Self-gravity rapid arc cutting and extinguishing device
The self-gravity rapid arc extinguishing device, which combines self-gravity and magnetic field, solves the problems of incomplete arc segmentation and short grid life in existing arc extinguishing systems, and realizes rapid arc extinguishing and efficient arc extinguishing, thereby improving the breaking capacity and service life of the circuit breaker.
Patent Information
- Application Number
- CN202423233095.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-12-26
AI Technical Summary
Existing arc extinguishing systems suffer from incomplete arc segmentation, high risk of arc reignition, short lifespan of arc extinguishing grids, slow arc movement speed, and existing improvement measures have failed to effectively reduce arc energy.
By combining gravity and magnetic field, the arc-extinguishing device rapidly cuts and extinguishes the arc through the movement of the moving and stationary contacts, combined with the action of the magnetic field, forming a sealed, high-temperature resistant, and insulated arc-extinguishing chamber, thus achieving rapid arc interruption and energy reduction.
It achieves rapid arc extinguishing, improves the breaking capacity and service life of the circuit breaker, has a simple structure and saves space, and enhances the arc extinguishing effect.
Smart Images
Figure CN223612277U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the field of circuit breaker equipment technology, especially relates to a self-gravity quick arc cutting arc extinguishing device. BACKGROUND
[0002] Arc extinguishing device is a kind of device specially designed for controlling arc, its role is to prevent the generation of arc or make arc extinguish quickly when cutting off current.Arc is a kind of gas discharge phenomenon generated under the action of voltage, if not controlled, arc can cause fire or damage equipment.The arc extinguishing system of circuit breaker is arc extinguishing device, usually contains one or more arc extinguishing devices in the circuit breaker, so as to effectively control the generation and extinguishing of arc when cutting off circuit.
[0003] When facing current switching, the arc extinguishing system of circuit breaker must intervene quickly and effectively.It uses the rapid movement of moving contact to lengthen arc, so that it becomes fragile in the rapid drop of voltage.Then, the grid of arc chamber is used, which accurately cuts arc, so that the temperature of arc drops sharply until extinguishing.This series of actions is completed in the process of circuit breaker opening, and the effect of arc extinguishing completely depends on the capacity of arc chamber and the exquisite design of its internal structure.
[0004] However, although the existing arc extinguishing system can effectively suppress arc to some extent, it still faces some challenges.For example, the division of arc may not be complete, and there is a risk of arc reignition.In addition, the service life of arc extinguishing grid is relatively short, and the movement speed of arc is relatively slow.The improvement of circuit breaker arc extinguishing system is mainly reflected in the improvement of the speed of arc entering arc chamber and the speed of arc generation to division, but it still does not fundamentally reduce the arc energy.
[0005] The existing circuit breaker adopts arc extinguishing grid to divide arc into multiple sections, and generates anode and cathode voltage drop to make arc extinguish, which has the defects of short service life of grid and slow movement speed of arc.To improve arc extinguishing capacity, arc generating device is added or more complex arc extinguishing technology is adopted, which makes the structure of circuit breaker more complex and the volume larger.In use, there are many inconveniences, so it cannot achieve the purpose of efficient arc extinguishing, and ensure the safe, stable and efficient operation of power system. UTILITY MODEL CONTENTS
[0006] The technical problem to be solved by the utility model is to provide a self-gravity quick arc cutting arc extinguishing device, which can quickly extinguish arc when arc is generated through the action of self-gravity, and cooperate with the action of magnetic field to quickly lengthen and extinguish the generated tiny arc, thereby reducing the heat generated by arc from the root, and the structure is simple, and arc can be quickly and efficiently extinguished.
