Solid-sealed polar pole outgoing line assembly, solid-sealed polar pole and vacuum circuit breaker

Abstract

The invention provides a solid-sealed polar pole outgoing line assembly, a solid-sealed polar pole and a vacuum circuit breaker, and belongs to the technical field of switch equipment. The solid-sealed polar pole outgoing line assembly comprises a conductive seat which is used for being fixed with a sleeve of a solid-sealed polar pole, a conductive block which is located in an inner hole of the conductive seat and is used for being fixedly conducted with a movable end of a vacuum arc-extinguishing chamber of the solid-sealed polar pole, and a flexible connector of which two ends are fixedly conducted with the conductive seat and the conductive block through screws respectively, the flexible connector comprises fixing sections which are fixed between the conductive seat and the conductive block and the corresponding screws respectively, and the end faces of the fixing sections at the two ends of the flexible connector face the axis of the inner hole of the conductive seat. The flexible connection further comprises bending sections connected with the ends, opposite to the end faces of the fixing sections at the two ends, of the fixing sections. The size of the conductive seat in the direction perpendicular to the opening and closing direction can be reduced, so that the size of the solid-sealed polar pole is reduced, and the miniaturization design of a product is facilitated.

Description

Technical Field

[0001] The present invention relates to an outgoing line assembly of a solid-sealed pole column, a solid-sealed pole column and a vacuum circuit breaker, belonging to the technical field of switching equipment. Background Art

[0002] As the main switch of the traction power supply system of an electric locomotive, the vacuum circuit breaker not only has the basic function of switching the main circuit of the electric locomotive on and off, but also can quickly cut off the fault current under abnormal working conditions, ensuring the safety of the electric locomotive and its power supply system and the reliability of the traction power supply of the electric locomotive.

[0003] A vacuum circuit breaker generally includes a solid-sealed pole column and an operating mechanism for controlling the opening and closing of the solid-sealed pole column. For example, the vacuum circuit breaker, its solid-sealed pole column and conductive seat disclosed in the Chinese utility model patent with the authorization announcement number CN204303656U. The vacuum circuit breaker includes two solid-sealed pole columns. One of the solid-sealed pole columns includes a vacuum interrupter, a conductive seat and a sleeve cast and fixed outside the vacuum interrupter and the conductive seat. The conductive seat includes a cylindrical main body. A conductive block and a flexible connection are arranged in the inner hole of the cylindrical main body. One end of the flexible connection is welded and fixed to the conductive block for conduction, and the other end is fixed and conducted to the conductive seat through a screw. The solid-sealed pole column also includes an insulating pull rod. The insulating pull rod passes through the conductive block and is fixedly connected to the moving end of the vacuum interrupter to realize the fixed conduction between the conductive block and the moving end of the vacuum interrupter.

[0004] One end of the above flexible connection is welded to the conductive block. During use, as the insulating pull rod continuously drives the conductive block and the flexible connection to move to realize opening and closing, it is easy to cause the welding part to crack, and the use reliability is poor. If the end of the flexible connection is also fixed to the conductive block through a screw, there are two fixing methods. One is that the axial direction of the screw is perpendicular to the direction of the opening and closing movement of the conductive block, that is, perpendicular to the axis direction of the inner hole of the conductive seat. In this case, the end of the flexible connection is still fixed on the side of the conductive block, and the head of the screw is exposed in the inner hole of the conductive seat. In order to avoid interference with the inner hole of the conductive seat during the opening and closing movement, the inner hole size of the conductive seat needs to be set large enough, and correspondingly, the size of the conductive seat in the direction perpendicular to the opening and closing direction will be increased, resulting in a larger size of the solid-sealed pole column.

[0005] The other is that the axial direction of the screw is the same as the axis direction of the inner hole of the conductive seat. In this case, the end of the flexible connection is fixed on the end face of the conductive block. Considering that the screws at both ends of the flexible connection cannot interfere with each other and the flexible connection can be bent, it is required that there is also enough spacing between the screws at both ends of the flexible connection. Therefore, the spacing between the conductive seat and the conductive block needs to be increased, which results in a larger size of the conductive seat in the direction perpendicular to the opening and closing direction, and also results in a larger size of the solid-sealed pole column, which is not conducive to the miniaturization design of the product. Summary of the Invention

[0006] The object of the present invention is to provide a sealed pole column lead-out assembly, so as to solve the problem that when the two ends of a flexible connection are respectively fixed to a conductive base and a conductive block by screws in the prior art, the size of the sealed pole column is large, which is not conducive to the miniaturized design of the product; the object of the present invention is also to provide a sealed pole column and a vacuum circuit breaker to solve the above problems.

