CN110853952A - Pole-mounted switch with built-in isolating switch - Google Patents
Pole-mounted switch with built-in isolating switch Download PDFInfo
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- CN110853952A CN110853952A CN201911213306.4A CN201911213306A CN110853952A CN 110853952 A CN110853952 A CN 110853952A CN 201911213306 A CN201911213306 A CN 201911213306A CN 110853952 A CN110853952 A CN 110853952A
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- Prior art keywords
- circuit breaker
- isolation
- switch
- curve
- main shaft
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/46—Interlocking mechanisms
- H01H33/52—Interlocking mechanisms for interlocking two or more switches
Abstract
The invention discloses a pole-mounted switch with a built-in isolating switch.A breaker and the isolating switch are arranged in a shell, and an isolating operation mechanism and a breaker operation mechanism are arranged at corresponding positions at the front part of the shell; the main shaft of the isolating switch is connected with the isolating operation mechanism; the transmission part of the circuit breaker is connected with the circuit breaker operating mechanism; the upper part of the interlocking plate is hinged with a breaker mechanism main shaft of a breaker operating mechanism through a crank arm; the lower part of the interlocking plate is limited and arranged in a limiting sliding chute of the isolation operating mechanism, and the interlocking plate can move in the direction along the limiting sliding chute under the rotation of a main shaft of a breaker mechanism of the breaker operating mechanism; the isolation mechanism main shaft is fixedly connected with an isolation boss, and the lower part of the interlocking plate is correspondingly provided with a bulge matched with the isolation boss; when the circuit breaker is in a closing state, the protrusion at the lower end of the interlocking plate is in contact with the isolation boss, the rotation of the main shaft of the isolation mechanism is limited, the isolation operation mechanism is in a locking state, and the isolation switch cannot be rotated.
Description
Technical Field
The invention belongs to the technical field of outdoor overhead distribution lines, and particularly relates to a pole-mounted switch with a built-in isolating switch.
Background
The vacuum circuit breakers widely applied at present are ZW20 type and ZW32 type switches, and are provided with external isolating switches. The external isolating switch in the outdoor environment is easy to have the phenomena of material corrosion, poor contact and improper opening and closing operation, and generates serious potential safety hazard on electric power operation.
In order to make up for the defect, the isolation disconnecting link is placed in the breaker box body, and the stable relative environment is favorable for smooth action of the switch. However, the existing schemes have the defects of overlarge volume, low assembly consistency, large solid sealing amount, difficult subsequent pollution degradation and the like.
Disclosure of Invention
The purpose is as follows: in order to overcome the defects in the prior art, the invention provides a pole-mounted switch with a built-in isolating switch.
The technical scheme is as follows: in order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a pole-mounted switch with a built-in isolating switch comprises a shell, a circuit breaker, the isolating switch, a circuit breaker operating mechanism, an isolating operating mechanism and an interlocking plate;
a circuit breaker and a disconnecting switch are arranged in the shell and are arranged up and down to form an upper circuit breaker and a lower disconnecting structure; an isolation operating mechanism and a circuit breaker operating mechanism are arranged at corresponding positions on the front part of the shell;
the isolation main shaft of the isolation switch is connected with the isolation mechanism main shaft of the isolation operation mechanism, and the isolation switch is switched on and off by operating the isolation operation mechanism;
the transmission part of the circuit breaker is connected with a main shaft of a circuit breaker mechanism of a circuit breaker operating mechanism, and the circuit breaker operating mechanism is operated to realize the on-off of a vacuum arc extinguish chamber in the circuit breaker, namely the on-off of the circuit breaker; the transmission part comprises a transmission main shaft;
the upper part of the interlocking plate is hinged with a breaker mechanism main shaft of a breaker operating mechanism through a crank arm; the lower part of the interlocking plate is limited and arranged in a limiting sliding chute of the isolation operating mechanism, and the interlocking plate can move in the direction along the limiting sliding chute under the rotation of a main shaft of a breaker mechanism of the breaker operating mechanism;
in the isolation operation mechanism, an isolation boss is fixedly connected with a main shaft of the isolation mechanism, and a bulge matched with the isolation boss is correspondingly arranged at the lower part of the interlocking plate;
when the circuit breaker is in a closing state, the protrusion at the lower end of the interlocking plate is in contact with the isolation boss, the rotation of the main shaft of the isolation mechanism is limited, the isolation operation mechanism is in a locking state, and the isolation switch cannot be rotated.
