Six-groove cup-shaped electrode contact seat structure and vacuum arc-extinguishing chamber

Abstract

The utility model discloses a six-groove cup-shaped electrode contact seat structure and a vacuum arc-extinguishing chamber, a first electrode contact seat and a second electrode contact seat are respectively provided with three first chutes which are inclined towards the same direction, and the chutes provide multi-element transmission channels which are clear in guiding for current, so that the current is dispersed, multiple strands of current flow in parallel, and the current transmission efficiency is improved. And meanwhile, through the interval length difference between the first skewed slot and the second skewed slot, the situation that the flow guide section at the root of the skewed slot is limited, the local current density is too large, and the resistance is too high is avoided, and the overall resistance of the loop is reduced in an all-around mode. On the basis of an existing six-groove cup-shaped longitudinal magnetic electrode, through the differentiated long and short contact finger structure design, on the basis of ensuring the on-off performance, the diversion of the electrode is effectively improved, and the requirement of a low-resistance vacuum arc-extinguishing chamber is met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of vacuum arc extinguishing chamber, and relates to a six-slot cup-shaped electrode contact seat structure and a vacuum arc extinguishing chamber. BACKGROUND

[0002] As an environmental protection and green power product, the vacuum circuit breaker is applied more and more widely in power grids. As a core component of the vacuum circuit breaker, the vacuum arc extinguishing chamber promotes the development of the vacuum circuit breaker. In recent years, with the further improvement of environmental protection requirements, the application field of the vacuum arc extinguishing chamber is further extended.

[0003] However, with the rapid development of the environmental protection type gas-filled cabinet, the heat dissipation condition of the switch is more severe due to the environmental protection type gas-filled cabinet. In order to meet the use requirements, the vacuum arc extinguishing chamber of this type has a lower requirement on heat loss, and a higher requirement on the resistance of the vacuum arc extinguishing chamber. The vacuum arc extinguishing chamber with extremely low resistance is required to meet the market demand of the product. At present, the six-slot cup-shaped electrode vacuum arc extinguishing chamber is widely used in the medium voltage switch field due to excellent breaking capacity. However, the loop resistance of the conventional six-slot cup-shaped electrode structure is high due to the structural characteristics, so that the electric energy transmission efficiency from the power supply end to the load end is reduced, the load cannot be provided with stable and sufficient electric energy, and the normal operation of the load is affected. UTILITY MODEL CONTENTS

[0004] The utility model aims at solving the problem of high loop resistance of the conventional six-slot cup-shaped electrode structure due to the structural characteristics in the prior art, and provides a six-slot cup-shaped electrode contact seat structure and a vacuum arc extinguishing chamber.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] The utility model provides a six-slot cup-shaped electrode contact seat structure, which comprises a first electrode contact seat and a second electrode contact seat sleeved together.

[0007] Three first inclined grooves inclined to the same direction are formed in the outer walls of the first electrode contact seat and the second electrode contact seat.

[0008] Preferably, the first inclined grooves and the second inclined grooves are formed at equal intervals.

[0009] Preferably, the length of the second inclined grooves is greater than half the length of the first inclined grooves.

[0010] Preferably, the first electrode contact seat and the second electrode contact seat are copper or copper alloy materials.

[0011] Preferably, the width of the first inclined groove is equal to the width of the second inclined groove.

[0012] Preferably, the first inclined groove is a straight line structure.

[0013] Preferably, the second inclined groove is a straight line structure.

[0014] Preferably, the first electrode contact seat and the second electrode contact seat are coaxially arranged.

[0015] Preferably, the diameter of the first electrode contact seat and the diameter of the second electrode contact seat are equal.

[0016] A vacuum arc-extinguishing chamber adopts a six-groove cup-shaped electrode contact seat structure.

[0017] Compared with the prior art, the six-groove cup-shaped electrode contact seat structure has the following beneficial effects:

[0018] The six-groove cup-shaped electrode contact seat structure has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the premise of the drawings.

[0020] Figure 1 The six-groove cup-shaped electrode contact seat structure is a whole structure diagram.

