CN220381985U - Contact bridge assembly, isolating switch and power supply system with good current-carrying performance - Google Patents

Abstract

The utility model discloses a contact bridge assembly, an isolating switch and a power supply system with good current-carrying performance, which comprise a first contact bridge and a second contact bridge which are made of conductive materials, wherein the first contact bridge is positioned above the second contact bridge; the first contact bridge and the second contact bridge both comprise a body part and an end part positioned at one end of the body part, and the end parts of the first contact bridge and the second contact bridge can be used for the entry of the static contact; the conductive blocks are arranged between the body parts of the two contact bridges and are propped against the body parts of the two contact bridges to form electrical connection; the utility model has the characteristic of good current carrying effect.

Description

Contact bridge assembly, isolating switch and power supply system with good current-carrying performance

Technical Field

The utility model relates to a power supply system, belongs to an isolating switch in the power supply system, and particularly relates to a contact bridge assembly of the isolating switch.

Background

Disconnectors, often used in power distribution systems, include sliding disconnectors and disconnectors. Taking an isolating switch as an example, the isolating switch adopts a movable contact component to perform rotary motion so as to realize contact/separation with a static contact, thereby completing the on/off of the isolating switch. The movable contact assembly structure of the existing isolating switch is shown as CN213400978U, and discloses a contact support, a switch unit and a rotary switch, which comprises a movable contact group, wherein the movable contact group consists of two conductive elastic sheets, a gap is formed at two end positions after the two elastic sheets are stacked, the gap is used for clamping a fixed contact, the movable contact group of the type has better deformation capability (in order to facilitate the entering of the fixed contact to deform and the returning of the fixed contact to leave, the better deformation capability is required), each conductive elastic sheet is not thick, the current carrying capacity of a conductor is closely related to the current carrying area of the conductor, and the current carrying area of the conductive elastic sheet is relatively smaller when the conductive elastic sheet is too thin under the condition of other size limitation. Therefore, the current-carrying performance of the conventional movable contact is not ideal, and the pursuit of a user on the high performance of the switch is difficult to meet.

Disclosure of Invention

In view of the above, the utility model aims to overcome the defects in the prior art, and aims to provide a contact bridge assembly, an isolating switch and a power supply system with good current-carrying performance, which have good current-carrying performance and meet the demands of users.

The utility model provides a contact bridge assembly with good current carrying performance, which comprises a first contact bridge and a second contact bridge which are made of conductive materials, wherein the first contact bridge is positioned above the second contact bridge; the first contact bridge and the second contact bridge both comprise a body part and an end part positioned at one end of the body part, and the end parts of the first contact bridge and the second contact bridge can be used for the entry of the static contact; the conductive blocks are arranged between the body parts of the two contact bridges and are propped against the body parts of the two contact bridges to form electric connection.

By adopting the structure, the conductive block is arranged between the body parts of the two contact bridges and is electrically connected with the body parts, so that the current on the contact bridges can also move in the conductive block, compared with the prior art, the mechanism increases the current carrying area, namely, the current carrying area comprises the sectional area of the body parts of the two contact bridges plus the sectional area of the conductive block at the place at least on a certain partial section of the body parts, so that the current carrying performance is improved.

In some embodiments of the utility model, the thickness of the conductive block is greater than the thickness of the first contact bridge or/and the second contact bridge, and the thickness of the conductive block is not greater than 7 times the thickness of either contact bridge.

By adopting the structure, the larger the thickness of the conductive block is, the better the current carrying performance of the contact bridge assembly is, and the thickness of the conductive block is controlled to be less than (including 7 times) the thickness of the contact bridge, so that the contact bridge assembly can have higher current carrying performance under the reasonable space requirement.

In some embodiments of the present utility model, the body portion of the first contact bridge and/or the body portion of the second contact bridge is welded, screwed or riveted to the conductive block.

By adopting the structure, the stability between the contact bridge body part and the conductive block can be improved.

In some embodiments of the utility model, the body portion of the first contact bridge is integral with the body portion of the second contact bridge at a single location; the body part of the first contact bridge and the body part of the second contact bridge are welded or screwed or riveted on other sides, or the body part of the first contact bridge and the body part of the second contact bridge are welded or screwed or riveted on other sides with the conductive block.

By adopting the structure, the installation of the conductive block and the contact bridge body is facilitated, and the stability between the conductive block and the contact bridge body is improved.