In some embodiments, the isolating switch comprises an isolating main shaft, a movable knife board, an isolating pressure spring, a fixed connecting copper bar, an insulating fixed seat, a bracket and a static contact electrically connected with an isolating lap joint copper bar of the circuit breaker;
two ends of the insulating fixed seat are respectively installed and fixed in the shell through a bracket, and the fixed connecting copper bar is fixed in the insulating fixed seat;
the two ends of the isolation main shaft are rotatably arranged on the bracket, the movable knife board is fixedly arranged in the isolation main shaft, and the lower end of the movable knife board is movably connected to the fixedly connected copper bar;
the movable knife board is provided with an isolation pressure spring at the joint of the isolation main shaft and the fixed connection copper bar; the isolation main shaft is connected with the isolation operating mechanism through a connecting piece;
under the active action force of the isolation operating mechanism, the isolation main shaft rotates to drive the movable knife board to rotate, so that the upper end of the movable knife board is disconnected or connected with the fixed contact, and the disconnecting and closing of the isolation switch are realized.
In some embodiments, the circuit breaker comprises a transmission main shaft, a switching-on/off sliding groove plate, a vacuum arc extinguish chamber, a static end lapping copper bar, a flexible connection, an isolation lapping copper bar and a circuit breaker pressure spring;
the transmission main shaft is fixedly connected with a switching-on/off sliding groove plate,
the outer end of a static conducting rod of the vacuum arc extinguish chamber is fixedly connected with a static end lap copper bar; the outer end of a movable conducting rod of the vacuum arc extinguish chamber is connected with the isolation lap copper bar through flexible connection; the flexible connection is provided with a circuit breaker pressure spring, the connection end of the circuit breaker pressure spring is provided with a roller, and the roller is slidably connected and installed in the arc-shaped sliding groove of the opening and closing sliding groove plate;
under the main action force of the circuit breaker operating mechanism, the transmission main shaft drives the opening and closing sliding groove plates to rotate, and rollers of the pressure spring of the circuit breaker slide relatively in arc-shaped sliding grooves of the opening and closing sliding groove plates, so that opening and closing of the circuit breaker are realized.
Further, in some embodiments, the circuit breaker further includes a fixing seat, the fixing seat is fixedly installed on the insulating frame, and the fixing seat is provided with an installation hole for penetrating the transmission main shaft and a limiting groove matched with an end of a pressure spring of the circuit breaker; the transmission main shaft penetrates through the mounting hole of the fixing seat, the end part of the pressure spring of the circuit breaker is slidably mounted in the limiting groove, and the end part of the pressure spring of the circuit breaker can move in a telescopic manner along the direction of the limiting groove;
and the lower end platform of the fixing seat is provided with a threaded hole for connecting, installing and isolating the lap copper bar and the fixed contact.
Further, in some embodiments, the fixing base is made of duralumin 112, and is formed by three-dimensional numerical control machining or injection molding; and the lower end of the fixed seat is provided with a circular ring notch for providing a movement space for flexible connection in the switching-on and switching-off process.
Further, in some embodiments, the circuit breaker further comprises a mounting plate, the transmission main shaft is movably mounted in the mounting plate, and the vacuum arc-extinguishing chamber is mounted on the mounting plate through an insulating frame.
Further, in some embodiments, the arc-shaped sliding groove of the opening and closing sliding groove plate is formed by connecting a plurality of sections of arcs; sequentially comprises a curve 1, a curve 2, a curve 3 and a curve 4;
the curve 4 is a circular arc with the circle center at the rotating center of the opening and closing sliding groove plate, the overtravel of the roller is unchanged at any position on the curve 4, and the breaker is at the switching-on position; the angle of curve 4 is greater than 10 degrees;
when the opening and closing sliding groove plate rotates by 90 degrees, the position where the roller stays is on a curve 1, the circuit breaker is at a switching-off position, the curve 1 is a circular arc with the circle center at the rotating center of the opening and closing sliding groove plate, the opening distance of the roller is unchanged at any position on the curve 1, the angle of the curve 1 is larger than 10 degrees, the radius of the curve 4 minus the radius of the curve 1 is equal to the over travel plus the opening distance, the curve 2 and the curve 3 are transition curves, the curve 2 is tangent to the curve 1, the curve 3 is tangent to the curve 4, the slope of the process from the curve 3 to the curve 2 is gradually reduced, the moving process is smooth and has no convex points, and the roller is in place after the opening and closing process so.
In some embodiments, the pole-mounted switch with the built-in isolating switch further comprises an explosion-proof assembly, a pressure relief channel is arranged on the rear wall of the shell, and the explosion-proof assembly covers the pressure relief channel.
In some embodiments, the pole-mounted switch with the built-in isolating switch, the fixed end lapping copper bar of the circuit breaker and the fixed connecting copper bar of the isolating switch respectively penetrate out of the shell through the sleeve to be connected with an external cable, and the sleeve is used for insulation and sealing.
