High-voltage circuit breaker

Abstract

The utility model relates to a high-voltage circuit breaker, and relates to the field of power equipment. The utility model provides a high-voltage circuit breaker. The high-voltage circuit breaker comprises a shell, a first linkage structure and a second linkage structure, a static knife holder and a vacuum circuit breaker are fixed on the shell; the first linkage structure is arranged on the shell, a plurality of movable blades are arranged on the first linkage structure, and the first linkage structure is used for driving the movable blades and the static blade holder to be switched on or switched off; the second linkage structure is arranged on the shell, the second linkage structure is in transmission connection with the movable end of the vacuum arc extinguish chamber of the vacuum circuit breaker, and the second linkage structure is used for driving the vacuum circuit breaker to be switched on or switched off. The high-voltage circuit breaker can have the functions of a circuit breaker and an isolating switch at the same time, is simple in structural form, convenient to install and low in manufacturing cost, and can be used in 36 kV and 40.5 kV voltage classes.

Description

Technical Field

[0001] The utility model relates to the field of electric power equipment, in particular to a high-voltage circuit breaker. Background Art

[0002] The inventors have found that currently domestic ring main cabinets are mainly used for ring network power distribution. Main circuit components such as vacuum circuit breakers, load switches, and disconnectors are installed inside them. The entire main circuit is enclosed in a fully enclosed gas box. Due to the limited internal space for installing the equipment, when the voltage level is high, the vacuum circuit breaker and disconnector cannot be effectively set in the box body. Utility Model Content

[0003] The utility model aims to provide a high-voltage circuit breaker which can have the functions of a vacuum circuit breaker and an isolating switch at the same time, and has a simple structure and is easy to install.

[0004] The embodiment of the utility model is achieved as follows:

[0005] The utility model provides a high-voltage circuit breaker, comprising: a housing, on which a plurality of stationary knife seats and a vacuum circuit breaker are fixed;

[0006] A first linkage structure, wherein the first linkage structure is disposed on the housing, a plurality of movable blades are disposed on the first linkage structure, and the first linkage structure is used to drive the movable blades and the stationary blade holder to close or open the switch;

[0007] The second linkage structure is arranged on the shell, the second linkage structure is transmission-connected with the moving end of the vacuum interrupter of the vacuum circuit breaker, and the second linkage structure is used to drive the moving end of the vacuum interrupter of the vacuum circuit breaker to close or open.

[0008] Furthermore, a plurality of connection seats are provided on the shell, and the static end of the vacuum circuit breaker and the static knife seat are fixed on the connection seats at the same time.

[0009] Furthermore, an insulating shaft is provided on the shell, one end of the plurality of movable blades is movably connected to the insulating shaft, and the middle parts of the plurality of movable blades are movably connected to the first linkage structure.

[0010] Furthermore, the first linkage structure includes a plurality of first transmission crank arms and a transmission shaft, and both ends of the transmission shaft are movably connected to the housing;

[0011] One end of each of the first transmission crank arms is movably connected to the transmission shaft, and the other end is movably connected to the middle portion of the movable blade.

[0012] Furthermore, the shell is provided with a plurality of grounding knife seats, the plurality of grounding knife seats are connected with grounding screws, and the grounding screws are sleeved with connecting copper tubes;

[0013] The first linkage structure drives the movable blade to be connected to the connecting copper tube for grounding.

[0014] Furthermore, the second linkage structure includes a main shaft and a plurality of second transmission crank arms, one end of the plurality of second transmission crank arms is movably connected to the main shaft, and the other end thereof is movably connected to the movable ends of the plurality of vacuum circuit breakers;

[0015] The middle parts of the plurality of second transmission crank arms are movably connected to a plurality of fixed shafts respectively, and the plurality of fixed shafts are fixed to the housing.

[0016] Furthermore, the vacuum circuit breaker comprises a vacuum interrupter, the static end of the vacuum interrupter is fixed to the housing, and the dynamic output end of the vacuum interrupter is connected to a conductive column and an insulating pull rod through a screw;

[0017] The other end of the insulating pull rod is transmission-connected to the second linkage structure.

[0018] Furthermore, the conductive column is connected to the conductive block via a finger spring, and the conductive block is fixed to the housing.

[0019] Furthermore, one end of the insulating pull rod is connected to the conductive column, and the other end is threadedly connected to a double-headed screw;

[0020] The double-headed screw is transmission-connected to the second linkage structure.

[0021] Furthermore, a groove is formed on the shell.

