CN103066979A

CN103066979A - Solid explosion-proof switch

Info

Publication number: CN103066979A
Application number: CN2013100107714A
Authority: CN
Inventors: 周昀煜
Original assignee: Quzhou Yunrui Industrial Design Co Ltd
Current assignee: Rittal electrical (Beijing) Co. Ltd.
Priority date: 2013-01-13
Filing date: 2013-01-13
Publication date: 2013-04-24
Anticipated expiration: 2033-01-13
Also published as: CN103066979B

Abstract

The invention provides a solid explosion-proof switch, and relates to an electronic explosion-proof switch. The solid explosion-proof switch is mainly formed by a light-operated module, a button and a circuit board. An infrared transmitting hole, an infrared receiving hole and a square hole slide groove are formed in the light-operated module, and the square hole slide groove perpendicularly penetrates between the infrared transmitting hole and the infrared receiving hole. An infrared transmitting tube is mounted in the infrared transmitting hole, and an infrared receiving tube is mounted in the infrared receiving hole. The button and a slide rod are connected integrally. The slide rod stretches into the square hole slide groove of the light-operated module, and a light pervious hole is formed in the front portion of the slide rod. The light pervious hole, the infrared transmitting hole and the infrared receiving hole are arranged in a staggered mode. Through the light-operated module, the button and the slide rod, a light-operated signal can be operated to trigger turn-on and turn-off of the switch, and non-contact turn-on or turn-off can all be achieved in a control loop and a load loop. Due to the fact that the switch is packaged by epoxy resin, the switch can have explosion-proof and water proof multiple functions. The solid explosion-proof switch is safe, reliable, long in service life, and is suitable for being used in special environments such as a fireproof environment, an explosion-proof environment and a waterproof environment.

Description

A kind of solid-state flame-proof switch

Technical field

The present invention relates to electronic switch, specially refer to a kind of electronic explosion-proof switch.

Background technology

Current, electronic switch is used widely, and greatly facilitates people's work and life.The main feature of electronic non-contact switch is not have movable contact component, does not occur electric arc or spark during turn-on and turn-off, is swift in motion, and the life-span is long, and reliability is high, is fit to fire prevention, the particular surroundings such as explosion-proof, moistureproof is used.

Chinese patent notification number 2107736U discloses a kind of " Contactless explosion-proof switch ", be connected between the control utmost point G and anode A of ac thyristor by current-limiting resistance by tongue tube, shifted one's position by wearing rod drive permanent magnet by knob, in order to the contact of controlling tongue tube with separate, reach conducting or the cut-off of control bidirectional triode thyristor, make the switch loop connect or open, switch deciliter the time no-spark produce.Although this utility model has the characteristics that technique is simple, cost is low, but the tongue tube of its application is contact switch, the glass shell of tongue tube breaks easily, when the glass shell of tongue tube breaks, switch will be damaged maybe can not do the flame-proof switch use, and also there is the shortcoming of poor reliability in tongue tube.

Chinese patent Granted publication CN 2565202Y discloses the utility model patent of a kind of " Zero voltage contactless explosion-proof switch ", formed by semiconductor device pressure transducer, amplitude limiter circuit, voltage follower, comparator, trigger, coupler, zero cross detection circuit and power electronic element, by make voltage signal of its output by piezoelectric ceramic, through amplitude limiter circuit its signal voltage is limited to 0.7V and is used for the trigger switch opening and closing with interior, realized the contactless control of control loop and load circuit.This utility model adopts pressure signal to trigger, solved the drawback that mechanical contact is still arranged in control circuit, but the shortcoming that exists is that circuit produces false triggering easily, because piezoelectric ceramic has highstrung characteristic, can convert sound wave and faint mechanical oscillation to the signal of telecommunication, the signal amplitude that thunder, vehicle noise and ground vibration produce will make the comparator of circuit hard to distinguish between the true and false, and therefore, this switch is interfered easily and causes to open by mistake and open or cut out by mistake.

Summary of the invention

The present invention be to provide a kind of safe and reliable, not fragile, can not produce to open by mistake and open or the mistake Contactless explosion-proof switch of closing, be fit to the particular surroundingss such as fire prevention, explosion-proof, waterproof and use.

