CN214479605U

CN214479605U - Signal surge protector

Info

Publication number: CN214479605U
Application number: CN202120571250.6U
Authority: CN
Inventors: 周英; 黄玉珊; 康力; 杨国华
Original assignee: Sichuan Zhongguang Lightning Protection Technologies Co ltd
Current assignee: Sichuan Zhongguang Lightning Protection Technologies Co ltd
Priority date: 2021-03-19
Filing date: 2021-03-19
Publication date: 2021-10-22
Anticipated expiration: 2031-03-19

Abstract

The utility model discloses a signal surge protector, divide the disconnected subassembly including surge protection subassembly and inefficacy, the surge protection subassembly includes the voltage limiting type protection subassembly that comprises voltage limiting type component, voltage limiting type protection subassembly and the disconnected subassembly series connection of inefficacy divide between signal surge protector's electrode end, the disconnected subassembly of inefficacy divide to exceed for through-flow surge predetermine the fuse that the impulse value and break off. Signal surge protector's failure mode for the state of opening a way, the fuse wire can break off in the twinkling of an eye in order to form the state of opening a way when meeting with too big surge, can avoid voltage limiting type protection component to last to burn out through too big electric current, has higher reliability and security in signal line uses.

Description

Signal surge protector

Technical Field

The utility model relates to an electrical protection spare technical field especially relates to a signal surge protector.

Background

A surge protector is an electronic device for providing safety protection for various electronic equipment, instruments and meters and communication lines. The signal surge protector is a type of surge protector, and is generally applied to an industrial control system, a network audio communication system, a security monitoring system, a fire alarm system, an attendance system and the like. The existing surge protector usually adopts a temperature fuse or other temperature melting components to make the surge protector fail and then form an open circuit, usually, the element of the surge protector generates heat when encountering overlarge current or faults to cause overhigh temperature, and then the temperature fuse or the temperature melting components are disconnected by utilizing high temperature, so that the open circuit state is achieved. However, no power frequency current exists in the signal line, and the lightning current impact time is short, so that the instantaneous temperature of the signal surge protector is not high when the signal surge protector encounters surge, the signal surge protector is difficult to break off in time to form an open-circuit state, and the normal transmission protectiveness to signals is poor.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve and the technical task that provides improve prior art, provide a signal surge protector, solve signal surge protector in the prior art and be difficult to in time break off when meeting with lightning current and form the open circuit state, the lower problem of protection reliability to signal circuit.

For solving the above technical problem, the technical scheme of the utility model is that:

a signal surge protector comprises a surge protection assembly and a failure breaking assembly, wherein the surge protection assembly comprises a voltage limiting protection assembly formed by a voltage limiting element, the voltage limiting protection assembly and the failure breaking assembly are connected between electrode ends of the signal surge protector in series, and the failure breaking assembly is a fuse wire which is broken when the through-current surge exceeds a preset impact value. Signal surge protector adopt voltage limiting type protection subassembly and the disconnected subassembly of inefficacy to establish ties and constitute more reliable effectual protection, signal surge protector's failure mode is open circuit state, the fuse wire can break off in the twinkling of an eye and make the circuit break off and form open circuit state when meeting with too big surge, can be timely react to too big surge, improve anti-surge's ability, can avoid voltage limiting type protection subassembly to last to burn out through too big electric current, reduce and maintain the replacement cost. The fuse wire adopted by the utility model is different from the traditional temperature fuse wire which is simply fused through the heat effect, the temperature of the traditional temperature fuse wire can rise when the traditional temperature fuse wire passes through the overlarge current, the temperature fuse wire reaches the melting state after the traditional temperature fuse wire passes through the overlarge current for a certain time continuously, and then the traditional temperature fuse wire is disconnected, the traditional temperature fuse wire needs to pass through the overlarge current for a certain time, the response speed is slow, and the device of the load or the surge protector can be damaged in the period of passing the overlarge current continuously, but the fuse wire adopted by the signal surge protector of the utility model utilizes the mechanical effect and the heat effect generated by the surge of the fuse wire on the fuse wire to jointly act to disconnect the fuse wire, the response speed is fast, the fuse wire can be disconnected in the moment when the overlarge surge passes through, rather than utilizing the heat generated by the voltage limiting type protection component when the overlarge surge flows through, when the voltage-limiting protection assembly is subjected to overlarge surge, the temperature rise needs a process, the voltage-limiting protection assembly is burnt when the temperature of the voltage-limiting protection assembly does not reach the temperature for disconnecting the traditional failure breaking assembly, the failure mode of the signal surge protector cannot be guaranteed to be in an open circuit state, the protection performance is poor, and the maintenance and replacement cost is high.

