Solid-sealed polar pole with load on-off and isolation grounding functions

Abstract

The invention discloses a solid-sealed polar pole with load on-off and isolation grounding functions, which belongs to the technical field of solid-sealed polar poles and comprises a load switch vacuum arc-extinguishing chamber, an isolation switch vacuum arc-extinguishing chamber and a grounding switch vacuum arc-extinguishing chamber. The load switch vacuum arc-extinguishing chamber, the isolation switch vacuum arc-extinguishing chamber, the grounding switch vacuum arc-extinguishing chamber, the upper outgoing line, the moving end lap-joint outgoing line, the static end lap-joint outgoing line and the lower outgoing line are all fixedly sealed in an epoxy resin shell by epoxy resin through an APG technology, and it is guaranteed that the insulation performance of the load switch, the isolation switch and the grounding switch meets the requirement for miniaturization. Meanwhile, the assembly workload of a user load switch, an isolating switch and a grounding switch is simplified, and quality control and batch production are facilitated. The load switch, the isolating switch and the grounding switch use vacuum arc extinguish chambers, vacuum is used as an insulating medium, the insulating property is good, a vacuum fracture insulating gap is smaller than an air fracture insulating gap, and finally miniaturization of an operating mechanism and miniaturization of the whole switch cabinet are facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of design and manufacturing of solid-sealed poles, and in particular relates to a solid-sealed pole with load breaking and isolation grounding functions. Background Art

[0002] In the field of high-voltage switches, AC metal-enclosed switchgear is widely used in power plants, power systems, petrochemical, metallurgical and other industrial and mining enterprises and electrification systems. Currently, the most widely used products are AC metal-enclosed switchgear with air insulation, which is large in size, occupies a large building area, is sensitive to ambient air quality, and is difficult to adapt to the operating conditions in southern my country, Yanhai area and underground places. Power outages caused by insulation problems occur from time to time, and in severe cases, the entire row of switchgear is burned.

[0003] At present, the load switch, disconnector and grounding switch in the AC metal-enclosed switchgear mainly insulated by air are installed and arranged independently. The load switch uses vacuum insulation in the vacuum interrupter to realize the switching function. The disconnector and grounding switch are insulated by air, with a large insulation distance and a large product volume. The metal-enclosed switchgear mainly insulated by SF6 gas or environmentally friendly gas mostly adopts a multi-chamber structure, where the load switch is one gas chamber and the disconnector and grounding switch is one gas chamber. The product structure is complex and the production cost is high.

[0004] With the iterative upgrade of insulation technology, the use of vacuum breaking and insulation technology in the medium and high voltage fields has become more and more widely used, and the technology has become more and more mature. A high-voltage switch that can meet the insulation requirements and achieve miniaturization and maintenance-free has become an important research topic in the switch industry. In order to meet the requirements of overall miniaturization, high safety, and high reliability of high-voltage switchgear, and to consider environmental friendliness, the research and development of components with insulation performance for electrical switchgear is imperative. Summary of the invention

[0005] The present invention provides a solid-sealed pole with load breaking and isolation grounding functions, and provides a miniaturized integrated solid-sealed pole with load switch and three-position isolation grounding functions.

[0006] In order to achieve the above object, the present invention adopts the following technical solution: A sealed pole with load breaking and isolation grounding functions, comprising a load switch vacuum interrupter, an isolation switch vacuum interrupter and a grounding switch vacuum interrupter; The load switch vacuum interrupter is provided with a load switch vacuum interrupter static conductive rod and a load switch vacuum interrupter dynamic conductive rod, and the load switch vacuum interrupter static end conductive rod is fixedly connected to the upper outlet line; The isolating switch vacuum interrupter is provided with a static conductive rod of the isolating switch vacuum interrupter and a dynamic conductive rod of the isolating switch vacuum interrupter, and the dynamic conductive rod of the isolating switch vacuum interrupter and the dynamic conductive rod of the load switch vacuum interrupter are both slidably connected with the dynamic end lap outlet line; The grounding switch vacuum interrupter is provided with a grounding switch vacuum interrupter static conductive rod and a grounding switch vacuum interrupter dynamic conductive rod, the grounding switch vacuum interrupter static conductive rod and the static end lap outlet are fixedly connected, and the grounding switch vacuum interrupter dynamic conductive rod and the lower outlet are slidably connected; The load switch vacuum interrupter, the isolating switch vacuum interrupter, the grounding switch vacuum interrupter, the upper outgoing wire, the moving end overlapping outgoing wire, the static end overlapping outgoing wire and the lower outgoing wire are all sealed in the epoxy resin shell by epoxy resin through the APG process.

