CN105990814B

CN105990814B - Sequential firing circuit

Info

Publication number: CN105990814B
Application number: CN201510177237.1A
Authority: CN
Inventors: 王君峰
Original assignee: STAR SEIKI (XIANGYANG) Co Ltd
Current assignee: STAR SEIKI (XIANGYANG) Co Ltd
Priority date: 2015-04-15
Filing date: 2015-04-15
Publication date: 2018-05-01
Anticipated expiration: 2035-04-15
Also published as: CN105990814A

Abstract

A kind of sequential firing circuit, for automation field.Power supply circuit, sequential firing circuit, controlled cell circuit are serially connected.The present invention is serially connected among power supply circuit and controlled cell circuit and is used by the simple sequential firing circuit of the compositions such as firing switch, emergency stop switch and relay.Under normal circumstances, firing switch directly controls controlled cell circuit.Recover after main power source dead electricity; or when being resetted after emergent stopping again; controlled cell circuit will not start automatically; it must can just make controlled cell circuit normal starting according to certain operation order; the power-off protection function of controlled cell can be easily achieved, while the normal function of firing switch will not be influenced.

Description

Sequential firing circuit

Technical field

The present invention relates to automatic control technology field, is specifically a kind of hardware-in-the-loop that must be started in order, and outside When recovering after portion's power cut-off again, the self-running protective loop of equipment will not be caused.

Background technology

The existing firing switch with maintenance, under powering-off state, it is impossible to cutoff circuit, when power supply recovers again, by The circuit of control can also obtain electric, cause equipment self-starting, no power-off protection function.

The content of the invention

For overcome the deficiencies in the prior art, goal of the invention of the invention be to provide a kind of sequential firing circuit, it can be achieved that The sequential firing in circuit, and after external power supply power-off and recovery, equipment self-starting will not be caused.

To achieve the above object, power supply circuit of the invention, sequential firing circuit, controlled cell circuit are serially connected in Together；The firing switch PB in the sequential firing circuit is made of normally opened contact and normally-closed contact；Relay R1 is by relay R1 Coil is formed with relay R1 normally opened contacts one, relay R1 normally opened contacts two；Relay R2 is by relay R2 coils, relay R2 normally opened contacts one, relay R2 normally opened contacts two form；The main power source and relay R1 normally opened contacts one of power supply circuit, Relay R1 normally opened contacts two, the load in controlled cell circuit are serially connected；Firing switch PB normally opened contacts, relay R2 are normal Open contact one, the series connection of relay R1 coils, the other end of firing switch PB normally opened contacts and relay R1 coils respectively with main electricity The both ends connection in source；Firing switch PB normally-closed contacts, emergency stop switch EMG normally-closed contacts, the series connection of relay R2 coils, relay Device R2 normally opened contacts two are simultaneously connected in the both ends of firing switch PB normally-closed contacts, firing switch PB normally-closed contacts and relay R2 coils The other end be connected respectively with the both ends of main power source；In main power source normal power supply and emergency stop switch EMG resets, press Dynamic switch PB, controlled cell circuit obtain electric, closing firing switch PB, the power-off of controlled cell circuit；Recover after main power source dead electricity Power supply, or emergency stop switch EMG action after again reset when, controlled cell circuit will not therewith it is electric, firing switch PB is again Action, could start controlled cell circuit.

It is compared with prior art, the present invention simply electric by compositions such as firing switch, emergency stop switch and relays Air circuit, recovers after main power source dead electricity, or after emergent stopping and when resetting, controlled cell circuit will not start automatically, it is necessary to Controlled cell circuit normal starting can just be made according to certain operation order, the power-off protection of controlled cell can be easily achieved Function, while the normal function of firing switch will not be influenced.

Brief description of the drawings

Fig. 1 is the electrical structure diagram of the present invention.

Fig. 2 is the schematic diagram of sequential firing of the present invention.