[0007] To achieve the above object, the following technical solutions are adopted for the sealed pole column lead-out assembly in the present invention: A sealed pole column lead-out assembly includes a conductive base for fixing to the bushing of the sealed pole column, a conductive block located in the inner hole of the conductive base and for fixedly conducting with the moving end of the vacuum interrupter of the sealed pole column, and a flexible connection whose two ends are respectively fixed and conducted with the conductive base and the conductive block by screws. The axes of the screws at both ends of the flexible connection are parallel and the axis directions are the same as the axis direction of the inner hole of the conductive base. The flexible connection includes fixed segments respectively fixed between the conductive base and the conductive block and the corresponding screws. The end faces of the fixed segments at both ends of the flexible connection are arranged facing the axis of the inner hole of the conductive base. The flexible connection further includes a bent segment connected to one end of the two fixed segments facing away from their respective end faces.

[0008] The beneficial effect of the above technical solution is that: the present invention belongs to an invention and creation with a changed element relationship, changing the shape of the flexible connection and the relative position of the end faces of the fixed segments at both ends of the flexible connection to the axis of the inner hole of the conductive base. The end faces of the fixed segments at both ends of the flexible connection are arranged facing the axis of the inner hole of the conductive base, while in the prior art, one of the end faces of the fixed segments at both ends of the flexible connection faces inward and the other end face faces outward, and in the present invention, both face inward, so that the bent segment of the flexible connection can envelope the screw connected to the conductive base, and the bent part of the flexible connection is located outside the screw instead of inside, which is more conducive to the bending of the flexible connection and does not require a large distance to be maintained between the conductive base and the conductive block. Therefore, the size of the conductive base in the direction perpendicular to the opening and closing direction can be reduced, and further the size of the sealed pole column can be reduced, which is conducive to the miniaturized design of the product.

[0009] Further, the fixed segment fixed to the conductive block is defined as the first fixed segment, the screw connected to the first fixed segment is defined as the first screw, the fixed segment fixed to the conductive base is defined as the second fixed segment, and the screw connected to the second fixed segment is defined as the second screw. The first fixed segment is fixed on the end face of the conductive block on the side facing away from the vacuum interrupter, and during the opening and closing process, the head of the first screw is always located on the side away from the vacuum interrupter of the head of the second screw.

[0010] Further, when the conductive block is in the closing position, there is an overlapping part with the second screw in the direction perpendicular to the opening and closing direction.

[0011] Further, the conductive base includes a cylindrical main body and an annular end plate connected to one end of the cylindrical main body and extending inward. The second screw is fixed on the annular end plate, and the inner hole diameter of the annular end plate is smaller than the outer diameter of the conductive block.

[0012] Further, the conductive base includes a cylindrical main body and at least two circumferentially evenly distributed connecting plates connected to the outer circumferential surface of the cylindrical main body. Each connecting plate has a joint surface for combining and fixing with the sleeve, and each connecting plate is provided with a connecting hole for connecting with the outgoing conductor.

[0013] Further, the outer circumferential surface of the cylindrical main body constitutes an outer fixing surface for combining and fixing with the sleeve.

[0014] Further, the conductive base further includes an annular end plate connected to the cylindrical main body and extending inwardly towards one end of the vacuum interrupter. The outer end face of the annular end plate constitutes an end fixing surface for combining and fixing with the sleeve or the outer rubber coating of the vacuum interrupter.

[0015] Further, the bent section includes a first extension section connected to the first fixed section and extending along the axis direction of the inner hole of the conductive base, a second extension section connected to the second fixed section and extending along the axis direction of the inner hole of the conductive base, and a connecting section connected between the first extension section and the second extension section. The extension length of the second extension section is greater than that of the first extension section.

[0016] To achieve the above object, the following technical solution is adopted for the solid-sealed pole column in the present invention: A solid-sealed pole column includes a vacuum interrupter, an outgoing line assembly, and a sleeve fixed outside the vacuum interrupter and the outgoing line assembly. The outgoing line assembly includes a conductive base for fixing with the sleeve of the solid-sealed pole column, a conductive block located in the inner hole of the conductive base and for fixedly conducting with the moving end of the vacuum interrupter of the solid-sealed pole column, and a flexible connection whose two ends are respectively fixed and conducted with the conductive base and the conductive block by screws. The axes of the screws at both ends of the flexible connection are parallel and the axis directions are the same as the axis direction of the inner hole of the conductive base. The flexible connection includes fixed sections respectively fixed between the conductive base and the conductive block and the corresponding screws. The end faces of the fixed sections at both ends of the flexible connection are both arranged towards the axis of the inner hole of the conductive base. The flexible connection further includes a bent section connected to one end of the two fixed sections facing away from their respective end faces.

