Static contact and arc extinguish chamber of disconnecting switch
By designing the static contacts of the overlapping structure and the arc extinguishing chamber that introduces narrow-slit channels, the problems of limited current carrying capacity and small current inability to extinguish in the low-voltage electrical field are solved, and higher current carrying capacity and better arc extinguishing effect are achieved.
Patent Information
- Application Number
- CN202421864329.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-02
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-08-02
AI Technical Summary
In the existing low-voltage electrical field, the current carrying capacity of DC switches and isolating switches is limited and the small current cannot be extinguished.
A combined static contact is designed to improve the current carrying capacity and heat dissipation of the static contact through a half-fold structure, and at the same time, a narrow slot channel is introduced into the arc extinguishing chamber to accelerate the arc extinguishing ability of the arc.
It improves the current carrying capacity and heat dissipation of the static contacts, solves the problem of small current inability to extinguish, and enhances the overall performance of the isolation switch.
Smart Images
Figure CN222966002U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of low-voltage electrical appliances, and specifically relates to an arc extinguishing chamber. Background Art
[0002] In the existing low-voltage electrical appliance field, the voltage that a DC switch can withstand can only reach DC1500V. According to the latest development requirements of the low-voltage electrical appliance industry, the current voltage that a DC switch needs to withstand will develop to AC2000V and DC3000V. In disconnectors, the current products can only reach single-pole DC750V and two-pole DC1500V at present, and various products cannot meet the standard requirements of DC2000V and DC2500V.
[0003] The static contact of the existing disconnector usually consists of a single static contact. According to the skin effect, most of the current is concentrated on the surface of the static contact piece, and the surface area of the static contact piece is limited. Therefore, the current-carrying capacity is limited. In order to improve the current-carrying capacity, it is necessary to increase the surface area of the static contact piece. Therefore, the current-carrying capacity is positively correlated with the surface area of the static contact piece. However, the installation space of the static contact is limited. Therefore, the space for increasing the surface area of the static contact piece is also limited. In the existing technology, it is very difficult to greatly improve the current-carrying capacity of the static contact piece. At the same time, for the existing disconnector, a clapper-type moving contact and a grid-type arc extinguishing chamber are generally adopted, and there is often a problem of critical current, resulting in the inability to extinguish small currents. Content of the Utility Model
[0004] The purpose of the utility model is to address the defects that the limited space for increasing the surface area of the static contact of the existing disconnector leads to limited current-carrying capacity and the inability to extinguish small currents. The utility model provides a static contact and an arc extinguishing chamber for a disconnector. The static contact is formed by overlapping, which improves the utilization rate of the contact material of the static contact. The entire static contact has a large current-carrying capacity, good heat dissipation, and low internal resistance. At the same time, the arc extinguishing chamber can accelerate the arc extinguishing ability through narrow slits, solving the problem of arc extinguishing for small current critical currents.
[0005] Technical Solution
[0006] To achieve the above technical purpose, the utility model provides a static contact for a disconnector, which is characterized in that: it includes a static contact body, and the static contact body includes an installation part, a connection part, and a contact head part. The static contact body is a folded structure formed by folding a whole static contact piece at one end of the installation part. Among the folded static contact bodies, at least two static contact pieces in the installation part are closely attached, and there is a gap between at least two static contact pieces in the contact head part.
[0007] In one of the embodiments, the connection part includes a connection part one and a connection part two that are perpendicular to each other. The connection part one is connected to the installation part, and the connection part two is connected to the contact head part.
[0008] In one embodiment, there is a folding angle between the first connecting part and the mounting part.
[0009] In one embodiment, at least one of the static contact pieces in at least two of the touch head parts protrudes or concaves to form a gap.
[0010] In one embodiment, the touch head part is U-shaped.
[0011] In one embodiment, there is at least one positioning hole on the surface of the static contact head body.
[0012] The present utility model also provides an arc extinguishing chamber for a disconnector, characterized in that: the arc extinguishing chamber includes an arc extinguishing grid plate group, both side ends of the arc extinguishing grid plate group are fixed on an insulating member, a middle insulator is arranged between the insulating members to form a narrow slit channel with the insulating members, and one end of the middle insulator is inserted into the gap on the above-mentioned touch head part.
[0013] In one embodiment, the middle insulator forms two chambers in the arc extinguishing chamber, and a moving contact extends into the arc extinguishing chamber.
[0014] In one embodiment, the middle insulator is integral or split.
[0015] Beneficial effects
[0016] The present utility model provides a static contact for a disconnector, which includes a static contact head body. The static contact head body includes a mounting part, a connecting part and a touch head part. The static contact head body is a folded structure formed by folding a whole static contact piece in half at one end of the mounting part. At least two static contact pieces in the mounting part are closely attached to each other in the folded static contact head body, and there is a gap between at least two static contact pieces in the touch head part. The static contact is formed by folding and closing, which improves the utilization rate of the contact material of the static contact. The whole static contact has a large current-carrying capacity, good heat dissipation and small internal resistance. At the same time, the arc extinguishing chamber can accelerate the arc extinguishing ability through the narrow slit, so as to solve the problem of arc extinguishing for the critical current of small current. Description of the drawings
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.
[0018] Attached Figure 1 is a schematic diagram of the structure of the static contact in the embodiment of the present utility model;
[0019] Attached Figure 2It is a schematic diagram of the expansion of the static contact in the embodiment of the present utility model;
[0020] Appendix Figure 3 It is a schematic diagram of the contact system and the arc extinguishing chamber structure in the embodiment of the present utility model;
[0021] Appendix Figure 4 It is a schematic diagram of the installation of the intermediate insulator in the embodiment of the present utility model; Detailed implementation manners
[0022] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.
