CN112615294A - Pole-mounted combined electrical apparatus - Google Patents

Pole-mounted combined electrical apparatus Download PDF

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Publication number
CN112615294A
CN112615294A CN202011426715.5A CN202011426715A CN112615294A CN 112615294 A CN112615294 A CN 112615294A CN 202011426715 A CN202011426715 A CN 202011426715A CN 112615294 A CN112615294 A CN 112615294A
Authority
CN
China
Prior art keywords
isolating switch
cavity
conductor
contact
box body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011426715.5A
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Chinese (zh)
Inventor
王承玉
冯英
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Electric Power Research Institute Co Ltd CEPRI
Original Assignee
China Electric Power Research Institute Co Ltd CEPRI
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Electric Power Research Institute Co Ltd CEPRI filed Critical China Electric Power Research Institute Co Ltd CEPRI
Priority to CN202011426715.5A priority Critical patent/CN112615294A/en
Priority to PCT/CN2020/135558 priority patent/WO2022120775A1/en
Publication of CN112615294A publication Critical patent/CN112615294A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B5/00—Non-enclosed substations; Substations with enclosed and non-enclosed equipment
    • H02B5/02—Non-enclosed substations; Substations with enclosed and non-enclosed equipment mounted on pole, e.g. pole transformer substation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/26—Casings; Parts thereof or accessories therefor
    • H02B1/46—Boxes; Parts thereof or accessories therefor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/0354—Gas-insulated switchgear comprising a vacuum switch
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices

Abstract

The invention provides a pole-mounted combined electrical apparatus, comprising: the circuit breaker comprises a box body, two groups of sleeves, an insulating body, an isolating switch and a circuit breaker; partial structures of the two groups of sleeves are respectively inserted at two sides of the box body, a first measuring circuit penetrates through one group of sleeves, and a second measuring circuit penetrates through the other group of sleeves; the insulation body is arranged in the box body and divides the interior of the box body into a first cavity, a second cavity, a third cavity and a fourth cavity, a first conductor is arranged in the first cavity, and the first conductor is in butt joint with the first measuring circuit; the fixed contact of the isolating switch is positioned in the first cavity and is contacted with the first conductor, the moving contact of the isolating switch is positioned in the fourth cavity, and the conducting rod of the isolating switch is exposed in the area between the first cavity and the fourth cavity; a circuit breaker is disposed in the third chamber and is connected to the second measurement line by a second conductor. The invention has compact structure, the fracture of the isolating switch is an obvious disconnection point, and the insulation is reliable; and the insulation level between the fractures of the isolating switch is stable.

