CN110335782B

CN110335782B - Overcurrent protection relay

Info

Publication number: CN110335782B
Application number: CN201910682897.3A
Authority: CN
Inventors: 陆皖玉; 戚宝琴
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-26
Filing date: 2019-07-26
Publication date: 2021-02-09
Anticipated expiration: 2039-07-26
Also published as: CN110335782A

Abstract

The invention relates to the field of relays, in particular to an overcurrent protection relay which comprises a containing structure, a fixing plate, a filtering structure, a limiting structure, an on-off structure, a control structure, a resetting structure and a heat dissipation structure, wherein the containing structure is arranged on the fixing plate; the filter structure is abutted against the on-off structure, so that the filter structure is driven to shake through the on-off structure, the on-off condition of the on-off structure is intuitively reflected according to the deformation quantity of the filter structure, dust is effectively prevented from entering the interior of the containing box, the use stability is greatly improved, and when the push rod abuts against the filter screen, the filter screen is of a wave-shaped structure, so that the deformation quantity of the filter screen is larger while the dust filtering area is increased; the control structure is arranged in the on-off structure, so that the heat dissipation performance of the inside of the storage structure is improved, and meanwhile, the on-off structure is effectively prevented from being damaged by being impacted with the control structure, so that the stability is greatly improved.

Description

Overcurrent protection relay

Technical Field

The invention relates to the field of relays, in particular to an overcurrent protection relay.

Background

The overcurrent protection relay integrates protection, single-phase current measurement and control functions into a whole, realizes data sharing and remote control with a remote host through an in-com interface, realizes data sharing and remote control with the remote host through an in-con interface, realizes protection of elements through overcurrent protection action, generally divides the overcurrent protection into timing limit and inverse time limit overcurrent protection, current quick-break protection and single-phase grounding protection of a neutral point ungrounded system, and comprises a current relay, a time relay and a signal relay, wherein the current transformer and the current relay form a measuring element for judging whether the current passing through a line exceeds a standard, the time relay is a time delay element which ensures that the action of the device is selective with proper time delay, and the signal relay is used for sending a protection action signal, when the circuit breaker normally operates, the contacts of the current relay and the time relay are all disconnected, when a protected area has a fault or the current is overlarge, the current relay acts, the time relay is started through the contacts, after the preset time delay, the contacts of the time relay are closed, a tripping coil of the circuit breaker is connected, the circuit breaker trips, a fault line is cut off, the signal relay is started simultaneously, a signal board falls off, and light or sound signals are connected.

However, when traditional overcurrent protection relay applied to airtight distribution room, because the inside of the signal tablet on the overcurrent protection relay and body switches on, and then the dust enters into the inside of overcurrent relay easily, when coil current was too big, the coil generated heat and can lead to the inner line to burn out, inconvenient in time dispel the heat to relay inside, when working a telephone switchboard to multiunit circuit and use, when the condition of overflowing appeared in the inner circuit, can not very fast overhaul relay inside.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides an overcurrent protection relay, which can prevent an internal circuit from being burnt due to the heating of an internal coil, clear away dust, conveniently dissipate heat inside the relay in time during overcurrent and facilitate maintenance.

The technical scheme adopted by the invention for solving the technical problems is as follows: an overcurrent protection relay comprises a storage structure, a fixing plate, a filtering structure, a limiting structure, an on-off structure, a control structure, a reset structure and a heat dissipation structure; the on-off structure for controlling the on-off of the current is arranged in the containing structure, and the containing structure for containing the on-off structure is symmetrically provided with two fixing plates; the accommodating structure is provided with a heat dissipation structure for dissipating heat inside; the reset structure is clamped with the on-off structure; the control structure for attracting the on-off structure is arranged in the containing structure; the accommodating structure is provided with a plurality of limiting structures for fixing power lines, each on-off structure is electrically connected with two limiting structures, and each control structure is electrically connected with the other two limiting structures; it is used for dirt-proof to accomodate to be equipped with on the structure the filtration, just the break-make structure with contradict between the filtration.