[0007] Furthermore, the outer side of the upper outgoing line is sealed with epoxy resin to form an incoming line conductive cone, the outer side of the end-lap outgoing line is sealed with epoxy resin to form an outgoing line conductive cone, and the outer side of the lower outgoing line is sealed with epoxy resin to form a grounding outgoing line conductive cone.

[0008] Furthermore, the static end lap wire is provided with three joints, the upper and lower end joints are respectively fastened to the vacuum arc extinguishing chamber of the isolating switch and the vacuum arc extinguishing chamber of the grounding switch, and the middle joint is the pole main circuit wire installation hole.

[0009] Furthermore, the parameters of the load switch vacuum interrupter, the isolating switch vacuum interrupter and the grounding switch vacuum interrupter are the same, and the movement stroke of the load switch vacuum interrupter moving conductive rod, the isolating switch vacuum interrupter moving conductive rod and the grounding switch vacuum interrupter moving conductive rod is the same.

[0010] Furthermore, the moving conductive rod of the load switch vacuum interrupter is operated by a first insulating pull rod, the moving conductive rod of the disconnector vacuum interrupter is operated by a second insulating pull rod, and the moving conductive rod of the grounding switch vacuum interrupter is operated by a pull rod, and the first insulating pull rod, the second insulating pull rod and the chamber where the pull rods are located are connected.

[0011] Furthermore, an air filling hole is provided on the epoxy resin shell.

[0012] Furthermore, the surfaces of the load switch vacuum interrupter, the disconnector vacuum interrupter and the grounding switch vacuum interrupter are all provided with a silicone rubber layer as an elastic buffer layer.

[0013] Furthermore, the movable end lap outlet and the lower outlet are provided with protrusions, and the protrusions are inserted into the silicone rubber layer.

[0014] Furthermore, the protrusion is a triangular protrusion.

[0015] Furthermore, a sealing ring installation groove is provided on the base installation surface of the sealed pole.

[0016] Compared with the prior art, the present invention has at least the following beneficial technical effects: The main conductive components of the present invention, the load switch vacuum interrupter, the isolating switch vacuum interrupter, the grounding switch vacuum interrupter and all the outgoing lines are all sealed with epoxy resin through the APG process to ensure that the insulation performance of the load switch, the isolating switch and the grounding switch meets the requirements of miniaturization, while simplifying the assembly workload of the user's load switch, the isolating switch and the grounding switch, and facilitating quality control and mass production.

[0017] Load switches, disconnectors, and earthing switches use vacuum interrupter chambers and vacuum as the insulating medium, which have good insulation performance. The insulation gap of the vacuum break is reduced to about 1 / 15 of the insulation gap of the air break. Therefore, the movement stroke of the operating mechanism is greatly reduced, which is conducive to the miniaturization of the operating mechanism and the overall miniaturization of the rational switch cabinet.

[0018] Furthermore, the load switch vacuum interrupter, disconnector vacuum interrupter and grounding switch vacuum interrupter use the same model product, with the same installation dimensions and technical parameters, and the same movement stroke of the moving conductive rod, which is conducive to the operating mechanism to achieve the "linkage" or "interlocking" function. The main circuit composed of the load switch and disconnector is a double vacuum break, which realizes the double break isolation after opening, which is conducive to ensuring the insulation level of the isolation position.

[0019] Furthermore, the sealed pole incoming conductive cone, outgoing conductive cone and grounding outgoing conductive cone are used to connect with the outgoing bushing busbar, and the connecting interface is sealed with silicone rubber sleeve and silicone gel, ensuring the insulation level of the vacuum load switch and the isolating and grounding switch to the ground and between phases.

[0020] Furthermore, the three epoxy chambers of the load switch, disconnector and earthing switch are connected close to the mounting base. After the sealing ring is assembled on the mounting surface of the base, the three chambers are sealed with air, and double composite insulation is achieved with the epoxy shell of the sealed pole, which is beneficial to ensure the insulation level of the three vacuum arc extinguishing chambers of the load switch, disconnector and earthing switch to the switch cabinet shell of the mounting base, and at the same time make the phase distance smaller.