A kind of solid-state flame-proof switch of the present invention, mainly formed by switch panel (11), light-operated assembly (12), button (15), slide bar (17), helical spring (14), wiring board (1), electronic component and back cover (10), wherein, light-operated assembly (12) and electronic component are installed on the wiring board (1), wiring board (1) is installed in the back cover (10), and back cover (10) is installed on the switch panel (11); There is circular hole at the center of switch panel (11), and the inboard of switch panel (11) is useful on the screw that back cover (10) is installed; Light-operated assembly (12) is rectangular structure, infrared emitting hole (6) is arranged on the light-operated assembly (12), infrared receiving aperture (8) and square hole chute (7), infrared emitting hole (6) and infrared receiving aperture (8) be corresponding the setting linearly, square hole chute (7) vertically passes between infrared emitting hole (6) and infrared receiving aperture (8), installation infrared line transmitting tube (VD4) in infrared emitting hole (6), infrared emission tube (VD4) points to infrared receiving aperture (8), installation infrared line receiving tube (VD5) in infrared receiving aperture (8), infrared receiver tube (VD5) is towards infrared emitting hole (6); Button (15) and slide bar (17) are connected as a single entity, button (15) is the circle structure, button (15) stretches out from the center hole of switch panel (11), slide bar (17) is cube structure, slide bar (17) extend in the square hole chute (7) of light-operated assembly (12), the front portion of slide bar (17) is inserted between infrared emitting hole (6) and the infrared receiving aperture (8), there is loophole (13) front portion of slide bar (17), shift to install between loophole (13) and infrared emitting hole (6) and the infrared receiving aperture (8), when pressing the button (15), loophole (13) and infrared emitting hole (6) and infrared receiving aperture (8) be coordination linearly, light is passed through, when button (15) when setting back, the light tight body of rod of slide bar (17) stops that every between outside line launch hole (6) and infrared receiving aperture (8) light passes through; Helical spring (14) is the back-moving spring of button (15), and helical spring (14) is installed in the rear portion of slide bar (17), the compression travel of helical spring (14) at the tail end of slide bar (17) between the end face of light-operated assembly (12);

The electronic component that is installed in wiring board (1) comprises: rectifier diode a(VD1), rectifier diode b(VD2), voltage-stabiliser tube (VD3), dropping resistor (R1), current-limiting resistance (R2), discharge resistance (R3), be close to road resistance a(R4), be close to road resistance b(R5), drive resistance (R6), decompression capacitor (C1), filtering capacitor (C2), pulse capacitor (C3), anti-interference condenser (C4), d type flip flop (IC), triode (VT) and bidirectional triode thyristor (VS), the pin leads of infrared emission tube (VD4) and infrared receiver tube (VD5) is connected on the wiring board (1), and the connected mode of circuit is:

Rectifier diode a(VD1) anodic bonding is to the ground end, rectifier diode a(VD1) negative electrode is connected to rectifier diode b(VD2) anode, rectifier diode b(VD2) negative electrode be connected respectively to the vdd terminal of d type flip flop (IC), the positive pole of anti-interference condenser (C4), the collector electrode of triode (VT), the negative electrode of infrared receiver tube (VD5), the anode of infrared emission tube (VD4), the negative electrode of voltage-stabiliser tube (VD3) and the positive pole of filtering capacitor (C2); The anodic bonding of the negative pole of filtering capacitor (C2) and voltage-stabiliser tube (VD3) is to the ground end; The negative electrode of infrared emission tube (VD4) is connected to an end of current-limiting resistance (R2), and the other end of current-limiting resistance (R2) is held with being connected to; The anode of infrared receiver tube (VD5) is connected respectively to an end of release resistance (R3) and an end of pulse capacitor (C3), the other end that discharges resistance (R3) is held with being connected to, the other end of pulse capacitor (C3) is connected respectively to the base stage of triode (VT) and is close to road resistance a(R4) an end, be close to road resistance a(R4) the other end hold with being connected to; The emitter of triode (VT) be connected respectively to anti-interference condenser (C4) negative pole, d type flip flop (IC) the CP end and be close to road resistance b(R5) an end, be close to road resistance b(R5) the other end hold with being connected to; The S of d type flip flop (IC) end, R end and VSS end end with being connected to, and the D of d type flip flop (IC) holds and is connected to d type flip flop (IC)

