CN214255707U - Surge protector - Google Patents

Abstract

The utility model discloses a surge protector, including overvoltage protection unit and the main part piece that is used for bearing overvoltage protection unit, overvoltage protection unit including the voltage limiting type protection component and the tripping device of establishing ties, voltage limiting type protection component's a pin and tripping device break away from shell fragment welding and constitute and break away from the solder joint, two at least overvoltage protection units establish ties into series circuit all the way, two at least way series circuit are parallelly connected in order to constitute cluster and protection subassembly, and the series circuit of cluster and protection subassembly is side by side and spaced apart setting on the main part piece. Surge protector adopt a plurality of voltage limiting type protection element to constitute the many protective circuit of many strings of and, can effectively increase the through-current capacity to every voltage limiting type protection element all is provided with tripping device, improves the disconnection protective properties when meeting with especially big overcurrent, compact structure is good, reduces surge protector's whole volume, satisfies miniaturized requirement.

Description

Surge protector

Technical Field

The utility model relates to an electric protection device technical field especially relates to a surge protector.

Background

A surge protector is an electronic device for providing safety protection for various electronic equipment, instruments and meters and communication lines. When the peak current or voltage is suddenly generated in an electric loop or a communication line due to external interference, the surge protector can conduct and shunt in a very short time, so that equipment or a system is prevented from being damaged by impact.

Current wind-powered electricity generation, surge protector of direct lightning current capacity is required to be satisfied in the photovoltaic project, and the volume can adapt to the limited problem of assembly space that leads to after the miniaturization gradually, and need satisfy like wind-powered electricity generation 760VAC, the test requirement of 10/350us wave form is satisfied simultaneously to photovoltaic 900VDC high voltage, but there is the restriction to surge protector's overall dimension, simultaneously will satisfy the insulating requirement under the high pressure through reasonable structural design and overall arrangement under limited size, and current surge protector of the same type is because of structural design is not compact, the component layout is unreasonable, occupation space is great, can't satisfy the requirement of wind-powered electricity generation and photovoltaic project miniaturization day by day.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve and the technical task who provides improve prior art, provide a surge protector, solve the surge protector among the prior art because of the structure is not compact, can't satisfy wind and photovoltaic to higher operating voltage, satisfy 10/350us through-flow capacity and little volume application requirement's problem simultaneously.

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

a surge protector comprises an overvoltage protection unit and a main body part used for bearing the overvoltage protection unit, wherein the overvoltage protection unit comprises a voltage-limiting protection element and a tripping mechanism which are connected in series, a pin of the voltage-limiting protection element and a tripping mechanism are welded to form a breaking-away welding point, at least two overvoltage protection units are connected in series to form a series line, at least two series lines are connected in parallel to form a series-parallel protection assembly, and the series lines of the series-parallel protection assembly are arranged on the main body part in a parallel mode and spaced. The surge protector of the utility model adopts a plurality of voltage-limiting protection elements to form a protection circuit with a plurality of strings and a plurality of parallel connections, can improve the working voltage and effectively increase the through-current capacity, and each voltage-limiting protection element is provided with a tripping mechanism, namely each voltage-limiting protection element has the protection function of overload disconnection, when the overvoltage current is over-large, the temperature of the voltage-limiting protection device is rapidly increased, the voltage-limiting protection element is tripped by a breaking spring sheet to disconnect the circuit, the surge protector effectively protects equipment, improves the use safety, improves the protection performance when the overvoltage current is over-large, and can reduce the performance requirement on a single voltage-limiting protection element by adopting a plurality of strings and a plurality of parallel connections, thereby reducing the volume of the single voltage-limiting protection element, and can effectively improve the structural compactness by adopting the structural layout of parallel connection lines which are arranged side by side and spaced, therefore, the overall size of the surge protector is reduced, and the requirement of miniaturization is met.

Furthermore, the series circuit connect in parallel have two tunnel, the bilateral symmetry of main part sets up one kind respectively the series circuit, compact structure, occupation space is little under the condition that satisfies the insulation requirement to two tunnel series circuits are separated by the interlayer that sets up on the main part between, make overvoltage protection unit keep apart each other, avoid the interact, improve insulating isolation effect, improve the protective properties.

