CN112984197A - Fault-monitorable electromagnetic valve - Google Patents
Fault-monitorable electromagnetic valve Download PDFInfo
- Publication number
- CN112984197A CN112984197A CN202110157955.8A CN202110157955A CN112984197A CN 112984197 A CN112984197 A CN 112984197A CN 202110157955 A CN202110157955 A CN 202110157955A CN 112984197 A CN112984197 A CN 112984197A
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- Prior art keywords
- valve core
- hollow
- insulating layer
- valve
- ceramic coating
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 92
- 229910052742 iron Inorganic materials 0.000 claims abstract description 42
- 238000012544 monitoring process Methods 0.000 claims abstract description 30
- 238000005524 ceramic coating Methods 0.000 claims abstract description 27
- 230000003068 static effect Effects 0.000 claims abstract description 22
- 239000003990 capacitor Substances 0.000 claims description 18
- 238000005299 abrasion Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Images
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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K25/00—Details relating to contact between valve members and seats
- F16K25/005—Particular materials for seats or closure elements
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
The invention discloses a fault-monitorable electromagnetic valve, which belongs to the technical field of electromagnetic valve monitoring and comprises a valve core; the valve core sleeve is arranged outside the valve core; the ceramic coating which is attached to the outer wall of the lower side of the valve core and used as a dielectric layer during wear monitoring and the insulating layer which is attached to the top of the valve core and used for isolating the signal anode and the signal cathode; the hollow moving iron is connected with the upper part of the valve core through a bolt; the spring is movably arranged in a groove at the upper part of the hollow moving iron; the hollow static iron is sleeved outside the hollow moving iron; a coil fixed outside the hollow static iron; the nut is used for fixing the coil with the upper part of the hollow static iron; the invention can utilize simple monitoring circuit, can realize the valve wear condition record by fast monitoring whether the insulating layer is damaged, also can realize by tracking the capacitance change, and can predict before the fault, simple in construction, small in volume and easy to integrate and apply.
Description
Technical Field
The invention relates to the technical field of solenoid valve monitoring, in particular to a fault-monitorable solenoid valve.
Background
The electromagnetic valve is an automatic basic element for controlling fluid flow, and is widely applied to motion control and production control of various engineering machines and production equipment such as hydraulic pressure, pneumatic pressure and the like. If the electromagnetic valve can not be judged whether to break down or not in time in the engineering, the engineering efficiency is influenced, the maintenance cost is improved, and safety accidents and property loss can be caused in serious cases. Therefore, it is very important to quickly detect and predict the failure of the solenoid valve.
The failure types of the electromagnetic valves are many, but in industrial use, the most common failures are liquid leakage caused by poor sealing effect between the valve core and the valve body, and valve core clamping stagnation or valve core clamping death caused by foreign matters existing in the valve body, and the failure states are all related to abnormal clearance of the valve core and the valve sleeve. Therefore, aiming at the problems, the invention provides a novel electromagnetic valve structure capable of automatically monitoring a fault electromagnetic valve, and the real-time measurement of the clearance of the valve core and the valve sleeve is realized.
Disclosure of Invention
According to the problems existing in the prior art, the invention discloses a fault-monitorable electromagnetic valve, which comprises a valve core, a valve body and a valve core, wherein the valve core is provided with a valve core;
the valve core sleeve is arranged outside the valve core;
the ceramic coating which is attached to the outer wall of the lower side of the valve core and is used as a dielectric layer during wear monitoring and the insulating layer which is attached to the top of the valve core and is used for isolating a signal anode and a signal cathode;
the hollow moving iron is connected with the upper part of the valve core through a bolt;
the spring is movably arranged in a groove at the upper part of the hollow moving iron;
the hollow static iron is sleeved outside the hollow moving iron;
the coil is fixed outside the hollow static iron;
the nut is connected with the upper part of the hollow static iron and used for fixing the coil;
and the fault monitoring circuit is respectively connected with the insulating layer and the outside of the hollow static iron and is used for measuring the abrasion condition of the valve core of the electromagnetic valve.
Further, the fault monitoring circuit comprises a power supply, an equivalent capacitor C and a resistor R of the ceramic coating, an LED lamp and a point detection switch; one end of the power supply is connected with the insulating layer, the other end of the power supply is connected with one end of the optional resistor R, the other end of the resistor R is connected with the hollow static iron, namely, the other end of the resistor R is connected with one end of the ceramic coating equivalent capacitor C, and is connected with the point detection switch and the LED lamp in parallel to the main loop.