End; The Q end of d type flip flop (IC) is connected to an end that drives resistance (R6), and the other end that drives resistance (R6) is connected to the control utmost point of bidirectional triode thyristor (VS), and the negative electrode of bidirectional triode thyristor (VS) is held with being connected to; Circuit is by terminal stud a(L1), terminal stud b(L2) and terminal stud c(N1) be connected on the outer circuit, the anodic bonding of bidirectional triode thyristor (VS) is to terminal stud b(L2) on; Rectifier diode a(VD1) negative electrode and rectifier diode b(VD2) anodic bonding to an end of dropping resistor (R1), the other end of dropping resistor (R1) is connected to an end of decompression capacitor (C1), and the other end of decompression capacitor (C1) is connected to terminal stud c(N1) on; The ground end is connected to terminal stud a(L1) on.

Among the present invention, bulge loop (16) is arranged on the button (15), bulge loop (16) makes button (15) spacing on switch panel; The width of slide bar (17) is greater than the diameter of infrared emitting hole (6) and infrared receiving aperture (8).

Among the present invention, adopt epoxy resin wiring board (1) and electronic package in back cover (10), can guarantee when contingency switch itself damages, can not make electronic component smolder, burst, thereby can not cause the breaking out of fire of inflammable and explosive place and explosion accident.

In the foregoing circuit, dropping resistor (R1) and decompression capacitor (C1) consist of reduction voltage circuit, rectifier diode a(VD1) and rectifier diode b(VD2) consist of the Half bridge rectifier circuit, filtering capacitor (C2) and voltage-stabiliser tube (VD3) consist of filter circuit of pressure-stabilizing,～220V power supply is behind step-down, rectification and voltage regulation filtering, the circuit that offers in the switch as working power uses, in the circuit, the use of connecting of dropping resistor (R1) and decompression capacitor (C1) can be avoided decompression capacitor (C1) to be subject to rush of current and damages; Use infrared emission tube (VD4) and infrared receiver tube (VD5) to realize light-operated operation, pulse capacitor (C3) is set in the circuit, make light-operated operation signal become pulse signal, simultaneously, pulse capacitor (C3) also has anti-shake effect, because after pulse capacitor (C3) produces a pulse, capacitor (C3) must discharge electric charge just by release resistance (R3) can produce pulse again, in at this moment, any shake during action button (15) can not make pulse capacitor (C3) produce pulse; D type flip flop (IC) connects into the bistable trigger mode, when having the rising edge pulse to be input to the CP end of d type flip flop (IC), will make the Q output level upset of d type flip flop (IC), control bidirectional triode thyristor (VS) conducting or cut-off, CP input at d type flip flop (IC) arranges anti-interference condenser (C4), be low level to making the CP input of d type flip flop (IC) after capacitor (C4) charging, only have after the CP input of d type flip flop (IC) becomes low level, the rising edge pulse just can make the Q output level upset of d type flip flop (IC), in any interference signal of capacitor (C4) in the charging interval Q output level of d type flip flop (IC) is overturn, stable being operated in of switch opened or closed condition.Switch is between the operating period, be in off state such as switch, in the time of need opening switch, click button (15), make linearly coordination of the anterior loophole (13) of slide bar (17) and infrared emitting hole (6) and infrared receiving aperture (8), the infrared light emission of infrared emission tube (VD4) is to infrared receiver tube (VD5), make infrared receiver tube (VD5) reverse-conducting, make pulse capacitor (C3) produce the base stage that pulse signal is input to triode (VT), make triode (VT) conducting, anti-interference condenser (C4) is by triode (VT) repid discharge, make the CP input of d type flip flop (IC) obtain the rising edge triggering signal, the Q output output driving current of d type flip flop (IC), be input to the control utmost point of bidirectional triode thyristor (VS) by driving resistance (R6), make bidirectional triode thyristor (VS) conducting, the load plugged, behind release button (15), switch still keeps opening state; During such as the need closing switch, again click button (15), can make again the CP input of d type flip flop (IC) obtain the rising edge triggering signal and the Q output level of d type flip flop (IC) is overturn, make bidirectional triode thyristor (VS) turn-off the load deenergization.