In some embodiments of the present utility model, the body portion of the first contact bridge is provided with a first bending portion, and the body portion of the second contact bridge is provided with a second bending portion; the first bending part is lapped on the second contact bridge and/or the surface of the conductive block adjacent to the second contact bridge, and the second bending part is lapped on the first contact bridge and/or the surface of the conductive block adjacent to the first contact bridge.

By adopting the structure, the installation between the two contact bridge bodies and the conductive block is facilitated.

In some embodiments of the utility model, the conductive block is formed by stacking at least two conductive sheets; or, the conductive block is an integral piece.

By adopting the structure, the conductive block adopts an integrated piece, the temperature rise of the conductive block is smaller, and the conductive block is convenient to process. The conductive sheets stacked by at least two conductive sheets with the structure are easier to process than the conductive sheets with the structure of an integral part, and are beneficial to forming conductive blocks with various thickness specifications.

In some embodiments of the utility model, the spacing between the two contact bridge ends is less than the distance between the two contact bridge body portions.

By adopting the structure, the two contact bridge ends generate deformation force after being matched with the static contact, thereby being beneficial to clamping the static contact.

In some embodiments of the present utility model, the positioning device further comprises a positioning protrusion and a positioning groove, wherein one of the positioning protrusion and the positioning groove is arranged on the conductive block, and the other is arranged on either or both contact bridges.

By adopting the structure, the positioning and the matching between the conductive block and the contact bridge are facilitated, and the installation and the matching between the conductive block and the contact bridge are facilitated.

The isolating switch comprises an operation unit layer and at least two layers of switch unit layers which are arranged in a stacked manner, wherein a movable contact assembly and a fixed contact are arranged in the switch unit layers, and the operation unit layer is used for controlling the movement of the movable contact assembly in the switch unit layers so as to realize connection/disconnection with the fixed contact; the movable contact assembly comprises the contact bridge assembly with good current carrying performance.

By adopting the structure, the conducting blocks are arranged between the body parts of the two contact bridges and are electrically connected with the body parts, so that the current on the contact bridge can also move in the conducting blocks, and compared with the prior art, the mechanism increases the current carrying area, so that the isolating switch has higher current carrying performance.

A power supply system comprising a direct current source and a power conversion unit; the power conversion device further comprises the isolating switch, wherein the isolating switch is used for controlling the connection and disconnection of the direct current source and the power conversion unit.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 shows a functional block diagram of a power supply system according to an embodiment of the present utility model;

FIG. 2 shows a schematic diagram of the structure of an isolating switch according to an embodiment of the utility model;

fig. 3 shows a schematic structural diagram of a switching unit layer of an isolating switch according to an embodiment of the present utility model;

FIG. 4 is a schematic view of the structure of the contact bridge assembly of the present utility model;

FIGS. 5A-5E are schematic structural views of various embodiments of the conductive block of the present utility model;

fig. 6A-6J are schematic structural views showing various embodiments of the contact bridge and conductive block assembly of the present utility model.

Description of the embodiments

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Examples

As shown in fig. 1, an embodiment of the present utility model is a power supply system including a direct current source 101, a power conversion unit 102 (inverter), and a disconnector K for controlling on and off of the direct current source 101 and the power conversion unit 102 (inverter).

As shown in fig. 2 to 3, the isolating switch includes an operation unit layer 1 and a 3-layer switching unit layer 2 laminated under the operation unit layer 1. An operating mechanism is arranged on the operating unit layer 1, wherein the operating mechanism can be a purely manual operating mechanism, and a user can realize opening and closing operations by utilizing a knob arranged outside the operating unit layer 1, such as CN217134258U. The operating mechanism can also adopt a semi-manual operating mechanism, a user can realize opening and closing operation through a knob arranged outside the operating unit layer 1, and when the operating mechanism is in a closing state, the operating mechanism can also automatically realize opening and closing operation under the action of a release when receiving an external breaking signal, and CN216902575U is adopted. The operating mechanism can also adopt a manual and automatic mixed operating mechanism, a user can not only realize opening and closing operations by externally arranging a knob on the operating unit layer 1, but also realize opening and closing operations under the action of a motor or an electromagnet by utilizing remote giving of opening and closing signals to the isolating switch, for example, CN215578314U. Whatever the above-mentioned type of operating mechanism, it is a relatively common structure in the art, and its specific implementation forms are also various, as long as the contact/separation between the movable contact assembly 3 and the fixed contact 4 can be controlled.

