CN109412129B

CN109412129B - Overvoltage current drainage pressure relief protection device of surge protector of power box

Info

Publication number: CN109412129B
Application number: CN201811275044.XA
Authority: CN
Inventors: 陈明治
Original assignee: Hangzhou Chuangding Electric Co ltd
Current assignee: Hangzhou Chuangding Electric Co ltd
Priority date: 2018-10-30
Filing date: 2018-10-30
Publication date: 2021-05-11
Anticipated expiration: 2038-10-30
Also published as: CN109412129A

Abstract

The invention relates to an overvoltage current drainage pressure relief protection device of a surge protector of a power box, which structurally comprises: the surge protector is embedded in the power box body, when the surge protector is attacked by overvoltage current generated by continuous surge, the overvoltage current flowing in a connecting circuit line is guided and dispersed by the pressure relief protection device through the internal drainage device, the current on the connecting circuit line is reduced and then flows into the metal oxide rheostat to be subjected to voltage reduction treatment, and meanwhile, the guided redundant current is utilized to drive the current conversion device to carry out fan-motion circulation on air around the metal oxide rheostat, so that the metal oxide rheostat is subjected to current reduction treatment at a proper temperature, and the phenomenon that the metal oxide rheostat is over-high in temperature and corrodes the internal metal conductive wire to influence the treatment of the current to cause the damage of precise electronic elements in the power box is avoided.

Description

Overvoltage current drainage pressure relief protection device of surge protector of power box

Technical Field

The invention discloses an overvoltage current drainage pressure relief protection device of a surge protector of an electric power box, and relates to the field of electric power maintenance.

Background

The power box is a device for controlling the flow direction of a plurality of circuits, can regulate and control the power distribution trend of the circuits, controls the size of power, and simultaneously enables an operator to carry out maintenance and debugging on the circuits and detection and maintenance on the circuits so as to maintain the normal operation of surrounding power equipment.

However, in the power box connected with a plurality of large-scale power devices, due to the transition process of electromagnetic energy conversion or transmission inside the power caused by the start and stop of the large-scale devices, overvoltage occurs inside the power system, and high-voltage current generated by the overvoltage is generally transmitted after being reduced by a surge protector inside the power box, but a metal oxide varistor used for transferring redundant voltage in the surge protector of the power box is scalded in multiple long-term surge impacts, so that oxide inside the metal oxide varistor and a middle aluminum conductive wire generate high-temperature oxidation reaction, the aluminum conductive wire is oxidized to form aluminum oxide which loses conductivity, the current transmission capability of the aluminum conductive wire is reduced, the metal oxide varistor of the surge protector in the power box cannot discharge the redundant voltage in time, and the redundant voltage impacts precise electronic elements inside the power box, resulting in the performance degradation and the shortened service life of the electronic components, and seriously affecting the use and control of the electronic components in the power box.

Therefore, an overvoltage current drainage pressure relief protection device of the surge protector of the power box needs to be provided.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides an overvoltage current drainage pressure relief protection device for a surge protector of an electric power box, which solves the problem that a metal oxide varistor in the surge protector of the electric power box is heated under long-term surge impact to corrode an intermediate aluminum conductive wire, so that the voltage reduction of the metal oxide varistor is influenced, and a precise electronic element is damaged.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an electric power box surge protector overvoltage current drainage release protection device, its structure includes: electric power box, surge protector, debugging case, controller, control cable, attach debugging case, chamber door, surge protector is installed in the inside embedding of electric power box, the debugging case has been installed to surge protector's lower surface, the controller embedding is installed in the inside of electric power box, control cable's end with attach the debugging case and be connected, attach debugging case fixed mounting in the chamber door medial surface.

As a preferable scheme of the present invention, the surge protector includes a structural casing, a live wire, a choke coil, a fuse, a pressure-relief protection device, a ground wire, a null wire, and a line extension device, the live wire is embedded in the structural casing, the choke coil is embedded in the live wire, the live wire is connected to the fuse, the right side of the live wire is electrically connected to the left end of the pressure-relief protection device, the right end of the pressure-relief protection device is connected to the ground wire, the ground wire is parallel to the null wire, and the end of the null wire is fixedly connected to the upper surface of the line extension device.

