Contact seat, isolating switch and switch cabinet

Abstract

The invention belongs to the field of switch cabinets, and particularly relates to a contact seat, an isolating switch and a switch cabinet. The contact seat comprises a conductive seat, the conductive seat is provided with a jack, a reset elastic piece and a conductive plate capable of moving axially are installed in the jack, and the conductive seat is fixedly connected with a blocking edge. The periphery of the conductive plate is provided with a conductive connecting part which is used for being attached to the inner circumferential surface of the blocking edge, and a blocking structure which protrudes out of the conductive connecting part in the radial direction and is used for being matched with the inner end face of the blocking edge in a blocking mode. The distance between the stop structure and one end, deviating from the reset elastic piece, of the conductive plate is equal to the thickness of the stop edge, so that the outer contour of the contact seat is a complete closed curved surface without a sharp corner, and the appearance structure of the contact seat is continuous. Electric field concentration near the orifice is avoided, and the insulation performance of the isolation switch is improved. The isolating switch and the switch cabinet both comprise the contact seat.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of switch cabinets, in particular to a contact seat, an isolating switch and a switch cabinet. BACKGROUND

[0002] The direct-acting isolating switch includes a high-voltage contact seat, a moving contact and a moving contact support seat on the same axis, the high-voltage contact seat is provided with a socket to meet the plugging of the moving contact, the moving contact is provided with multiple elastic contact fingers for contact and conduction with the inner wall of the socket, and the on-off state is switched by controlling the movement of the moving contact along the axis. Due to strong current-carrying capacity, the direct-acting isolating switch is widely used in gas-insulated switch cabinets with large current to meet the current-carrying demand.

[0003] When the current level of the switch cabinet is high, in order to improve the current-carrying capacity, the diameters of the moving contact and the socket of the high-voltage contact seat also need to be increased adaptively, which is easy to cause sharp corners at the ends of the high-voltage contact seat and the moving contact support seat of the direct-acting isolating switch, and the sharp corners are easy to cause electric field concentration, which affects the reliable operation of the switch cabinet with large current. The applicant's Chinese patent application for invention with application publication number CN117672757A discloses a voltage equalizing structure for a contact seat, which includes a second tubular structure sleeved on the end of the contact seat, one end of the second tubular structure is provided with an inner turning edge, and the profile line between the outer surface of the inner turning edge and the end of the second tubular structure away from the inner turning edge includes several smoothly transitioned arc segments. By forming a smooth arc surface without sharp end protrusions at the end of the contact seat, the electric field concentration at the ends of the moving contact support seat and the high-voltage contact seat is avoided, and the electric field distribution characteristics and insulation performance of the ends of the moving contact support seat and the high-voltage contact seat are improved.

[0004] When the moving contact support seat and the high-voltage contact seat are in conduction, the above-mentioned voltage equalizing structure can improve the electric field distribution of the ends of the moving contact support seat and the high-voltage contact seat through several smoothly transitioned arc segments. However, when the moving contact and the high-voltage contact are in the off state, the socket of the high-voltage contact seat is exposed to a high-voltage environment, and the electric field lines are concentrated at the hole position of the socket. Moreover, the socket structure of the high-voltage contact seat makes the shape of the high-voltage contact seat discontinuous, which causes uneven electric field distribution at the hole position of the socket, and the maximum field strength near the hole of the socket is higher, and the higher field strength increases the possibility of insulation breakdown at the isolation break between the moving contact and the high-voltage contact.

[0005] On this basis, in order to improve the insulation performance between the moving contact and the high-voltage contact, the isolation break (distance) between the moving contact and the high-voltage contact can only be increased in the prior art, which will lead to the increase of the size of the switch cabinet, the increase of the required insulation gas and sheet metal material of the switch cabinet, the increase of the occupied area during use, and finally the increase of the production cost and the use cost. SUMMARY

[0006] The purpose of this invention is to provide a contact holder that solves the technical problem of electric field concentration near the orifice of the socket in the open state, which exists in the high-voltage contact holders of existing direct-acting disconnecting switches. Another purpose of this invention is to provide a disconnecting switch and a switch cabinet to solve the same technical problem.

