CN108019555A - A kind of solenoid valve fault diagnostic method based on force sensor signals - Google Patents
A kind of solenoid valve fault diagnostic method based on force sensor signals Download PDFInfo
- Publication number
- CN108019555A CN108019555A CN201610932511.6A CN201610932511A CN108019555A CN 108019555 A CN108019555 A CN 108019555A CN 201610932511 A CN201610932511 A CN 201610932511A CN 108019555 A CN108019555 A CN 108019555A
- Authority
- CN
- China
- Prior art keywords
- solenoid valve
- plunger
- force
- force sensor
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The present invention relates to a kind of solenoid valve fault diagnostic method based on force sensor signals, to setting the solenoid valve of force sensor to apply specified electrical excitation signal, makes plunger motion；During plunger motion, the impact between the plunger and valve body/coil case of measuring force sensor feedback, obtains force signal；By force signal compared with abnormality threshold value, fault condition threshold, current electromagnetic valve state is judged.The present invention can not only detect that can solenoid valve work normally, and be capable of the actual degenerate state of accurate measurements solenoid valve, and then to realize that the maintenance based on state lays the foundation.
Description
Technical field
The present invention relates to solenoid valve failure detection field, specifically a kind of solenoid valve event based on force sensor signals
Hinder diagnostic method.
Background technology
Solenoid valve be for controlling or the automatic foundamental element of the parameter such as the direction of adjusting process fluid, flow, speed,
It has been widely used in all trades and professions such as process industry, automobile, engineering machinery.
● electromagnetism REASON ANALYSIS ON INLET
In the operational process of solenoid valve, equipment can be subject to come from process fluid, surrounding environment and electromagnetic coil fuel factor
And the influence of the multiple stress produced.The dominant failure mode and mechanism of solenoid valve is briefly described below.
Magnet plunger primarily serves the effect of break-make process fluid, under normal conditions piston of electromagnetic valve directly with technique stream
Body contacts.In order to realize expected on-off function, plunger must be made of soft iron magnetic material, and current most common material is
430F stainless steels (i.e. low-carbon, high chromium-stainless steel), it applies and designs exclusively for solenoid valve, is adapted to work in a corrosive environment
Make.Since plunger is directly contacted with process fluid, with the increase of usage time, plunger can be corroded.Further, since plunger
Directly contacted with plunger tube, therefore can cause to rub during plunger motion, wear and generation phenomena such as spillage of material.
With friction, abrasion and the aggravation of material deterioration inside, it will become apparent from out stick-slip behavior or cause valve is poorly sealed etc. when closing to ask
Topic.At the same time, for plunger for a long time among the magnetic field that electromagnetic coil produces, this may result in the permanent magnetic of plunger
Change, and then cause the problems such as improper metering of incorrect plunger action and process fluid.Above-mentioned plunger Behavioral change will cause
The change that plunger is responded for magnetic field excitation, and then change caused impact size when plunger arrives at operating position, therefore,
Using force sensor measuring impact new way is provided for solenoid valve equipment fault diagnosis.
Plunger tube be plunger between electromagnetic coil together with barrier.The function of plunger tube is to prevent electromagnetic coil to be subject to work
The erosion of skill fluid, while magnetic flux is also introduced plunger (rather than being looped around around piston) by it.Plunger tube is mainly aluminium or paramagnetic
Property stainless steel (ferromagnetism plunger tube provide magnetic field line shunt paths, so as to reduce the efficiency of solenoid valve) is provided.Rodent work
Caused frictional force will cause plunger tube to wear during skill fluid and plunger motion, this will be produced may suppressed column
Fill in the wear particle thing of movement.When plunger contact is to wear particle thing, plunger will become apparent from out abnormal response in magnetic field.Cause
This, anomalous variation of the above-mentioned plunger to magnetic responsiveness equally can be effectively detected by analyzing force sensor signals.
