CN110513528B - Method for improving reversing speed of electromagnetic reversing valve - Google Patents
Method for improving reversing speed of electromagnetic reversing valve Download PDFInfo
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- CN110513528B CN110513528B CN201910751413.6A CN201910751413A CN110513528B CN 110513528 B CN110513528 B CN 110513528B CN 201910751413 A CN201910751413 A CN 201910751413A CN 110513528 B CN110513528 B CN 110513528B
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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
- 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
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
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- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention provides a method for improving the reversing speed of an electromagnetic reversing valve, wherein a high-voltage power supply control circuit and a low-voltage power supply control circuit are arranged in parallel in a circuit connected with a reversing coil of the electromagnetic valve; a time relay normally open contact is arranged in the high-voltage power supply control circuit, and the high-voltage power supply control circuit is powered by a power supply with 2-3 times of rated voltage; the low-voltage power supply control circuit is provided with an intermediate relay normally open contact and an isolation diode and is powered by a power supply with rated voltage; an isolation diode is disposed between the intermediate relay and the solenoid reversing coil. The method provided by the invention has the advantages that the reversing time of the high-voltage power supply is very short due to the control of the time relay, and the coil has very small heat productivity due to the fact that the coil exceeds the rated voltage, so that the coil cannot be burnt out.
Description
Technical Field
The invention belongs to the technical field of hydraulic pressure, and particularly relates to a method for improving the reversing speed of an electromagnetic reversing valve.
Background
The electromagnetic valve is industrial equipment controlled by electromagnetic force, is an automatic basic element for controlling fluid, and belongs to an actuator. The electromagnetic valves can be matched with different oil ways to realize expected control, the electromagnetic valves are various, different electromagnetic valves have different functions in a control system, and the most common electromagnetic valves are safety valves, speed regulating valves, direction control valves and the like. While the electromagnetic reversing valve generally used for direction control is the most commonly used electromagnetic valve, the reversing electromagnetic coil adopts direct current 24V, and as can be seen from the product manual of the reversing valve, when the voltage is lower than the rated 24V due to insufficient power of a power supply or other reasons, the reversing time is prolonged, and the flow is reduced.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a method for improving the reversing speed of an electromagnetic reversing valve.
In order to solve the technical problems, the technical scheme created by the invention is realized as follows:
a method for improving the reversing speed of an electromagnetic reversing valve comprises the following specific steps:
in a circuit of an electromagnetic coil connected with a reversing valve of the electromagnetic valve, a high-voltage power supply control circuit and a low-voltage power supply control circuit are arranged in parallel;
a time relay is arranged in the high-voltage power supply control circuit, and the high-voltage power supply control circuit is powered by a direct-current 48V power supply; an intermediate relay and an isolation element are arranged in a low-voltage power supply control circuit, and the low-voltage power supply control circuit is powered by a direct-current 24V power supply;
the high-voltage power supply control circuit supplies power to the electromagnetic valve reversing coil to realize the reversing of the electromagnetic valve; after the commutation, the low-voltage power supply control circuit supplies power to keep the state after the commutation.
Further, the time delay of the time relay is less than or equal to 1 second.
Further, the time relay adopts a normally open time relay.
Further, the power supply of the low-voltage power supply control circuit adopts rated voltage of a coil.
Further, the power supply of the high-voltage power supply control circuit adopts 2-3 times of rated coil voltage.
Further, the isolation element is an isolation diode.
Further, the isolation element tube is disposed between the intermediate relay and the solenoid valve reversing coil.
The invention has the advantages and positive effects that:
according to the invention, the time relay contact of the high-voltage power supply control circuit and the intermediate relay contact of the low-voltage power supply control circuit are arranged in parallel, the high-voltage power supply supplies power to the solenoid valve coil at high voltage and in short time under the control of the time relay, the electromagnetic force of the solenoid coil is improved by improving the current of the solenoid coil, the rapid reversing of the solenoid valve is realized, and the coil overheating is avoided; the holding current is increased to the solenoid valve for a long time depending on the safe rated voltage.
Drawings
FIG. 1 is a schematic structural diagram of an electromagnetic directional valve in an embodiment.
FIG. 2 is a schematic diagram of the control circuitry of the present invention;
FIG. 3 is a schematic diagram of the connection method of the present invention.
In the figure: 1-a reversing coil of the electromagnetic valve; 2-isolation diode.
