CN115899352A - Automatic compensation correction and over-torque protection control device for valve position of electric regulating valve - Google Patents
Automatic compensation correction and over-torque protection control device for valve position of electric regulating valve Download PDFInfo
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Abstract
The invention relates to an automatic compensation correction and over-moment protection control device for a valve position of an electric regulating valve, which comprises a DCS valve position main control system, a DCS valve position compensation correction control system and an over-moment protection control system, wherein the DCS valve position main control system is connected with the electric regulating valve through a cable in a feedback signal manner, the DCS valve position main control system is connected with a command signal relay switching device through a cable in a command signal manner, a command signal is continuously output through a normally closed contact inside the relay switching device and is connected with the input end of a command signal distributor through a cable, and the first output end of the command signal distributor is in command connection with the electric regulating valve through a cable; the input end of the DCS valve position compensation correction control system is connected with the second output end of the instruction signal distributor through a cable, the scheme realizes that the opening degree of the automatically controlled valve is infinitely close to the same degree with the instruction signal, the valve position control is accurate and reliable, and the stable and smooth production is fully ensured.
Description
Technical Field
The invention relates to a control device, in particular to an automatic valve position compensation correction and over-torque protection control device for an electric regulating valve, and belongs to the technical field of control of electric regulating valves.
Background
At present, thermal power generation and waste heat power generation of Mei Gang thermal power plants and medium control of production process pipelines of blast furnace fans mainly depend on electric regulating valve equipment, remote closed-loop control of field valve opening is realized through a DCS automatic control system, and pressure, flow and flow direction control is performed on the medium of the production process pipelines; however, the problem is that no matter open-loop or closed-loop control is adopted, certain error exists after the execution mechanism runs for a long time with a feedback mechanism, and after the control system sends an opening command, certain deviation exists between an actual valve position and the command. The technology mainly aims at the deviation between the field actual valve position of the regulating valve and a control instruction after the control system completes closed-loop control, and eliminates the deviation between the actual valve position and the control instruction through an automatic valve position compensation correction control method, thereby ensuring that the control accuracy is improved. Particularly, after the electric regulating valve is out of service for a long time, medium pressure difference between the front and the rear of the valve is very easy to occur, when the electric remote control operation valve acts, the existing torque of an actuating mechanism cannot normally start the valve, the valve needs to be manually started through a rocking handle in a manual field, personal injury is very easy to cause in a high-temperature and high-pressure control process environment, and the danger is high.
Searching for new through Vipu search, at present, most domestic electric regulating valves for production process control and regulation are in open-loop or closed-loop feedback control, and on-site valve opening for control result reaction is transmitted to an upper computer such as DCS or PLC through a feedback mechanism to convert standard signals and then is subjected to closed-loop control; through retrieval, no secondary accurate detection is carried out on the opening of the valve, or a related technical source for further adjusting the opening of the valve to be accurate and consistent with the instruction is available. Through further retrieval, no good solution is provided for the fault that the valve cannot be normally opened due to large differential pressure before and after the regulating valve is started in China.
Therefore, it is necessary to invent a control device and a control method for secondary detection and correction of the actual opening of the electric control valve, and to design a method for solving the problem of burning of the servo motor due to difficulty in opening the electric control valve and insufficient torque of the actuator.
Disclosure of Invention
The invention provides a control device for automatic compensation and correction of valve position and over-moment protection of an electric regulating valve aiming at the problems in the prior art. Meanwhile, the front and back pressure difference balance of the control valve is detected on line through the torque or the motor driving power supply is cut off to protect the servo motor of the actuating mechanism from potential safety hazards of over-torque coil burning loss.
In order to achieve the purpose, the technical scheme of the invention is that the device comprises a DCS valve position main control system, a DCS valve position compensation correction control system and an over-torque protection control system, wherein the DCS valve position main control system is connected with an electric regulating valve through a cable in a feedback signal mode, the DCS valve position main control system is connected with a command signal relay switching device through a cable in a command signal mode, a command signal is continuously output inside the relay switching device through a normally closed contact and is connected with the input end of a command signal distributor through a cable, and the first path of output end of the command signal distributor is in command connection with the electric regulating valve through a cable; the input end of the DCS valve position compensation correction control system is connected with the second output end of the command signal distributor through a cable, the feedback input end of the DCS valve position compensation correction control system is directly connected with the output end of the laser range finder through a cable, the output end of the DCS valve position compensation correction control system is connected with the command signal relay switching device through a cable, and the relay switching device is internally connected with the input end of the command signal distributor through a normally open contact. The DCS valve position main control system comprises an accepted feedback signal of the electric control valve, and a command signal which is output through comparison in the DCS is output to the signal distributor through a normally closed point of the relay switching device and then is output to a control loop of the electric control valve to control the action of the valve through the signal distributor; the DCS valve position compensation correction control system comprises a received laser range finder feedback signal; the received master control instruction feedback signal from the instruction signal distributor; and the two feedback signals are compared in the DCS to obtain a deviation, then a valve position correction signal is output to the signal distributor through the normally-open point of the relay switching device, and then the correction signal is output to a control loop for controlling the accurate adjustment of the valve by the electric control valve through the signal distributor.