[0017] The beneficial effects of the above technical solution are as follows: The present invention belongs to an improved invention. The structure of the outgoing line assembly is further defined. The end faces of the fixed sections at both ends of the flexible connection in the outgoing line assembly are both arranged towards the axis of the inner hole of the conductive base. In the prior art, one of the end faces of the fixed sections at both ends of the flexible connection faces inwards and the other faces outwards, while in the present invention, both face inwards, so that the bent section of the flexible connection can envelope the screw connected to the conductive base. The bent part of the flexible connection is located outside the screw instead of inside, which is more conducive to the bending of the flexible connection. There is no need to keep a large distance between the conductive base and the conductive block. Therefore, the size of the conductive base in the direction perpendicular to the opening and closing direction can be reduced, and further the size of the solid-sealed pole column can be reduced, which is beneficial to the miniaturized design of the product.

[0018] Further, the fixed section fixed to the conductive block is defined as the first fixed section, the screw connected to the first fixed section is the first screw, the fixed section fixed to the conductive base is the second fixed section, and the screw connected to the second fixed section is the second screw. The first fixed section is fixed on the end face of the conductive block on the side facing away from the vacuum interrupter. During the opening and closing process, the head of the first screw is always located on the side away from the vacuum interrupter of the head of the second screw.

[0019] Further, when the conductive block is in the closing position, it overlaps with the second screw in the direction perpendicular to the opening and closing direction.

[0020] Further, the conductive base includes a cylindrical main body and an annular end plate connected to one end of the cylindrical main body and extending inward. The second screw is fixed on the annular end plate, and the inner hole diameter of the annular end plate is smaller than the outer diameter of the conductive block.

[0021] Further, the conductive base includes a cylindrical main body and at least two circumferentially evenly distributed connecting plates connected to the outer peripheral surface of the cylindrical main body. Each connecting plate has a joint surface for combining and fixing with the bushing, and each connecting plate is provided with a connecting hole for connecting with the outgoing conductor.

[0022] Further, the outer peripheral surface of the cylindrical main body constitutes an outer fixing surface for combining and fixing with the bushing.

[0023] Further, the conductive base further includes an annular end plate connected to the end of the cylindrical main body facing the vacuum interrupter and extending inward. The outer end face of the annular end plate constitutes an end fixing surface for combining and fixing with the bushing or the outer rubber coating of the vacuum interrupter.

[0024] Further, the bent section includes a first extension section connected to the first fixed section and extending along the axis of the inner hole of the conductive base, a second extension section connected to the second fixed section and extending along the axis of the inner hole of the conductive base, and a connecting section connecting the first extension section and the second extension section. The extension length of the second extension section is greater than that of the first extension section.

[0025] To achieve the above object, the vacuum circuit breaker in the present invention adopts the following technical solutions: A vacuum circuit breaker includes a solid-sealed pole column and an operating mechanism for controlling the opening and closing of the solid-sealed pole column. The solid-sealed pole column includes a vacuum interrupter, an outgoing line assembly, and a bushing fixed outside the vacuum interrupter and the outgoing line assembly. The outgoing line assembly includes a conductive base for fixing to the bushing of the solid-sealed pole column, a conductive block located in the inner hole of the conductive base and for fixing and conducting with the moving end of the vacuum interrupter of the solid-sealed pole column, and a flexible connection whose two ends are respectively fixed and conducted with the conductive base and the conductive block through screws. The axes of the screws at both ends of the flexible connection are parallel and the axis directions are the same as the axis direction of the inner hole of the conductive base. The flexible connection includes fixed sections respectively fixed between the conductive base and the conductive block and the corresponding screws. The end faces of the fixed sections at both ends of the flexible connection are arranged towards the axis of the inner hole of the conductive base. The flexible connection further includes a bent section connected to one end of the two fixed sections facing away from their respective end faces.

[0026] The beneficial effects of the above technical solution are as follows: The present invention belongs to an improved invention. The structure of the outgoing line assembly is further defined. The end faces of the fixed sections at both ends of the flexible connection in the outgoing line assembly are arranged towards the axis of the inner hole of the conductive base. In the prior art, one of the end faces of the fixed sections at both ends of the flexible connection faces inwards and the other faces outwards, while in the present invention, they all face inwards, so that the bent section of the flexible connection can envelope the screw connected to the conductive base, and the bent part of the flexible connection is located outside the screw, rather than inside. This is more conducive to the bending of the flexible connection, and it is not necessary to keep a large distance between the conductive base and the conductive block. Therefore, the size of the conductive base in the direction perpendicular to the opening and closing direction can be reduced, and then the size of the solid-sealed pole column can be reduced, which is beneficial to the miniaturized design of the product.

