CN87201238U - Arc suppressing self-cleaning type control button - Google Patents

Abstract

Disclosed is an arc suppressing self-cleaning type control button, belonging to a switch element with a single direction propulsion, which is a low-voltage master switch, comprising a press-button head [1], a screw nut [2], a spring [3], an upper end cover [4], a lower end cover [5], a transparent cover [6], a movable contact [7], a static contact [8], a permanent magnetic field electric arc device [9], a wiring component [10] and a press-button core. A control button with a rupturing capacity which is as 6 to 11 times as the existing control button is provided; owing to good electric arc performance, the service life of the control button is evidently prolonged, range of use is enlarged, and electric control circuit is also simplified.

Description

Arc suppressing self-cleaning type control button

The utility model relates to a kind of switch block with folk prescription to propelling, specifically, is arc extinguishing self-cleaning type push-button switch, and the owner makes electrical equipment.

Control button is a kind of master control electrical apparatus, be mainly used in remote operation contactor, starter, adjuster and relay etc. and have the electrical equipment of control coil, or be used for sending the circuit of signal and electrical interlock, for example, be widely used in the electric distribution device and electric control loop of industrial enterprise such as power plant, power supply administration, chemical plant, iron and steel enterprise and oil refining industry.Present commercially available control button, existing series of products.Common control button has types such as open type, protection, water-proof type, anticorrosion formula, key formula, rotary, urgent formula, band lamp formula and self-sustaining; their structure; generally all form by button, back-moving spring, contact, shell and support coupling part; the contact number from one often open one normally closed often open to six six normally closed; increase the contact number, adopt the cordwood system type expansion.Existing this mechanical botton switch, because the requirement of dynamic thermal stability and fail safe, its rated voltage exchanges 50～60 hertz, 500 volts of voltages, 440 volts of direct voltages, 5 amperes in electric current, rupturing capacity is restricted, in use, electric arc appears in regular meeting, for example, LA-2 type button, when cutting off 220 volts of direct currents, during 2.5～3 amperes ohmic load, tangible arcing appears; LA-20-22 type button when cutting off the ohmic load of 220 volts, 1 ampere of direct current, has tangible arcing, when the D.C. resistance load is increased to 220 volts, 3 ampere-hours, only moves once just to be burnt out by electric arc.Because the restriction of rupturing capacity usually needs to go by electromagnetic switch the start and stop of control load, this obviously makes circuit increase electric elements, reduce the reliability in loop and increase expense.Long when service time one, collection has dust on the contact, and contact performance is worsened, and it is more serious to produce electric arc.It is to be noted especially, the electric arc that produces when cutting off switch, reduction of service life not only, and, for inflammable and explosive occasion, can cause serious security incident.

The purpose of this utility model provides a kind of control button simple and convenient, energy self-cleaning arc extinguishing of making.

The utility model is to implement like this: set up the permanent-magnetic field extinguisher in existing control button 1.; 2. the press points contact that changes original contact is for pushing sliding plug wire contact.Like this, the electric arc that split key produces is subjected to the effect of permanent-magnetic field, is sharply elongated and extinguishes rapidly; Adopt the contact way of contact of the present utility model, can wipe grey dust automatically during operation, have the usefulness of self-cleaning.Plain edition control button of the present utility model comprises button head (1), nut (2), spring (3), upper end cover (4), bottom end cover (5), translucent cover (6) movable contact bridge (7), fixed contact (8), permanent-magnetic field extinguisher (9), connecting part (10) and button core (11).When increasing contact and counting, available cordwood system type expansion.For closed type control button of the present utility model, as long as increase seal member again.

The utility model has the advantages that: 1. rupturing capacity obviously increases.Under volume condition about equally, the utility model is bigger 5～10 times than existing control button rupturing capacity, and switching frequency can improve more than the twice; 2. long service life, the inventor once carried out overload test to the close control button of volume size, when the D.C. resistance load of cutting off 220 volts, 10 amperes, it is 50 times/minute that the utility model can reach 10,000 to 40,000 times, switching frequency, and LA-2 type control button can only switch 36 times, and switching frequency is 20 times/minute; 3. big owing to the utility model rupturing capacity, so, in some circuit, can save auxiliary relay or small-power contactor, electric loop is simplified, improve the reliability of circuit and saved spending; 4. the utility model is easy to constitute sealing, waterproof, anti-riot type button, and cost is lower; 5. when slowly cutting off the D.C. high-current load, tangible arcing phenomenon can not take place in the utility model.