Description

Pole-mounted combined electrical apparatus
Technical Field
The invention relates to the technical field of electric power engineering, in particular to a pole-mounted combined electrical apparatus.
Background
In the prior art, a load switch on a column, a circuit breaker on the column, a disconnecting switch on the column and the like are generally independentIn the existing on-pole load switch and circuit breaker, a vacuum arc-extinguishing chamber is mostly adopted as an arc-extinguishing and isolating fracture, so that the vacuum arc-extinguishing chamber has the possibility of air leakage and cannot be used as a safe isolating fracture, and the risk and trouble are brought to maintenance; or by using SF6The gas plays the role of insulation and arc extinction, and does not meet the requirement of environmental protection. In practical application, parts which need to be touched by a maintainer need to be isolated from the electrified part of other non-overhauling sections through an isolation fracture, and the overhauling parts are grounded. For the vacuum switch equipment on the column, the isolation is usually realized by additionally installing an isolating switch on a circuit, and the grounding of the maintenance component is completed by manually lapping a grounding wire. The isolating switch installed additionally enables the vacuum switch on the column to be installed on one column, and the isolating switch is installed to enable arrangement and wiring to be complicated, linkage of the vacuum switch on the column and the isolating switch cannot be achieved, and live-line maintenance of narrow space on the column is not facilitated. It can be seen that the external integration of the existing pole-mounted combined electrical apparatus, the environmental adaptability of the isolating switch is poor, and the integration level of the isolating switch and equipment such as a mutual inductor and a lightning arrester is not high, so that the use requirement of distribution distributed automation can not be met.
Disclosure of Invention
In view of the above, the invention provides a pole-mounted combined electrical apparatus, and aims to solve the problems that an isolation switch cannot be integrated inside the existing pole-mounted combined electrical apparatus, the insulation level of a fracture is difficult to guarantee, and the butt joint error between an external measuring circuit and an internal conductor is large.
The invention provides a pole-mounted combined electrical apparatus, which comprises:
a box body;
the two groups of sleeves are partially inserted into two sides of the box body respectively, a first measuring circuit penetrates through one group of sleeves, and a second measuring circuit penetrates through the other group of sleeves;
the insulation body is arranged in the box body and divides the inner part of the box body into a first cavity, a second cavity, a third cavity and a fourth cavity, a first conductor is arranged in the first cavity, and the first conductor is in butt joint with the first measuring circuit; a second conductor is arranged in the second cavity and is butted with the second measuring line;
the isolating switch is arranged in the box body, the fixed contact of the isolating switch is positioned in the first cavity and is in contact with the first conductor, the moving contact of the isolating switch is positioned in the fourth cavity, and the conducting rod of the isolating switch is exposed in the area between the first cavity and the fourth cavity;
and the circuit breaker is arranged in the third chamber, is connected with the second measuring circuit through the second conductor and is used for switching the normal current of the circuit or cutting off the fault current.
Further, in the above pole-mounted combination electrical apparatus, the disconnecting switch includes: the isolating switch comprises an isolating switch operating shaft, an isolating switch insulating pull rod, an isolating switch conducting rod, an isolating switch static contact and an isolating switch moving contact; wherein the content of the first and second substances,
one end of the isolating switch insulating pull rod is connected with the isolating switch operating shaft, the other end of the isolating switch insulating pull rod is connected with the isolating switch conducting rod, and the isolating switch operating shaft drives the isolating switch conducting rod to move between the isolating switch static contact and the isolating switch moving contact by driving the isolating switch insulating pull rod to achieve the conduction and the disconnection of the isolating switch static contact and the isolating switch moving contact.
Furthermore, in the column-mounted combined electrical apparatus, a guide block is embedded in one end of the isolating switch conducting rod close to the isolating switch fixed contact, a plurality of first guide rings are arranged at one end of the isolating switch conducting rod close to the isolating switch moving contact, the first guide rings are distributed on two sides of the isolating switch moving contact, and the guide block is matched with the first guide rings to enable the isolating switch fixed contact and the isolating switch moving contact to be inserted on the isolating switch conducting rod in a centering manner.
Furthermore, in the column-mounted combined electrical apparatus, the guide block is circumferentially provided with a plurality of vent holes to prevent the insulating gas in the box body from being sealed.
Further, in the above pole-mounted switchgear, the circuit breaker includes: the circuit breaker comprises a circuit breaker operating shaft, a circuit breaker insulating pull rod and a vacuum arc-extinguishing chamber; wherein the content of the first and second substances,