Electromagnetic coil produces magnetic field, and then drives plunger motion.Wire used in electromagnetic coil is commonly referred to as magnetic filament, leads to
Often it is copper.In solenoid valve market, the turn-to-turn insulation material of usually used three types：The temperature grade of the rank that insulate E is 120
DEG C, the temperature grade of insulation rank F is 155 DEG C, and the temperature grade of insulation rank H is 180 DEG C.Coil construction is generally divided into two
Kind：Looping coil and potted coil.Looping coil is made of roll and spool, then with insulating tape protective winding；Encapsulation
Coil also has a coil winding around spool or coiling, the difference is that coil is packaged or by suitable resin pressure
Mould.When electric current passes through coil, fuel factor can raise conductor temperature.If temperature is excessive, the dielectric material between conducting wire can
Energy meeting degradation failure, two adjacent wires will be formed and are electrically connected, and then produce turn-to-turn short circuit or layer short circuit.Short circuit can cause line
Enclosing resistance reduces, and then increases electric current.In the position of short circuit, the hot localised points of high temperature will be gradually formed, so as to cause open circuit.
Corrosion can cause coil constriction and conductive material to be lost, and then cause coil failure.Due to the degeneration of electromagnetic coil, energization when institute
The magnetic field intensity of generation will change, and then cause hitting between plunger and valve body or coil case during electromagnetism valve events
Hit power to change, this change is able to detect that by force snesor.
● existing solenoid valve failure detection technique
Some valve health monitoring techniques have been suggested, and some of which technology can be applied to solenoid valve.It is presently the most wide
The valve health monitoring technique of general use is Partial stroke test.In the method, valve pillar is detected using position sensor
The change of position is filled in, realizes that failsafe valve detects whereby.However, the shortcomings that Partial stroke test, is due to many electromagnetic valve bodies
Product is smaller, therefore accommodates a position sensor without enough inner spaces.In addition, mathematically, acceleration is
The second differential of position signal, therefore, the fault detection method based on change in location can not detect that those only believe acceleration
Number sensitive failure.
U.S.'s Oak Ridge National Laboratory completes a series of experiments for solenoid valve health monitor method.Itd is proposed
Method includes：The equivalent circuit modeling of the inductance, electromagnetic coil of coil is monitored during solenoid valve is triggered and in increase electricity
Monitoring flows through the electric current of electromagnetic coil in the case of pressure.Although these methods are capable of providing the health and fitness information of electromagnetic coil,
Online health monitoring ability can not be provided.
Also other technologies can realize that solenoid valve failure diagnoses, such as understand plunger by measuring the electric current of solenoid valve
Movement and electromagnetic coil health status, but this method only gives indirect measurement to the failure mode of solenoid valve, it can not
The agenda and degenerate state of plunger state are provided；Magnet plunger state is verified by measuring sound field and electric field signal
The shortcomings that change, this method, is to be only capable of whether detection solenoid valve is successfully activated, and can not describe the degeneration shape of solenoid valve
State；Magnet plunger position is monitored by monitoring applied to the phase difference between the voltage and current of solenoid valve, this method is same
Sample can not directly reflect the actual degenerate state of solenoid valve.
For this reason, the present invention is directed to the various failure modes of electromagnetic valve component, it is proposed that a kind of directly solenoid valve health shape
State monitoring method.The technology proposed can not only detect that can solenoid valve work normally, and being capable of accurate measurements electromagnetism
The actual degenerate state of valve, and then to realize that base is established in the maintenance (condition based maintenance) based on state
Plinth.
The content of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of directly solenoid valve health status monitoring method.Can not only
Enough detect that can solenoid valve work normally, and be capable of the actual degenerate state of accurate measurements solenoid valve, and then to realize base
Lay the foundation in the maintenance of state.
The used to achieve the above object technical solution of the present invention is：
A kind of solenoid valve fault diagnostic method based on force sensor signals, comprises the following steps：
Step 1：To setting the solenoid valve of force sensor to apply specified electrical excitation signal, make plunger motion；
Step 2：During plunger motion, hitting between the plunger and valve body/coil case of measuring force sensor feedback
Power is hit, and carries out data analysis and feature extraction, obtains effective force signal；
Step 3：By force signal compared with abnormality threshold value, fault condition threshold, current electromagnetic valve state is judged.
The force snesor, which is arranged at, can effectively measure in solenoid valve impact between plunger and valve body/coil case
Position.
The force snesor is ring-type force snesor, is correspondingly arranged at valve port and does not influence flow of media.
The force snesor is column force snesor, and is arranged between plunger and seal, and shape is integral therewith.
The force snesor is column force snesor, is arranged at the top of resetting spring, is bonded with coil case, and it is whole to form one
Body, and plunger proper motion is not influenced.
