Draw-out type solid-sealed polar pole and circuit breaker

Abstract

The utility model discloses a drawable solid-sealed polar pole which is installed on a supporting structure of a solid insulation cabinet circuit breaker. The solid-sealed polar pole comprises an isolating switch and a vacuum switch; the isolating switch comprises a grounding end; one end, far away from the grounding end, of the isolating switch extends out of a first outgoing conductor along the axial direction; one end of the vacuum switch is vertically and fixedly connected with the isolating switch to integrally form a T-shaped structure; the vacuum switch laterally extends to form a second wire outlet conductor; the second wire outlet conductor and the first wire outlet conductor face the same direction and are parallel to each other in the axial direction. When the solid-sealed polar pole is installed on the supporting structure, the grounding end of the isolating switch is vertically and fixedly connected to the vertical part of the supporting structure, and one end, far away from the isolating switch, of the vacuum switch is vertically and fixedly connected to the horizontal part of the supporting switch. The solid-sealed polar pole is connected with an adjacent electrical component in a drawable manner, and meanwhile, the solid-sealed polar pole is connected with a supporting structure in a statically determinate manner. The utility model also discloses a circuit breaker, which comprises the drawable solid-sealed polar pole.

Description

TECHNICAL FIELD

[0001] The utility model relates to high voltage electrical equipment technical field especially relates to a kind of extractable solid-encapsulated pole and circuit breaker. BACKGROUND

[0002] Solid insulation cabinet is through high voltage live part solid-encapsulated in the insulating rubber sleeve of epoxy resin etc. material, and the high voltage conducting circuit is insulated using the excellent electrical performance of insulating rubber sleeve. Compared with traditional gas insulation, the adaptability to environment of this kind of insulation mode is greatly enhanced, so solid insulation cabinet is more and more widely used in solid insulation cabinet equipment field.

[0003] As the core component of solid insulation cabinet, circuit breaker is mainly composed of solid-encapsulated pole, operating plate and support seat etc. components. The existing solid insulation cabinet, especially the solid insulation cabinet using three-position isolation circuit breaker, mostly adopts integral structure, and circuit breaker is fixedly connected with bus sleeve, cable sleeve and other circuit components, and cannot be detached for separate maintenance.

[0004] And in a small part of insulation cabinet, circuit breaker and the sleeve, cable sleeve and other circuit components adopt extractable structure, but for the circuit breaker of these insulation cabinets, the solid-encapsulated pole adopts structure form similar to "F" type structure, "H" type structure after overturning, and is fixed on the support seat in cantilevered mode. The rigidity of the above structure is not high, and in the long-term service process, the electric force caused by circuit failure and external force generated when circuit is plugged will repeatedly stress the cantilever end, so that the internal structure of solid-encapsulated pole is loose due to bending moment, and the looseness of this structure is accumulated day by day, which is a security risk that cannot be ignored for high voltage working circuit. SUMMARY

[0005] The utility model provides a kind of solid-encapsulated pole to solve the main technical problems, it is extracted in type, while meeting with bus sleeve, cable sleeve and other electrical components are extracted in type connection, using more stable structure form, to be more reliably fixed on the support seat of circuit breaker.

[0006] In order to solve the above technical problems, the utility model provides a kind of solid-encapsulated pole extracted in type, is installed on the support structure of solid insulation cabinet circuit breaker "L" type;The solid-encapsulated pole includes disconnector and vacuum switch;

[0007] The disconnector includes ground terminal;The first outgoing conductor of the disconnector extends out in axial direction at one end away from the ground terminal;

[0008] The vacuum switch is vertically and fixedly connected to the disconnector at one end, and the disconnector and the vacuum switch are integrally formed into "T" type structure;

[0009] The vacuum switch extends out a second outgoing conductor laterally; the second outgoing conductor is oriented in the same direction as the first outgoing conductor and is parallel to the first outgoing conductor in the axial direction;

[0010] When the solid-sealed pole is mounted on the support structure, the grounding end of the disconnector is perpendicularly fixed to the vertical part of the support structure, and the end of the vacuum switch away from the disconnector is perpendicularly fixed to the horizontal part of the support structure.

[0011] In a preferred embodiment, the first outgoing conductor is used to connect with a busbar bushing in a busbar chamber of a solid insulation cabinet; the second outgoing conductor is used to connect with a cable bushing in a cable chamber of the solid insulation cabinet.