[0022] The beneficial effects of the embodiments of the utility model are:

[0023] The high-voltage circuit breaker of the utility model can have the functions of a circuit breaker and an isolating switch at the same time, has a simple structure, is easy to install, has a low manufacturing cost, and can meet the use of 36kV and 40.5kV voltage levels; at the same time, it can synchronously drive multiple isolating switches to switch between the three positions of closing, opening and grounding through the first linkage structure, so as to realize the synchronous power supply, power failure and grounding maintenance functions of the three phases of the isolating switches, and at the same time, it is more convenient to manufacture and has better consistency; the moving end of the vacuum circuit breaker is synchronously driven through the second linkage structure to realize the synchronous closing and opening of the three phases of the vacuum circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 This is a schematic structural diagram of a high voltage circuit breaker according to an embodiment of the utility model;

[0026] Figure 2 This is a schematic structural diagram of a high voltage circuit breaker with the front side plate removed according to an embodiment of the utility model.

[0027] Icons: 100-high voltage circuit breaker; 110-housing; 111-front side plate; 112-rear side plate; 113-left side plate; 114-right side plate; 115-left connecting plate; 116-right connecting plate; 117-insulating plate; 118-connecting seat; 119-groove; 120-vacuum circuit breaker; 121-vacuum arc extinguishing chamber; 122-insulating pull rod; 123-double-headed screw; 124-conductive block; 130-second linkage structure; 131-main shaft; 132-second transmission crank arm; 133-fixed shaft; 140-isolating switch; 141-static knife seat; 142-moving knife blade; 143-insulating shaft; 150-first linkage structure; 151-first transmission crank arm; 152-transmission shaft; 160-grounding knife seat; 161-grounding screw. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply 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 utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0032] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Please refer to Figure 1-Figure 2 A high-voltage circuit breaker 100 proposed in this embodiment includes a housing 110, a first linkage structure 150 and a second linkage structure 130; a plurality of stationary knife seats 141 and a vacuum circuit breaker 120 are fixed on the housing 110; the first linkage structure 150 is arranged on the housing 110, and a plurality of movable knife seats 142 are arranged on the first linkage structure 150, and the first linkage structure 150 is used to drive the movable knife seats 142 and the stationary knife seats 141 to close or open the circuit; the second linkage structure 130 is arranged on the housing 110, and the second linkage structure 130 is transmission-connected to the moving end of the vacuum interrupter of the vacuum circuit breaker 120, and the second linkage structure 130 is used to drive the moving end of the vacuum interrupter of the vacuum circuit breaker 120 to close or open the circuit.

[0035] It can be understood that the first linkage mechanism drives the moving blade 142 and the stationary blade seat 141 to close or open the switch, so as to realize the power supply and power off functions of the disconnector 140; the second linkage structure 130 is actuated to realize the closing or opening of the vacuum circuit breaker 120. The high-voltage circuit breaker 100 has a simple structure, is easy to install, has a low manufacturing cost, and can meet the voltage level of 36kV and above.

[0036] In this embodiment, please refer to Figure 1-Figure 2 , the high voltage circuit breaker 100 includes a housing 110 .

[0037] Specifically, the shell 110 includes a front side plate 111 and a rear side plate 112; the upper ends of the front side plate 111 and the rear side plate 112 are connected and fixed to the left side plate 113 and the right side plate 114 by fasteners; the lower ends of the front side plate 111 and the rear side plate 112 are connected and fixed to the left connecting plate 115 and the right connecting plate 116 by fasteners; and the lower ends of the left connecting plate 115 and the right connecting plate 116 are connected to an insulating plate 117 by fasteners.

[0038] A plurality of connection seats 118 , a plurality of conductive blocks 124 , and a plurality of fixed shafts 133 are clamped and fixed on the front side plate 111 and the rear side plate 112 .

[0039] Insulating shafts 143 are fixed to the left connecting plate 115 and the right connecting plate 116 .

[0040] A plurality of grounding knife seats 160 are fixed on the insulating plate 117 , and a grounding screw 161 for grounding is connected to the plurality of grounding knife seats 160 , and a connecting copper tube is sleeved on the grounding screw 161 .

[0041] Among them, the above-mentioned side panels are all made of high-performance insulating panels 117.

[0042] Wherein, grooves 119 are opened on the front side plate 111 and the rear side plate 112 to improve the insulation performance.

[0043] In this embodiment, please refer to Figure 2 , the high voltage circuit breaker 100 includes a vacuum circuit breaker 120 .

