CN113866625A - Method for detecting opening and closing amount state of electric switch valve - Google Patents
Method for detecting opening and closing amount state of electric switch valve Download PDFInfo
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- CN113866625A CN113866625A CN202111221596.4A CN202111221596A CN113866625A CN 113866625 A CN113866625 A CN 113866625A CN 202111221596 A CN202111221596 A CN 202111221596A CN 113866625 A CN113866625 A CN 113866625A
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000002955 isolation Methods 0.000 claims abstract description 12
- 238000005259 measurement Methods 0.000 claims abstract description 8
- 230000000007 visual effect Effects 0.000 claims abstract description 5
- 238000012545 processing Methods 0.000 claims abstract description 3
- 230000010354 integration Effects 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 238000013500 data storage Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 17
- 230000009471 action Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000009776 industrial production Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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Abstract
A method for detecting the opening and closing state of an electric switch valve belongs to the technical field of industrial automation control. It comprises the following steps: 1. checking an electric valve operation loop, and switching to a switch valve mode; 2. judging whether the detected switch is a dry contact or a wet contact in the loop; 3. when the detected switch is a wet contact in a loop, a voltage acquisition module is adopted to acquire a voltage value; 4. when the detected switch is a wet contact in a loop, a switching value isolation module is adopted to collect a voltage value; 5. and integrating the measurement of the dry contact and the wet contact, and detecting the state of the switch for visual processing. The invention can accurately calibrate the valve action time node by detecting the valve control switch state, analyzes the stress conditions at the moment and completes the valve performance detection.
Description
Technical Field
The invention belongs to the technical field of industrial automation control, and particularly relates to a method for detecting states of a travel switch, a torque switch and a bypass switch of an electric valve when the electric switch valve is subjected to performance test.
Background
The electric switch valve is to control the valve by an electric actuator, thereby realizing the opening and closing of the valve. The electric actuator can be divided into an upper part and a lower part, wherein the upper part is the electric actuator, and the lower part is the valve. Because it has only two states of on and off, it is very important for some process control systems, and thus it is very widely used in industrial production processes.
The detection of the control switch state of the electric switch valve is of great significance, firstly, each control switch in the electric switch valve, such as a limit switch, a torque switch, a bypass switch and the like, controls the valve to start and stop moving, if problems are not found in time, the service life of the valve and the performance and safety of a control system can be seriously influenced, and hidden dangers are brought to industrial production. Secondly, the load performance in industrial process control is the description of the control valve actuating mechanism part, and the relation between the actuating capacity of the actuating mechanism, the stress condition of the valve rod in the movement process and the force transmission, input signals and valve rod displacement of the control valve under the action of the gradual change signals is researched. These characteristics play a critical role in controlling whether they will work properly under certain operating conditions. The environment of the valve in the industrial production process is often severe, the actual valve position stroke cannot be measured, and the problems are overcome.
Disclosure of Invention
In view of the above problems in the prior art, an object of the present invention is to provide a detection method capable of accurately calibrating a valve action time node by detecting a valve control switch state, analyzing stress conditions at these times, and completing valve performance detection.
The invention provides the following technical scheme: a method for detecting the on-off state of an electric switch valve is characterized in that the on-off state of a detected switch is graphically programmed through an on-off isolation module, a voltage acquisition module, a data storage module and a LABVIEW (left-hand voltage converter), so that the on-off state is quantized and visually displayed, and the specific process is as follows:
step 1, checking an electric valve operation loop, and switching to a switch valve mode;
wherein S represents the state of the switch to be tested, V (t) represents the voltage value at each moment,
；
and 5, integrating the measurement of the dry contact and the measurement of the wet contact, and detecting the state of the switch for visual processing.
Preferably, the specific process of integrating the dry junction and the wet junction measurement in step 5 is as follows:
and a live power supply loop is added in the dry contact loop, when the measuring contact is a wet contact, the added power supply loop is manually shielded, and when the measuring contact is a dry contact, the live power supply loop is manually switched.
