Load switch isolation structure
By using the design of zero-sequence current transformer and isolation bracket in the load switch, the problem of instability of the isolation components of the existing load switch is solved, the reliability and stability of the isolation effect are achieved, the cost is reduced, the scope of application is expanded, and the overall working current capacity and installation convenience are improved.
Patent Information
- Application Number
- CN202422628293.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2034-10-30
AI Technical Summary
The isolation components of existing load switches often use silicone sleeves or insulating tape, which have unstable isolation effects, complex structures, inconvenient installation, and high costs.
A load switch isolation structure is designed, which adopts a zero-sequence current transformer and an isolation bracket. By setting through holes and blocking parts on the isolation bracket, stable isolation of the neutral wire component and the live wire component is achieved, solid conduction contact is reduced, the isolation effect is enhanced, and the connection strength is improved through the snap-on and bump structures.
It achieves reliable stability of isolation effect and convenient installation, reduces the use cost, expands the scope of application, and improves the overall working current capacity and use reliability.
Smart Images
Figure CN223333662U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of load switches, in particular to a load switch isolation structure. Background Art
[0002] The load switch controls the circuit through manual or automatic operation, and can cut off the rated load current and a certain overload current. Among them, the isolation component that isolates the neutral wire from the live wire is a relatively key component. At present, the isolation component conventionally uses silicone sleeves or insulating tape to achieve isolation between the two, but the isolation effect cannot meet the requirements of use.
[0003] Therefore, there is a need for a load switch isolation structure that can achieve a stable isolation gap, a reliable and stable isolation effect, a simple structure, convenient installation, and low use cost. Summary of the Invention
[0004] In order to overcome the deficiencies of the prior art, the utility model provides a load switch isolation structure.
[0005] The technical solution of this utility model is as follows:
[0006] A load switch isolation structure is used for a load switch, the load switch includes a neutral wire assembly and a live wire assembly, the live wire assembly includes a second connecting plate, the neutral wire assembly includes a third connecting plate, the load switch isolation structure includes a zero-sequence current transformer and an isolation bracket arranged in the middle of the zero-sequence current transformer, the isolation bracket is provided with a first through hole, and a second through hole and a third through hole are respectively provided on both sides of the first through hole, the second connecting plate passes through the second through hole, and the third connecting plate passes through the third through hole.
[0007] As a further improvement of the present invention, the second through hole and / or the third through hole is a half hole.
[0008] As a further improvement of the present invention, the second through hole and the third through hole are symmetrically arranged around the center of the first through hole.
[0009] As a further improvement of the present invention, the first through hole is in a strip shape; one long side of the first through hole corresponds to the second through hole, and the other long side of the first through hole corresponds to the third through hole.
[0010] As a further improvement of the present invention, the short side of the first through hole is provided with an opening.
[0011] As a further improvement of the present invention, the first end of the isolation bracket is provided with a blocking portion extending away from the first through hole, and the blocking portion restricts the first end from passing through the zero-sequence current transformer.
[0012] As a further improvement of the present invention, there are multiple blocking parts.
[0013] As a further improvement of the present invention, the second end of the isolation bracket is provided with at least a first limiting portion, and the second connecting plate and / or the third connecting plate is provided with a second limiting portion, and the first limiting portion corresponds to the second limiting portion one by one.
[0014] As a further improvement of the present invention, the first limiting portion is a buckle, and the second limiting portion is a protrusion.
[0015] As a further improvement of the present invention, the second end is flush with a surface of the zero-sequence current transformer close to the first limiting portion or exceeds the zero-sequence current transformer.
[0016] According to the utility model of the above solution, the beneficial effects of the utility model are:
[0017] The utility model arranges the second connecting plate and the third connecting plate in the second through hole and the third through hole respectively, which can achieve a stable distance of the isolation gap between the second connecting plate and the third connecting plate, so that the isolation effect is reliable and stable, and by adding the first through hole, the contact between the neutral wire component and the live wire component through solid conduction can be reduced, further improving the reliability and stability of the isolation effect, and the overall structure is simple, easy to install, and low in cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a structural diagram of the utility model;
[0019] Figure 2 This is a schematic structural diagram of the first angle of the isolation bracket of the utility model;
[0020] Figure 3 This is a schematic structural diagram of the second angle of the isolation bracket of the utility model;
[0021] Figure 4 It is a structural schematic diagram of the second connecting plate of the utility model.