Furthermore, an insulating layer is adopted at the contact part of the groove at the upper part of the valve core and the hollow moving iron.
Further, the fault monitoring circuit detects whether the insulating layer is damaged or not by rapidly monitoring whether the insulating layer is damaged or not and checks the abrasion condition by using an RC circuit, and the process is as follows:
when the point detection switch is closed, if the LED lamp is not on, the insulating layer is normal, otherwise, the insulating layer is damaged.
R is the optional resistance, and the voltmeter is connected in parallel on resistance R both sides, and real-time measurement resistance R both ends voltage utilizes embedded computer monitorable circuit R both ends voltage, is equivalent to the condenser with ceramic coating, through measuring the charge time of electric capacity, rethread formula:
obtaining the thickness d of the dielectric layer of the capacitor, namely the abrasion degree of the ceramic coating and the position of the valve core;
equation (1) is derived as follows:
the differential equation of the RC series circuit is as follows:
the time constant is obtained as:
the capacitance is defined as:
the final capacitor charging time is:
in the formula, epsilon: dielectric constant, S: the area of the opposite surface of the polar plate, namely the thickness of the ceramic coating, d: capacitance bipolar plate distance, k: constant electrostatic force, C: and (4) a capacitor.
Due to the adoption of the technical scheme, the valve core of the failure-monitorable electromagnetic valve provided by the invention adopts the newly designed ceramic coating which is used as a dielectric layer during wear monitoring, and the ceramic has the characteristics of wear resistance, corrosion resistance, adhesion resistance, high hardness, high temperature resistance and the like, so that the valve has the advantage of long service life; the joint of the valve core and the moving iron is isolated by an insulating layer and is used for isolating between a signal anode and a signal cathode, so that the interference of a valve block on a coil can be solved; the static iron with a new structure is adopted, namely, a through hole is processed at the middle position of the static iron, so that wiring is easy; the fault self-monitoring electromagnetic switch valve has the advantages that the ceramic coating on the outer side of the valve core is simple in processing technology, and can be manufactured by various processing methods such as burning coating, spraying coating, vapor deposition coating and the like.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view of a fault self-monitoring type solenoid switch valve of the present invention using a spool valve of a spool valve;
fig. 2 is a schematic diagram of the self-monitoring type electromagnetic switch valve for failure according to the present invention when a cone valve core is used.
In the figure: 1. the device comprises a valve core, 2, a valve core sleeve, 3, a ceramic coating, 4, an insulating layer, 5, hollow moving iron, 6, a spring, 7, a coil, 8, hollow static iron, 9, a nut, 10 and a fault monitoring circuit.
Detailed Description
In order to make the technical solutions and advantages of the present invention clearer, the following describes the technical solutions in the embodiments of the present invention clearly and completely with reference to the drawings in the embodiments of the present invention:
FIG. 1 is a schematic view of a fault self-monitoring type solenoid switch valve of the present invention using a spool valve of a spool valve; fig. 2 is a schematic diagram of the self-monitoring type electromagnetic switch valve for failure according to the present invention when a cone valve core is used. A kind of electromagnetic valve of fault-monitorable, including valve core 1, valve core set 2, ceramic coating 3 used for the dielectric layer used for monitoring the wearing and tearing, insulating layer 4 used for isolating between the positive and negative pole of the signal, hollow moving iron 5, spring 6, coil 7, hollow static iron 8, nut 9, fault monitoring circuit 10;
the valve core sleeve 2 is arranged inside;
the valve core 1 is arranged inside the valve core sleeve 2;
the ceramic coating 3 is attached to the outer wall of the lower side of the valve core 1; the ceramic coating 3 is used as a dielectric layer during wear monitoring, and the ceramic coating has the characteristics of wear resistance, corrosion resistance, adhesion resistance, high hardness, high temperature resistance and the like, and the ceramic coating has a simple processing technology and can be prepared by various processing methods such as a sintering coating, a spraying coating, a vapor deposition coating and the like;
the insulating layer 4 is attached to the top of the valve core 1;
the insulating layer 4 is attached to the outer wall of the upper side of the valve core 1; the hollow moving iron 5 is connected with the upper part of the valve core 1 through a bolt;
the outer part of the valve core 1 is provided with a convex structure, so that the valve core 1 can move downwards and the valve core sleeve 2 can be positioned conveniently when the electromagnetic valve is closed;
the hollow moving iron 5 is connected with the upper part of the valve core 1 through a bolt;
the spring 6 is movably arranged on a groove at the upper part of the hollow moving iron 5;
the hollow static iron 8 is sleeved outside the hollow moving iron 5;
the coil 7 is fixed outside the hollow static iron 8;
a nut 9 which is connected with the upper part of the hollow static iron 8 and is used for fixing the coil 7;
and the fault monitoring circuit is respectively connected with the outside of the insulating layer 4 and the hollow static iron 8.