[0007] To achieve the above objectives, the technical solution for the contact base provided by this invention is as follows: The contact base includes a conductive base with an insertion hole. A reset elastic element and an axially movable conductive plate are installed in the insertion hole. A stop element is fixedly connected to the conductive base. The stop element has a stop edge located at the opening of the insertion hole. The outer periphery of the conductive plate has a conductive connection portion for engaging with the inner circumferential surface of the stop edge, and a stop structure that protrudes radially from the conductive connection portion for engaging with the inner end face of the stop edge. The reset elastic element is used to press the conductive plate outward when the moving contact is not inserted into the insertion hole, so that the conductive plate is held in the position where the stop structure and the stop edge engage. The distance between the stop structure and the end of the conductive plate away from the reset elastic element is equal to the thickness of the stop edge, so that the contact base forms a continuous and smooth outer contour.

[0008] This invention is an improved invention, and its beneficial effects are as follows: By elastically connecting an axially movable conductive plate between the bottom and opening of the socket, and setting a retaining edge matching the conductive plate at the end of the socket opening on the conductive base, when the moving contact is disconnected from the contact base, the conductive plate, under the action of the reset elastic element, cooperates with the retaining edge to make the end face of the conductive base smoothly transition, thereby making the outer contour of the contact base present a complete and cornerless closed curved surface, making the outer structure of the contact base continuous, avoiding electric field concentration near the opening, making the electric field near the opening uniformly distributed, achieving the purpose of reducing the maximum field strength near the high voltage contact base and improving the insulation performance between the moving contact and the contact base.

[0009] As a further improvement, the conductive base is fitted with a voltage equalization structure, which has an inwardly turned edge that fits into the end of the socket where the orifice is located, and the retaining edge is formed by the inwardly turned edge.

[0010] As a further improvement, the stop structure includes one or more protrusions disposed on the outer periphery of the conductive plate, and the insertion hole includes a conductive hole for contacting and communicating with the moving contact and one or more guide grooves formed on the inner peripheral wall of the conductive hole and extending axially to the opening of the hole, with the guide grooves corresponding to and guiding the protrusions one by one.

[0011] As a further improvement, the blocking structure includes an annular protrusion disposed on the outer periphery of the conductive plate, the annular protrusion engaging with the socket guide.

[0012] To achieve the above objectives, the technical solution for the disconnecting switch provided by this invention is as follows: A disconnecting switch includes a contact base and a moving contact. The contact base includes a conductive seat with a socket. A reset elastic element and an axially movable conductive plate are installed in the socket. A stop element is fixedly connected to the conductive seat. The stop element has a stop edge located at the socket opening. The outer periphery of the conductive plate has a conductive connection portion for engaging with the inner circumferential surface of the stop edge, and a stop structure that protrudes radially from the conductive connection portion for engaging with the inner end face of the stop edge. The reset elastic element is used to press the conductive plate outward when the moving contact is not inserted into the socket, so that the conductive plate is held in the position where the stop structure and the stop edge engage. The distance between the stop structure and the end of the conductive plate away from the reset elastic element is equal to the thickness of the stop edge.

[0013] This invention is an improved invention, and its beneficial effects are as follows: By elastically connecting an axially movable conductive plate between the bottom and opening of the socket, and setting a retaining edge matching the conductive plate at the end of the socket opening on the conductive base, when the moving contact is disconnected from the contact base, the conductive plate, under the action of the reset elastic element, cooperates with the retaining edge to make the end face of the conductive base smoothly transition, thereby making the outer contour of the contact base present a complete and cornerless closed curved surface, making the outer structure of the contact base continuous, avoiding electric field concentration near the opening, making the electric field near the opening uniformly distributed, achieving the purpose of reducing the maximum field strength near the high voltage contact base and improving the insulation performance between the moving contact and the contact base.

[0014] As a further improvement, the conductive base is fitted with a base end equalizing structure, which has an inwardly turned edge that fits into the end of the socket where the hole is located, and the retaining edge is formed by the inwardly turned edge.

[0015] As a further improvement, the stop structure includes one or more protrusions disposed on the outer periphery of the conductive plate, and the insertion hole includes a conductive hole for contacting and communicating with the moving contact and one or more guide grooves formed on the inner peripheral wall of the conductive hole and extending axially to the opening of the hole, with the guide grooves corresponding to and guiding the protrusions one by one.