In some embodiments, the pole-mounted switch with the built-in isolating switch further comprises a current transformer, the current transformer is fixed on the base of the shell, a fixed end lapping copper bar of the circuit breaker penetrates through the current transformer to be connected with the bushing in an installing mode, and the current transformer is used for monitoring current on line.
The fixed end lapping copper bar of the circuit breaker is respectively electrically connected with A, B, C three phases through a sleeve; and the voltage sensor is connected with a fixed end lap copper bar of the circuit breaker and used for monitoring three-phase voltage on line.
The bottom of the shell is also provided with a barometer for observing the gas pressure value inside the shell in real time.
Has the advantages that: the pole-mounted switch with the built-in isolating switch provided by the invention has the following advantages: (1) according to the pole-mounted switch with the built-in isolating switch, the conductors except the lap joint sleeve are sealed in the shell, so that the protection level is high, and the operation is safe and reliable;
(2) according to the pole-mounted switch with the built-in isolating switch, the box body can be filled with pollution-free environment-friendly gas with high insulating property to replace the conventional SF6A gas;
(3) according to the pole-mounted switch with the built-in isolating switch, the isolating switch and the circuit breaker are in modular design, the consistency performance is high, the synchronism and interchangeability are good, and the pole-mounted switch is economical and practical.
Drawings
Fig. 1 is an internal structural diagram of a circuit breaker and a disconnector in a closed state in the embodiment of the present invention.
Fig. 2 is an internal structural view of the circuit breaker and the disconnector in an open state in the embodiment of the present invention.
Fig. 3 is a top view of the circuit breaker and the disconnector in a closed state according to the embodiment of the present invention.
Fig. 4 is a front view of the circuit breaker in a closed state according to the embodiment of the present invention.
Fig. 5 is a top view of the circuit breaker in a closed state according to the embodiment of the present invention.
Fig. 6 shows the relative position and movement curve of the roller when the circuit breaker is in a closed state according to the embodiment of the present invention.
Fig. 7 shows the relative position and movement curve of the roller when the breaker is in the open state according to the embodiment of the invention.
Fig. 8 is a mechanism interlocking position diagram of the breaker set in the opening state and the disconnecting switch in the closing state in the embodiment of the invention.
Fig. 9 is a diagram of the interlocking position of the mechanism when the breaker set and the disconnector are in a closing state in the embodiment of the invention.
FIG. 10 is a schematic view of the mechanism interlock position in an embodiment of the present invention;
FIG. 11 is a front view of a disconnect switch in an embodiment of the present invention;
FIG. 12 is a side cross-sectional view of a disconnect switch in an embodiment of the present invention;
FIG. 13 is a front view of the anchor block in an embodiment of the present invention;
fig. 14 is a top view of the fixing base in the embodiment of the present invention.
In the figure: the circuit breaker comprises a shell (1), a circuit breaker (2), a transmission main shaft (201), a switching-on and switching-off sliding groove plate (202), a vacuum arc extinguish chamber (203), a static end lapping copper bar (204), a flexible connection (205), an isolation lapping copper bar (206), a circuit breaker pressure spring (207), a mounting plate (208), an insulating frame (209), a fixing seat (210), a roller (211), an arc-shaped sliding groove (212), a mounting hole (213), a limiting groove (214) and a circular ring notch (215); the device comprises an isolating switch (3), an isolating main shaft (301), a movable knife board (302), an isolating pressure spring (303), a fixed connecting copper bar (304), an insulating fixed seat (305), a bracket (306) and a static contact (307); the circuit breaker comprises a circuit breaker operating mechanism (4), a circuit breaker mechanism main shaft (401), an isolation operating mechanism (5), an isolation mechanism main shaft (501), a limiting sliding groove (502), an interlocking plate (6), a protrusion (601), an isolation boss (602), an explosion-proof assembly (7), a sleeve (8), a current transformer (9), a voltage sensor (10), an air pressure gauge (11), a hanging bracket (12) and a lifting handle (13).