[0012] The relative positions between the first outgoing conductor and the second outgoing conductor are matched with the relative positions between the busbar bushing and the cable bushing.

[0013] In a preferred embodiment, the first outgoing conductor is peripherally provided with a first taper surface; the first taper surface is matched with the inner wall of a taper connection slot of the busbar bushing.

[0014] The second outgoing conductor is peripherally provided with a second taper surface; the second taper surface is matched with the inner wall of a taper connection slot of the cable bushing.

[0015] In a preferred embodiment, the disconnector is sequentially and spacedly provided with a grounding conductor, an isolation conductor and the first outgoing conductor in the axial direction; the grounding conductor is arranged on the side close to the grounding end.

[0016] The disconnector is further provided with a sliding contact; the sliding contact slides in the axial direction of the disconnector and is used to conduct or disconnect the electrical connection between the grounding conductor and the isolation conductor or between the isolation conductor and the first outgoing conductor.

[0017] In a preferred embodiment, the vacuum switch is provided with an arc-extinguishing chamber on the side close to the disconnector.

[0018] The arc-extinguishing chamber is provided with a static contact and a dynamic contact in the axial direction; the static contact is electrically connected with the isolation conductor; the dynamic contact is electrically connected with the second outgoing conductor.

[0019] The dynamic contact slides in the axial direction of the arc-extinguishing chamber to abut or leave the static contact.

[0020] In a preferred embodiment, the disconnector is provided with a grounding sleeve between the grounding conductor and the isolation conductor and an isolation sleeve between the isolation conductor and the first outgoing conductor.

[0021] The ground sleeve extends a visible window radially outward; the visible window is used to observe the position of the sliding contact.

[0022] In a preferred embodiment, the ground conductor extends a ground port radially outward; when the sealed pole is installed on the support structure, the ground port is independent of the support structure.

[0023] In a preferred embodiment, the isolating switch is wrapped with an insulating sleeve around the periphery of the vacuum switch.

[0024] In a preferred embodiment, the surface of the insulating sleeve is solidified with a semiconductive shielding layer.

[0025] The utility model also provides a circuit breaker, including the above-mentioned one kind can draw out type sealed pole.

[0026] Compared with the prior art, the technical scheme of the utility model has the following beneficial effects:

[0027] The utility model provides the above-mentioned can draw out type sealed pole, not only can with bus sleeve, cable sleeve realizes detachable connection, to make things convenient for taking out alone and maintaining, thereby reduce the after-sales operation and maintenance cost of solid insulation cabinet, and adopt " T " type structure, have higher structural stability, realize with circuit breaker support structure more reliable static determinate connection, greatly reduce the security risk caused by structural looseness to high voltage circuit.

[0028] The utility model provides the above-mentioned can draw out type sealed pole, the ground conductor of isolating switch is provided with independent ground port, and the insulating sleeve is poured around the ground port, not only avoids the problem of inconvenient installation of the ground conductor, but also improves the insulation performance at the ground port.

[0029] The utility model provides the above-mentioned can draw out type sealed pole, the visible window extends the lateral direction of the ground sleeve, is convenient for user to observe the position of the sliding contact, thereby judges the conducting state of the isolating switch, improves the practicability of the sealed pole. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is the sectional view schematic drawing of the sealed pole of the utility model embodiment one for the sealed pole of the utility model embodiment one to install in support structure;

[0031] Figure 2 It is the sectional view schematic drawing of the sealed pole of the utility model embodiment one for the sealed pole of the utility model embodiment one to install in support structure;

[0032] Figure 3 It is the sectional view schematic drawing of the sealed pole of the utility model embodiment one for the sealed pole of the utility model embodiment one to install in support structure;

[0033] Figure 4 It is the section view schematic drawing when the solid-sealed pole is connected with the bus sleeve and the cable sleeve in the embodiment one of the utility model;

[0034] Figure 5 It is the three-dimensional schematic view of the circuit breaker in the embodiment two of the utility model.

