CN2171940Y

CN2171940Y - Overvoltage prolection improved device for protector

Info

Publication number: CN2171940Y
Application number: CN 93226138
Authority: CN
Inventors: 徐梁; 于军
Original assignee: YULI TELECOMMUNICATIONS CO Ltd SHANGHAI
Current assignee: YULI TELECOMMUNICATIONS CO Ltd SHANGHAI
Priority date: 1993-08-07
Filing date: 1993-08-07
Publication date: 1994-07-13
Anticipated expiration: 2003-08-07

Abstract

The utility model relates to an over-voltage protection improved device for protectors, which is composed of a linking assembling body and a discharge return circuit, wherein, the linking assembling body is composed of a warning post (1), a slow fuse (2), and a warning switch (3); the discharge return circuit is composed of the slow fuse (2) and a solid discharge tube (4). Because the solid discharge tube (4) is used as a main element of the high voltage discharge in the utility model, the utility model overcomes the defect of the prior art that when a gas discharge tube is used, the unsafe factors caused by that the circuit is opened and loses the effect.

Description

Overvoltage prolection improved device for protector

The utility model relates to a kind of improvement of communication apparatus parts, specifically, is the improvement of protector parts.

As everyone knows, the elementary protection of communication system main frame is most important, and the main effect of its employed elementary protector is: anti-lightning strike, anti-forceful electric power induction and power line touched protect.For this reason, comprise overvoltage protection parts and overcurrent protection guard member in the elementary protector.The high pressure that thunderbolt and forceful electric power induction is caused by the overvoltage protection parts discharges over the ground; By the overcurrent protection parts the big electric current because of touching of power line caused is cut off, thereby, the safe handling of protection communication apparatus and staff's safety operation.But for a long time, elementary overvoltage protection is to use gas discharge tube as the anti-surge protection component always, and elementary overcurrent protection then is with quick fuse or PTC thermistor or high molecular polymer temperature-sensitive device.At present, the protector of use all is to adopt these two kinds of protected modes, and its principle is for shown in Figure 1 as described later.Be characterized in: when voltage surpasses the 230+30 volt, the gas discharge tube conducting, high-tension electricity is released into ground, and borrow heat that the gas discharge tube discharge process produces with eutectic block tin (or heating coil) fusing and cause alarming mark post, send alarm number and make discharge tube two terminal shortcircuits protect equipment.The shortcoming that exists is: the gas discharge tube decline is fast, low-response, discharge voltage shakiness, and particularly " open failure " can cause illusion, so that in case suffers thunderbolt to damage telephone exchange's equipment because of not discharging.

The purpose of this utility model provides a kind of reliable over-pressure safety device that is used for protector.

Technical solution of the present utility model is as follows:

1. solve the deadly defect of gas discharge tube " open failure ", this is the key that improves the reliability of overvoltage protection, and the flash-over characteristic of solid discharging tube is very good, and there is not the shortcoming of " open failure " in it, therefore, the utility model replaces traditional gas discharge tube with solid discharging tube; 2. adopting at a slow speed, fuse replaces the eutectic block tin, because solid discharging tube does not generate heat in discharge process (exactly, the heat that produces is very little, be not enough to the fusing of eutectic block tin), therefore, in the technical program, adopting at a slow speed, fuse seals in the solid discharge loop, rather than as prior art, the eutectic block tin is cladded on the housing of gas discharge tube, in case be struck by lightning or the high pressure that high voltage induction produced when standing the discharge loop discharge that solid discharging tube and fuse at a slow speed form, discharging current is flowed through at a slow speed, and fuse makes its heating fusing (being generally about 2 minutes), thereby, make by fuse at a slow speed, the alarm interlock combination action that alarm mark post and alarm switch constitute cuts off by user side entering the path of telephone exchange's end and causing mark post alarm indication, and connection alarm signal line produces alarm signal.As mentioned above, the utility model comprises by the alarm mark post, the linkage groups that constitutes of fuse and alarm switch is fit and by this discharge loop of constituting of fuse and solid discharging tube at a slow speed at a slow speed.Wherein: fuse connects into telephone exchange's inlet wire from user side at a slow speed, connects solid discharging tube to earth terminal after again and constitutes the loop; Fuse is fixed on the alarm switch at a slow speed, forces this alarm switch to be in off state; Fuse supporting alarm mark post makes to be in non-alarm indicating status, i.e. normality at a slow speed.

The utility model has the advantages that: 1. structure is simple and clear, and is easy to implement; 2. reliable operation is guaranteed safety; 3. long service life, after the overvoltage protection action, fuse still can continue to use as long as change at a slow speed.

The utility model is implemented by the following drawings, and accompanying drawing is summarized as follows:

Fig. 1 is the structural representation of existing over-voltage and over-current protector.