[0007] The utility model provides a kind of self-gravity quick arc cutting arc extinguishing device, it is installed in circuit breaker, it includes moving contact and static contact, the moving contact one end is connected with circuit breaker, the static contact is fixedly connected with circuit breaker, circuit breaker drives moving contact movement, it further includes arc extinguishing wallboard, arc extinguishing insulating piece and arc extinguishing rotating shaft, the arc extinguishing wallboard is like a fence, the arc extinguishing insulating piece and arc extinguishing rotating shaft are equipped with two, the arc extinguishing insulating piece is respectively rotated and installed in arc extinguishing wallboard top left and right sides by arc extinguishing rotating shaft, the arc extinguishing insulating piece includes magnet slot and arc extinguishing insulating plate, the magnet slot is located arc extinguishing wallboard peripheral side, the arc extinguishing insulating plate is located arc extinguishing wallboard inner side, and left and right sides arc extinguishing insulating plate is horizontally state and abuts;The moving contact is equipped with moving contact point in the end away from circuit breaker, the static contact is equipped with static contact point, the static contact point is located in arc extinguishing wallboard, and the moving contact point and static contact point separate and open or contact close;When open, the arc extinguishing insulating plate of two located in arc extinguishing wallboard inner side abuts, the moving contact point is located above arc extinguishing wallboard, and there is spacing with arc extinguishing insulating plate;When close, the arc extinguishing insulating plate of two located in arc extinguishing wallboard inner side separates, and the moving contact point is located in arc extinguishing wallboard and contacts with static contact point.Arc extinguishing insulating plate horizontally state and abuts, i.e. the magnet slot and arc extinguishing insulating plate in arc extinguishing insulating piece are equal weight.
[0008] Preferably, the moving contact is equipped with a rounded corner near the end of the moving contact point, and in the closed state, the rounded corner abuts the arc extinguishing insulating plate. This allows the moving contact to be more wear-resistant and enhances the service life.
[0009] Preferably, a permanent magnet is provided in the magnet slot, with the N-pole facing upwards and the S-pole facing downwards. The magnetic field of the permanent magnet in the magnet slot can change the movement trajectory of the tiny electric arc in the high-temperature-resistant arc-extinguishing chamber when the circuit breaker is opened, thereby accelerating the extinction of the electric arc.
[0010] Preferably, the static contact is provided with a bent portion, and the thickness of the bent portion is 3-5 mm. The bent portion generates a magnetic field in the opposite direction to offset the interference of the magnetic field on arc extinguishing, and it also raises the static contact point for contact with the moving contact point.
[0011] Preferably, the moving contact is made of copper-nickel plating material, the moving contact point is surrounded by a high-temperature-resistant insulating coating, and the moving contact is provided with an insulating protective sleeve.
[0012] Preferably, the static contact point is made of copper-nickel plating material, the static contact point is surrounded by a high-temperature-resistant insulating coating, and the static contact is provided with an insulating protective sleeve.
[0013] Preferably, the arc extinguishing wallboard, arc extinguishing insulating piece, and arc extinguishing rotating shaft are all made of high-temperature-resistant insulating material.
[0014] Preferably, the arc extinguishing insulating plate and the outer surface of the arc extinguishing rotating shaft are both provided with a layer of buffer protective layer.
[0015] Preferably, a screw hole is arranged on the static contact, and the static contact is fixedly connected with the circuit breaker base through a screw passing through the screw hole.
[0016] The utility model has the following technical effects:
[0017] 1. In the non-closing state, the two arc-extinguishing insulation plates on the inner side of the arc-extinguishing wall plate physically separate the moving contact and the static contact. In order to contact the static contact, the moving contact of the moving contact rotates the arc-extinguishing insulation plate around the rotating shaft under the external force of the circuit breaker, so that the arc-extinguishing insulation plate is separated by a certain angle, until the moving contact is in full contact with the static contact. Under the action of external force, the moving contact maintains the state of contact with the static contact, shortens the closing arc time, improves the breaking capacity of the circuit breaker, and prolongs the service life of the circuit breaker. When the circuit breaker is opened, the moving contact rotates quickly away from the static contact, and the force acting on the arc-extinguishing insulation plate disappears quickly, so that the arc-extinguishing insulation plate is no longer hindered by the moving contact. Under the action of the gravity of the magnet in the magnet slot, the arc-extinguishing insulation part moves quickly when it is not subjected to the force of the moving contact. The arc-extinguishing insulation part rotates quickly along the arc-extinguishing rotating shaft, until the two arc-extinguishing insulation plates maintain a horizontal state of abutment without external force, and the arc-extinguishing insulation part is closed. Since the arc-extinguishing insulation part can rotate around the arc-extinguishing rotating shaft, the arc-extinguishing insulation plates in the two arc-extinguishing insulation parts are closed by gravity, and the arc cutting action is completed. Thus, the moving contact and the static contact are quickly inserted between the moving contact and the static contact to cut off the arc, quickly cut off the arc, and achieve arc cutting. At the same time, the arc-extinguishing insulation part, the arc-extinguishing wall plate and the static contact form a closed high-temperature-resistant insulating arc-extinguishing chamber, accelerate the extinction of the generated small arc, and achieve the weakening of the arc energy from the root.