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may also include different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Example 1
As shown in fig. 1, 2 and 3, a pole-mounted switch with a built-in isolating switch comprises a shell (1), a circuit breaker (2), an isolating switch (3), a circuit breaker operating mechanism (4), an isolating operating mechanism (5) and an interlocking plate (6);
a circuit breaker (2) and a disconnecting switch (3) are arranged in the shell (1), and the circuit breaker (2) and the disconnecting switch (3) are arranged up and down to form an upper circuit breaker and lower isolating structure; an isolation operating mechanism (5) and a circuit breaker operating mechanism (4) are arranged at corresponding positions on the front part of the shell (1);
an isolation main shaft (301) of the isolation switch (3) is connected with an isolation mechanism main shaft (501) of the isolation operation mechanism (5), and the isolation switch (3) is switched on and off by operating the isolation operation mechanism;
the transmission part of the circuit breaker (2) is connected with a circuit breaker mechanism main shaft (401) of a circuit breaker operating mechanism (4), and the circuit breaker operating mechanism is operated to realize the on-off of a vacuum arc extinguish chamber in the circuit breaker, namely the on-off of the circuit breaker (2); the transmission part comprises a transmission main shaft (201);
the upper part of the interlocking plate (6) is hinged with a breaker mechanism spindle (401) of the breaker operating mechanism (4) through a crank arm; the lower part of the interlocking plate (6) is installed in a limit chute (502) of the isolation operating mechanism (5) in a limiting way, and the interlocking plate (6) can move along the direction of the limit chute (502) under the rotation of a main shaft (401) of the circuit breaker mechanism of the circuit breaker operating mechanism (4);
in the isolation operation mechanism (5), an isolation boss (602) is fixedly connected with a main shaft (501) of the isolation mechanism, and a protrusion (601) matched with the isolation boss (602) is correspondingly arranged at the lower part of the interlocking plate (6);
when the circuit breaker (2) is in a closing state, the protrusion (601) at the lower end of the interlocking plate (6) is in contact with the isolation boss (602) to limit the rotation of the main shaft (501) of the isolation mechanism, so that the isolation operating mechanism (5) is in a locking state and cannot rotate the isolation switch.
In some embodiments, the breaker operating mechanism (4) and the isolation operating mechanism (5) are fixedly installed on the outer side of the shell (1) through bolts and are sealed through a mechanism cover. The circuit breaker operating mechanism (4) and the isolation operating mechanism (5) are provided with interlocking plates (6), and interlocking functions are realized through relative positions of the interlocking plates.
As shown in fig. 11 and 12, the disconnecting switch (3) includes an isolating main shaft (301), a moving knife board (302), an isolating pressure spring (303), a fixed connecting copper bar (304), an insulating fixed seat (305), a bracket (306), and a static contact (307) electrically connected with an isolating overlapping copper bar of the circuit breaker (2);
two ends of an insulating fixed seat (305) are respectively installed and fixed in the shell (1) through a bracket (306), a fixed connecting copper bar (304) is fixed in the insulating fixed seat (305), one end of the fixed connecting copper bar is connected with the movable knife board (302), and the other end of the fixed connecting copper bar extends to the sleeve (8);
the two ends of the isolation main shaft (301) are rotatably arranged on the bracket (306), the movable knife board (302) is fixedly arranged in the isolation main shaft (301), and the lower end of the movable knife board (302) is movably connected to the fixedly connected copper bar (304);
the movable knife board (302) is provided with an isolation pressure spring (303) at the joint of the isolation main shaft (301) and the fixed connection copper bar (304), and the isolation pressure spring (303) is compressed for a certain length to provide necessary contact pressure; the isolation main shaft (301) is connected with the isolation operating mechanism through a connecting piece;
under the main action force of the isolation operating mechanism (5), the isolation main shaft (301) rotates to drive the movable knife board (302) to rotate, so that the upper end of the movable knife board (302) is disconnected or connected with the static contact (307), and the disconnecting and closing of the isolation switch are realized.
As shown in fig. 4 and 5, the circuit breaker (2) includes a transmission main shaft (201), a switching-on/off sliding groove plate (202), a vacuum arc-extinguishing chamber (203), a static end lapping copper bar (204), a flexible connection (205), an isolation lapping copper bar (206), and a circuit breaker pressure spring (207);
the transmission main shaft (201) is fixedly connected with a switching-on/off sliding groove plate (202),
the outer end of a static conducting rod of the vacuum arc-extinguishing chamber (203) is fixedly connected with a static end lapping copper bar (204); the outer end of a movable conducting rod of the vacuum arc extinguish chamber (203) is connected with an isolation lap copper bar (206) through a flexible connection (205); the flexible connection (205) is connected with a circuit breaker pressure spring (207), a roller (211) is arranged at the connection end of the circuit breaker pressure spring (207), and the roller (211) is slidably connected and installed in an arc-shaped sliding groove (212) of the opening and closing sliding groove plate (202);
under the main action force of a circuit breaker operating mechanism (4), a transmission main shaft (201) drives the opening and closing sliding groove plate (202) to rotate, and a roller (211) of a circuit breaker pressure spring (207) slides relatively in an arc-shaped sliding groove (212) of the opening and closing sliding groove plate (202), so that opening and closing of the circuit breaker (2) are realized.