[0022] In the figure: 22, second connecting plate; 23, second limiting portion; 51, zero-sequence current transformer; 52, isolation bracket; 53, first through hole; 54, second through hole; 55, third through hole; 56, opening; 57, blocking portion; 58, first limiting portion; 61, third connecting plate. DETAILED DESCRIPTION
[0023] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.
[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0026] See also Figure 1 -4. The present invention provides a load switch isolation structure for a load switch. The load switch includes a neutral wire assembly and a live wire assembly. The live wire assembly includes a second connecting plate 22, and the neutral wire assembly includes a third connecting plate 61. The load switch isolation structure includes a zero-sequence current transformer 51 and an isolation bracket 52 arranged in the middle of the zero-sequence current transformer 51. The isolation bracket 52 is provided with a first through hole 53. A second through hole 54 and a third through hole 55 are respectively provided on both sides of the first through hole 53. The second connecting plate 22 passes through the second through hole 54, and the third connecting plate 61 passes through the second through hole 54. Through the third through hole 55, the utility model arranges the second connecting plate 22 and the third connecting plate 61 in the second through hole 54 and the third through hole 55 respectively, which can achieve the stability of the distance of the isolation gap between the second connecting plate 22 and the third connecting plate 61, so that the overall creepage distance is stable, and the reliability and stability of the isolation effect are improved. By adding the first through hole 53, the contact between the neutral wire component and the live wire component through solid conduction can be reduced, further improving the reliability and stability of the isolation effect. The overall structure is simple, the installation is convenient, and the use cost is low.
[0027] As an embodiment of the present invention, the second through hole 54 and the third through hole 55 can adopt the following two structures:
[0028] Structure 1: The second through hole 54 and the third through hole 55 are both full holes. During installation, the second connecting plate 22 and the third connecting plate 61 can be inserted into the second through hole 54 and the third through hole 55 in advance. After the second connecting plate 22 and the third connecting plate 61 are assembled with the isolation bracket 52, they are inserted into the zero-sequence current transformer 51 as a whole to complete the assembly;
[0029] Structure 2: The second through hole 54 and / or the third through hole 55 are half holes. Preferably, the second through hole 54 and the third through hole 55 are both half holes. During installation, the second connecting plate 22 and the third connecting plate 61 are preferentially inserted into the zero-sequence current transformer 51, and then the isolation bracket 52 is inserted into the zero-sequence current transformer 51. Finally, the second connecting plate 22 and the third connecting plate 61 are adjusted according to the positions of the second through hole 54 and the third through hole 55 on the isolation bracket 52 to complete the assembly.
[0030] The present invention adopts structure 2. Compared with structure 1, structure 2 can reduce half of the hole wall occupation of the second through hole 54 and the third through hole 55, and convert it into the occupied space of the second through hole 54 and the third through hole 55, effectively expanding the second through hole 54 and the third through hole 55, so that the thickness of the second connecting plate 22 and the third connecting plate 61 allowed to pass through the second through hole 54 and the third through hole 55 is increased, which can effectively increase the overall allowable working current and the overall scope of application, or expand the first through hole 53, so that the interval between the second connecting plate 22 and the third connecting plate 61 becomes larger, thereby improving the isolation effect.
[0031] As an embodiment of the present utility model, the second through hole 54 and the third through hole 55 are symmetrically arranged with respect to the center of the first through hole 53, so that the second through hole 54 and the third through hole 55 can be separated by the farthest distance within the limited space of the isolation bracket 52, thereby ensuring the isolation distance between the second connecting plate 22 and the third connecting plate 61 and improving the isolation effect.