Furthermore, the single-path series circuit comprises two overvoltage protection units, the two overvoltage protection units are symmetrically arranged, and tripping mechanisms of the two overvoltage protection units are located in the middle of the series circuit and are connected with each other, so that the structure is more compact, and the occupied space is reduced.

Furthermore, the separating elastic pieces of the two tripping mechanisms in the single-path series circuit are formed by integrally forming an elastic piece, so that the structure is more compact, the number of parts is reduced, and the assembly is more rapid and convenient.

Furthermore, the middle part of the elastic sheet is bent in a U shape, and two side walls of the U-shaped bent are bent towards two sides and extended to form the separation elastic sheet, so that the structural stability of the elastic sheet is improved, the elastic sheet is ensured to have reliable elasticity, and the elastic sheet can be separated from the pin of the voltage limiting protection element by a sufficient distance due to the elasticity of the elastic sheet after the separation elastic sheet is tripped from the pin of the voltage limiting protection element due to extra-large overload current, so that the protection performance is improved, and the use safety is improved.

Furthermore, the U-shaped bent part of the elastic sheet is connected with a reinforcing strip which plays a role in reinforcing fixation, the stability of the elastic sheet is enhanced, and the separation of the elastic sheet from the pins of the voltage-limiting protection element can be separated from the pins of the voltage-limiting protection element by a sufficient distance due to the elasticity of the separation of the elastic sheet from the pins of the voltage-limiting protection element after the separation of the elastic sheet from the pins of the voltage-limiting protection element is released.

Furthermore, the reinforcing strips are located on the inner side of the U-shaped bent part and are connected with two side walls of the U-shaped bent part in an attaching mode, the structure is compact, the occupied space is small, and the working reliability of the separated elastic pieces is guaranteed.

Furthermore, the outside of the voltage limiting type protection element is covered with a cover body, a through hole is formed in the cover body, and a pin of the voltage limiting type protection element and a separation elastic sheet positioned outside the cover body are welded at the through hole to form a separation welding point, so that the voltage limiting type protection element can be effectively isolated, mutual influence is avoided, the insulation isolation effect is improved, and the protection performance is improved.

Furthermore, the tripping mechanism also comprises an isolating piece and an elastic piece, wherein the elastic piece is in an energy storage state before the pin of the separation shrapnel and the voltage-limiting protection element are not disconnected, and pushes the isolating piece to move to a position between the pin of the separation shrapnel and the voltage-limiting protection element for electrical isolation after the separation of the pin of the separation shrapnel and the voltage-limiting protection element.

Furthermore, still be provided with the remote signalling device that corresponds with every tripping device on the main part, the separator on be provided with the remote signalling portion that is used for triggering the remote signalling device, whole remote signalling devices are drawn forth by inserting the terminal combination fast after establishing ties through the PCB board, can carry out remote signalling monitoring to the state of every tripping device, ensure that the operating condition of mastering surge protector that can be timely improves maintenance efficiency.

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

surge protector adopt a plurality of voltage limiting type protection element to constitute the many protective circuit of many serials and, can effectively increase the through-current capacity, and every voltage limiting type protection element all is provided with tripping device, improve the disconnection protective property when meeting with especially big overcurrent, and the integral type mounting structure is adopted in the series connection assembly, constitute independent series module, two independent series module symmetrical assembly, the realization is parallelly connected, reach make full use of assembly space under the condition that satisfies the insulation requirement, reach compact design, reduce surge protector's whole volume, satisfy miniaturized requirement.

Drawings

Fig. 1 is a schematic view of the internal structure of a surge protector;

fig. 2 is a schematic cross-sectional view of a surge protector;

FIG. 3 is a schematic structural diagram of the connection of the voltage-limiting protection element, the trip mechanism and the switch-type protection element;

fig. 4 is a schematic view of a connection structure of the detachment spring plate and the reinforcing strip.

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 surge protector, compact structure satisfies the requirement of big throughput capacity when reducing occupation space, and protective properties is good.

