CN2073619U

CN2073619U - Automatic changer of lightning arrester's fusing fuse

Info

Publication number: CN2073619U
Application number: CN 89207591
Authority: CN
Inventors: 陈达银
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-05-16
Filing date: 1989-05-16
Publication date: 1991-03-20

Abstract

The utility model provides an automatic changer for the fuse of a lightning arresters, and the utility model is characterized in that the fuse is provided with a controlling connection point and the controlling connection point of a main fuse is connected in series with a relay. The reed switch of the relay is connected in series with a spare fuse and is connected in parallel with the main fuse, so when the main fuse is burnt out, the controlling connection point of the main fuse can be caused to close and the relay is caused to be electrified with a corresponding reed closed, prompting the spare fuse to be connected into a circuitry and maintaining the circuitry clear. At the same time, a light indicator signal is sent out for informing the position where the fuse is damaged and control voltage is conveyed to a switch integrated block in an internal alarming and generating circuit for starting up an alarm circuit to send out sound and light signals.

Description

Automatic changer of lightning arrester's fusing fuse

The utility model relates to the lightning arrester in the open wire communication line terminal equipment.

At present, the lightning arrester in the open wire communication circuit mainly is installed on the terminal pole of outskirts of a town open-wire line and cable junction, and it mainly is made up of fuse RD, vacuum arrester BL etc.After circuit is struck by lightning or makes on the circuit voltage or electric current surpass certain limit owing to other reason, vacuum arrester BL action, even fuse RD action, line disconnection, thus can prevent that terminal equipment is impaired, in case but the fuse action, circuit is cut off, will cause following problem:

1, line interruption, communication is also just interrupted;

2, make this phenomenon of line interruption and circuit broken string phenomenon similar after the fuse blows, can't judge abort situation, fault type, influence communication recovery work.

The lightning-arrest fusing auto switching device that the utility model proposes designs for solving above-mentioned two problems, after it can make main fuse be fused automatically with in the spare fuse access communications circuit, thereby make telecommunication circuit keep working incessantly; It has also sent out alarm signal simultaneously, informs that maintenance personal's main fuse is bad, thereby the maintenance personal can be overhauled rapidly, fixes a breakdown.

Fig. 1 is that lightning-arrest fuse and three encloses the figure that connects of (drainage coil B1, plug flow coil B2, matched coil B3) in the lightning-arrest fuse auto switching device that proposes of the utility model; Fig. 2 is lightning-arrest fuse and the figure that connects of repeating coil B4; Fig. 3 is control automatic switching device and alarm signal generating means circuit theory diagrams in the lightning-arrest fuse auto switching device that the utility model proposes; Fig. 4 be the lightning-arrest fuse auto switching device that the utility model proposes in line system with other each several part connection box schematic diagram, wherein A is outside line, B is a terminal equipment, C is an entrance cable, D is the carrier room receiving equipment; BQ is a lightning arrester, and RDJ is above-mentioned control auto switching fuse apparatus, and ICJ is above-mentioned alarm signal generating means.Fig. 4 a is the block diagrams of two pairs of lines when being carrier line, and Fig. 4 b is the block diagram of a pair of carrier wire when adding a pair of attention line.Each accompanying drawing of contrast is described in detail the formation and the operation principle of auto switching device below.

The lightning-arrest fusing automatic pouring parallel operation that the utility model proposes is characterized in that:

1, fuse has control contact (as select model for use be the fuse of FAX206-3A);

2, the control contact Rdi of main fuse RD be connected across between the power supply V after relay J i connects;

3, in parallel with fuse RDj again after the reed switch K of spare fuse RDj and the relay J i series connection.

As Fig. 1--shown in Figure 3, if after any among the RD1--RD4 or the several fusing, its one or several connection of corresponding control contact Rd1--Rd4, such as the situation of only considering after RD1 fuses (other situation all fours), this moment, RD1 connected, thereby direct voltage acts on the relay J1.(Fig. 3), the reed switch K1-2 of this relay connects (as shown in Figure 1 and Figure 2), thereby with spare fuse RD5 access communications circuit, keeps the unimpeded of circuit.

Thereby for the reed switch K disconnection that prevents to make the Ji dead electricity cause Ji when bad master is melted device RDi changing, communication disruption, in parallel we can connect another reed switch K of Ji with K switch i after with Rdi, the connection that can keep Ji like this.If after having changed bad RDi, only need instantaneously open that normally closed push button switch Ki just can make the Ji dead electricity, K disconnection, main fuse lambda line work again.