In the above-mentioned invention, described load is illuminating lamp and low power electric appliance; Described external power is the mains supply of alternating current 220V.

The invention has the beneficial effects as follows: utilize light-operated assembly (12) and button slide bar (17) operation optically-controlled signal to come the trigger switch turn-on and turn-off, simple in structure, reliable operation can not make the switch generation open by mistake and open or the mistake shutoff operation; Use bidirectional triode thyristor (VS) element, all realize contactless being switched on or switched off at control loop and load circuit, the switch internal circuit does not have actuating mechanism, so that switch is not fragile; Adopt epoxy encapsulation, make switch have explosion-proof waterproof multi-functional.Compared with prior art, solid-state flame-proof switch safety and reliability of the present invention, longer service life is more suitable for using in particular surroundingss such as fire prevention, explosion-proof, waterproof.

Description of drawings

Fig. 1 is a kind of solid-state flame-proof switch structure chart of the present invention.

Fig. 2 is a kind of electronic type flame-proof switch circuit diagram of the present invention.

Among the figure: 1. wiring board, 6. infrared emitting hole, 7. square hole chute, 8. infrared receiving aperture, 10. back cover, 11. switch panels, 12. light-operated assembly, 13. loopholes, 14. helical springs, 15. button, the bulge loop of 16. buttons, 17. slide bars, 18. the epoxy encapsulation layer, VD1. rectifier diode a, VD2. rectifier diode b, VD3. voltage-stabiliser tube, VD4. infrared emission tube, VD5. infrared receiver tube, R1. dropping resistor, the R2. current-limiting resistance, R3. discharges resistance, R4. be close to road resistance a, R5. is close to road resistance b, and R6. drives resistance, C1. decompression capacitor, C2. filtering capacitor, C3. pulse capacitor, C4. anti-interference condenser, IC.D trigger, VT. triode, VS. bidirectional triode thyristor, H. illuminating lamp, L1. terminal stud a, L2. terminal stud b, N1. terminal stud c.

Embodiment

In the execution mode illustrated in figures 1 and 2, solid-state flame-proof switch mainly is comprised of switch panel (11), light-operated assembly (12), button (15), slide bar (17), helical spring (14), wiring board (1), electronic component and back cover (10), wherein, light-operated assembly (12) and electronic component are installed on the wiring board (1), wiring board (1) is installed in the back cover (10), adopt epoxy resin wiring board (1) and electronic package in back cover (10), back cover (10) is installed on the switch panel (11); There is circular hole at the center of switch panel (11), and the inboard of switch panel (11) is useful on the screw that back cover (10) is installed; Light-operated assembly (12) is rectangular structure, infrared emitting hole (6) is arranged on the light-operated assembly (12), infrared receiving aperture (8) and square hole chute (7), infrared emitting hole (6) and infrared receiving aperture (8) be corresponding the setting linearly, square hole chute (7) vertically passes between infrared emitting hole (6) and infrared receiving aperture (8), installation infrared line transmitting tube (VD4) in infrared emitting hole (6), infrared emission tube (VD4) points to infrared receiving aperture (8), installation infrared line receiving tube (VD5) in infrared receiving aperture (8), infrared receiver tube (VD5) is towards infrared emitting hole (6), and the pin leads of infrared emission tube (VD4) and infrared receiver tube (VD5) is connected on the wiring board (1); Button (15) and slide bar (17) are connected as a single entity, button (15) is the circle structure, button (15) stretches out from the center hole of switch panel (11), bulge loop (16) is arranged on the button (15), bulge loop (16) makes button (15) spacing on switch panel, slide bar (17) is cube structure, slide bar (17) extend in the square hole chute (7) of light-operated assembly (12), the front portion of slide bar (17) is inserted between infrared emitting hole (6) and the infrared receiving aperture (8), the width of slide bar (17) is greater than the diameter of infrared emitting hole (6) and infrared receiving aperture (8), there is loophole (13) front portion of slide bar (17), shift to install between loophole (13) and infrared emitting hole (6) and the infrared receiving aperture (8), when pressing the button (15), loophole (13) and infrared emitting hole (6) and infrared receiving aperture (8) be coordination linearly, light is passed through, when button (15) when setting back, the light tight body of rod of slide bar (17) stops that every between outside line launch hole (6) and infrared receiving aperture (8) light passes through; Helical spring (14) is the back-moving spring of button (15), and helical spring (14) is installed in the rear portion of slide bar (17), the compression travel of helical spring (14) at the tail end of slide bar (17) between the end face of light-operated assembly (12).