[0044] Specifically, the vacuum circuit breaker 120 includes a vacuum arc chamber 121, a conductive column (not shown), an insulating rod 122 and a double-headed screw 123. The moving end output end of the vacuum arc chamber 121 is connected to the insulating rod 122 through a screw; one end of the insulating rod 122 is connected to the conductive column, and the other end is provided with a nut and is connected to one end of the double-headed screw 123 through a thread; the other end of the double-headed screw 123 is transmission-connected to the second transmission arm 132 of the second linkage structure 130.

[0045] Among them, the conductive block 124 arranged on the rear side plate 112 is provided with a through hole, the conductive column passes through the through hole, and is connected to the contact finger spring in the through hole. The conductive column moves with the moving end of the arc extinguishing chamber to ensure the effective connection of the conductor. The connection between the two has excellent conductive performance and a better electric field.

[0046] The static end of the vacuum interrupter 121 is fixed to the connection base 118 , and the static blade base 141 of the disconnector 140 is pressed and fixed to the upper end surface of the connection base 118 by the static end of the vacuum interrupter 121 .

[0047] The insulating pull rod 122 is provided with a spring.

[0048] The opening distance and overtravel of the switch can be adjusted by adjusting the nut at the tail of the insulating pull rod 122 and the double-headed screw 123, which is convenient for adjustment.

[0049] It can be understood that the second linkage structure 130 drives the insulating pull rod 122 to drive the conductive column to move, and the conductive column then drives the moving end of the vacuum arc chamber 121 to provide contact pressure for the arc chamber, thereby realizing the closing and opening of the vacuum circuit breaker 120.

[0050] In this embodiment, there are three vacuum circuit breakers 120, which are arranged vertically. In other embodiments, the number of vacuum circuit breakers 120 is selected according to actual conditions.

[0051] In this embodiment, please refer to Figure 2 , the high voltage circuit breaker 100 includes a second linkage structure 130 .

[0052] Specifically, the second linkage structure 130 includes a main shaft 131 and three second transmission crank arms 132, one end of the three second transmission crank arms 132 is movably connected to the main shaft 131, and the other end is movably connected to multiple double-headed screws 123 of the vacuum circuit breakers 120; the middle parts of the three second transmission crank arms 132 are respectively movably connected to multiple fixed shafts 133, and the multiple fixed shafts 133 are fixed on the rear side plate 112 of the shell 110.

[0053] The second transmission crank arm 132 includes two C-shaped plates, the middle openings of the two C-shaped plates penetrate the fixed shaft 133, and are movably connected to the fixed shaft 133. One end of the two C-shaped plates clamps the main shaft 131 and is movably connected to the main shaft 131 through an axle pin; the other end clamps the connecting block and is movably connected to the connecting block through an axle pin, and the double-headed screw 123 is fixed to the connecting block.

[0054] It can be understood that the main shaft 131 moves left and right, and synchronously drives the double-headed screw 123 of the vacuum circuit breaker 120B phase through the three second transmission crank arms 132, thereby realizing the synchronous closing and opening of the vacuum circuit breaker 120A phase.

[0055] In this embodiment, please refer to Figure 1-Figure 2 , the high voltage circuit breaker 100 includes a disconnect switch 140 .

[0056] Specifically, the isolating switch 140 includes a stationary blade seat 141 and a moving blade 142. One end of the moving blade 142 is hinged to the insulating shaft 143, and the middle of the moving blade 142 is movably connected to the first transmission crank arm 151 of the first linkage structure 150. The stationary blade seat 141 is pressed and fixed on the connecting seat 118.

[0057] Among them, the moving blade 142, the stationary blade seat 141 and the grounding blade seat 160 are all located on the same arc, so that the first linkage structure 150 can drive the moving blade 142 and the stationary blade seat 141 to close or open the switch and connect to the grounding blade seat 160 for grounding.

[0058] In this embodiment, the three phases of the isolating switches 140 are arranged longitudinally.

[0059] In this embodiment, please refer to Figure 1-Figure 2 , the high voltage circuit breaker 100 includes a first linkage structure 150 .

[0060] Specifically, the first linkage structure 150 includes three first transmission crank arms 151 and a transmission shaft 152, and both ends of the transmission shaft 152 are movably connected to the left connecting plate 115 and the right connecting plate 116; one end of the three first transmission crank arms 151 is movably connected to the transmission shaft 152, and the other end is movably connected to the middle part of the movable blade 142.

[0061] The transmission shaft 152 is a square main shaft 131 .

[0062] The first transmission crank arm 151 is also composed of two arc-shaped plates; a through hole is provided at one end of the first transmission crank arm 151, and the first transmission crank arm 151 is fixed to the transmission shaft 152 through the through hole. The other end of the first transmission crank arm 151 is movably connected to one end of a connecting plate, and the other end of the connecting plate is movably connected to the middle part of the moving blade 142 through a shaft pin.