Observe for the ease of the maintenance personal, change bad main fuse, we can be in parallel with relay J i with light-emitting diode ZDi with the resistance R i of series connection, in case RDi fusing like this, the Rdi closure, ZDi is luminous.

After main fuse is burnt out, if spare fuse is line attachment immediately, might be burnt out simultaneously, for fear of the generation of this situation, electric capacity in parallel at relay J i two ends is worked as certain main fuse like this and is burnt, the control contact is connected, because the effect of this shunt capacitance, relay postpone to restart after a period of time, thereby can avoid spare fuse to be burnt out simultaneously.

Therefore, we can solve fuse in the past and burnt out the problem that back communication can be interrupted, below we to narrate this auto switching device be how to send alarm signal.

As shown in Figure 3, the lightning-arrest fuse auto switching device that the utility model proposes also comprises an alarm signal generating means, its inner potentiometer W2 be connected across on the power supply V after Rdi connects; The swing arm of W2 and switch integrated circuit IC(such as TWH8778) control end (IC of above-mentioned model is 5 pin) link to each other, the two ends of IC respectively with resistance R 10 link to each other with relay J E the back cross-over connection cover V two ends, source; The reed switch K1-2 of JE be connected across power supply V two ends after resistance R 11, light-emitting diode ZD9 connect; 5 ends of another dibit reed switch K4-5-6 of JE be access to power supply one end after electric bell L links to each other, 4,5,6 ends link to each other with a, the b end of one pole on-off switch K5 respectively, 0 end of K5 links to each other with the other end of power supply.

After main fuse RDi is burnt, control corresponding contact Rdi closure, the last generation of W2 voltage, the control end of IC obtains starting resistor, IC two switch terminals conductings, the JE work of switching on, 4,5 of this relay spring K switch 1-2, K4-5-6 connects, ZD9 is luminous, electric bell L sounding, and both value of informing crewmans have fuse to be burnt out.This duration crewman can throw K5 the end in b, and electric bell L stops alarm (it is luminous that ZD9 keeps).After having changed bad main fuse RDi, the last no-voltage of W2, the IC dead electricity makes the JE dead electricity, thus ZD9 extinguishes, and the reed switch contact 5 of JE links to each other with 6, and electric bell is sounding again, informs that circuit has recovered normally, needs only this moment K5 thrown once more in a to hold.

Under certain opposite extreme situations, spare fuse may also be burnt out before main fuse burns out renewal, just is necessary to notify rapidly this moment to go before the maintenance personal to change, for this reason, as shown in Figure 3, we equally also can send warning message after can making in the spare fuse arbitrary or many to burn out.In the drawings, control contact Rdi one end of spare fuse RDi links to each other with the end of power supply V, and the other end links to each other with the Rj, the ZDj that go here and there mutually with Dj simultaneously, and the other end of ZDj links to each other with the other end of power supply; Dj connects toward aforesaid potentiometer W2.Burnt as if certain or several spare fuse of going up like this, the control corresponding contact will be closed, and the luminous tube ZDj on this road will be luminous, also has voltage to produce simultaneously on the W2, thereby generation IC conducting causes that finally ZD9 is luminous, the L sounding.

In order to prevent that power supply from breaking down, thereby make the equipment ability of losing the job, can part take place in auto switching part and alarm signal and install R12, ZD10 and R17, the ZD11 that is connected across both ends of power and goes here and there mutually respectively additional, in case ZD10 or/and ZD11 is not luminous, just represents that power supply has fault.

According to Fig. 1--circuit diagram shown in Figure 3, with various elements or be welded on the printed circuit board (PCB), or be connected on (as RDi etc.) in the circuit, wherein can control auto switching fuse part RDJ(as shown in Figure 4) circuit be installed in the caisson of being convenient to open, this part equipment is installed on the terminal pole, the part ICJ that can send above-mentioned alarm signal then is installed in the carrier wave machine room, and its each indicator light should be exposed at outside the shell.

The equipment that the utility model proposes can be connected on a pair of or the two pairs of order wires on (just the same) for how right line principle.When two pairs of lines are carrier wire, can adopt the connection shown in Fig. 4 a.The 24V power line that carrier room is sent and the control line of aforementioned backhaul signals can adopt the surplus line (also can otherwise present certainly) in the entrance cable.If it is carrier wire that order wire has a pair of, and another then can utilize attention line or voice-frequency telephony line that repeating coil is installed and extract phantom lines when being attention line or voice-frequency telephony line, constitutes the loop with the earth, make the alarm signal control line with a surplus line of cable or other line in addition, shown in Fig. 4 b.