In some embodiments, the circuit breaker (2) further comprises a fixing seat (210), the fixing seat (210) is fixedly installed on the insulating frame (209), as shown in fig. 13 and 4, the fixing seat (210) is provided with an installation hole (213) for penetrating the transmission main shaft (201) and a limit groove (214) matched with the end of the circuit breaker pressure spring (207); the transmission main shaft (201) penetrates through an installation hole (213) of the fixed seat (210), the end part of the pressure spring (207) of the circuit breaker is installed in the limiting groove (214) in a sliding mode, and the end part of the pressure spring (207) of the circuit breaker can move in a telescopic mode along the direction of the limiting groove (214); and a threaded hole is formed in the lower end platform of the fixed seat (210) and used for connecting and installing the isolated lapped copper bar (206) and the static contact (307).
The fixing seat (210) is made of hard aluminum 112, is formed by three-dimensional numerical control machining or injection molding, and is not provided with sharp edges and corners which are designed to be circular arcs so as to reduce internal stress. And the lower end of the fixed seat (210) is provided with a circular ring notch (215) for providing a movement space for flexible connection in the switching-on and switching-off process.
The circuit breaker (2) and the isolating switch (3) are of an integrated assembly structure and are in modular design, and the circuit breaker and the isolating switch are integrally installed in the shell after being externally assembled, so that the cost is lower than that of a solid-sealed type circuit breaker and the characteristics are stable than those of a single-phase assembly type circuit breaker; the isolating switch (3) is internally provided with the movable knife board (302) which is in contact fit with the isolation lap copper bar (206), and the relative positions of the isolating switch (3) and the isolation lap copper bar (206) are integrally adjusted to realize the three-phase identity characteristic of the product.
As shown in fig. 6, when the circuit breaker (2) is at the closing position, the position where the roller (211) finally stays is on the curve 4, the curve 4 is a circular arc with the center of circle at the rotation center of the opening and closing sliding groove plate, the over travel of the roller (211) at any position on the curve 4 is not changed, the angle of the curve 4 must be ensured to be larger than 10 degrees for adjustment due to the overshoot of closing, etc., after the opening and closing sliding groove plate rotates 90 degrees, the position where the roller (211) finally stays is on the curve 1 when the circuit breaker is at the opening position as shown in fig. 7, the curve 1 is a circular arc with the center of circle at the rotation center of the opening and closing sliding groove plate, the opening distance of the roller (211) at any position on the curve 1 is not changed, the angle of the curve 1 must be ensured to be larger than 10 degrees for adjustment due to the buffering of opening, the radius of the curve 4 minus the radius of the curve 1 is equal to the over travel plus opening distance, the two curves are tangent to each other respectively at a curve 1 and a curve 4, the slope gradually decreases from the curve 3 to the curve 2, the motion process is smooth and has no convex point, and the roller (211) can meet the stroke characteristic required by the switch after the switching-on and switching-off process is in place.
In some embodiments, the circuit breaker (2) further comprises a mounting plate (208), the transmission main shaft (201) is movably mounted in the mounting plate (208), and the vacuum arc-extinguishing chamber (203) is mounted on the mounting plate (208) through an insulating frame (209).
In some embodiments, the arc-shaped sliding groove (212) of the opening and closing sliding groove plate (202) is formed by connecting a plurality of sections of arcs; sequentially comprises a curve 1, a curve 2, a curve 3 and a curve 4;
the curve 4 is a circular arc with the circle center at the rotating center of the opening and closing sliding groove plate, the overtravel of the roller (211) is unchanged at any position on the curve 4, and the breaker is at the switching-on position; the angle of curve 4 is greater than 10 degrees;
when the opening and closing sliding groove plate rotates by 90 degrees, the position where the roller (211) stays is located on a curve 1, the circuit breaker is located at a switching-off position, the curve 1 is an arc with the circle center at the rotating center of the opening and closing sliding groove plate, the opening distance of the roller (211) is unchanged at any position on the curve 1, the angle of the curve 1 is larger than 10 degrees, the radius of the curve 1 subtracted from the radius of a curve 4 is equal to the overtravel plus the opening distance, the curve 2 and the curve 3 are transition curves, the curve 2 is tangent to the curve 1, the curve 3 is tangent to the curve 4, the slope of the process from the curve 3 to the curve 2 is gradually reduced, the moving process is smooth and has no convex points, and the roller (211) can meet the stroke characteristic required by.
