CN212811238U

CN212811238U - 10kV distribution lines attaches protection device

Info

Publication number: CN212811238U
Application number: CN202021166218.1U
Authority: CN
Inventors: 刘君; 聂磊; 金佳星; 曹讯菲; 李志浩
Original assignee: Anshan Electric Power Survey & Design Institute
Current assignee: Liaoning Zhengxin Electric Power Design Co.,Ltd.
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2021-03-26
Anticipated expiration: 2030-06-22

Abstract

The utility model relates to a 10kV distribution line additional protection device, which comprises a base, one side of the upper surface of the base is fixedly connected with an electromagnet, the outer wall of the electromagnet is movably connected with an electromagnetic coil, the outer side of the electromagnet is fixedly provided with a shell, the 10kV distribution line additional protection device can completely attach the contact surfaces of a normally open contact and a normally open contact at the moment of contact between the normally open contact and the normally open contact by arranging the normally open contact and the first movable contact into inclined planes, the inclined plane inclination angle of the first movable contact is larger than that of the normally open contact, the normally open contact and the normally open contact are better attached, the contact area between the two contacts is increased, the resistance between the contact points is reduced, the heating between the contacts is reduced, the voltage stability requirement on the electromagnetic coil end is greatly reduced, and the contact surface of the inclined plane is far larger than that between the traditional semicircles and is generated by, increasing the service life of the device.

Description

10kV distribution lines attaches protection device

Technical Field

The utility model relates to an electromagnetic relay technical field specifically is a 10kV distribution lines attaches protection device.

Background

The 10kV distribution line is the most widely distributed part in an electric power system for reasonably distributing electric energy, but the load of the line changes at any time, an additional protection device is needed for detecting and controlling the line, the electromagnetic relay is one of the electromagnetic relay, one end of a relay control coil is connected with a power supply during use, the other end of the relay control coil is connected with the output end of a control component, and an output control signal of the control component is used for generating potential difference at the two ends of the relay control coil and forming a current loop so as to enable an electromagnet to generate magnetic force to attract an armature, so that the other end of a transverse rod connected with the armature is driven to move upwards, a push pin is driven to close the movable contact and a normally open contact, and an external circuit is controlled.

However, the existing electromagnetic relays always have some defects:

1. the pull-in voltage of the relay is only one half to one third of the rated working voltage of the relay generally, the conventional contacts are all round-head contacts, and the electromagnetic coil generates enough magnetic force to attract the armature through the rated working voltage, so that enough pressure between the contacts is provided, the contact area between the contacts is increased, the contact resistance between the contacts is reduced to reduce the heat generation between the contacts, and the stability requirement on the working voltage of the electromagnetic coil is high.

2. Because the structure demand of relay, the switching between the contact is to rely on solenoid to produce magnetic force and attract armature to drive the other end push pin and promote the contact of riveting on the phosphor copper piece in the twinkling of an eye and another contact closure, because this process time is extremely short, and phosphor copper piece has certain elasticity in addition, so can produce the phenomenon of shake, rebound in the contact of contact in the twinkling of an eye, this phenomenon can produce unnecessary interference to the control protection result of relay.

3. Because electromagnetic relay relies on solenoid circular telegram to produce magnetic force attraction armature and controls the state that opens and shuts of contact, but because solenoid's live time overlength, solenoid's resistance can increase certainly, and if let in the same electric current, the heating of coil increases certainly, can reduce the life of coil like this and burn out the coil even, if reduce the electric current can make the magnetic force that the coil produced not enough overcome the pulling force of spring, but when needing this electromagnetic relay to send the action again at the during operation, just can not realize electromagnetic relay's function this moment, only can stop work and overhaul or change, can influence the going on of work under some emergency.

SUMMERY OF THE UTILITY MODEL

The utility model provides a 10kV distribution lines additional protection device possesses long service life, contact resistance is little, the suitability is strong advantage, has solved the problem that proposes among the above-mentioned background art.