one end of the circuit breaker insulating pull rod is connected with the movable end of the vacuum arc extinguish chamber, and a spring inside the circuit breaker insulating pull rod is arranged close to the vacuum arc extinguish chamber; the other end of the breaker insulation pull rod is connected with the breaker operating shaft, and the breaker insulation pull rod is used for transmitting the switching-on and switching-off energy of the breaker operating shaft to the vacuum arc-extinguishing chamber so as to control the switching-on and switching-off operation of the breaker; and the movable end of the vacuum arc extinguish chamber is connected with the second measuring circuit, and the first measuring circuit which is conducted through the static contact of the isolating switch and the moving contact of the isolating switch is led out of the box body through the vacuum arc extinguish chamber.
Further, in the above column-mounted combined electrical apparatus, the two sets of sleeves are provided with a guide mechanism for guiding the butt joint of the first measurement line and the first conductor and the butt joint of the second measurement line and the second conductor.
Further, in the above column-mounted combined electrical apparatus, the guide mechanism includes: the conductive tube, the guide sleeve, the second guide ring and the watchband contact finger structure; wherein the content of the first and second substances,
a first plug cavity and a second plug cavity are respectively arranged at two opposite ends of the conductive tube, and the first measuring line is plugged in the first plug cavity; the first conductor is inserted into the second insertion cavity, and a guide sleeve is sleeved between the first end of the first conductor and the inner wall of the conductive pipe;
the second guide ring is sleeved on the first conductor at a position far away from the first end, the area, which is positioned on the first conductor, between the second guide ring and the guide sleeve is slidably sleeved with the watchband contact finger structure, and the guide sleeve, the second guide ring and the watchband contact finger structure are matched to ensure the reliable butt joint of the conductive tube and the first conductor.
Further, in the above post-assembled electrical apparatus, the watchband contact finger structure is formed by stacking a plurality of watchband contact fingers, and a spring is disposed between each watchband contact finger to limit displacement of each watchband contact finger on the first conductor.
Furthermore, in the pole-mounted combined electrical apparatus, the lightning arrester and the voltage transformer are arranged in parallel on one side of the two groups of sleeves positioned outside the box body.
Further, in the column-mounted combined electrical apparatus, the inner wall of the box body is provided with a flame-retardant structure.
According to the invention, the isolating switch and the circuit breaker are integrated in the insulating body of the integral frame structure, the structure is compact, the number of wiring terminals is reduced, and the wiring of the whole electric appliance is simpler; and the reduction of the insulation level between the fractures of the isolating switch caused by the change of the state of the internal insulating gas, the pollution on the surface of the insulating body, the deposition of metal debris generated by the operation of the isolating switch 4 on the surface of the insulating body and the like can be avoided.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is an external structural schematic diagram of a pole-mounted combined electrical apparatus provided in an embodiment of the present invention;
fig. 2 is a schematic diagram of an internal structure of the pole-mounted combined electrical apparatus provided in the embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1 and 2, the pole-mounted composite apparatus according to the embodiment of the present invention includes: the device comprises a box body 1, two groups of sleeves 2, an insulating body 3, an isolating switch 4 and a breaker 5; partial structures of two groups of sleeves 2 are respectively inserted into two sides of the box body 1, a first measuring line 6 penetrates through one group of sleeves 2, and a second measuring line 7 penetrates through the other group of sleeves 2; the insulation body 3 is arranged in the box body 1, the interior of the box body 1 is divided into a first chamber, a second chamber, a third chamber and a fourth chamber, a first conductor 8 is arranged in the first chamber, and the first conductor 8 is in butt joint with the first measuring circuit 6; a second conductor 9 is arranged in the second cavity, and the second conductor 9 is butted with the second measuring line 7; the isolating switch 4 is arranged in the box body 1, a fixed contact of the isolating switch 4 is positioned in the first cavity and is contacted with the first conductor 8, a movable contact of the isolating switch 4 is positioned in the fourth cavity, and a conducting rod of the isolating switch 4 is exposed in an area between the first cavity and the fourth cavity; the circuit breaker 5 is arranged in the third chamber, is connected with the second measuring line 7 through the second conductor 9, and is used for switching normal current in the line or cutting off fault current.
Specifically, the case 1 may be made of metal, and the case 1 has a stepped layered structure. The tank 1 may be filled with an insulating gas, for example, a non-greenhouse gas such as dry air, or SF6A gas.