The switch unit layer 2 is provided with a movable contact assembly 3 and a fixed contact 4 in each layer, a linkage structure is formed between the movable contact assembly 3 and an operating mechanism, and the movable contact assembly 3 can rotate through the movement of the operating mechanism, so that the movable contact assembly 3 is contacted with/separated from the fixed contact 4, and the switch is switched on and off. Each movable contact assembly 3 comprises a movable contact disc and a contact bridge assembly S arranged in the movable contact disc, and the specific contact bridge assembly structure is as follows:

as shown in fig. 4, in the present embodiment, the contact bridge assembly S includes a first contact bridge 31, a second contact bridge 32, and a conductive block 33. The first contact bridge 31 and the second contact bridge 32 are conductive elastic pieces, and the material of the conductive elastic pieces is conventional in the art, and will not be described herein. The conductive block 33 is also made of a conductive material which is conventional in the art. In the present embodiment, the first contact bridge 31 and the second contact bridge 32 each include two end portions 31a and one body portion 31b, and the conductive block 33 is disposed between the two body portions 31b and abuts against the two body portions 31b to form a conductive connection, so that the current carrying area can be increased and the current carrying performance can be improved, and the current carrying performance can be improved as long as the number of the conductive blocks 33 is increased compared with the prior art. The two adjacent end portions 31a of the first contact bridge 31 and the second contact bridge 32 have a tendency to be close to each other, so that the distance f between the two end portions 31a is smaller than the distance between the two body portions 31b, that is, the distance f between the two end portions 31a is smaller than the thickness D of the conductive block 33, and the structure is favorable for improving the clamping force in cooperation with the static contact.

Of course, in order to have better current-carrying performance, in the present embodiment, the thickness D of the conductive block 33 is greater than the sum of the thicknesses of the first contact bridge 31 and the second contact bridge 32, and the thickness D of the specific conductive block 33 is about 4 times the thickness D of the first contact bridge 31, so that the contact bridge assembly will have better current-carrying performance. In addition, the thickness D may be greater than the thickness D of the first contact bridge 31 and the second contact bridge 32, and not greater than 7 times, for example, 2 times, 3 times, 5 times, 6 times, and 7 times the thickness of the first contact bridge 31 and the second contact bridge 32, which may all achieve better current carrying performance.

As shown in fig. 5A to 5E, in the present embodiment, the conductive block 33 includes both a one-piece structure (formed as one piece) and a split structure. The integral structure includes both a structure in which the conductive piece 33 is formed by a single process, such as direct cutting or punching as shown in fig. 5A, and a structure in which the separate conductive piece 33a is fastened by welding (shown in fig. 5B), caulking (shown in fig. 5C), screw fastening (shown in fig. 5D), or the like. The split structure here, as shown in fig. 5E, includes at least 2 conductive sheets 33a stacked along the thickness direction of the contact bridge, and although there is no hard connection structure between the two conductive sheets 33a, the periphery of the movable contact plate limits the contact bridge assembly when the contact bridge assembly is assembled on the movable contact plate, and the two conductive sheets 33a are also limited when the contact bridge assembly is phase-changed. Of course, the conductive pieces 33a may be stacked along the width direction or the length direction of the contact bridge.

There are many types of mounting methods for the conductive block 33, and the following are examples of several embodiments:

as shown in fig. 6A and 6E, in the first embodiment, the body portion 31b of the first contact bridge 31 has first bending portions 31w bending toward the direction of the second contact bridge 32 on both sides, the body portion 31b of the second contact bridge 32 has second bending portions 32w bending toward the direction of the first contact bridge 31 on both sides, the first bending portions 31w overlap the lower surface of the second contact bridge 32, and the second bending portions 32w overlap the upper surface of the first contact bridge 31. Of course, as a modified example of this embodiment, as shown in fig. 6B and 6C, the first bending portion 31w may also overlap the surface of the conductive block 33 near the second contact bridge 32, and likewise, the second bending portion 32w may also overlap the surface of the conductive block 33 near the first contact bridge 31. As shown in fig. 6D, in still another modified embodiment, the body portions 31b of the first contact bridge 31 and the second contact bridge 32 are directly integrally formed on one side, and only the first bent portion 31w and the second bent portion 32w are provided on the other side, and the first bent portion 31w and the second bent portion 32w are overlapped in the above-described manner. Of course, the first bending portion 31w and the second bending portion 32w are both located outside the main body portion 31b, and as shown in fig. 6F to 6G, the first bending portion 31w and the second bending portion 32w may be provided inside, and the first bending portion 31w and the second bending portion 32w may pass through the conductive block 33 and overlap the conductive block 33 or overlap the corresponding contact bridge.