The electronic component that uses in the present embodiment comprises: rectifier diode a(VD1), rectifier diode b(VD2), voltage-stabiliser tube (VD3), infrared emission tube (VD4), infrared receiver tube (VD5), dropping resistor (R1), current-limiting resistance (R2), discharge resistance (R3), be close to road resistance a(R4), be close to road resistance b(R5), drive resistance (R6), decompression capacitor (C1), filtering capacitor (C2), pulse capacitor (C3), anti-interference condenser (C4), d type flip flop (IC), triode (VT) and bidirectional triode thyristor (VS), wherein, rectifier diode a(VD1) and rectifier diode b(VD2) select the silicon rectifier diode of 1N4007, voltage-stabiliser tube (VD3) is selected the silicon voltage regulator diode of 12V/0.25-0.5W, infrared emission tube (VD4) and infrared receiver tube (VD5) are selected the silicone tube of diameter 3mm, dropping resistor (R1) is selected the carbon resistance film of 47 Ω/1W, current-limiting resistance (R2) is selected the metalfilmresistor of 2K Ω/0.5W, discharge resistance (R3) and select the carbon resistance film of 47 K Ω/0.25W, be close to road resistance a(R4) and be close to road resistance b(R5) select the carbon resistance film of 4.7K Ω/0.25W, drive resistance (R6) and select the carbon resistance film of 1K Ω/1W, decompression capacitor (C1) is selected the polypropylene film capacitor of 0.22uF/630V, filtering capacitor (C2) is selected the electrolytic capacitor of 100uF/25V, pulse capacitor (C3) is selected the ceramic disc capacitor device of 2000P/25V, anti-interference condenser (C4) is selected the ceramic disc capacitor device of 0.022uF/25V, d type flip flop (IC) is selected the two rising edge d type flip flops of the CD4013 of CMOS, triode (VT) is selected the S9013 silicon triode of NPN type, and bidirectional triode thyristor (VS) is selected the bidirectional triode thyristor of 1A/600V.

The circuit connecting mode of present embodiment is:

End; The Q end of d type flip flop (IC) is connected to an end that drives resistance (R6), the other end that drives resistance (R6) is connected to the control utmost point of bidirectional triode thyristor (VS), the negative electrode of bidirectional triode thyristor (VS) is held with being connected to, and the anodic bonding of bidirectional triode thyristor (VS) is to terminal stud b(L2) on; Rectifier diode a(VD1) negative electrode and rectifier diode b(VD2) anodic bonding to an end of dropping resistor (R1), the other end of dropping resistor (R1) is connected to an end of decompression capacitor (C1), and the other end of decompression capacitor (C1) is connected to terminal stud c(N1) on; The ground end is connected to terminal stud a(L1) on; Switch is by terminal stud a(L1), terminal stud b(L2) and terminal stud c(N1) be connected on the outer circuit terminal stud b(L2) be connected to an end of load, the other end of load is connected to～neutral line (N) of 220V power supply on; Terminal stud c(N1) be connected to～neutral line (N) of 220V power supply on; Terminal stud a(L1) be connected to～phase line (L) of 220V power supply on.