The lightning arrester 23 and the voltage transformer 24 are arranged on one side of the two groups of sleeves 2 outside the box body 1 in parallel, and a three-phase independent structure or a three-phase integrated structure is shown in the figure. The lightning arrester can effectively protect the first measuring line 6 and the second measuring line 7. The voltage transformer can be an electronic voltage sensor or an electromagnetic voltage transformer; electric energy signals are collected through an electronic voltage sensor, and the electric energy signals are transmitted to an energy storage element in an FTU (power distribution switch monitoring terminal) through a first measuring line 6 and a second measuring line 7, so that the breaker can be driven to act (power failure) under the condition of power failure. The energy storage element can be an energy storage capacitor or a storage battery.
The inner wall of the box body 1 is provided with a flame-retardant structure. The flame-retardant structure can be a flame-retardant layer formed by coating a flame-retardant material; it may also be a fire retardant panel made of a fire retardant material. The flame-retardant structure is arranged on the inner surface of the box body 1, so that the arc resistance of the whole switch device is greatly improved.
The sleeve 2 may include: the voltage transformer is directly contacted with the outer surface of the first measuring line 6 or the second measuring line 7 or is isolated from the first measuring line 6 or the second measuring line 7 through an insulating material, and the first measuring line 6, the second measuring line 7, the insulating sleeve and the voltage transformer are coated and solidified into a whole through the insulating material. And voltage sensors are arranged in the two groups of sleeves 2, and voltage data passing through the first measuring line 6 and the second measuring line 7 can be respectively acquired in real time.
And shielding covers 21 are arranged at the parts, butted with the first conductor 8, of the two groups of sleeves 2, of the first measuring line 6, and are used for shielding electric fields.
The insulating body 3 is a frame structure made of a solid insulating material, which may be made of an epoxy resin material, for example. And current transformers 31 are arranged on the inlet and outlet lines of the insulating body 3. The insulation body 3 divides the interior of the box body 1 into four chambers, a first conductor 8 is laid in the first chamber, and one end, close to the bottom of the box body 1, of the first conductor 8 is connected with a fixed contact of the isolating switch 4; the second chamber is arranged opposite to the second measuring line 7 so as to penetrate through the second conductor 9. A circuit breaker 5 is laid in the third chamber. Wherein the fourth chamber is communicated with the third chamber.
The fixed contact of the isolating switch 4 is in contact with the first conductor 8, so that the first measuring line 6 is led out of the box body 1 through the circuit breaker 5. The conducting rod of the isolating switch 4 is exposed in the area between the first cavity and the fourth cavity, so that a fracture of the isolating switch 4 is an obvious disconnection point, and the insulation level of the fracture of the isolating switch 4 is greater than that of the first measuring circuit 6 to the ground, so as to ensure the insulation reliability of the fracture; and the reduction of the insulation level between the fractures of the isolating switch 4 can not be caused by the change of the state of the internal insulating gas, the pollution on the surface of the insulating body 3, the deposition of metal debris generated by the operation of the isolating switch 4 on the surface of the insulating body 3 and the like.
As is obvious from the above description, the isolating switch 4 and the circuit breaker 5 are integrated in the insulating body 3 of the integral frame structure, so that the structure is compact, the number of the connecting terminals is reduced, and the wiring of the whole electric appliance is simpler; and the reduction of the insulation level between the fractures of the isolating switch 4 can not be caused by the change of the state of the internal insulating gas, the pollution on the surface of the insulating body 3, the deposition of metal debris generated by the operation of the isolating switch 4 on the surface of the insulating body 3 and the like.
With continued reference to fig. 2, the disconnector 4 comprises: an isolating switch operating shaft 41, an isolating switch insulating pull rod 42, an isolating switch conducting rod 43, an isolating switch static contact 44 and an isolating switch moving contact 45; one end of the isolating switch insulating pull rod 42 is connected to the isolating switch operating shaft 41, and the other end of the isolating switch insulating pull rod is connected to the isolating switch conducting rod 43, and the isolating switch operating shaft 41 drives the isolating switch conducting rod 43 to move between the isolating switch fixed contact 44 and the isolating switch moving contact 45 by driving the isolating switch insulating pull rod 42 to realize the conduction and the disconnection of the isolating switch fixed contact 44 and the isolating switch moving contact 45.
Specifically, according to the requirements of the spring current-carrying capacity and the dynamic thermal stability test, the fixed contact 44 of the isolating switch and the movable contact 45 of the isolating switch are both composed of a plurality of spring coils arranged at intervals. For example, two spring coils arranged at intervals are selected, which is beneficial to increasing the through-current capacity. The isolating conducting rod is preferably a copper pipe, so that current passes through the outer layer, materials are saved, weight is reduced, and driving is facilitated.
In order to ensure the length of the fracture of the isolating switch, one end of the first cavity, which is close to the bottom of the box body 1, is bent and extended outward from the length direction of the conducting rod 43 of the isolating switch.