Embodiment

As shown in Figure 1 and Figure 2, the present invention is made of power supply circuit 1, sequential firing circuit 2, controlled cell circuit 3, Power supply circuit 1 is the part that electric energy is provided to controlled cell circuit 3 and sequential firing circuit 2, and controlled cell circuit 3 is to connect Receive the electric energy of the output of sequential firing circuit 2, the part for starting controlled cell, power supply circuit 1, sequential firing circuit 2, by Control element loop 3 is serially connected.

The firing switch PB in sequential firing circuit 2 is made of normally opened contact 6 and normally-closed contact 9；Relay R1 is by relay R1 coils 8 are formed with relay R1 normally opened contacts 1, relay R1 normally opened contacts 2 14；Relay R2 is by relay R2 coils 12nd, relay R2 normally opened contacts 1, relay R2 normally opened contacts 2 10 form；The main power source 4 and relay of power supply circuit 1 The load 5 of device R1 normally opened contacts 1, relay R1 normally opened contacts 2 14, controlled cell circuit 3 is serially connected；Firing switch PB normally opened contacts 6, relay R2 normally opened contacts 1, relay R1 coils 8 are connected, firing switch PB normally opened contacts 6 and relay Both ends of the other end of R1 coils 8 respectively with main power source 4 are connected；Firing switch PB normally-closed contacts 9, emergency stop switch EMG are normal Closed contact 11, relay R2 coils 12 are connected, and relay R2 normally opened contacts 2 10 are simultaneously connected in the two of firing switch PB normally-closed contacts 9 Both ends of the other end of end, firing switch PB normally-closed contacts 9 and relay R2 coils 12 respectively with main power source 4 are connected.

Power supply circuit 1 is by taking DC power supply 4 as an example below, and controlled cell circuit 3 is by taking light bulb 5 as an example, to illustrate this hair Bright each function.

1. normal starting function：4 normal power supply of main power source, emergency stop switch EMG are in the state resetted, promptly stop EMG normally-closed contacts 11 are only switched to close；Firing switch PB is closed, its normally opened contact 6 disconnects, and normally-closed contact 9 closes； Relay R2 is obtained electric at this time, and relay R2 normally opened contacts 1, relay R2 normally opened contacts 2 10 close, when pressing firing switch After PB, its normally opened contact 6 closes, and normally-closed contact 9 disconnects；Relay R1 coils 8 it is electric, relay R1 normally opened contacts 1, after Electric appliance R1 normally opened contacts 2 14 close, and controlled cell circuit 3 obtains electric, light bulb（Load 5）Light.

2. normal switch holding function：After the completion of starting, light bulb（Load 5）Light.When firing switch PB is closed, its Normally opened contact 6 disconnects, and normally-closed contact 9 closes, then relay R1 coils 8 power off, relay R1 normally opened contacts 1, relay R1 Normally opened contact 2 14 disconnects, and controlled cell circuit 3 powers off, light bulb（Load 5）Extinguish；It is normally opened to touch if pressing firing switch PB The closure of point 6, normally-closed contact 9 disconnect, and relay R1 coils 8 obtain electric, relay R1 normally opened contacts 1, relay R1 normally opened contacts 2 14 closures, controlled cell circuit 3 obtain electric, light bulb（Load 5）Light.In this case, the state that controlled cell circuit 3 works Controlled by firing switch PB.

