A fully sealed disconnector

Abstract

The application discloses a kind of full sealing isolator, including first insulating column and second insulating column, one end face of the first insulating column is formed with a containing cavity, incoming terminal is by the outside of first insulating column and enters the containing cavity, the second insulating column is fixed with outgoing terminal, one end of the outgoing terminal is led out by the second insulating column, the other end can enter containing cavity, and incoming terminal is realized electrically conductive contact.This device seals the electrically conductive part of isolator in the interior of insulating shell, avoids the pollution of electrically conductive body by environment, to prevent the condition that influences the normal operation of circuit.

Description

Technical Field

[0001] This invention belongs to the field of power distribution technology, and specifically relates to a fully sealed disconnect switch. Background Technology

[0002] Disconnect switches are suitable for installation on outdoor high-voltage power distribution lines. They are mainly used in conjunction with circuit breakers or load switches to provide a visible break, improving the safety of equipment operation and maintenance. Operation is performed using an operating lever when there is voltage but no load. Normally, the terminals and blades of disconnect switches are completely exposed to the air. Therefore, disconnect switches with large exposed conductive areas are susceptible to environmental influences, corrosion, and operational inconvenience. Furthermore, falling debris or tree branches touching the exposed conductive parts can easily cause short circuits. Frequent power outages caused by various foreign objects can seriously disrupt people's normal production and lives. Summary of the Invention

[0003] The purpose of this invention is to solve the problems existing in the prior art and provide a fully sealed disconnecting switch. This device seals all conductive parts of the disconnecting switch inside an insulating shell to prevent the conductor from being contaminated by the environment, thereby preventing situations that affect the normal operation of the circuit.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a fully sealed disconnect switch, comprising a first insulating post and a second insulating post, wherein a receiving cavity is formed on one end face of the first insulating post, and an incoming terminal extends into the receiving cavity from the outside of the first insulating post; an outgoing terminal is fixedly disposed on the second insulating post, wherein one end of the outgoing terminal is led outward from the second insulating post, and the other end of the outgoing terminal can extend into the receiving cavity to achieve conductive contact with the incoming terminal.

[0005] As a preferred embodiment, the cavity is provided with a conductive contact connected to the inlet terminal, and the outlet terminal is provided with a locking head at one rotatable end. A locking groove is provided on the mating surface of the conductive contact and the locking head.

[0006] As a preferred embodiment, it also includes an isolation blade, one end of which is rotatably mounted on the outgoing terminal, and the other end is used to fix the rotatable end of the outgoing terminal and drive it to rotate, so as to achieve conductive connection or disconnection with the incoming terminal.

[0007] As a preferred embodiment, an insulating plug is provided at the end of the outgoing terminal near the card head to seal the port of the receiving chamber.

[0008] As a preferred embodiment, a stepped hole is provided at the lower port of the receiving cavity.

[0009] As a preferred embodiment, the outgoing terminal includes a flexible conductive section, one end of which serves as a locking head that engages with the slot, and the other end serves as an external connecting plate that extends outward from the second insulating post.

[0010] As a preferred embodiment, the middle section of the outgoing terminal is covered with an insulating layer, and the two ends of the outgoing terminal are exposed by the insulating layer and respectively covered with metal sleeves to form a clip and an outer connecting plate.

[0011] As a preferred embodiment, the system also includes a limiting component, which includes a first limiting member and a second limiting member. The first limiting member is fixed on the first insulating post, and the second limiting member is fixed on the isolation blade. When the input terminal and the output terminal are electrically connected, the first limiting member and the second limiting member are engaged to prevent the input and output terminals from detaching at will.

[0012] As a preferred embodiment, both the first insulating post and the second insulating post are provided with alternating umbrella skirt structures of different sizes along their axial direction.

[0013] The present invention has at least the following beneficial effects: Firstly, this solution improves upon existing methods by die-casting a groove into the second insulating post, fixing one end of the outgoing terminal within the groove to prevent interference with normal circuit operation. One end of the incoming terminal extends into the receiving cavity of the first insulating post, and a conductive contact is installed within the receiving cavity, ensuring that most of the conductive portion is located within the insulating post, thereby preventing environmental contamination of the incoming and outgoing terminals. Simultaneously, the conductive flexible connection of the outgoing terminal is covered by an insulating layer.

