CN2289297Y - Relay - Google Patents

Abstract

The utility model relates to a novel relay, a DC relay belonging to the field of power generation, power supply and power distribution, and the utility model is the improvement of a pulse relay and a signal relay. The utility model comprises a sampling circuit, a control circuit, an indicating switching circuit and an executive circuit. The utility model is characterized in that a limiting value filter circuit is arranged between the sampling circuit and control circuit, and the control circuit and the indicating circuit in the existing polarity formula relay are improved. The utility model has the advantages of simple circuit, reliable performance and low cost.

Description

New type of relay

The utility model is a kind of relay, it relate to a kind of to existing send out, for the improvement of the relay technology in, distribution field, specially refer to a kind of to send out, for the direct current relay in, distribution field: the improvement of time pulse relay, signal relay.

In the prior art, relay can be divided into two big classes: a class is mechanical electromagnetic relay, and a class is the electronic type relay.The mechanical type electromagnetic relay uses the age more permanent, and China's electric power system is owing to reasons such as history at present, and still in a large amount of uses, this relay need consume a large amount of ferrous metal and non-ferrous metal, and poor reliability.The electronic type relay is also not long service time in China.From circuit structure, it comprises several basic circuits such as sample circuit, control circuit, indication change-over circuit and executive circuit.From actual operating position, there is following shortcoming in it: 1. poor reliability because sample circuit adopts photoelectricity every closing device more, when sampling current hour, less by the electric current of photoelectrical coupler, sensitivity is low, is difficult to make relay work; When sampling current was big, the electric current that flows through photoelectrical coupler was also very big, and circuit devcie is damaged.2. cost is higher: because control circuit adopts integrated device, for improving its reliability of applying on high voltage circuit, need take safeguard measure more on the one hand, increase a lot of devices, improve cost like this, and reliability still can not get guaranteeing.On the other hand, taken the contact of carrying out in the relay in the indication change-over circuit, made this contact can not bring into play its due effect.Need more for a long time when controlling contact especially, certainly will increase the number of carrying out relay.

The purpose of this utility model just is to overcome the shortcoming of prior art, and a kind of new type of relay of high reliability is provided.

The purpose of this utility model is achieved like this: it comprises sample circuit, control circuit, indication change-over circuit, executive circuit, it is characterized in that: be provided with between sample circuit and control circuit and comprise diode D ₇～D ₁₁And capacitor C ₄The limit value filter circuit that constitutes.Diode D wherein ₈～D ₁₀Series connection, its negative terminal and diode D ₁₁Positive pole and capacitor C ₄An end ground connection, its anode and diode D ₁₁Negative pole, capacitor C ₄The other end and diode D ₇Positive pole be connected into common point and link to each other, and diode D with the output point of sample circuit ₇Negative pole link to each other with the input point of control circuit.

Above-mentioned new type of relay also has following feature:

(1) control circuit comprises triode T ₁, T ₂And collector resistance R ₄, R ₅With voltage-stabiliser tube DW ₁, T wherein ₂Base stage and D ₇Negative pole link to each other grounded emitter, collector electrode and T ₁Base stage and R ₅Link to each other; T ₁Grounded emitter, the integrated utmost point and voltage-stabiliser tube DW ₁Negative pole and R ₄Link to each other; DW ₁Positive pole with the indication change-over circuit link to each other.

(2) the indication change-over circuit comprises light-emitting diode DEL ₁, DEL ₂, resistance R ₃And controllable silicon SK, wherein DEL ₂Positive pole and R ₃End series connection; DEL ₁Negative pole connect with the anode of SK; DEL ₂Minus earth, the minus earth of SK; R ₃The other end, DEL ₁Positive pole link to each other with executive circuit; The trigger electrode of SK links to each other with the output point of control circuit.

(3) indication is provided with in the change-over circuit and comprises diode D ₃～D ₅The bypass protection circuit of series connection, it is connected in parallel on DEL in the same polarity mode ₁Two ends.