The valve core sleeve 2 is in threaded connection with the hollow moving iron 5;
furthermore, an insulating layer 4 is adopted at the contact part of the upper groove of the valve core 1 and the hollow moving iron 5.
Further, the fault monitoring circuit (10) comprises a power supply, an equivalent capacitor C and a resistor R of a ceramic coating, an LED lamp and a point-detection switch. One end of the power supply is connected with the insulating layer (4), the other end of the power supply is connected with one end of the optional resistor R, the other end of the resistor R is connected with the hollow static iron (8), namely, the other end of the resistor R is connected with one end of the ceramic coating equivalent capacitor C, and is connected with the point inspection switch and the LED lamp in parallel to the main loop.
The fault monitoring circuit can rapidly monitor whether the insulating layer is damaged or not, and can also check the abrasion condition by using the RC circuit, and the process is as follows:
when the point detection switch is closed, if the LED lamp is not on, the insulating layer is normal, otherwise, the insulating layer is damaged.
Wherein R is a self-selecting resistor, ends a and b in FIG. 1 are respectively connected with the positive electrode and the negative electrode of a power supply, voltmeters are connected in parallel on two sides of the resistor R, voltages at two ends of the resistor R are measured in real time, the voltages at two ends of the R in a circuit can be monitored by using an embedded computer, a ceramic coating is equivalent to a capacitor, and the charging time of the capacitor is measured and then is determined by a formula:
the thickness d of the dielectric layer of the capacitor, namely the abrasion degree of the ceramic coating, is obtained, and when the valve core moves, the position of the valve core can be mastered in real time as the contact area between the ceramic coating on the outer side of the valve core and the valve core sleeve changes, namely S changes, and can also be reflected by the charging time t of the capacitor;
equation (2) is derived as follows:
the differential equation of the RC series circuit is as follows:
the time constant is obtained as:
the capacitance is defined as:
the final capacitor charging time is:
in the formula, epsilon: dielectric constant, S: plate facing area (ceramic coating thickness), d: capacitance bipolar plate distance, k: constant electrostatic force, C: and (4) a capacitor.
The invention can utilize a simple monitoring circuit, can quickly monitor whether the insulating layer is damaged or not, can record the valve abrasion condition by tracking the capacitance change, can predict before the fault occurs, and has simple structure, small volume and easy integration and application.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. A can monitor trouble formula solenoid valve which characterized in that: comprises a valve core (1);
the valve core sleeve (2) is arranged outside the valve core (1);
a ceramic coating (3) which is attached to the outer wall of the lower side of the valve core (1) and is used as a dielectric layer during wear monitoring, and an insulating layer (4) which is attached to the top of the valve core (1) and is used for isolating a signal anode from a signal cathode;
the hollow moving iron (5) is connected with the upper part of the valve core (1) through a bolt;
a spring (6) movably mounted in a groove at the upper part of the hollow moving iron (5);
the hollow static iron (8) is sleeved outside the hollow moving iron (5);
a coil (7) fixed outside the hollow static iron (8);
a nut (9) which is used for fixing the coil (7) with the upper part of the hollow static iron (8);
and the fault monitoring circuit (10) is respectively connected with the insulating layer (4) and the outside of the hollow static iron (8) and is used for measuring the abrasion condition of the valve core of the electromagnetic valve.
2. A failure-monitorable solenoid valve according to claim 1 and also characterised by: the fault monitoring circuit (10) comprises a power supply, an equivalent capacitor C of a ceramic coating and a resistor R, an LED lamp and a point detection switch, wherein one end of the power supply is connected with the insulating layer (4), the other end of the power supply is connected with one end of the optional resistor R, the other end of the resistor R is connected with the hollow static iron (8), namely, the other end of the resistor R is connected with one end of the equivalent capacitor C of the ceramic coating and connected with the point detection switch and the LED lamp in parallel connection with the main loop.
3. A failure-monitorable solenoid valve according to claim 1 and also characterised by: the contact part of the upper groove of the valve core (1) and the hollow moving iron (5) adopts an insulating layer (4).
4. A failure-monitorable solenoid valve according to claim 2 and also characterised by: the fault monitoring circuit (10) detects the abrasion condition by an RC circuit through rapidly monitoring whether an insulating layer is damaged, and the process is as follows:
when the point detection switch is closed, if the LED lamp is not on, the insulating layer is normal, otherwise, the insulating layer is damaged.