[0018] 2. The magnetic field in the magnet slot can change the movement trajectory of the small arc in the insulating arc-extinguishing chamber composed of the arc-extinguishing insulation part, the arc-extinguishing wall plate and the static contact when the circuit breaker is opened, and accelerate the extinction of the arc.
[0019] 3. The combination of arc cutting and magnetic arc extinguishing has stronger arc-extinguishing effect and stronger breaking capacity of the circuit breaker.
[0020] 4. The structure is simple, can save the space of the circuit breaker, and has strong durability. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 It is a closing structure schematic view of the arc-extinguishing device of the utility model;
[0022] Figure 2 It is a closing structure schematic view of the arc-extinguishing device of the utility model;
[0023] Figure 3 It is a closing structure schematic view of the arc-extinguishing device of the utility model;
[0024] Figure 4 It is the closing side view structural schematic diagram of arc extinguishing device of the utility model;
[0025] Figure 5 It is the closing side view structural schematic diagram of arc extinguishing device of the utility model Figure 4 It is the closing side view structural schematic diagram of arc extinguishing device of the utility model
[0026] Figure 6 It is the closing side view structural schematic diagram of arc extinguishing device of the utility model Figure 5 It is the closing side view structural schematic diagram of arc extinguishing device of the utility model
[0027] Figure 7 It is the closing side view structural schematic diagram of arc extinguishing device of the utility model
[0028] Figure 8 It is the closing side view structural schematic diagram of arc extinguishing device of the utility model
[0029] In the drawing: 1, moving contact; 11, moving contact point; 12, round angle part; 2, static contact; 21, static contact point; 3, arc extinguishing insulation piece; 31, magnet slot; 32, arc extinguishing insulation board; 4, arc extinguishing rotating shaft; 5, arc extinguishing wall board; 6, part circuit breaker base. DETAILED DESCRIPTION
[0030] In order to make the purpose, technical scheme and advantage of the utility model more clear, the following will be specifically described to the utility model in combination with the drawing.
[0031] As Figures 1 to 8As shown, a self-gravity quick arc cutting and arc extinguishing device is installed in a circuit breaker, which comprises a moving contact 1 and a static contact 2, one end of the moving contact 1 is connected with the circuit breaker, the static contact 2 is fixedly connected with the circuit breaker, the circuit breaker drives the moving contact 1 to move, and the device further comprises an arc extinguishing wall plate 5, arc extinguishing insulation pieces 3 and arc extinguishing rotating shafts 4, the arc extinguishing wall plate 5 is in the form of a surrounding plate, the arc extinguishing insulation pieces 3 and the arc extinguishing rotating shafts 4 are both provided with two, the arc extinguishing insulation pieces 3 are respectively rotatably installed at the top and the left and right sides of the arc extinguishing wall plate 5 through the arc extinguishing rotating shafts 4, the arc extinguishing insulation pieces 3 comprise magnet grooves 31 and arc extinguishing insulation plates 32, the magnet grooves 31 are located at the outer peripheral side of the arc extinguishing wall plate 5, the arc extinguishing insulation plates 32 are located at the inner peripheral side of the arc extinguishing wall plate 5, and the arc extinguishing insulation plates 32 at the left and right sides abut each other in the horizontal state; the moving contact 1 is provided with a moving contact point 11 at the end away from the circuit breaker, the static contact 2 is provided with a static contact point 21, the static contact point 21 is located in the arc extinguishing wall plate 5, and the moving contact point 11 and the static contact point 21 are separated in the opening state or are in contact in the closing state; in the opening state, the two arc extinguishing insulation plates 32 at the inner peripheral side of the arc extinguishing wall plate 5 abut each other, the moving contact point 11 is located above the arc extinguishing wall plate 5 and has a spacing with the arc extinguishing insulation plates 32; in the closing state, the two arc extinguishing insulation plates 32 at the inner peripheral side of the arc extinguishing wall plate 5 are separated, and the moving contact point 11 is located in the arc extinguishing wall plate 5 and is in contact with the static contact point 21. The arc extinguishing insulation plates 32 abut each other in the horizontal state, that is, the magnet grooves 31 and the arc extinguishing insulation plates 32 in the arc extinguishing insulation pieces 3 are equal in weight.