[0021] Figure 2 The six-groove cup-shaped electrode contact seat structure is a side view.

[0022] Figure 3The utility model discloses a cup-shaped six-slot longitudinal magnetic electrode simulation model of unequal length interval.

[0023] Figure 4 The utility model discloses six-slot longitudinal magnetic electrode static magnetic field direct current resistance calculation value ((a) is cup-shaped six-slot longitudinal magnetic electrode static magnetic field direct current resistance calculation value of conventional equal length structure;(b) is cup-shaped six-slot longitudinal magnetic electrode static magnetic field electrode direct current resistance calculation value of unequal length interval structure).

[0024] Figure 5 The utility model discloses six-slot longitudinal magnetic electrode eddy current field rated opening distance center plane magnetic field equipotential line diagram ((a) is cup-shaped six-slot longitudinal magnetic electrode eddy current field rated opening distance center plane magnetic field equipotential line of conventional equal length structure;(b) is cup-shaped six-slot longitudinal magnetic electrode eddy current field rated opening distance center plane magnetic field equipotential line of unequal length interval structure).

[0025] Wherein: 1 - first inclined groove, 2 - second inclined groove. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantage of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model below, obviously, the described embodiments are a part of the embodiments of the utility model, not all the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the utility model.

[0028] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0029] In the description of the embodiments of the utility model, it needs to be explained that, if the terms "upper", "lower", "horizontal", "inner" and the like indicate the position or location relationship based on the position or location relationship shown in the drawings, or the position or location relationship when the utility model product is usually placed, it is only for the convenience of describing the utility model and simplifying the description, and it does not indicate or imply that the indicated device or element must have a specific position, be constructed and operated in a specific position, therefore it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0030] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0031] In the description of the embodiments of the utility model, it also needs to be explained that, unless otherwise explicitly specified and limited, if the terms "arrangement", "installation", "connection", "connection" appear, they should be understood in a broad sense, for example, they can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or can be connected inside two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation.

[0032] The utility model will be described in further detail below in combination with the drawings:

[0033] The utility model provides a kind of six-slot cup-shaped electrode contact seat structure, as shown in Figure 1 And Figure 2 It includes the first electrode contact seat and the second electrode contact seat of being sleeved together;A plurality of first inclined grooves inclined to the same direction are formed in the outer wall of the first electrode contact seat and the second electrode contact seat;Second inclined grooves are formed between adjacent first inclined grooves on the first electrode contact seat and between adjacent first inclined grooves on the second electrode contact seat, and the length of the first inclined groove is greater than the length of the second inclined groove.

[0034] Preferably, the first inclined groove and the second inclined groove are both equally spaced, so that the current can be more evenly distributed into the paths guided by each inclined groove when flowing through the contact seat structure. It can avoid the situation that the local current is too large to cause the resistance of the part to increase relatively due to the high current density, ensure the uniformity of current distribution in the entire contact seat structure, help to maintain stable and low loop resistance, and improve the current-carrying capacity of the electrode.

[0035] Preferably, the length of the second chute is greater than half the length of the first chute.

[0036] Preferably, the first electrode contact seat and the second electrode contact seat are made of copper or copper alloy material. Copper is a metal with good electrical conductivity, and its resistivity is very low. In the case of a certain contact seat structure size, the use of copper or copper alloy can maintain the electrical resistance of the electrode contact seat at a low level. Compared with some materials with poor electrical conductivity, the current is less hindered when transmitted in a copper contact seat, and can flow more smoothly. This plays a key role in reducing the resistance of the entire circuit and improving the current-carrying capacity of the electrode, helping to reduce the loss of electrical energy during transmission and ensuring efficient electrical energy transmission to meet the requirements of devices such as vacuum interrupters that require high current transmission. Copper and copper alloy can ensure the stability of current conduction, and can maintain relatively stable and reliable current transmission performance under different load current sizes, current change frequencies and other working conditions. Copper has excellent thermal conductivity, which means that when the contact seat generates heat during work due to current passing through, the heat can be quickly conducted to the outer wall of the contact seat through the copper or copper alloy material, and then dissipated to the surrounding environment. This is very important for maintaining the contact seat and the entire vacuum interrupter within a reasonable working temperature range, and can effectively prevent a series of problems such as insulation material aging and component performance degradation caused by overheating, and prolong the service life of the equipment.