Fig. 2 is circuit theory diagrams of the present utility model.

Fig. 3 is an example structure schematic diagram of the present utility model.

Fig. 4 is the three-dimensional decomposition texture schematic diagram of alarm interlock combining structure of the present utility model.

Below we provide better embodiment of the utility model according to Fig. 2-Fig. 4, and cooperate description to this embodiment, ins and outs of the present utility model further are provided.

See also Fig. 2, over-pressure safety device of the present utility model, its be by the alarm mark post 1, fuse 2, alarm switch 3 and solid discharging tube 4 constitute at a slow speed.Wherein, by alarm mark post 1, fuse 2 and alarm switch 3 constitute alarm linkage groups zoarium at a slow speed, they have the interlock action, as Fig. 3, shown in Figure 4, fuse 2 is fixed on the alarm switch 3 at a slow speed, make this switch 3 be in open-circuit condition, and this fuse 2 is as the support of alarm mark post 1, make this alarm mark post 1 be in the normal state (non-alarm status), and in case at a slow speed fuse 2 fused, then alarm switch 3 is borrowed the effect of self to get back to closure state because of discharging, i.e. alarm status, closed alarm loop, send alarm signal, meanwhile, the supporting of fuse 2 descends alarm mark post 1 because of losing at a slow speed, makes to be in the alarm indicating status---express by the alarm sign circle 11 on it.We also can see from Fig. 2, and fuse 2 is concatenated into discharge loop with solid discharging tube 4 at a slow speed, this at a slow speed fuse 2 be connected on the user line 5 of user side, discharge tube 4 cross-over connections that consolidate that connect are thereafter talked about between 6 in user line 5 and ground.Therefore, in case be struck by lightning or the high-voltage signal (〉=200 volts) that produces of induction by force, just go into ground through this fuse 2 and solid discharging tube 4 discharges, make high-voltage signal can not enter telephone exchange, and in the process of electrion, fuse 2 is fused because of flowing through electric current at a slow speed, general about two minutes.

See also Fig. 3, as shown in the figure, the utility model and overcurrent security personnel parts 8 are in series and have constituted employed elementary protector on telephone exchange's main frame.As shown in the figure, alarm switch 3 connects ground wire and alarm signal line 7, it is to be made up of two

reeds

31,32, be subjected to forcing two reeds, 31,32 closures that are connected on as the time spent on the alarm signal line being provided with, and be subjected to forcing do the time spent they separately, promptly fuse 2 is fixed on its a slice reed 31 and the hook guard 20 at a slow speed, thereby forces alarm switch 3 to disconnect.As shown in the figure, the parts 8 of ensuring public security in addition, its mount pad 80; Protector shell 9, outer shell base 90 and circuit board 91.

Referring to Fig. 4, as shown in the figure, the pars intermedia of alarm mark post 1 has ring washer 13, upper end to have alarm sign 11, lower end that location notch 14 is arranged, and is inserted in back-moving spring 12 from the upper end, afterwards, is inserted in alarm bar shelf 10 again.During installation, fuse 2 one ends are fixed on the hook guard 20 at a slow speed, and the other end is fixed on the reed 31 of alarm switch 3, two reeds that make it to constitute alarm switch 3 were opened in 31,32 minutes, at last, the location notch 14 of alarm mark post 1 is put on fuse 2 at a slow speed, 21 among the figure is the fuse base.

Claims

1, a kind of protector overvoltage protection modifying device, comprise alarm mark post (1), the alarm switch (3) of ground wire (6) and alarm signal line (7) in succession, it is characterized in that also having fuse (2) and solid discharging tube (4) at a slow speed, this alarm mark post (1) is positioned at a slow speed and becomes contact and connection on the fuse (2), and this fuse (2) and alarm switch (3) Joint at a slow speed, the three constitutes an alarm interlock combining structure; Fuse (2) and solid discharging tube (4) are coupled to discharge loop with circuit at a slow speed for these.

2, according to the described device of claim 1, it is characterized in that alarm interlock combining structure be with fuse (2) at a slow speed be fixed on force on the alarm switch (3) this switch (3) be in off-state and this at a slow speed fuse (2) supporting alarm mark post (1) this alarm mark post is in the normal state, and when this when fuse (2) disconnects at a slow speed, the closed and alarm mark post of alarm switch (3) falls the indication alarm.

3, according to the described device of claim 2, it is characterized in that alarm switch (3) is made of reed (31) and (32), one reed (31) and the installation mounting (20) of fuse (2) at a slow speed constitute two stiff ends of this fuse (2).

4, according to the described device of claim 2, the lower end that it is characterized in that alarming mark post (1) has can be inserted in the location notch (14) of fuse (2) at a slow speed.