It is described by force signal compared with abnormality threshold value, fault condition threshold, judge current electromagnetic valve state bag
Include procedure below：
If force signal is not less than abnormality threshold value, judge that solenoid valve is in normal condition；
If force signal is less than abnormality threshold value and is not less than fault condition threshold, judge that solenoid valve is in abnormal shape
State；
If force signal is less than fault condition threshold, judge that solenoid valve is in malfunction.
The invention has the advantages that and advantage：
1. the present invention can not only detect that can solenoid valve work normally, and be capable of the reality of accurate measurements solenoid valve
Degenerate state, and then to realize that the maintenance based on state lays the foundation.
2. the present invention inside solenoid valve by adding the shock between force sensor measuring plunger and valve body/coil case
Power, obtains amplitude information, is able to detect that the various failure modes of electromagnetic valve component.
3. the information in the present invention, obtained by force snesor is able to detect that the plunger or plunger tube of such as solenoid valve
The various failures such as pollution and the degeneration of burn into electromagnetic coil.
Brief description of the drawings
Fig. 1 is flow chart of the method for the present invention；
Fig. 2 is the electromagnetic valve structure figure of the present invention；Wherein, it is 1. electromagnetic coil；2. it is plunger；3. it is coil case；④
For resetting spring；5. it is plunger tube；6. it is valve body；7. it is seal；8. it is valve port；9. it is force snesor；
Fig. 3 is 1 schematic diagram of the embodiment of the present invention；
Fig. 4 is 2 schematic diagram of the embodiment of the present invention；
Fig. 5 is 3 schematic diagram of the embodiment of the present invention.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and embodiments.
It is as shown in Figure 1 flow chart of the method for the present invention.
First to setting the solenoid valve of force sensor to apply specified electrical excitation signal, make plunger motion；
Secondly during plunger motion, the shock between the plunger and valve body/coil case of measuring force sensor feedback
Power, obtains force signal；
Finally by force signal compared with abnormality threshold value, fault condition threshold, current electromagnetic valve state is judged.
The method of the present invention is to place force snesor in solenoid valve correspondence position, and applying specified Electron Excitation to solenoid valve believes
Number, by the impact between the plunger and valve body/coil case of measuring force sensor feedback, to detect solenoid valve failure.
Based on obtained force snesor output valve is repeatedly measured, solenoid valve health guidelines can be established, assess electromagnetism whereby
The health status of valve equipment.Above- mentioned information can be used for the maintenance measures for instructing solenoid valve equipment.
Abnormality includes：
Plunger contact makes movement of the plunger under magnetic fields abnormal shape occur to the solid matter for suppressing plunger motion
State；
Plunger is made plunger unconventional action and the improper metering of process fluid occur, plunger is existed by permanent-magnetic
There is abnormality in movement under magnetic fields；
The conducting wire of electromagnetic valve coil, which is formed, to be electrically connected, and produces short circuit, movement of the plunger under magnetic fields occurs abnormal
State.
Malfunction includes：
Plunger contact to suppress plunger motion solid matter, cause plunger not move, can not play should have closing or
Open function, shows as solenoid valve failure state；
There is open circuit in the conducting wire of electromagnetic valve coil, causes plunger not move, makes solenoid valve failure state.
Such as the electromagnetic valve structure figure that Fig. 2 is the present invention.
According to the physical law of electromagnetism, magnetic field force and magnetic field intensity it is square proportional.The operation principle of solenoid valve is：
Magnetic field is constructed using electromagnetic coil, plunger moves to its operating position by resting position under the influence of a magnetic field；Plunger loses
After electromagnetic action, initial position will be returned under the action of resetting spring.Therefore, under the influence of a magnetic field, when plunger arrives at work
When making position, it can directly reflect the health status of solenoid valve for the impact of valve body using force sensor measuring plunger.It is right
For a brand-new valve, the slave initial position for having no obstacle under the influence of a magnetic field is moved to operating position by plunger.
Corrosion due to process fluid and the valve body aging caused by the fuel factor of environment and electromagnetic coil, make in solenoid valve
During energy when plunger arrives at operating position, the impact between plunger and valve body will change, this change can be used
In the health status of monitoring solenoid valve.
Force snesor must require to place according to following：When plunger is moved to operating position, force snesor allows for
Capture the impact between plunger and valve body/coil case.
For valve open in usual, since operating position is in valve orifice, the shape of sensor must assure that aperture energy
It is enough to seal or open on request.