Claims

1. solid-state flame-proof switch, it is characterized in that switch mainly is comprised of switch panel (11), light-operated assembly (12), button (15), slide bar (17), helical spring (14), wiring board (1), electronic component and back cover (10), wherein, light-operated assembly (12) and electronic component are installed on the wiring board (1), wiring board (1) is installed in the back cover (10), and back cover (10) is installed on the switch panel (11); There is circular hole at the center of switch panel (11), and the inboard of switch panel (11) is useful on the screw that back cover (10) is installed; Light-operated assembly (12) is rectangular structure, infrared emitting hole (6) is arranged on the light-operated assembly (12), infrared receiving aperture (8) and square hole chute (7), infrared emitting hole (6) and infrared receiving aperture (8) be corresponding the setting linearly, square hole chute (7) vertically passes between infrared emitting hole (6) and infrared receiving aperture (8), installation infrared line transmitting tube (VD4) in infrared emitting hole (6), infrared emission tube (VD4) points to infrared receiving aperture (8), installation infrared line receiving tube (VD5) in infrared receiving aperture (8), infrared receiver tube (VD5) is towards infrared emitting hole (6); Button (15) and slide bar (17) are connected as a single entity, button (15) is the circle structure, button (15) stretches out from the center hole of switch panel (11), slide bar (17) is cube structure, slide bar (17) extend in the square hole chute (7) of light-operated assembly (12), the front portion of slide bar (17) is inserted between infrared emitting hole (6) and the infrared receiving aperture (8), there is loophole (13) front portion of slide bar (17), shift to install between loophole (13) and infrared emitting hole (6) and the infrared receiving aperture (8), when pressing the button (15), loophole (13) and infrared emitting hole (6) and infrared receiving aperture (8) be coordination linearly, light is passed through, when button (15) when setting back, the light tight body of rod of slide bar (17) stops that every between outside line launch hole (6) and infrared receiving aperture (8) light passes through; Helical spring (14) is the back-moving spring of button (15), and helical spring (14) is installed in the rear portion of slide bar (17), the compression travel of helical spring (14) at the tail end of slide bar (17) between the end face of light-operated assembly (12);

Rectifier diode a(VD1) anodic bonding is to the ground end, rectifier diode a(VD1) negative electrode is connected to rectifier diode b(VD2) anode, rectifier diode b(VD2) negative electrode be connected respectively to the vdd terminal of d type flip flop (IC), the positive pole of anti-interference condenser (C4), the collector electrode of triode (VT), the negative electrode of infrared receiver tube (VD5), the anode of infrared emission tube (VD4), the negative electrode of voltage-stabiliser tube (VD3) and the positive pole of filtering capacitor (C2); The anodic bonding of the negative pole of filtering capacitor (C2) and voltage-stabiliser tube (VD3) is to the ground end; The negative electrode of infrared emission tube (VD4) is connected to an end of current-limiting resistance (R2), and the other end of current-limiting resistance (R2) is held with being connected to; The anode of infrared receiver tube (VD5) is connected respectively to an end of release resistance (R3) and an end of pulse capacitor (C3), the other end that discharges resistance (R3) is held with being connected to, the other end of pulse capacitor (C3) is connected respectively to the base stage of triode (VT) and is close to road resistance a(R4) an end, be close to road resistance a(R4) the other end hold with being connected to; The emitter of triode (VT) be connected respectively to anti-interference condenser (C4) negative pole, d type flip flop (IC) the CP end and be close to road resistance b(R5) an end, be close to road resistance b(R5) the other end hold with being connected to; The S of d type flip flop (IC) end, R end and VSS end end with being connected to, and the D of d type flip flop (IC) holds and is connected to d type flip flop (IC) End; The Q end of d type flip flop (IC) is connected to an end that drives resistance (R6), and the other end that drives resistance (R6) is connected to the control utmost point of bidirectional triode thyristor (VS), and the negative electrode of bidirectional triode thyristor (VS) is held with being connected to; Circuit is by terminal stud a(L1), terminal stud b(L2) and terminal stud c(N1) be connected on the outer circuit, the anodic bonding of bidirectional triode thyristor (VS) is to terminal stud b(L2) on; Rectifier diode a(VD1) negative electrode and rectifier diode b(VD2) anodic bonding to an end of dropping resistor (R1), the other end of dropping resistor (R1) is connected to an end of decompression capacitor (C1), and the other end of decompression capacitor (C1) is connected to terminal stud c(N1) on; The ground end is connected to terminal stud a(L1) on.

2. a kind of solid-state flame-proof switch according to claim 1 is characterized in that bulge loop (16) is arranged on the button (15), and bulge loop (16) makes button (15) spacing on switch panel.

3. a kind of solid-state flame-proof switch according to claim 1 is characterized in that the width of slide bar (17) is greater than the diameter of infrared emitting hole (6) and infrared receiving aperture (8).

4. a kind of solid-state flame-proof switch according to claim 1, it is characterized in that adopting epoxy resin wiring board (1) and electronic package in back cover (10).