Fig. 2 (1), (2), (3), (4), (5), (6) are three kinds of different structure schematic diagrames of the utility model permanent-magnetic field extinguisher (9), Fig. 2 (1), (2) are single layer structure, there are four magnet pieces (12), Fig. 2 (3), (4) to be double-decker, have eight magnet pieces (12), figure (5), (6) for three-decker, have 12 magnet pieces (12).

Fig. 1,3,4 and 5 is the utility model different structure schematic diagrames.

Provide embodiment of the present utility model below, details of the present utility model further is provided.

Example 1, (1) according to Fig. 1 and Fig. 2, (2), formation one are often driven a normally closed control button.Among Fig. 2, permanent-magnetic field extinguisher (9) comprises extinguisher main body (13) and permanent-magnet block (12).Permanent-magnet block (12) divides N polarity piece and S polarity piece, occurs totally two pairs in pairs.Extinguisher main body (13) is a hollow circular cylinder, makes by insulating material, and for example, be the bakelite hollow circular cylinder.Upper and lower side appropriate location in extinguisher main body (13), the settlement that the fixed contact (8) of two groups of symmetries is arranged, connect one group of symmetric points and make a strip groove, stroke track for movable contact bridge (7), two groups of mutually perpendicular square grooves are arranged in the middle of strip groove, be used for settling permanent-magnet block (12), strip groove and square groove are perpendicular, simultaneously, the upper and lower side of extinguisher main body (13) has external screw thread, suitable with the internal thread of upper end cover (4) and bottom end cover (5) respectively, reach mechanical connection closely.Fixed contact (8) becomes " Ω " shape contact, totally four by the p-cu peel punching out of 0.2～0.5 millimeters thick.Button head in Fig. 1 (1) and button core (11) are linked to be an integral one-step molding, concentric cylinder, appropriate location, middle and lower part at button core (11), promptly with normally closed group of suitable place of fixed contact (8), have one with the perpendicular perforation of button core (11) axle, be used for settling movable contact bridge (7), the diameter in hole is about 3～5 millimeters, movable contact bridge (7) is made by brass, and is cylindrical.Nut (2) is formed by bakelite or plastics compacting, spring (3) adopts common spring, be used for making button head (1) and button core (11) to reset, upper end cover (4) is a hollow circular cylinder, internal diameter is greater than button core (11), there is the external screw thread that matches with nut (2) its upper end, its lower end has with the upper external screw thread of extinguisher main body (13) suitable, make with insulating material, for example, form with the bakelite powder compacting, button bottom end cover (5) is a hollow circular cylinder, and there is internal thread its upper end, realize tightly connecting with the machinery of arc extinguishing main body (13), its lower end back cover also is close to knot with connecting part (10), and this routine connecting part (10) is that female binding post embeds binding post when compacting bottom end cover (5) with brass unit's car system.Translucent cover (6) is the cylindrical sleeve that transparent plastic is made, and covers in the outside of extinguisher main body (13).

Example 2 constitutes two control buttons of often opening two normally closed interlocks according to Fig. 1 and Fig. 2 (3), (4).The present embodiment difference from Example 1 is: 1. the magnet piece (12) in the permanent-magnetic field extinguisher (9) is eight, constitutes four groups of magnetic fields, and is corresponding with eight fixed contacts (8).The inwall of extinguisher main body (13) has into the square groove of two-layer installation magnet piece (12); 2. have two on the button core (11) and can adorn the hole of movable contact bridge (7) respectively, and suitable distance is arranged, the stroke orbit plane of two movable contact bridges (7) becomes 90 ° of angles; 3. the binding post that constitutes connecting part (10) is eight altogether.