As a preferable scheme of the present invention, the pressure relief protection device includes a connection circuit line, a protective case, a current guiding device, a transmitter, an electrical control line, an electromagnet, a movable adsorption plate, a current converting device, a metal oxide varistor, and a fixed plate, the connection circuit line is embedded in the protective case, the current guiding device is embedded in the transmitter, a tail end of the electrical control line is electrically connected to a left end of the electromagnet, a right side surface of the movable adsorption plate is fixedly connected to a left side surface of the current converting device, and the metal oxide varistor is installed on the left side surface of the fixed plate.

According to the preferable scheme of the invention, the drainage device comprises a linkage frame, a drainage tip, a guide rail ring, a flow transfer point and a fixing ring, wherein the linkage frame is in transmission connection with the drainage tip, the drainage tip is embedded in the upper surface of the guide rail ring, the tail end of the drainage tip is attached to the tail end of the flow transfer point, and the flow transfer point is fixedly arranged on the upper surface of the fixing ring.

As a preferable scheme of the invention, the linkage frame comprises a linkage rod, a return spring, a bending prevention rod and a guide rod channel, wherein the inner side surface of the linkage rod is fixedly connected with two ends of the return spring, and the bending prevention rod is embedded in the guide rod channel.

As a preferable scheme of the present invention, the commutation device includes commutation fan blades and a telescopic spring, the head ends of the commutation fan blades are fixedly connected to the side edges of the telescopic spring, and the head ends of the telescopic spring are fixedly connected to the upper surface of the fixing plate.

As a preferable aspect of the present invention, the commutation fan blade includes a blade plate and a wind-dispelling hole, and the upper surface of the blade plate is provided with the wind-dispelling hole and is an integrated structure.

As a preferred scheme of the invention, the linkage frame is in transmission connection with the drainage tip, so that when the part of the drainage tip close to the connection circuit line is connected with excessive current, electromagnetic force is generated to move backwards, the linkage frame is pulled while the tail end of the drainage tip is attached to the tail end of the current transmission point to transmit the current, and the drainage tip far away from the connection circuit line is close to the connection circuit line, so that the drainage tip is convenient to conduct pressure relief in an empty mode, and the repeated contraction movement of two sets of drainage tips is utilized to conduct drainage and transmission, so that the current dredging speed is higher compared with the prior art.

As a preferable embodiment of the present invention, a current converting device is disposed on the surface of the metal oxide varistor, and the electromagnet is intermittently energized by the excess current after the voltage is released, so that the electromagnet adsorbs the movable adsorption plate to move repeatedly, the movable adsorption plate pulls the expansion spring to contract repeatedly, and the current converting fan blades on the expansion spring fan air around the metal oxide varistor, thereby promoting air circulation around the metal oxide varistor, and achieving an effect of balancing the temperature around the metal oxide varistor.

(III) advantageous effects

Compared with the prior art, the invention provides an overvoltage current drainage pressure relief protection device of a surge protector of a power box, which has the following beneficial effects:

when a surge protector in the power box is attacked by overvoltage current generated by continuous surge, the overvoltage current flowing in a connecting circuit line is guided and dispersed by the pressure relief protection device through the internal drainage device, so that the current on the connecting circuit line is reduced and then flows into the metal oxide rheostat for voltage reduction treatment, and meanwhile, the guided redundant current drives the current conversion device to fan air around the metal oxide rheostat, so that the metal oxide rheostat performs current reduction treatment at a proper temperature, and the damage of precise electronic elements in the power box caused by the influence on current treatment due to the fact that the metal oxide rheostat corrodes the internal metal conductive wire due to overhigh temperature is avoided.

Drawings

Fig. 1 is a schematic structural diagram of an overvoltage current-guiding pressure-relief protection device of a surge protector of a power box.