[0014] Secondly, in this solution, a slot is provided on the mating surface of the conductive contact, and a locking head that mates with the slot is provided on the first conductive end of the conductive flexible connection. When the isolating switch is in the closed position, the locking head enters the receiving cavity and makes conductive connection with the slot, thereby achieving closure. At this time, the locking head is placed in the receiving cavity, and the port of the receiving cavity is sealed by an insulating plug, thereby sealing the entire conductive connection part of the isolating switch inside the insulating column, avoiding environmental contamination of the conductor and preventing situations that affect the normal operation of the circuit. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is an overall structural diagram of the isolating switch of the present invention: the switch is closed; Figure 2This is a schematic diagram of the disconnecting switch of the present invention. Figure 3 This is a perspective view of the disconnecting switch of the present invention; Figure 4 This is a perspective view of the inlet end support column of the present invention; Figure 5 This is a schematic diagram showing the connection between the incoming terminal and the conductive contact in this invention; Figure 6 Cross-section of the first insulating column Figure 1 ; Figure 7 Cross-section of the first insulating column Figure 2 ; Figure 8 This is a structural diagram of the second insulating column; Figure 9 This is a partial structural diagram of the second limiting component; Figure 10 A structural diagram of an isolating switch according to another embodiment; Markings in the diagram: 1. First insulating post; 11. Receiving cavity; 12. Stepped hole; 13. First umbrella skirt; 14. Second umbrella skirt; 2. Second insulating post; 21. Screw hole; 3. Conductive contact; 31. Slot; 311. Snap-fit ​​part; 312. Guide slope; 32. Connecting groove; 33. Screw; 4. Inlet terminal; 41. Inlet part; 42. Connector; 5. Outlet terminal; 51. Clip; 52. Flexible connection section; 53. Outer connecting plate; 54. Insulating plug; 7. Isolation 71. Isolation knife, 72. Rotating component of isolation knife, 721. Rotating plate, 722. Fastener, 8. Limiting component, 81. First limiting component, 811. Fixed seat, 812. Hook one, 82. Second limiting component, 821. Groove, 822. Hook two, 823. Hook hole, 9. Base, 10. Insulating rotating component, 101. Connecting column, 102. Rotating sleeve, 1021. Rotating arm, 1022. Sleeve, 1023. Fixed head, 103. Rotating shaft. Detailed Implementation

[0017] The present invention will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0018] It should be noted that, unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "a," "an," or "the," and similar words used in the specification and claims of this patent application do not express a limitation of quantity, but rather indicate the presence of at least one. Terms such as "comprising" or "including" indicate that the elements or objects preceding "comprising" encompass the elements or objects listed following "comprising" or "including" and their equivalents, but do not exclude other elements or objects having the same function.

[0019] As shown in the figure, this solution discloses a fully sealed disconnect switch, including an inlet support and an outlet support. The inlet support serves as a first insulating post 1, and the outlet support serves as a second insulating post 2. The inlet and outlet supports are arranged in parallel, and both are fixed to a base 9 at the same end. Screw holes 21 are provided on both the inlet and outlet supports, and the inlet and outlet supports are fixed to the base 9 by screws into the screw holes 21. A cylindrical receiving cavity 11 is formed at the other end of the inlet support. The inlet terminal 4 extends into the cavity 11 from the outside. The outlet end of the outlet terminal 5 is fixed by silicone injection and led outward from the outlet support. The other end of the outlet terminal 5 is rotatable. The rotatable end of the outlet terminal 5 can extend into the receiving cavity 11 and make conductive contact with the inlet terminal 4, or it can exit the receiving cavity 11 and disconnect from the inlet terminal 4.

[0020] In this design, the output terminal 5 uses metal braided wire, such as copper braided wire. The output terminal 5 is covered with an insulating layer, and both ends of the output terminal 5 are exposed outward from the insulating layer. The metal braided wire at both ends of the output terminal 5 is wrapped with a metal sleeve, giving both ends a rigid outer shell. Thus, one end of the output terminal 5 is set as an external connecting plate 53, and the other end is set as a clip 51. Between the clip 51 and the external connecting plate 53 is a flexible connecting section 52. The flexible connecting section 52 allows the output terminal to adapt and change its shape as the switch is opened and closed. The end of the output terminal 5 closest to the external connecting plate 53 is pressed into a groove on the output end support by insulating material. A fastening screw 531 is provided on the part of the external connecting plate 53 exposed by the output terminal 5.

[0021] In this design, an insulating plug 54 is provided on the outgoing terminal 5 near the end of the card head 51. The function of the insulating plug 54 is to cooperate with the receiving cavity 11 so that when the switch is closed, the outgoing terminal 5 and the incoming terminal 4 make conductive contact. The insulating plug 54 seals the port of the receiving cavity 11, thereby forming a sealed space inside the receiving cavity 11, isolating it from the external environment and preventing it from being affected by the external environment.

