CN2099377U

CN2099377U - Magnetic proximity switch

Info

Publication number: CN2099377U
Application number: CN 91224759
Authority: CN
Inventors: 钱国仁
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-09-06
Filing date: 1991-09-06
Publication date: 1992-03-18

Abstract

The utility model discloses a magnetic proximity switch used for pull rope alarm for rubber belt for conveyers off tracking and accidents, comprising a shield roller, a connecting plate or a stress mechanism comprising a pendulum plate and a pull ring, a casing, a rotation shaft, a torsional spring, sensing elements and a back cover. The sensing elements comprises a magnetism steel frame and a magnetic steel sealed with epoxy resin, and an induction apparatus frame and a dry reed pipe sealed with epoxy resin. The deflection of the stress mechanism prompts the magnetic steel close to the dry reed pipe, making the reed magnetized, and the switch attracts and is converted, sending alarm signal. Because the reed of the dry reed pipe is positioned in vacuum in the design, and not influenced by dust and moisture, the stability and reliability of emitting in adverse environment is guaranteed, avoiding accident and accelerating the modernization of transmitting coal programmed control.

Description

Magnetic proximity switch

The utility model relates to the protective device of warning of rubber conveyer rubber belt from deviating and accident alarming.

The rubber belt from deviating and the accident alarming device of existing rubber conveyer are by being subjected to force mechanisms to drive rotating shaft, and the cam in the rotating shaft rises the roller of travel switch, reaches the warning purpose thereby send signal.Because this product is used for many dirt, humidity, outdoor adverse circumstances that corrosivity is strong; and the degree of protection of domestic small-sized travel switch has only IP44; use after three months; all send the signal of tripping or malfunction, have a strong impact on operate as normal program control, the collection control, as conveyor trip switch because of the switch corrosion; must be before accident takes place timely warning emergency shutdown; and the travel switch tripping will cause the serious people machine of dying to ruin accident, and loss is hardly imaginable.Simultaneously, provide incorrect signal, make computer send false command, cause the whole system confusion, have to be forced to stop using program control, make China fail the program control world level of being unable to catch up with of coal because the protective device detecting element is malfunctioning.

The purpose of this utility model is to avoid the defective of prior art and provides a kind of not to be subjected to stable and reliable operation magnetic control that adverse circumstances influence near switch.

Embodiment of the present utility model is to the bump that is subjected to force mechanisms or find that accident potential artificially spurs steel cable and makes and swung by force mechanisms by rubber belt from deviating, drive the deflection of magnet steel frame by rotating shaft deflection thereupon, the deflection angle size regulates in advance, when magnet steel during near the tongue tube in the inductor frame, the reed magnetization, alarm signal is sent in switch adhesive conversion.

The magnetic control of pressing the utility model design because the tongue tube spring strip contact is among the vacuum, is not subjected to dust, moisture effect near switch, the stability and the reliability of abominable operational environment sender have been guaranteed, avoid the accident generation, accelerated the defeated program control modernized paces of coal, created good social benefit.

Description of drawings.

Fig. 1 is embodiment 1 structural representation.

Fig. 2 is embodiment 1 a sensing element relative position Pareto diagram.

Fig. 3 is embodiment 2 structural representations.

According to above-mentioned accompanying drawing embodiment, the utility model is done as detailed below.

Magnetic control is fixedlyed connected with square tenon or bearing pin near rotating shaft (9) external part in being subjected to force mechanisms and being contained in housing (2) of switch (referring to Fig. 1-3), and housing (2) adopts senior aluminium alloy high pressure die casting to form intensity height, in light weight.Impel (8) one of torsion springs that resetted by force mechanisms to insert housing (2), the disk border of rotating shaft (9) is inserted in the other end, on the cantilever end of rotating shaft (9) sensing element is housed, and be enclosed in and the bonnet (7) of housing (2) sealing and fixing in, its sensing element by be fixed in the rotating shaft (9) magnet steel frame (6) and with the magnet steel (5) after the epoxide resin vacuum sealing and be fixed on the inductor frame (4) of housing (2) top external part and form with the tongue tube (3) after the epoxide resin vacuum sealing.

Embodiment 1(sees Fig. 1) the force mechanisms that is subjected to be formed by fixedly connecting by connector by retaining roller (1) and connecting plate (10), two cover bearings are housed in the retaining roller (1), and add labyrinth seal, guaranteed to rotate flexible and sealing.Two tongue tubes are housed in the inductor frame (4), its relative position Pareto diagram sees Fig. 2 for details, decides according to the degree of carrying rubber belt from deviating, when rubber belt from deviating impels magnet steel (5) deflection, the angle α that forms with tongue tube is during more than or equal to 20 °, send primary alarm, magnet steel (5) just sends secondary and reports to the police when continuing deflection β=15 ° again, angle α is according to the customer requirements adjustment, conveyer is used for the occasion of degree of precision, and α should select littler, otherwise big.It is applied to the warning of travelling belt sideslip, is provided with in the adhesive tape bilateral symmetry.

Embodiment 2(sees Fig. 3) be subjected to draw ring (11) hinged form of force mechanisms by balance (12) and two ends thereof.Sensing element tongue tube (3) adopts 1.It is applied to the protective device of accident emergency shutdown; be bidirectional-movement; arbitrarily pulling one to or spur two-way simultaneously; all can send stopping signal; its effective control distance is 80 meters, should take the circumstances into consideration to reduce the distance to acclive conveyer, and the redness cover that links to each other with draw ring (11) is moulded steel wire rope and is arranged in parallel along adhesive tape; be arranged on any side of adhesive tape, as long as handled easily.

Claims

1, a kind of magnetic control is near switch, rotating shaft (9) external part in being subjected to force mechanisms and being contained in housing (2) is fixedlyed connected, (8) one of torsion springs insert housing (2), rotating shaft (9) is inserted in the other end, on the cantilever end of rotating shaft (9) sensing element is housed, and be enclosed in the bonnet (7) of fixedlying connected with housing (2), it is characterized in that described sensing element by be fixed in the rotating shaft (9) magnet steel frame (6) and with the magnet steel (5) of epoxy sealing and be fixed on the inductor frame (4) of housing (2) top external part and form with the tongue tube (3) of epoxy sealing.

2, switch as claimed in claim 1 is characterized in that the described force mechanisms that is subjected to is formed by fixedly connecting by retaining roller (1) and connecting plate (10).

3, switch as claimed in claim 1 is characterized in that described hinged the forming of draw ring (11) that is subjected to force mechanisms by balance (12) and two ends thereof.

4, switch as claimed in claim 1 or 2 is characterized in that the tongue tube (3) that has two angles to arrange for the β relative position in the inductor frame (4).