As an improvement of the invention, the over-torque protection control system comprises a torque control device, a torque detector, a differential pressure balance electric control valve, a valve back pressure measuring point, a valve front pressure measuring point and a driving power supply, wherein a valve actual scale indicating rod is additionally arranged at a valve core action connecting rod of the on-site electric control valve, a laser range finder is fixedly arranged below the valve actual scale indicating rod, the torque detector is additionally arranged at an action stroke mechanism at the other end of the electric control valve, the output end of the torque detector is connected with the input end of the torque control device through a cable, the first output end of the torque control device is connected with a differential pressure balance electric control valve coil through a cable, the second output end of the torque control device is connected with the driving power supply of the electric control valve through a cable, and the driving power supply is in on-off connection with an actuator motor through a cable.
As an improvement of the invention, a front pipeline of a valve body of the electric control valve is additionally provided with a front valve pressure measuring point, a rear pipeline is additionally provided with a rear valve pressure measuring point, a differential pressure balancing pipeline is additionally arranged between the front valve pipeline and the rear valve pipeline, and a differential pressure balancing electric control valve is additionally arranged in the middle of the differential pressure balancing pipeline. Before the valve is normally opened on line, due to the determination of the medium flowing direction, theoretically, the pressure before the valve is larger than the pressure after the valve, namely P1> P2, and the moment for opening the valve mainly overcomes the differential pressure delta P = P1-P2 before and after the valve. The torque detector detects the driving torque value of the motor of the electric regulating valve on line, the torque control device receives the measured value of the torque sensor and compares the measured value with a first-order set value SP1, when the measured value is larger than the set value SP1, a control signal is output to drive the pressure difference balance electric control valve to be opened, so that the pressure P1 before the valve and the pressure P2 after the valve tend to be balanced, the pressure difference before the valve and the pressure difference after the valve are equal to the maximum extent, and the valve can be normally opened.
In the technical scheme, the control method comprises the following steps:
1) After receiving the feedback signal input of the on-site electric control valve, the DCS valve position main control system sends a control command through comparison output, enters the command signal distributor through the normally closed contact of the command signal relay switching device, outputs a corresponding control signal through the command signal distributor to drive the electric control valve to act so as to complete the closed-loop control of the valve,
2) The DCS compensation correction control system carries out secondary comparison on the main control instruction current signal and an actual valve position current signal acquired by the field laser range finder, outputs a correction current signal to the relay switching device, at the moment, the DCS compensation correction control system immediately sends a switching signal to a coil of the relay switching device to be electrified, a normally closed contact inside the relay switching device is normally opened, a normally open contact is closed, namely, the compensation correction current signal enters the instruction signal distributor through the contact of the relay switching device and outputs a control signal to the electric regulating valve to carry out accurate control of valve position compensation correction,
3) Before the electric regulating valve is started, because the pressure before the valve is always greater than the pressure after the valve, namely P1 is greater than P2, pressure difference is generated before and after the valve, so that the valve cannot be normally started, at the moment, the torque control device receives a torque value measured on site by a torque sensor as a feedback signal, and simultaneously, the torque value is compared with a set value SP1, and the torque value is greater than the first-order set value SP1, so that the pressure difference balance electric control valve is driven to act and open, the pressure difference before and after the electric regulating valve tends to be balanced, the starting pressure is reduced, and the valve is convenient to normally open; and if the torque measured value is continuously greater than the second-order set value SP2, immediately controlling to cut off the actuator driving power supply so as to protect the servo motor coil of the electric regulating valve from being burnt by excessive torque action.