[0022] In this embodiment, an isolation blade 7 is also provided. The isolation blade 7 can adopt the following structure: The isolation blade 7 includes a fixed post 71 and an isolation blade rotating component 72. One end of the fixed post 71 is fixed to the insulating post at the outlet end, and the other end of the fixed post 71 is an exposed part with a rotating hole. The isolation blade rotating component 72 includes two parallel rotating plates 721 and fasteners 722 for fixing the two rotating plates 721. The fasteners 722 can be fastening bolts, which pass through the connecting holes of the rotating plates 721, so that the two rotating plates 721 are firmly fixed. The fastening bolts located at the ends of the rotating plates 721 also pass through the limiting component 8, thereby fixing the second limiting component 82. The rotating plates 721 are connected by the fasteners 722 to form an integral part, and the hinged ends of the two rotating plates 721 are clamped at the rotating hole of the fixed post 71 and rotatably connected to it through a rotating shaft.

[0023] In this embodiment, one end of the clip 51 of the outgoing terminal 5 is fixed on the isolating blade 7, and the insulating plug 54 is located on the side of the isolating blade 7 that rotates in the direction of switch closure. A stepped hole 12 can also be provided at the port of the receiving cavity 11, wherein the inner diameter of the port of the stepped hole 12 is larger than the inner diameter of the receiving cavity. Thus, when the isolating switch is closed, the outer diameter of the insulating plug 54 is larger than the inner diameter of the receiving cavity 11 and smaller than the outer diameter of the stepped hole 12. The insulating plug 54 is used to seal the stepped hole 12, and the deformation of the insulating plug 54 further presses and seals the receiving cavity 11.

[0024] In this embodiment, an insulating rotating component 10 can also be provided. The insulating rotating component 10 can replace the isolation blade 7 mentioned above and will have better effects. Specifically, the insulating rotating component 10 includes a connecting post 101 and a rotating sleeve 102. One end of the connecting post 101 is fixed to the insulating post at the outlet end, which is essentially the same as the setting method of the fixed post 71 mentioned above. The other end of the connecting post 101 is an exposed part and is provided with a rotating hole. The rotating sleeve 102 includes a rotating arm 1021, a sleeve 1022 and a fixing head 1023. The rotating arm 1021, the sleeve 1022 and the fixing head 1023 are integrally set and connected in sequence. The rotating arm 1021 has an L-shaped structure, and the corner of the rotating arm 1021 points away from the outlet. The structure of the rotating arm 1021 is more reasonable on one side of the terminal 5, avoiding interference between the rotating arm 1021 and the corner of the terminal 5 during rotation. The hinge end of the rotating arm 1021 is installed at the rotating hole of the connecting column 101 and is rotatably connected through the rotating shaft 103. The sleeve 1022 is a hollow tube, in which the flexible connection section 52 of the terminal 5 passes through the sleeve 1022 and exits from the other end of the sleeve 1022. The sleeve 1022 holds the conductive flexible connection of the terminal 5 in the cavity of the rotating part, thus protecting the terminal 5. The flexible connection section 52 of the terminal 5 at the corresponding position of the rotating arm 1021 is exposed outward from the sleeve 1022 to accommodate the rotation of the insulating rotating part 10. The fixing head 1023 is used to fix one end of the clamp 51 of the outgoing terminal 5, and to fix the limiting component 8 and the insulating plug 54. The insulating rotating component 10 can also further improve the appearance, making the overall structure of the disconnecting switch more compact and the space design more reasonable.

[0025] In this design, the input terminal 4 enters the receiving cavity 11 from outside the input end support and is fixedly connected to the conductive contact 3 inside the receiving cavity 11. The input terminal 4 and the conductive contact 3 can adopt the following structure: The input terminal 4 includes an input part 41 and a connector 42. The input terminal 4 can be a copper busbar, wherein the input part 41 is a flat copper plate, and the connector 42 is located on the end face of the input part 41 located in the receiving cavity 11. The conductive contact 3 has an overall cuboid structure. A connecting groove 32 is provided on the corresponding end face of the conductive contact 3 that connects with the connector 42. The connector 42 extends into the connecting groove 32 and is fixed by a screw 33. A transverse through slot 31 is provided on the corresponding end face of the conductive contact 3 that connects with the card head 51. The slot 31 includes a snap-fit ​​part 311, which has a structure that is wider inside and narrower outside. This design allows the card head 51 to have a certain clamping force after entering the snap-fit ​​part 311, making it difficult for it to fall out. A guide slope 312 is provided on the outside of the snap-fit ​​part 311. The function of the guide slope 312 is to facilitate the guide of the card head 51 into the snap-fit ​​part 311.

[0026] This embodiment also includes a limiting component 8, which includes a first limiting component 81 and a second limiting component 82. The first limiting component 81 includes an arc-shaped fixing seat 811 fixedly connected to the support column at the inlet end and a hook 812. The hook 812 is installed on the arc-shaped fixing seat 811 by screws. The second limiting component 82 is fixed at the end of the isolating knife 7 away from the second insulating post 2. The second limiting component 82 includes a groove 821 and a hook 822. The hook 822 is located in the groove 821 and fixed between the two rotating plates 721 of the isolating knife 7. When the isolating switch is closed electrically, the hook 812 and the hook 822 are engaged, thereby preventing the clamp 51 from being arbitrarily dislodged from the clamp slot 31. Furthermore, a hook hole 823 is provided outside the groove 821 of the second limiting component 82. The function of the hook hole 823 is to facilitate the hook at the top of the operating rod to extend into the hook hole 823 for engagement when the operator closes or opens the isolating switch by operating the rod.