It is illustrated in figure 31 schematic diagram of embodiment.
For circular orifice, annular force snesor can be used, is correspondingly arranged at valve port and does not influence
Flow of media.
It is illustrated in figure 42 schematic diagram of embodiment.
Preferably, force snesor can also be installed on the top of seal, and between seal and plunger.
It is illustrated in figure 53 schematic diagram of embodiment.
For normally closed type valve, force snesor selects column force snesor, is arranged at back-moving spring top
Portion, the blind end in plunger casing, is bonded with coil case, and shape is integral, and does not influence plunger proper motion.Power senses
The size and shape of device must assure that it can be placed into inside pipe casing, and can capture return spring hitting for coil case
Hit power.
Claims (6)
1. a kind of solenoid valve fault diagnostic method based on force sensor signals, it is characterised in that comprise the following steps：
Step 1：To setting the solenoid valve of force sensor to apply specified electrical excitation signal, make plunger motion；
Step 2：During plunger motion, the impact between the plunger and valve body/coil case of measuring force sensor feedback,
And data analysis and feature extraction are carried out, obtain effective force signal；
Step 3：By force signal compared with abnormality threshold value, fault condition threshold, current electromagnetic valve state is judged.
2. the solenoid valve fault diagnostic method according to claim 1 based on force sensor signals, it is characterised in that：It is described
Force snesor is arranged at the position that can effectively measure impact between plunger and valve body/coil case in solenoid valve.
3. the solenoid valve fault diagnostic method according to claim 2 based on force sensor signals, it is characterised in that：It is described
Force snesor is ring-type force snesor, is correspondingly arranged at valve port and does not influence flow of media.
4. the solenoid valve fault diagnostic method according to claim 2 based on force sensor signals, it is characterised in that：It is described
Force snesor is column force snesor, and is arranged between plunger and seal, and shape is integral therewith.
5. the solenoid valve fault diagnostic method according to claim 2 based on force sensor signals, it is characterised in that：It is described
Force snesor is column force snesor, is arranged at the top of resetting spring, is bonded with coil case, shape is integral, and does not influence
Plunger proper motion.
6. the solenoid valve fault diagnostic method according to claim 1 based on force sensor signals, it is characterised in that：It is described
By force signal compared with abnormality threshold value, fault condition threshold, judge that current electromagnetic valve state includes procedure below：
If force signal is not less than abnormality threshold value, judge that solenoid valve is in normal condition；
If force signal is less than abnormality threshold value and is not less than fault condition threshold, judge that solenoid valve is in abnormality；
If force signal is less than fault condition threshold, judge that solenoid valve is in malfunction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610932511.6A CN108019555A (en) | 2016-10-31 | 2016-10-31 | A kind of solenoid valve fault diagnostic method based on force sensor signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610932511.6A CN108019555A (en) | 2016-10-31 | 2016-10-31 | A kind of solenoid valve fault diagnostic method based on force sensor signals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108019555A true CN108019555A (en) | 2018-05-11 |
Family
ID=62070461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610932511.6A Pending CN108019555A (en) | 2016-10-31 | 2016-10-31 | A kind of solenoid valve fault diagnostic method based on force sensor signals |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108019555A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113466585A (en) * | 2021-06-22 | 2021-10-01 | 北京化工大学 | Pulse excitation-based online detection method for external characteristics of in-service pneumatic stop valve |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030033848A1 (en) * | 2001-08-08 | 2003-02-20 | Industrial Scientific Corporation | Method and apparatus for diagnosing gas sensors |
| KR20110120852A (en) * | 2011-09-28 | 2011-11-04 | 주식회사 조흥밸브앤파이프 | Water valve measuring water pressure and transmitting wireless data |
| CN103032626A (en) * | 2012-12-12 | 2013-04-10 | 济南大学 | System and method for diagnosing fault of adjusting valve |