[0037] Preferably, the width of the first chute is equal to the width of the second chute. When the widths of the first and second chutes are equal, it means that the "passage" provided by them for the current is consistent in width. When the current flows through the contact seat, it will not be biased to flow in one type of chute due to the difference in width of the chutes, but can be distributed in each chute in a uniform proportion, avoiding excessive or insufficient current in a local area, ensuring the uniformity and stability of the current distribution in the entire contact seat structure, helping to maintain stable and low loop resistance, and ensuring good current conducting effect of the electrode. In different working scenarios, the equal-width chutes can always maintain a stable current distribution mode. Whether it is small current or large current, based on this uniform channel width, smooth and orderly distribution and transmission can be achieved, so that the electrode contact seat structure can maintain reliable current conducting performance under various current working conditions, ensuring stable operation of the equipment and avoiding problems such as local overheating and unstable arc caused by uneven current distribution. The equal-width chutes form uniform heat dissipation channels on the outer wall of the contact seat. After heat is conducted from the inside of the contact seat to the outer wall, it can be evenly dissipated to the surrounding environment through these chutes of consistent width. Just like evenly distributed and equally sized ventilation openings on a building, which allow hot air to be evenly exhausted, equal-width chutes help to achieve uniformity of heat dissipation, avoid heat accumulation or poor dissipation in some areas due to different channel widths, improve the heat dissipation efficiency of the entire contact seat, and ensure stable operation of the equipment within a suitable temperature range, prolonging the service life of the equipment.

[0038] Preferably, the first chute is of a straight line type structure, and the second chute is of a straight line type structure. The straight line type second chute, as an auxiliary current passage, has a simple and direct structure and can finely distribute the current. After the current is preliminarily distributed through the first chute, the second chute can accurately disperse the remaining or further refined current to different areas in a straight line, like opening up numerous straight branches on the basis of the main road, perfecting the current distribution network in the entire contact seat, ensuring more uniform and reasonable current distribution, further optimizing the overall current conducting effect, and reducing the loop resistance. Although the straight line type second chutes have a relatively small heat dissipation surface area, they are evenly distributed between adjacent first chutes and can supplement heat dissipation. They can further disperse the heat gathered around the first chutes, assist the first chutes in heat dissipation, form a heat dissipation network with primary and secondary chutes in clear distinction and coordinated cooperation, avoid local overheating "dead angles", and ensure the thermal stability of the entire contact seat, ensuring that the equipment will not be affected in performance and reliability due to local overheating.

[0039] Preferably, the first electrode contact seat and the second electrode contact seat are coaxially arranged. The diameter of the first electrode contact seat is equal to the diameter of the second electrode contact seat.

[0040] Preferably, the contact seat is a cup-shaped six-slot electrode structure.

[0041] The simulation diagram of the six-slot cup-shaped electrode contact seat structure is described below as shown in Figure 3 The simulation results are as follows:

[0042] Through example simulation calculation, under the same electrode structure and material conditions, only the contact seat arm structure is different, the obtained AC field body resistance and DC field body resistance are effectively reduced, and the effective magnetic field area of 4 mT / kA or more is increased. The specific is as follows:

[0043] 1) Simulation calculation: using ANSYS electromagnetic field software:

[0044] Calculate the DC resistance under the Magnetotatic static magnetic field, with the DC current Current 1000A;

[0045] Calculate the AC resistance and magnetic field strength under the rated opening distance under the EddyCurrent eddy current field, with the AC current Current 1414A;

[0046] 2) Simulation results:

[0047] Under the Magnetotatic static magnetic field: the DC resistance of the conventional equal-length arm electrode is 6.32 μΩ, and the DC resistance of the new long-short interval arm electrode is 5.92 μΩ, as shown in Figure 4 (a) is the calculation value of the static magnetic field DC resistance of the conventional equal-length structure cup-shaped six-slot magnetic electrode, and (b) is the calculation value of the static magnetic field DC resistance of the unequal-length interval cup-shaped six-slot magnetic electrode.