In some embodiments, the pole-mounted switch with the built-in isolating switch further comprises an explosion-proof assembly (7), a pressure relief channel is arranged on the rear wall of the shell (1), and the explosion-proof assembly (7) covers the pressure relief channel and is used for increasing air pressure due to internal failure and forming the pressure relief channel through the explosion-proof assembly (7) so as to guarantee personal safety.
In some embodiments, the fixed end lapping copper bar (204) of the circuit breaker (2) and the fixed connection copper bar (304) of the isolating switch (3) respectively penetrate out of the shell (1) through the sleeve (8) to be connected with an external cable, and the sleeve (8) is used for insulation and sealing.
In some embodiments, the pole-mounted switch with the built-in isolating switch further comprises a current transformer (9), the current transformer (9) is fixed on a base of the shell (1), a fixed end lapping copper bar (204) of the circuit breaker (2) penetrates through the current transformer (9) to be connected with the sleeve (8) in an installing mode, and the current transformer (9) is used for monitoring current on line.
The fixed end lapping copper bar (204) of the circuit breaker (2) is respectively in three-phase electric connection with A, B, C through a sleeve (8); the voltage sensor (10) is connected with a fixed end lapping copper bar (204) of the circuit breaker (2) and used for monitoring three-phase voltage on line.
In some embodiments, the bottom of the shell (1) is further provided with a gas pressure meter (11) for observing the gas pressure value inside the shell (1) in real time.
In some embodiments, the pole-mounted switch with the built-in isolating switch further comprises a lifting frame (12) for lifting connection, and the lifting frame (12) is arranged at the top end of the shell (1).
In some embodiments, the pole-mounted switch with the built-in isolating switch further comprises lifting handles (13), and the lifting handles (13) are fixed on the left side and the right side of the shell (1) to facilitate carrying.
As shown in fig. 8, the circuit breaker is in an open state, and the disconnector is in a closed state; at the moment, the interlocking plate (6) moves to the lowest position, the protrusion (601) of the interlocking plate (6) is ineffective to the isolation boss (602), the isolating switch can be operated to rotate 90 degrees clockwise from switching on to switching off, and the isolating switch can also be operated to rotate 90 degrees anticlockwise from switching off to switching on similarly.
Fig. 10 is a schematic diagram of the interlocking position of the mechanism in an embodiment of the present invention. When the circuit breaker (2) is in a closing state, the protrusion (601) at the lower end of the interlocking plate (6) is in contact with the isolation boss (602) to limit the rotation of the main shaft of the isolation operation mechanism (12), and at the moment, the isolation operation mechanism (12) forms a locking state and cannot rotate the isolation switch any more.
As shown in fig. 9, the circuit breaker (2) and the disconnecting switch (3) are both in a closing state, at this time, the interlocking plate (6) moves to a locking position, the protrusion (601) of the interlocking plate (6) is in contact with the isolating boss (602), and at this time, the isolating operation mechanism (12) forms a locking state and cannot rotate the disconnecting switch any more. The interlocking system ensures that the circuit breaker does not open or close the disconnecting switch in a switching-on state and does not close the disconnecting switch in a switching-off state when in a switching-on position. The locking function that the interlocking possesses can effectually prevent deciliter isolator's maloperation, guarantees personal safety.
In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be considered limiting of the claimed invention.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (10)
1. A pole-mounted switch with a built-in isolating switch is characterized by comprising a shell (1), a circuit breaker (2), an isolating switch (3), a circuit breaker operating mechanism (4), an isolating operating mechanism (5) and an interlocking plate (6);
a circuit breaker (2) and a disconnecting switch (3) are arranged in the shell (1), and the circuit breaker (2) and the disconnecting switch (3) are arranged up and down to form an upper circuit breaker and lower isolating structure; an isolation operating mechanism (5) and a circuit breaker operating mechanism (4) are arranged at corresponding positions on the front part of the shell (1);
an isolation main shaft (301) of the isolation switch (3) is connected with an isolation mechanism main shaft (501) of the isolation operation mechanism (5), and the isolation switch (3) is switched on and off by operating the isolation operation mechanism;
the transmission part of the circuit breaker (2) is connected with a circuit breaker mechanism main shaft (401) of a circuit breaker operating mechanism (4), and the circuit breaker operating mechanism is operated to realize the on-off of a vacuum arc extinguish chamber in the circuit breaker, namely the on-off of the circuit breaker (2); the transmission part comprises a transmission main shaft (201);
the upper part of the interlocking plate (6) is hinged with a breaker mechanism spindle (401) of the breaker operating mechanism (4) through a crank arm; the lower part of the interlocking plate (6) is installed in a limit chute (502) of the isolation operating mechanism (5) in a limiting way, and the interlocking plate (6) can move along the direction of the limit chute (502) under the rotation of a main shaft (401) of the circuit breaker mechanism of the circuit breaker operating mechanism (4);
in the isolation operation mechanism (5), an isolation boss (602) is fixedly connected with a main shaft (501) of the isolation mechanism, and a protrusion (601) matched with the isolation boss (602) is correspondingly arranged at the lower part of the interlocking plate (6);
when the circuit breaker (2) is in a closing state, the protrusion (601) at the lower end of the interlocking plate (6) is in contact with the isolation boss (602) to limit the rotation of the main shaft (501) of the isolation mechanism, so that the isolation operating mechanism (5) is in a locking state and cannot rotate the isolation switch.