3. power-off protection function：After the completion of starting, light bulb（Load 5）Light.When 4 dead electricity of main power source (abnormal to occur) When, then relay R1 coils 8 and relay R2 coils 12 power off at the same time, and relay R1 normally opened contacts 1, relay R1 are normally opened Contact 2 14 disconnects, and relay R2 normally opened contacts 1, relay R2 normally opened contacts 2 10 disconnect, and controlled cell circuit 3 powers off, Light bulb（Load 5）Extinguish.If main power source 4 recovers, its normally opened contact 6 closes, often due to firing switch PB in an ON state Closed contact 9 disconnects, and emergency stop switch EMG is in the state resetted, and emergency stop switch normally-closed contact 11 closes, relay R2 coils 12 will not obtain electric, relay R2 normally opened contacts 1, the disconnection of relay R2 normally opened contacts 2 10, then relay R1 coils 8 Electric, relay R1 normally opened contacts 1, the disconnection of relay R1 normally opened contacts 2 14 will not be obtained.In this way, opened even if starting at present Close PB in an ON state, controlled cell circuit 3 will not obtain electric, light bulb because of the recovery of main power source 4（Load 5）Extinguish.

4. sequential firing function：After the completion of starting, light bulb（Load 5）Light.When emergency stop switch EMG be pressed it is (different Often occur), emergency stop switch EMG normally-closed contacts 11 disconnect, then relay R2 coils 12 power off, relay R2 normally opened contacts one 7th, relay R2 normally opened contacts 2 10 disconnect, so that relay R1 coils 8 power off, relay R1 normally opened contacts 1, relay Device R1 normally opened contacts 2 14 disconnect, and controlled cell circuit 3 also powers off, light bulb（Load 5）Extinguish.If emergent stopping is resetted at this time EMG is switched, emergency stop switch EMG normally-closed contacts 11 close, due to firing switch PB in an ON state, its normally opened contact 6 Closure, normally-closed contact 9 disconnect, and relay R2 coils 12 power off, relay R2 normally opened contacts 1, relay R2 normally opened contacts two 10 disconnect, so relay R1 coils 8 will not obtain electric, relay R1 normally opened contacts 1, relay R1 normally opened contacts 2 14 Disconnect.In this way, even if firing switch PB is in logical state at present, controlled cell circuit 3 will not be because of emergency stop switch The reset of EMG and electric, light bulb（Load 5）Extinguish.

Above 3., 4. two kinds of situations, if necessary to normal starting, just must can just make by 1. fixed sequence of movement controlled Element loop 3 is connected, and after reaching and be abnormal, protects the not self-running purpose in controlled cell circuit 3.

Claims

A kind of 1. sequential firing circuit, it is characterised in that：Power supply circuit (1), sequential firing circuit (2), controlled cell return Road (3) is serially connected；The firing switch PB of the sequential firing circuit (2) is by normally opened contact (6) and normally-closed contact (9) group Into；Relay R1 is by relay R1 coils (8) and relay R1 normally opened contacts one (13), two (14) group of relay R1 normally opened contacts Into；Relay R2 is by relay R2 coils (12), relay R2 normally opened contacts one (7), two (10) group of relay R2 normally opened contacts Into；The main power source (4) of power supply circuit (1) and relay R1 normally opened contacts one (13), relay R1 normally opened contacts two (14), The load (5) in controlled cell circuit (3) is serially connected；Firing switch PB normally opened contacts (6), relay R2 normally opened contacts one (7), relay R1 coils (8) are connected, the other end of firing switch PB normally opened contacts (6) and relay R1 coils (8) respectively with The both ends connection of main power source (4)；Firing switch PB normally-closed contacts (9), emergency stop switch EMG normally-closed contacts (11), relay R2 coils (12) are connected, relay R2 normally opened contacts two (10) and the both ends for being connected in firing switch PB normally-closed contacts (9), starting are opened Both ends of the other end of PB normally-closed contacts (9) and relay R2 coils (12) respectively with main power source (4) are closed to be connected；In main power source (4) when normal power supply and emergency stop switch EMG reset, press firing switch PB, controlled cell circuit (3) it is electric, close Dynamic switch PB, controlled cell circuit (3) power-off；Restore electricity after main power source (4) dead electricity, or emergency stop switch EMG actions When resetting afterwards again, controlled cell circuit (3) will not therewith it is electric, firing switch PB is acted again, could start controlled cell time Road (3).