In addition, as shown in fig. 6H-6J, the contact bridge and the conductive block 33 may be fastened by rivets, welding, screws, or the like, and the conductive block 33 may be fixed to one or both of the contacts. As a further modified embodiment, the body portions 31b of the first contact bridge 31 and the second contact bridge 32 are directly integrally formed on one side, and only the other side is fastened by means of rivets, welding, screws, or the like.

Of course, in order to facilitate the cooperation of the conductive block 33 with the contact bridge, in this embodiment, there is also a positioning structure including a positioning protrusion 34 and a positioning groove 35, where one of the positioning protrusion 34 and the positioning groove 35 is disposed on the conductive block 33, and the other is disposed on the contact bridge. Specifically, as shown in fig. 6B, two positioning protrusions 34 are disposed on each contact bridge, and a positioning groove 35 is formed in the conductive block 33, so as to position the contact bridge and the conductive block 33. Of course, as a variant embodiment, the positioning projections 34 may be provided on the conductive block 33 and the positioning grooves 35 on the contact bridge. In addition to this, there are other variants, for example a number of positioning projections 34, a number of positioning grooves 35 of two, or a positioning between the conductive block 33 and only one contact bridge.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (10)

1. A contact bridge assembly with good current-carrying performance comprises a first contact bridge and a second contact bridge which are made of conductive materials, wherein the first contact bridge is positioned above the second contact bridge; the first contact bridge and the second contact bridge both comprise a body part and an end part positioned at one end of the body part, and the end parts of the first contact bridge and the second contact bridge can be used for the entry of the static contact; the method is characterized in that: and a conductive block is arranged between the body parts of the two contact bridges and is propped against the body parts of the two contact bridges to form electric connection.

2. The contact bridge assembly of claim 1, wherein: the thickness of the conductive block is larger than that of the first contact bridge or/and the second contact bridge, and the thickness of the conductive block is not larger than 7 times of that of any contact bridge.

3. The contact bridge assembly of claim 1, wherein: the body part of the first contact bridge and/or the body part of the second contact bridge is/are welded or screwed or riveted with the conductive block.

4. The contact bridge assembly of claim 1, wherein: the body part of the first contact bridge is connected with the body part of the second contact bridge at one position; the body part of the first contact bridge and the body part of the second contact bridge are welded or screwed or riveted on other sides, or the body part of the first contact bridge and the body part of the second contact bridge are welded or screwed or riveted on other sides with the conductive block.

5. The contact bridge assembly of claim 1, wherein: the body part of the first contact bridge is provided with a first bending part, and the body part of the second contact bridge is provided with a second bending part; the first bending part is lapped on the second contact bridge and/or the surface of the conductive block adjacent to the second contact bridge, and the second bending part is lapped on the first contact bridge and/or the surface of the conductive block adjacent to the first contact bridge.

6. The contact bridge assembly of claim 1, wherein: the conductive block is formed by stacking at least two conductive sheets; or, the conductive block is an integral piece.

7. The contact bridge assembly of claim 1, wherein: the distance between the two contact bridge end parts is smaller than the distance between the two contact bridge body parts.

8. The contact bridge assembly of claim 1, wherein: the positioning device also comprises a positioning protrusion and a positioning groove, wherein one of the positioning protrusion and the positioning groove is arranged on the conductive block, and the other one is arranged on any contact bridge or two contact bridges.

9. The isolating switch comprises an operation unit layer and at least two layers of switch unit layers which are arranged in a stacked manner, wherein a movable contact assembly and a fixed contact are arranged in the switch unit layers, and the operation unit layer is used for controlling the movement of the movable contact assembly in the switch unit layers so as to realize connection/disconnection with the fixed contact; the method is characterized in that: the movable contact assembly comprises the contact bridge assembly with good current carrying performance according to any one of claims 1 to 8.

10. A power supply system comprising a direct current source and a power conversion unit; the method is characterized in that: further comprising a disconnector according to claim 9 for controlling the switching on and off of the direct current source and the power conversion unit.