Specifically, the containing structure comprises a containing box and a cover plate, wherein two fixing plates are symmetrically arranged at one end of the containing box and used for containing the on-off structure and the rectangular structure of the control structure, and the cover plate connected with a bolt is arranged at one end, deviating from the fixing plates, of the containing box.

Specifically, the filtering structure comprises a filtering net, a fixing sleeve, a push rod, a fixing shell, a limiting ring and a spring, the fixing sleeve with a rectangular structure is arranged on the cover plate, the wavy filtering net is clamped between the fixing sleeve and the cover plate, and the push rod abuts against the on-off structure; the cover plate positioned on the inner side of the filter screen is fixed with a fixed shell, a push rod is arranged in the fixed shell through a spring, a limit ring is arranged in the fixed shell, and one side of the limit ring abuts against the spring.

Specifically, limit structure includes spacing hole, baffle, briquetting and dog, two bisymmetry are equipped with the multiunit on the containing box the baffle, it has a plurality ofly to run through on the apron spacing hole, two bisymmetry in the inside of containing box is fixed with the multiunit the dog, the briquetting with bolted connection between the dog.

Specifically, the on-off structure comprises a movable connecting terminal, a fixed connecting terminal, a rubber interlayer, a movable iron core, a push block, a first reset spring, a containing frame, a static iron core and a pin shaft, wherein the containing frame is fixed inside the containing box, the static iron core with a cylindrical structure is arranged on the central axis of the containing frame, one end of the first reset spring is fixed on the containing frame, the other end of the first reset spring is abutted against the push block, the push block is fixed on the movable iron core, the movable iron core is rotatably connected with the containing frame through the pin shaft, the rubber interlayer is arranged at one end of the movable iron core, which is far away from the static iron core, the movable connecting terminal is fixed on the rubber interlayer, the movable connecting terminal is fixed between one of the press blocks and the stop block, and the movable connecting terminal is electrically connected with the stop block, the push rod props against the movable wiring terminal, the fixed wiring terminal is fixed at one end of the containing box, which is far away from the pin shaft, and the fixed wiring terminal is electrically connected with the other group of the stop blocks; the movable iron core is connected with a limiting block through a compression spring.

Specifically, the control structure comprises a coil, a fiber interlayer and an air ring, wherein the static iron core is provided with a latticed fiber interlayer with a spiral annular groove, the coil is spirally wound on the fiber interlayer, and the top end of the static iron core is provided with the wavy air ring.

Specifically, heat radiation structure includes suction disc, round pin axle, baffle and torsional spring, the baffle passes through to rotate between torsional spring and the containing box and is connected, just be equipped with hemispherical suction disc on the inside wall of baffle, just the torsional spring twines in the pivot.

Specifically, a reset structure is arranged inside the static iron core and comprises a pull rod, a spherical limiting ball is arranged at one end of the pull rod, and the limiting ball is clamped with a circular arc-shaped limiting block; and the pull rod is connected with the static iron core through a second return spring.

The invention has the beneficial effects that:

(1) according to the overcurrent protection relay, the filter structure is abutted against the on-off structure, so that the filter structure is driven to shake through the on-off structure, the on-off condition of the on-off structure is conveniently and visually reflected according to the deformation of the filter structure, dust is effectively prevented from entering the inside of the storage box, and the use stability is greatly improved, namely: the push rod is contradicted during the filter screen, the filter screen is the wave structure, makes when increasing dust filter area the deformation volume of filter screen is bigger, and then is convenient for pass through whether the filter screen is out of shape and judges the behavior of overflowing the relay, and then be convenient for overhaul when maintaining, manual promotion the filter screen makes the filter screen is contradicted the push rod, and then passes through the break-make of push rod control relay.