As shown in fig. 1 to 4, a surge protector mainly includes an overvoltage protection unit and a main body 1 for carrying the overvoltage protection unit, the overvoltage protection unit includes a voltage-limiting protection element 2 and a tripping mechanism 3 connected in series, a pin of the voltage-limiting protection element 2 is welded with a disengaging spring 31 of the tripping mechanism 3 to form a disengaging solder joint, in this embodiment, two overvoltage protection units are connected in series to form a series circuit, two series circuits are connected in parallel to form a series-parallel protection assembly, two sides of the main body 1 are symmetrically provided with one series circuit respectively, the two series circuits are separated by an interlayer 11 provided on the main body 1, and the series-parallel protection assembly is further connected in series with a switch-type protection element 4 for combined protection, specifically, the voltage-limiting protection element 2 employs a voltage dependent resistor, the switch-type protection element 4 employs a gas discharge tube, the outer part of the main body part 1 is covered with a shell so as to effectively protect the voltage-limiting type protection element 2, the tripping mechanism 3, the voltage-limiting type protection element 2 and other devices, and the working reliability is guaranteed.

In this embodiment, two overvoltage protection units in the single-path serial line are symmetrically arranged, the tripping mechanisms 3 of the two overvoltage protection units are located in the middle of the serial line and are connected with each other, in terms of circuit form, namely, the voltage limiting type protection element 2 is close to two ends of the serial line, the tripping mechanism 3 is close to the middle of the serial line, the disengaging shrapnels 31 of the tripping mechanisms 3 of the two overvoltage protection units are electrically connected to form a serial line structure, and the symmetrical arrangement of the two overvoltage protection units represents the symmetrical arrangement on the circuit and also represents the symmetrical arrangement on the structural layout;

in order to improve the structure compactness, the separating elastic sheet 31 of the two tripping mechanisms 3 in the single-way series circuit is formed by integrally molding an elastic sheet, specifically, the middle part of the elastic sheet is bent in a U shape, two side walls of the U-shaped bend are respectively bent and extended towards two sides to form a separation elastic sheet 31, moreover, the U-shaped bent part of the elastic sheet is connected with a reinforcing strip 32, the reinforcing strip 32 is positioned at the inner side of the U-shaped bent part and is jointed and connected with two side walls of the U-shaped bent part, the reinforcing strip 32 has a fixing effect on the elastic sheet, so that the separation elastic sheet 31 has a stable tripping and separating function, the separation elastic sheet 31 can be effectively separated from the pin of the voltage-limiting protection element 2 when being tripped from the pin of the voltage-limiting protection element 2, the stable protection performance is ensured, the two separation elastic sheets 31 are integrated into a whole, the structure compactness is improved, and the assembly is more convenient;

in order to ensure that each voltage limiting type protection element 2 can work independently and stably, a cover body 5 is covered outside each voltage limiting type protection element 2, the cover body 5 is matched with the main body part 1 to wrap the voltage limiting type protection element 2, a through hole is arranged on the cover body 5, a pin of each voltage limiting type protection element 2 and a separation elastic sheet 31 positioned outside the cover body 5 are welded at the through hole to form a separation welding point, the voltage limiting type protection elements 2 are prevented from being influenced with each other, the insulation isolation effect is improved, and the protection performance is improved, in the embodiment, the cover body 5 covering two voltage limiting type protection elements 2 in a single-way series circuit is combined into a whole cover, the structure is compact, the assembly is easy, the two voltage limiting type protection elements 2 in the single-way series circuit are respectively placed against the interlayer 11, and the middle part of the interlayer 11 is provided with a bulge for separating the two voltage limiting type protection elements 2, the integral cover covers the pressure-limiting type protection elements 2, the integral cover is matched with the bulges in the middle of the interlayer 11 to completely separate the two pressure-limiting type protection elements 2, a limiting groove is formed in the middle of the integral cover, and the U-shaped bend of the elastic sheet is placed in the limiting groove to be fixed.

