CN113517159B

CN113517159B - Electric protection device of direct current distributed energy wisdom lighting circuit

Info

Publication number: CN113517159B
Application number: CN202110396270.9A
Authority: CN
Inventors: 孙少杰; 王冠旻; 周鹏林; 林兆乐; 邵华波; 路全忠
Original assignee: Huaneng Qingdao Thermal Power Co Ltd
Current assignee: Huaneng Qingdao Thermal Power Co Ltd
Priority date: 2021-04-13
Filing date: 2021-04-13
Publication date: 2022-04-01
Anticipated expiration: 2041-04-13
Also published as: CN113517159A

Abstract

The invention relates to the technical field of electrical equipment and discloses an electrical protection device for a direct-current distributed energy intelligent lighting circuit. This direct current distributed energy wisdom lighting circuit electrical protection device, insert separately stationary contact and movable contact through the quick of insulating piece, then realize the break-make between control stationary contact and the movable contact, because control current only acts on in the twinkling of an eye of drive, consequently when equipment breaks down and leads to control current unstability, also can guarantee the normal operating of relay, improve the reliability of its operation, secondly, the distance of stationary contact and movable contact is nearer, separate more rapidly with the contact, the formation time of electric arc is shorter, the destructive power of electric arc has further been reduced, on the other hand, the separation of stationary contact and movable contact can be ensured in the insertion of insulating piece, stop the emergence of adhesion completely.

Description

Electric protection device of direct current distributed energy wisdom lighting circuit

Technical Field

The invention relates to the technical field of electrical equipment, in particular to an electrical protection device of a direct-current distributed energy intelligent lighting circuit.

Background

Distributed energy is an energy supply mode built at a user side, namely a small-scale, small-capacity and modular energy system is installed at a dispersed user side, and the distributed energy system comprises multiple forms of solar energy utilization, wind energy utilization, fuel cell and gas cooling, heat and electricity triple supply and the like.

The direct-current distributed energy intelligent lighting circuit obtains basic data and dynamic data of distributed energy and lighting equipment through the internet of things sensing layer, and intelligent control such as monitoring, control and scheduling is carried out on the application layer, so that resource utilization maximization is achieved.

The fluorescent lamp is a common lighting device, and at the moment of starting the fluorescent lamp, gas needs to be punctured to enable the gas to conduct electricity and generate glow, so that the power at the moment of starting the fluorescent lamp is larger, and in an intelligent lighting circuit, the fluorescent lamp needs to be controlled and grouped according to actual conditions, so that the fluorescent lamp is started and stopped more frequently, in a distributed energy source, an inverter needs to be used for converting direct current provided by optical energy and battery energy storage into alternating current, the power of the inverter is limited greatly, and the inverter is easily damaged when the power of the inverter is too large, so that the inverter is usually provided with an overload and overcurrent prevention device, and a relay is not only a common control device in the circuit, but also an important component of most protection devices.

The relay generally includes a moving contact and a stationary contact, and an operating current drives the stationary contact to move so as to close or open the stationary contact, and generally, when no current is supplied, the relay is called a normally closed contact relay, and when the relay is opened, the relay is called a normally open contact relay.

Secondly, when the relay is opened and closed, arc discharge can be generated in the process that the static contact and the movable contact are far away from and close to each other, fusion welding ablation of the contacts can be caused, the phenomena of adhesion, insecurity, poor contact, over-quick abrasion and the like of contact pairs can occur, and the service life of the relay is shortened.

Disclosure of Invention

Aiming at the defects of the background technology, the invention provides the technical scheme of the electric protection device of the DC distributed energy intelligent lighting circuit, which has the advantages of energy conservation, high reliability, long service life and the like and solves the problems in the background technology.