Detailed Description
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
The following detailed description of the embodiments of the invention is provided.
A method for improving the reversing speed of an electromagnetic reversing valve is disclosed, as shown in figures 1 to 3, a high-voltage power supply control circuit and a low-voltage power supply control circuit are arranged in parallel in a circuit connected with a reversing coil 1 of an electromagnetic valve, the voltage of a low-voltage power supply is the rated voltage of the coil of the electromagnetic valve, and the voltage of a high-voltage power supply is 2-3 times of the rated voltage of the coil of the electromagnetic valve;
a time relay KT normally open contact is arranged in a high-voltage power supply control circuit, and the high-voltage power supply control circuit is powered by a high-voltage power supply; an intermediate relay KM normally open contact and an isolation diode 2 are arranged in a low-voltage power supply control circuit, and the low-voltage power supply control circuit is powered by a low-voltage power supply; normally, an isolation diode 2 is arranged between a normally open contact of the intermediate relay KM and a solenoid valve reversing coil in the direction shown in the figure;
after a control signal is received, the time relay and the intermediate relay coil are simultaneously electrified, the normally open contacts of the time relay and the intermediate relay are simultaneously closed by the electromagnetic force generated by the coils, and the high-voltage power supply supplies power to the electromagnetic valve coil due to the isolation effect of the isolation diode, so that the electromagnetic valve is quickly switched;
after the time relay reaches the set time, the normally open contact of the time relay is disconnected, the power supply of the high-voltage power supply is cut off, the low-voltage power supply continues to supply power to the coil of the electromagnetic valve through the isolation diode, and the reversing state is kept.
For the service performance of the electromagnetic directional valve, when the power supply voltage of the direct current electromagnetic directional valve is lower than 20% of a rated value, the valve core cannot be completely in place due to insufficient thrust generated by the electromagnet to completely open the valve port, the flow of the valve port is reduced by more than 50%, and meanwhile, the reversing time of the electromagnetic valve is prolonged due to insufficient thrust.
The thrust generated by the electromagnet is proportional to the number of turns of the coil and the current passing through the coil, so that increasing the supply voltage can increase the current flowing through the coil to provide the thrust of the electromagnet.
The invention overcomes the technical prejudice, and exactly utilizes the mode of improving the power supply voltage to improve the current flowing through the coil to accelerate the reversing speed of the valve.
Generally, the time relay is a normally open time relay. The power supply of the low-voltage power supply control circuit adopts rated voltage of an electromagnetic coil. The power supply of the high-voltage power supply control circuit adopts a power supply with 2-3 times of rated voltage.
When a control signal is supplied with electricity, the intermediate relay KM for controlling the electromagnetic valve coil and the coil of the time relay KT are simultaneously electrified, the normally open point of the time relay KT is closed and the normally open point of the intermediate relay is closed simultaneously, the high-voltage power supply voltage passing through the normally open point of the closed time relay is greater than the rated voltage passing through the intermediate relay KM, due to the isolation effect of the isolation diode, the electromagnetic reversing valve coil is supplied with power by the high-voltage power supply passing through the contact of the time relay, due to the fact that instantaneous high current generated by the high voltage enables the electromagnetic reversing coil to generate electromagnetic force greater than the rated voltage, the reversing time is increased, and the reversing speed is increased.
It should be noted that, since the time delay of the time relay is not more than 1 second, the heat generation of the large current caused by the high-voltage power supply can be ignored within a certain range.
When the delay time is up, the normally-open point of the closing time relay is disconnected, a 24V power supply supplies power to the coil of the electromagnetic reversing valve through the contact of the intermediate relay and the isolation diode, so that the coil of the electromagnetic reversing valve is kept in a reversing state until the control signal is ended to lose power.
According to the invention, the high-voltage power supply control circuit supplies power to the electromagnetic valve reversing coil at an instant high voltage by arranging the time relay normally open contact of the high-voltage power supply control circuit and the intermediate relay normally open contact of the low-voltage power supply control circuit in parallel, so that the electromagnetic valve is reversed, the reversing speed is high, and the coil overheating is avoided.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be embodied in other specific forms without departing from the spirit or essential characteristics thereof.