(2) According to the overcurrent protection relay, the control structure is arranged inside the on-off structure, so that the heat dissipation performance inside the containing structure is improved, meanwhile, the on-off structure and the control structure are effectively prevented from being damaged by collision, and the stability is greatly improved, namely: the balloon is the wave, makes in the balloon compression process the space grow of the inside of containing box, and then makes outside air current get into the inside of containing box, move binding post with decide binding post conflict, the balloon has avoided move binding post with decide binding post striking and cause the damage, when the coil outage, make the balloon resets, first reset spring shrink stimulates move the iron core and wind round pin axle rotates, makes move the iron core and reset, the balloon breathes in, and then has promoted the air flow, and then makes inside heat dispersion better, be equipped with latticed having spiral ring circular groove on the quiet iron core the fibre interlayer, the coil spiral twine in the fibre interlayer, and then improved the winding the air permeability between the coil, and then effectively prevent the coil high temperature damages.

(3) When the current is too high, the magnetic force generated by the coil under the action of the current is greater than the pulling force of the first reset spring, so that the movable iron core is clamped with the limiting ball, the on-off structure is disconnected with the stop block, the protection effect is achieved, the coil is powered off, at the moment, the elastic force between the plurality of compression springs is greater than the restoring force of the first reset spring, the on-off structure is clamped with the reset structure, at the moment, the magnetic force is lost when the coil is powered off, the heat dissipation structure is opened, the baffle of the structure springs outwards under the action of the torsion spring, the suction plate is driven to generate an outwards suction force at the moment when the baffle springs outwards open, the flowing of internal air flow can be accelerated, the heat dissipation of the coil is achieved, and meanwhile, a worker can be reminded of quickly finding a specific current protection relay to have a large-current open circuit problem when the closed power, timely maintenance avoids the need of one-by-one power-off detection in the installation of the overcurrent protection relay under the condition of containing a plurality of circuits.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic diagram of an overall structure of a preferred embodiment of an overcurrent protection relay according to the present invention;

FIG. 2 is a schematic view of a connection structure between the receiving structure and the filtering structure shown in FIG. 1;

FIG. 3 is a schematic diagram of the heat dissipation structure and the receiving structure shown in FIG. 2;

FIG. 4 is an enlarged view of portion A of FIG. 2;

FIG. 5 is an enlarged view of the portion B shown in FIG. 2;

FIG. 6 is a schematic view of the movable core shown in FIG. 3 engaging with a limiting ball;

fig. 7 is a schematic view of the installation of the torsion spring shown in fig. 2.

In the figure: 1. the storage structure comprises a storage structure body 11, a storage box 12, a cover plate, 2, a fixing plate, 3, a filtering structure, 31, a filter screen, 32, a fixing sleeve, 33, a push rod, 34, a fixing shell, 35, a limiting ring, 36, a spring, 4, a limiting structure, 41, a limiting hole, 42, a partition plate, 43, a pressing block, 44, a stop block, 5, an on-off structure, 51, a movable connecting terminal, 52, a fixed connecting terminal, 53, a rubber interlayer, 54, a movable iron core, 541, a limiting block, 542, a compression spring, 55, a pushing block, 56, a first reset spring, 57, a storage frame, 58, a static iron core, 59, a pin shaft, 6, a control structure, 61, a coil, 62, a fiber interlayer, 63, an air ring, 7, a heat dissipation structure, 71, a suction plate, 72, a rotating shaft, 73, a baffle plate, 74, a torsional spring, 8, a reset structure, 81, a limiting ball, 82.

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.

As shown in fig. 1 to 7, the overcurrent protection relay according to the present invention includes a storage structure 1, a fixing plate 2, a filtering structure 3, a limiting structure 4, an on-off structure 5, a control structure 6, a reset structure 8, and a heat dissipation structure 7; the on-off structure 5 for controlling the on-off of the current is arranged in the containing structure 1, and the containing structure 1 for containing the on-off structure 5 is symmetrically provided with two fixing plates 2; the accommodating structure 1 is provided with a heat dissipation structure 7 for dissipating heat inside; the reset structure 8 is clamped with the on-off structure 5; the control structure 6 for attracting the on-off structure 5 is arranged in the containing structure 1; the containing structure 1 is provided with a plurality of limiting structures 4 for fixing power lines, each on-off structure 5 is electrically connected with two limiting structures 4, and each control structure 6 is electrically connected with the other two limiting structures 4; it is used for dirt-proof to accomodate to be equipped with on the structure 1 filtration 3, just break-make structure 5 with contradict between the filtration 3.