[0048] Under the EddyCurrent eddy current field: the AC resistance of the conventional equal-length arm electrode is 9.25 μΩ, and the effective magnetic field area of 4 mT / kA or more is 2550.47 mm 2 ; the AC resistance of the new long-short interval arm electrode is 8.67 μΩ, and the effective magnetic field area of 4 mT / kA or more is 2732.59 mm 2 . As shown in Figure 5 (a) is the equipotential line of the cup-shaped six-slot magnetic electrode eddy current field under the rated opening distance of the central plane, and (b) is the equipotential line of the cup-shaped six-slot magnetic electrode eddy current field under the rated opening distance of the central plane.

[0049] It can be known from the above description that by adopting the long-short interval contact finger structure, the electrode body resistance is obviously improved, the DC field body resistance is reduced by 6.33%, the AC field body resistance is reduced by 6.27%, and the effective magnetic field area of 4mT / kA or more is expanded by 7.14%, so that the resistance is reduced, the effective arc control area is improved, and the breaking capacity of the electrode is improved. It can be effectively shown that the new long-short interval contact finger electrode effectively reduces the resistance, improves the current-carrying capacity of the electrode, increases the effective arc control area, and improves the breaking capacity. For special occasions, a new design idea and scheme are provided.

[0050] The six-slot cup-shaped electrode contact seat structure and the vacuum arc-extinguishing chamber provided by the utility model rationally design the slot structure of the six-slot cup-shaped electrode contact seat, adopt three long slots and three short slots, and the three long slots and the three short slots are distributed in an interval mode in the circumferential direction, so that the current-carrying of the electrode is effectively improved on the basis of ensuring the breaking performance, the resistance of the six-slot cup-shaped electrode is reduced, and the resistance of the vacuum arc-extinguishing chamber product is further reduced.

[0051] The above is only the preferred embodiment of the utility model, and is not used for limiting the utility model. For those skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement and the like within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A six-slot cup-shaped electrode contact seat structure, characterized by, The first electrode contact seat and the second electrode contact seat are sleeved together. Three first inclined grooves are formed on the outer wall of each of the first electrode contact seat and the second electrode contact seat and are inclined to the same direction; a second inclined groove is formed between adjacent first inclined grooves on the first electrode contact seat and between adjacent first inclined grooves on the second electrode contact seat, and the length of the first inclined groove is greater than the length of the second inclined groove.

2. A six-slot cup-shaped electrode contact seat structure according to claim 1, characterized in that, The first inclined grooves and the second inclined grooves are formed at equal intervals.

3. A six-slot cup-shaped electrode contact seat structure according to claim 1, characterized in that, The length of the second inclined groove is greater than half the length of the first inclined groove.

4. A six-slot cup-shaped electrode contact seat structure according to claim 1, characterized in that, The first electrode contact seat and the second electrode contact seat are made of copper or copper alloy material.

5. A six-slot cup-shaped electrode contact seat structure according to claim 1, characterized in that, The width of the first inclined groove is equal to the width of the second inclined groove.

6. A six-slot cup-shaped electrode contact seat structure according to claim 1, characterized in that, The first inclined groove has a straight line structure.

7. A six-slot cup-shaped electrode contact seat structure according to claim 1, characterized in that, The second inclined groove has a straight line structure.

8. A six-slot cup-shaped electrode contact seat structure according to claim 1, characterized in that, The first electrode contact seat and the second electrode contact seat are coaxially arranged.

9. A six-slot cup-shaped electrode contact seat structure according to claim 8, characterized in that, The diameter of the first electrode contact seat is equal to the diameter of the second electrode contact seat.

10. A vacuum interrupter, characterized by, The six-groove cup-shaped electrode contact seat structure of any one of claims 1-9 is adopted.

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