Owing to be provided with the limit value filter circuit in the utility model; therefore can prevent the misoperation that reverse induction caused when the strong signal of light current disturbed with big electric current temporary impact and current vanishes effectively; improved reliability greatly; simultaneously; because the control circuit discrete component need not other protective circuits and indicates change-over circuit to change into by light-emitting diode and controllable silicon to constitute, and has saved the contact of carrying out relay; thereby reduced cost, and further improved reliability.Advantages such as therefore it has that circuit is simple, dependable performance, cost are lower.

Further set forth concrete enforcement of the present utility model below in conjunction with accompanying drawing.

Fig. 1 is a kind of circuit structure block diagram representation of the present utility model.

Fig. 2 is a kind of shell mechanism schematic diagram of the utility model.

Fig. 3 is a kind of electrical block diagram of the present utility model.

See also Fig. 1, can find out from the utility model circuit structure block diagram: it comprises parts such as sample circuit 1, limit value filter circuit 2, control circuit 3, indication change-over circuit 4, executive circuit 5.Fig. 2 is its a kind of shell schematic diagram.Fig. 3 is a kind of electrical block diagram, therefrom is not difficult to find out:

(1) sample circuit 1 comprises: direct current sensor transformer B, capacitor C ₅, diode D ₁₂, D ₁₃, C wherein ₅Prevent the interference of electromagnetic field, D to B ₁₂To the former margin width of cloth of B.D ₁₃Isolate external power.

(2) limit value filter circuit 2 comprises: diode D ₇～D ₁₁, capacitor C ₄D wherein ₈～D ₁₀Series connection, its negative terminal and D ₁₁Positive pole and C ₄An end ground connection, its anode and D ₁₁Negative pole, C ₄The other end and D ₇The positive pole limit of paying that is connected into common point and transformer B link to each other; D ₇Negative pole and T ₂Base stage link to each other.Increase limits as need, two utmost points of connecting can be by the D shown in the figure ₈～D ₁₀Three, three of corresponding increases add.

(3) control circuit 3 comprises: triode T ₁, T ₂And collector resistance D ₄, R ₅Voltage-stabiliser tube DW ₁, wherein: T ₂Base stage and D ₇Negative pole link to each other grounded emitter, collector electrode and T ₁Base stage and R ₅Link to each other; T ₁Grounded emitter, collector electrode and voltage-stabiliser tube DW ₁Negative pole and R ₄Link to each other; DW ₁Positive pole link to each other with the trigger electrode of controllable silicon SK.If SK is bidirectional triode thyristor, then at it and DW ₁Between serial connection diode D ₆(as shown in Figure 3).T as can be seen from Figure 3 ₁, T ₂Be a kind of switching circuit.T ₁Be in open, T ₂Be in cut-off state.

(4) indication change-over circuit 4 comprises: light-emitting diode DEL ₁, DEL ₂, resistance R ₃And controllable silicon SK; DEL wherein ₂Positive pole and R ₃End series connection, DEL ₁Negative pole connect with the anode of SK; DEL ₂Negative pole and the minus earth of SK, the trigger electrode of SK and DW ₁Positive pole or D ₆Negative pole (as shown in Figure 3) link to each other; R ₃The other end, DEL ₁Positive pole and executive circuit in the output of execution relay ZJ link to each other; In order further to improve the reliability of circuit, can be at DEL ₁Two ends bypass protection circuit in parallel, it can be by D ₃～D ₅Three diodes are in series (as shown in Figure 2), also can by two utmost points more than three be connected into and.Its both positive and negative polarity and difference DEL ₁Both positive and negative polarity link to each other.The main effect of bypass protection circuit: 1) be DEL ₁Two ends provide a burning voltage.2) work as DEL ₁In case when damaging, it is again an electric current admittance of carrying out relay ZJ.

(5) executive circuit 5 comprises: carry out relay ZJ, diode D ₂, D ₁, capacitor C ₁, resistance R ₁, R ₂Wherein, ZL starts main power source by C ₁Instantaneous charging provides.Keep power supply by R after the startup ₁Provide; R ₂Be C ₁Arresting element, D ₁Prevent C when being involution ₁Charge member, D ₂It is the loop of ZJ inverse electromotive force.