[0016] As a further improvement, the blocking structure includes an annular protrusion disposed on the outer periphery of the conductive plate, the annular protrusion engaging with the socket guide.

[0017] As a further improvement, the moving contact is equipped with a support base, and the two ends of the support base are respectively connected to a head end equalizing structure. The head end equalizing structure has an inward flange that fits against the end of the support base, and the diameter of the moving contact is equal to the diameter of the inner circumferential surface of the inward flange, and the length of the moving contact is equal to the distance between the outer end faces of the two inward flanges.

[0018] To achieve the above objectives, the technical solution for the switchgear provided by this invention is as follows: A switch cabinet includes a cabinet and a disconnecting switch connected to the cabinet. The disconnecting switch includes a contact base and a moving contact. The contact base includes a conductive base with a socket. A reset elastic element and an axially movable conductive plate are installed in the socket. A stop element is fixed to the conductive base. The stop element has a stop edge located at the socket opening. The outer periphery of the conductive plate has a conductive connection part for engaging with the inner circumferential surface of the stop edge and a stop structure that protrudes radially from the conductive connection part for engaging with the inner end face of the stop edge. The reset elastic element is used to press the conductive plate outward when the moving contact is not inserted into the socket, so that the conductive plate is held in the position where the stop structure and the stop edge engage. The distance between the stop structure and the end of the conductive plate away from the reset elastic element is equal to the thickness of the stop edge.

[0019] This invention is an improved invention, and its beneficial effects are as follows: By elastically connecting an axially movable conductive plate between the bottom and opening of the socket, and setting a retaining edge matching the conductive plate at the end of the socket opening on the conductive base, when the moving contact is disconnected from the contact base, the conductive plate, under the action of the reset elastic element, cooperates with the retaining edge to make the end face of the conductive base smoothly transition, thereby making the outer contour of the contact base present a complete and cornerless closed curved surface, making the outer structure of the contact base continuous, avoiding electric field concentration near the opening, making the electric field near the opening uniformly distributed, reducing the maximum field strength near the high-voltage contact base, and achieving the purpose of improving the insulation performance between the moving contact and the contact base, and improving the reliability of high-current switchgear operation.

[0020] As a further improvement, the conductive base is fitted with a base end equalizing structure, which has an inwardly turned edge that fits into the end of the socket where the hole is located, and the retaining edge is formed by the inwardly turned edge.

[0021] As a further improvement, the stop structure includes one or more protrusions disposed on the outer periphery of the conductive plate, and the insertion hole includes a conductive hole for contacting and communicating with the moving contact and one or more guide grooves formed on the inner peripheral wall of the conductive hole and extending axially to the opening of the hole, with the guide grooves corresponding to and guiding the protrusions one by one.

[0022] As a further improvement, the blocking structure includes an annular protrusion disposed on the outer periphery of the conductive plate, the annular protrusion engaging with the socket guide.

[0023] As a further improvement, the moving contact is equipped with a support base, and the two ends of the support base are respectively connected to a head end equalizing structure. The head end equalizing structure has an inward flange that fits against the end of the support base, and the diameter of the moving contact is equal to the diameter of the inner circumferential surface of the inward flange, and the length of the moving contact is equal to the distance between the outer end faces of the two inward flanges. Attached Figure Description

[0024] Figure 1 This is a cross-sectional view of an embodiment of the contact seat of the present invention; Figure 2 forFigure 1 A magnified view of a portion of region A in the middle; Figure 3 This is a schematic diagram of an embodiment of the conductive plate of the contact seat of the present invention; Figure 4 This is a cross-sectional view of an embodiment of the present invention with the contact seat and moving contact in the disconnected state; Figure 5 This is a cross-sectional view of an embodiment of the conductive state of the contact seat and moving contact of the present invention.