The invention provides the following technical scheme: an electric protection device of a DC distributed energy intelligent lighting circuit comprises a shell, a fixed contact, a movable contact and a compression spring, the static contact is fixedly connected with the shell, the movable contact is movably connected with the shell through a compression spring, the device also comprises an insulating sheet, the insulating sheet can be inserted between the static contact and the moving contact to break the communication between the static contact and the moving contact, one side of the static contact and one side of the moving contact are provided with guide plates, the insulating sheet is movably connected with two inclined driving rods through driven rods, the two inclined driving rods form a herringbone shape, connecting shafts of the two inclined driving rods are connected with armatures, the one end of armature is connected with the extension spring that resets of pretension, the other end of armature is equipped with the electro-magnet, two the oblique actuating lever drives the insulating piece under the suction effect of electro-magnet and makes the insulating piece insert between stationary contact and the movable contact, two the oblique actuating lever gets back to the normal position under the effect of extension spring that resets.

Preferably, the tilt driving rod is movably connected with a manual control rod, the manual control rod penetrates through the side wall of the shell, and an inclined connecting groove is formed between the manual control rod and the tilt driving rod.

Preferably, the driven rod comprises an outer tube and an inner movable rod, a limiting block is arranged at the end part of the inner movable rod, a movable blocking block with a locking structure is arranged on one side, close to the inner, of a connecting cavity of the outer tube and the inner movable rod, a pressing block is arranged on one side, close to the outer, of the limiting block, and the locking structure is alternately locked and released when being pressed.

Preferably, the electromagnet is electrically connected with a capacitor, the controller controls the action current to charge the capacitor, a buffer unit is connected in series between the capacitor and the electromagnet, the controller controls the voltage at two ends of the buffer unit, when the buffer unit applies the voltage of the action current, the buffer unit is connected, and when the buffer unit does not apply the voltage of the action current, the buffer unit disconnects the connection between the capacitor and the electromagnet.

The invention has the following beneficial effects:

1. this direct current distributed energy wisdom lighting circuit electrical protection device, insert separately stationary contact and movable contact through the quick of insulating piece, then realize the break-make between control stationary contact and the movable contact, its on-state and off state do not all need extra electric power to maintain, reduce the energy consumption of equipment, secondly, because control current only acts on in a twinkling of an eye of driven, consequently when equipment breaks down and leads to control current unstability, also can guarantee the normal operating of relay, improve the reliability of its operation.

2. This direct current distributed energy wisdom lighting circuit electrical protection device, quick insertion through the insulating piece separates stationary contact and movable contact, the air of comparing, the insulating piece is difficult to be punctured and forms electric arc, secondly, the distance of stationary contact and movable contact is nearer, separate more rapidly with the contact, the formation time of electric arc is shorter, the destructive power of electric arc has further been reduced, on the other hand, the separation of stationary contact and movable contact can be guaranteed in the insertion of insulating piece, stop the emergence of adhesion completely, the injury of some electric arc also can be absorbed to the insulating piece simultaneously, further improve contact fusion welding's life.

Drawings

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

FIG. 2 is a schematic view of the construction of the follower link according to the present invention;

FIG. 3 is a schematic structural view of a movable block according to the present invention;

fig. 4 is a schematic diagram of a control structure of the present invention.

In the figure: 1. a housing; 2. a stationary contact; 3. a movable contact; 4. a compression spring; 5. a guide plate; 6. an insulating sheet; 7. a driven lever; 71. an outer tube; 72. an inner movable rod; 73. a limiting block; 74. a pressing block; 75. a movable blocking block; 8. an oblique drive rod; 9. an electromagnet; 10. a return tension spring; 11. a manual control lever; 12. an armature.