[0032] As an embodiment of the present invention, the first through hole 53 is in the shape of an elongated strip; one long side of the first through hole 53 corresponds to the second through hole 54, and the other long side of the first through hole 53 corresponds to the third through hole 55, which can increase the space between the second through hole 54 and the third through hole 55 as much as possible, so that the thickness of the second connecting plate 22 and the third connecting plate 61 allowed to pass through the second through hole 54 and the third through hole 55 is increased, which can effectively increase the overall allowable working current and improve the overall scope of application.
[0033] As an embodiment of the present invention, an opening 56 is provided on a short side of the first through hole 53 , which can increase the creepage distance between the second connecting plate 22 and the third connecting plate 61 .
[0034] As an embodiment of the present utility model, the first end of the isolation bracket 52 is provided with a blocking portion 57 extending away from the first through hole 53. The blocking portion 57 limits the first end from passing through the zero-sequence current transformer 51. When the isolation bracket 52 is inserted into the zero-sequence current transformer 51 to complete the assembly, the second end of the isolation bracket 52 is preferentially inserted into the zero-sequence current transformer 51. As the isolation bracket 52 is inserted, when the blocking portion 57 contacts the zero-sequence current transformer 51, since the size of the blocking portion 57 is larger than the internal size of the zero-sequence current transformer 51, the blocking portion 57 cannot pass through the zero-sequence current transformer 51, thereby realizing the positioning of the isolation bracket 52 and the zero-sequence current transformer 51 and improving the coordination between the isolation bracket 52 and the zero-sequence current transformer 51.
[0035] As an embodiment of the present invention, there are multiple blocking parts 57. As the use time increases, the blocking parts 57 will be damaged to a greater or lesser extent. The use of multiple blocking parts 57 can prevent the loss of positioning function of the isolation bracket 52 and the zero-sequence current transformer 51 when a certain blocking part 57 is damaged, causing unnecessary impact on the overall isolation effect. Preferably, the multiple blocking parts 57 are evenly arranged, which can make each blocking part 57 evenly stressed, thereby improving the service life of the blocking part 57.
[0036] As an embodiment of the present utility model, the second end of the isolation bracket 52 is provided with at least a first limiting portion 58, and the second limiting portion 23 is provided on the second connecting plate 22 and / or the third connecting plate 61. The first limiting portion 58 corresponds to the second limiting portion 23 one by one. Preferably, the first limiting portion 58 is a snap buckle and the second limiting portion 23 is a protrusion. Through the cooperation of the snap buckle and the protrusion, when the isolation bracket 52 is inserted into the zero-sequence current transformer 51, the snap buckle is clamped on the protrusion, which can limit the isolation bracket 52 from being separated from the second connecting plate 22 or the third connecting plate 61, thereby avoiding the separation of the isolation bracket 52 and the zero-sequence current transformer 51, effectively improving the connection strength between the isolation bracket 52 and the zero-sequence current transformer 51, the second connecting plate 22, and the third connecting plate 61, and improving the overall reliability of use and working stability.
[0037] As an embodiment of the present utility model, the second end is flush with or exceeds the zero-sequence current transformer 51 on a side of the zero-sequence current transformer 51 close to the first limit portion 58, ensuring that the isolation bracket 52 can pass through the interior of the zero-sequence current transformer 51, thereby ensuring that the second connecting plate 22 and the third connecting plate 61 at each position inside the zero-sequence current transformer 51 are effectively isolated by an isolation bracket 52, thereby improving the overall reliability of use and working stability.