The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (4)
1. A method for improving the reversing speed of an electromagnetic reversing valve is characterized in that:
in a circuit connected with a reversing coil of the electromagnetic valve, a high-voltage power supply control circuit and a low-voltage power supply control circuit are arranged in parallel, the voltage of a low-voltage power supply is the rated voltage of the coil of the electromagnetic valve, and the voltage of a high-voltage power supply is 2-3 times of the rated voltage of the coil of the electromagnetic valve;
a time relay normally open contact is arranged in the high-voltage power supply control circuit, and the high-voltage power supply control circuit is powered by a high-voltage power supply; the low-voltage power supply control circuit is provided with an intermediate relay normally open contact and an isolation diode and is powered by a low-voltage power supply;
after a control signal is received, the time relay and the intermediate relay coil are simultaneously electrified, the normally open contacts of the time relay and the intermediate relay are closed by the electromagnetic force of the coil, a high-voltage power supply supplies power to the electromagnetic valve coil, the electromagnetic valve is rapidly switched, and meanwhile, the high-voltage low-voltage cutting-off function is realized due to the isolation function of the isolation diode;
after the time relay reaches the set time, the normally open contact of the time relay is disconnected, the power supply of the high-voltage power supply is cut off, and the low-voltage power supply supplies power to the coil of the electromagnetic valve through the isolation diode, so that the electromagnetic valve keeps a reversing state.
2. The method for increasing the reversing speed of the electromagnetic reversing valve according to claim 1, characterized by comprising the following steps of: and the time delay of the time relay is less than or equal to 1 second.
3. The method for increasing the reversing speed of the electromagnetic reversing valve according to claim 1, characterized by comprising the following steps of: the time relay adopts a normally open time relay.
4. The method for increasing the reversing speed of the electromagnetic reversing valve according to claim 1, characterized by comprising the following steps of: the isolation diode is arranged between the intermediate relay and the solenoid valve reversing coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910751413.6A CN110513528B (en) | 2019-08-15 | 2019-08-15 | Method for improving reversing speed of electromagnetic reversing valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910751413.6A CN110513528B (en) | 2019-08-15 | 2019-08-15 | Method for improving reversing speed of electromagnetic reversing valve |
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| Publication Number | Publication Date |
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| CN110513528A CN110513528A (en) | 2019-11-29 |
| CN110513528B true CN110513528B (en) | 2021-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910751413.6A Active CN110513528B (en) | 2019-08-15 | 2019-08-15 | Method for improving reversing speed of electromagnetic reversing valve |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB623636A (en) * | 1944-12-30 | 1949-05-20 | Zellweger Uster Ag | Improvements in or relating to electrical remote-control method and system for electric circuit makers and breakers |
| CN2491190Y (en) * | 2001-07-30 | 2002-05-15 | 朱云亭 | Controller of full autoamtic hydraulic fastener |
| CN2585395Y (en) * | 2002-11-21 | 2003-11-05 | 祝琦峰 | High efficiency, energy saving, electromagnet, double DC power supply circuit |
| CN103138607A (en) * | 2013-03-22 | 2013-06-05 | 济钢集团有限公司 | High direct voltage constant current power supply safety protection device with low-voltage protection function |
| CN203067406U (en) * | 2012-12-18 | 2013-07-17 | 徐工集团工程机械股份有限公司江苏徐州工程机械研究院 | Pneumatic reversing return circuit with counting function |
-
2019
- 2019-08-15 CN CN201910751413.6A patent/CN110513528B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB623636A (en) * | 1944-12-30 | 1949-05-20 | Zellweger Uster Ag | Improvements in or relating to electrical remote-control method and system for electric circuit makers and breakers |
| CN2491190Y (en) * | 2001-07-30 | 2002-05-15 | 朱云亭 | Controller of full autoamtic hydraulic fastener |
| CN2585395Y (en) * | 2002-11-21 | 2003-11-05 | 祝琦峰 | High efficiency, energy saving, electromagnet, double DC power supply circuit |
| CN203067406U (en) * | 2012-12-18 | 2013-07-17 | 徐工集团工程机械股份有限公司江苏徐州工程机械研究院 | Pneumatic reversing return circuit with counting function |
| CN103138607A (en) * | 2013-03-22 | 2013-06-05 | 济钢集团有限公司 | High direct voltage constant current power supply safety protection device with low-voltage protection function |
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| Publication number | Publication date |
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| CN110513528A (en) | 2019-11-29 |
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