Fig. 2 is a structural cross-sectional view of a surge protector of the present invention.

Fig. 3 is a cross-sectional view of a pressure relief protection device in accordance with the present invention.

Fig. 4 is a right side view of a drainage device according to the present invention.

FIG. 5 is an enlarged view of a portion A of FIG. 4 according to the present invention.

Fig. 6 is a schematic structural diagram of a converter device according to the present invention.

Fig. 7 is a schematic structural diagram of a commutating fan blade according to the present invention.

Description of reference numerals: the device comprises a power box body-1, a surge protector-2, a debugging box-3, a controller-4, a control cable-5, an attached debugging box-6, a box door-7, a structural shell-21, a live wire-22, a choke coil-23, a fuse-24, a pressure relief protection device-25, a ground wire-26, a zero wire-27, a line output device-28, a connecting circuit wire-251, a protective shell-252, a drainage device-253, a transmitter-254, an electric control wire-255, an electromagnet-256, a movable adsorption plate-257, a current conversion device-258, a metal oxide varistor-259, a fixed plate-2510, a linkage frame-2531, a drainage tip-2532, a guide rail ring-2533, a current transfer point-2534, a fixed ring-2535, a control cable-5, a current transfer point-, Linkage rod-25311, reset spring-25312, anti-bending rod-25313, guide rod channel-25314, commutating fan blade-2581, expansion spring-2582, fan blade plate-25811 and wind-dispelling hole-25812.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

Referring to fig. 1-7, the present invention provides an overvoltage current-draining and pressure-relieving protection device for a surge protector of an electric power box, which comprises: electric power box 1, surge protector 2, debugging case 3, controller 4, control cable 5, attach debugging case 6, chamber door 7, surge protector 2 is installed in the inside embedding of electric power box 1, debugging case 3 has been installed to surge protector 2's lower surface, the inside in electric power box 1 is installed in the embedding of controller 4, control cable 5's end with attach debugging case 6 and be connected, attach debugging case 6 fixed mounting in the 7 medial surfaces of chamber door.

Surge protector 2 includes that structure shell 21, live wire 22, choke 23, fuse 24, release protection device 25, ground wire 26, zero line 27, circuit connect out ware 28, the inside embedded installation of structure shell 21 has live wire 22, choke 23 is nested mutually with live wire 22, live wire 22 is connected with fuse 24, the right side of live wire 22 is connected with release protection device 25's left end electricity, release protection device 25's right-hand member is connected with ground wire 26, ground wire 26 parallels with zero line 27, zero line 27's end and circuit connect out the last fixed surface of ware 28 and be connected.

The pressure relief protection device 25 comprises a connecting circuit wire 251, a protective shell 252, a flow guiding device 253, a transmitter 254, an electric control wire 255, an electromagnet 256, a movable adsorption plate 257, a current converting device 258, a metal oxide varistor 259 and a fixing plate 2510, wherein the connecting circuit wire 251 is embedded and installed inside the protective shell 252, the flow guiding device 253 is embedded and installed inside the transmitter 254, the tail end of the electric control wire 255 is electrically connected with the left end of the electromagnet 256, the right side surface of the movable adsorption plate 257 is fixedly connected with the left side surface of the current converting device 258, and the metal oxide varistor 259 is installed on the left side surface of the fixing plate 2510.

The drainage device 253 includes the link frame 2531, the drainage tip 2532, the guide rail ring 2533, the flow point 2534, solid fixed ring 2535, the link frame 2531 is connected with the transmission of drainage tip 2532, the embedding of drainage tip 2532 is installed in the upper surface of guide rail ring 2533, the end of drainage tip 2532 is laminated with the end of flow point 2534 mutually, flow point 2534 fixed mounting is in solid fixed ring 2535's upper surface.

The linkage bracket 2531 comprises a linkage rod 25311, a return spring 25312, a bending prevention rod 25313 and a guide rod channel 25314, wherein the inner side surface of the linkage rod 25311 is fixedly connected with two ends of the return spring 25312, and the bending prevention rod 25313 is embedded in the guide rod channel 25314.