[0021] Furthermore, the sealed pole is provided with an inflation hole, and a fixed end for fixing and supporting the inflation tube is integrated, so that the user can install and use it easily. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a main cross-sectional view with load breaking and isolation grounding functions; Figure 2 It is a main view with load breaking and isolation grounding functions; Figure 3 The right side diagram is a load breaking and isolation grounding function; Figure 4 It is a bottom view of a load breaking and isolation grounding function; Figure 5 This is the cross-sectional view of the lapped lead at the moving end; Figure 6 This is the cross-sectional view of the static end lap wire outlet; Figure 7 This is the cross-sectional view of the lower outlet.

[0023] In the figure, 11 is a load switch vacuum interrupter, 12 is a disconnector vacuum interrupter, 13 is a grounding switch vacuum interrupter, 111 is a load switch vacuum interrupter static conductive rod, 112 is a load switch vacuum interrupter dynamic conductive rod, 113 is a load switch vacuum interrupter silicone rubber layer, 121 is a disconnector vacuum interrupter static conductive rod, 122 is a disconnector vacuum interrupter dynamic conductive rod, 123 is a disconnector vacuum interrupter silicone rubber layer, 131 is a grounding switch vacuum interrupter static conductive rod Rod, 132—moving conductive rod of the vacuum interrupter of the grounding switch, 133—silicone rubber layer of the vacuum interrupter of the grounding switch, 2—upper outlet, 21—threaded hole of the upper outlet, 22—center hole of the upper outlet, 3—moving end lap outlet, 31—first center hole of the moving end lap outlet, 32—second center hole of the moving end lap outlet, 33—first "triangle" protrusion of the moving end lap outlet, 34—second "triangle" protrusion of the moving end lap outlet, 35—first annular groove of the moving end lap outlet, 36—second annular groove of the moving end lap outlet. 4—static end lap outlet, 41—pole main circuit outlet installation hole, 42—first static end lap outlet installation hole, 43—second static end lap outlet installation hole, 5—lower outlet, 51—lower outlet threaded hole, 52—lower outlet center hole, 53—lower outlet "triangle" protrusion, 54—lower outlet annular groove, 6—epoxy resin shell, 71—first insulating pull rod, 72—second insulating pull rod, 73—pull rod, 8—pole base installation hole, 9—inflating hole, 91—insert, 1001—sealing ring installation groove, 1002—inlet conductive cone, 1003—outlet conductive cone, 1004—grounding outlet conductive cone, 2001—first slider, 2002—second slider, 2003—third slider, 3001—first spring contact finger, 3002—second spring contact finger, 3003—third spring contact finger. DETAILED DESCRIPTION

[0024] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0026] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be another element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be another element centered thereon at the same time. The terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc. used herein indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0028] The present invention provides a sealed pole for a miniaturized integrated load switch and a three-position isolating / earthing switch for a high-voltage switch cabinet.

[0029] Reference Figures 1 to 4A miniaturized integrated sealed pole for a high-voltage switch cabinet includes a load switch vacuum interrupter 11, an isolating switch vacuum interrupter 12 and an earthing switch vacuum interrupter 13 for the functions of a load switch, an isolating switch and an earthing switch, a first insulating pull rod 71 and a second insulating pull rod 72 required for the operation of the load switch and the isolating switch, an upper outlet 2 connected to the load switch vacuum interrupter 11, a moving end lapped outlet 3 connected in series with the load switch vacuum interrupter 11 and the isolating switch vacuum interrupter 12, a static end lapped outlet 4 connected in series with the isolating switch vacuum interrupter 12 and the earthing switch vacuum interrupter 13, a lower outlet 5 connected to the earthing switch vacuum interrupter 13, spring contacts and sliders required for sliding connection between all outlets and the vacuum interrupter, an incoming line conductive cone 1002, an outgoing line conductive cone 1003, a grounding line conductive cone 1004 and an epoxy resin shell 6 for insulation and support. All of the above components are integrated into the sealed pole to form a multifunctional one-piece sealed pole, which realizes the functions of load opening and closing, isolation and grounding of the switch.

[0030] The load switch vacuum interrupter, disconnector vacuum interrupter, grounding switch vacuum interrupter and all outgoing lines are sealed by liquid epoxy resin automatic pressure gelling (APG) process.