[0027] Further, the fixed section fixed to the conductive block is defined as the first fixed section, the screw connected to the first fixed section is defined as the first screw, the fixed section fixed to the conductive base is defined as the second fixed section, and the screw connected to the second fixed section is defined as the second screw. The first fixed section is fixed on the end face of the conductive block on the side facing away from the vacuum interrupter. During the opening and closing process, the head of the first screw is always on the side away from the vacuum interrupter of the head of the second screw.

[0028] Further, when the conductive block is in the closing position, there is an overlapping part with the second screw in the direction perpendicular to the opening and closing direction.

[0029] Further, the conductive base includes a cylindrical main body and an annular end plate connected to one end of the cylindrical main body and extending inwards. The second screw is fixed on the annular end plate, and the inner hole diameter of the annular end plate is smaller than the outer diameter of the conductive block.

[0030] Further, the conductive base includes a cylindrical main body and at least two circumferentially distributed connecting plates connected to the outer peripheral surface of the cylindrical main body. Each connecting plate has a joint surface for combining and fixing with the bushing, and each connecting plate is provided with a connection hole for connecting with the outgoing line conductor.

[0031] Further, the outer peripheral surface of the cylindrical main body constitutes an outer fixing surface for being combined and fixed with the sleeve.

[0032] Further, the conductive base further includes an annular end plate connected to the cylindrical main body and extending inwardly towards one end of the vacuum interrupter. The outer end surface of the annular end plate constitutes an end fixing surface for being combined and fixed with the sleeve or the outer rubber coating of the vacuum interrupter.

[0033] Further, the bent section includes a first extension section connected to the first fixing section and extending along the axis direction of the inner hole of the conductive base, a second extension section connected to the second fixing section and extending along the axis direction of the inner hole of the conductive base, and a connecting section connecting between the first extension section and the second extension section. The extension length of the second extension section is greater than that of the first extension section. Description of the Drawings

[0034] Figure 1 It is a partial structure diagram of Embodiment 1 of the solid-sealed pole column of the present invention; Figure 2 It is a structure diagram of the lead-out component in Embodiment 1 of the solid-sealed pole column of the present invention; Figure 3 It is a front view sectional view of the conductive base of the lead-out component in Embodiment 1 of the solid-sealed pole column of the present invention; Figure 4 It is a top view of the conductive base of the lead-out component in Embodiment 1 of the solid-sealed pole column of the present invention; Figure 5 It is a front view sectional view of the conductive base of the lead-out component in Embodiment 2 of the solid-sealed pole column of the present invention; Figure 6 It is a top view of the conductive base of the lead-out component in Embodiment 2 of the solid-sealed pole column of the present invention; Figure 7 It is a structure diagram of the lead-out component in Embodiment 3 of the solid-sealed pole column of the present invention; Figure 8 It is a structure diagram of the lead-out component in Embodiment 4 of the solid-sealed pole column of the present invention; Figure 9 It is a structure diagram of the lead-out component in Embodiment 5 of the solid-sealed pole column of the present invention.

[0035] In the figure: 1, vacuum interrupter; 1-1, incoming line end; 1-2, moving end; 2, sleeve; 3, conductive base; 3-1, cylindrical main body; 3-1-1, large-diameter hole; 3-2, annular end plate; 3-2-1, small-diameter hole; 3-2-2, threaded hole; 3-3, connecting plate; 3-3-1, connecting hole; 4, conductive block; 4-1, perforation; 5, flexible connection; 5-1, first fixing section; 5-2, second fixing section; 5-3, bent section; 6, first screw; 7, second screw; 8, insulating pull rod. Detailed Embodiments

[0036] In view of the technical problems existing in the prior art, the basic concept of the present invention is to change the shape and connection mode of the flexible connection, so that the end faces of the fixed sections at both ends of the flexible connection are arranged towards the axis of the inner hole of the conductive seat, and the bent part of the flexible connection envelopes the outside of the screw connected to the conductive seat, which is beneficial to the bending of the flexible connection and reduces the distance between the conductive seat and the conductive block.

[0037] The features and performance of the present invention will be further described in detail below in conjunction with embodiments.

[0038] Embodiment 1 of the cast pole column of the present invention: As Figure 1 shown, the cast pole column includes a vacuum interrupter 1, an outgoing line assembly, and a bushing 2 cast and fixed outside the vacuum interrupter 1 and the outgoing line assembly. The vacuum interrupter 1 includes a static end and a moving end 1-2, and the static end is the incoming line end 1-1.