[0025] Explanation of reference numerals in the attached figures: 1. Seat end equalizing structure; 101. Inward flange; 102. Stop flange; 2. Conductive seat; 201. Conductive hole; 202. Guide groove; 203. Mounting hole; 3. Reset elastic element; 4. Conductive plate; 401. Conductive connection part; 402. Protrusion; 5. Connecting bolt; 6. Mounting bolt; 7. Support seat; 8. Moving contact; 9. Elastic contact finger; 10. Gasket; 11. Head end equalizing structure. Detailed Implementation

[0026] To address the technical problem of electric field concentration near the orifice of the socket in the open state of existing direct-acting disconnecting switches, the basic technical concept of this invention is as follows: By connecting a retaining edge and a conductive plate that can move axially along the socket to the contact base, when the moving contact is disconnected from the contact base, the retaining edge and the conductive plate cooperate to smoothly transition the position of the socket orifice, thereby making the outer contour of the contact base form a continuous closed curved surface without sharp corners, so as to reduce the maximum electric field strength near the orifice and improve the insulation performance of the contact base.

[0027] The present invention will be further described in detail below with reference to the embodiments.

[0028] Specific embodiments of the contact base for disconnecting switches provided by the present invention: like Figures 1-3 As shown, the contact base includes a conductive base 2. One end of the conductive base 2 has a conductive hole 201. The inner peripheral wall of the conductive hole 201 is connected to two guide grooves 202 extending axially to the opening. The conductive hole 201 and the two guide grooves 202 together form a socket for insertion and removal of the moving contact. A reset elastic member 3 and a conductive plate 4 that can move axially are installed in the socket. The outer edge of the conductive plate 4 near the reset elastic member 3 has two protrusions 402 that serve as a stop structure. The protrusions 402 guide and cooperate with the guide grooves 202. The end of the conductive plate 4 away from the reset elastic member 3 has a conductive connection part 401.

[0029] In addition, the conductive base 2 is fitted with a base end equalizing structure 1. The base end equalizing structure 1 has an inwardly turned edge 101 that fits against the end of the conductive base 2, and the base end equalizing structure 1 is fixed to the outer peripheral surface of the conductive base 2 by connecting bolts 5. Specifically, the base end equalizing structure 1 and the connection method between the base end equalizing structure 1 and the contact base can be the same as the equalizing structure for the contact base and the connection method between the equalizing structure and the contact base disclosed in Chinese invention patent application CN117672757A introduced in the background art. Unlike the prior art, the portion of the inwardly turned edge 101 that covers the guide groove 202 constitutes a retaining edge 102 that stops and cooperates with the protrusion 402 of the conductive plate 4, and the distance from the protrusion 402 to the end face of the conductive plate 4 away from the reset elastic member 3 is equal to the thickness of the retaining edge 102. The diameter of the conductive connection part 401, the diameter of the conductive hole 201, the diameter of the inner peripheral surface of the retaining edge 102, and the diameter of the moving contact are all equal.

[0030] In this embodiment, the conductive connection portion 401 of the conductive plate 4 and the inner peripheral wall of the conductive hole 201 are guided and engaged. Two spaced protrusions 402 on the conductive plate 4 are respectively guided and engaged with two spaced guide grooves 202 on the inner peripheral wall of the conductive hole 201. The protrusions 402 and the guide grooves 202 also have an anti-rotation function, which can prevent the conductive plate 4 from rotating during axial movement, making the axial movement of the conductive plate 4 smoother, preventing the conductive plate 4 from getting stuck in the socket, and ensuring that the contact seat can normally conduct and disconnect with the moving contact. In other embodiments, the diameter of the conductive connection portion 401, the diameter of the inner peripheral surface of the retaining edge 102, and the diameter of the moving contact can be slightly smaller than the diameter of the conductive hole 201. In this case, the moving contact can conduct through the contact between the inner peripheral wall of the conductive hole 201 by the elastic contact finger, and the conductive plate 4 can only be guided and engaged by the protrusions 402 and the guide grooves 202, which helps to reduce the frictional resistance between the conductive plate 4 and the conductive seat 2. Of course, in other embodiments, the blocking structure may also be one or more protrusions provided on the outer edge of the conductive plate near the end of the reset elastic member for blocking and engaging with the inner end face of the blocking edge.