[0031] The load switch includes a load switch vacuum interrupter 11 with load breaking and closing functions, a load switch vacuum interrupter static conductive rod 111, a load switch vacuum interrupter moving conductive rod 112, a load switch vacuum interrupter silicone rubber layer 113, an upper outlet 2 connected to the load switch vacuum interrupter static conductive rod 111, a moving end lap outlet 3 connected to the load switch vacuum interrupter moving conductive rod 112, a first spring contact finger 3001 and a first slider 2001, and a first insulating pull rod 71 for operating the load switch vacuum interrupter moving conductive rod 112.

[0032] The isolating switch comprises an isolating switch vacuum interrupter 12 with a splitting function, a static conductive rod 121 of the isolating switch vacuum interrupter, a dynamic conductive rod 122 of the isolating switch vacuum interrupter, a silicone rubber layer 123 of the isolating switch vacuum interrupter, a static end lapped outgoing line 4 connected to the static conductive rod 121 of the isolating switch vacuum interrupter, a dynamic end lapped outgoing line 3 connected to the dynamic conductive rod 122 of the isolating switch vacuum interrupter, a second spring contact finger 3002 and a second slider 2002, and a second insulating pull rod 72 for operating the dynamic conductive rod of the isolating switch vacuum interrupter.

[0033] The grounding switch comprises a grounding switch vacuum interrupter 13 with a splitting function, a static conductive rod 131 of the grounding switch vacuum interrupter, a dynamic conductive rod 132 of the grounding switch vacuum interrupter, a silicone rubber layer 133 of the grounding switch vacuum interrupter, a static end lapped lead 4 connected to the static conductive rod 131 of the grounding switch vacuum interrupter, a lower lead connected to the dynamic conductive rod 132 of the grounding switch vacuum interrupter, a third spring contact finger 3003 and a third slider 2003, and a pull rod 73 for operating the dynamic end of the grounding switch vacuum interrupter.

[0034] The moving and static conductive rods of the vacuum interrupter with the functions of load switch, disconnector and grounding switch are provided with threaded holes for connection. The load switch vacuum interrupter 11, the disconnector vacuum interrupter 12 and the grounding switch vacuum interrupter 13 are respectively provided with a load switch vacuum interrupter silicone rubber layer 113, a disconnector vacuum interrupter silicone rubber layer 123 and a grounding switch vacuum interrupter silicone rubber layer 133 for buffering when sealing epoxy resin.

[0035] The upper outlet 2 and the static end lap outlet 4 are provided with screw mounting holes.

[0036] The moving end lap outlet 3 and the lower outlet 5 are provided with annular grooves for installing spring contact fingers.

[0037] Both the moving end lap outlet 3 and the lower outlet 5 are provided with "triangular" protrusions; the "triangular" protrusions are interference fit with the silicon rubber layer of the vacuum interrupter chamber, and are used for sealing the epoxy resin during the pole sealing process.

[0038] The first insulating rod 71 and the second insulating rod 72 connected to the load switch vacuum interrupter 11 and the disconnector vacuum interrupter 12 have the same structural dimensions and are capable of withstanding high voltages; the rod 73 connected to the grounding switch vacuum interrupter 13 is not capable of withstanding high voltages.

[0039] The sealed pole is provided with an inflation hole 9 near the mounting base. The inflation hole 9 is pre-embedded and sealed in epoxy resin with a metal insert for filling the inner cavity of the pole with environmentally friendly gas; the metal insert is provided with an internal thread for the customer to install the inflation pipeline; the inner cavity of the pole has three through chambers near the mounting base, which are respectively used to accommodate the first insulating pull rod 71, the second insulating pull rod 72 and the pull rod 73.

[0040] An annular sealing ring installation groove 1001 is provided on the installation surface of the sealed pole base for installing the sealing ring to achieve the sealing function in the inner cavity of the pole.

[0041] The interior of the sealed pole incoming line conductive cone 1002 is the upper outgoing line 2, the interior of the outgoing line conductive cone 1003 is the lower outgoing line 5, the interior of the grounding outgoing line conductive cone 1004 is the static end lap outgoing line 4, and is provided with mounting threaded holes for lap-connecting busbars in the user's switch cabinet, and the surface is an epoxy resin layer for insulation protection.

