An inductive proximity switch

Abstract

The invention discloses an inductive proximity switch, which includes a switch body, and is characterized in that: the external wiring of the switch is detachably connected to the switch body, and the back of the switch body is provided with a mounting bracket, and the two are connected by bolts. The main body is provided with an indicator light connected to the internal circuit, and a connector is provided between the external wire and the switch body. The connector includes a plug and a socket. The socket is arranged on the switch body, and the plug is arranged at the end of the external wire. The fixed frame is provided with slot-shaped openings, through which bolts pass through the slot-shaped openings, and the bolts are threaded with hexagonal nuts, which is convenient for use and maintenance, and improves efficiency.

Description

technical field [0001] The invention relates to the field of power switches, in particular to an inductive proximity switch. Background technique [0002] The inductive proximity switch is composed of three parts: oscillator, switching circuit and amplifying output circuit. The oscillator generates an alternating magnetic field. When the metal target approaches this magnetic field and reaches the sensing distance, an eddy current is generated in the metal target, which causes the oscillation to attenuate and even stop the vibration. Oscillator oscillation and oscillation stop changes are processed by the post-stage amplifier circuit and converted into switching signals, which trigger the drive control device, so as to achieve the purpose of non-contact detection. [0003] Based on the analysis of the causes and experience of proximity switch failures over the years, we have concluded the following reasons. [0004] Environmental factors: The operating environment of the c...

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Problems solved by technology

[0004] Environmental factors: The operating environment of the coal mill is dusty, high in temperature, and large in vibration. The proximity switch is an electronic product, which is greatly affected by the ambient temperature. It often burns out after a short period of use, and the feedback signal is abnormal and cannot work normally.

[0005] Poor quality of proximity switches: At present, there are many manufacturers of this kind of proximity switches in my country, and the quality of the products is uneven. In addition, there are many fake and inferior products and OEM products, resulting in poor equipment quality and a high failure rate. Therefore, the quality of spare parts should be strengthened. and reliability are essential

[0006] The wiring of the proximity switch is complicated: at present, the proximity switch used in the factory is 220V AC two-wire wiring. When replacing the switch, the 220V power supply must be disconnected, and the switch lead wire and the cable are welded together. In order to facilitate replacement and save time, maintenance personnel often just Twist the two ends of the wires together, which will invisibly cause safety hazards of unreliable wiring. In addition, the vibration at the coal mill increases the possibility of cable disconnection, and the replacement of the switch is complicated and takes a long time, and the workload of maintenance is also increased. Personnel operations are complex

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