[0031] When the moving contact is disconnected from the contact seat, the conductive plate 4 abuts against the inner end face of the retaining flange 102 under the elastic support of the reset elastic member 3. Specifically, the end face of the protrusion 402 facing the inward flange 101 is engaged with the inner surface of the retaining flange 102, the outer peripheral surface of the conductive connection part 401 is in contact with the inner peripheral surface of the retaining flange 102, and the outer end face of the conductive plate 4 is flush with the outer end face of the retaining flange 102. When the disconnecting switch needs to be turned on, the moving contact can push the conductive plate 4 into the socket by compressing the reset elastic member 3, so that the moving contact is inserted into the socket of the conductive seat 2, and the moving contact is made in contact with the inner peripheral wall of the conductive hole 201.

[0032] By elastically connecting an axially movable conductive plate 4 between the bottom and opening of the insertion hole, and setting a retaining edge 102 matching the conductive plate 4 at the end of the insertion hole on the conductive base 2, when the moving contact is disconnected from the contact base, the conductive plate 4, under the action of the reset elastic element 3, cooperates with the retaining edge 102 to make the end face of the conductive base 2 smoothly transition, thereby making the outer contour of the contact base present a complete and cornerless closed curved surface, making the outer shape structure of the contact base continuous, thereby avoiding the concentration of electric field near the opening, making the electric field near the opening uniformly distributed, achieving the purpose of reducing the maximum field strength near the high voltage contact base and improving the insulation performance between the moving contact and the contact base.

[0033] like Figure 1 and Figure 2 As shown, the inner surface of the seat end equalizing structure 1 is in contact with the outer peripheral surface of the conductive seat 2 and the end face where the hole of the insertion hole is located. The outer peripheral surface of the seat end equalizing structure 1 is an arc-shaped curved surface, and the end face is a plane. The outer peripheral surface and the end face of the seat end equalizing structure 1 are connected by several arc-shaped smooth transitions, so that a complete and smooth outer contour without sharp corners is formed on the outer surface of the conductive seat 2, so as to further improve the electric field distribution characteristics at the end of the contact seat, thereby improving the insulation performance of the insulation break between the end of the contact seat and the moving contact.

[0034] like Figure 1 As shown, the other end of the conductive base 2 has a mounting hole 203. The mounting bolt 6 passes through the washer 10 and the mounting hole 203 in sequence to connect to the conductive copper busbar. The bolt head of the mounting bolt 6 connected to the mounting hole 203 forms a guide post supporting the reset elastic element 3. The bolt head extends axially along the insertion hole and is inserted into the interior of the reset elastic element 3, guiding the axial expansion and contraction of the reset elastic element 3, and thus limiting the axial movement of the conductive plate 4. This helps to prevent the conductive plate 4 from getting stuck in the insertion hole and ensures that the contact base can normally conduct and disconnect with the moving contact.

[0035] Preferably, the reset elastic element 3 is a compression spring. The compression spring can be directly inserted into the insertion hole, or its two ends can be connected to the bottom of the insertion hole of the conductive base 2 and the conductive plate 4, respectively. When the two ends of the compression spring are connected to the bottom of the insertion hole of the conductive base 2 and the conductive plate 4, the compression spring not only supports the axial outward movement of the conductive plate 4, but also prevents the conductive plate 4 from rotating during axial movement. In other embodiments, the reset elastic element 3 can also be a plurality of highly resilient rubber parts arranged along the inner peripheral wall of the conductive hole 201.

[0036] In other embodiments, since the conductive plate 4 can compensate for the gap at the socket, the retaining edge 102 is not necessarily formed by the inner edge of the seat end equalizing structure 1. In fact, other embodiments do not exclude the absence of the seat end equalizing structure 1. For example, a retaining ring can be installed at the end of the conductive seat 2. The shape of the retaining ring should match the shape of the end of the conductive seat 2. In this case, the inner edge of the retaining ring constitutes the retaining edge.