[0023] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or there can also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the description of the present application are only for the purpose of illustration and do not represent the only implementation manners.
[0024] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.
[0025] In the present application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature can be that the first feature is in direct contact with the second feature, or the first feature and the second feature are in contact indirectly through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature has a lower horizontal height than the second feature.
[0026] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the related listed items.
[0027] Embodiment
[0028] The existing static contact surface area of the disconnecting switch has limited space for increase, resulting in limited current-carrying capacity and inability to extinguish small currents. To solve this problem, as shown in the appendix Figure 1 shown, this embodiment provides a static contact of a disconnecting switch, which is characterized in that: it includes a static contact body a, and the static contact body a includes a mounting part a1, a connecting part a2 and a contact part a3. The static contact body a is a folded structure formed by folding a whole static contact piece shown in the appendix Figure 2 shown, with one end of the mounting part a1. Among the static contact pieces formed by folding, at least two static contact pieces in the mounting part a1 are closely attached, and there is a gap a301 between at least two static contact pieces in the contact part a3. Specifically, the static contact body a is folded with a material that is half the thickness of the conventionally used material in the prior art, so as to form a static contact body a composed of at least two stacked static contact pieces. Among them, there is a gap a301 between the two static contact pieces, which can be used to clamp the moving contact or the intermediate insulator.
[0029] The mounting part a1, the connecting part a2 and the contact part a3 are formed by bending. As shown in the appendix Figure 1 shown, the connecting part a2 includes a connecting part one a201 and a connecting part two a202 that are perpendicular to each other. The connecting part one a201 is connected to the mounting part a1, and the connecting part two a202 is connected to the contact part a3. There is a folding angle A between the connecting part one a201 and the mounting part a1. At least one of the at least two static contact pieces in the contact part a3 protrudes or concaves to form a gap a301. The contact part a3 is U-shaped. There is at least one positioning hole a4 on the surface of the static contact body a. The static contact is formed by stacking, which improves the utilization rate of the contact material of the static contact. The whole static contact has a large current-carrying capacity, good heat dissipation and small internal resistance.
[0030] As shown in the appendix Figure 3 and 4As shown in the figure, this embodiment also provides an arc extinguishing chamber for a disconnector. The arc extinguishing chamber b includes an arc extinguishing grid group b01. Both ends of the arc extinguishing grid group b01 are fixed on insulating members b02 and b02'. An intermediate insulator b03 is placed between the insulating members b02 and b02' to form narrow slit channels c and c' with the insulating members b02 and b02'. One end of the intermediate insulator b03 is inserted into the gap a301 on the above-mentioned contact head a3. The intermediate insulator b03 divides the arc extinguishing chamber b into two chambers, and a moving contact d extends into the arc extinguishing chamber b. Both sides of the arc extinguishing chamber are isolated by gas generating parts e. The intermediate insulator b03 is integral or split. When the moving contact d moves in the narrow slit channels c and c', the arc is affected by the narrow slit channels c and c'. Even if the electromagnetic force formed by a small current is not strong, it will quickly run into the arc extinguishing chamber b. Therefore, the problem of arc extinguishing at the critical current of a small current can be solved.
[0031] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.
[0032] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.
Claims
1. A static contact of an isolating switch, characterized in that : It comprises a stationary contact body (a), wherein the stationary contact body (a) comprises a mounting portion (a1), a connecting portion (a2) and a contact portion (a3), wherein the stationary contact body (a) is a folded structure formed by folding an integral stationary contact piece at one end of the mounting portion (a1), wherein at least two stationary contact pieces in the mounting portion (a1) of the folded stationary contact body (a) are tightly fitted, and at least a gap (a301) exists between two stationary contact pieces in the contact portion (a3).
2. A static contact of an isolating switch as claimed in claim 1, characterized in that :The connecting portion (a2) includes a connecting portion 1 (a201) and a connecting portion 2 (a202) which are perpendicular to each other, wherein the connecting portion 1 (a201) is connected to the mounting portion (a1), and the connecting portion 2 (a202) is connected to the contact portion (a3).
3. A static contact of an isolating switch as claimed in claim 2, characterized in that : There is a folding angle (A) between the connecting portion 1 (a201) and the mounting portion (a1).
4. A static contact of an isolating switch as claimed in claim 1, characterized in that : At least one of the at least two static contact pieces in the contact part (a3) is convex or concave to form a gap (a301).
5. A static contact of an isolating switch as claimed in claim 1, characterized in that :The contact part (a3) is U-shaped.
6. A static contact of an isolating switch as claimed in claim 1, characterized in that : The surface of the stationary contact body (a) has at least one positioning hole (a4).
7. An arc extinguishing chamber of an isolating switch, characterized in that: The arc extinguishing chamber (b) comprises an arc extinguishing grid group (b01), both side ends of the arc extinguishing grid group (b01) are fixed on insulating parts (b02, b02'), an intermediate insulator (b03) is arranged between the insulating parts (b02, b02') to form a narrow slit channel (c, c') with the insulating parts (b02, b02'), and one end of the intermediate insulator (b03) is inserted into the gap (a301) on the contact part (a3) described in any one of claims 1 to 6 above.
8. The arc extinguishing chamber of the disconnector according to claim 7, characterized in that: The intermediate insulator (b03) forms the arc extinguishing chamber (b) into two chambers, and the moving contact (d) extends into the arc extinguishing chamber (b).
9. The arc extinguishing chamber of the disconnector according to claim 7, characterized in that: The intermediate insulator (b03) is either one-piece or split.