R is the optional resistance, and the voltmeter is connected in parallel on resistance R both sides, and real-time measurement resistance R both ends voltage utilizes embedded computer monitorable circuit R both ends voltage, is equivalent to the condenser with ceramic coating, through measuring the charge time of electric capacity, rethread formula:
obtaining the thickness d of the dielectric layer of the capacitor, namely the abrasion degree of the ceramic coating and the position of the valve core;
equation (1) is derived as follows:
the differential equation of the RC series circuit is as follows:
the time constant is obtained as:
the capacitance is defined as:
the final capacitor charging time is:
in the formula, epsilon: dielectric constant, S: the area of the opposite surface of the polar plate, namely the thickness of the ceramic coating, d: capacitance bipolar plate distance, k: constant electrostatic force, C: and (4) a capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110157955.8A CN112984197A (en) | 2021-02-04 | 2021-02-04 | Fault-monitorable electromagnetic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110157955.8A CN112984197A (en) | 2021-02-04 | 2021-02-04 | Fault-monitorable electromagnetic valve |
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| CN112984197A true CN112984197A (en) | 2021-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110157955.8A Pending CN112984197A (en) | 2021-02-04 | 2021-02-04 | Fault-monitorable electromagnetic valve |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8601088D0 (en) * | 1985-01-22 | 1986-02-19 | Diesel Kiki Co | Solenoid valve |
| EP0637713A1 (en) * | 1993-08-05 | 1995-02-08 | Honeywell Ag | Diagnostic system for control- and shut-off-valves |
| US20110260085A1 (en) * | 2008-11-14 | 2011-10-27 | Asco Controls B.V. | 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 |
| CN104736858A (en) * | 2012-07-31 | 2015-06-24 | 卡特彼勒公司 | A hydraulic system with a dynamic seal |
| CN107407138A (en) * | 2015-01-30 | 2017-11-28 | 爱默生伏尔甘控股有限责任公司 | Choke valve wear monitoring system and method |
| CN109765134A (en) * | 2018-12-14 | 2019-05-17 | 大连理工大学 | A kind of inner wall of the pipe erosion corrosion monitoring device and its monitoring method |
| CN110998761A (en) * | 2017-08-29 | 2020-04-10 | 卡莫齐自动化股份公司 | Diagnostic device and method for solenoid valves |
| CN111536289A (en) * | 2020-04-29 | 2020-08-14 | 中国核动力研究设计院 | Intelligent valve position indicator and automatic compensation control method |
| CN212318914U (en) * | 2020-06-18 | 2021-01-08 | 泉州亿森机械有限公司 | Corrosion-resistant valve casting |
-
2021
- 2021-02-04 CN CN202110157955.8A patent/CN112984197A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8601088D0 (en) * | 1985-01-22 | 1986-02-19 | Diesel Kiki Co | Solenoid valve |
| EP0637713A1 (en) * | 1993-08-05 | 1995-02-08 | Honeywell Ag | Diagnostic system for control- and shut-off-valves |
| US20110260085A1 (en) * | 2008-11-14 | 2011-10-27 | Asco Controls B.V. | 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 |
| CN104736858A (en) * | 2012-07-31 | 2015-06-24 | 卡特彼勒公司 | A hydraulic system with a dynamic seal |
| CN107407138A (en) * | 2015-01-30 | 2017-11-28 | 爱默生伏尔甘控股有限责任公司 | Choke valve wear monitoring system and method |
| CN110998761A (en) * | 2017-08-29 | 2020-04-10 | 卡莫齐自动化股份公司 | Diagnostic device and method for solenoid valves |
| US20200217894A1 (en) * | 2017-08-29 | 2020-07-09 | Camozzi Automation S.p.A. | Diagnostic device and method for solenoid valves |
| CN109765134A (en) * | 2018-12-14 | 2019-05-17 | 大连理工大学 | A kind of inner wall of the pipe erosion corrosion monitoring device and its monitoring method |
| CN111536289A (en) * | 2020-04-29 | 2020-08-14 | 中国核动力研究设计院 | Intelligent valve position indicator and automatic compensation control method |
| CN212318914U (en) * | 2020-06-18 | 2021-01-08 | 泉州亿森机械有限公司 | Corrosion-resistant valve casting |
Non-Patent Citations (1)
| Title |
|---|
| 田昊,赵禹任: "高速电磁阀开启特性的光学测量", 《浙江大学学报》 * |
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Application publication date: 20210618 |
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