Device and method for detecting stuck solenoid valve
A technology for electromagnetic reversing valves and stuck valves, which is applied in the direction of fluid pressure actuation devices, fluid pressure actuation system testing, mechanical equipment, etc., and can solve problems such as increasing the volume of electromagnetic reversing valves, small detection range, and inconvenient installation , to achieve the effect of network control, strong functionality and comprehensive functions
Active Publication Date: 2022-03-04
HYDRAULIK POWER
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Problems solved by technology
[0005] Add a proximity switch, and at the same time, it is necessary to redefine the structure of the reversing valve, which increases the cost;
[0006] The proximity switch is connected to the electromagnetic reversing valve, which increases the volume of the electromagnetic reversing valve. If two-way detection is required, the volume is larger and the installation is inconvenient;
[0007] Since the proximity switch only detects a certain position of the spool, the detection range is small
Method used
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Embodiment Construction
[0033] The present invention will be further described now in conjunction with accompanying drawing.
[0034] see figure 1 , figure 1 Shown is one embodiment of the invention. The electromagnetic reversing valve 2 in this embodiment is an existing common two-position four-way electromagnetic reversing valve, which is mainly composed of an electromagnetic coil 15, an electromagnet 16, a spool 18, a return spring 19 and 20, a valve body 21, a sealing Head 22 composition.
[0035] Its working principle is that when the electromagnetic coil 15 is energized, a magnetic field is generated to act on the electromagnet 16, and the armature 17 inside it moves to the left under the action of the magnetic field and pushes the spool 18, and the spool 18 overcomes the spring force of the return spring 19 to go Move to the left, switch the circuit, and at the same time, the movement stroke s of the armature 17 gradually increases to the left; when the electromagnetic coil 15 is de-energiz...
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A device and method for detecting stuck valves of electromagnetic reversing valves. The current detection unit samples and processes the current change trend and magnitude during the electrification process, continuous electrification process, and power-off process of the electromagnetic coil; Set the parameters for comparison, if it is within the preset parameter range, output a normal signal; if it exceeds, output a fault signal; the logic control unit controls the on-off of the power switch device; the method of detecting the stuck valve of the electromagnetic reversing valve: the electromagnetic coil Sample the change trend and size of the loop current; if it is a fault, disconnect the electromagnetic coil; if it is not a fault, keep it on. The present invention adopts the method of directly detecting the loop current of the electromagnetic coil, and achieves the purpose of detecting whether the action of the electromagnetic directional valve is normal by comparing the change trend and size of the loop current of the electromagnetic coil when the electromagnetic directional valve operates normally and abnormally.
Description
technical field [0001] The invention relates to the field of electromagnetic reversing valves, in particular to a device and method for detecting stuck electromagnetic reversing valves. Background technique [0002] As a hydraulic component that can control the flow direction and on-off of hydraulic oil and other media, electromagnetic reversing valve is widely used in injection molding machines, machine tools, construction machinery and other host machines, and is indispensable. During the working process of the electromagnetic reversing valve, due to the influence of the different working conditions of the main engine, the aging of the medium, the internal wear, the infiltration of external impurities and other factors, the spool of the electromagnetic reversing valve will be stuck, resulting in the inability to reversing, thus It directly affects the working condition of the main engine, and even has a fatal impact; therefore, it is very important to detect the stuck valv...
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IPC IPC(8): F15B19/00
CPCF15B19/005
Inventor 陈家豪彭敏
Owner HYDRAULIK POWER