The commutation device 258 comprises commutation fan blades 2581 and a telescopic spring 2582, the head ends of the commutation fan blades 2581 are fixedly connected with the side edge of the telescopic spring 2582, and the head ends of the telescopic spring 2582 are fixedly connected with the upper surface of the fixing plate 2510.

The commutating fan blade 2581 comprises a fan blade plate 25811 and a wind-dispelling hole 25812, wherein the wind-dispelling hole 25812 is arranged on the upper surface of the fan blade plate 25811 and is of an integrated structure.

Through the transmission connection of link frame 2531 and the most advanced 2532 of drainage, make the most advanced 2532 of drainage connect when leading to the electric current of many-outs near the part of connecting circuit line 251, produce electromagnetic force rearward movement, in the time of the terminal laminating transmission current with biography flow point 2534, pulling link frame 2531, make the most advanced 2532 of drainage of keeping away from connecting circuit line 251 become and be close to connecting circuit line 251, thereby make things convenient for the most advanced 2532 of drainage to separate the empty electrically conductive pressure release that carries out, utilize two sets of most advanced 2532 of drainage's repeated shrink to remove to carry out the drainage and transmit, compare prior art and have faster electric current and dredge speed.

The surface of the metal oxide varistor 259 is provided with a current converting device 258, and the electromagnet 256 is intermittently energized by using the excess current after pressure relief, so that the electromagnet 256 adsorbs the movable adsorption plate 257 to move repeatedly, the movable adsorption plate 257 pulls the expansion spring 2582 to contract repeatedly, the current converting fan blade 2581 on the expansion spring 2582 fans the air around the metal oxide varistor 259, and the air around the metal oxide varistor 259 is promoted to circulate, thereby achieving the effect of balancing the temperature around the metal oxide varistor 259.

The linkage frame 2531 is provided with the anti-bending rod 25313 and the guide rod channel 25314, and the nesting between the anti-bending rod 25313 and the guide rod channel 25314 is utilized, so that the auxiliary linkage frame 2531 cannot bend and release force when contracting and pulling the drainage tip 2532, the linkage force between the drainage tip 2532 and the drainage tip 2532 is effectively transmitted, and the movement of the drainage tip 2532 is more regular and stable.

The commutating fan blade 2581 is provided with the wind-dispelling hole 25812, when the commutating fan blade 2581 expands and contracts to fan the air around the metal oxide varistor 259, the wind-dispelling hole 25812 on the commutating fan blade 2581 is used for assisting the flow of wind power, so that the air around the wind-dispelling hole 25812 circulates faster, and the effect of accelerating the air exchange around the metal oxide varistor 259 is achieved.

The working principle is as follows: when continuous internal surge is generated during starting and stopping of large equipment around the power box, overvoltage current generated by the surge enters the surge protector 2 of the power box to be subjected to voltage reduction treatment, the overvoltage current flows to the periphery of the drainage device 253 from the connecting circuit wire 251, the connecting circuit wire 251 is subjected to space discharge under the conduction of the tip of the drainage tip 2532, part of the overvoltage current flows into the drainage tip 2532, the current flows to the electromagnet 256 part under the transmission of the drainage tip 2532 to generate intermittent magnetic force, the adsorption and movement adsorption plate 257 is moved, so that the expansion spring 2582 on the commutation device 258 is pulled, the expansion spring 2582 continuously expands and contracts to pull the commutation fan blade 2581 to fan on the metal oxide varistor 259, air around the metal oxide varistor 259 is allowed to flow, and the temperature generated by the metal oxide varistor 259 during treatment of the overvoltage current is accelerated to dissipate, therefore, the temperature of the metal oxide varistor 259 is reduced, corrosion caused by high-temperature oxidation reaction between the oxide inside the metal oxide varistor 259 and the metal wire at high temperature is avoided, the metal wire has normal good conductivity, overvoltage current is reduced, and electronic elements inside the power box are prevented from being damaged by the overvoltage current.