[0038] In summary, the present invention provides a load switch isolation structure, in which the second connecting plate 22 and the third connecting plate 61 are respectively arranged in the second through hole 54 and the third through hole 55, so that the distance of the isolation gap between the second connecting plate 22 and the third connecting plate 61 can be stabilized, so that the overall creepage distance is stable, and the reliability and stability of the isolation effect are improved. Moreover, by adding the first through hole 53, the contact between the neutral wire component and the live wire component through solid conduction can be reduced, so as to further improve the reliability and stability of the isolation effect. Moreover, the overall structure is simple, the installation is convenient, and the use cost is low. The second structure can reduce half of the hole wall occupied by the second through hole 54 and the third through hole 55, and convert it into the occupied space of the second through hole 54 and the third through hole 55, effectively expanding the second through hole 54 and the third through hole 55, so that the thickness of the second connecting plate 22 and the third connecting plate 61 allowed to pass through the second through hole 54 and the third through hole 55 is increased, which can effectively increase the overall allowable working current and improve the overall scope of application, or expand the first through hole 53 so that the second through hole 54 and the third through hole 55 are increased. The spacing between the connecting plate 22 and the third connecting plate 61 is increased, thereby improving the isolation effect; the blocking portion 57 cannot pass through the zero-sequence current transformer 51, thereby realizing the positioning of the isolation bracket 52 and the zero-sequence current transformer 51, thereby improving the cooperation between the isolation bracket 52 and the zero-sequence current transformer 51; the multiple blocking portions 57 are evenly arranged, thereby making the force of each blocking portion 57 uniform, thereby improving the service life of the blocking portion 57; the cooperation of the buckle and the protrusion can limit the isolation bracket 52 from being separated from the second connecting plate 22 or the third connecting plate 61, thereby preventing ... zero-sequence current transformer 51, thereby preventing the isolation bracket 52 from being separated from the zero-sequence current transformer 51, thereby preventing the isolation bracket 52 from being separated from the zero-sequence current transformer This avoids the separation of the isolation bracket 52 and the zero-sequence current transformer 51, effectively improves the connection strength between the isolation bracket 52 and the zero-sequence current transformer 51, the second connecting plate 22, and the third connecting plate 61, and improves the overall reliability and working stability; the isolation bracket 52 passes through the zero-sequence current transformer 51, and can ensure that the second connecting plate 22 and the third connecting plate 61 at each position inside the zero-sequence current transformer 51 are effectively isolated by the isolation bracket 52, thereby improving the overall reliability and working stability.
[0039] It should be emphasized that the above are only preferred embodiments of the present invention and do not constitute any form of limitation to the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.
Claims
1. A load switch isolation structure for a load switch, wherein the load switch comprises a neutral wire assembly and a live wire assembly, wherein the live wire assembly comprises a second connecting plate (22), and the neutral wire assembly comprises a third connecting plate (61), characterized in that: The load switch isolation structure comprises a zero-sequence current transformer (51) and an isolation bracket (52) arranged in the middle of the zero-sequence current transformer (51); a first through hole (53) is provided on the isolation bracket (52); a second through hole (54) and a third through hole (55) are respectively provided on both sides of the first through hole (53); the second connecting plate (22) passes through the second through hole (54); and the third connecting plate (61) passes through the third through hole (55).
2. The load switch isolation structure according to claim 1, characterized in that: The second through hole (54) and / or the third through hole (55) is a half hole.
3. The load switch isolation structure according to claim 1, characterized in that: The second through hole (54) and the third through hole (55) are symmetrically arranged around the center of the first through hole (53).
4. The load switch isolation structure according to claim 3, characterized in that: The first through hole (53) is in the shape of a long strip; one long side of the first through hole (53) corresponds to the second through hole (54), and the other long side of the first through hole (53) corresponds to the third through hole (55).
5. The load switch isolation structure according to claim 4, characterized in that: An opening (56) is provided on a short side of the first through hole (53).
6. The load switch isolation structure according to claim 1, characterized in that: The first end of the isolation bracket (52) is provided with a blocking portion (57) extending in a direction away from the first through hole (53), and the blocking portion (57) restricts the first end from passing through the zero-sequence current transformer (51).
7. The load switch isolation structure according to claim 6, characterized in that: There are multiple blocking parts (57).
8. The load switch isolation structure according to claim 1, characterized in that: The second end of the isolation bracket (52) is provided with at least a first limiting portion (58), and the second connecting plate (22) and / or the third connecting plate (61) are provided with a second limiting portion (23), and the first limiting portion (58) corresponds to the second limiting portion (23) one by one.
9. The load switch isolation structure according to claim 8, characterized in that: The first limiting portion (58) is a buckle, and the second limiting portion (23) is a protrusion.
10. The load switch isolation structure according to claim 9, characterized in that: The second end is flush with a surface of the zero-sequence current transformer (51) close to the first limiting portion (58) or exceeds the zero-sequence current transformer (51).