CN102879185A

CN102879185A - Valve signal testing method

Info

Publication number: CN102879185A
Application number: CN2011101989188A
Authority: CN
Inventors: 施杰; 刘椿峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-07-16
Filing date: 2011-07-16
Publication date: 2013-01-16

Abstract

The invention discloses a valve signal testing method. According to the method, a direct-current control electric signal is provided for a current-to-pneumatic (I/P) converter by a controllable constant current source in a TST2811 valve signal control analyzer; a current is converted into a pressure for a pump valve by the I/P converter; a valve changes after being pressurized; the change is input to the TST2811 valve signal control analyzer by a strain sensor arranged on the upper surface of the valve; the strain sensor is connected with a computer through a universal serial bus (USB) data line; the TST2811 valve signal control analysis software acquires a change curve measured by the sensor and a real-time curve of the output pressure and the time of the I/P converter at the same time; and the acquired real-time data of the output pressure and the time of the IP converter are compared with each real-time change curve acquired by the software, so that whether each part of the valve works normally can be tested. By the valve signal testing method, whether the valve works normally can be known without dismantling each part of the valve for testing, so that time and resources are saved.

Description

The valve signal testing method

Technical field: the present invention relates to the valve signal testing method.

Background technology: along with the sustained and rapid development of Chinese national economy, China's energy industry has been proposed very urgent requirement.At present, the many-sides such as the energy security of collateral security China, Optimization of Energy Structure, support national economy sustainable development are in the urgent need to setting out, and China has worked out is based on thermoelectricity, greatly develops water power, the policy of the appropriateness development of new energy is such as nuclear power and wind-power electricity generation etc.The construction of China's nuclear power just is adjusted into to strategic and aggressive development from tentative, compensatory.This Nuclear Electricity for China is a fabulous development opportunity, and the great demand of nuclear power station valve has brought wide market outlook then for domestic and international valve production firm.Along with the development of maintenance of electric generation equipments technology, the predictability maintenance is widely used.In recent years, all over the world nuclear power station has been accelerated the research of predictability maintenance technique and the exploitation of equipment performance diagnostic tool.Performance diagnogtics instrument and pneumatic control valve performance diagnogtics instrument such as electrically operated valve are promoted the use of in the nuclear power station of France.By the usability diagnostic tool, whether the various performance index that the valve that can not need to disintegrate just can be grasped valve meet design requirement.Thereby avoid some unnecessary overhaul of the equipments work, reduce standby redundancy and use and saving resource, the while is the defective of discovering device early, avoids the damage of equipment.But domestic also do not have a this effectively efficiently way that detects for valve.

Early stage maintenance of valve idea is to allow valve work as far as possible for a long time, in case find fault, factory is stopped, and immediately equipment is keeped in repair to recover its original state.This need to dismantle and take apart valve, maintenance or replacing wearing and tearing or bad part.The maintenance mode of this passivity is because the shortage diagnostic techniques causes, so that loses time very much, increases cost.

Summary of the invention: purpose of the present invention will provide a kind of valve signal testing method exactly, and it does not need

Dismantle valve and just can detect diagnosis to valve.The object of the present invention is achieved like this, the valve signal testing method, it is characterized in that: the DC control electric signal of supplying with first a 4 ~ 20mA who slowly changes of I/P converter by controlled constant current source built-in in the TST2811 valve signal controlling analyser, the time size can be controlled, the I/P converter is converted into pressure with electric current afterwards, give pump valve a pressure that slowly changes, be equivalent to apply certain excitation to valve, deformation occurs after being applied in pressure in valve, displacement, the variation of the physical quantitys such as angle, then the variation that the change transitions of physical quantity is become voltage signal by being installed in strain gauge transducer above the valve or IEPE sensor, be input to TST2811 valve signal controlling analyser, TST2811 valve signal controlling analyser is connected with computing machine by the usb data line, computing machine is equipped with TST2811 valve signal controlling analysis software, and TST2811 valve signal controlling analysis software collects physical quantity change curve that sensor records and I/P converter output pressure and actual real-time curve simultaneously.According to the output pressure of the I/P converter that collects and the real time data of time, whether the real-time change curve of each physical quantity that collects with software again compares, and is analyzed, can record this valve all parts and work.The all parts that the present invention need not to take apart valve detects, and whether working properlyly conveniently detects valve.Thereby avoided some unnecessary overhaul of the equipments work, reduced the quantity of standby redundancy, saved time and resource, the while is the defective of discovering device early, avoids the damage of equipment.