The utility model provides a following technical scheme: an additional protection device for a 10kV distribution line comprises a base, wherein an electromagnet is fixedly connected to one side of the upper surface of the base, an electromagnetic coil is movably connected to the outer wall of the electromagnet, a shell is fixedly mounted on the outer side of the electromagnet, a support column is fixedly mounted in the middle of the upper surface of the base, a rotating shaft is fixedly mounted on the upper portion of the support column, a cross rod is movably connected to the rotating shaft, an armature is fixedly mounted at one end of the cross rod, a holding rod located on one side of the armature is fixedly mounted on the upper surface of one end of the cross rod, a first connecting rod is fixedly mounted on the lower surface of the other end of the cross rod, a push pin is fixedly mounted at the bottom of one side of the first connecting rod, a second connecting rod located on one side of the first connecting rod is fixedly mounted at the bottom of the, one end of the supporting rod is fixedly arranged on one side of the supporting column, the rotating wheel is fixedly provided with a limiting block, the lower surface of the other end of the cross rod is fixedly provided with a spring, one end of the spring is fixedly connected with the other side of the upper surface of the base, the other side of the base is fixedly provided with a first phosphor copper sheet, the other side of the base is fixedly provided with a second phosphor copper sheet positioned on one side of the first phosphor copper sheet, the other side of the base is fixedly provided with a third phosphor copper sheet positioned on one side of the second phosphor copper sheet, the third phosphor copper sheet is provided with a slotted hole, the push pin passes through the slotted hole to be contacted with the second phosphor copper sheet, one side of the top of the first phosphor copper sheet is fixedly provided with a normally open contact, one side of the top of the second phosphor copper sheet is fixedly provided with a first movable contact, one end of the first movable contact is fixedly provided with a stop block, and a normally closed contact is fixedly arranged on one side of the top of the third phosphor copper sheet.

Preferably, the initial position of the axle pin at one end of the second connecting rod mounted on the rotating wheel is on the left side of the rotating wheel, and the initial position of the limiting block on the rotating wheel is on the right side of the stop block.

Preferably, the contact surface of the normally open contact and the first moving contact is arranged to be an inclined surface, and the inclination angle of the inclined surface of the first moving contact is larger than that of the normally open contact.

Preferably, the stopper is a cuboid and is respectively installed on the front side and the back side of the first movable contact, and the width of the stopper is greater than that of the limiting block.

Preferably, the material of the holding rod is insulating.

The utility model discloses possess following beneficial effect:

1. the additional protection device for the 10kV distribution line has the advantages that the normally open contact and the first movable contact are arranged into the inclined planes, compared with the prior art, the inclined planes can be completely attached to the contact surfaces of the first movable contact and the normally open contact at the moment of contact of the first movable contact and the normally open contact, the inclined plane inclination angle of the first movable contact is larger than that of the normally open contact, so that the angle of the first movable contact needing to be inclined to the normally open contact is just the same as that of the normally open contact, the normally open contact is better attached, the contact area between the two contacts is increased, the resistance between the contact points is reduced, the heat between the contacts is reduced, the electromagnetic force generated by the electromagnetic coil end is enough to enable the normally open contact and the voltage stability requirement of the electromagnetic coil end is greatly reduced, the contact surface of the inclined planes is far larger than that generated by pressure contact between traditional semicircles, increasing the service life of the device.

2. This 10kV distribution lines attaches protection device, through adding the stopper in traditional electromagnetic relay, thereby can make first movable contact drive stopper and first movable contact simultaneous movement because second connecting rod pulling runner rotates in the time of removing, and through having set up the dog on first movable contact, can guarantee first movable contact with normally open contact back, simultaneous movement's stopper can make the condition that first movable contact and normally open contact break away from because the resilience force that the instantaneous contact produced through the dog restriction, make the more stable of both contacts, can not produce the condition that the shake kick-backs, make the result of protection control more accurate.

3. This 10kV distribution lines additional protection device, through add an insulating holding rod in solenoid one end, can satisfy and lead to reducing through electric current wherein at solenoid after long-time the use because the resistance increase, thereby under the condition of the magnetic force of reduction electro-magnet, can realize the operation that needs electro-magnet actuation armature in the real work demand through manually pressing the holding rod, replace the mode that produces bigger magnetic force to coil increase current with such a mode, can reduce the unnecessary energy consumption on the one hand, on the other hand also avoids blind increase current to make the coil generate heat too big condition emergence that leads to burning out the coil, the life of improvement device and the ability of handling urgent demand.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged schematic view of the point A in the structure of FIG. 1 of the present invention;

FIG. 3 is an enlarged schematic view of the center of the structure of FIG. 1 of the present invention;

FIG. 4 is a schematic side view of a second phosphor-copper plate according to the present invention.

