CN111863555B

CN111863555B - Adjustable air switch's tripping operation structure

Info

Publication number: CN111863555B
Application number: CN202010681420.6A
Authority: CN
Inventors: 陈垠杰
Original assignee: State Grid Zhejiang Electric Power Co Ltd Zhuji Power Supply Co; Zhuji Dongbai Electric Power Installation Engineering Co ltd
Current assignee: State Grid Zhejiang Electric Power Co Ltd Zhuji Power Supply Co; Zhuji Dongbai Electric Power Installation Engineering Co ltd
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2022-11-25
Anticipated expiration: 2040-07-15
Also published as: CN111863555A

Abstract

The invention relates to the technical field of electrical equipment and discloses an adjustable tripping structure of an air switch. This adjustable air switch's tripping operation structure, the opening size of utilizing the position change positioning clip of slider, and then realize the joint with the hasp, secondly, the magnetic force that has utilized the electro-magnet exerts decurrent power to the slider, make the slider can upwards perk, because the atress of slider is downward, as long as the locating piece does not grind the flat completely, just can not take place to trip, the reliability and the life of air switch have been improved, in addition, the electromagnetic force of electro-magnet is different to lead to the extension length of spring under the steady state different, at excitation coil ageing, when magnetic force descends, ejector pin height becomes high under the steady state, the position air switch that only needs to adjust armature this moment can normal use again.

Description

Adjustable tripping structure of air switch

Technical Field

The invention relates to the technical field of electrical equipment, in particular to an adjustable tripping structure of an air switch.

Background

An air switch is a common circuit breaker, integrates control and multiple protection functions, and is internally provided with an electromagnetic release, a bimetallic strip and an under-voltage release as shown in fig. 6, when a circuit is broken, overloaded or under-voltage, the release triggers a lever to jack up a hook, and a lock chain is separated from the hook under the action of a spring to drive a knife switch to open and cut off the power.

In order to improve the sensitivity and reliability of the air switch in power failure, the hook and the chain are inclined planes which are easy to unhook, clamping is achieved through friction force between the inclined planes, the lever moves slightly to jack the hook, the friction force reduces unhooking, tripping is achieved, after the air switch is used for a long time, abrasion between the hook and the chain is large, the air switch is difficult to switch on, and the service life of the air switch is shortened.

Secondly, when the voltage of the undervoltage release is normal, the magnetic force of the electromagnet is large to attract the armature, and when the voltage is undervoltage, the magnetic force of the electromagnet is reduced and is smaller than the tensile force of the spring to enable the armature to be released to drive the lever to enable the air switch to be tripped, but after the undervoltage release is used for a long time, along with the fact that an insulating layer of the magnet exciting coil is broken down, the number of turns of the magnet exciting coil is reduced, the magnetic force is reduced, and under normal voltage, the state of attracting the armature is difficult to maintain, so that after the air switch is switched on, slight voltage fluctuation can also cause tripping, and the undervoltage release cannot be used normally.

Disclosure of Invention

In view of the above-mentioned shortcomings of the background art, the present invention provides a technical solution for an adjustable trip structure of an air switch, which has the advantages of long service life and adjustable under-voltage state, and solves the problems of the background art.

The invention provides the following technical scheme: the utility model provides an adjustable air switch's tripping operation structure, includes the plug-in strip, plug-in strip fixedly connected with chain, the one end of chain is connected with the hasp of arrow point shape, one side of hasp is equipped with the locating clip, two link arms of locating clip all are connected with the connecting rod, two the connecting rod articulates there is same slider, the lateral shifting of slider can drive opening and shutting of connecting rod, but slider longitudinal movement, slider swing joint has the horizontal spacing groove that sets up, be equipped with the locating piece that the restriction slider further removed on the spacing groove, the opening and the locating piece and the slider contact of locating clip are crossed to the widest position that hasp, locating piece and slider after the position relation satisfies the combined floodgate, the bottom of slider is equipped with position adjustable location armature, the spacing groove is run through completely corresponding to the bottom of the gliding position of slider, location armature has the electro-magnet through spring coupling, the top of electro-magnet is equipped with the ejector pin, the slider when the rebound of ejector pin can jack-up combined floodgate state, the bottom of slider is equipped with armature, the electro-magnet is connected with the lever.

Preferably, the back side of the hook is an inclined plane, and an inclined plane parallel to the hook is arranged at the opening and closing position of the positioning clamp.

Preferably, the sliding block is in a step shape, and the positioning block is a step surface arranged at the bottom of the sliding groove.

Preferably, the end face of the sliding block matched with the positioning block is a cylindrical surface, the axis of the cylindrical surface is lower than the highest point of the positioning block, the top end of the ejector rod is in a wedge shape, and the lowest point of the wedge shape is lower than the axis of the positioning block.