[0037] In other embodiments, the stop structure can also be an annular protrusion on the outer periphery of the conductive plate, and correspondingly, an annular guide groove is provided on the inner peripheral wall of the socket to guide and cooperate with the annular protrusion. In this case, an axial extension portion smaller than the socket is provided at the end of the conductive plate away from the reset elastic element. The diameter of the inner peripheral surface of the stop, the diameter of the axial extension portion, and the diameter of the moving contact are equal and all smaller than the diameter of the socket. The portion of the conductive plate where the annular protrusion is located constitutes the large-diameter section, and the portion of the conductive plate where the axial extension portion is located constitutes the small-diameter section. The large-diameter section and the small-diameter section constitute a stepped structure. When the moving contact is in the disconnected state from the contact seat, the stepped vertical surface of the stepped structure is in a stop-fitting cooperation with the inner end face of the stop, the outer peripheral surface of the small-diameter section is in contact with the inner peripheral wall of the stop, and the outer end face of the conductive plate is flush with the outer end face of the stop. In this case, a flexible contact finger should be provided on the moving contact. When the moving contact is inserted into the socket, the flexible contact finger is squeezed radially inward by the retaining edge and enters the socket. After entering the conductive hole, it expands radially outward to contact the inner peripheral wall of the socket and conduct electricity.

[0038] In other embodiments, the mounting bolt 6 can also pass sequentially through the conductive copper busbar and the conductive base 2. In this case, the threaded portion of the mounting bolt 6 that penetrates into the conductive base 2 constitutes a guide post supporting the reset elastic element 3; when the mounting bolt 6 is replaced with a stud, the guide post can also be the stud portion that penetrates into the conductive base 2; or, the guide post can also be an annular protrusion 402 provided on the bottom of the insertion hole. In short, anything that can provide support and guidance for the reset elastic element 3 is acceptable.

[0039] Specific embodiments of the disconnecting switch provided by the present invention: like Figure 4 As shown, the disconnecting switch includes a contact base, a moving contact 8, and a support base 7 for supporting the moving contact 8. The contact base and the support base 7 are located on the same axis and spaced apart. When the disconnecting switch is in the open state, the moving contact 8 is mounted on the support base 7 and is located on the same axis as the socket of the contact base. The distance between the moving contact 8 and the contact base forms an insulation break. The moving contact 8 can move axially along the support base 7. Both ends of the support base 7 are respectively connected to a head-end equalizing structure 11. Preferably, the head-end equalizing structure 11 is the same as the seat-end equalizing structure 1 connected to the contact base. The head-end equalizing structures 11 are all connected to the outer peripheral surface of the support base 7 by connecting bolts 5. Furthermore, the diameter of the moving contact 8 is equal to the diameter of the inner peripheral surface of the upper flange of the head-end equalizing structure 11, and the length of the moving contact 8 is equal to the distance between the outer end faces of the two inward flanges on the two head-end equalizing structures 11. When the moving contact 8 is disconnected from the contact seat, the moving contact 8 is fully inserted into the support seat 7 and forms a continuous and closed outer contour without sharp corners with the support seat 7. This avoids the formation of electric field concentration at the opposite end of the moving contact 8 and the contact seat, so that the electric field is evenly distributed on the outer surface of the moving contact 8 and the support seat 7, improving the insulation performance of the isolation break between the moving contact 8 and the contact seat, and preventing the occurrence of partial discharge.

[0040] In other embodiments, the head-end equalizing structure may be different from the seat-end equalizing structure, and the connection method between the head-end equalizing structure and the support base may also be different from the connection method between the seat-end equalizing structure and the contact base, as long as the head-end equalizing structure can provide a uniform electric field to the end of the moving contact.

[0041] like Figure 5 As shown, when the moving contact 8 is in contact with the contact base, the moving contact 8 extends from the support base 7 and inserts into the conductive hole 201 of the contact base. Specifically, a resilient contact finger 9 is connected to the moving contact 8. One end of the moving contact 8 is inserted into the conductive hole 201 and contacts the inner peripheral wall of the conductive hole 201 through the resilient contact finger 9, while the other end of the moving contact 8 is supported in the central hole of the support base 7. In practice, the resilient contact finger 9 is mainly used to strengthen the connection between the moving contact 8 and the conductive base 2. In other embodiments, the resilient contact finger 9 may not be provided on the moving contact 8, and the moving contact 8 directly contacts the inner peripheral wall of the conductive hole 201 through its outer peripheral surface.

[0042] It should be noted that the implementation of the contact seat is the same as that described in any of the above-described implementations, and will not be repeated here. Furthermore, the method of driving the moving contact to move when the disconnecting switch is open or closed is a conventional technique used by those skilled in the art. For example, the moving contact is threaded onto a screw, and the screw is driven to rotate in both directions by a motor to drive the axial reciprocating movement of the moving shaft head; this will not be specifically described here.