Compared with the prior art, the invention has the advantages that 1) the technical scheme accurately measures the actual feedback scale through the laser secondary detection of the actual valve position and converts the actual feedback scale into a control signal through a control system to compensate, correct and control the output; 2) The scheme designs a control method for automatically correcting, compensating and correcting the valve position control deviation, and further realizes the automatic switching of a main control signal and a correction signal through a relay switching device to realize the accurate control of a controlled valve; 3) The torque control device of the electric control valve is designed, the torque is measured on line, the front and back pressure difference balance of the valve is controlled, a driving power supply is further linked, and the motor safety of an electric valve actuating mechanism is fully protected. The torque control device measures the torque value of the motor on line, and the differential pressure balance valve is linked in the first step, so that the starting differential pressure of the valve is reduced, and the valve is convenient to open; and the second step is to link the motor driving power supply loop of the actuating mechanism, and immediately cut off the motor driving power supply of the actuating mechanism when the danger set value SP2 is exceeded. If the motor continuously acts with excessive moment, the valve does not respond, the valve rod of the valve can be mechanically broken, and the medium leaks; the motor coil is burnt out in an overload way, so that fire accidents are caused. The power switch is tripped by short circuit, large-area power skipping is caused, and accidents are enlarged. The scheme solves the problems by driving the power switch loop through the over-moment linkage. The accident of valve rod fracture medium leakage caused by continuous over-torque action of the motor can be avoided. The overload burning loss of the motor coil can be avoided, and the occurrence of fire accidents is avoided. The condition that the power switch is in short-circuit tripping to cause large-area power tripping of a control system and cause accident enlargement can be avoided.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an automatic valve position compensation and correction and over-torque protection control device;
fig. 2 is a schematic block diagram of valve position automatic compensation correction control and torque protection control.
In the figure: 1. the device comprises a driving power supply, 2, a DCS valve position main control system, 3, a command signal relay switching device, 4, a command signal distributor, 5, an actuator motor, 6, a valve actual scale indication device, 7, an electric regulating valve, 8, a torque detector, 9, a torque control device, 10, a laser range finder, 11, a valve back pressure measuring point, 12, a differential pressure balance electric control valve, 13, a valve front pressure measuring point, 14 and a DCS valve position compensation correction control system.
The specific implementation mode is as follows:
for the purpose of promoting an understanding of the present invention, reference will now be made in detail to the present embodiments of the invention, examples of which are illustrated in the accompanying drawings.
Example 1: referring to fig. 1 and 2, the device comprises a DCS valve position main control system 2, a DCS valve position compensation correction control system 14 and an over-torque protection control system, wherein the DCS valve position main control system 2 is connected with an electric control valve 7 through a cable for feedback signal, the DCS valve position main control system 2 is connected with a command signal relay switching device 3 through a cable for command signal connection, a normally closed contact is arranged in the relay switching device 3 for continuously outputting a command signal, and the command signal distributor 4 is connected with an input end of a command signal distributor 4 through a cable, and a first output end of the command signal distributor 4 is connected with the electric control valve 7 through a cable for command connection; the input end of the DCS valve position compensation correction control system 14 is connected to the second output end of the command signal distributor 4 through a cable, the feedback input end thereof is directly connected to the output end of the laser range finder 10 through a cable, the output end thereof is connected to the command signal relay switching device 3 through a cable, and the relay switching device 3 is connected to the input end of the command signal distributor 4 through a normally open contact. The DCS valve position main control system comprises an accepted feedback signal of the electric control valve, and a command signal which is output through comparison in the DCS is output to the signal distributor through a normally closed point of the relay switching device and then is output to a control loop of the electric control valve to control the action of the valve through the signal distributor; the DCS valve position compensation correction control system comprises a received laser range finder feedback signal; the received master control instruction feedback signal from the instruction signal distributor; and the two feedback signals are compared in the DCS to obtain a deviation, then a valve position correction signal is output to the signal distributor through the normally-open point of the relay switching device, and then the correction signal is output to a control loop for controlling the accurate adjustment of the valve by the electric control valve through the signal distributor. The over-torque protection control system