2. The pole-mounted switch with the built-in isolating switch of claim 1, wherein the isolating switch (3) comprises an isolating main shaft (301), a movable knife board (302), an isolating pressure spring (303), a fixed connecting copper bar (304), an insulating fixed seat (305), a bracket (306) and a static contact (307) electrically connected with an isolating lapping copper bar of the circuit breaker (2);
two ends of the insulating fixed seat (305) are respectively installed and fixed in the shell (1) through a bracket (306), and the fixed connecting copper bar (304) is fixed in the insulating fixed seat (305);
the two ends of the isolation main shaft (301) are rotatably arranged on the bracket (306), the movable knife board (302) is fixedly arranged in the isolation main shaft (301), and the lower end of the movable knife board (302) is movably connected to the fixedly connected copper bar (304);
the movable knife board (302) is provided with an isolation pressure spring (303) at the connection part of the isolation main shaft (301) and the fixed connection copper bar (304); the isolation main shaft (301) is connected with the isolation operating mechanism through a connecting piece;
under the main action force of the isolation operating mechanism (5), the isolation main shaft (301) rotates to drive the movable knife board (302) to rotate, so that the upper end of the movable knife board (302) is disconnected or connected with the static contact (307), and the disconnecting and closing of the isolation switch are realized.
3. The pole switch with the built-in isolating switch of claim 1, wherein the circuit breaker (2) comprises a transmission main shaft (201), a switching-on and switching-off sliding groove plate (202), a vacuum arc extinguish chamber (203), a static end lapping copper bar (204), a flexible connection (205), an isolation lapping copper bar (206) and a circuit breaker pressure spring (207);
the transmission main shaft (201) is fixedly connected with a switching-on/off sliding groove plate (202),
the outer end of a static conducting rod of the vacuum arc-extinguishing chamber (203) is fixedly connected with a static end lapping copper bar (204); the outer end of a movable conducting rod of the vacuum arc extinguish chamber (203) is connected with an isolation lap copper bar (206) through a flexible connection (205); the flexible connection (205) is connected with a circuit breaker pressure spring (207), a roller (211) is arranged at the connection end of the circuit breaker pressure spring (207), and the roller (211) is slidably connected and installed in an arc-shaped sliding groove (212) of the opening and closing sliding groove plate (202);
under the main action force of a circuit breaker operating mechanism (4), a transmission main shaft (201) drives the opening and closing sliding groove plate (202) to rotate, and a roller (211) of a circuit breaker pressure spring (207) slides relatively in an arc-shaped sliding groove (212) of the opening and closing sliding groove plate (202), so that opening and closing of the circuit breaker (2) are realized.
4. The pole switch with the built-in isolating switch of claim 3, characterized in that the breaker (2) further comprises a fixed seat (210), the fixed seat (210) is fixedly installed on the insulating frame (209), the fixed seat (210) is provided with an installation hole (213) for penetrating the transmission main shaft (201) and a limit groove (214) matched with the end of the breaker pressure spring (207); the transmission main shaft (201) penetrates through an installation hole (213) of the fixed seat (210), the end part of the pressure spring (207) of the circuit breaker is installed in the limiting groove (214) in a sliding mode, and the end part of the pressure spring (207) of the circuit breaker can move in a telescopic mode along the direction of the limiting groove (214);
and a threaded hole is formed in the lower end platform of the fixed seat (210) and used for connecting and installing the isolated lapped copper bar (206) and the static contact (307).
5. The pole-mounted switch with the built-in isolating switch as claimed in claim 4, wherein the fixing seat (210) is made of duralumin 112, and is formed by three-dimensional numerical control machining or injection molding;
and/or the lower end of the fixed seat (210) is provided with a circular ring notch (215) for providing a movement space for flexible connection in the switching-on and switching-off process.
6. The column switch with built-in disconnector according to claim 3, characterized in that the circuit breaker (2) further comprises a mounting plate (208), the transmission main shaft (201) is movably mounted in the mounting plate (208), and the vacuum interrupter (203) is mounted on the mounting plate (208) through an insulating frame (209).