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, an electrical protection device for a dc distributed energy smart lighting circuit comprises a housing 1, a stationary contact 2, a movable contact 3 and a compression spring 4, wherein the stationary contact 2 is fixedly connected with the housing 1, the movable contact 3 is movably connected with the housing 1 through the compression spring 4, the stationary contact 2 and the movable contact 3 are aligned with each other, an insulation sheet 6 is arranged between the stationary contact 2 and the movable contact 3, the insulation sheet 6 is squeezed between the stationary contact 2 and the movable contact 3 to disconnect the stationary contact 2 and the movable contact 3, one side of the stationary contact 2 and one side of the movable contact 3 are provided with gradually expanding openings to ensure the smooth insertion of the insulation sheet 6, one side of the stationary contact 2 and one side of the movable contact 3 are provided with a guide plate 5, the guide plate 5 guides the movement of the insulation sheet 6 to ensure that the insulation sheet 6 is inserted between the stationary contact 2 and the movable contact 3, the insulation sheet 6 is movably connected with two oblique driving rods 8 through a driven rod 7, the two oblique driving rods 8 form a herringbone, connecting shafts of the two oblique driving rods 8 are connected with armatures 12, one end of each armature 12 is connected with a pre-tensioned reset tension spring 10, the oblique driving rods 8 are pulled upwards by the reset tension springs 10 to be changed into the herringbone, the other ends of the armatures 12 are provided with electromagnets 9, the electromagnets 9 generate magnetic force under the action of action current, the armatures 12 are attracted to enable the two oblique driving rods 8 to be changed into straight lines, the two oblique driving rods 8 drive the insulating sheet 6 under the action of suction force of the electromagnets 9 to enable the insulating sheet 6 to be inserted between the fixed contact 2 and the movable contact 3, and the two oblique driving rods 8 return to the original positions under the action of the reset tension springs 10 to enable the fixed contact 2 and the movable contact 3 to be communicated.

Wherein, the 8 swing joint of oblique actuating lever has manual control pole 11, and manual control pole 11 runs through the lateral wall of casing 1, is equipped with the inclined spread groove between manual control pole 11 and the oblique actuating lever 8, guarantees manual control pole 11's rectilinear motion, but the motion of manual drive oblique actuating lever 8, the break-make of manual control relay through manual control pole 11.

Referring to fig. 2, the driven rod 7 includes an outer tube 71 and an inner movable rod 72, the inner movable rod 72 is sleeved inside the outer tube 71 and movably connected to the outer tube 71, a limit block 73 is disposed at an end of the inner movable rod 72 to limit the inner movable rod 72 to slide out of the outer tube 71, a movable block 75 with a locking structure is disposed at an inner side of a connecting cavity between the outer tube 71 and the inner movable rod 72, a pressing block 74 is disposed at an outer side of the limit block 73, the pressing block 74 protrudes from the limit block 73 to press the movable block 75 to switch states of the movable block 75, the locking structure alternately locks and releases the movable block 75 when being pressed, the movable block 75 is in a state of being retracted into the inner wall when being locked, the inner movable rod 72 is free to slide, the movable block 75 is in a state of being completely extended when being released, the limit block 73 is locked at this time, and the inner movable rod 72 and the limit block 73 are in a shorter state, that is, when the electromagnet 9 attracts the armature 12 for the first time, the inclined driving rod 8 becomes horizontal, the insulation sheet 6 is inserted between the fixed contact 2 and the movable contact 3, the magnetic force of the electromagnet 9 disappears, the inclined driving rod 8 is reset under the action of the reset tension spring 10, and since the movable block 75 is in a locked state at this time, the inner movable rod 72 slides freely to ensure the reset of the inclined driving rod 8 and the armature 12, when the electromagnet 9 is powered on again, the pressing block 74 presses the movable block 75 for the second time, the movable block 75 is completely released and extended to block the limit block 73, the insulation sheet 6 is pulled out when the inclined driving rod 8 is reset, referring to fig. 3, the movable block 75 ensures the upper and lower ratchets and the runner in the middle, the lower part is provided with a spring, the length released when each time is pressed is different, and is common in ball pens, and detailed description of the prior art is omitted.