[0027] In this design, the first insulating post 1 and the second insulating post 2 are provided with alternating large and small umbrella skirts along their axial direction. Taking the first insulating post 1 as an example, the outer cylindrical surface of the first insulating post 1 is provided with a first umbrella skirt 13 and a second umbrella skirt 14, wherein the outer diameter of the first umbrella skirt 13 is larger than the outer diameter of the second umbrella skirt 14, and the first umbrella skirt 13 and the second umbrella skirt 14 are arranged alternately. This design can further increase the creepage distance.

[0028] In this embodiment, the external connection end of the inlet terminal 4 is provided with a wire clamping screw. After the external connection end of the inlet terminal 4 is connected to the external cable, the exposed part is sealed with thermoplastic insulating material. The copper sleeve of the external connection end of the outlet terminal 5 is provided with a wire clamping screw. Similarly, after being connected to the external cable, the exposed part is sealed with thermoplastic insulating material. In this way, the entire exposed part of the disconnecting switch can be completely enclosed. Therefore, after the improvement of this solution, the entire exposed part of the original disconnecting switch can be sealed in a sealed cavity or insulating material layer, thereby effectively avoiding the conductor from being contaminated and affected by the environment and debris.

[0029] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A fully sealed disconnect switch, characterized in that: It includes a first insulating post and a second insulating post. One end face of the first insulating post forms a receiving cavity. The incoming terminal extends into the receiving cavity from the outside of the first insulating post. The second insulating post is fixedly provided with an outgoing terminal. One end of the outgoing terminal is led out from the second insulating post, and the other end of the outgoing terminal can extend into the receiving cavity to achieve conductive contact with the incoming terminal. The cavity contains a conductive contact connected to the inlet terminal. The rotatable end of the outlet terminal has a locking head, and a groove is provided on the mating surface of the conductive contact corresponding to the locking head. An insulating plug is provided at the end of the outlet terminal near the locking head to seal the port of the cavity. The outlet terminal includes a flexible conductive section, one end of which serves as the locking head and engages with the groove, while the other end extends outward from the second insulating post as an external connecting plate. The middle section of the outlet terminal is covered with an insulating layer, and both ends of the outlet terminal are... The insulation layer is exposed and covered with metal sleeves to form the clip and the outer connecting plate, respectively. A stepped hole is provided at the lower port of the receiving cavity, wherein the inner diameter of the stepped hole port is larger than the inner diameter of the receiving cavity, and the outer diameter of the insulating plug is larger than the inner diameter of the receiving cavity but smaller than the outer diameter of the stepped hole. The insulating plug fits and seals at the stepped hole, and the deformation of the insulating plug further compresses and seals the receiving cavity. When the switch is closed, the outgoing terminal and the incoming terminal make conductive contact, and the insulating plug seals the port of the receiving cavity, thereby forming a sealed space inside the receiving cavity and isolating it from the external environment. It also includes an insulating rotating component, which includes a connecting post and a rotating sleeve. One end of the connecting post is fixed to a second insulating post, and the other end of the connecting post is an exposed portion with a rotating hole. The rotating sleeve includes a rotating arm, a sleeve, and a fixing head, wherein the rotating arm, sleeve, and fixing head are integrally formed and connected in sequence. The rotating arm has an L-shaped structure, with the corner of the rotating arm pointing away from the side of the outgoing terminal. The hinge end of the rotating arm is installed at the rotating hole of the connecting post and is rotatably connected by a rotating shaft. The sleeve is a hollow tube, wherein the flexible conductive section of the outgoing terminal passes through the sleeve and exits from the other end of the sleeve. The sleeve holds the flexible conductive section of the outgoing terminal tightly in the cavity of the rotating component to protect the outgoing terminal. The flexible conductive section of the outgoing terminal at the corresponding rotating arm is exposed outward from the sleeve. The fixing head is used to fix one end of the clamp of the outgoing terminal and to fix the limiting component and the insulating plug.

2. The fully sealed disconnect switch according to claim 1, characterized in that: It also includes a limiting component, which includes a first limiting member and a second limiting member. The first limiting member is fixed on the first insulating post, and the second limiting member is fixed on the fixing head. When the input terminal and the output terminal are electrically connected, the first limiting member and the second limiting member are engaged to prevent the input and output terminals from detaching at will.

3. The fully sealed disconnect switch according to claim 1, characterized in that: Both the first and second insulating posts are provided with alternating umbrella skirt structures of different sizes along their axial direction.

Images