[0042] The upper outgoing line 2, the load switch vacuum interrupter 11, the dynamic end lapped outgoing line 3, the isolating switch vacuum interrupter 12, the static end lapped outgoing line 4 and the switch cabinet inlet and outlet bushing busbar constitute the main current diversion circuit, realizing the main circuit load breaking, closing, isolating and splitting functions. The static end lapped outgoing line 4, the grounding switch vacuum interrupter 13, the lower outgoing line 5 and the switch cabinet grounding bushing busbar constitute the grounding circuit, realizing the grounding circuit splitting and closing function, and is used for users to ground the switch load.

[0043] The following are specific embodiments. It should be noted that these embodiments are preferred examples of the present invention and are used for those skilled in the art to understand the present invention, but the present invention is not limited to these embodiments.

[0044] This embodiment provides a sealed pole with load breaking and isolation grounding functions, including a load switch vacuum interrupter 11, an isolation switch vacuum interrupter 12, and an earthing switch vacuum interrupter 13. The load switch vacuum interrupter 11 and the isolation switch vacuum interrupter 12 are arranged at the same level.

[0045] The load switch vacuum interrupter 11 is provided with a load switch vacuum interrupter static conductive rod 111 and a load switch vacuum interrupter dynamic conductive rod 112 , and the inner wall of the load switch vacuum interrupter 11 is provided with a load switch vacuum interrupter silicone rubber layer 113 .

[0046] The static end conductive rod 111 of the vacuum interrupter of the load switch is fixedly mounted with the upper outlet 2 by means of screws.

[0047] Reference Figure 1 and Figure 5 The moving conductive rod 112 of the load switch vacuum interrupter is coaxially placed with the first center hole 31 of the moving end lap outlet, and is connected through the first spring contact finger 3001 and the first slider 2001.

[0048] The isolating switch vacuum interrupter 12 is provided with an isolating switch vacuum interrupter static conductive rod 121 and an isolating switch vacuum interrupter dynamic conductive rod 122 , and the inner wall of the isolating switch vacuum interrupter 12 is provided with an isolating switch vacuum interrupter silicone rubber layer 123 .

[0049] The movable conductive rod 122 of the vacuum interrupter of the disconnector is coaxially placed with the second central hole 32 of the movable end lap outlet, and is slidably connected via the second spring contact finger 3002 and the second slider 2002 .

[0050] The static conductive rod 121 of the vacuum interrupter of the disconnector is overlapped with the first static end outlet installation hole 42 and is fastened with screws.

[0051] The height of the grounding switch vacuum interrupter 13 is slightly lower than that of the load switch vacuum interrupter 11 and the disconnector vacuum interrupter 12, which is convenient for the subsequent arrangement of the outgoing line side circuit.

[0052] The grounding switch vacuum interrupter 13 is provided with a grounding switch vacuum interrupter static conductive rod 131 and a grounding switch vacuum interrupter dynamic conductive rod 132 , and the inner wall of the grounding switch vacuum interrupter 13 is provided with a grounding switch vacuum interrupter silicone rubber layer 133 .

[0053] The static conductive rod 131 of the vacuum interrupter of the grounding switch is fastened to the second static end lead-out installation hole 43 by means of screws.

[0054] The movable conductive rod 132 of the vacuum interrupter of the grounding switch is coaxially placed with the lower outlet center hole 52 and is slidably connected via the third spring contact finger 3003 and the third slider 2003 .

[0055] Reference Figure 6 The static end lap outlet 4 is an overall special-shaped structure with three joints. The upper and lower ends are respectively provided with a first static end lap outlet installation hole 42 and a second static end lap outlet installation hole 43. The first static end lap outlet installation hole 42 and the second static end lap outlet installation hole 43 are both step holes. The two ends are respectively fastened with the static conductive rod 121 of the vacuum interrupter of the disconnector and the static conductive rod 131 of the vacuum interrupter of the grounding switch by screws. The end of the joint in the middle position is also provided with a pole main circuit outlet installation hole 41.

[0056] The first spring contact finger 3001 and the second spring contact finger 3002 are respectively installed in the first and second annular grooves 35 and 36 of the movable end lapped wire 3. The third spring contact finger 3003 is installed in the lower wire annular groove 54 of the lower wire 5.

[0057] The first insulating pull rod 71 passes through the first slider 2001 and is connected to the movable conductive rod 112 of the load switch vacuum interrupter 11. The second insulating pull rod 72 passes through the second slider 2002 and is connected to the movable conductive rod 122 of the disconnector vacuum interrupter 12. The pull rod 73 passes through the third slider 3002 and is connected to the movable conductive rod 132 of the grounding switch vacuum interrupter 13.