In the figure: 1. a base; 2. an electromagnet; 3. an electromagnetic coil; 4. a housing; 5. a support pillar; 6. a rotating shaft; 7. a cross bar; 8. an armature; 9. a holding rod; 10. a first link; 11. pushing the needle; 12. a second link; 13. A rotating wheel; 14. a support bar; 15. a limiting block; 16. a spring; 17. a first phosphor copper sheet; 18. a second phosphor copper sheet; 19. a third phosphor copper sheet; 20. a slot; 21. a normally open contact; 22. a first movable contact; 23. a stopper; 24. a second movable contact; 25. the contacts are normally closed.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, an additional protection device for a 10kV distribution line comprises a base 1, an electromagnet 2 fixedly connected to one side of the upper surface of the base 1, an electromagnetic coil 3 movably connected to the outer wall of the electromagnet 2, a housing 4 fixedly installed on the outer side of the electromagnet 2, a support pillar 5 fixedly installed in the middle of the upper surface of the base 1, a rotating shaft 6 fixedly installed on the upper portion of the support pillar 5, a cross rod 7 movably connected to the rotating shaft 6, an armature 8 fixedly installed on one end of the cross rod 7, a holding rod 9 fixedly installed on one side of the armature 8 on the upper surface of one end of the cross rod 7, a first connecting rod 10 fixedly installed on the lower surface of the other end of the cross rod 7, a push pin 11 fixedly installed on the bottom of one side of the first connecting rod 10, a second connecting rod 12 fixedly installed on one side of the first connecting rod 10 on, a supporting rod 14 is movably connected with a rotating wheel 13 through a bearing, one end of the supporting rod 14 is fixedly arranged on one side of a supporting column 5, a limiting block 15 is fixedly arranged on the rotating wheel 13, a spring 16 is fixedly arranged on the lower surface of the other end of a cross rod 7, one end of the spring 16 is fixedly connected with the other side of the upper surface of a base 1, a first phosphor copper sheet 17 is fixedly arranged on the other side of the base 1, a second phosphor copper sheet 18 positioned on one side of the first phosphor copper sheet 17 is fixedly arranged on the other side of the base 1, a third phosphor copper sheet 19 positioned on one side of the second phosphor copper sheet 18 is fixedly arranged on the other side of the base 1, a slotted hole 20 is formed in the third phosphor copper sheet 19, a push pin 11 passes through the slotted hole 20 to be in contact with the second phosphor copper sheet 18, a normally open contact 21 is fixedly arranged on one side of the top of the first phosphor copper sheet, the other side of the top of the second phosphor copper sheet 18 is fixedly provided with a second moving contact 24, and one side of the top of the third phosphor copper sheet 19 is fixedly provided with a normally closed contact 25.

As shown in fig. 1 and 2, the initial position of the shaft pin at one end of the second connecting rod 12 mounted on the rotating wheel 13 is on the left side of the rotating wheel 13, the initial position of the limiting block 15 on the rotating wheel 13 is on the right side of the stop block 23, when the armature 8 at one end of the cross rod 7 is attracted by the electromagnet 2 to move downward, the other end of the cross rod 7 moves upward, so that the first connecting rod 10 drives the push pin 11 to push the upper half portion of the second phosphor copper sheet 18 to move to the upper half portion of the first phosphor copper sheet 17, meanwhile, the second connecting rod 12 pulls the rotating wheel 13 to rotate clockwise due to the upward movement of the other end of the cross rod 7, the rotating wheel 13 drives the limiting block 15 thereon to rotate and always attach to the stop block 23, the stop block 23 is ensured to be in stable closed contact with the normally open contact 21.

As shown in fig. 2 and 4, the contact surfaces of the normally open contact 21 and the first movable contact 22 are provided as inclined surfaces, the inclined surface can ensure that two contacts have larger contact surface when in contact, and the inclined angle of the inclined surface of the first movable contact 22 is larger than that of the normally open contact 21, since the first movable contact 22 needs to move toward the normally open contact 21 to be engaged with the normally open contact 21, during the process, the first movable contact 22 rotates at a certain angle, so that the angle of the first movable contact 22 is larger than that of the normally open contact 21, the inclination angle of the normally open contact 21 is the same when the first movable contact 22 moves to the normally open contact 21, thereby further ensuring the stable contact between the two contacts, reducing the contact resistance of the two contacts, therefore, heat generated between the two contacts due to instant electrification is reduced, the normal work of the electromagnetic relay is ensured, and the service life of the device is prolonged.

As shown in fig. 1, 2 and 4, the stopper 23 is a rectangular parallelepiped and is respectively installed on the front and back of the first movable contact 22, and the width of the stopper is greater than the width of the stopper 15, the stopper 15 can be ensured to always limit the moving position of the first movable contact 22 by the stopper 23, when the first movable contact 22 moves to a specific position, the stopper 23 can ensure that the first movable contact 22 does not shake or jump back the second phosphor copper sheet 18 due to the instant closing action, and the accuracy of the monitoring protection result is further ensured.

As shown in fig. 1, the material of holding rod 9 is insulating, after electromagnetic relay live time overlength, solenoid 3's resistance can increase ageing unavoidably, thereby influence its size that passes through the electric current, when solenoid 3 well current transformation hour, will make solenoid 3 produce magnetic force diminish, thereby can not produce sufficient suction to armature 8, electromagnetic relay just can not normally work like this, can guarantee through holding rod 9 can be interim under this condition accomplish electromagnetic relay's function through artifical manual, thereby it can guarantee to continue to work under the condition of emergency demand under the condition that electromagnetic relay itself loses the function to deal with.