Furthermore, the preset impact value of the fuse wire is less than or equal to the maximum through-current value of the voltage-limiting protection assembly, so that the voltage-limiting protection assembly is effectively protected, the voltage-limiting protection assembly is prevented from continuously passing through overlarge surge, the voltage-limiting protection assembly is prevented from being damaged, and the maintenance and replacement cost is reduced.

Furthermore, the fuse wire is linear or bent, the linear fuse wire is simple in structure and easy to process and assemble, the inductance of the curved fuse wire can be increased, the change rate of current waveform is reduced, and the accumulation time of current wave energy on the fuse wire is prolonged.

Furthermore, the diameter of the fuse wire is reduced along with the increase of the voltage grade of the voltage-limiting protection component, the maximum through-current capacity of the fuse wire is ensured to be smaller than or equal to that of the voltage-limiting protection component, and the fuse wire is further ensured to be firstly broken to form an open circuit state before the voltage-limiting protection component is not burnt.

Furthermore, the voltage limiting element comprises one or a combination of a transient diode and a piezoresistor, has simple structure, easy implementation and low cost, and can flexibly set the specific structure of the voltage limiting protection component according to the requirement.

Furthermore, when the voltage class of the transient diode adopted by the voltage limiting type protection component is 11-33V, the diameter of the fuse wire is 0.1-0.15 mm; when the voltage class of the transient diode adopted by the voltage limiting type protection component is 48-64V, the diameter of the fuse wire is 0.01-0.1 mm.

Furthermore, the disconnected subassembly of inefficacy still be provided with the status indication subassembly, the status indication subassembly include elastic component and the indicator that is used for showing the state, the elastic component be connected with the indicator, the elastic component be in the energy storage state when the fuse is not fused to release the energy storage and then show different states in order to drive the indicator displacement after the fuse fuses, make things convenient for audio-visual real-time supervision signal surge protector's state, be convenient for timely maintenance change, promote the indicator through the elastic component and remove and then switch the state that shows, the state of signal surge protector that can be reliable and accurate is shown, the assembly is maintained conveniently.

Further, the state indication assembly further comprises a remote signaling assembly for remote monitoring, the remote signaling assembly is touched by the indicating piece, and the touch state of the remote signaling assembly is changed when the indicating piece displaces, so that the signal surge protector has a remote monitoring function, the signal surge protector is convenient to monitor the state of the signal surge protector in a remote and real-time manner, and is convenient to maintain in time.

Furthermore, including base and module head, surge protection subassembly and the disconnected subassembly setting of inefficacy section on the module head, the module head be connected with the base plug, it is more convenient to use, be convenient for maintain the change.

Furthermore, the module head is provided with a golden finger, the golden finger forms an electrode end of the signal surge protector, and the base is provided with a spring plate for the golden finger to be inserted, so that the structure is compact, the plug-in connection reliability is high, and the implementation cost is low.

Compared with the prior art, the utility model discloses the advantage lies in:

the failure mode of the signal surge protector is an open circuit state, when the surge is too large, the fuse wire can be instantly disconnected to form the open circuit state, the voltage-limiting protection component can be prevented from being damaged by too large current continuously, and the signal surge protector has higher reliability and safety in signal line application;

the state of the signal surge protector can be monitored conveniently and visually in real time, and timely maintenance and replacement are facilitated;

the device has a remote signal output function, and can perform electromagnetic and lightning protection on a signal line and remotely monitor the state of the signal surge protector.

Drawings

Fig. 1 is a schematic circuit diagram of a signal surge protector;

FIG. 2 is a schematic view of a status indicating assembly;

fig. 3 is a mechanical structure diagram of the signal surge protector.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The embodiment of the utility model discloses a signal surge protector can in time break off and form the open circuit state when meeting with surge current, and is high, the security is good to signal circuit's protection reliability to have the state indication function, can remote monitoring, be convenient for in time maintain the change.

A signal surge protector comprises a surge protection assembly and a failure breaking assembly, wherein the surge protection assembly comprises a voltage limiting protection assembly and a switch type protection assembly, the voltage limiting protection assembly comprises a voltage limiting element, the switch type protection assembly comprises primary protection, the switch type protection assembly is arranged between electrode ends of the signal surge protector, the switch type protection assembly mainly comprises a gas discharge tube, a gap assembly and the like, the voltage limiting protection assembly comprises secondary protection, the voltage limiting element comprises one or a combination of a transient diode and a piezoresistor, the voltage limiting protection assembly and the failure breaking assembly are connected in series between the electrode ends of the signal surge protector, and the failure breaking assembly comprises a fuse, through-flow surge of which exceeds a preset impact value and is broken.