[0063] It can be understood that the three movable blades 142 are synchronously driven to connect with the static blade holder 141 to achieve closing by rotating the transmission shaft 152; the movable blades 142 are driven to separate from the static blade holder 141 to achieve opening; and the movable blades 142 are driven to connect with the grounding blade holder 160 to achieve grounding. The first linkage structure 150 drives the disconnector 140 to switch between the three positions of closing, opening and grounding, so as to realize the power supply, power off and grounding maintenance functions of the disconnector 140, and the manufacturing is more convenient and the three-phase consistency is better.

[0064] In summary, the high-voltage circuit breaker 100 of the utility model can simultaneously have the functions of the vacuum circuit breaker 120 and the disconnector 140, and its structure is simple, the installation is convenient, the manufacturing cost is low, and it can meet the use of 36kV and 40.5kV voltage levels; at the same time, it can synchronously drive multiple disconnectors 140 to switch between the three positions of closing, opening and grounding through the first linkage structure 150, so as to realize the synchronous power supply, power off and grounding maintenance functions of the three phases of the disconnector 140, and it is more convenient to manufacture and has better consistency; the moving end of the vacuum circuit breaker 120 is synchronously driven by the second linkage structure 130 to realize the synchronous closing and opening of the three phases of the vacuum circuit breaker 120.

[0065] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high voltage circuit breaker, characterized in that: include: A housing, on which a plurality of stationary knife seats and vacuum circuit breakers are fixed; A first linkage structure, wherein the first linkage structure is disposed on the housing, a plurality of movable blades are disposed on the first linkage structure, and the first linkage structure is used to drive the movable blades and the stationary blade holder to close or open the switch; The second linkage structure is arranged on the shell, the second linkage structure is transmission-connected with the moving end of the vacuum interrupter of the vacuum circuit breaker, and the second linkage structure is used to drive the moving end of the vacuum interrupter of the vacuum circuit breaker to close or open.

2. The high voltage circuit breaker according to claim 1, characterized in that: The shell is provided with a plurality of connection seats, and the static end of the vacuum circuit breaker and the static knife seat are fixed on the connection seats at the same time.

3. The high voltage circuit breaker according to claim 1, characterized in that: An insulating shaft is arranged on the shell, one end of the plurality of movable blades is movably connected to the insulating shaft, and the middle parts of the plurality of movable blades are movably connected to the first linkage structure.

4. The high voltage circuit breaker according to claim 3, characterized in that: The first linkage structure includes a plurality of first transmission crank arms and a transmission shaft, and both ends of the transmission shaft are movably connected to the housing; One end of each of the first transmission crank arms is movably connected to the transmission shaft, and the other end is movably connected to the middle portion of the movable blade.

5. The high voltage circuit breaker according to claim 1, characterized in that: The shell is also provided with a plurality of grounding knife seats, the plurality of grounding knife seats are connected with grounding screws, and the grounding screws are sleeved with connecting copper tubes; The first linkage structure drives the movable blade to be connected to the connecting copper tube for grounding.

6. The high voltage circuit breaker according to claim 1, characterized in that: The vacuum circuit breaker comprises a plurality of; The second linkage structure comprises a main shaft and a plurality of second transmission crank arms, one end of the plurality of second transmission crank arms being movably connected to the main shaft, and the other end of the plurality of second transmission crank arms being movably connected to the movable ends of the vacuum interrupter chambers of the plurality of vacuum circuit breakers; The middle parts of the plurality of second transmission crank arms are movably connected to a plurality of fixed shafts respectively, and the plurality of fixed shafts are fixed to the housing.

7. The high voltage circuit breaker according to claim 1, characterized in that: The vacuum circuit breaker comprises a vacuum interrupter, the static end of the vacuum interrupter is fixed to the housing, and the dynamic output end of the vacuum interrupter is connected to a conductive column and an insulating pull rod through a screw; The other end of the insulating pull rod is transmission-connected to the second linkage structure.

8. The high voltage circuit breaker according to claim 7, characterized in that: The conductive column is connected to the conductive block via a finger spring, and the conductive block is fixed to the housing.

9. The high voltage circuit breaker according to claim 7, characterized in that: One end of the insulating pull rod is connected to the conductive column, and the other end is connected to a double-headed screw through a thread; The double-headed screw is transmission-connected to the second linkage structure.

10. The high voltage circuit breaker according to claim 1, characterized in that: The shell body is provided with grooves.

Images