By adopting the technology, compared with the prior art, the invention has the following beneficial effects:
1) the invention can accurately calibrate the valve action time node by detecting the valve control switch state, and analyze the stress conditions at the moment to complete the valve performance detection;
2) the invention designs a dry and wet contact point integration circuit, a power supply loop is added in a dry contact point loop, when a measuring contact point is a wet contact point, the added power supply loop is shielded, and when the measuring contact point is a dry contact point, the dry and wet contact point integration circuit is switched to the power supply loop;
3) the switching value state detection system of the switching valve is developed based on LABVIEW graphical programming, so that the switching value state is quantized, a UI (user interface) is designed for visual display, and the switching state can be effectively and visually known; the system displays the state of the control switch and other access signals on a UI interface, and has very important significance for controlling the running time node of the control valve and analyzing each index.
Drawings
FIG. 1 is a schematic view of a software interface visualization of the present invention;
FIG. 2 is a schematic diagram of the connection of a bench test apparatus according to the method of the present invention;
FIG. 3 is a schematic view of the integration of dry and wet joint measurements according to the present invention;
FIG. 4 is a diagram illustrating the open-limit result of the open-limit switch according to the embodiment of the present invention;
FIG. 5 is a diagram showing the open limit closing moment results of the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
On the contrary, the invention is intended to cover alternatives, modifications, equivalents and alternatives which may be included within the spirit and scope of the invention as defined by the appended claims. Furthermore, in the following detailed description of the present invention, certain specific details are set forth in order to provide a better understanding of the present invention. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details.
Example (b):
referring to fig. 1-5, a method for detecting the switching value state of an electric switch valve, as shown in fig. 2, is a diagram of a bench test apparatus of the method of the present invention, and mainly includes three parts, an upper computer PC, a VDS, and an electric valve, wherein ZT represents a fiber feedback/transmitter, JCO/C represents an on/off control signal, ZC represents an adjustment control signal, O123 represents an on contact, and C123 represents an off contact. The upper computer mainly operates the electric valve switching value detection system designed by the invention, the interface of the electric valve switching value detection system is shown in fig. 1, the left side of the electric valve switching value detection system is a function key area, the upper half part of the right side of the electric valve switching value detection system is a graphic display area, and the lower half part of the electric valve switching value detection system is a performance index calculation value display area. The detection of the opening and closing amount of the electric valve is only one of the functions of the system. The VDS is an integrated device which comprises a voltage acquisition module, a signal output module and a data acquisition and storage module. The electric valve is a dual-purpose electric valve, and can be used as an electric regulating valve and an electric switch valve. The valve is used as an electric switch valve in the embodiment, and the opening and closing movement of the valve is controlled by JCO/JCC.
This example detects two cases: limit by opening and closing, and limit by opening and closing moment.
The method comprises the following specific steps:
1) and checking that the electric valve operation loop is normal, and switching to an opening and closing valve mode. The detection of the switching value state of the electric switch valve is to detect the connection and disconnection of the switch substantially and is commonly used for detecting a limit switch, a torque switch and a bypass switch;
2) connecting the switch to be tested to the measuring equipment as shown in FIG. 3;
3) judging whether the detected switch is a dry contact or a wet contact in the loop;
4) if the detected switch is a wet joint in the loop, a voltage acquisition module is adopted to acquire a voltage value, the measured voltage is an actual voltage value when the switch is in an off state, and the measured voltage is zero when the switch is in an on state, wherein the expression is as follows:
in the above formula, S represents the state of the switch to be tested, and V (t) represents the voltage value at each moment;
5) if the detected switch is a dry contact, a switching value isolation module is adopted, when the switch is in an off state, the switching value isolation module outputs voltage (24V), when the switch is in an on state, the switching isolation module outputs voltage of 0V, and then the step (3) is carried out;
6) the detection switch state is visualized through Labview interface display, the switch state is known at any time, and the results are shown in FIGS. 4 and 5. In fig. 4, the broken line indicates the open limit, the thin solid line indicates the closed limit, and the thick solid line indicates the valve position. In fig. 5, the broken line indicates the open limit, the thin solid line indicates the closing torque, and the thick solid line indicates the valve position.