The junction of the isolating switch insulating operating rod and the isolating switch conducting rod 43 is a conical surface, and the larger side of the caliber of the conical surface is close to the isolating switch conducting rod 43. Compared with the insulating operating rod in the prior art, the insulating operating rod for the disconnecting switch has the advantages that the number of the umbrella skirts is reduced, the processing is more convenient, the materials are saved, and the insulating property in the horizontal direction is better.
The isolating switch operating shaft 41 is provided with a buffering spring structure (shown in the figure), and the isolating switch can be automatically switched on after being operated at a certain angle, so that the operating force is reduced, and the isolating switch is convenient for field personnel to operate.
In actual operation, an operator applies an external force to the external operating shaft of the box body 1 to drive the isolating switch operating shaft to rotate, the rotating motion of the isolating switch operating shaft drives one end of the isolating switch insulating pull rod 42 to make a curve motion, and the other end of the isolating switch insulating pull rod 42 drives the isolating switch moving contact 45 to make a linear motion, so that the opening and closing of the isolating switch static contact 44 and the isolating switch moving contact 45 are realized.
Further, a guide block 452 is embedded in one end of the disconnecting switch conducting rod 43 close to the disconnecting switch fixed contact 44, a plurality of first guide rings 451 are arranged at one end of the disconnecting switch conducting rod 43 close to the disconnecting switch moving contact 45, each first guide ring 451 is distributed on two sides of the disconnecting switch moving contact 45, and the guide block 452 is matched with the first guide rings 451 to enable the disconnecting switch fixed contact 44 and the disconnecting switch moving contact 45 to be inserted in the disconnecting switch conducting rod 43 in a centering manner.
Specifically, one end of the isolating switch conducting rod 43 is connected with the first conductor 8 through a bolt, and the guide block is sleeved between the inner wall of the isolating switch conducting rod 43 and the head of the bolt; the other end of the isolating switch conducting rod 43 is connected with the isolating switch insulating pull rod 42 through a bolt, and two second guide rings 223 are sleeved outside the isolating switch conducting rod 43, so that the isolating switch static contact 44 and the isolating switch moving contact 45 are coaxially arranged.
Preferably, a plurality of vent holes (not shown in the figure) are formed in the circumferential direction of the guide block, and the vent holes are communicated with a small space in the static contact 44 of the isolating switch, so as to prevent the insulating gas in the static contact 44 of the isolating switch from being sealed.
With continued reference to fig. 2, the circuit breaker 5 includes: a circuit breaker operating shaft 51, a circuit breaker insulating rod 52 and a vacuum arc-extinguishing chamber 53; one end of the breaker insulating pull rod 52 is connected with the movable end of the vacuum arc-extinguishing chamber 53, and the spring 521 inside the breaker insulating pull rod 52 is arranged close to the vacuum arc-extinguishing chamber 53; the other end of the breaker insulating pull rod 52 is connected with the breaker operating shaft 51, and the breaker insulating pull rod 52 is used for transmitting the switching-on and switching-off energy of the breaker operating shaft 51 to the vacuum arc-extinguishing chamber 53 so as to control the switching-on and switching-off operation of the breaker; the movable end of the vacuum arc-extinguishing chamber 53 is connected with the second measuring circuit 7, and the first measuring circuit 6 conducted through the static contact 44 of the isolating switch and the movable contact 45 of the isolating switch is led out of the box body 1 through the vacuum arc-extinguishing chamber 53.
Specifically, the disconnecting switch moving contact 45 is connected to the vacuum interrupter 53 through the connecting conductor 11. The spring in the insulating pull rod 52 of the circuit breaker is close to one side of the arc extinguish chamber, so that the driving quality is small, and the output characteristic is good.
The end of the circuit breaker insulating pull rod 52 connected with the moving end of the vacuum arc-extinguishing chamber 53 is also provided with a flexible connection, and the flexible connection is connected with the second conductor 9 through a bolt. The flexible connection is controlled by the insulating pull rod 52 of the circuit breaker to realize that the circuit breaker is kept electrically connected with the second conductor 9 when the circuit breaker is opened and closed.
The circuit breaker operation shaft 51 is sealed in the casing of the side wall of the box body 1, is not influenced by the external environment, has strong environmental adaptability, and can realize maintenance-free during the mechanical life through the mechanism design.
In the above embodiments, the two sets of sleeves 2 are provided with the guiding mechanism 22 for guiding the butt joint of the first measuring line 6 and the first conductor 8, and the butt joint of the second measuring line 7 and the second conductor 9.