As an embodiment, as Fig. 1--shown in 3, the model of each element among the figure, parameter are as follows:

R1--R8 resistance R TX-0.125W-1.5W Europe

R9 resistance R TX-0.125W-600 Europe

R10 resistance R TX-1W-100 Europe

R11--R13 resistance R TX-0.125W-3K Europe

W1 variable resistor-1W-1K Europe that winds the line

W2 solid potentiometer WS-1-0.5W-560 Europe

C1 capacitor C D11-25V-100uf

C2--C5 capacitor C D11-25V--220uf

D1--D13 diode 2CP12

D14 voltage-stabiliser tube 2CW14

ZD1--ZD11 luminous tube BT502

IC switch integrated circuit TWH8778

RD1--RD8 fuse FAX206-3A

RD9 fuse FAX206-2A

The K1--K4 push-button switch

K5 toggle switch KNX2 * 2

J1--J4, JE relay J RXB-1-500 Europe

L 24V dc bell

The BL vacuum arrester

As mentioned above, the lightning protection fuse automatic pouring parallel operation that the utility model proposes compared with prior art has the following advantages at least:

1, after main fuse is fused, spare fuse is line attachment automatically, keeps the unimpeded of communication line.

2, after arbitrary or a plurality of main fuse or spare fuse are fused, can both give acoustic signal of machine room and optical signal, minder person need not test and just know have fuse to burn out on the terminal pole, thereby go to repair before can directly notifying the maintenance personal, so not only save value crewman's testing time, also saved lineman's the line inspection time.

3, after arbitrary fuse blows, can both provide an optical signal (ZD1--ZD8 is corresponding luminous), the position that makes the lineman can distinguish bad fuse immediately need not test.

4, after the lineman had changed the fuse that damages, the machine room electric bell is sounding once more, and luminous tube then extinguishes, and the expression circuit has recovered normally, like this with regard to dispense with telephone contact, notice.

Claims

1, a kind of lightning-arrest fuse auto switching device is characterized in that:

1.1 fuse has the control contact;

1.2 the control contact Rdi of main fuse RDi be connected between the power supply V after relay J i connects;

1.3 it is in parallel with main fuse RDi again after the reed switch K1-2 of spare fuse RDj and the relay J i series connection.

2, lightning-arrest according to claim 1 fuse auto switching device is characterized in that:

It also comprises alarm signal generation part, its inner potentiometer W2 be connected across between the power supply V after the control contact Rdi of aforementioned main fuse RDi connects; The W2 swing arm links to each other with the control end of switch ic chip; Two switch terminals of IC link to each other with relay J E with resistance R 10 respectively and afterwards lead to the two ends of power supply V; The reed switch K1-2 of JE is connected across both ends of power with resistance R 11, light-emitting diode ZD9 after connecting; 5 ends of another dibit reed switch K4-5-6 of JE be access to power supply one end after electric bell L links to each other, 4,6 ends link to each other with a, the b end of one pole on-off switch K5 respectively, 0 end of K5 links to each other with the other end of power supply.

3, as lightning-arrest fuse auto switching device as described in the claim 2, it is characterized in that: the end of the control contact Rdj of spare fuse RDj links to each other with the end of power supply V, and the other end links to each other with the resistance R j that is connecting, light-emitting diode ZDj with diode Dj simultaneously; Diode Dj connects toward aforementioned potentiometer W2; The other end of ZDj connects the other end toward power supply V.

4, as lightning-arrest fuse auto switching device as described in claim 1 or 2 or 3, it is characterized in that: also there are the resistance R i and the light-emitting diode ZDi of string mutually in the two ends of aforementioned relay J i, and this relay J i two ends also and an electric capacity arranged.

5, as lightning-arrest fuse auto switching device as described in claim 1 or 2 or 3, it is characterized in that: connect with the K switch i control contact Rdi of back and aforementioned main fuse RDi of another reed switch K3-4 of aforementioned relay J i is in parallel.

6, as lightning-arrest fuse auto switching device as described in the claim 4, it is characterized in that: connect with the K switch i control contact Rdi of back and aforementioned main fuse RDi of another reed switch K3-4 of aforementioned relay J i is in parallel.