Need the relay of involution function, two kinds of involution circuit also are provided in Fig. 3; Hand resetting YT returns the J contact with replying by cable.The one end common ground of their involutions all is located at D ₁Positive pole, the other end is located at the negative pole of working power.

Also be provided with other anti-tampering element such as C among Fig. 3 ₂Anti-power supply disturbs C ₃The interference that causes when preventing involution.

The a kind of of several docking points among Fig. 3 with reference to connection is: (1), (2) are the current start loop; (3), (4) are the signal relay working power; (5), (7) start the loop for involution; (6), (8); (9), (10); (11), (12) are idle contact.

In order to save space, save sample circuit 1 and executive circuit 5, and the giving unnecessary details of the interconnected relationship of the miscellaneous part among Fig. 3.Figure be this concerning those skilled in the art, be not unfeasible with reference to Fig. 3.

The selecting for use with reference to as follows of some elements among Fig. 3: R ₁=12K Ω, R ₂=1 million Ω, R ₃, R ₄=36K Ω, R ₅=16K Ω; C ₁=0.22 μ f, C ₄=0.01 μ f, C ₅=0.22 μ f; D ₁-D ₁₃: 1N4006; ZJ:HG4180; J:JQX-14FC; T ₁, T ₂: C2U82; SK:TLL336A; YT: often open.

Simply narrate the utility model operation principle below again: power supply signal is through sensor transformer B, former limit by power surges B, secondary produces an induced voltage, because large and small the differing of former limit transient current, the induced voltage that secondary produces does not wait yet, but through the processing of amplitude limit filter circuit, the signal of sending into control circuit 3 is subjected to the effect of amplitude limit, and is not too large.If send into signal greater than T ₂Threshold voltage, T ₂By former by the upset be conducting, make T ₁Base stage instantaneously become low-voltage and end, its collector electrode place high potential forces DW ₁Conducting, for trigger current of trigger electrode of SR, SK becomes out state through triggering by former closed condition, makes DEL ₁With DEL ₂Change DEL ₂Former luminous indication is carried out (relay ZJ break supervision) and is converted to and do not indicate; DEL ₁Former not luminous (ZJ move indication) converts luminous indication to.

Claims (4)

1, a kind of new type of relay comprises sample circuit, control circuit, indication change-over circuit, executive circuit, it is characterized in that: be provided with between sample circuit and control circuit and contain diode D ₇～D ₁₁And capacitor C ₄The limit value filter circuit that constitutes, wherein diode D ₈～D ₁₀Series connection, its negative terminal and diode D ₁₁Positive pole and capacitor C ₄An end ground connection, its anode and diode D ₁₁Negative pole, capacitor C ₄The other end and diode D ₇Positive pole be connected into common point and link to each other, and diode D with the output point of sample circuit ₇Negative pole link to each other with the input point of control circuit.

2, relay as claimed in claim 1 is characterized in that: control circuit comprises triode T ₁, T ₂And collector resistance R ₄, R ₅With voltage-stabiliser tube DW ₁, T wherein ₂Base stage and D ₇Negative pole link to each other grounded emitter, collector electrode and T ₁Ground level and R ₅Link to each other; T ₁Grounded emitter, collector electrode and voltage-stabiliser tube DW ₁Negative pole and R ₄Link to each other; DW ₁Positive pole with the indication change-over circuit link to each other.

3, relay as claimed in claim 1 is characterized in that: the indication change-over circuit comprises light-emitting diode DEL ₁, DEL ₂, resistance R ₃And controllable silicon SK, wherein DEL ₂Positive pole and R ₃End series connection; DEL ₁Negative pole connect with the anode of SK; DEL ₂Negative pole, the minus earth of SK; R ₃The other end, DEL ₁Positive pole link to each other with executive circuit; The trigger electrode of SK links to each other with the output point of control circuit.

4, relay as claimed in claim 3 is characterized in that: indicate to be provided with in the change-over circuit to comprise diode D ₃～D ₅The bypass protection circuit of series connection, it is connected in parallel on DEL in the same polarity mode ₁Two ends.

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