Referring to fig. 4, the electromagnet 9 is electrically connected to a capacitor, the controller controls the action current to charge the capacitor, a buffer unit is connected in series between the capacitor and the electromagnet 9, the controller controls the voltage at two ends of the buffer unit, when the buffer unit applies the voltage of the action current, the buffer unit is connected, so that the circuit between the capacitor and the electromagnet 9 is connected, a large magnetic field is generated instantaneously to drive the armature 12 to move, when the buffer unit does not apply the voltage of the action current, the buffer unit disconnects the capacitor from the electromagnet 9, and the controller controls the action current to charge the capacitor.

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

when power needs to be cut off, the controller controls the electromagnet 9 to be electrified, the electromagnet 9 generates a magnetic field instantly when being electrified, the armature 12 is driven to move, the inclined driving rod 8 is driven to move, the driven rod 7 and the insulation sheet 6 are driven to move, the insulation sheet 6 is inserted between the fixed contact 2 and the movable contact 3, the communication of a circuit is separated, the circuit is cut off, at the moment, the movable blocking block 75 is pressed for the first time, the movable blocking block 75 is in a contraction state, the inner movable rod 72 freely moves, under the action of the reset tension spring 10, as the inclined driving rod 8 is retracted, when power is needed to be supplied, the electromagnet 9 is powered on to generate a magnetic field, the inner movable rod 72 moves, the movable blocking block 75 is pressed by the pressing block 74, so that the movable blocking block 75 extends out to block the limiting block 73, when the inclined driving rod 8 is reset, the outer tube 71 and the insulation sheet 6 are driven to contract, and the insulation sheet 6 is pulled out, so that the fixed contact 2 is communicated with the movable contact 3.

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 direct current distributed energy wisdom lighting circuit electrical protection device, includes casing (1), stationary contact (2), movable contact (3) and pressure spring (4), stationary contact (2) and casing (1) fixed connection, movable contact (3) are through pressure spring (4) and casing (1) swing joint, its characterized in that: still include insulating piece (6), insulating piece (6) can insert the intercommunication of disconnection between stationary contact (2) and movable contact (3), one side of stationary contact (2) and movable contact (3) is equipped with deflector (5), insulating piece (6) have two dead lever (8) through driven lever (7) swing joint, two the chevron shape is constituteed to dead lever (8), two the connecting axle of dead lever (8) is connected with armature (12), the one end of armature (12) is connected with pretension's extension spring (10) that resets, the other end of armature (12) is equipped with electro-magnet (9), two dead lever (8) drive insulating piece (6) under the suction effect of electro-magnet (9) and make insulating piece (6) insert between stationary contact (2) and movable contact (3), two the home position is got back to dead lever (8) under the effect of extension spring (10) that resets, the driven rod (7) comprises an outer tube (71) and an inner movable rod (72), a limiting block (73) is arranged at the end part of the inner movable rod (72), a movable blocking block (75) with a locking structure is arranged at one side, close to the inner, of a connecting cavity of the outer tube (71) and the inner movable rod (72), a pressing block (74) is arranged at one side, close to the outer, of the limiting block (73), and the locking structure alternately locks and releases the movable blocking block (75) when being pressed.

2. The electrical protection device of claim 1, wherein the electrical protection device comprises: the utility model discloses a casing, including casing (1), oblique actuating lever (8), manual control pole (11) have, be equipped with the inclined connecting groove between manual control pole (11) and oblique actuating lever (8).

3. The electrical protection device of claim 1, wherein the electrical protection device comprises: the electric connection of electro-magnet (9) has the electric capacity, and the controller control action current charges for the electric capacity, it has the buffer unit to establish ties between electric capacity and electro-magnet (9), the voltage at buffer unit both ends is controlled to the controller, and when the buffer unit applyed the voltage of action current, the buffer unit was in the intercommunication, and when the buffer unit did not applyed the voltage of action current, the buffer unit disconnection electric capacity and electro-magnet (9) the intercommunication.