In this embodiment, the switch-type protection component adopts a gas discharge tube 1, the voltage-limiting protection component adopts a transient diode 2, as shown in fig. 1, the electrode end of the signal surge protector comprises a working end (X1, Y1, X2, Y2) and a grounding end PE, the gas discharge tube is connected in series between the working ends, specifically, the gas discharge tube adopts a triode discharge tube, two working electrodes of the triode discharge tube are respectively connected to the working end, a grounding electrode of the triode discharge tube is connected to the grounding end, the transient diode and the failure breaking component are connected in series between the working ends, the transient diode and the failure breaking component are also connected in series between the working end and the grounding end, and the transient diode has a determined maximum conduction through-current and a maximum peak power under a certain surge current waveform;

the preset impact value of the fuse wire is less than or equal to the maximum current value of the transient diode connected in series with the fuse wire, so that the fuse wire 3 is firstly disconnected before the transient diode 2 is burnt out to form an open-circuit state, high safety and reliability of signal lightning protection are ensured, the fuse wire 3 is fused at the moment of large surge current flowing through the fuse wire, and the lightning impact capacity of the surge protector can be truly reflected, the fuse wire is linear or bent and can be determined according to the actual required energy and internal structure design of a product, the diameter of the fuse wire is reduced along with the increase of the voltage level of the transient diode, and when the voltage level of the transient diode adopted by the voltage limiting type protection assembly is 11-33V, the diameter of the fuse wire is 0.1-0.15 mm, and the length is 1-3 cm; when the voltage class of the transient diode adopted by the voltage limiting type protection component is 48-64V, the diameter of the fuse wire is 0.01-0.1 mm, the length of the fuse wire is 1-3 cm, and the diameter of the fuse wire 3 is matched with the power and the voltage of the transient diode 2.

The failure breaking assembly is further provided with a state indicating assembly 4, the state indicating assembly 4 displays a first state when the fuse wire 3 is not fused, the state indicating assembly displays a second state after the fuse wire 3 is fused, as shown in fig. 2, the state indicating assembly comprises an elastic member 41 and an indicating member 42 for displaying the states, the elastic member is connected with the indicating member, the elastic member is in an energy storage state when the fuse wire is not fused, the stored energy is released after the fuse wire is fused to drive the indicating member to displace so as to display different states, specifically, the fuse wire 1 is directly contacted with the indicating member 42 so as to indirectly limit the elastic member 41, and after the fuse wire 1 is disconnected, the elastic member pushes the indicating member to displace so as to indicate different states. The state indicating assembly further comprises a remote signaling assembly for remote monitoring, the remote signaling assembly is touched by the indicating piece, the touch state of the indicating piece to the remote signaling assembly is changed when the indicating piece displaces, the remote signaling assembly specifically can adopt a micro switch, and therefore the touch state of the micro switch is changed when the indicating piece displaces, and a remote signaling signal of state change is sent outwards. The signal surge protector is used in a signal line, functions of a remote signaling monitoring part and a state indicating part are realized in a mechanical linkage mode, additional electrification is not needed, and meanwhile, the transmission characteristic of the original signal line cannot be influenced.

When the signal surge protector is in a normal working state, when the voltage of a signal line is lower than the breakover voltage of the transient diode 2, the transient diode 2 is in a high-resistance state similar to an open circuit, and does not influence a load connected with the signal surge protector in parallel, at the moment, the state indicating assembly displays green, and meanwhile, the output port of the remote signaling assembly is in a normally closed state;

when a signal circuit suffers from lightning impulse and instantaneous fluctuation of peak overvoltage exceeding the conduction voltage of the transient diode 2 occurs, the transient diode 2 is conducted, part of current passes through the transient diode 2 and the fuse wire 3, and when the sum of clamping voltage at two ends of the conducted transient diode 2 and voltage drop at two ends of the fuse wire 3 is lower than the highest voltage which can be borne by a load, the load is protected, at the moment, the state indicating assembly still displays green, and the output port of the remote signaling assembly is in a normally closed state;

when encountering too big surge, fuse 3 takes place to blow before transient diode 2 burns out, and then elastic component release energy storage drive indicator removes and shows red, and remote signaling subassembly is changed into normally open state by the indicator touch-control that takes place to remove from normally closed state simultaneously, outwards sends the unusual signal of signal surge protector, and the failure state of signal surge protector is for opening a way this moment, can not influence the normal transmission of signal line.