Specifically, the containing structure 1 comprises a containing box 11 and a cover plate 12, wherein two fixing plates 2 are symmetrically arranged at one end of the containing box 11 and used for containing the on-off structure 5 and the rectangular structure of the control structure 6, the containing box 11 deviates from the end, away from the fixing plate 2, of the cover plate 12, the fixing plates 2 are arranged so that the containing box 11 can be installed on equipment through screws, the cover plate 12 is connected with the containing box 11 through bolts, and therefore the cover plate 12 is convenient to disassemble, and the on-off structure 5 and the control structure 6 in the containing box 11 are overhauled and maintained.

Specifically, the filtering structure 3 includes a filtering net 31, a fixing sleeve 32, a push rod 33, a fixing shell 34, a limiting ring 35 and a spring 36, the fixing sleeve 32 with a rectangular structure is arranged on the cover plate 12, the wavy filtering net 31 is clamped between the fixing sleeve 32 and the cover plate 12, and the push rod 33 abuts against the on-off structure 5; be located and be fixed with set casing 34 on the inboard apron 12 of filter screen 31, just push rod 33 is installed through spring 36 in the inside of set casing 34, just the inside of set casing 34 is equipped with spacing collar 35, just one side of spacing collar 35 is contradicted spring 36, and then is convenient for pass through the drive of break-make structure 5 the filter structure 3 shakes, and then is convenient for be based on the audio-visual reaction of the 3 deformation volume of filter structure the break-make condition of break-make structure 5 is simultaneously effectual to prevent that the dust from getting into the inside of containing box 11, and then improved the stability in utilization ability greatly, promptly: the push rod 33 is contradicted during the filter screen 31, the filter screen 31 is the wave structure, makes when increasing dust filter area the deformation volume of filter screen 31 is bigger, and then is convenient for pass through whether the filter screen 31 deforms and judges the behavior of overflowing relay, simultaneously when the filter screen 31 resets, the drive of being convenient for the push rod 33 is contradicted break-make structure 5, and then be convenient for when overhauing and maintaining, manual promotion the filter screen 31, and then make the filter screen 31 contradicts the push rod 33, and then pass through the break-make of push rod 33 control relay.

Specifically, the limiting structure 4 includes a limiting hole 41, a plurality of separating plates 42, a pressing block 43 and a plurality of stopping blocks 44, a plurality of groups of the separating plates 42 are symmetrically arranged on the containing box 11, a plurality of the limiting holes 41 penetrate through the cover plate 12, a plurality of groups of the stopping blocks 44 are symmetrically fixed inside the containing box 11, the pressing block 43 is connected with the stopping blocks 44 through bolts, when an external electric wire is connected, a power line firstly penetrates between the adjacent two separating plates 42 and between the pressing block 43 and the stopping blocks 44, then a screw in the limiting hole 41 is screwed through a screwdriver, the screw is rotatably connected with the limiting hole 41, the screw is in threaded connection with the pressing block 43, the pressing block 43 is abutted against the stopping blocks 44 to fix the power line, and the separating plates 42 are arranged, and then make the power cord distribute more normal, avoided the power cord to interweave, make the maintenance convenient and fast more.