The working principle of the embodiment is as follows:

when the electromagnetic coil works, current is conducted in the electromagnetic coil 3, so that the electromagnet 2 is magnetized, the armature 8 is attracted to move towards the electromagnet 2, one end of the transverse rod 7 moves downwards, the transverse rod 7 rotates on the rotating shaft 6, the other end of the transverse rod 7 rotates upwards, the first connecting rod 10 is driven to rotate upwards through the rotation of the transverse rod 7, the push pin 11 is enabled to displace in the horizontal direction, the upper part of the second phosphor copper sheet 18 is pushed to move leftwards, meanwhile, the second connecting rod 12 pulls the rotating wheel 13 to rotate through the shaft pin under the rotating action of the transverse rod 7, so that the limiting block 15 rotates on the rotating wheel 13, the limiting block 15 has leftward displacement in the horizontal direction and is always attached to the stop block 23, after the first movable contact 22 is attached to the normally open contact 21, the limiting block 15 limits the position of the first movable contact 22 through the stop block 23, when the magnetic force of the electromagnetic coil 3 is, this is done by manually pressing the grip 9.

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. The utility model provides a 10kV distribution lines additional protection device, includes base (1), its characterized in that: the electromagnetic switch is characterized in that an electromagnet (2) is fixedly connected to one side of the upper surface of the base (1), an electromagnetic coil (3) is movably connected to the outer wall of the electromagnet (2), a shell (4) is fixedly mounted on the outer side of the electromagnet (2), a support column (5) is fixedly mounted in the middle of the upper surface of the base (1), a rotating shaft (6) is fixedly mounted on the upper portion of the support column (5), a cross rod (7) is movably connected to the rotating shaft (6), an armature (8) is fixedly mounted at one end of the cross rod (7), a holding rod (9) located on one side of the armature (8) is fixedly mounted on the upper surface of one end of the cross rod (7), a first connecting rod (10) is fixedly mounted on the lower surface of the other end of the cross rod (7), a push pin (11) is fixedly mounted at the bottom of one side of the first connecting rod (10), a second connecting rod, one end of the second connecting rod (12) is movably connected with a rotating wheel (13) through a shaft pin, the rotating wheel (13) is movably connected with a supporting rod (14) through a bearing, one end of the supporting rod (14) is fixedly arranged on one side of the supporting column (5), a limiting block (15) is fixedly arranged on the rotating wheel (13), a spring (16) is fixedly arranged on the lower surface of the other end of the cross rod (7), one end of the spring (16) is fixedly connected with the other side of the upper surface of the base (1), a first phosphor copper sheet (17) is fixedly arranged on the other side of the base (1), a second phosphor copper sheet (18) positioned on one side of the first phosphor copper sheet (17) is fixedly arranged on the other side of the base (1), a third phosphor copper sheet (19) positioned on one side of the second phosphor copper sheet (18) is fixedly arranged on the other side of the base (1), and a slotted hole, the push pin (11) penetrates through the slotted hole (20) to be in contact with the second phosphor copper sheet (18), a normally open contact (21) is fixedly mounted on one side of the top of the first phosphor copper sheet (17), a first movable contact (22) is fixedly mounted on one side of the top of the second phosphor copper sheet (18), a stop block (23) is fixedly mounted at one end of the first movable contact (22), a second movable contact (24) is fixedly mounted on the other side of the top of the second phosphor copper sheet (18), and a normally closed contact (25) is fixedly mounted on one side of the top of the third phosphor copper sheet (19).

2. The 10kV distribution line additional protection device of claim 1, wherein: the initial position of the shaft pin at one end of the second connecting rod (12) mounted on the rotating wheel (13) is on the left side of the rotating wheel (13), and the initial position of the limiting block (15) on the rotating wheel (13) is on the right side of the stop block (23).

3. The 10kV distribution line additional protection device of claim 1, wherein: the contact surface of the normally open contact (21) and the first movable contact (22) is set to be an inclined surface, and the inclination angle of the inclined surface of the first movable contact (22) is larger than that of the normally open contact (21).

4. The 10kV distribution line additional protection device of claim 1, wherein: the stop blocks (23) are cuboids and are respectively arranged on the front surface and the back surface of the first movable contact (22), and the width of the stop blocks is larger than that of the limiting blocks (15).

5. The 10kV distribution line additional protection device of claim 1, wherein: the holding rod (9) is made of insulating materials.