[0058] The moving end lap outlet line 3 is provided with a first "triangular" protrusion 33 of the moving end lap outlet line and a second "triangular" protrusion 34 of the moving end lap outlet line. The first "triangular" protrusion 33 of the moving end lap outlet line penetrates into the silicone rubber layer 113 of the load switch vacuum interrupter 11, and the second "triangular" protrusion 34 of the moving end lap outlet line and the silicone rubber layer 123 of the disconnector vacuum interrupter 12. The lower outlet line 5 is provided with a lower outlet line "triangular" protrusion 53, and the lower outlet line "triangular" protrusion 53 penetrates into the silicone rubber layer 133 of the grounding switch vacuum interrupter 13 to play the role of sealing epoxy resin.

[0059] A threaded hole 21 is provided on the upper outlet 2, and an incoming conductive cone 1002 is formed after being sealed with epoxy resin on the outside, which is used for the user to install the incoming busbar or cable bushing. A center hole 22 is provided through the threaded hole 21, which is used to pass the thread through and install it on the static conductive rod 111 of the load switch vacuum interrupter 11.

[0060] The static end lap outlet 4 is provided with a pole main circuit outlet installation hole 41, and the outer side is sealed with epoxy resin to form an outlet conductive cone 1003 for users to install the outlet busbar and grounding circuit busbar or cable bushing.

[0061] Reference Figure 7 The lower outlet 5 is provided with a lower outlet threaded hole 51, a lower outlet center hole 52, a lower outlet "triangular" protrusion 53 and a lower outlet annular groove 54. The outer side is sealed with epoxy resin to form a grounding outlet conductive cone 1004, which is used for users to install grounding loop busbars or cables. The sealed pole is provided with an inflation hole 9, a pole base mounting hole 8 and a sealing ring mounting groove 1001.

[0062] The load switch vacuum interrupter 11, the isolating switch vacuum interrupter 12, the grounding switch vacuum interrupter 13, the upper outlet 2, the dynamic end lap outlet 3, the static end lap outlet 4, the lower outlet 5, and the insert 91 are all sealed in the epoxy resin shell 6, and the epoxy resin shell 6 plays the role of structural support and external insulation protection. Through epoxy resin sealing, and assembling the first insulating rod 71, the second insulating rod 72, and the rod 73, the above components are integrated into a pole, and the switch cabinet operating mechanism is coordinated with the timing opening and closing of the switch to realize the load opening and closing, isolation opening and closing, and grounding opening and closing functions of the switch.

[0063] The upper outgoing line 2, the load switch vacuum interrupter 11, the moving end overlapping outgoing line 3, the isolating switch vacuum interrupter 12, the static end overlapping outgoing line 4 and the switch cabinet inlet and outlet bushing busbar constitute the main current diversion circuit to realize the main circuit load breaking, closing, isolating and separating functions.

[0064] The static end lapped outgoing line 4, the grounding switch vacuum interrupter 13, the lower outgoing line 5 and the switch cabinet grounding bushing busbar form a grounding loop for users to ground the switch load.

[0065] The filling hole 9, the insert 91, the pole base mounting hole 8 and the sealing ring mounting groove 1001 form a sealed chamber with the switch cabinet housing to achieve inflation in the chamber to improve the insulation level and reduce the insulation distance between the pole and the ground.

[0066] The term "consisting of" describing a combination shall include the identified elements, ingredients, parts or steps and other elements, ingredients, parts or steps that do not substantially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe a combination of elements, ingredients, parts or steps herein also contemplates embodiments that consist essentially of these elements, ingredients, parts or steps. By using the term "may", it is intended to illustrate that any of the attributes described that "may" be included are optional.

[0067] Multiple elements, ingredients, parts or steps can be provided by a single integrated element, ingredient, part or step. Alternatively, a single integrated element, ingredient, part or step can be divided into separate multiple elements, ingredients, parts or steps. The disclosure "one" or "an" used to describe an element, ingredient, part or step is not intended to exclude other elements, ingredients, parts or steps.

[0068] It should be understood that the above description is for illustration and not for limitation. Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but rather with reference to the foregoing claims and the full scope of equivalents to which such claims are entitled. For the purpose of comprehensiveness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended to be a waiver of such subject matter, nor should it be considered that the applicant has not considered such subject matter to be part of the disclosed inventive subject matter.