[0035] In the figure, marked: 1 - the solid-sealed pole can be extracted, 11 - the disconnecting switch, 111 - the grounding cavity, 1111 - the grounding conductor, 11111 - the grounding port, 1112 - the grounding sleeve, 11122 - the visual window, 112 - the isolation cavity, 1121 - the isolation conductor, 113 - the closing cavity, 1131 - the isolation sleeve, 114 - the first outgoing conductor, 1141 - the first taper surface, 1142 - the first arc-shaped chamfer, 115 - the moving contact assembly, 1151 - the screw rod, 1152 - the sliding contact body, 1153 - the reversing transmission part, 116 - the contact finger spring, 12 - the vacuum switch, 121 - the arc-extinguishing chamber, 1211 - the static contact, 1212 - the moving contact, 1213 - the arc-extinguishing cover, 1214 - the voltage-sharing cover, 122 - the conducting chamber, 123 - the second outgoing conductor, 1231 - the second taper surface, 1232 - the second arc-shaped chamfer, 13 - the connecting conductor, 14 - the insulating rubber sleeve, 2 - the support structure, 21 - the end plate, 22 - the base, 3 - the bus sleeve, 31 - the wiring slot, 32 - the end face chamfer, 4 - the cable sleeve, 5 - the circuit breaker, 51 - the support base. DETAILED DESCRIPTION

[0036] The technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model; obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments; based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative efforts belong to the range protected by the utility model.

[0037] In the description of the utility model, it needs to be explained that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0038] In the description of the utility model, it needs to explain, unless another explicit provision and limitation, the term "installation", "set with", "sleeve set / interface", "connection" and so on, should do broad sense understanding, for example "connection", can be wall-mounted connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be directly connected, also can be indirectly connected through intermediate medium, can be two elements inside the communication, for ordinary skilled in the art, can be understood according to the specific circumstances the specific meaning of the above-mentioned term in the utility model.

[0039] Embodiment one

[0040] As Figures 1-4 The utility model embodiment provides a kind of extractable solid seal pole 1, statically determinate is fixed on the support structure 2 of solid insulation cabinet circuit breaker. Specifically, the support structure 2 includes "L" type base 22, and end plate 21 vertically arranged on the base 22;The solid seal pole 1 includes disconnecting switch 11 and vacuum switch 12, and the disconnecting switch 11 is provided with ground terminal. The top of the vacuum switch 12 is vertically connected to the side of the disconnecting switch 11, and the disconnecting switch 11 and the vacuum switch 12 are integrally configured as "T" type structure. When the solid seal pole 1 is installed on the support frame, the ground terminal of the disconnecting switch 11 is vertically fixed to the end plate 21, and the bottom of the vacuum switch 12 is vertically fixed to the horizontal section of the base 22. In this way, the solid seal pole 1 is stably fixed to the support structure 2. Further, the disconnecting switch 11 extends out first outgoing conductor 114 in axial direction from the end away from the ground terminal, and the vacuum switch 12 extends out second outgoing conductor 123 in lateral direction. The second outgoing conductor 123 is oriented in the same direction as the first outgoing conductor 114, and is axially parallel to each other. In the embodiment, the first outgoing conductor 114 is used to connect with bus duct 3 in the bus duct room of solid insulation cabinet, and the second outgoing conductor 123 is connected with cable duct 4 in the cable room of solid insulation cabinet. Therefore, the relative position between the first outgoing conductor 114 and the second outgoing conductor 123 matches the relative position between the bus duct 3 and the cable duct 4. In this way, by moving the solid seal pole 1 in the axial direction of the disconnecting switch 11, extractable connection with the bus duct 3 and the cable duct 4 can be realized.

[0041] Now, the structure and connection relationship of each component of the solid seal pole 1 will be further described with reference to the drawings.

[0042] As Figures 1-3As shown, the isolator 11 adopts a direct-acting three-position isolation structure, and sequentially has a grounding cavity 111, an isolation cavity 112 and a closing cavity 113 in the axial direction. The closing cavity 113 extends out of the first outgoing conductor 114 in the axial direction away from the isolation cavity 112. The first outgoing conductor 114 is a male joint.