7. The pole-mounted switch with the built-in isolating switch according to claim 3, wherein the arc-shaped sliding groove (212) of the opening and closing sliding groove plate (202) is formed by connecting a plurality of sections of arcs; sequentially comprises a curve 1, a curve 2, a curve 3 and a curve 4;
the curve 4 is a circular arc with the circle center at the rotation center of the opening and closing sliding groove plate (202), the overtravel of the roller (211) is unchanged at any position on the curve 4, and the breaker is at the closing position; the angle of curve 4 is greater than 10 degrees;
when the opening and closing sliding groove plate (202) rotates for 90 degrees, the position where the roller (211) stays is on a curve 1, the circuit breaker is at a switching-off position, the curve 1 is an arc with the circle center at the rotating center of the opening and closing sliding groove plate, the opening distance of the roller (211) is unchanged at any position on the curve 1, the angle of the curve 1 is larger than 10 degrees, the radius of the curve 1 subtracted from the radius of a curve 4 is equal to the overtravel plus the opening distance, the curve 2 and the curve 3 are transition curves, the curve 2 is tangent to the curve 1, the curve 3 is tangent to the curve 4, the slope of the process from the curve 3 to the curve 2 is gradually reduced, the moving process is smooth and has no convex point, and the roller (211) can meet the stroke characteristic required by the switch.
8. The pole switch with the built-in isolating switch according to claim 1, further comprising an explosion-proof assembly (7), wherein a pressure relief channel is arranged on the rear wall of the housing (1), and the explosion-proof assembly (7) covers the pressure relief channel.
9. The pole-mounted switch with the built-in isolating switch as claimed in claim 2, characterized in that the fixed connecting copper bars (304) of the isolating switch (3) respectively pass through the housing (1) through bushings (8) for connecting with external cables, the bushings (8) being used for insulation and sealing.
10. The pole-mounted switch with the built-in isolating switch of claim 3, characterized by further comprising a current transformer (9), wherein the current transformer (9) is fixed on a base of the shell (1), a fixed end lapping copper bar (204) of the circuit breaker (2) penetrates through the current transformer (9) to be connected with the bushing (8) in an installing mode, and the current transformer (9) is used for monitoring current on line;
and/or the fixed end lapping copper bar (204) of the circuit breaker (2) is electrically connected with A, B, C three phases through a sleeve (8) respectively; the voltage sensor (10) is connected with a fixed end lapping copper bar (204) of the circuit breaker (2) and is used for monitoring three-phase voltage on line;
and/or the bottom of the shell (1) is also provided with a barometer (11) for observing the gas pressure value inside the shell (1) in real time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911213306.4A CN110853952A (en) | 2019-12-02 | 2019-12-02 | Pole-mounted switch with built-in isolating switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911213306.4A CN110853952A (en) | 2019-12-02 | 2019-12-02 | Pole-mounted switch with built-in isolating switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110853952A true CN110853952A (en) | 2020-02-28 |
Family
ID=69607574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911213306.4A Pending CN110853952A (en) | 2019-12-02 | 2019-12-02 | Pole-mounted switch with built-in isolating switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110853952A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112216550A (en) * | 2020-10-09 | 2021-01-12 | 南京四方致捷开关有限公司 | Pole-mounted circuit breaker with built-in isolating switch |
| CN113192789A (en) * | 2021-03-24 | 2021-07-30 | 天津平高智能电气有限公司 | On-pole isolating switch and wiring terminal thereof |
| CN113327804A (en) * | 2021-05-26 | 2021-08-31 | 许继集团有限公司 | Isolation operation mechanism for column |
| WO2022120775A1 (en) * | 2020-12-09 | 2022-06-16 | 中国电力科学研究院有限公司 | Pole-mounted combined electrical appliance |
-
2019
- 2019-12-02 CN CN201911213306.4A patent/CN110853952A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112216550A (en) * | 2020-10-09 | 2021-01-12 | 南京四方致捷开关有限公司 | Pole-mounted circuit breaker with built-in isolating switch |
| CN112216550B (en) * | 2020-10-09 | 2024-01-09 | 南京四方致捷开关有限公司 | Column circuit breaker with built-in isolating switch |
| WO2022120775A1 (en) * | 2020-12-09 | 2022-06-16 | 中国电力科学研究院有限公司 | Pole-mounted combined electrical appliance |
| CN113192789A (en) * | 2021-03-24 | 2021-07-30 | 天津平高智能电气有限公司 | On-pole isolating switch and wiring terminal thereof |
| CN113327804A (en) * | 2021-05-26 | 2021-08-31 | 许继集团有限公司 | Isolation operation mechanism for column |
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