[0043] Specific embodiments of the switchgear provided by the present invention: Specifically, the switch cabinet includes a cabinet body and a disconnecting switch connected to the cabinet body. The implementation of the disconnecting switch is the same as that described in any of the above-mentioned implementations, and will not be further specified here.

[0044] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A contact base, including a conductive base, wherein the conductive base has a socket, characterized in that, A reset elastic element and an axially movable conductive plate are installed inside the socket. A stop element is fixedly connected to the conductive base. The stop element has a stop edge located at the socket opening. The outer periphery of the conductive plate is provided with a conductive connection part for fitting with the inner circumferential surface of the stop edge, and a stop structure that protrudes radially from the conductive connection part for stopping and engaging with the inner end face of the stop edge. The reset elastic element is used to press the conductive plate outward when the moving contact is not inserted into the socket so that the conductive plate is held in the position where the stop structure and the stop edge are engaged. The distance between the stop structure and the end of the conductive plate away from the reset elastic element is equal to the thickness of the stop edge, so that the contact base forms a continuous and smooth outer contour.

2. The contact seat according to claim 1, characterized in that, The conductive base is fitted with a voltage equalization structure, which has an inwardly turned edge that fits into the end of the socket where the hole is located, and the retaining edge is formed by the inwardly turned edge.

3. The contact seat according to claim 1 or 2, characterized in that, The blocking structure includes one or more protrusions on the outer periphery of the conductive plate, and the insertion hole includes a conductive hole for contacting and communicating with the moving contact and one or more guide grooves opened on the inner peripheral wall of the conductive hole and extending axially to the opening of the hole. The guide grooves correspond one-to-one with the protrusions for guiding and cooperating.

4. The contact seat according to claim 1 or 2, characterized in that, The blocking structure includes an annular protrusion disposed on the outer periphery of the conductive plate, which engages with the guide hole.

5. A disconnecting switch, comprising a contact base and a moving contact, wherein the contact base includes a conductive base with a socket, characterized in that, A reset elastic element and an axially movable conductive plate are installed inside the socket. A stop element is fixedly connected to the conductive base. The stop element has a stop edge located at the socket opening. The outer periphery of the conductive plate is provided with a conductive connection part for fitting with the inner circumferential surface of the stop edge, and a stop structure that protrudes radially from the conductive connection part for stopping and engaging with the inner end face of the stop edge. The reset elastic element is used to press the conductive plate outward when the moving contact is not inserted into the socket so that the conductive plate is held in the position where the stop structure and the stop edge are engaged. The distance between the stop structure and the end of the conductive plate away from the reset elastic element is equal to the thickness of the stop edge.

6. The disconnecting switch according to claim 5, characterized in that, The conductive base is fitted with a base end equalizing structure, which has an inwardly turned edge that fits into the end of the socket where the hole is located, and the retaining edge is formed by the inwardly turned edge.

7. The disconnecting switch according to claim 5, characterized in that, The blocking structure includes one or more protrusions on the outer periphery of the conductive plate, and the insertion hole includes a conductive hole for contacting and communicating with the moving contact and one or more guide grooves opened on the inner peripheral wall of the conductive hole and extending axially to the opening of the hole. The guide grooves correspond one-to-one with the protrusions for guiding and cooperating.

8. The disconnecting switch according to claim 5, characterized in that, The blocking structure includes an annular protrusion disposed on the outer periphery of the conductive plate, which engages with the guide hole.

9. The disconnecting switch according to any one of claims 6-8, characterized in that, The moving contact is equipped with a support base, and the two ends of the support base are respectively connected to the head end equalizing structure. The head end equalizing structure has an inward flange that fits with the end of the support base, and the diameter of the moving contact is equal to the diameter of the inner circumferential surface of the inward flange, and the length of the moving contact is equal to the distance between the outer end faces of the two inward flanges.

10. A switch cabinet, comprising a cabinet body and a disconnecting switch connected to the cabinet body, characterized in that, The disconnecting switch is the disconnecting switch as described in any one of claims 5-9.

Images