[0043] The grounding cavity 111 is provided with a grounding conductor 1111 on the side close to the end plate 21, and the grounding conductor 1111 is fixed to the end plate 21 by bolts. It can be understood that the isolator 11 is provided with one end of the grounding cavity 111, i.e. the grounding end described above. In the prior art, when the sealed pole 1 is installed on the support structure 2, the grounding port 11111 of the grounding conductor 1111 is arranged in the end plate 21. In this way, the grounding conductor 1111 not only lacks sufficient insulation protection at the wiring position, but also needs to be matched with the end plate 21 in structure and process during installation, which is particularly inconvenient. In the present embodiment, the grounding port 11111 independently extends out from the upper side of the grounding conductor 1111, and like other components of the isolator 11, is peripherally cast with an insulating sleeve 14. The optimization here not only avoids the problem of inconvenient installation of the grounding conductor 1111, but also improves the insulation performance of the grounding port 11111. The grounding sleeve 1112 is arranged between the grounding conductor 1111 and the isolation cavity 112 to form a vacuum cavity of the grounding cavity 111. It is necessary that the grounding sleeve 1112 has better insulation and connection sealing performance. In particular, in the present embodiment, the grounding sleeve 1112 extends out of a viewing window 11122 on the upper side, so as to facilitate timely acquisition of the conduction state of the isolator 11. In order not to affect the vacuum environment in the grounding cavity 1111, the top of the viewing window 11122 is sealed by a transparent material such as glass or acrylic.

[0044] The closing cavity 113 is arranged at one end close to the first outgoing conductor 114, and forms a vacuum cavity through an isolation sleeve 1131. One end of the isolation sleeve 1131 is in sealed connection with the first outgoing conductor 114. In the isolation cavity 112 between the grounding cavity 111 and the closing cavity 113, a full-length isolation conductor 1121 is arranged in the axial direction. One end of the isolation conductor 1121 is in sealed connection with the grounding sleeve 1112, and the other end is in sealed connection with the isolation sleeve 1131. At the connection between the isolator 11 and the vacuum switch 12, the isolation conductor 1121 extends out of a connecting conductor 13 on the side facing the vacuum switch 12, and the connecting conductor 13 extends into the arc-extinguishing chamber 121 of the vacuum switch 12 to realize the electrical connection between the isolator 11 and the vacuum switch 12.

[0045] To understand the three-position isolation operation mode of the disconnecting switch 11, the structure and mechanical fit of the moving contact assembly 115 will now be described. For example... Figures 1-2 As shown, the moving contact assembly 115 includes a lead screw 1151, a sliding contact 1152, and a reversing transmission member 1153. It should be understood that the disconnecting switch 11, from the end plate 21 to the first outgoing conductor 114, should be constructed as a hollow structure to provide the necessary axial space for the installation of the lead screw 1151 and the movement of the sliding contact 1152. The lead screw 1151 extends along the axial direction of the disconnecting switch 11, and one end is rotatably connected to the end plate 21 via the reversing transmission member 1153. This connection method is a common existing technology or its alternatives, and will not be elaborated upon here. The sliding contact 1152 is sleeved on the outer periphery of the lead screw 1151, and achieves a sealed sliding connection with the lead screw 1151 along the axial direction through a threaded engagement. When the lead screw 1151 rotates under the drive of the drive device inside the end plate 21, it achieves reversing transmission through threaded engagement with the sliding contact 1152, pushing the sliding contact 1152 to move along the axial direction of the disconnect switch 11. Necessarily, the length of the sliding contact 1152 is not less than the net distance between the grounding conductor 1111 and the disconnecting conductor 1121, and not less than the net distance between the disconnecting conductor 1121 and the first outgoing conductor 114. When one end of the sliding contact 1212 contacts the grounding conductor 1111, its other end will inevitably contact the isolating conductor 1121, at which point the disconnect switch 11 is in the grounding closed state. When the sliding contact 1152 moves away from the end plate 21 to leave the grounding conductor 1111 and does not contact the first outgoing conductor 114, the disconnect switch 11 is in the grounding open state. When the sliding contact 1152 continues to move in the same direction until one end abuts the first outgoing conductor 114, its other end will inevitably contact the isolating conductor 1121, at which point the disconnect switch 11 is in the isolating closed and grounding open state. This is the three-position isolation working mode of the disconnect switch 11. It can be understood that by switching the rotation direction of the lead screw 1151 to push the sliding contact 1152 to move in the opposite direction, the disconnect switch 11 still follows the three-position isolation working mode. It is not difficult to solve that, in this working mode, the grounding conductor 1111, the isolation conductor 1121 and the first outgoing conductor 114 can be defined as fixed contacts.