[0039] The outgoing line assembly includes a conductive seat 3 fixed to the bushing 2 of the cast pole column, a conductive block 4 located in the inner hole of the conductive seat 3 and fixedly conducted with the moving end 1-2 of the vacuum interrupter 1, and a flexible connection 5 fixedly conducted with the conductive seat 3 and the conductive block 4 at both ends through screws respectively. Among them, when manufacturing the cast pole column, the vacuum interrupter 1, the conductive seat 3 and the bushing 2 are integrally cast.

[0040] The cast pole column further includes an insulating pull rod 8. The insulating pull rod 8 passes through the conductive block 4 and is fixedly connected to the moving end 1-2 of the vacuum interrupter 1. Specifically, a metal insert is provided at the end of the insulating pull rod 8. The metal insert includes a stud, and the moving end 1-2 is provided with a threaded hole. The stud of the metal insert is in threaded connection with the threaded hole of the moving end 1-2, so that the conductive block 4 is clamped and fixed between the insulating pull rod 8 and the moving end 1-2. Combining Figure 2 shown, a perforation 4-1 for the metal insert of the insulating pull rod 8 to pass through is provided at the center of the conductive block 4. At the same time, a positioning groove is provided on the end face of the conductive block 4 facing the vacuum interrupter 1, and the end of the moving end 1-2 extends into the positioning groove, which facilitates the connection among the moving end 1-2, the insulating pull rod 8 and the conductive block 4.

[0041] Combining Figure 1 and Figure 2 shown, one end of the flexible connection 5 is fixedly conducted with the conductive block 4 through a first screw 6, and the other end is fixedly conducted with the conductive seat 3 through a second screw 7. The flexible connection 5 includes a first fixed section 5-1 fixed between the conductive block 4 and the first screw 6, a second fixed section 5-2 fixed between the conductive seat 3 and the second screw 7, and a bent section 5-3 connecting the first fixed section 5-1 and the second fixed section 5-2.

[0042] In this embodiment, the bent section 5-3 includes a first extension section connected to the first fixed section 5-1 and extending along the axis direction of the inner hole of the conductive base 3, a second extension section connected to the second fixed section 5-2 and extending along the axis direction of the inner hole of the conductive base 3, and a connecting section connecting the first extension section and the second extension section. The extension length of the second extension section is greater than that of the first extension section, that is, the bent section 5-3 has a U-shaped structure with one side wall long and the other side wall short. In this way, when the conductive block 4 makes opening and closing actions, it is beneficial to the deformation of the flexible connection 5.

[0043] In the present invention, the axes of the first screw 6 and the second screw 7 are parallel and the axis directions are both the same as the axis direction of the inner hole of the conductive base 3, that is, the same as the direction of the opening and closing actions of the conductive block 4. The end faces of the first fixed section 5-1 and the second fixed section 5-2 are both arranged towards the axis of the inner hole of the conductive base 3, and the bent section 5-3 is connected between one ends of the first fixed section 5-1 and the second fixed section 5-2 that are back to their respective end faces. In this way, the bent section 5-3 can envelop the second screw 7, and part of the structure of the bent section 5-3 is located on the radially outer side of the second screw 7 instead of the inner side, which is more beneficial to the bending of the flexible connection 5. There is no need to keep a large distance between the conductive base 3 and the conductive block 4, so the size of the conductive base 3 in the direction perpendicular to the opening and closing direction can be reduced, and then the size of the solid-sealed pole column can be reduced, which is beneficial to the miniaturized design of the product.

[0044] Further, the first fixed section 5-1 is fixed on the end face of the conductive block 4 on the side away from the vacuum interrupter 1. The heads of the first screw 6 and the second screw 7 face the same direction, both facing away from the vacuum interrupter 1, and during the opening and closing process, the head of the first screw 6 is always on the side away from the vacuum interrupter 1 of the head of the second screw 7. In this way, the conductive block 4 can be closer to the vacuum interrupter 1, and there is no need for the moving end 1-2 to extend out very long, which is convenient for the fixed connection between the moving end 1-2, the conductive block 4 and the insulating pull rod 8.

[0045] When the conductive block 4 is in the closing position ( Figure 2 the middle position), there is an overlapping part with the second screw 7 in the direction perpendicular to the opening and closing direction, so that the conductive block 4 is further close to the vacuum interrupter 1. And, to ensure the current-carrying capacity, multiple flexible connections 5 are usually provided and arranged circumferentially and evenly. In this embodiment, four flexible connections 5 are provided. The two ends of each flexible connection 5 are respectively fixed on the conductive block 4 and the conductive base 3 through the first screw 6 and the second screw 7. When the conductive block 4 is in the closing position, the end of the conductive block 4 is located inside the circle formed by each second screw 7.