The invention develops the switching value state detection system of the switching valve based on LABVIEW graphical programming, so that the switching value state is quantized, and a UI interface is designed for visual display, so that the switching state can be effectively and visually known. In the system, other signal access interfaces such as valve position signals, current signals, voltage signals and the like are also arranged. In the actual life production, the detection of the control valve is not limited to the detection of the state of the control switch, the aim is to know the displacement condition of the control valve and the stress condition of the valve rod while the control switch acts, the system well solves the problems, displays the state of the control switch and other access signals on a UI interface, and has very important significance for the control of the running time node of the control valve and the analysis of each index.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (2)
1. A method for detecting a state of an opening/closing amount of an electric switch valve, characterized by: the on-off condition of the detected switch is graphically programmed through the switching value isolation module, the voltage acquisition module, the data storage module and the LABVIEW, so that the state of the switching value is quantized and visually displayed, and the specific process is as follows:
step 1, checking an electric valve operation loop, and switching to a switch valve mode;
step 2, judging whether the detected switch is a dry contact or a wet contact in the loop;
step 3, when the detected switch is a wet joint in the loop, a voltage acquisition module is adopted to acquire a voltage value, the measured voltage is an actual voltage value when the switch is in an off state, and the measured voltage is zero when the switch is in an on state, wherein the expression is as follows:
wherein S represents measuredIn an off state, V (t) represents a voltage value at each time,
；
step 4, when the detected switch is a wet joint in the loop, a switching value isolation module is adopted, when the switch is in an off state, the switching value isolation module outputs voltage, when the switch is in an on state, the switching value isolation module outputs voltage of 0V, and then step 3 is carried out;
and 5, integrating the measurement of the dry contact and the measurement of the wet contact, and detecting the state of the switch for visual processing.
2. The method for detecting the opening and closing state of the electric switch valve according to claim 1, wherein the integration of the measurement of the dry contact and the wet contact in the step 5 is performed as follows:
and a live power supply loop is added in the dry contact loop, when the measuring contact is a wet contact, the added power supply loop is manually shielded, and when the measuring contact is a dry contact, the live power supply loop is manually switched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111221596.4A CN113866625B (en) | 2021-10-20 | 2021-10-20 | Method for detecting state of switching value of electric switch valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111221596.4A CN113866625B (en) | 2021-10-20 | 2021-10-20 | Method for detecting state of switching value of electric switch valve |
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| CN113866625A true CN113866625A (en) | 2021-12-31 |
| CN113866625B CN113866625B (en) | 2024-04-02 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180066687A (en) * | 2016-12-09 | 2018-06-19 | 주식회사 대명스카다 | Mornitoring system for motor operation valve |
| WO2018107455A1 (en) * | 2016-12-16 | 2018-06-21 | 陈锡瑜 | Apparatus and method for detecting switch contact state |
| CN109974770A (en) * | 2017-12-27 | 2019-07-05 | 核动力运行研究所 | A kind of motor-driven valve condition detecting system and method |
| US20190278244A1 (en) * | 2018-03-12 | 2019-09-12 | Rosemount Inc. | Field device switch monitor |
| CN111350859A (en) * | 2018-12-21 | 2020-06-30 | 核动力运行研究所 | Device and method for detecting state of electric regulating valve |
| CN111897254A (en) * | 2020-07-14 | 2020-11-06 | 深圳瑞莱保核能技术发展有限公司 | Intelligent valve performance analysis system and method based on Internet of things |
-
2021
- 2021-10-20 CN CN202111221596.4A patent/CN113866625B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180066687A (en) * | 2016-12-09 | 2018-06-19 | 주식회사 대명스카다 | Mornitoring system for motor operation valve |
| WO2018107455A1 (en) * | 2016-12-16 | 2018-06-21 | 陈锡瑜 | Apparatus and method for detecting switch contact state |
| CN109974770A (en) * | 2017-12-27 | 2019-07-05 | 核动力运行研究所 | A kind of motor-driven valve condition detecting system and method |
| US20190278244A1 (en) * | 2018-03-12 | 2019-09-12 | Rosemount Inc. | Field device switch monitor |
| CN111350859A (en) * | 2018-12-21 | 2020-06-30 | 核动力运行研究所 | Device and method for detecting state of electric regulating valve |
| CN111897254A (en) * | 2020-07-14 | 2020-11-06 | 深圳瑞莱保核能技术发展有限公司 | Intelligent valve performance analysis system and method based on Internet of things |
Non-Patent Citations (1)
| Title |
|---|
| LEI YANG 等: "Cause Analysis and Probability Determination Method of Circuit Breaker Opening Failure", 《CICED 2020》, pages 6 - 9 * |
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