[0032] As Figure 3 , Figure 4As shown, in the un-closed state, the two arc-extinguishing insulation plates 32 on the inner side of the arc-extinguishing wall plate 5 physically separate the moving contact 11 from the static contact 21. In order to contact the static contact 21 of the static contact 2 for closing, the moving contact 1 rotates the arc-extinguishing insulation plates 32 around the rotating shaft under the external force of the circuit breaker, so that the arc-extinguishing insulation plates 32 are separated by a certain angle until the moving contact 11 is in full contact with the static contact 21. Under the action of external force, the moving contact 11 remains in contact with the static contact 21, shortens the closing arc time, improves the breaking capacity of the circuit breaker, and prolongs the service life of the circuit breaker. When opening, the moving contact 11 rotates quickly away from the static contact 21, and the force acting on the arc-extinguishing insulation plates 32 disappears quickly. Then the arc-extinguishing insulation plates 32 are no longer hindered by the moving contact 1, and the arc-extinguishing insulation member 3 moves quickly under the gravity of the magnet slot 31 without the action of the moving contact 1. The arc-extinguishing insulation member 3 rotates quickly along the arc-extinguishing rotating shaft 4 until the two arc-extinguishing insulation plates 32 remain horizontal and abut without external force, and the arc-extinguishing insulation member 3 is closed. Since the arc-extinguishing insulation member 3 can rotate around the arc-extinguishing rotating shaft 4, the arc-extinguishing insulation plates 32 in the two arc-extinguishing insulation members 3 are closed by gravity, and the arc cutting action is completed. Thus, the arc-extinguishing insulation plates 32 in the arc-extinguishing insulation member 3 installed on the left and right sides of the arc-extinguishing wall plate 5 quickly insert between the moving contact 11 and the static contact 21 to cut off the arc, quickly cut off the arc, and achieve arc cutting. At the same time, the arc-extinguishing insulation member 3, the arc-extinguishing wall plate 5, and the static contact 2 form a closed high-temperature-resistant insulation arc-extinguishing chamber, accelerate the extinction of the small arc, and achieve the reduction of arc energy from the root.
[0033] As shown in the figure, the moving contact 1 is provided with a rounded corner 12 near the end of the moving contact 11. In the closed state, the rounded corner 12 abuts against the arc-extinguishing insulation plate 32. This makes the moving contact 1 more wear-resistant and enhances the service life. Figure 6
[0034] The magnet slot 31 is provided with a permanent magnet, and the N pole of the permanent magnet faces upward and the S pole faces downward. The magnetic field of the permanent magnet in the magnet slot 31 can change the movement trajectory of the small arc in the high-temperature-resistant insulation arc-extinguishing chamber during opening, and accelerate the extinction of the arc. The combination of arc cutting and magnetic attraction arc extinguishing makes the arc-extinguishing effect stronger and the breaking capacity of the circuit breaker stronger. The structure is simple, can save the space of the circuit breaker, and has strong structural durability.
[0035] As shown in the figure, the static contact 2 is provided with a bent portion, and the thickness of the bent portion is 3-5 mm. The bent portion can offset the magnetic field of the copper bar in the opposite direction to eliminate the interference of the magnetic field on the arc-extinguishing, and can also lift the static contact 21 for contact with the moving contact 11. Figure 7
[0036] The movable contact 1 is made of copper plated nickel material, the movable contact point 11 is provided with a high-temperature-resistant insulating coating, and the movable contact 1 is provided with an insulating protective sleeve.