Preferably, the bottom of the positioning armature is provided with a water bag, and one side of the water bag is connected with a screw with adjustable depth.

The invention has the following beneficial effects:

1. according to the tripping structure of the adjustable air switch, the opening size of the positioning clamp is changed by utilizing the position change of the sliding block, so that the clamping connection with the hook is realized, on one hand, the pulling force of a tripping spring is reduced by utilizing the lever principle, the constraint is realized by utilizing the symmetry, the maintenance of a closing state can be ensured by utilizing smaller clamping force, and meanwhile, the tripping sensitivity is not influenced, on the other hand, the downward force is exerted on the sliding block by utilizing the magnetic force of the electromagnet, so that the sliding block cannot be tilted upwards, and as the stress of the sliding block is downward, the tripping cannot occur as long as the positioning block is not completely ground, so that the reliability of the air switch is improved, and the service life of the air switch is prolonged.

2. This adjustable air switch's tripping operation structure, the electromagnetic force of electro-magnet is different to lead to the extension length of spring different under the stable condition, compares prior art and only attracts and can not hold two states, and the state of spring extension length is continuous, and is ageing at excitation coil, and when magnetic force descends, the ejector pin height became high under the stable condition, only need adjust the position of armature this moment, makes its and the electromagnetic force adaptation that descends, but air switch normal use again.

Drawings

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

FIG. 2 is a front view of the present invention;

FIG. 3 is a schematic structural diagram of the invention after closing;

FIG. 4 is a schematic structural diagram of the present invention during closing;

FIG. 5 is an enlarged view of A in FIG. 2 according to the present invention;

FIG. 6 is a schematic view of the positioning armature and water bladder of the present invention;

fig. 7 is a schematic diagram of a conventional air switch.

In the figure: 1. a knife switch; 2. a chain; 3. hooking; 4. positioning clips; 5. a connecting rod; 6. a slider; 7. a limiting groove; 8. positioning a block; 9. jacking up the groove; 10. an electromagnet; 11. a top rod; 12. a lever; 13. positioning the armature; 14. a water bag.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, an adjustable tripping structure of an air switch comprises a switch blade 1, the switch blade 1 is fixedly connected with a chain 2, the chain 2 is connected with a spring, one end of the chain 2 is connected with an arrow-shaped hook 3, one side of the hook 3 is provided with a positioning clamp 4, the positioning clamp 4 is hinged with a shell of the air switch, two connecting arms of the positioning clamp 4 are both connected with a connecting rod 5, the two connecting rods 5 are hinged with a same sliding block 6, the transverse movement of the sliding block 6 can drive the connecting rod 5 to open and close, the sliding block 6 moves to the direction of the hook 3 to open and close a large opening, the sliding block 6 moves to the other side to close an opening, the sliding block 6 can move longitudinally, the small-amplitude longitudinal movement of the sliding block 6 can be realized by the small-amplitude longitudinal rotation of the connecting rod 5 or the sliding block 6 is hinged with a connecting shaft, the sliding block 6 is movably connected with a transversely arranged limiting groove 7, the limiting groove 7 is fixed in the shell of the air switch, a positioning block 8 for limiting the slide block 6 to move further is arranged on the limiting groove 7, namely the opening of the positioning clamp 4 is limited, the position relation of the hook 3, the positioning block 8 and the slide block 6 meets the condition that the widest position of the hook 3 crosses the opening of the positioning clamp 4 after closing and the positioning block 8 is contacted with the slide block 6, the bottom of the slide block 6 is provided with a positioning armature 13 with adjustable position, the limiting groove 7 is provided with a jacking groove 9 corresponding to the sliding position of the slide block 6, the positioning armature 13 is connected with an electromagnet 10 through a spring, the top of the electromagnet 10 is provided with a mandril 11, the slide block 6 in closing state can be jacked up by the upward movement of the mandril 11, the bottom of the slide block 6 is provided with an armature, the electromagnet 10 maintains suction force in power-on state to enable the spring to be in a compressed state, when the voltage is reduced, the spring extends to jack the slide block 6 to be tripped, the electromagnet 10 is connected with a lever 12, and the lever 12 is connected with a short-circuit tripping device and an overload tripping device, the lever 12 drives the electromagnet 10 and the ejector rod 11 to move, and then the hook 3 is released to realize tripping.

Referring to fig. 3, the back side of the hook 3 is an inclined plane, the opening and closing portion of the positioning clip 4 is provided with an inclined plane parallel to the hook 3, and the end of the opening and closing portion is provided with a column, when the switch is closed, the limiting groove 7 is drilled into the opening and closing portion of the positioning clip 4, the column can better slide along the inclined plane, and when the switch is tripped, the back inclined plane is provided to ensure the reliability of the trip.