Description of drawings:

Fig. 1 is valve diagnosis schematic diagram of the present invention;

1.IEPE sensor comprises straight-line displacement, angle displacement, pressure, 2. strain gauge transducer, 3. valve, 4.I/P converter, 5.TST2811 valve signal controlling analyser, 6. TST2811 valve signal controlling analysis software.

Embodiment:

The valve signal testing method is characterized in that: supply with first the DC control electric signal of a 4 ~ 20mA who slowly changes of I/P converter by controlled constant current source built-in in the TST2811 valve signal controlling analyser, the time size can be controlled; The I/P converter is converted into pressure with electric current afterwards, give pump valve a pressure that slowly changes, be equivalent to apply certain excitation to valve, deformation occurs after being applied in pressure in valve, displacement, the variation of angle physical quantity, then the variation that the change transitions of physical quantity is become voltage signal by being installed in strain gauge transducer above the valve or IEPE sensor, be input to TST2811 valve signal controlling analyser, TST2811 valve signal controlling analyser is connected with computing machine by the usb data line, computing machine is equipped with TST2811 valve signal controlling analysis software, and TST2811 valve signal controlling analysis software collects physical quantity change curve that sensor records and I/P converter output pressure and actual real-time curve simultaneously; According to the output pressure of the I/P converter that collects and the real time data of time, whether the real-time change curve of each physical quantity that collects with software again compares, and is analyzed, can record this valve all parts and work.During implementation, at first each test point at pump valve installs various IEPE sensors, they comprise straight-line displacement, angle displacement, pressure and strain gauge transducer, and the IEPE sensor is connected respectively to IEPE sensor side and strain gauge transducer end on the TST2811 valve signal controlling analyser by signal wire; The I/P converter is connected to TST2811 valve signal controlling analyser by wire can controls the dc current signal output terminal, the controlled constant current source of TST2811 valve signal controlling analyser inside feeds to the I/P converter, input signal 4 ~ 20mA, output 20 ~ 700KPa can set, the DC control electric signal of a 4-20mA of input, the time size can be controlled, and pressure that slowly changes of I/P converter control output is to pump valve.TST2811 valve signal controlling analyser gathers the signal of each road sensor, and is converted into direct physical quantity signal by software and shows on computers, and can draw the time dependent real-time curve of each physical quantity.Simultaneously according to the output pressure of the I/P converter that collects together and the real time data of time, the real-time change curve of each physical quantity that collects with software again compares, and is analyzed.

Claims

1. valve signal testing method is characterized in that: supply with first the DC control electric signal of a 4 ~ 20mA who slowly changes of I/P converter by controlled constant current source built-in in the TST2811 valve signal controlling analyser, the time size can be controlled; The I/P converter is converted into pressure with electric current afterwards, give pump valve a pressure that slowly changes, be equivalent to apply certain excitation to valve, deformation occurs after being applied in pressure in valve, displacement, the variation of angle physical quantity, then the variation that the change transitions of physical quantity is become voltage signal by being installed in strain gauge transducer above the valve or IEPE sensor, be input to TST2811 valve signal controlling analyser, TST2811 valve signal controlling analyser is connected with computing machine by the usb data line, computing machine is equipped with TST2811 valve signal controlling analysis software, and TST2811 valve signal controlling analysis software collects physical quantity change curve that sensor records and I/P converter output pressure and actual real-time curve simultaneously; According to the output pressure of the I/P converter that collects and the real time data of time, whether the real-time change curve of each physical quantity that collects with software again compares, and is analyzed, can record this valve all parts and work.