[0037] The static contact point 21 is made of copper plated nickel material, the static contact point 21 is provided with a high-temperature-resistant insulating coating, and the static contact 2 is provided with an insulating protective sleeve.
[0038] The arc extinguishing wall plate 5, the arc extinguishing insulating piece 3 and the arc extinguishing rotating shaft 4 are all made of high-temperature-resistant insulating material.
[0039] The arc extinguishing insulating plate 32 and the outer surface of the arc extinguishing rotating shaft 4 are both provided with a buffer protective layer.
[0040] The static contact 2 is provided with a screw hole, and the static contact 2 is fixedly connected with the circuit breaker base 6 through a screw penetrating through the screw hole.
[0041] The above-described embodiments only describe the preferred modes of the utility model, and do not limit the scope of the utility model, and various deformations and improvements of the technical scheme of the utility model made by the ordinary skilled in the art without departing from the design spirit of the utility model shall fall within the protection scope determined by the claim book of the utility model.
Claims
1. A self-gravity quick arc splitting and extinguishing device installed in a circuit breaker, comprising a moving contact and a stationary contact, one end of the moving contact being connected with the circuit breaker, the stationary contact being fixedly connected with the base of the circuit breaker, the circuit breaker driving the moving contact to move, characterized in that, It also includes arc-extinguishing wall plate, arc-extinguishing insulation and arc-extinguishing rotating shaft, the arc-extinguishing wall plate is in the form of fence, the arc-extinguishing insulation and arc-extinguishing rotating shaft are both provided with two, the arc-extinguishing insulation is respectively rotatably installed on the top of arc-extinguishing wall plate left and right sides through arc-extinguishing rotating shaft, the arc-extinguishing insulation includes magnet slot and arc-extinguishing insulation plate, the magnet slot is located on the outer side of arc-extinguishing wall plate, the arc-extinguishing insulation plate is located on the inner side of arc-extinguishing wall plate, and the arc-extinguishing insulation plates on the left and right sides are in abutment in horizontal state;The moving contact is provided with a moving contact point at the end away from the circuit breaker, the static contact is provided with a static contact point, the static contact point is located in the arc-extinguishing wall plate, and the moving contact point and the static contact point are separated in the open state or contacted in the closed state;In the open state, the two arc-extinguishing insulation plates on the inner side of arc-extinguishing wall plate are in abutment, the moving contact point is located above the arc-extinguishing wall plate, and there is a spacing between the moving contact point and the arc-extinguishing insulation plate;In the closed state, the two arc-extinguishing insulation plates on the inner side of arc-extinguishing wall plate are separated, and the moving contact point is located in the arc-extinguishing wall plate and contacts with the static contact point.
2. The self-gravity quick arc splitting and extinguishing device according to claim 1, characterized in that: The moving contact is provided with a rounded corner part at the end close to the moving contact point, and in the closed state, the rounded corner part abuts against the arc-extinguishing insulation plate.
3. The self-gravity quick arc splitting and extinguishing device according to claim 1, characterized in that: The magnet slot is provided with a permanent magnet, the N pole of the permanent magnet faces upward, and the S pole faces downward.
4. The self-gravity quick arc splitting and extinguishing device according to claim 1, characterized in that: The static contact is provided with a bent part, and the thickness of the bent part is 3-5mm.
5. The self-gravity quick arc splitting and extinguishing device according to claim 1, characterized in that: The moving contact is provided with an insulation protective sleeve.
6. The self-gravity quick arc splitting and extinguishing device according to claim 1, characterized in that: The static contact is provided with an insulation protective sleeve.
7. The self-gravity quick arc splitting and extinguishing device according to claim 1, characterized in that: The arc-extinguishing insulation plate and the outer surface of arc-extinguishing rotating shaft are both provided with a layer of buffer protective layer.
8. The self-gravity quick arc splitting and extinguishing device according to claim 1, characterized in that: The static contact is provided with a screw hole, and the static contact is fixedly connected with the circuit breaker base through the screw passing through the screw hole.