Visual magnetically-controlled switch

Abstract

The invention relates to a visual magnetically-controlled switch. The visual magnetically-controlled switch comprises an outer tube, two reed switches and leads, wherein the outer tube is a transparent organic glass tube with two ends sealed, and the outer tube is filled with epoxy resin; the two reed switches are connected with the leads respectively and mutually connected in the outer tube. The switch has the inner visual performance and can perform visual operation, so that the switch state is distinguished more conveniently, and hidden danger is discovered more directly; the switch is free of rust, easy to dismount and high in seal and waterproof performance and has very high applicability to severe environments of shafts under mines; the magnetizing range is wide, the detection accuracy and the action sensitivity are high, and the detection error probability is greatly decreased; the switch is simple to produce, short in molding cycle and low in production cost.

Description

technical field [0001] The invention belongs to the field of electrical control equipment, and in particular relates to a visible magnetic control switch applied in a mine hoisting system. Background technique [0002] Magnetic switch, also known as proximity switch or reed switch, uses a reed switch as the main component, and uses magnetic induction force to drive the reed switch to open and close by electric shock, so as to realize the control of the electric control line, and is widely used in electrical control. Compared with the early limit switch, it has the characteristics of small size, light weight, long life, no spark at the contact point, strong resistance to load impact, etc., and has high working reliability. It is a non-contact switch. Type fully enclosed detection switch, there are many types of products in the market, mainly used as proximity sensors, and widely used in home appliances, automobiles, communications, industry, medical, security and other field...

AI Technical Summary

Problems solved by technology

[0006] 1. The magnetic control switch on the market is packaged in a metal or completely opaque plastic shell. The state and position of the internal reed switch are invisible and cannot be observed directly. It is inconvenient for installation, adjustment, and correction of the switch position. Instruments must be used or repeated on-site tests Adjustment to determine whether the final fixed position and switch status are normal or not, which brings great inconvenience to maintenance and installation, and at the same time inevitably affects the smooth and orderly production of the main body

[0007] 2. The existing magnetic control switch products available in most markets have certain limitations on the use environment

Taking our mine as an example, the underground environment is relatively humid, especially the inner wall of the shaft seepage is as serious as rain, and the switch with poor sealing has a high failure rate. After installation and use, it is found that the adaptability is insufficient.

[0008] 3. The magnetic control switch encapsulated by the metal is easy to corrode and oxidize, resulting in weakened magnetic induction force, decreased sensitivity and even failure

The traditional metal fixing screw is easy to rust for a long time after installation. Once it fails, it is extremely difficult to disassemble and replace, and the operation is time-consuming and labor-intensive. At the same time, the metal shell is easily magnetized due to long-term magnetization, causing the switch to malfunction due to severe residual magnetism and can only be scrapped.

However, some products packaged in plastic shells have the problem of insufficient extrusion impact resistance.

[0009] 4. At present, the market provides mature magnetic control switch products that can be selected. In order to control the production cost and reduce the difficulty of production, all of them adopt the method of only packaging a single reed switch inside, so the common problem is that the magnetic field is small and the detection distance is short. The hidden danger of failure or misdetection of the only reed switch contact cannot be effectively prevented. Once the only single reed switch inside is damaged or fails, it must be replaced as a whole, so the relatively short service life and insufficient reliability

[0010] 5. The cost of a single switch is high, and the purchase price is expensive

[0011] 6. There is a long supply cycle for similar products in the purchase market. For production units equipped with large-area magnetic switches for electrical automatic control, the stage of high equipment failures will inevitably be affected by the limited amount of spare parts in stock. It is inevitable for the normal production and operation of industrial and mining enterprises. subject to its constraints

Images