In this embodiment, as shown in fig. 3, the signal surge protector adopts a plug structure, which includes a base a and a module head b, the surge protection component and the failure breaking component are disposed on the module head b, the module head b is connected to the base a in a plug manner, the module head b is provided with a gold finger b1, the gold finger b1 forms an electrode end of the signal surge protector, the base a is provided with a spring sheet a1 for the gold finger b1 to be plugged, the remote signaling component is specifically integrated in the module head b, and the electrode of the remote signaling component is also connected to the base in a manner of plugging the gold finger and the spring sheet. The module head b comprises a shell, wherein an indicating window is formed in the shell, the indicating window is matched with the state indicating assembly, different colors are displayed in the indicating window to represent different states of the signal surge protector, green is displayed to represent that the signal surge protector is in a normal working state, and red is displayed to represent that a fuse wire in the signal surge protector is disconnected, namely, the signal surge protector is failed. The base a is internally provided with a circuit board a2, the elastic sheet a1 is connected on the circuit board a2 in a welding way, the side edge of the base a is provided with a wiring port a3 which is connected with the circuit board and is used for being connected with the outside, the elastic sheet a1 is provided with a contact which is used for being contacted with a golden finger b1, and is also provided with a remote communication line welding point and a circuit board welding foot, the structure is simple, the application range of standardized customized parts is wide, namely, the function of the elastic sheet can be flexibly selected according to the actual requirement, whether the elastic sheet is used for being connected with an electrode end of a signal surge protector or connected with an electrode of a remote communication assembly is determined, if the elastic sheet is used for being connected with the electrode end of the signal surge protector, the elastic sheet is only connected on the circuit board welding foot in a welding way, the remote communication line welding point is in a vacant state, and the elastic sheet is electrically connected with the wiring port of a working signal line through a printed line on the circuit board, if the elastic sheet is used for being connected with the electrode of the remote communication assembly, the elastic sheet is welded on the circuit board through a welding foot of the circuit board, a welding point of the remote communication line is connected with the remote communication line and is electrically connected to a wiring port of the remote communication line through the remote communication line, the base a is provided with a U-shaped notch for accommodating the module head b, the bottom of the U-shaped notch is provided with an anti-reverse jack, and the module head b is provided with an anti-reverse plug pin matched with the anti-reverse jack.

The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the spirit and scope of the invention, and such modifications and enhancements are intended to be within the scope of the invention.

Claims

1. A signal surge protector is characterized by comprising a surge protection assembly and a failure breaking assembly, wherein the surge protection assembly comprises a voltage limiting type protection assembly formed by a voltage limiting type element, the voltage limiting type protection assembly and the failure breaking assembly are connected in series between electrode ends of the signal surge protector, and the failure breaking assembly is a fuse wire which is broken when the through-flow surge exceeds a preset impact value.

2. The signal surge protector of claim 1, wherein the fuse has a predetermined surge value less than or equal to a maximum current value of the voltage limiting protection component.

3. A signal surge protector according to claim 1, wherein said fuse is of a straight or curved type.

4. The signal surge protector of claim 1, wherein the diameter of the fuse decreases as the voltage level of the voltage limiting protection component increases.

5. The signal surge protector of claim 1, wherein the voltage limiting element comprises one or a combination of a transient diode and a voltage dependent resistor.

6. The signal surge protector according to claim 5, wherein when the voltage class of the transient diode adopted by the voltage limiting protection component is 11-33V, the diameter of the fuse is 0.1-0.15 mm; when the voltage class of the transient diode adopted by the voltage limiting type protection component is 48-64V, the diameter of the fuse wire is 0.01-0.1 mm.

7. A signal surge protector according to any of claims 1 to 6, wherein the fail-safe assembly is further provided with a status indicating assembly, the status indicating assembly comprises an elastic member and an indicating member for indicating the status, the elastic member is connected with the indicating member, the elastic member is in a stored energy state when the fuse is not fused, and releases the stored energy after the fuse is fused to drive the indicating member to displace to indicate different statuses.

8. The signal surge protector of claim 7, wherein the status indicating assembly further comprises a remote signaling assembly for remote monitoring, the remote signaling assembly is touched by an indicating member, and the state of touch to the remote signaling assembly is changed when the indicating member is displaced.

9. A signal surge protector according to any of claims 1 to 6, comprising a base and a modular head, wherein the surge protection assembly and the fault breaking assembly are arranged on the modular head, and the modular head is connected with the base in a plugging manner.

10. The signal surge protector according to claim 9, wherein a gold finger is disposed on the module head, the gold finger forms an electrode end of the signal surge protector, and a spring plate for the gold finger to be inserted is disposed on the base.