Example 3, to constitute connecting part (10) according to Fig. 3 be the plug-in type control button, be that connecting part (10) is made up of connection plug (14) and connector socket (15), they are adaptive mutually, one and the tight mechanical connection of bottom end cover (5) in them, and another has independent part of one's own.Like this, be convenient to user installation and zap button.

Example 4, constitute three according to Fig. 1 and Fig. 2 (5), (6) and often drive three normally closed control buttons, be: 1. in the extinguisher (9) 12 magnet pieces (12) are arranged, divide on three layers of inwall that is installed on extinguisher main body (13) with the difference of example 2; 2. 12 fixed contacts (8) are arranged; 3. three movable contact bridges (7) are housed on button core (11), their stroke orbit plane becomes 60 ° of angles; 4. the binding post on the connecting part (10) has 12.

Example 5, provide the contact number according to Fig. 4 and be not less than four and often drive four normally closed control buttons.Its basic structure is identical with above-mentioned each example, just adopts modular construction, increases the number of extinguisher (9) and connecting part (10), reaches the purpose of expansion control button contact number.

Example 6, provide sealing, waterproof, explosion-proof type control button embodiment according to Fig. 5.This example is with example 1 difference: 1. button core (11) is positioned at upper end cover (4) punishment and is slit into two parts up and down, its upper part and button head (1) are into a single integrated structure, install sealed rubber barrier film (16) additional at the place of cutting apart; 2. spring (2) connects mutually with the lower end of button core (11); 3. bottom end cover (5) and connecting part (10) are sealed by sealed wiring cover (17).

Claims (6)

1, arc extinguishing self-cleaning type control button, belong to master control electrical apparatus, comprise button head [1], nut [2], spring [3], upper end cover [4], bottom end cover [5], translucent cover [6], movable contact bridge [7], fixed contact [8], connecting part [10] and button core [11], it is characterized in that:

A, said button also have permanent-magnetic field extinguisher [9],

B, said magnetic field extinguisher [9] comprise extinguisher main body [13] and permanent-magnet block [12], main body [13] for two ends have externally threaded hollow cylinder, make by insulating material, fixed contact [8], corresponding normally closed and often open between the riding position of fixed contact [8] strip groove is arranged can be settled in its inner surface upper and lower side appropriate location, and it is perpendicular with the square groove of laying permanent-magnet block [12];

C, said button head [1] and button core [11] are the concentric circles cylinders;

D, said fixed contact [8] are " Ω " shape;

E, said movable contact bridge [7] are cylindrical, are positioned at button core [11] and go up the appropriate location, become the sliding inserted type line to contact with fixed contact [8];

The hollow cylinder that f, said upper end cover [4] are made for insulating material, its upper end has the internal thread of external screw thread and nut [2] to match; Its lower end has the upper external screw thread of internal thread and extinguisher main body [13] to match; Its internal diameter is greater than button core [11],

The hollow cylinder that g, said bottom end cover [5] are made for insulating material, its upper end internal thread and extinguisher main body [13] lower end external screw thread match; Its lower end back cover, and be close to knot with connecting part [10].

2, according to the described control button of claim 1, it is characterized in that the permanent-magnet block (12) in the described permanent-magnetic field extinguisher (9), per four is one deck, corresponding to a movable contact bridge (7) and four fixed contacts (8).

3,, it is characterized in that said fixed contact (8) adopts the p-cu peel of 0.2～0.5 thickness to make according to the described control button of claim 1.

4,, it is characterized in that said movable contact bridge (7) is circle copper rod shape according to the described control button of claim 1.

5, according to the described control button of claim 1, it is characterized in that said connecting part (10) is to embed the binding post of bottom end cover (5) lower end or comprise plug (14) and the connecting part of socket (15), its socket (15) becomes tight mechanical connection with bottom end cover (5).

6, the arc extinguishing self-cleaning closed type control button of claim 1, it is characterized in that button core (11) locates to be divided into up and down two partly in upper end cover (4) scope, its place of cutting apart has sealed rubber barrier film (16), bottom end cover (5) and connecting part (10) to be covered with sealed wiring cover (17).

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