Specifically, the guide mechanism 22 includes: a conductive tube 221, a guide sleeve 222, a second guide ring 223 and a band finger structure 224; the two opposite ends of the conductive tube are respectively provided with a first plug cavity and a second plug cavity, and the first measuring line 6 is plugged in the first plug cavity; the first conductor 8 is inserted into the second insertion cavity, and a guide sleeve is sleeved between the first end of the first conductor 8 and the inner wall of the conductive pipe; the guide ring is sleeved on the first conductor 8 at a position far away from the first end, the first conductor 8 is provided with a watchband contact finger structure, the second guide ring 223 and the watchband contact finger structure are slidably sleeved on an area between the second guide ring 223 and the guide ring, the second guide ring 223 and the watchband contact finger structure are matched with each other to ensure the reliable butt joint of the conductive tube and the first conductor 8. Wherein:
the first inserting cavity and the second inserting cavity can be both of groove structures. The first measuring line 6 is fixed to the first plug cavity by means of screws. The first end of the first conductor 8 is provided with a boss, and the guide sleeve is sleeved between the boss and the inner wall of the conductive pipe through a bolt. The first conductor 8 is provided with an annular groove matched with the second guide ring 223, and the guide ring is arranged to prevent friction between the conductive tube and the first conductor 8.
Watchband touches and indicates structure slidable cover to establish the region that lies in between guide ring and the uide bushing on first conductor 8, and the watchband touches the setting of indicating the structure, can reduce contact resistance, has increased the current capacity, and plug many times, has guaranteed contact tube and first conductor 8, the accurate butt joint of contact tube and second conductor 9.
Further, the watchband contact finger structure is formed by stacking a plurality of watchband contact fingers, and a spring 225 is arranged between each watchband contact finger to limit the displacement of each watchband contact finger on the first conductor 8. The watchband contact finger positioned on the uppermost layer is contacted with the bottom of the boss, and the watchband contact finger positioned on the lowermost layer is contacted with the part, close to the first guide ring, on the first conductor 8.
Referring to fig. 2, the working process of the combined electrical apparatus on the column in this embodiment is as follows: an external measuring circuit enters the box body 1 through one group of sleeves 2, is connected with the fixed contacts 44 of the disconnecting switches, enables the two fixed contacts 44 of the disconnecting switches to be contacted with the moving contacts 45 of the disconnecting switches through the conducting rods 43 of the disconnecting switches, the moving contacts 45 of the disconnecting switches to be connected with the static end of the vacuum arc-extinguishing chamber 53, and the external measuring circuit is led out of the box body 1 through the vacuum arc-extinguishing chamber 53 and the right sleeve. When the whole electric appliance needs to be switched off, the vacuum arc-extinguishing chamber 53 is driven to be switched off through the breaker insulation pull rod 52, so that electric arcs are extinguished in the vacuum arc-extinguishing chamber 53, and a circuit is broken; and then the isolating switch conducting rod 43 is driven to open through the isolating switch insulating pull rod 42, so that the static contact of the isolating switch 4 is electrically separated from the isolating switch moving contact 45. When the whole electric appliance needs to be switched on, the isolating switch operating shaft 41 drives the isolating switch conducting rod 43 to be switched on through the isolating switch insulating pull rod 42, so that the isolating switch static contact 44 and the isolating switch moving contact 45 are switched on; the circuit breaker operation shaft 51 drives the vacuum arc-extinguishing chamber 53 to close through the circuit breaker insulation pull rod 52, so that the circuit is closed.
As can be clearly seen from the above description, in the pole-mounted combined electrical apparatus provided in this embodiment, the disconnecting switch and the circuit breaker are integrated in the insulating body of the integral frame structure, so that the structure is compact, the number of the connecting terminals is reduced, and the wiring of the whole electrical apparatus becomes simpler; the reduction of the insulation level between the fractures of the isolating switch caused by the change of the state of the internal insulating gas, the pollution on the surface of the insulating body, the deposition of metal debris generated by the operation of the isolating switch on the surface of the insulating body and the like can be avoided; furthermore, through arranging the guide mechanisms in the two groups of sleeves, the current capacity is increased while the butt joint of the accurate measuring circuit and the inner conductor is ensured.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. A pole top combination electrical appliance, comprising:
a box body;
the two groups of sleeves are partially inserted into two sides of the box body respectively, a first measuring circuit penetrates through one group of sleeves, and a second measuring circuit penetrates through the other group of sleeves;
the insulation body is arranged in the box body and divides the inner part of the box body into a first cavity, a second cavity, a third cavity and a fourth cavity, a first conductor is arranged in the first cavity, and the first conductor is in butt joint with the first measuring circuit; a second conductor is arranged in the second cavity and is butted with the second measuring line;
the isolating switch is arranged in the box body, the fixed contact of the isolating switch is positioned in the first cavity and is in contact with the first conductor, the moving contact of the isolating switch is positioned in the fourth cavity, and the conducting rod of the isolating switch is exposed in the area between the first cavity and the fourth cavity;