[0046] To ensure good contact between the sliding contact 1152 and each fixed contact, the cross section of the hollow cavity in the fixed contact should match the cross section of the sliding contact 1152. However, due to manufacturing errors and wear during use, a small gap between the sliding contact 1152 and each fixed contact is inevitable, which affects the stability of the contact. Therefore, as shown in Figures 1-2 the end of each fixed contact is provided with a finger spring 116. The finger spring 116 is pre-tightened so that its inner diameter is slightly smaller than the diameter of the sliding contact 1152. When the sliding contact 1152 penetrates into the finger spring 116, the finger spring 116 is stretched to generate an inward elastic force, thereby holding the sliding contact 1152. In this way, a stable and reliable conductive loop is formed between the sliding contact 1152 and each fixed contact. In other embodiments, a circle of elastic fingers can also be provided on the surface of the sliding contact 1152 in the circumferential direction, and the surface of the elastic fingers is smoothly transitioned with the sliding contact 1152. When the sliding contact 1152 enters the hollow cavity of each fixed contact, the elastic fingers are pressed inward to abut against the surface of the fixed contact, and a stable conductive loop can also be formed between the sliding contact 1152 and each fixed contact.

[0047] As Figures 1-2As shown, the vacuum switch 12 includes an arc extinguishing chamber 121 and a conducting chamber 122. A pull rod structure is arranged axially in the conducting chamber 122. A static contact 1211 and a dynamic contact 1212 are arranged axially in the arc extinguishing chamber 121. The static contact 1211 is fixed on a side close to the disconnecting switch 11 and connected with the connecting conductor 13. The dynamic contact 1212 is arranged on a side close to the conducting chamber 122 and reciprocally slides along the axial direction of the arc extinguishing chamber 121 under the drive of the pull rod structure to abut or separate from the static contact 1211. The vacuum switch 12 extends out of the second outgoing conductor 123 in a lateral direction, and the end of the outgoing conductor is electrically connected with the dynamic contact 1212 through a flexible connecting piece. In this way, when the pull rod structure pushes the dynamic contact 1212 to abut against the static contact 1211, the circuit between the second outgoing conductor 123 and the isolated conductor 1121 in the disconnecting switch 11 is turned on. When the pull rod structure pulls the dynamic contact 1212 away from the static contact 1211, the circuit between the second outgoing conductor 123 and the isolated conductor 1121 is cut off. The vacuum cavity in the arc extinguishing chamber 121 is formed by an arc extinguishing cover 1213. The material of the arc extinguishing cover 1213 can be ceramic, metal, resin-based composite material, glass fiber composite material, etc., which is not limited in the prior art. A uniform cover is arranged on the outer periphery of the arc extinguishing cover 1213, which can reduce the uneven distribution of electric field, thereby reducing the insulation breakdown caused by partial discharge and improving the insulation performance and breaking stability of the arc extinguishing chamber 121.

[0048] As shown in the drawings, Figures 1-2 As shown, an insulating rubber sleeve 14 is integrally cast on the outer periphery of the disconnecting switch 11 and the vacuum switch 12 to realize the solid full insulation of the solid sealed pole 1. In this example, the disconnecting switch 11 and the vacuum switch 12 integrally form a "T" structure, so the insulating rubber sleeve 14 not only plays an insulating role, but also plays an important structural support role for the disconnecting switch 11 and the vacuum switch 12, especially for the vertical intersection of the two. In this embodiment, the insulating rubber sleeve 14 adopts epoxy resin with high breakdown strength and toughness. Additionally, a semiconductive shielding layer is solidified on the surface of the insulating rubber sleeve 14. The semiconductive shielding layer can more evenly disperse the electric charge to the surface of the insulator to reduce the strength of the local electric field, and realize reliable electric field shielding effect on the surface of the solid sealed pole 1, thereby improving the safety in use. In this embodiment, the semiconductive shielding layer adopts a micro-nano aqueous semiconductive material.

[0049] In the embodiment, the support structure 2 comprises a "L" shaped base 22 and the end plate 21 as described above. The end plate 21 is vertically arranged on the top of the base 22. It can be understood that in other embodiments, the end plate 21 and the vertical section of the base 22 can be integrated. For the existing solid sealed pole, the fixing mode of the disconnecting switch 11 and the vacuum switch 12 is generally two kinds: (1) the disconnecting switch 11 and the vacuum switch 12 are arranged in axial parallel, and the end part of the disconnecting switch 11 and the vacuum switch 12 away from the outgoing conductor is fixed on the end plate 21, and the solid sealed pole is approximately "H" shaped structure after being turned over 90°; (2) the vacuum switch 12 is vertically fixed on the horizontal section of the base 22 and extends a section of outgoing conductor at half height, and the disconnecting switch 11 extends horizontally from the top of the vacuum switch 12, and the solid sealed pole is "F" shaped structure. No matter which structure, it is cantilevered fixed on the support structure 2. In the long-term service process, the electric force caused by circuit failure and the external force generated during plugging will repeatedly stress the cantilevered end, so that the internal structure of the solid sealed pole is loose due to the bending moment, and the structural looseness accumulates day by day, which is a security risk that cannot be ignored for high-voltage working circuit.