[0046] Combined with Figure 3 and Figure 4As shown, the conductive base 3 includes a cylindrical main body 3-1 and an annular end plate 3-2 connected to one end of the cylindrical main body 3-1 and extending inward, such that the inner hole of the conductive base 3 is a stepped hole. The inner hole of the conductive base 3 includes the inner hole of the cylindrical main body 3-1 (i.e., the large-diameter hole 3-1-1) and the inner hole of the annular end plate 3-2 (i.e., the small-diameter hole 3-2-1).

[0047] In this embodiment, the annular end plate 3-2 is located at one end of the cylindrical main body 3-1 facing the vacuum interrupter 1. The second screws 7 are fixed on the annular end plate 3-2, and threaded holes 3-2-2 corresponding to the respective second screws 7 are provided on the annular end plate 3-2.

[0048] The inner hole diameter of the annular end plate 3-2 is smaller than the outer diameter of the conductive block 4. The inner hole wall of the annular end plate 3-2 is close enough to the axis of the conductive base 3, that is, the second screws 7 are close enough to the axis of the conductive base 3. Without interference between the conductive block 4 and the second screws 7, the spacing between the first screw 6 and the second screws 7 in the direction perpendicular to the opening and closing direction is small enough to ensure that the size of the conductive base 3 in the direction perpendicular to the opening and closing direction is small enough, avoiding an overly large size of the solid-sealed pole column.

[0049] The conductive base 3 further includes at least two circumferentially evenly distributed connecting plates 3-3 connected to the outer peripheral surface of the cylindrical main body 3-1. In this embodiment, four connecting plates 3-3 are provided, and the respective connecting plates 3-3 are arranged radially outside the threaded holes 3-2-2 one by one. Connecting holes 3-3-1 for connecting to the outgoing conductor are provided on each of the connecting plates 3-3. In this embodiment, the connecting holes 3-3-1 extend along the radial direction of the conductive base 3. After the conductive base 3 is cast and fixed with the bushing 2, the outer peripheral surfaces of the respective connecting plates 3-3 are combined and fixed with the bushing 2. Therefore, the outer peripheral surfaces of the respective connecting plates 3-3 constitute the joint surface combined and fixed with the bushing 2. Only the end faces of the respective connecting plates 3-3 are exposed, thereby exposing the connecting holes 3-3-1. During use, a certain connecting hole 3-3-1 can be connected to the outgoing conductor, or two oppositely arranged connecting holes 3-3-1 can be respectively connected to the outgoing conductor, which can be flexibly selected according to the specific structure of the circuit breaker, and the requirements for the posture of the fixed pole column are more flexible, as long as the positions of one or two connecting holes 3-3-1 meet the assembly requirements.

[0050] In addition, the outer peripheral surface of the cylindrical main body 3-1 constitutes the outer fixing surface combined and fixed with the bushing 2, increasing the fixed connection strength between the conductive base 3 and the bushing 2. Further, the outer end face of the annular end plate 3-2 constitutes the end fixing surface combined and fixed with the bushing 2, further strengthening the connection effect between the conductive base 3 and the bushing 2. Of course, in other embodiments, the outer end face of the annular end plate 3-2 can also be combined and fixed with the outer rubber coating of the vacuum interrupter 1, and the effect is the same.

[0051] When manufacturing the solid-sealed pole column in the present invention, the two ends of the flexible connection 5 can be fixed to the conductive block 4 and the conductive seat 3 respectively through the first screw 6 and the second screw 7 to form an outgoing line assembly. To meet the usage requirements of long mechanical life, before assembly, a glue application process needs to be added to the first screw 6 and the second screw 7. Then, the whole outgoing line assembly is fixed on the sleeve mold and integrally cast with the vacuum interrupter 1. After casting, it is necessary to measure the resistance value of the main current-carrying loop to ensure connection reliability. Of course, it is also possible to only fix the conductive seat 3 on the sleeve mold and integrally cast it with the vacuum interrupter 1, and then through the inner hole of the sleeve 2, first use the second screw 7 to fix one end of the flexible connection 5 to the conductive seat 3, and then use the first screw 6 to fix the other end of the flexible connection 5 to the conductive block 4.

