which solve the problems of laggard control mode and low opening control precision of the existing electric gate valve. The system comprises a valve opening sensor based on displacement, a signal processing platform and a computer system. The signal processing platform comprises a signal access module, a main controller module, a network communication interface module and a motor driver module. The computer system comprises a complete set of user interaction systems. The user interaction system includes: the system comprises an electric gate valve opening control interface, an electric gate valve fault alarm interface and an electric gate valve working log collection interface. The system disclosed by the invention realizes remote opening and closing and opening control of the electric flashboard valve, and can effectively improve the production efficiency of an industrial production environment and the working efficiency of personnel. The scheme has the advantages of convenient control mode and high control precision, can be used for controlling the traditional electric flashboard valve, and can also be applied to other electric valves taking strokes as control objects.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications or substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. The utility model provides an electronic slide valve door opening control system based on displacement volume, includes valve opening sensor (1), signal processing platform (2) and computer system (7) based on the displacement volume, its characterized in that:
the valve opening sensor (1) based on the displacement is connected with the signal processing platform (2) by using a multi-core cable, and three-wire system 4-20mA current signal communication and power supply are adopted; the computer system (7) is connected with the signal processing platform (2) by adopting an optical fiber and an Ethernet communication mode is adopted; the signal processing platform (2) is connected with the electric flashboard valve body through a multi-core cable, and a three-phase five-wire system power supply mode is adopted.
2. The electric gate valve opening degree control system based on the displacement amount according to claim 1, characterized in that: the signal processing platform (2) comprises a signal access module (3), a main controller module (4), a network communication interface module (5) and a motor driver module (6); the signal access module (3) converts a 4-20mA current signal accessed by the valve opening sensor (1) based on the displacement into a digital quantity through an analog-to-digital conversion circuit, and the digital quantity is used for processing by the main controller module (4); the main controller module (4) adopts a single chip microcomputer controller as a core and takes serial port communication as an interactive mode; the network communication interface module (5) is used for converting serial port signals output by the main controller module (4) into network signals and communicating with the computer system (7); the motor driving module (6) and the main controller module (4) use relay signals as an interactive mode, and the main controller module (4) controls the intermediate relay to act, so that the motor driving module (6) supplies power to a three-phase asynchronous motor of the electric flashboard valve.
3. The electric gate valve opening degree control system based on the displacement amount according to claim 1, characterized in that: the computer system (7) comprises a user interaction system, and the user interaction system comprises an electric gate valve opening control interface, an electric gate valve failure alarm interface and an electric gate valve working log collection interface; wherein, the electric gate valve door opening control interface is mainly responsible for: establishing a network link with a network communication interface module (5) in the signal processing platform (2), reading the current opening information of the electric flashboard valve and current data of the electric flashboard valve during operation from the signal processing platform (2), and sending the current opening percentage of the electric flashboard valve to be set to the signal processing platform (2); when the current value of the electric flashboard valve exceeds the warning value, the electric flashboard valve is determined to be required to be warned, a warning signal is transmitted to a fault warning interface of the electric flashboard valve, and the operation record of each step is sent to a working log collecting interface of the electric flashboard valve; the electric gate valve fault alarm interface is responsible for communicating with the electric gate valve opening control interface and displaying the fault alarm information sent by the electric gate valve fault alarm interface, so that an effective means is provided for a post driver to evaluate the running state of the equipment; the electric gate valve working log collection interface is in charge of communicating with the electric gate valve opening control interface, recording each step of action through a hook function, and displaying in a report form.
4. A displacement-based electric gate valve opening control method, which is implemented by using the displacement-based electric gate valve opening control system of claim 1, and is used for detecting the opening of an electric gate valve, controlling the opening of the electric gate valve by a given value, and simultaneously recording fault alarm information and an operation log of the electric gate valve, and is characterized in that the operation steps are as follows:
step 1, determining the installation position of the system according to claim 1 according to the actual working condition of an electric flashboard valve;
step 2, calibrating an output signal of the valve opening sensor (1) based on the displacement to enable the output range to meet the requirement of a 4-20mA current signal, and calculating the actual opening value of the electric flashboard valve;
step 3, filtering output signals of the valve opening sensor (1) based on the displacement, and removing error numerical values caused by signal mutation by using a filtering algorithm;
step 4, determining the working time threshold T of the electric flashboard valve according to the actual working range of the electric flashboard valvetopAnd maximum current I when the three-phase asynchronous motor is lockedtopWhen the working time exceeds the threshold value TtopOr the operating current is greater than ItopAnd when the system needs to perform protection action, and a fault alarm is sent out.