| CN103336189A (en) * | 2013-05-24 | 2013-10-02 | 中国人民解放军第二炮兵工程大学 | Solenoid valve fault diagnostic method based on current detection |
| CN204437319U (en) * | 2015-01-13 | 2015-07-01 | 永嘉县中川泵阀制造有限公司 | A kind of gate valve that automatically can detect the valve plate life-span |
| CN205506374U (en) * | 2016-03-01 | 2016-08-24 | 江苏神通阀门股份有限公司 | Long -range fault diagnostic of valve based on internet of things |
| CN205534498U (en) * | 2016-03-30 | 2016-08-31 | 温州市沃力机车部件有限公司 | Solenoid valve |
-
2016
- 2016-10-31 CN CN201610932511.6A patent/CN108019555A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030033848A1 (en) * | 2001-08-08 | 2003-02-20 | Industrial Scientific Corporation | Method and apparatus for diagnosing gas sensors |
| KR20110120852A (en) * | 2011-09-28 | 2011-11-04 | 주식회사 조흥밸브앤파이프 | Water valve measuring water pressure and transmitting wireless data |
| CN103032626A (en) * | 2012-12-12 | 2013-04-10 | 济南大学 | System and method for diagnosing fault of adjusting valve |
| CN103336189A (en) * | 2013-05-24 | 2013-10-02 | 中国人民解放军第二炮兵工程大学 | Solenoid valve fault diagnostic method based on current detection |
| CN204437319U (en) * | 2015-01-13 | 2015-07-01 | 永嘉县中川泵阀制造有限公司 | A kind of gate valve that automatically can detect the valve plate life-span |
| CN205506374U (en) * | 2016-03-01 | 2016-08-24 | 江苏神通阀门股份有限公司 | Long -range fault diagnostic of valve based on internet of things |
| CN205534498U (en) * | 2016-03-30 | 2016-08-31 | 温州市沃力机车部件有限公司 | Solenoid valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113466585A (en) * | 2021-06-22 | 2021-10-01 | 北京化工大学 | Pulse excitation-based online detection method for external characteristics of in-service pneumatic stop valve |
| CN113466585B (en) * | 2021-06-22 | 2023-12-15 | 北京化工大学 | Online detection method for external characteristics of in-service pneumatic stop valve based on pulse excitation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107515105B (en) | Electromagnetic valve fault diagnosis method based on plunger vibration signal | |
| US20170350535A1 (en) | Methods of fault detection for solenoid valves | |
| EP2551684B1 (en) | Method and device for testing solenoid valves | |
| US4805451A (en) | System for evaluating the condition and performance of a valve and valve operator combination | |
| RU2758717C1 (en) | Device and method for diagnosis of solenoid valves | |
| EP0303964B1 (en) | System for evaluating the condition and performance of a valve and valve operator combination and sensor for measuring forces on a valve stem | |
| US5583434A (en) | Method and apparatus for monitoring armature position in direct-current solenoids | |
| US20110241692A1 (en) | Relay end-of-service-life forecasting device | |
| EP2724121B1 (en) | Electromagnetic actuators and monitoring thereof | |
| CN102216661A (en) | Solenoid valve with sensor for determining stroke, velocities and/or accelerations of a moveable core of the valve as indication of failure modus and health status | |
| CA2138724A1 (en) | Solenoid operated valve diagnostic system | |
| CN105673923A (en) | Lataching valve assembly having position sensing | |
| CN105676127A (en) | Fault detection method and device for asynchronous motor | |
| Jo et al. | Model-based fault detection method for coil burnout in solenoid valves subjected to dynamic thermal loading | |
| US20230052987A1 (en) | System and method for solenoid valve optimization and measurement of response deterioration | |
| Liniger et al. | Early detection of coil failure in solenoid valves | |
| CN108019555A (en) | A kind of solenoid valve fault diagnostic method based on force sensor signals | |
| CN114166731A (en) | Evaluation method for tolerance performance of epoxy resin layer of dry-type vehicle-mounted traction transformer | |
| US8854068B2 (en) | Diagnostic method for oil-filled electrical device, diagnostic device for implementing the diagnostic method, and oil-filled electrical device provided with the diagnostic device | |
| JPH08124751A (en) | Method for diagnosing service life and abnormality of oil-immersed electric equipment | |
| Kryter | Nonintrusive methods for monitoring the operational readiness of solenoid-operated values | |
| JP2022534385A (en) | How to predict failure of elementary relays | |
| TWI757697B (en) | Control rod drive mechanism diagnostic tool using voltage and current recordings and diagnostic method of using such tool | |
| JP2017514136A (en) | Method and system for detecting the integrity of windings for electromagnetic devices | |
| CN109599247B (en) | Displacement self-detection switch electromagnet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180511 |
|
| RJ01 | Rejection of invention patent application after publication |