comprises a torque control device 9, a torque detector 8, a differential pressure balance electric control valve 12, a valve back pressure measuring point 11, a valve front pressure measuring point 13 and a driving power supply 1, wherein a valve actual scale indicating rod 6 is additionally arranged at a valve core action connecting rod of an on-site electric control valve 7, a laser range finder 10 is fixedly arranged below the valve actual scale indicating rod, the torque detector 8 is additionally arranged at an action stroke mechanism at the other end of the electric control valve 7, the output end of the torque detector 8 is connected with the input end of the torque control device 9 through a cable, the first output end of the torque control device 9 is connected with a coil of the differential pressure balance electric control valve 12 through a cable, the second output end of the torque control device is connected with the driving power supply 1 of the electric control valve 7 through a cable, and the driving power supply 1 is connected with an actuator motor 5 through a cable in a switching mode. A valve body front pipeline of the electric control valve 7 is additionally provided with a valve front pressure measuring point 13, a valve rear pressure measuring point 11 is additionally arranged on a rear pipeline, a differential pressure balance pipeline is additionally arranged between the valve front pipeline and the valve rear pipeline, and a differential pressure balance electric control valve 12 is additionally arranged in the middle of the differential pressure balance pipeline. Before the valve is normally opened on line, due to the determination of the medium flowing direction, theoretically, the pressure before the valve is larger than the pressure after the valve, namely P1> P2, and the moment for opening the valve mainly overcomes the differential pressure delta P = P1-P2 before and after the valve. The torque detector detects the driving torque value of the motor of the electric regulating valve on line, the torque control device receives the measured value of the torque sensor and compares the measured value with a first-order set value SP1, when the measured value is larger than the SP1 set value, a control signal is output to drive the pressure difference balance electric control valve to be opened, so that the pressure P1 before the valve and the pressure P2 after the valve tend to be balanced, the pressure difference before the valve and the pressure difference after the valve are equal to each other to the maximum extent, and the valve can be normally opened.
The working process is as follows: as shown in fig. 1 above: after receiving the feedback signal input of the on-site electric control valve 7, the DCS valve position main control system 2 sends a control command through comparison output, enters the command signal distributor 4 through the normally closed contact of the command signal relay switching device 3, and then the command signal distributor 4 outputs a corresponding control signal to drive the electric control valve 7 to act so as to realize the closed-loop control of the valve. The normally closed contact of the command signal relay switching device 3 controls the on-off of the master command signal, and the normally open contact controls the on-off of the compensation correction signal. Meanwhile, the laser range finder 10 is installed below the actual scale indicating rod 6 of the on-site electric regulating valve 7, the laser range finder 10 sends the actual position of the valve action to the DCS valve position compensation correction control system 14 through a distance measuring signal for feedback and calculation to be converted into a standard valve position current signal, at the moment, the compensation correction control system 14 receives a valve position main control instruction current signal sent by the main control system at the same time, the compensation correction control system 14 compares the main control instruction current signal with the on-site actual valve position current signal and outputs a correction current signal to the relay switching device, at the moment, the compensation correction control system immediately sends a switching signal to a coil of the relay switching device to obtain the electric action, a normally closed contact inside the relay switching device is normally opened, the normally open contact is closed, namely, the correction current signal enters a command signal distributor through the contact of the relay switching device and outputs a control signal to the electric regulating valve for accurate control of the valve position compensation correction. A pressure measuring point 13 is arranged in front of an electric regulating valve, a pressure measuring point 11 is arranged behind the electric regulating valve, a differential pressure balance electric control valve 12 is additionally arranged in front of and behind the electric regulating valve, a torque sensor 8 measures a driving torque value of a motor of the electric regulating valve on line, a torque control device 9 receives a measured value of the torque sensor 8 and compares the measured value with a set value to output and control the differential pressure balance electric control valve 12 to open, so that the front and back differential pressures P1 and P2 of the electric regulating valve tend to be balanced, and the valve can be conveniently and normally opened; if the valve can not be started by keeping excessive moment, the moment control device 9 directly outputs a contact signal to cut off the driving power supply 1 of the actuator motor 5. The accident that the motor coil is burnt and damaged due to the continuous over-moment action of the electric actuating mechanism is prevented.