Claims

1. A sealed pole with load breaking and isolation grounding functions, characterized in that: It comprises a load switch vacuum interrupter (11), an isolating switch vacuum interrupter (12) and a grounding switch vacuum interrupter (13); The load switch vacuum interrupter (11) is provided with a load switch vacuum interrupter static conductive rod (111) and a load switch vacuum interrupter dynamic conductive rod (112), and the load switch vacuum interrupter static end conductive rod (111) is fixedly connected to the upper outlet line (2); The isolating switch vacuum interrupter (12) is provided with an isolating switch vacuum interrupter static conductive rod (121) and an isolating switch vacuum interrupter dynamic conductive rod (122), and the isolating switch vacuum interrupter dynamic conductive rod (122) and the load switch vacuum interrupter dynamic conductive rod (112) are both slidably connected to the dynamic end lap outlet line (3); The grounding switch vacuum interrupter (13) is provided with a grounding switch vacuum interrupter static conductive rod (131) and a grounding switch vacuum interrupter dynamic conductive rod (132); the grounding switch vacuum interrupter static conductive rod (131) and the static end lap outlet line (4) are fixedly connected, and the grounding switch vacuum interrupter dynamic conductive rod (132) and the lower outlet line (5) are slidably connected; The load switch vacuum interrupter (11), the isolating switch vacuum interrupter (12), the grounding switch vacuum interrupter (13), the upper outgoing wire (2), the moving end overlapping outgoing wire (3), the static end overlapping outgoing wire (4) and the lower outgoing wire (5) are all sealed in an epoxy resin housing (6) by an APG process using epoxy resin.

2. The sealed pole with load breaking and isolation grounding functions according to claim 1, characterized in that: The outer side of the upper outlet line (2) is sealed with epoxy resin to form an incoming line conductive cone (1002), the outer side of the end lap outlet line (4) is sealed with epoxy resin to form an outgoing line conductive cone (1003), and the outer side of the lower outlet line (5) is sealed with epoxy resin to form a grounding outlet conductive cone (1004).

3. The sealed pole with load breaking and isolation grounding functions according to claim 2, characterized in that: The static end lap outlet (4) is provided with three joints, the upper and lower end joints are respectively fastened to the isolating switch vacuum interrupter (12) and the grounding switch vacuum interrupter (13), and the middle joint is a pole main circuit outlet installation hole.

4. The sealed pole with load breaking and isolation grounding functions according to claim 1, characterized in that: The load switch vacuum interrupter (11), the disconnector vacuum interrupter (12), and the grounding switch vacuum interrupter (13) have the same parameters, and the load switch vacuum interrupter moving conductive rod (112), the disconnector vacuum interrupter moving conductive rod (122), and the grounding switch vacuum interrupter moving conductive rod (132) have the same movement stroke.

5. The sealed pole with load breaking and isolation grounding functions according to claim 1, characterized in that: The load switch vacuum interrupter movable conductive rod (112) is operated by a first insulating pull rod (71), the disconnector vacuum interrupter movable conductive rod (122) is operated by a second insulating pull rod (72), and the grounding switch vacuum interrupter movable conductive rod (132) is operated by a pull rod (73); the first insulating pull rod (71), the second insulating pull rod (72), and the chamber where the pull rod (73) is located are connected.

6. A sealed pole with load breaking and isolation grounding functions according to claim 1 or 5, characterized in that: The epoxy resin shell (6) is provided with an air filling hole (9).

7. The sealed pole with load breaking and isolation grounding functions according to claim 1, characterized in that: The surfaces of the load switch vacuum interrupter (11), the isolating switch vacuum interrupter (12) and the grounding switch vacuum interrupter (13) are all provided with a silicone rubber layer as an elastic buffer layer.

8. The sealed pole with load breaking and isolation grounding functions according to claim 7, characterized in that: The movable end lap outlet wire (3) and the lower outlet wire (5) are provided with protrusions, and the protrusions are inserted into the silicone rubber layer.

9. The sealed pole with load breaking and isolation grounding functions according to claim 8, characterized in that: The protrusion is a triangular protrusion.

10. The sealed pole with load breaking and isolation grounding functions according to claim 1, characterized in that: A sealing ring installation groove (1001) is provided on the base installation surface of the sealed pole.

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