[0050] Therefore, in the embodiment, the solid sealed pole 1 adopts "T" shaped structure, one end of the disconnecting switch 11 provided with the grounding cavity 111 is vertically fixed on the end plate 21, the top of the vacuum switch 12 is vertically connected with the disconnecting switch 11, and the bottom is fixed on the horizontal section of the base 22. In this way, the solid sealed pole 1 is statically determinate fixed on the support structure 2. And for the vertical intersection of the disconnecting switch 11 and the vacuum switch 12, the reinforcing effect of the insulating sleeve 14 makes up for the structural weakness of the intersection, so that the solid sealed pole 1 has higher structural rigidity. In addition, the isolation conductor 1121, the connecting conductor 13, the static contact 1211 and the arc extinguishing cover 1213 can adopt integrated structure, which can also improve the structural rigidity of the intersection. Compared with the prior art, it is obvious that the "T" shaped solid sealed pole 1 provided by the embodiment has higher structural stability, and the connection with the support structure 2 is more reliable, which greatly reduces the security risk caused by structural looseness to high-voltage circuit.

[0051] As Figure 4As shown, in this embodiment, the first outgoing conductor 114 is connected to the busbar bushing 3 in the busbar compartment, and the second outgoing conductor 123 is connected to the cable bushing 4 in the cable compartment. The busbar bushing 3 and the cable bushing 4 are arranged parallel to each other along the axial direction. Therefore, for the solid-sealed pole 1, the first outgoing conductor 114 and the second outgoing conductor 123 are arranged parallel to each other along the axial direction, and their relative positions match the relative positions of the busbar bushing 3 and the cable bushing 4. In this way, by moving the solid-sealed pole 1 along the axial direction of the disconnecting switch 11, a removable connection can be achieved between the solid-sealed pole 1 and the busbar bushing 3 and the cable bushing 4. Further, taking the detailed structural fit between the first outgoing conductor 114 and the busbar bushing 3 as an example, the high docking accuracy between the solid-sealed pole 1 and the busbar bushing 3 and the cable bushing 4 is demonstrated. For the existing busbar bushing 3, the inner wall of its wiring groove 31 is often constructed as a cone. Therefore, correspondingly, the first outgoing conductor 114 has a first conical surface 1141 constructed on its outer periphery, which fits with the second conical surface 1231. In addition, the end face of the busbar bushing 3 in the wiring groove 31 is chamfered. For ease of explanation below, this chamfer is defined as the end face chamfer 32. The first outgoing conductor 114 has a first arc-shaped chamfer 1142 at its end to fit with the end face chamfer 32. After the first outgoing conductor 114 is initially aligned with the wiring groove 31 of the busbar bushing 3 by the first conical surface 1141, it is then precisely fitted into the inside of the busbar bushing 3 by means of the structural alignment between the first arc-shaped chamfer 1142 and the end face chamfer 32. Similarly, the second outgoing conductor 123 also has a second conical surface 1231 on its outer periphery and a second arc-shaped chamfer 1232 at its end. The detailed structural fit between it and the cable sleeve 4 is consistent with the detailed structural fit between the first outgoing conductor 114 and the busbar sleeve 3.

[0052] Example 2

[0053] like Figure 5 As shown, this embodiment provides a circuit breaker 5, including an "L"-shaped support base 51 and at least one removable solid-sealed pole 1 as described in Embodiment 1.

[0054] For ease of description, the orientation of the support base 51 is defined below. The horizontal direction of the support base 51, parallel to the axis of the disconnecting switch 11, is defined as the width direction, and its horizontal direction, perpendicular to the axis of the disconnecting switch 11, is defined as the length direction.

