CN211296183U - DC impact voltage protector - Google Patents

Abstract

The utility model relates to a direct current impulse voltage protector, including the main casing body and installing two piezoresistors in the main casing body inside, the main casing body is equipped with positive terminal port, ground connection port, negative pole port, positive terminal port, negative pole port pass through wire and protected device positive negative pole parallel connection, a piezoresistor one end of positive terminal port electric connection, another piezoresistor one end of negative pole port electric connection, two piezoresistor other end electric connection ground connection ports, ground connection port is used for ground connection, when the voltage through protected device is the normal value, the piezoresistor resistance presents infinite state, almost no electric current passes through; when the voltage increase through the protected device exceeds the normal value, the resistance value of the piezoresistor is quickly reduced, and the current is conducted and shunted through realization, so that the direct-current impact voltage is prevented from damaging the electric appliance, the response speed is high, the structural design is simple, and the use requirement is met.

Description

DC impact voltage protector

Technical Field

The utility model relates to an electrical equipment field, concretely relates to direct current impulse voltage protector.

Background

When the direct current impact voltage protector is used, the protected electrical equipment is connected in parallel, and when spike current or voltage is suddenly generated in a circuit due to external interference, shunt is conducted within a very short time, so that damage of direct current impact to other equipment in a loop is avoided. The existing direct current surge voltage protector has the defects of slow response, complex structure and difficult installation and slow assembly.

SUMMERY OF THE UTILITY MODEL

To the defect that prior art exists, the utility model provides a direct current surge voltage protector that structural design is simple reasonable, the response is fast, concrete technical scheme as follows:

the utility model provides a direct current surge voltage protector, includes the main casing body and installs two piezo-resistors in the main casing body inside, the main casing body is equipped with anodal port, ground connection port, negative pole port, anodal port, negative pole port pass through wire and by the positive negative pole parallel connection of protection device, a piezo-resistor one end of anodal port electric connection, another piezo-resistor one end of negative pole port electric connection, two piezo-resistor other end electric connection ground connection ports, ground connection port is used for ground connection.

As a preferred scheme of the utility model, still include two thermal failure disconnector, thermal failure disconnector and piezoresistor series connection.

As a preferred scheme of the utility model, the main casing body includes upper cover and lower cover, and the upper cover side is equipped with the recess, and the lower cover is equipped with the card protruding corresponding with groove position, and the lower cover is gone into through the protruding card of card and is realized imbedding the upper cover in the recess.

As the utility model discloses a preferred scheme, anodal port, ground connection port, negative pole port are located the lower part and cover the position, and the upper cover is equipped with respectively with anodal port, ground connection port, the corresponding mounting hole in negative pole port position, installation screw in the mounting hole, screws the screw and compresses tightly the wire that gets into anodal port, ground connection port, negative pole port.

As an optimal proposal of the utility model, the middle parts of the upper cover and the lower cover form a piezoresistor installation cavity.

The utility model has the advantages that: the positive terminal port and the negative terminal port of the two piezoresistors in the main shell are connected with the positive electrode and the negative electrode of the protected device in parallel through leads, and when the voltage passing through the protected device is a normal value, the resistance value of the piezoresistor is in an infinite state and almost no current passes through the piezoresistor; when the voltage increase through the protected device exceeds the normal value, the resistance value of the piezoresistor is quickly reduced, and the current is conducted and shunted through realization, so that the direct-current impact voltage is prevented from damaging the electric appliance, the response speed is high, the structural design is simple, and the use requirement is met.

Drawings

FIG. 1 is a schematic diagram of the present invention;

fig. 2 is a perspective view of the main housing of the present invention;

fig. 3 is an exploded view of the main housing of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:

in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the indicated position or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.

As shown in fig. 1, a dc impact voltage protector comprises a main housing 1 and two piezoresistors 2 installed inside the main housing 1, wherein the main housing 1 is provided with a positive electrode port 3, a ground port 4 and a negative electrode port 5, the positive electrode port 3 and the negative electrode port 5 are connected in parallel with the positive electrode and the negative electrode of a protected device through wires, the positive electrode port 3 is electrically connected with one end of one piezoresistor 2, the negative electrode port 5 is electrically connected with one end of the other piezoresistor 2, the other ends of the two piezoresistors 2 are electrically connected with the ground port 4, the ground port 4 is used for grounding, and the main material of the piezoresistor 2 is composed of divalent element zinc (Zn) and hexavalent element oxygen (O). When the voltage passing through the protected device is a normal value, the resistance value of the piezoresistor 2 is in an infinite state, and almost no current passes through; when the voltage passing through the protected device is increased to exceed the normal value, the resistance value of the piezoresistor 2 is rapidly reduced, and current is conducted and shunted.

Specifically, the dc surge protector further comprises two thermal failure disconnectors 6, and the thermal failure disconnectors 6 are connected in series with the piezoresistor 2.

As shown in fig. 2 and 3, the main housing 1 includes an upper cover 11 and a lower cover 12, a groove 11a is formed on a side surface of the upper cover 11, a protrusion 12a corresponding to the groove 11a is formed on the lower cover 12, the lower cover 12 is clamped into the groove 11a through the protrusion 12a to be embedded into the upper cover 11, a piezoresistor installation chamber 13 is formed by covering middle portions of the upper cover 11 and the lower cover 12, the upper cover 11 and the lower cover 12 are assembled quickly and conveniently, the positive port 3, the ground port 4 and the negative port 5 are located on the lower cover 12, the upper cover 11 is provided with installation holes 14 corresponding to positions of the positive port, the ground port and the negative port, screws are installed in the installation holes 14, and the screws are screwed to press wires entering the positive port 3, the ground port 4 and the negative port 5, so that the dc impact voltage protector can be connected with external electrical appliance wires and ground wires.

The above description is provided for the purpose of describing the present invention in more detail with reference to the preferred embodiments, and it should not be construed that the present invention is limited to these descriptions, and it will be apparent to those skilled in the art that the present invention can be implemented in many ways without departing from the spirit and scope of the present invention.

Claims (5)

1. A kind of direct-flow surge voltage protector, characterized by: the high-voltage power supply comprises a main shell and two piezoresistors arranged in the main shell, wherein the main shell is provided with an anode port, a grounding port and a cathode port, the anode port and the cathode port are connected with the anode and the cathode of a protected device in parallel through wires, the anode port is electrically connected with one end of one piezoresistor, the cathode port is electrically connected with one end of the other piezoresistor, the other ends of the two piezoresistors are electrically connected with the grounding port, and the grounding port is used for grounding.

2. A dc surge voltage protector according to claim 1, wherein: two thermal deactivators are also included, the thermal deactivators being connected in series with the piezoresistors.

3. A dc surge voltage protector according to claim 1, wherein: the main casing body includes upper cover and lower cover, and the upper cover side is equipped with the recess, and the lower cover is equipped with the card protruding corresponding with the recess position, and the lower cover realizes imbedding the upper cover through the protruding card income recess.

4. A dc surge voltage protector according to claim 3, wherein: the positive port, the grounding port and the negative port are positioned on the upper part of the lower cover, the upper cover is provided with mounting holes corresponding to the positive port, the grounding port and the negative port respectively, screws are mounted in the mounting holes, and the screws are screwed to tightly press wires entering the positive port, the grounding port and the negative port.

5. A dc surge voltage protector according to claim 3, wherein: the middle parts of the upper cover and the lower cover form a piezoresistor installation chamber.

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