The tripping mechanism 3 further comprises an isolating piece 33 and an elastic piece 34, the elastic piece 34 is in an energy storage state before the pin of the separation shrapnel 31 and the voltage-limiting protection element 2 is not disconnected, and the isolating piece 33 is pushed to move to the position between the pin of the separation shrapnel 31 and the pin of the voltage-limiting protection element 2 for electrical isolation after the pin of the separation shrapnel 31 and the pin of the voltage-limiting protection element 2 are separated, specifically, the elastic piece 34 is a spring, one end of the spring is connected on the cover body, the other end of the spring is connected with the isolating piece 33, the isolating piece 33 is positioned between the separation shrapnel 31 and the cover body 5, when the separation shrapnel 31 and the pin of the voltage-limiting protection element 2 are in a connection state, the isolating piece 33 is abutted against the separation welding point of the separation shrapnel 31 and the pin of the voltage-limiting protection element 2 under the action of the elastic piece 34, and after the separation shrapnel 31 and the pin of the voltage-limiting protection element 2 are tripped, the elastic piece 34 pushes the isolating piece 33 to move between the separating spring plate 31 and the pin of the voltage limiting type protection element 2 so as to shield the through hole, thereby achieving the arc shielding effect, effectively isolating the separating spring plate 31 from the pin of the voltage limiting type protection element 2 and improving the protection performance.

The main body part 1 is further provided with a remote signaling device 6 corresponding to each tripping mechanism 3, the isolating part 33 is provided with a remote signaling part 331 used for triggering the remote signaling device 6, the position of the isolating part 33 can be changed before and after the pin which is separated from the elastic sheet 31 and the voltage-limiting type protection element 2 is tripped, so that the working state of the surge protector can be indicated by the isolating part 33, the remote signaling part 331 can be used for triggering the remote signaling device 6 when the isolating part 33 is displaced, the signal of the working state of the surge protector can be timely sent out, the maintenance is convenient in time, all the remote signaling devices 6 are combined and led out after being connected in series through the PCB 61, and each tripping mechanism 3 can be monitored.

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 (10)

1. A surge protector is characterized by comprising an overvoltage protection unit and a main body part (1) used for bearing the overvoltage protection unit, wherein the overvoltage protection unit comprises a voltage-limiting protection element (2) and a tripping mechanism (3) which are connected in series, a pin of the voltage-limiting protection element (2) and a tripping elastic sheet (31) of the tripping mechanism (3) are welded to form a tripping welding point, at least two overvoltage protection units are connected in series to form a series circuit, at least two series circuits are connected in parallel to form a series-parallel protection assembly, and the series circuits of the series-parallel protection assembly are arranged on the main body part (1) side by side and spaced.

2. A surge protector according to claim 1, wherein the series connection is formed by two parallel lines, wherein one of the series connection is symmetrically arranged on both sides of the main body member (1), and the two series connections are separated by a spacer (11) arranged on the main body member (1).

3. A surge arrester as claimed in claim 1, wherein the series line of one path comprises two overvoltage protection units, and the two overvoltage protection units are arranged symmetrically, and trip mechanisms (3) of the two overvoltage protection units are located in the middle of the series line and are connected to each other.

4. A surge arrester as claimed in claim 3, wherein the disengaging springs (31) of the two tripping mechanisms (3) in the single-circuit series circuit are integrally formed from a single resilient piece.

5. A surge arrester as claimed in claim 4, wherein the resilient portion is bent in a U-shape, and two side walls of the U-shape are bent and extended to form the releasing resilient piece (31).

6. A surge arrester as claimed in claim 5, wherein a reinforcing strip (32) is connected to the U-shaped bend of the resilient piece.

7. A surge arrester as claimed in claim 6, wherein the reinforcing strip (32) is located inside the U-shaped bend and is in abutting engagement with both side walls of the U-shaped bend.

8. A surge protector according to any of claims 1 to 7, wherein the voltage limiting type protection element (2) is further covered with a cover body (5), the cover body (5) is provided with a through hole, and a pin of the voltage limiting type protection element (2) and a separation spring sheet (31) positioned outside the cover body (5) are welded at the through hole to form a separation welding point.

9. A surge protector according to claim 8, wherein the trip mechanism (3) further comprises a spacer (33) and an elastic member (34), the elastic member (34) is in an energy storage state before the pin of the voltage limiting protection element (2) is disconnected from the spring (31), and pushes the spacer (33) to move to a position where the spring (31) is separated from the pin of the voltage limiting protection element (2) for electrical isolation.

10. A surge protector according to claim 9, wherein the main body member (1) is further provided with a remote signaling device (6) corresponding to each tripping mechanism (3), the spacer member (33) is provided with a remote signaling unit (331) for triggering the remote signaling devices (6), and all the remote signaling devices (6) are connected in series through the PCB (61) and then combined and led out.

Images