Has the advantages that: when the surge protector 2 inside the power box is attacked by the overvoltage current generated by the continuous surge, the pressure relief protection device 25 guides and disperses the overvoltage current flowing in the connecting circuit line 251 through the internal current guiding device 253, so that the current on the connecting circuit line 251 is reduced and then flows into the metal oxide varistor 259 for voltage reduction treatment, and the guided redundant current drives the current conversion device 258 to fan the air around the metal oxide varistor 259 for current reduction treatment at a proper temperature, thereby avoiding the damage of the precise electronic elements inside the power box caused by the influence of the high corrosion of the internal metal conductive wire due to the high temperature of the metal oxide varistor 259 on the current treatment.

The specific embodiments described herein are merely illustrative of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims appended hereto.

Claims

1. The utility model provides an electric power box surge protector overvoltage current drainage release protection device, its structure includes: electric power box (1), surge protector (2), debugging case (3), controller (4), control cable (5), attach debugging case (6), chamber door (7), its characterized in that:

the surge protector (2) is embedded in the power box body (1), the debugging box (3) is arranged on the lower surface of the surge protector (2), the controller (4) is embedded in the power box body (1), the tail end of the control cable (5) is connected with the auxiliary debugging box (6), and the auxiliary debugging box (6) is fixedly arranged on the inner side surface of the box door (7);

the surge protector (2) comprises a structural shell (21), a live wire (22), a choke coil (23), a fuse (24), a pressure relief protection device (25), a ground wire (26), a zero wire (27) and a line leading-out device (28), wherein the live wire (22) is embedded in the structural shell (21), the choke coil (23) is embedded in the live wire (22), the live wire (22) is connected with the fuse (24), the right side of the live wire (22) is electrically connected with the left end of the pressure relief protection device (25), the right end of the pressure relief protection device (25) is connected with the ground wire (26), the ground wire (26) is parallel to the zero wire (27), and the tail end of the zero wire (27) is fixedly connected with the upper surface of the line leading-out device (28);

the pressure relief protection device (25) comprises a connecting circuit line (251), a protective shell (252), a flow guide device (253), a transmitter (254), an electric control line (255), an electromagnet (256), a movable adsorption plate (257), a converter device (258), a metal oxide varistor (259) and a fixing plate (2510), wherein the connecting circuit line (251) is embedded in the protective shell (252), the flow guide device (253) is embedded in the transmitter (254), the tail end of the electric control line (255) is electrically connected with the left end of the electromagnet (256), the right side surface of the movable adsorption plate (257) is fixedly connected with the left side surface of the converter device (258), and the metal oxide varistor (259) is arranged on the left side surface of the fixing plate (2510);

the drainage device (253) comprises a linkage frame (2531), a drainage tip (2532), a guide rail ring (2533), a flow transmission point (2534) and a fixing ring (2535), the linkage frame (2531) is in transmission connection with the drainage tip (2532), the drainage tip (2532) is embedded in the upper surface of the guide rail ring (2533), the tail end of the drainage tip (2532) is attached to the tail end of the flow transmission point (2534), and the flow transmission point (2534) is fixedly arranged on the upper surface of the fixing ring (2535);

the linkage frame (2531) comprises a linkage rod (25311), a return spring (25312), a bending prevention rod (25313) and a guide rod channel (25314), the inner side surface of the linkage rod (25311) is fixedly connected with two ends of the return spring (25312), and the bending prevention rod (25313) is embedded in the guide rod channel (25314);

the commutation device (258) comprises commutation fan blades (2581) and a telescopic spring (2582), the head ends of the commutation fan blades (2581) are fixedly connected with the side edge of the telescopic spring (2582), and the head ends of the telescopic spring (2582) are fixedly connected with the upper surface of the fixing plate (2510);

the commutating fan blades (2581) comprise a fan blade plate (25811) and a wind-dispelling hole (25812), wherein the wind-dispelling hole (25812) is arranged on the upper surface of the fan blade plate (25811) and is of an integrated structure.