Specifically, the on-off structure 5 includes a movable connection terminal 51, a fixed connection terminal 52, a rubber interlayer 53, a movable iron core 54, a push block 55, a first return spring 56, a storage frame 57, a stationary iron core 58 and a pin 59, the storage frame 57 is fixed inside the storage box 11, the stationary iron core 58 having a cylindrical structure is disposed on a central axis of the storage frame 57, one end of the first return spring 56 is fixed to the storage frame 57, the other end of the first return spring 56 abuts against the push block 55, the push block 55 is fixed to the movable iron core 54, the movable iron core 54 is rotatably connected to the storage frame 57 through the pin 59, the rubber interlayer 53 is disposed at one end of the movable iron core 54 away from the stationary iron core 58, the movable connection terminal 51 is fixed to the rubber interlayer 53, the movable connection terminal 51 is fixed between one of the press block 43 and the stopper 44, the movable wiring terminal 51 is electrically connected with the stopper 44, the push rod 33 abuts against the movable wiring terminal 51, the fixed wiring terminal 52 is fixed at one end of the containing box 11, which is far away from the pin shaft 59, and the fixed wiring terminal 52 is electrically connected with the other group of stoppers 44; the inside of the movable iron core 54 is connected with a limiting block 541 through a compression spring 542; the limiting block 541 is connected with the limiting ball 81 in a matched manner to realize clamping; the push rod 33 abuts against the movable connecting terminal 51, the fixed connecting terminal 52 is fixed at one end of the containing box 11, which is far away from the pin shaft 59, and the fixed connecting terminal 52 is electrically connected with the other group of the stoppers 44; move binding post 51 with it is equipped with to move between the iron core 54 rubber interlayer 53, and then improved move binding post 51 with move the insulating nature between the iron core 54, push rod 33 with move binding post 51 and contradict, and then improved move binding post 51's steadiness.

Specifically, control structure 6 includes coil 61, fibre interlayer 62 and gas ring 63, be equipped with latticed having spiral annular groove on quiet iron core 58 fibre interlayer 62, coil 61 spiral winding in fibre interlayer 62, the top of quiet iron core 58 is equipped with the wave gas ring 63, control structure 6 locates break-make structure 5's inside, and then improved the heat dispersion of the inside of accomodating structure 1 effectively prevents simultaneously break-make structure 5 with 6 striking damages of control structure, and then has improved stability performance greatly, and gas ring 63 is the elasticity gas ring to be equipped with venthole and inlet port on the gas ring 63, promptly: the coil 61 is electrified to generate magnetism, so that the movable iron core 54 impacts the air ring 63, the air ring 63 is wavy, the air ring 63 is compressed, the space inside the containing box 11 is enlarged, external air flow enters the containing box 11, then the movable wiring terminal 51 is abutted against the fixed wiring terminal 52, the air ring 63 avoids damage caused by impact of the movable wiring terminal 51 and the fixed wiring terminal 52, when the current is too high, the magnetic force generated by the coil 61 under the action of the current is greater than the pulling force of the first return spring 56, the movable iron core 54 is clamped with the limiting ball 81, the on-off structure 5 is disconnected with the stop block 44, the protection effect is achieved, the coil 61 is powered off, at the moment, the elastic force between the plurality of compression springs 542 is greater than the restoring force of the first return spring 56, and the on-off structure 5 is clamped with the return structure 8, at this time, the coil 61 is powered off and loses magnetic force, the heat dissipation structure 7 is opened, the baffle plate 73 of the structure 7 is sprung outwards under the action of the torsion spring 74, the suction plate 71 is driven to generate an outward suction force at the moment of springing outwards, the flow of internal air flow can be accelerated, the heat dissipation of the coil 61 is realized, meanwhile, the problem of large-current open circuit of a specific current protection relay can be quickly found by reminding workers when a plurality of overcurrent protection relays are arranged in a closed power distribution room for maintenance, the maintenance is timely carried out, the condition that the overcurrent protection relays are arranged under the condition of comprising a plurality of circuits and power failure detection needs to be carried out one by one is avoided, and then the air ring 63 is reset, the first reset spring 56 contracts to pull the movable iron core 54 to rotate around the pin shaft 59, so that the movable iron core 54 is reset, the air flow is promoted, and the heat dissipation performance of, the dust on the filter screen 31 is convenient to discharge, the static iron core 58 is provided with a grid-shaped fiber interlayer 62 with a spiral circular groove, the coil 61 is spirally wound on the fiber interlayer 62, the air permeability between the coils 61 is improved, and the high-temperature damage of the coils 61 is effectively prevented.