[0055] like Figure 5As shown, in the embodiment, the number of the solid-sealed pole 1 is three. The three solid-sealed poles 1 are arranged at intervals along the length direction of the support base 51. It can be understood that the support base 51 can be the support structure 2 in the first embodiment. Therefore, the connection mode of the solid-sealed pole 1 and the support base 51 is the same as the connection mode of the solid-sealed pole 1 and the support structure 2 in the first embodiment. After the three solid-sealed poles 1 are fixed to the support base 51, the three solid-sealed poles 1 are respectively connected to the A-phase bus sleeve, the B-phase bus sleeve and the C-phase bus sleeve in the solid insulation cabinet bus room through the first outgoing conductor 114 in a withdrawable mode.

[0056] It can be understood that the number of the solid-sealed pole 1 should not be limited. In other embodiments, the number of the solid-sealed pole 1 can be one, two or even more.

[0057] The above merely describes the preferred embodiments of the present application, and is not intended to limit the patent scope of the present application. Any equivalent transformation made by using the content of the present application description shall fall within the protection scope of the present application.

Claims

1. An extractable dead tank pole mounted on a support structure of a solid insulation "L" type circuit breaker, characterized in that: The isolating switch and the vacuum switch are included; The isolating switch includes a grounding end; one end of the isolating switch away from the grounding end extends out a first outgoing conductor in an axial direction; The vacuum switch is vertically fixed to one end of the isolating switch, and the isolating switch and the vacuum switch are integrally configured as a "T" type structure; The vacuum switch extends out a second outgoing conductor in a lateral direction; the second outgoing conductor is parallel to the first outgoing conductor in an axial direction and has the same direction as the first outgoing conductor; When the solid sealed pole is installed on the support structure, the grounding end of the isolating switch is vertically fixed to a vertical part of the support structure, and one end of the vacuum switch away from the isolating switch is vertically fixed to a horizontal part of the support switch.

2. An extractable deadfront pole as claimed in claim 1, characterised in that: The first outgoing conductor is used to be connected with a bus bushing in a bus chamber of a solid insulation cabinet; the second outgoing conductor is used to be connected with a cable bushing in a cable chamber of the solid insulation cabinet; The relative positions between the first outgoing conductor and the second outgoing conductor are matched with the relative positions between the bus bushing and the cable bushing.

3. An extractable deadfront pole as claimed in claim 2, characterised in that: The first outgoing conductor is configured with a first taper surface on an outer periphery; the first taper surface is matched with an inner wall of a taper connection slot of the bus bushing; The second outgoing conductor is configured with a second taper surface on an outer periphery; the second taper surface is matched with an inner wall of a taper connection slot of the cable bushing.

4. An extractable deadfront pole as defined in claim 1, wherein: The isolating switch is sequentially and spacedly provided with a grounding conductor, an isolating conductor and the first outgoing conductor in an axial direction; the grounding conductor is arranged on a side close to the grounding end; The isolating switch is further provided with a sliding contact; the sliding contact slides in an axial direction of the isolating switch and is used to conduct or disconnect the electrical connection between the grounding conductor and the isolating conductor or between the isolating conductor and the first outgoing conductor.

5. An extractable deadfront pole as claimed in claim 4, characterised in that: The vacuum switch is provided with an arc extinguishing chamber on a side close to the isolating switch; The arc extinguishing chamber is provided with a static contact and a dynamic contact in an axial direction; the static contact is electrically connected with the isolating conductor; the dynamic contact is electrically connected with the second outgoing conductor; The dynamic contact slides in an axial direction of the arc extinguishing chamber to abut or leave the static contact.

6. An extractable deadfront pole as claimed in claim 4, characterised in that: The isolating switch is provided with a grounding sleeve between the grounding conductor and the isolating conductor and an isolating sleeve between the isolating conductor and the first outgoing conductor; The grounding sleeve extends out a visible window outward in a radial direction; the visible window is used to observe the position of the sliding contact.

7. An extractable deadfront pole as claimed in claim 4, characterised in that: The grounding conductor extends out a grounding port outward in a radial direction; when the solid sealed pole is installed on the support structure, the grounding port is independent of the support structure.

8. An extractable deadfront pole as defined in claim 1, wherein: The isolating switch and the vacuum switch are wrapped with an insulating rubber sleeve on an outer periphery.

9. An extractable deadfront pole as claimed in claim 8, characterised in that: A semiconductive shielding layer is solidified on a surface of the insulating rubber sleeve.

10. A circuit breaker characterized by: The solid sealed pole includes the one according to any one of claims 1-9.

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