and the circuit breaker is arranged in the third chamber, is connected with the second measuring circuit through the second conductor and is used for switching the normal current of the circuit or cutting off the fault current.
2. The pole top combiner of claim 1, wherein the isolation switch comprises: the isolating switch comprises an isolating switch operating shaft, an isolating switch insulating pull rod, an isolating switch conducting rod, an isolating switch static contact and an isolating switch moving contact; wherein the content of the first and second substances,
one end of the isolating switch insulating pull rod is connected with the isolating switch operating shaft, the other end of the isolating switch insulating pull rod is connected with the isolating switch conducting rod, and the isolating switch operating shaft drives the isolating switch conducting rod to move between the isolating switch static contact and the isolating switch moving contact by driving the isolating switch insulating pull rod to achieve the conduction and the disconnection of the isolating switch static contact and the isolating switch moving contact.
3. The pole-mounted combined electrical apparatus of claim 2, wherein a guide block is embedded in one end of the isolating switch conducting rod close to the isolating switch fixed contact, a plurality of first guide rings are arranged on one end of the isolating switch conducting rod close to the isolating switch movable contact, the first guide rings are distributed on two sides of the isolating switch movable contact, and the guide block is matched with the first guide rings to enable the isolating switch fixed contact and the isolating switch movable contact to be inserted on the isolating switch conducting rod in a centering manner.
4. The pole-mounted combined electrical apparatus of claim 3, wherein the guide block is provided with a plurality of vent holes along the circumference thereof to prevent the insulation gas in the box body from being sealed.
5. The pole top combiner of claim 1, wherein the circuit breaker comprises: the circuit breaker comprises a circuit breaker operating shaft, a circuit breaker insulating pull rod and a vacuum arc-extinguishing chamber; wherein the content of the first and second substances,
one end of the circuit breaker insulating pull rod is connected with the movable end of the vacuum arc extinguish chamber, and a spring inside the circuit breaker insulating pull rod is arranged close to the vacuum arc extinguish chamber; the other end of the breaker insulation pull rod is connected with the breaker operating shaft, and the breaker insulation pull rod is used for transmitting the switching-on and switching-off energy of the breaker operating shaft to the vacuum arc-extinguishing chamber so as to control the switching-on and switching-off operation of the breaker; and the movable end of the vacuum arc extinguish chamber is connected with the second measuring circuit, and the first measuring circuit which is conducted through the static contact of the isolating switch and the moving contact of the isolating switch is led out of the box body through the vacuum arc extinguish chamber.
6. The pole assembly of claim 1 wherein a guide mechanism is provided in each of the two sleeves for guiding the docking of the first measurement line with the first conductor and the docking of the second measurement line with the second conductor.
7. The pole top assembly of claim 4 wherein the guide mechanism comprises: the conductive tube, the guide sleeve, the second guide ring and the watchband contact finger structure; wherein the content of the first and second substances,
a first plug cavity and a second plug cavity are respectively arranged at two opposite ends of the conductive tube, and the first measuring line is plugged in the first plug cavity; the first conductor is inserted into the second insertion cavity, and a guide sleeve is sleeved between the first end of the first conductor and the inner wall of the conductive pipe;
the second guide ring is sleeved on the first conductor at a position far away from the first end, the area, which is positioned on the first conductor, between the second guide ring and the guide sleeve is slidably sleeved with the watchband contact finger structure, and the guide sleeve, the second guide ring and the watchband contact finger structure are matched to ensure the reliable butt joint of the conductive tube and the first conductor.
8. The pole-mounted combination of claim 7, wherein the strap finger structure is formed by stacking a plurality of strap fingers, and a spring is disposed between each strap finger to limit displacement of each strap finger on the first conductor.
9. The pole-mounted combined electrical apparatus of claim 1, wherein the lightning arrester and the voltage transformer are connected in parallel on one side of the two sets of bushings outside the box body.
10. The pole-mounted combined electrical apparatus of claim 1, wherein the inner wall of the box body is provided with a flame-retardant structure.
CN202011426715.5A 2020-12-09 2020-12-09 Pole-mounted combined electrical apparatus Pending CN112615294A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202011426715.5A CN112615294A (en) 2020-12-09 2020-12-09 Pole-mounted combined electrical apparatus
PCT/CN2020/135558 WO2022120775A1 (en) 2020-12-09 2020-12-11 Pole-mounted combined electrical appliance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011426715.5A CN112615294A (en) 2020-12-09 2020-12-09 Pole-mounted combined electrical apparatus

Publications (1)

Publication Number Publication Date
CN112615294A true CN112615294A (en) 2021-04-06

Family

ID=75229686

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011426715.5A Pending CN112615294A (en) 2020-12-09 2020-12-09 Pole-mounted combined electrical apparatus

Country Status (1)

Country Link
CN (1) CN112615294A (en)

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