Specifically, the heat dissipation structure 7 includes a suction plate 71, a rotating shaft 72, a baffle 73 and a torsion spring 74, the baffle 73 is rotatably connected with the storage box 11 through the torsion spring 74, the hemispherical suction plate 71 is arranged on the inner side wall of the baffle 73, and the torsion spring 74 is wound on the rotating shaft 72; coil 61 outage loses magnetic force, heat radiation structure 7 opens, heat radiation structure 7's baffle 73 outwards pops open under torsional spring 74's effect, drive suction disc 71 and produce an outside suction in the twinkling of an eye outwards flicking, can accelerate the flow of inside air current, realize the heat dissipation to coil 61, and simultaneously, be favorable to reminding the staff when containing a plurality of overcurrent protection relay overhauls in joining in marriage the electrical room to the confined, can be very fast find concrete current protection relay the heavy current problem of opening circuit appear, in time maintain.

Specifically, a reset structure 8 is installed inside the stationary iron core 58, the reset structure 8 includes a pull rod 82, a spherical limiting ball 81 is installed at one end of the pull rod 82, and the limiting ball 81 is engaged with the arc-shaped limiting block 541; the pull rod 82 is connected with the stationary iron core 58 through a second return spring 83.

The working principle of the invention is as follows:

(1) when the power supply line connector normally works, an external electric wire is connected, firstly, the power supply line penetrates between the pressing block 43 and the stop block 44 from between two adjacent partition plates 42, then the screw in the limiting hole 41 is screwed by the screwdriver, the screw is rotatably connected with the limiting hole 41, the screw is in threaded connection with the pressing block 43, the pressing block 43 is abutted against the stop block 44 to fix the power supply line, the partition plates 42 are arranged, the power supply line distribution is more standard, the power supply line interweaving is avoided, and the maintenance is more convenient and faster; meanwhile, the insulation function between power lines can be achieved; a rubber interlayer 53 is arranged between the movable wiring terminal 51 and the movable iron core 54, so that the insulation between the movable wiring terminal 51 and the movable iron core 54 is improved, when the filter screen works normally, the interior of the movable wiring terminal 51 is electrically connected with the interior of the fixed wiring terminal 52 through the coil 61, one end of the push rod 33 is positioned in the filter screen 31, and the other end of the push rod abuts against the movable wiring terminal 51; the coil 61 is electrified, the electromagnetic relay works normally, at the moment, when the electromagnetic relay works normally, the coil 61 enables the static iron core 58 to generate magnetism, but in the normal working process, the magnetic force is smaller than the sum of the pulling force of the first reset spring 56 and the elastic force of the spring 36, and the magnetic force generated in the normal working process is larger than the torsion force of the torsion spring 74, so that the baffle plate 73 is absorbed on the accommodating box 11, when the electromagnetic relay works normally, the push rod 33 is abutted against the filter screen 31 to support the filter screen 31 out, the filter screen 31 is of a wave-shaped structure, the filter screen 31 is an elastic filter screen, the filter screen 31 is arranged between the fixed sleeve 32 and the cover plate 12 in a sliding manner, the wave-shaped filter screen 31 increases the dust filtering area, simultaneously, the deformation of the filter screen 31 is larger, when the relay works normally, the filter screen 31 protrudes outwards, when the relay is powered off, the filter screen 31 is recovered and does, when the maintenance is carried out, only the filter screen 31 needs to be manually pressed, so that the filter screen 31 abuts against the push rod 33, and the on-off of the relay is controlled through the push rod 33.