As shown in the schematic block diagram of the valve position automatic compensation correction control and the torque protection control in fig. 2: the normal control of the electric control valve is realized by that a DCS valve position main control system receives a valve position feedback signal, sends a control instruction to a signal switching device and outputs the control instruction to the electric control valve through a signal distributor so as to realize the closed-loop control of the valve opening. The DCS valve position compensation correction control system receives a valve position actual scale indication feedback signal from the field laser range finder, compares the valve position actual scale indication feedback signal with one path of main control instruction signal from the signal distributor in real time, and immediately sends a switch instruction to control the signal switching device to act once deviation exists, namely, the main control instruction signal circuit is cut off, and the compensation correction instruction signal circuit is switched on to control. And then calculating and converting the correction current signal into a correction current signal, outputting the correction current signal to a signal switching device, and outputting the correction current signal to the electric regulating valve through a signal distributor to perform valve position compensation correction control until the actual valve position indication on site is close to and matched with the control instruction signal to the maximum extent, thereby meeting the requirements of the production process. Before the electric control valve is started, because the pressure before the valve is always greater than the pressure after the valve, namely P1> P2, pressure difference is generated before and after the valve, and the valve cannot be normally started. At the moment, the torque control device receives a torque value measured on site by the torque sensor as a feedback signal, and simultaneously compares the feedback signal with a set value SP1, and if the torque measured value is greater than a first-stage set value SP1, the pressure difference balance electric control valve is driven to act and open, so that the front and back pressure differences of the electric control valve tend to be balanced, and the starting pressure is reduced; and if the torque measured value is continuously greater than the second-order set value SP2, immediately controlling to cut off the actuator driving power supply so as to protect the servo motor coil of the electric regulating valve from being burnt by excessive torque action.
If abnormal faults such as valve jamming occur, the normal torque of the motor cannot overcome other resistance to open the valve, namely the torque measured value is larger than the second-order SP2 set value, the torque control device immediately controls and cuts off the actuator driving power supply so as to protect the servo motor coil of the electric regulating valve from being burnt by excessive torque action.
After receiving the feedback signal input of the on-site electric control valve, the DCS valve position main control system sends a control command through comparison output, the control command enters the command signal distributor through the normally closed contact of the command signal relay switching device, and then the command signal distributor outputs a corresponding control signal to drive the electric control valve to act so as to realize the closed-loop control of the valve.
The DCS valve position compensation correction control system receives ranging signals fed back by the laser range finder and calculates and converts the ranging signals into standard valve position current signals, at the same time, the DCS compensation correction control system receives valve position main control instruction current signals sent by the main control system, the DCS compensation correction control system compares the main control instruction current signals with field actual valve position current signals and outputs correction current signals to the relay switching device, at the moment, the DCS compensation correction control system immediately sends switch signals to a coil of the relay switching device to be powered on, normally closed contacts inside the relay switching device are opened normally, normally open contacts are closed, namely, the compensation correction current signals enter the instruction signal distributor through the contacts of the relay switching device and output control signals to the electric regulating valve to perform accurate control of valve position compensation correction. Before the electric regulating valve is started, because the pressure before the valve is always greater than the pressure after the valve, namely P1 is greater than P2, pressure difference is generated before and after the valve, so that the valve cannot be normally started, at the moment, the torque control device receives a torque value measured on site by a torque sensor as a feedback signal, and simultaneously, the torque value is compared with a set value SP1, and the torque value is greater than the first-order set value SP1, so that the pressure difference balance electric control valve is driven to act and open, the pressure difference before and after the electric regulating valve tends to be balanced, and the starting pressure is reduced; and if the torque measured value is continuously greater than the second-order set value SP2, immediately controlling to cut off the actuator driving power supply so as to protect the servo motor coil of the electric regulating valve from being burnt by excessive torque action.
Therefore, the technical scheme designs a control method for automatically correcting, compensating and correcting the valve position control deviation, so that the controlled valve is accurately controlled, the valve position control precision is further improved, and the stable and smooth production is fully ensured. Meanwhile, the torque control device of the electric control valve is designed, the torque is measured on line, the front and back pressure difference balance of the valve is controlled, the valve is convenient to normally open, a driving power supply is further linked, and the motor safety of an electric valve actuating mechanism is fully protected.
It should be noted that the above-mentioned embodiments are not intended to limit the scope of the present invention, and all equivalent modifications and substitutions based on the above-mentioned technical solutions are within the scope of the present invention as defined in the claims.
Claims (4)
1. The device is characterized by comprising a DCS (distributed control system) valve position main control system, a DCS valve position compensation correction control system and an over-torque protection control system, wherein the DCS valve position main control system is connected with an electric control valve through a cable in a feedback signal mode, the DCS valve position main control system is connected with a command signal relay switching device through a cable in a command signal mode, a normally closed contact is used for continuously outputting a command signal in the relay switching device and is connected with the input end of a command signal distributor through the cable, and the first output end of the command signal distributor is in command connection with the electric control valve through the cable; the input end of the DCS valve position compensation correction control system is connected with the second output end of the command signal distributor through a cable, the feedback input end of the DCS valve position compensation correction control system is directly connected with the output end of the laser range finder through the cable, the output end of the DCS valve position compensation correction control system is connected with the command signal relay switching device through the cable, and the relay switching device is internally connected with the input end of the command signal distributor through a normally open contact.