Referring to fig. 4, the sliding block 6 is stepped, so that the matching width is reduced to make the sliding block easy to be disengaged, and the width is wide enough to make the matching state not easy to change, the bottom of the sliding block is provided with a limiting structure to prevent the sliding block from sliding out of the limiting groove 7, so that the sliding block 6 slides in the sliding groove all the time without being disengaged, the positioning block 8 is a stepped surface arranged at the bottom of the sliding groove, and the step prevents the sliding block 6 from further sliding, i.e., prevents the opening of the positioning clamp 4 from increasing, and further prevents the hook 3 from retracting.

Referring to fig. 5, an end surface of the slider 6, which is matched with the positioning block 8, is a cylindrical surface, an axis of the cylindrical surface is lower than a highest point of the positioning block 8, a top end of the ejector rod 11 is provided with a wedge shape, and a lowest point of the wedge shape is not higher than an axis of the positioning block 8, so that the ejector rod 11 is prevented from blocking normal sliding of the slider 6.

Referring to fig. 6, a water bag 14 is disposed at the bottom of the positioning armature 13, a screw with adjustable depth is connected to one side of the water bag 14, the bottom of the screw is connected to a flat plate, and the water bag 14 is extruded by adjusting the depth of the screw to deform, so as to adjust the position of the water bag 14.

The working principle and the working process of the invention are as follows:

when the circuit is under-voltage, the magnetic force of electro-magnet 10 reduces, the spring extension of bottom, ejector pin 11 jack-up slider 6, the pulling force of chain 2 transmits to locating clip 4 through hasp 3 on, and then crosses locating piece 8 through connecting rod 5 drive slider 6, locating clip 4 further opens one's mouth, hasp 3 breaks away from and accomplishes the tripping operation, electromagnetic trip ware and bimetallic strip can trigger lever 12 and remove when the circuit short circuit is transshipped, then drive electro-magnet 10 and remove, realize the tripping operation.

During closing, the lock chain 2 and the hook 3 move, the hook 3 drills into the positioning clamp 4, the opening of the positioning clamp is gradually enlarged, the sliding block 6 is driven to slide, the electromagnet 10 is not electrified at the moment, the ejector rod 11 is located at the highest position, the sliding block 6 cannot be clamped, when the widest position reaches the closing position, the electromagnet is electrified at the moment, the ejector rod 11 retracts, the sliding block 6 returns to the position of the positioning block 8 and is mutually matched and clamped with the positioning block 8, the reverse opening of the positioning clamp 4 is limited, the position of the hook 3 is further limited, and closing is completed.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An adjustable air switch's trip structure, includes plug blade (1), plug blade (1) fixedly connected with chain (2), its characterized in that: the one end of chain (2) is connected with hasp (3) of arrow point shape, one side of hasp (3) is equipped with positioning clamp (4), two link arms of positioning clamp (4) all are connected with connecting rod (5), two connecting rod (5) articulate there is same slider (6), the lateral shifting of slider (6) can drive opening and shutting of connecting rod (5), connecting rod (5) can rotate by a small margin, but slider (6) longitudinal movement, slider (6) swing joint has horizontal spacing groove (7) that sets up, be equipped with locating piece (8) that restriction slider (6) further moved on spacing groove (7), the position relation of hasp (3), locating piece (8) and slider (6) satisfies behind the combined floodgate opening and locating piece (8) and slider (6) contact of opening and locating piece (4) of hasp (4) cross, the bottom of slider (6) is equipped with position adjustable position location armature (13), spacing groove (7) are corresponding to slider (6) gliding bottom run through completely armature (10) the top of location electromagnet (10), during the ejector pin (11) can be equipped with the electro-magnet (11) of closing spring (10) top, the electro-magnet (11) that upwards move, the bottom of the sliding block (6) is provided with an armature, and the electromagnet (10) is connected with the lever (12).

2. The trip structure of an adjustable air switch of claim 1, wherein: the back side of the hook (3) is an inclined plane, and an inclined plane parallel to the hook (3) is arranged at the opening and closing position of the positioning clamp (4).

3. The trip structure of an adjustable air switch of claim 1, wherein: the slider (6) is stepped, and the locating piece (8) is the ladder surface of locating the spout bottom.

4. The trip structure of an adjustable air switch of claim 1, wherein: the end face of the sliding block (6) matched with the positioning block (8) is a cylindrical surface, the axis of the cylindrical surface is lower than the highest point of the positioning block (8), the top end of the ejector rod (11) is in a wedge shape, and the lowest point of the wedge shape is lower than the axis of the positioning block (8).

5. The trip structure of an adjustable air switch of claim 1, wherein: the bottom of the positioning armature (13) is provided with a water bag (14), and one side of the water bag (14) is connected with a screw with adjustable depth.