(2) When the current is too high, the coil 61 generates a large magnetic force under the condition of the too high current at the moment, the magnetic force at the moment is greater than the restoring force of the first return spring 56, the movable iron core 54 impacts the air ring 63, the air ring 63 is wavy, the movable iron core 54 can play a role in buffering in the impact process, meanwhile, in the instant of rapid movement, the air ring 63 is compressed, the space inside the containing box 11 is enlarged, external airflow enters the inside of the containing box 11, then the movable iron core 54 is adsorbed by the static iron core 58, the movable wiring terminal 51 is abutted against the fixed wiring terminal 52, the movable wiring terminal 51 is prevented from being damaged due to the impact with the fixed wiring terminal 52, and the movable wiring terminal 51 is contacted with the fixed wiring terminal 52; at the moment of adsorption, the fixed connecting terminal 52 is disconnected from the stop block 44, the coil 61 is powered off, the coil 61 loses magnetic force, and the on-off structure 5 is clamped and connected with the reset structure 8; at the moment of overhigh current, the magnetic force generated by the coil 61 under the action of the current is greater than the pulling force of the first return spring 56, so that the movable iron core 54 is clamped with the limiting ball 81, the on-off structure 5 is disconnected from the stop dog 44, thereby playing a role of protection, when the coil 61 is quickly adsorbed, the coil 61 is powered off, at the moment, the elastic force between the plurality of compression springs 542 is greater than the restoring force of the first return spring 56, so that the on-off structure 5 is clamped with the return structure 8, at the moment, the coil 61 is powered off and loses the magnetic force, the heat dissipation structure 7 is opened, the baffle 73 of the heat dissipation structure 7 is outwards bounced under the action of the torsion spring 74, the attraction plate 71 is driven to generate an outwards attraction force at the moment of outwards bounced opening, the flowing of internal air flow can be accelerated, the heat dissipation of the coil 61 is realized, and meanwhile, the problem of large-current open circuit of a specific current protection relay can be quickly found out, the current protection relay can be maintained in time, and the situation that power-off detection is needed one by one when the overcurrent protection relay is installed under the condition of containing a plurality of circuits is avoided; when the maintainer overhauls the completion of circuit, manual pulling pull rod 82, break away from between spacing ball 81 and the stopper 541, at this moment, first reset spring 56 contracts pulling force and is greater than the compression elasticity of spring 36, balloon 63 resets, first reset spring 56 contracts the pulling and moves iron core 54 and rotate around round pin 59, it resets to make iron core 54, and then the air current has been promoted, inside heat dissipation has been accelerated, be convenient for make the dust on the filter screen 31 discharge, be equipped with latticed fibre interlayer 62 that has spiral ring shape recess on quiet iron core 58, coil 61 spiral winding is in the inside of fibre interlayer 62, and then the air permeability between the winding coil 61 has been improved, and then effectively prevent coil 61 high temperature damage.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the embodiments and descriptions given above are only illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. An overcurrent protection relay, characterized in that: comprises a containing structure (1), a fixing plate (2), a filtering structure (3), a limiting structure (4), an on-off structure (5), a control structure (6), a reset structure (8) and a heat dissipation structure (7); the on-off structure (5) for controlling the on-off of current is arranged in the accommodating structure (1), and the accommodating structure (1) for accommodating the on-off structure (5) is symmetrically provided with two fixing plates (2); a heat dissipation structure (7) for dissipating heat inside is mounted on the accommodating structure (1); the reset structure (8) is clamped with the on-off structure (5); the control structure (6) used for attracting the on-off structure (5) is arranged in the containing structure (1); the containing structure (1) is provided with a plurality of limiting structures (4) for fixing power lines, each on-off structure (5) is electrically connected with two limiting structures (4), and each control structure (6) is electrically connected with the other two limiting structures (4); the dustproof filter structure (3) is arranged on the accommodating structure (1), and the on-off structure (5) is abutted against the filter structure (3);