2. The automatic valve position compensation and correction and over-torque protection control device of the electric control valve as claimed in claim 1, wherein the over-torque protection control system comprises a torque control device, a torque detector, a differential pressure balance electric control valve, a valve back pressure measuring point, a valve front pressure measuring point and a driving power supply, a valve actual scale indicating rod is additionally arranged at an action connecting rod of a valve core of the electric control valve, a laser range finder is fixedly arranged below the valve actual scale indicating rod, the torque detector is additionally arranged at an action stroke mechanism at the other end of the electric control valve, an output end of the torque detector is connected with an input end of the torque control device through a cable, a first output end of the torque control device is connected with a differential pressure balance electric control valve coil through a cable, a second output end of the torque control device is connected with the driving power supply of the electric control valve through a cable, and the driving power supply is connected with an actuator motor through a cable.
3. The automatic valve position compensation and correction and over-torque protection control device of the electric control valve as claimed in claim 1, wherein a front pipeline of the valve body of the electric control valve is provided with a front valve pressure measuring point, a rear pipeline is provided with a rear valve pressure measuring point, a differential pressure balancing pipeline is provided between the front valve pipeline and the rear valve pipeline, and a differential pressure balancing electric control valve is provided in the middle of the differential pressure balancing pipeline.
4. The automatic compensation correction and over-torque protection control device for the valve position of the electric control valve according to any one of claims 1 to 3, characterized in that the control method comprises the following steps:
1) After receiving the feedback signal input of the on-site electric control valve, the DCS valve position main control system sends a control command through comparison output, enters the command signal distributor through the normally closed contact of the command signal relay switching device, outputs a corresponding control signal through the command signal distributor to drive the electric control valve to act so as to complete the closed-loop control of the valve,
2) The DCS compensation correction control system carries out secondary comparison on the main control instruction current signal and an actual valve position current signal acquired by the field laser range finder, outputs a correction current signal to the relay switching device, at the moment, the DCS compensation correction control system immediately sends a switching signal to a coil of the relay switching device to be electrified, a normally closed contact inside the relay switching device is normally opened, a normally open contact is closed, namely, the compensation correction current signal enters the instruction signal distributor through the contact of the relay switching device and outputs a control signal to the electric regulating valve to carry out accurate control of valve position compensation correction,
3) Before the electric regulating valve is started, because the pressure before the valve is always greater than the pressure after the valve, namely P1 is greater than P2, pressure difference is generated before and after the valve, so that the valve cannot be normally started, at the moment, the torque control device receives a torque value measured on site by a torque sensor as a feedback signal, and simultaneously, the torque value is compared with a set value SP1, and the torque value is greater than the first-order set value SP1, so that the pressure difference balance electric control valve is driven to act and open, the pressure difference before and after the electric regulating valve tends to be balanced, the starting pressure is reduced, and the valve is convenient to normally open; and if the torque measured value is continuously greater than the second-order set value SP2, immediately controlling to cut off the actuator driving power supply so as to protect the servo motor coil of the electric regulating valve from being burnt by excessive torque action.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111166794.5A CN115899352A (en) | 2021-09-30 | 2021-09-30 | Automatic compensation correction and over-torque protection control device for valve position of electric regulating valve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111166794.5A CN115899352A (en) | 2021-09-30 | 2021-09-30 | Automatic compensation correction and over-torque protection control device for valve position of electric regulating valve |
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| CN202111166794.5A Pending CN115899352A (en) | 2021-09-30 | 2021-09-30 | Automatic compensation correction and over-torque protection control device for valve position of electric regulating valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117006310A (en) * | 2023-10-07 | 2023-11-07 | 深圳市恒永达科技股份有限公司 | Switching valve switching compensation method and device for analysis equipment and analysis equipment |
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2021
- 2021-09-30 CN CN202111166794.5A patent/CN115899352A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117006310A (en) * | 2023-10-07 | 2023-11-07 | 深圳市恒永达科技股份有限公司 | Switching valve switching compensation method and device for analysis equipment and analysis equipment |
| CN117006310B (en) * | 2023-10-07 | 2024-01-19 | 深圳市恒永达科技股份有限公司 | Switching valve switching compensation method and device for analysis equipment and analysis equipment |
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