[0052] The present invention can reduce the lateral dimension of the solid-sealed pole column, thereby reducing the overall dimension of the vacuum circuit breaker. At the same time, the inner hole depth of the cylindrical main body 3-1 of the conductive seat 3 is such that the conductive block 4, the flexible connection 5, and the first screw 6 are always located within the inner hole of the cylindrical main body 3-1 and will not protrude outside the cylindrical main body 3-1 during the opening and closing processes. Therefore, the conductive seat 3 forms a shielding structure, and the inner hole of the conductive seat 3 forms a shielding cavity, which can reduce the electric field strength at the connection part of the conductive seat 3, the conductive block 4, and the flexible connection 5, improve the insulation margin of the vacuum circuit breaker, and further improve the reliability of the traction power supply of the electric locomotive.

[0053] Embodiment 2 of the solid-sealed pole column in the present invention: As Figure 5 and Figure 6 shown, the difference between this embodiment and Embodiment 1 is that in this embodiment, the length of the connecting plate 3-3 is longer and can extend outside the sleeve. Therefore, the connecting hole 3-3-1 is opened perpendicular to the connecting plate 3-3, that is, the axis of the connecting hole 3-3-1 is parallel to the axis of the conductive seat.

[0054] Embodiment 3 of the solid-sealed pole column in the present invention: As Figure 7 shown, the difference between this embodiment and Embodiment 1 is that the first fixed section of the flexible connection 5 is fixed to the end face of the conductive block 4 facing the vacuum interrupter. At this time, the heads of the first screw 6 and the second screw 7 face in opposite directions. The head of the first screw 6 faces the direction of the vacuum interrupter, and the head of the second screw 7 faces away from the direction of the vacuum interrupter. When the conductive block 4 is in the closing position, there is still an overlapping part with the second screw 7 in the direction perpendicular to the opening and closing direction.

[0055] Embodiment 4 of the solid-sealed pole column in the present invention: As Figure 8As shown, the difference between this embodiment and Embodiment 1 is that the annular end plate of the conductive seat 3 is located at one end of the cylindrical main body facing away from the vacuum interrupter. At this time, the heads of the first screw 6 and the second screw 7 face in opposite directions, and the outer end face of the annular end plate is no longer fixedly combined with the sleeve or the outer rubber coating of the vacuum interrupter. Only the outer peripheral surface of the cylindrical main body constitutes the outer fixing surface fixedly combined with the sleeve, and at the same time, the outer peripheral surface of the connecting plate constitutes the combining surface fixedly combined with the sleeve.

[0056] Embodiment 5 of the solid-sealed pole column in the present invention: As Figure 9 shown, the difference between this embodiment and Embodiment 1 is that the bent section 5-3 of the flexible connection 5 is no longer a U-shaped structure with one long side wall and one short side wall, but a V-shaped structure with one long side wall and one short side wall.

[0057] In other embodiments of the solid-sealed pole column: the outer peripheral surface of the cylindrical main body of the conductive seat is no longer fixedly combined with the sleeve, and only the connecting plate is fixedly combined with the sleeve.

[0058] In other embodiments of the solid-sealed pole column: the number of connecting plates can also be two. The two connecting plates are symmetrically arranged along the radial direction. During use, both of the two connecting plates can be connected to the outgoing conductor, or only one of them can be connected to the outgoing conductor. Of course, in other embodiments, the number of connecting plates can also be only one. When there is only one connecting plate, to ensure the fixing effect between the conductive seat and the sleeve, the outer peripheral surface of the cylindrical main body of the conductive seat must be fixedly combined with the sleeve.

[0059] In other embodiments of the solid-sealed pole column: the inner hole diameter of the annular end plate can also be equal to or larger than the outer diameter of the conductive block.

[0060] In other embodiments of the solid-sealed pole column: when the conductive block is in the closing position, it can be offset from the second screw in the direction perpendicular to the opening and closing direction and does not have an overlapping part.

[0061] In other embodiments of the solid-sealed pole column: the conductive block may not be clamped and fixed between the insulating pull rod and the moving end of the interrupter. For example, the conductive block is a conductive clip. The conductive clip is sleeved outside the moving end of the interrupter and is fixed to the moving end of the interrupter by screws. At this time, the end face of the moving end of the interrupter is exposed, and the threaded hole is also exposed. Therefore, the insulating pull rod does not need to pass through the conductive block, and the metal insert of the insulating pull rod is directly fixedly connected to the threaded hole of the moving end of the interrupter.

[0062] The embodiment of the outgoing line assembly of the solid-sealed pole column in the present invention is: the specific structure of the outgoing line assembly of the solid-sealed pole column is the same as that of the outgoing line assembly in any of the above-mentioned embodiments of the solid-sealed pole column, and will not be repeated here.