the storage structure (1) comprises a storage box (11), the limiting structure (4) comprises a pressing block (43) and a stop block (44), the on-off structure (5) comprises a movable wiring terminal (51), a fixed wiring terminal (52), a rubber interlayer (53), a movable iron core (54), a push block (55), a first reset spring (56), a storage frame (57), a static iron core (58) and a pin shaft (59), the storage frame (57) is fixed inside the storage box (11), the static iron core (58) of a cylindrical structure is arranged on the central axis of the storage frame (57), one end of the first reset spring (56) is fixed on the storage frame (57), the other end of the first reset spring (56) is abutted against the push block (55), the push block (55) is fixed on the movable iron core (54), the movable iron core (54) is rotatably connected with the storage frame (57) through the pin shaft (59), the rubber interlayer (53) is arranged at one end, away from the static iron core (58), of the movable iron core (54), the movable wiring terminal (51) is fixed to the rubber interlayer (53), the movable wiring terminal (51) is fixed between one pressing block (43) and the stop block (44), the movable wiring terminal (51) is electrically connected with the stop block (44), the push rod (33) abuts against the movable wiring terminal (51), the fixed wiring terminal (52) is fixed to one end, away from the pin shaft (59), of the containing box (11), and the fixed wiring terminal (52) is electrically connected with the other group of stop blocks (44); the inner part of the movable iron core (54) is connected with a limiting block (541) through a compression spring (542).

2. An overcurrent protection relay according to claim 1, wherein: the storage structure (1) comprises a cover plate (12), wherein two fixing plates (2) are symmetrically arranged at one end of the storage box (11) and used for storing the on-off structure (5) and the rectangular structure of the control structure (6), and the cover plate (12) is connected with a bolt at one end of the storage box (11) deviating from the fixing plates (2).

3. An overcurrent protection relay according to claim 2, wherein: the filter structure (3) comprises a filter screen (31), a fixing sleeve (32), a push rod (33), a fixing shell (34), a limiting ring (35) and a spring (36), the fixing sleeve (32) with a rectangular structure is arranged on the cover plate (12), the wave-shaped filter screen (31) is clamped between the fixing sleeve (32) and the cover plate (12), and the push rod (33) abuts against the on-off structure (5); be located and be fixed with set casing (34) on filter screen (31) inboard apron (12), just push rod (33) are installed through spring (36) in the inside of set casing (34), just the inside of set casing (34) is equipped with spacing collar (35), just spring (36) are contradicted to one side of spacing collar (35).

4. An overcurrent protection relay according to claim 3, wherein: limiting structure (4) are including spacing hole (41) and baffle (42), two bisymmetry are equipped with the multiunit on containing box (11) baffle (42), it has a plurality ofly to run through on apron (12) spacing hole (41), the inside two bisymmetry of containing box (11) is fixed with the multiunit dog (44), briquetting (43) with bolted connection between dog (44).

5. An overcurrent protection relay according to claim 4, wherein: control structure (6) include coil (61), fibre interlayer (62) and gas ring (63), be equipped with latticed having spiral ring annular groove on quiet iron core (58) fibre interlayer (62), coil (61) spiral winding in fibre interlayer (62), the top of quiet iron core (58) is equipped with the wave gas ring (63).

6. An overcurrent protection relay according to claim 5, wherein: heat radiation structure (7) are including suction disc (71), pivot (72), baffle (73) and torsional spring (74), baffle (73) are connected through rotating between torsional spring (74) and containing box (11), just be equipped with hemispherical suction disc (71) on the inside wall of baffle (73), just torsional spring (74) twine on pivot (72).

7. The overcurrent protection relay according to claim 6, wherein: a reset structure (8) is arranged in the static iron core (58), the reset structure (8) comprises a pull rod (82), a spherical limiting ball (81) is arranged at one end of the pull rod (82), and the limiting ball (81) is clamped with a circular arc limiting block (541); the pull rod (82) is connected with the static iron core (58) through a second return spring (83).