5. The method for controlling the opening degree of the electric gate valve according to claim 4, wherein the step 1 specifically comprises the following steps:
step 1.1, determining the installation position of a valve opening sensor (1) based on displacement according to the actual installation position of the electric flashboard valve, and ensuring that the maximum value and the minimum value of the displacement of the valve opening sensor (1) based on the displacement are within the action range of the valve;
step 1.2, determining the installation position of the signal processing platform (2) according to the condition of a workshop where the electric flashboard valve is located; in the installation process, a signal processing platform (2) takes protective ground measures and signal shielding measures, and the signal wire routing position between the signal processing platform (2) and the valve opening sensor (1) based on the displacement needs to avoid high voltage and electromagnetic interference as much as possible;
and step 1.3, performing function verification and calibration on each module in the signal processing platform (2).
6. The method for controlling the opening degree of the electric gate valve based on the displacement according to claim 4, wherein the step 2 specifically comprises the following steps:
2.1, measuring the range of the valve opening sensor (1) based on the displacement amount to be 0-L; the corresponding current output at this time is 4-20mA, and the measurement range is: [ L ]min,Lmax]And satisfy
According to the measured LminAnd LmaxObtaining a displacement-based output current range [ I ] of a valve opening sensor (1)min,Imax]；
Step 2.2, determining the analog-digital sampling precision 2 of the system according to the analog-digital sampling digit N of the signal access module (3)NAnd finally, the digital quantity OUT output to the main controller module (4) by the signal access module (3) is as follows:
OUTnewcomprises the following steps:
step 2.3, the main controller module (4) outputs according to the inputnewAnd calculating the current opening value P actual displacement L of the electric flashboard valve:
L＝P×(Lmax-Lmin)。
7. the method for controlling the opening degree of the electric gate valve based on the displacement according to claim 4, wherein the step 3 specifically comprises the following steps:
step 3.1, removing current input obviously not conforming to the actual situation according to the input range of the current, and when the input current I is larger than ImaxOr I < IminWhen the current value is input, directly discarding the input current value;
3.2, because the operation displacement of the gate plate of the electric gate plate valve is approximately regarded as a linear function of time, the current value output by the valve opening sensor (1) based on the displacement also needs to be uniformly changed, and the following filtering algorithm is designed according to the time characteristics of the two:
a. setting a fixed sampling time Ti；
b. According to the sampling time TiSampling a plurality of groups of current output values: i is1,I2,I3......In；
c. Performing linear function fitting on the multiple groups of current output values and sampling time to finally obtain a slope K;
d. determining a compensation constant D according to the actual working environment on site;
e. determining the allowable slope range: K-D is less than or equal to Kreal≤K+D；
Step 3.3, determining the standard slope K and the compensation constant D in the debugging stage, setting the standard slope K and the compensation constant D to the main controller module (4), recording the last historical value of the current value in the running process, and firstly calculating the actual slope K after a new value enters every timerealWhen the actual slope KrealAnd after the requirements are met, updating the historical value and using the historical value for calculation, and otherwise, discarding the current value.
8. The method for controlling the opening degree of the electric gate valve based on the displacement according to claim 4, wherein the step 4 specifically comprises the following steps:
step 4.1, setting protective measures in the opening control system of the electric gate valve; when debugging, determining the time consumed by the electric flashboard valve from full opening to full closing, and determining the time as a time threshold value TtopAnd detecting the armature current of the three-phase asynchronous motor of the electric flashboard valve during the locked rotor during debugging, and setting the armature current as the current threshold valueItop；
4.2, after the opening degree value of the electric gate valve is set through an opening degree control interface of the electric gate valve in the computer system (7) by a user, the signal processing platform (2) drives the motor driver module (6) to act to realize the opening degree change of the electric gate valve; in the process of re-operation, when the signal processing platform (2) detects that the actual operation time exceeds the time threshold TtopOr armature current of three-phase asynchronous motor of electric flashboard valve exceeds current threshold ItopAnd then, protecting, disconnecting the circuit and giving an alarm.
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Cited By (1)
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| CN117262784A (en) * | 2023-03-21 | 2023-12-22 | 太原易思软件技术有限公司 | Device, method and system for controlling opening and closing degree of material opening |
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