[0063] An embodiment of the vacuum circuit breaker in the present invention is as follows: The vacuum circuit breaker includes a solid-sealed pole column and an operating mechanism for controlling the opening and closing of the solid-sealed pole column. The solid-sealed pole column includes a vacuum interrupter, an outgoing line assembly, and a bushing fixed outside the vacuum interrupter and the outgoing line assembly. The specific structures of the vacuum interrupter, the outgoing line assembly, and the bushing are the same as the corresponding structures in any of the above embodiments of the solid-sealed pole column, and will not be repeated here.

[0064] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. The patent protection scope of the present invention is subject to the claims. Any equivalent structural changes made by using the content of the specification and drawings of the present invention should, by the same token, be included in the protection scope of the present invention.

Claims

1. A lead-out assembly of a solid-sealed pole column, characterized in that It includes a conductive base for fixing with the bushing of the solid-sealed pole column, a conductive block located in the inner hole of the conductive base and used for fixedly conducting with the moving end of the vacuum interrupter of the solid-sealed pole column, and a flexible connection whose two ends are respectively fixedly conducted with the conductive base and the conductive block through screws. The axes of the screws at both ends of the flexible connection are parallel and the axis directions are the same as the axis direction of the inner hole of the conductive base. The flexible connection includes fixed sections respectively fixed between the conductive base and the conductive block and the corresponding screws. The end faces of the fixed sections at both ends of the flexible connection are arranged towards the axis of the inner hole of the conductive base. The flexible connection also includes a bending section connected to one end of the two fixed sections facing away from their respective end faces.

2. The lead-out component of the encapsulated pole column according to claim 1, characterized in that it is defined as The fixed section fixed to the conductive block is the first fixed section, the screw connected to the first fixed section is the first screw, the fixed section fixed to the conductive base is the second fixed section, and the screw connected to the second fixed section is the second screw. The first fixed section is fixed on the end face of the conductive block on the side facing away from the vacuum interrupter. During the opening and closing process, the head of the first screw is always on the side away from the vacuum interrupter of the head of the second screw.

3. The lead-out component of the encapsulated pole column according to claim 2, characterized in that, When the conductive block is in the closing position, there is an overlapping part with the second screw in the direction perpendicular to the opening and closing direction.

4. The lead-out component of the encapsulated pole column according to claim 2 or 3, characterized in that, The conductive base includes a cylindrical main body and an annular end plate connected to one end of the cylindrical main body and extending inward. The second screw is fixed on the annular end plate, and the inner hole diameter of the annular end plate is smaller than the outer diameter of the conductive block.

5. The lead-out component of the encapsulated pole column according to any one of claims 1 to 3, characterized in that, The conductive base includes a cylindrical main body and at least two circumferentially evenly distributed connecting plates connected to the outer peripheral surface of the cylindrical main body. Each connecting plate has a joint surface for combining and fixing with the bushing, and each connecting plate is provided with a connection hole for connecting with the outgoing conductor.

6. The lead-out assembly of the encapsulated pole column according to claim 5, characterized in that, The outer peripheral surface of the cylindrical main body constitutes an outer fixing surface for combining and fixing with the bushing.

7. The lead-out assembly of the encapsulated pole column according to claim 6, characterized in that, The conductive base also includes an annular end plate connected to the end of the cylindrical main body facing the vacuum interrupter and extending inward. The outer end face of the annular end plate constitutes an end fixing surface for combining and fixing with the bushing or the outer rubber coating of the vacuum interrupter.

8. The lead-out assembly of the encapsulated pole column according to claim 2 or 3, characterized in that, The bending section includes a first extension section connected to the first fixed section and extending along the axis direction of the inner hole of the conductive base, a second extension section connected to the second fixed section and extending along the axis direction of the inner hole of the conductive base, and a connection section connecting between the first extension section and the second extension section. The extension length of the second extension section is greater than the extension length of the first extension section.

9. A solid-sealed pole column, comprising a vacuum interrupter, an outgoing line assembly, and a bushing fixed outside the vacuum interrupter and the outgoing line assembly, characterized in that, The outgoing line assembly is the solid-sealed pole column outgoing line assembly according to any one of claims 1 to 8.

10. A vacuum circuit breaker, comprising a solid-sealed pole column and an operating mechanism for controlling the opening and closing of the solid-sealed pole column. The solid-sealed pole column includes a vacuum interrupter, an outgoing line assembly, and a bushing fixed outside the vacuum interrupter and the outgoing line assembly, characterized in that The outgoing line assembly is the solid-sealed pole column outgoing line assembly according to any one of claims 1 to 8.

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